467 results about "Coupling beam" patented technology

A diffractive beam expander (50) comprises a substantially planar waveguiding substrate, an input grating (10) to provide an in-coupled beam (B1) propagating within said substrate, and an output grating (30) to provide an out-coupled beam. The expander (50) comprises also four or more further grating portions to expand the height of the in-coupled beam (B1). A part of the in-coupled light is diffracted by a first deflecting grating portion (21a) to provide a first deflected beam. A part of the in-coupled light is diffracted by a second deflecting grating portion (22a) to provide a second deflected beam. The first deflected beam propagates downwards and the second deflected beam propagates upwards with respect to the in-coupled beam (B1). The first deflected beam impinges on a first direction-restoring grating portion (21b) and the second deflected beam impinges on a second direction-restoring grating portion (22b). The first restoring grating portion (21b) provides a first restored beam (V1) and the second restoring grating portion (22b) provides a second restored beam (V2), which both have the same direction as the in-coupled beam (B1). Out-coupling provides an output beam which is parallel to the input beam, and has a greater vertical dimension than said input beam.

In an angular velocity sensor, driven mass portions are disposed on a surface of a base plate at point-symmetrical locations with respect to a central point O. The driven mass portions are connected to a coupling beam to be interconnected. The coupling beam is flexibly supported through connecting portions and driven beam. Detecting mass portions are disposed inside the driven mass portions, and the detecting mass portions are supported by detecting beams to be displaceable in the Z-axis direction. Two adjacent ones of the driven mass portions in the circumferential direction are vibrated by vibration generation portions in opposite phases to each other. When angular velocities are exerted in such a state, the detecting mass portions are caused to displace and vibrate in the direction of thickness of the base plate. Displacement detecting portions detect displacements of the detecting mass portions in the direction of the thickness.

A system and method for laser beam welding at least two adjacent superalloy components involves substantially simultaneous formation of a base weld with a first filler metal placed between the components and cap weld with second filler metal formed over the base weld. A shim is inserted between the components, which may optionally be formed with a groove along the joint surface. A filler wire is fed to a location over the given surface or within the optional groove. Two lasers or a laser and coupled beam splitter supply first and second laser beams that are applied at focal points separated by a predetermined distance (e.g., 0.05-1.5 cm). The first laser beam is used to form a base weld with the first filler metal between the components, and the second laser beam is used to form a cap weld with the second filler metal on top of the base weld.

The invention relates to a shear wall structure building based on a cross-hole prefabricated reinforced concrete template and a construction method thereof, belonging to the technical field of buildings and construction thereof. In the building, a wall template, an L-shaped column template, a T-shaped column template, a rectangular column template, a cruciform column template, a coupling beam template and a superstructure template which are free of removal are mutually connected to form a polyhedral space template system; all templates are the cross-hole prefabricated reinforced concrete templates; a longitudinal through hole and a lateral through hole, which are parallel to the surface, are arranged in the templates to form hollow hole paths in all directions; reinforcing steel bars and filling concrete are alternately inserted in the hollow hole paths to form a one-layer building unit or a single-layer building with the cast-in-place concrete shear wall structure; and multiple-layer building units are lapped and combined to form the multiple-layer building with the cast-in-place concrete shear wall structure. The shear wall structure building disclosed by the invention has the advantages of simpleness of processing, low production equipment investment, reduced construction working procedures, quickened construction speed, labor saving and the like.

The invention discloses a weakly coupled MEMS resonance type accelerometer based on a mode localization effect, and belongs to the field of MEMSs. The accelerometer comprises two movable mass blocks and two single beam resonance systems, wherein the two movable mass blocks are the same completely, and the two single beam resonance systems are connected together via a mechanical coupling beam. According to the weakly coupled MEMS resonance type accelerometer disclosed by the invention, a design of single resonance beams is used, so the mode interference is greatly reduced; a capacitor plate is designed at an inside and an outside of each of the resonance beams, so the differential detection for amplitudes of the single resonance beams can be realized, not only can the intensity of a signal be enhanced, but also the feedthrough capacitance signal interference due to a potential difference between a drive electrode and a detection electrode is eliminated, and the stability and the accuracy of a measurement signal can be greatly improved; as a stiffness adjustment electrode is increased, the flexible selection for a working point and the adjustment for a linearity working range are realized; and by placing an alternating current drive electrode in the middle of the two resonance beams, the frequency components of an output signal are more single, and the detection for the output signal and the design for a closed loop control circuit are enabled to be easier.

