91results about How to "Simple feeding method" patented technology

The invention discloses a conformal low-sidelobe waveguide slotted array antenna. The antenna is characterized by comprising a radiation rectangular waveguide array, a feed rectangular waveguide and a coaxial feed unit; the wide side of the radiation rectangular waveguide array is vertical to the wide side of the feed rectangular waveguide; bias radiation slots are formed in the wide side of the radiation rectangular waveguide array in the top, and inclined coupling slots are formed in the wide side of the feed rectangular waveguide; and the end portion of the feed rectangular waveguide is provided with a coaxial feed interface. Feed includes two levels; in the first level, coaxial cables in the bottom feed the feed rectangular waveguide in the middle; and in the second level, the feed rectangular wave uses the inclined coupling slots thereof to feed the radiation rectangular waveguide array, and the bias radiation slots serve as an antenna radiation array plane to complete antenna radiation. According to index requirements for the anti-interference capability of antennas and sensitivity of micro signals, the antennas characterized by being easily conformal, low in sidelobe, high in gain, easy to design, compact in structure and the like are designed.

A technique for producing coal natural gas by utilizing crushed coal slag through gasification includes that part of crude coal gas containing CH4 produced by crushed coal slag through gasification receives sulfur tolerant shift, the other part of crude coal gas is conveyed in a sub-line and converges with the gas after sulfur tolerant shift to be cooled, the cooled gas is purified to remove CO2,H2S, naphtha and H2O and other impurities to obtain synthesis gas meeting the methane synthesis H / C ratio, the synthesis gas performs methane synthesis under the effect of methane conversion catalyst, and the methane-synthesis natural gas (SNG) is transmitted in long-distance pipeline network after compression and drying. The invention has the advantages of high gasification rate, high gasification intensity, low consumption and low water content of coal gas.

The invention provides a wire labelling mechanism and method, which relate to the technical field of automatic wire labelling. The wire labelling mechanism comprises a feeding mechanism, a material belt guiding mechanism, a stepping detector, a material belt separating mechanism, a power mechanism, a wire fixing frame, a folding mechanism, a control module and a rack, wherein the feeding mechanism, the material belt guiding mechanism, the material belt separating mechanism and the power mechanism are sequentially fixed at the upper end of the rack along a material belt feeding direction; the stepping detector is arranged between the material belt guiding mechanism and the material belt separating mechanism, and the detection end of the stepping detector is opposite to the labelled surface of a material belt; the wire fixing frame is arranged above the material belt separating mechanism; the folding mechanism is arranged above the wire fixing frame; and the control module is arranged in the rack and connected with the power mechanism, the folding mechanism and the stepping detector respectively. According to the wire labelling mechanism and method, mechanical steps for labelling are simplified, the structure of the mechanism is simplified, and the labelling speed is enhanced; and moreover, the mechanism is simple to locate and low in adjusting difficulty.

The invention relates to a satellite-borne K-band phased array antenna circularly-polarized waveguide radiation array, which can radiate microwave signals to the space, and can receive microwave signals from the space. The satellite-borne K-band phased array antenna circularly-polarized waveguide radiation array is composed of a plurality of antenna units, wherein each antenna unit comprises a matching diaphragm, an SMP coaxial feed socket, a square waveguide radiator, a waveguide-to-coaxial adapter, an SMP feed socket feed end, an impedance matching device and a circular polarizer, and adopts an integral design; and the matching diaphragms are adopted among the antenna units for deploying coupling characteristics among radiating units, so as to achieve more ideal standing wave performance and radiation characteristics. The satellite-borne K-band phased array antenna circularly-polarized waveguide radiation array is simple and reliable in structure, has the advantages of two-directional plus / minus 40-degree wide angle scanning, low sweep gain drop and excellent circular polarization characteristics, and satisfies the requirements for an phased-array antenna of satellite-borne intersatellite and satellite-to-ground communication. The antenna adopts an aluminum structure, and performances of the antenna are not affected by factors such as elemental oxygen corrosion and ultraviolet radiation of the on-orbit space environment.

The invention discloses a multi-station sheet loading device and a punching production line. The multi-station sheet loading device comprises a frame, a manipulator, and at least two emptying mechanisms arranged on the frame for placing sheets; the manipulator comprises a main body, a rotating arm rotationally arranged at the upper part of the main body, and a sucker arranged at the tail end of the rotating arm; a rotary driving mechanism for driving the rotating arm to rotate is arranged in the main body; the rotating arm is provided with a taking driving mechanism for driving the sucker to vertically move; each emptying mechanism is arranged on the trajectory of rotating the sucker along the rotating arm; the rotary driving mechanism can drive the rotating arm to switch the sucker between the upper side of one emptying mechanism and a target position; and the taking driving mechanism drives the sucker to vertically move to take materials on the emptying mechanisms. Compared with theprior art, the multi-station sheet loading device switches the taking position between two emptying mechanisms through modes of the sucker vertically lifting sheets and the rotating arm rotating the sucker, so that the taking position switching mode is fast, the loading mode is simple, the overall structure occupied space is less, and the production cost is low.