The invention discloses a damper and the application method, in particular to a braced shear wall coupling beam energy dissipating damper and the application method. The damper comprises a mutual connection plastic yield energy dissipating work area and a keeping approximate rigidity partial fixing area, two or more than two column strip-shaped holes are arranged in work area; non-sharp corner processing is adopted at the upper ends of the strip-shaped hole. The application method of the damper for shear wall coupling beam energy dissipating comprises: the reinforced concrete coupling beam is replaced by one or more than one damper; or one or more damper is adhered to the reinforced concrete coupling beam and is positioned at the coupling beam of the shear wall. Each damper work area is provided with anti out-plane instability bolt to prevent the out-plane of each damper from instability; each damper partial fixing area is pre-stretched by high strength bolt, or each damper is welded into a whole body by cap cover plate.

In an angular velocity sensor, driven mass portions are disposed on a surface of a base plate at point-symmetrical locations with respect to a central point O. The driven mass portions are connected to a coupling beam to be interconnected. The coupling beam is flexibly supported through connecting portions and driven beam. Detecting mass portions are disposed inside the driven mass portions, and the detecting mass portions are supported by detecting beams to be displaceable in the Z-axis direction. Two adjacent ones of the driven mass portions in the circumferential direction are vibrated by vibration generation portions in opposite phases to each other. When angular velocities are exerted in such a state, the detecting mass portions are caused to displace and vibrate in the direction of thickness of the base plate. Displacement detecting portions detect displacements of the detecting mass portions in the direction of the thickness.

Provided is a novel connecting structure capable of achieving replacement of steel coupling beams. An energy dissipation beam section end board and a non-energy dissipation beam section end board are arranged at the connecting ends of an energy dissipation beam section and a non-energy dissipation beam section respectively, a shear key is arranged on the energy dissipation beam section end board, a key slot is formed in the position, corresponding to the shear key on the energy dissipation beam section end board, on the non-energy dissipation beam section end board, bolt holes connected with a high-strength bolt are further formed in the corresponding positions of the energy dissipation beam section end board and the non-energy dissipation beam section end board, the shear key bears the shearing force of the position where the energy dissipation beam section and the non-energy dissipation beam section are connected, and the high-strength bolt bears the bending moment of the position where the energy dissipation beam section and the non-energy dissipation beam section are connected. The novel connecting structure is reliable in force transmission under the action of a strong earthquake and is convenient to disassemble after the strong earthquake happens, fast replacement of the energy dissipation beam section can be ensured, the coupling beams can be repaired fast, and consequently the capacity of post-earthquake function fast recovery of high-rise building structures is improved.

The invention discloses a micro resonant accelerometer based on the principle of modal localization, which belongs to the field of micro-electromechanical systems (MEMS). The accelerometer consists oftwo identical movable masses and three resonators connected together through a mechanical coupling beam. According to the invention, the three-freedom-degree weak coupling resonators are used to further improve the sensitivity of the resonators, and the sensitivity of the accelerometer is improved; capacitor plates are arranged on inner and outer sides of each resonator; amplitude differential detection is carried out on a single resonator, which can enhance the signal intensity and eliminates feedthrough capacitor signal interference caused by the potential difference between a drive electrode and a detection electrode; the stability and accuracy of a measurement signal can be greatly enhanced; a stiffness adjustment electrode is added; and flexible working point selection and linear working scope adjustment are realized.

The invention discloses a prestressed anchor cable pile sliding wall along a river road shoulder and a construction method thereof, which relate to a high-filling retaining structure in construction fields of mountain roads and railway engineering, and comprise a circular pile, a coupling beam, T-shaped columns, retaining plates, anchor cables and anchor piers, wherein the circular pile, the coupling beam and the T-shaped columns are sequentially connected from the bottom up, the retaining plate is put at the inner side of each T-shaped column, an upper anchor pier, a middle anchor pier and a lower anchor pier are respectively arranged on the T-shaped column from top to bottom, the three fixed sections of an upper anchor cable, a middle anchor cable and a lower anchor cable are respectively anchored into a rock-soil layer, after the anchor cables pass through prepared holes of the T-shaped columns, the anchor cables are stretched and locked on the corresponding anchor piers, the inclination angles of the upper anchor cable, and the middle anchor cable and the lower anchor cable are designed to be 15 degrees, 18 degrees and 21 degrees. The invention has rational structure, easy implementation and good quality and is applicable to the construction of prestressed anchor cable pile sliding wall along the river road shoulder.

The invention belongs to the technical field of anchoring of rock and soil of civil engineering and provides an adjustable prestressed anchoring device. The anchoring device comprises an anchor cable (1), a clamping piece (2), an anchor disk (3), a base (5), a position-changing screw rod (7) and a pressure-bearing plate (8), wherein the anchor disk (3) which comprises a central threaded hole and can change the position is positioned in a column sleeve of the base and can move axially under the action of the position-changing screw rod (7), move axially relative to the base (5), the bearing plate (8), a coupling beam or a waist beam under the action of external force, enable the anchor cable which is fixed on the anchor disk (3) through the clamping piece (2) to move axially accordingly, and actively compensate for strain generated by stress variation of the anchor cable. The anchoring device can actively compensate for the strain generated by the stress variation, further enable the prestress of the prestressed anchor cable to change within an allowable range, increase the reliability of the anchoring system and improve the safety.

The invention provides a silicon micro-resonant mode pressure sensor based on a differential motion structure with a coupling beam, relating to a sensor. The silicon micro-resonant mode pressure sensor is provided with a harmonic oscillator, a rectangular silicon island, a rectangular pressure sensitive diaphragm, a silicon frame and a lower layer of glass, wherein the harmonic oscillator is provided with supporting beams, the coupling beam, a movable comb exciting electrode, a movable comb detection electrode, a fixed comb exciting electrode, a fixed comb detection electrode and a vibration mass block; the rectangular pressure sensitive diaphragm is fixed in the silicon frame; the rectangular silicon island is arranged at the position where the stress deflection angle of the rectangular pressure sensitive diaphragm is maximum; the harmonic oscillator is suspended on the surface of the rectangular pressure sensitive diaphragm by the rectangular silicon island through the supporting beams and the supporting beams are connected with the rectangular silicon island; a lead wire electrode is connected with the harmonic oscillator through a flexible beam; the supporting beams are arranged at four corners of the harmonic oscillator; the vibration mass block is connected with the rectangular silicon island and a mechanical coupling beam arranged at the middle part of the harmonic oscillator is used for connecting the vibration mass block; the vibration mass block and the coupling beam are both in suspended states and the vibration mass block is provided with a hole; and the lower layer of glass is arranged at the bottom of the silicon frame.

The invention discloses a steel coupling beam capable of being replaced after a strong earthquake, which comprises a replaceable energy dissipation beam section and non-energy-dissipation beam sections arranged at the two ends of the replaceable energy dissipation beam section. The replaceable energy dissipation beam section and the non-energy-dissipation beam sections are connected through end plates and high-strength bolts; the height of the section of the replaceable energy dissipation beam section is lower than that of the section of the non-energy-dissipation beam section; the replaceable energy dissipation beam section is uncoupled with a floor slab; the yield bearing capacity of the non-energy-dissipation beam section is larger than that of the replaceable energy dissipation beam section; the replaceable energy dissipation beam section shears yielding and dissipates earthquake energy under the effect of strong earthquake, and the non-energy-dissipation beam sections at the two ends maintain elasticity; and as the replaceable energy dissipation beam section is uncoupled with the floor slab, not only can the cracking of the floor slab under the effect of earthquake be reduced, but also the energy dissipation beam section can be rapidly replaced after the earthquake. The steel coupling beam has high energy dissipation, can be rapidly repaired after the earthquake, is convenient for construction, can enhance the capacity of rapid function recovery of high-rise structures after the strong earthquake, and has wide market promotion and application prospects.

The invention relates to a precast concrete short-pier shear wall with an infilling wall panel and a connecting method thereof. The precast concrete short-pier shear wall is an earthquakeproof wall the wall pier section of which has the height-to-thickness ratio of 5-8; and according to the current specification requirement of China, the thickness of the section of a wall body is not smaller than 200 mm and the stress performance of a precast concrete short-pier shear wall structure is larger than that of a special-shaped column and smaller than that of a general shear wall structure. The structural system has favorable performance in various aspects of architecture, structure, construction cost, energy saving, environment protection, and the like and is a structural form which is most suitable for residential construction. The precast concrete short-pier shear wall with the infilling wall panel comprises a precast concrete wall pier (1), wherein the wall pier (1) is connected with a coupling beam (2); and a big hole formed by the wall pier (1) and the coupling beam (2) is filled by the infilling wall panel. The invention is used as a residence industrial all-assembled type shear wall.

The invention provides a cantilever bay window board concrete overall pouring structure and a construction method of the cantilever bay window board concrete overall pouring structure. An upper bay window board is formed together with an above-window coupling beam and an upper layer floor through concrete overall pouring, and the inner end of an upper bay window board reinforcing steel bar of the upper bay window board extends into the above-window coupling beam to be anchored. A lower bay window board is formed together with the upper portion of a below-window coupling beam through concrete overall pouring, and the inner end of a lower bay window board reinforcing steel bar of the lower bay window board extends into the below-window coupling beam to be anchored. According to the cantilever bay window board concrete overall pouring structure and the construction method, the positions of the bay window boards are reserved in the construction process of a concrete wall, the upper bay window board and the above-window coupling beam are simultaneously formed together with the upper layer floor through pouring, the lower bay window board and the upper portion of the below-window coupling beam are simultaneously formed through pouring, the integrity is good, cracks of the root portions of the bay window boards are effectively eliminated, leakage and potential safety hazards caused by the cracks are effectively eliminated, later-period maintenance and processing expenses of a bay window are reduced, and the cantilever bay window board concrete overall pouring structure and the construction method can be widely applied to non-floor type bay window construction of a cast-in-place concrete shear wall structure house.

A novel approach to generating radiation treatment plans through a nested partitions framework provides an optimization of radiation delivery. The nested partitions approach couples beam angle selection and dose optimization to solve treatment planning problems. An optimal beam angle selection is provided to best treat tumors, while minimizing exposure to the surrounding healthy tissues.

The invention relates to self-reset shear walls with replaceable coupling beams and belongs to the field of aseismic structure systems. The self-reset shear walls are composed of replaceable coupling beams and self-reset shear wall bodies connected with the replaceable coupling beams. The replaceable coupling beams are composed of replaceable sections and non-yielding sections, and the self-reset shear wall bodies are post-tensioned un-bonded pre-cast shear walls. According to the self-reset shear walls, the concept is clear, construction is convenient, the safety of main body structures can be effectively protected during middle earthquakes or major earthquake, repair and replacing of damaged members after earthquakes are facilitated, and the self-reset shear walls are applicable to important building structures in high-intensity earthquake regions.

The invention relates to a double row pile and diagonal brace combined soft soil deep foundation pit supporting structure. An inner row pile and an outer row pile are arranged outside a foundation pit, a connecting plate, a top curing region, a pile block coupling beam and a vertical waterproof pile are arranged between the inner row pile and the outer row pile, and a vertical water-stop plate is inserted into the vertical waterproof pile; a pit bottom slurry soil fixing layer is arranged in the bottom of the foundation pit along the inner side of the inner row pile; a diagonal brace is arranged between the inner row pile and a basic raft board, and a vertical steel latticework column is arranged across the middle part of the diagonal brace; a bottom supporting pier is arranged at the connection of the diagonal brace and the basic raft board, and a waist beam is arranged at the connection of the diagonal brace and the inner row pile; and an anti-floating anchor and a main body structural pile are arranged under the basic raft board. The structure provided by the invention not only can enhance the stability of the foundation pit support structure and reduce the pit bottom rebound deformation, but also can prevent seepage failure of the foundation pit. The invention further discloses a construction method of the double row pile and diagonal brace combined soft soil deep foundation pit supporting structure.

The invention belongs to the technical field of nanomaterials and particularly relates to a GO (graphene oxide) and nano mineral powder synergistically dispersed CNT (carbon nanotube) modified nano building material as well as a preparation method and an application thereof. The GO and nano mineral powder synergistically dispersed CNT modified nano building material comprises CNT powder or a CNT dispersion liquid, GO powder or a GO dispersion liquid, nano mineral powder, a superplasticizer, water, cement and a defoamer. The prepared nano building material can realize the effect of synergistic dispersion of CNTs by GO and the nano mineral powder and solves the problem that GO is prone to deoxidation and agglomeration in an alkaline system. A prepared piezoresistive sensor based on the nano building material has good piezoresistance sensing performance, is excellent in mechanical toughness and high in compatibility with a concrete matrix, and has good application prospect in the fields of frame-shear coupling beams of high-rise buildings, energy-consuming nodes, high-strength / high-toughness joint seams between traffic bridges and pavement structures as well as large engineering health monitoring sensors.

The invention discloses a double H-type tension beam silicon micro-resonance pressure sensor chip and a preparation method thereof. The double H-type tension beam silicon micro-resonance pressure sensor chip comprises a resonator and a pressure sensitive membrane; the resonator includes resonant beams and torsion beams; four resonant beams form a group of H-beam, and two groups of H-beams are oppositely arranged; the extension parts of one end of two adjacent resonant beams are connected to the same torsion beam; the other end of each resonant beam is connected to a mass block; a coupling beamis arranged in the middle of the mass block, and a vibration pick-up resistor is arranged in the middle of the coupling beam; the two sides of the mass block are fixedly connected to two movable electrodes separately; fixed electrodes are arranged on the outside of the two movable electrodes; both ends of the fixed electrode are fixedly connected to fixed electrode anchor points; and the resonator is connected to the anchor points through connection points. The amplification principle of the anchor points is used for amplifying the stress and deformation of the pressure sensitive membrane, and then the amplified stress and deformation of the pressure sensitive membrane is transmitted to the resonator, so that the double H-beam is pulled, and the sensitivity of the sensor is improved; andthrough the symmetrical double H-type beam design, the direct energy exchange between the resonant beams and the pressure sensitive membrane is effectively avoided, and the quality factor of the sensor is improved.

The invention discloses a method for deep excavation pit combination support construction close to a subway station. The method is safe, reliable, short in construction period and low in construction cost and comprises the following steps that (1) two rows of reinforced concrete cast-in-place concrete piles are arranged at the outer side of an underground structure of an entrance and an exit of the subway station for blocking soil; (2) a single row of reinforced concrete cast-in-place concrete piles are arranged at the inner side of the underground structure of the exit and the entrance of the subway station; (3) coupling beams at the top of the reinforced concrete cast-in-plate concrete piles are constructed; and (4) when each coupling beam reaches to strength, earth excavation to a deep excavation pit is performed and in the process of excavation, a plurality of rows of steel tube inner supports are arranged transversally from top to bottom between the single row of reinforced concrete cast-in-place concrete piles and the deep excavation pit and meanwhile and meanwhile, soil nailing wall reinforce is adopted to the bottom of the underground structure of the exit and the entrance of the subway station in a matched mode until the earth excavation is performed to the bottom of the deep excavation pit.

The invention provides a replaceable steel coupling beam and double-steel-plate high-strength concrete combined coupled shear wall which comprises double-steel-plate high-strength concrete shear wall bodies and a replaceable steel coupling beam. The double-steel-plate high-strength concrete shear wall bodies and the replaceable steel coupling beam are welded together. The replaceable steel coupling beam comprises a replaceable energy-dissipation yielding beam section arranged in the midspan position of the coupled beam and non-yielding beam sections located at the two ends of the replaceable energy-dissipation yielding beam section, wherein the replaceable energy-dissipation yielding beam section is connected with the non-yielding beam sections through end plates and high-strength bolts. According to the replaceable steel coupling beam and double-steel-plate high-strength concrete combined coupled shear wall, the replaceable steel coupling beam and the double-steel-plate shear wall bodies are combined organically into the shear wall structure with the good ductility and the good energy-dissipation capacity, the design requirements of a super high-rise building structure for the high axial compression, the high ductility and a thin wall body of the shear wall can be well met, and the replaceable steel coupling beam and double-steel-plate high-strength concrete combined coupled shear wall has important theoretical significance and practical value in the improvement of the seismic performance of a high-rise structure and a super high-rise structure and disaster reduction and prevention; in addition, the replaceable steel coupling beam and double-steel-plate high-strength concrete combined coupled shear wall is simple in structure, an outer-side steel plate can also be used as a formwork, construction is convenient, and the replaceable steel coupling beam and double-steel-plate high-strength concrete combined coupled shear wall has broad application prospect.

A micromechanical rotation rate sensor, comprising at least one substrate, wherein the rotation rate sensor has at least a first and a second seismic mass which are coupled to one another by means of at least one coupling beam, and wherein the rotation rate sensor is embodied in such a way that it can detect rotation rates about at least a first and a second sensitive axis, wherein each seismic mass is assigned at least one actuator unit with which the deflection behavior of the seismic mass can be influenced.

The invention provides a piezoelectric excitation pulled silicon micro-resonant pressure sensor chip and a preparation method thereof. The pressure sensor chip mainly comprises a sealed glass cover, aresonator layer, a pressure sensitive film layer, a stress isolation pad, a piezoelectric excitation element and a resistance vibration pick-up element. A composite structure of a pressure sensitivediaphragm and a resonator is adopted. For a second sensitive mode, the resonator layer comprises a resonant beam and a torsion beam. An extension part at one end of two adjacent resonant beams is connected to the same suspended torsion beam, and the other end is connected to a mass block. A coupling beam is arranged in the middle of the mass block. The resonator is connected to an anchor point through a connection point. A pressure guide hole is formed in the stress isolation pad, and the pressure is delivered to the rectangular pressure sensitive diaphragm under the guidance of the pressure guide hole to cause deformation. The deformation is amplified by the anchor point, and delivered to the resonator layer. Piezoelectric actuators and resistive vibration pick-up elements are respectively arranged on the outer surface of the resonant beam and the coupling beam. The piezoelectric actuators and the resistive vibration pick-up elements are connected with an external circuit through leads respectively.

The invention relates to the field of adjacent subsurface structure foundation pits construction, particularly to a foundation pit piled anchor dado concrete anchor cable top beam structure and a construction method thereof. The foundation pit piled anchor dado concrete anchor cable top beam structure is characterized by comprising slope protection piles, top beams, anchor cables and coupling beams and is an integral reinforced concrete structure comprising two rows of slope protection piles, wherein the two rows of slope protection piles arranged at intervals are arranged on two the side walls of two foundation pits respectively; a pre-stressed anchor is arranged between every two adjacent slope protection piles; waist rails used for reinforcement are arranged between the two rows of slope protection piles; pile heads at the top of each row of slope protection piles are connected together through the top beams made of reinforced concretes; the top beams on the slope protection piles in the foundation pits are connected through the coupling beams; the anchor cables are arranged in the coupling beams; the two ends of the anchor cables are connected with the top beams through base plates and anchorage devices. Compared with the prior art, the foundation pit piled anchor dado concrete anchor cable top beam structure has the following advantages: as the two rows of slope protection piles form a steady and firm slope protection system through the anchor cables, the safety of a soil body between two structures is ensured, the construction working plane and transport corridor are increased, the excavated volume and backfill volume are reduced, the construction period is greatly shortened, and the cost is reduced.

The invention discloses a method for shoring a prestressed double-row-pile strong-constraint deep foundation pit and belongs to the technical field of civil engineering construction. The method comprises that two rows of reinforced concrete cast-in-place piles are arranged successively on the periphery of the foundation pit to be excavated, one row of reinforced concrete cast-in-place piles, which are close to the foundation pit, serve as front row piles, and the other row of reinforced concrete cast-in-place piles, which are close to existing buildings, serve as rear row piles; front row piles are formed through concrete pouring of reinforcing cages, and rear row piles are formed through concrete pouring after binding and planting prestressed anchor cables and reinforcing cages into pile holes; one ends of prestressed anchor cables, which are close to the ground, are anchor cable free sections, and anticorrosion is conducted on outer surfaces through grease, thin films and bellows, so that prestressed anchor cables can extend and retract freely; and prestressed anchor cables and reinforcing cages are bound and placed into pile holes through anchor cable anchoring sections at the other ends before grouting, front row pile top beams, rear row pile top beams and coupling beams are poured, and anchor cable anchoring pads which exert the prestressing force on prestressed anchor cables are arranged on rear row pile top beams. By the aid of the method, the horizontal stiffness and the pit overturning stability of a shoring structure can be improved, and security coefficients of peripheral buildings can be improved.

A laser scanning microscope with an AOTF in the laser input-coupling beam comprises a temperature gauge provided in the environment of the AOTF or in the vicinity thereof or connected therewith. A laser scanning microscope with an AOTF in the laser input-coupling beam path comprises that the AOTF and / or its environment are / is heated or cooled.

The invention provides an adjustable coupling beam joint seismic energy dissipating device and a seismic coupling beam joint. The energy dissipating device comprises acorbel bracket and an energy dissipating piece. The corbel bracket is used for being matched with and installed on a steel column of the coupling beam joint. The corbel bracket comprises a plurality of inserting slots which are parallel to the steel column and formed at intervals. The energy dissipating part comprises a plurality of energy dissipating plates arranged side by side at intervalsand atop plate arranged at the top ends of the energy dissipating plates. The energy dissipating plates are correspondingly arranged in the inserting slots in a clamped mode. The lower part of each energy dissipating plate is inserted into the corresponding inserting slot. Each energy dissipating plate is provided with an enlarged energy dissipating part which is exposed to the exterior of the corresponding inserting slot. The top plate isused for being matched with and installed on the lower portion of a steel beam of the coupling beam joint. The time point of entering into a plastic energy dissipating state of the enlarged energy dissipating part is controlled by adjusting the slot width of the inserting slots. The adjustable coupling beam joint seismic energy dissipating device solves the problems that the energy dissipating performance of an existing seismic energy dissipating device is general, and repairing after the earthquake is difficult, and the performance and disassembly work of the energy dissipating device are further improved.

The invention relates to a scanning and transceiving integrated remote sensing measuring device and method for motor vehicle exhaust based on TDLAS-based (tunable diode laser absorption spectroscopy-based). Emergence wavelength of lasers covers target absorbing peaks of gas under test through temperature and current control of the lasers; a free light output multi-wavelength coupling unit provideshigh coaxiality or superposition of multiple beams; the coupled beam gains transceiving integration and beam scanning through an off-axis parabolic mirror and a rotating hexahedral reflector; the rotating hexahedral reflector enables the coupled beam to scan exhaust emission plumes and reach strip reflecting stickers on a ground; the transceiving integrated structure focuses light, reflected by the reflecting stickers, to a detector; a detector signal is received and processed by an acquisition processing unit so as to exhaust emission information; the device also includes a wavelength locking unit that locks wavelength of each laser in real time; frequently calibrating a system is not required. The device has high sensitivity and high spectral definition, and is suitable for real-time efficient measurement of exhaust emission.

A trailer mounted deer stand including a vertical tower attached to the chassis of the trailer and a pivotally mounted blind rotatable from a lowered, travel position to an upright, operational position for observation at spectator events including hunting. The trailer includes an extended tongue, through the trailer chassis and rearward to clear the lowered blind and a coupling beam disposed in an upwardly open channel mounted on the tongue, the coupling bean at one end attachable to an immoveable object such as a tree and at the other end coupled to a lifting boom attached to the blind. Upon securing the coupling beam to the immoveable object, and moving the trailer forward and away from the immoveable object, the relative movement of the coupling beam on the tongue causes the lifting boom to move upwardly toward the blind whereby it may be moved to the upright position. In its preferred embodiments, the mobile deer stand may include a ramp and platform for loading and carrying an all terrain vehicle and a locker for storage of hunting gear.