The invention provides an active frequency selective surface structure based on a varactor diode, comprising a dielectric plate, and a top metal layer and a bottom metal layer respectively arranged onthe upper surface and the lower surface of the dielectric plate; the dielectric plate is provided with a metal through hole penetrating the dielectric plate and communicating with the top metal layerand the bottom metal layer; the bottom metal layer comprises a first metal sheet vertically centrally arranged, and two second metal sheets symmetrically arranged along the first metal sheet, and thesecond metal sheets are horizontally centrally distributed; the top metal layer comprises a center metal sheet and four metal sheets arranged around the center metal sheet and distributed symmetrically in the center. A metal gap is for between two adjacent metal sheets, and a varactor diode is load between that metal gaps. The structure is based on the load of a varactor diode, simple in structure, simple in feeding mode, adjustable in resonant frequency and wide in moving range, and keeps the insensitivity of resonant frequency to polarization, so the structure is suitable for complex electromagnetic environment.

The invention belongs to the technical field of materials, and in particular relates to an ultra-wideband switching absorber based on a PIN diode. The absorber comprises a microwave absorption layer,a switching layer and a bottom plate layer in order from top to bottom; the microwave absorption layer is formed by a first dielectric substrate and a plurality of open resonant ring structures periodically attached to the upper surface of the first dielectric substrate; the switching layer is formed by a second dielectric substrate, a plurality of metal horizontal strips attached to the upper surface of the second dielectric substrate and loading a diode and a plurality of metal vertical strips attached to the lower surface of the second dielectric substrate and loading the diode, wherein themetal horizontal strips are parallel to one another, the metal vertical strips are parallel to one another, and the metal horizontal strips and the metal vertical strips are mutually vehicle in the space direction; and the bottom plate layer is a metal material layer. The ultra-wideband switching absorber based on the PIN diode achieves ultra-wideband microwave absorption from S wave band to an Xwave band, and the working frequency band is wide in coverage; and the ultra-wideband switching absorber has partial frequency band switching feature, is simple in feed mode and has polarization independence.

The invention relates to a sintering and pelletizing powder receiving, storage and proportioning system, which comprises an ore storage bin, a feed inlet, a discharge outlet, a vibrator which is arranged at the discharge outlet and a quantitative tape feeding machine which is arranged below the discharge outlet. The sintering and pelletizing powder receiving, storage and proportioning system is characterized in that the ore storage bin is in a closed structure, a bag-type dust collector is arranged on one side of the top of the ore storage bin, the feed inlet is arranged in the middle of the top of the ore storage bin and is connected with a pneumatic conveying and feeding device, the pneumatic conveying and feeding device consists of a pneumatic conveying pipe unloading nozzle which is connected with the feed inlet, a metallic conveying pipe which is connected with the pneumatic conveying pipe unloading nozzle, a rubber hose which is connected with the metallic conveying pipe and a quick joint which is connected with the rubber hose, and a manual gate valve and a feeding valve which is connected with the manual gate valve are arranged at the lower part of the discharge outlet of the ore storage bin. The sintering and pelletizing powder receiving, storage and proportioning system has the advantages of simple structure, reasonable design, quick and controllable ash unloading, no environmental pollution, low maintenance rate, timely and accurate proportioning, low production cost and high economic benefit.

The invention discloses a small broadband dual polarized quadruple ridged horn antenna. Two pairs of orthogonally arranged exponential modulation sine gradient ridges are respectively inserted into avertical channel of a square reflection cavity after an interval is reserved and are compressed and fixed by virtue of a rectangular gasket, two SMA feed joints provided with a square flange plate aremisplaced up and down and orthogonally fixed at the middle parts of the outsides of two adjacent metal side walls of the square reflection cavity by virtue of set screws, an insulating medium vertically runs through the metal side walls of the square reflection cavity and insulating medium through holes in the exponential modulation sine gradient ridges and extends to the tail ends of gradient edges of the gradient ridges, and a straight inner conductor runs through the interior of the insulating medium and extends into a location hole in the exponential modulation sine gradient ridge at theother side opposite to the straight inner conductor. The antenna disclosed by the invention is mainly used in mobile and satellite communication equipment and even small unmanned aerial vehicle remotesensing monitoring radar equipment, dual polarized broadband earth observation is realized, the overall size is small, a feeding mode is simple, and broadband dual polarization requirement and multi-antenna high integration density use of the antenna can be well met.

The invention provides a packer and a packing method which are used for packing plate shaped objects in packing bags. The packer comprises a first conveying belt, a second conveying belt, a bag holder, at least one absorption nozzle, a slide rail and a bag clamping mechanism. The second conveying belt is contiguous to the first conveying belt and receives plate shaped objects conveyed by the first conveying belt; the bag holder is used for holding a plurality of packing bags; the absorption nozzle is arranged above the bag holder and used for absorbing and opening the openings of the packing bags; the slide rail is arranged between the bag holder and the second conveying belt; the bag clamping mechanism comprises a guide rod and two supporting arms; the guide rod is in slide fit with the slide rail; and the two supporting arms are respectively arranged at two ends of the guide rod and provided with clamping heads used for clamping the packing bags. The bag clamping mechanism clamps the packing bags to the second conveying belt from the bag holder along the slide rail, and the first conveying belt conveys the plate shaped objects to the packing bags.

The invention discloses an efficient synthesis technology of tenofovir alafenamide. The efficient synthesis technology comprises the steps that A, tenofovir reacts with triphenyl phosphite under an alkali catalysis condition to prepare tenofovir monophenyl ester, wherein the initial reaction temperature is 50-70 DEG C, the reaction temperature rises according to the gradient of 5-10 DEG C / h, and the total reaction duration is 6-10 h; B, the tenofovir monpohenyl ester is subjected to acylating chlorination to prepare tenofovir phenyl ester phosphoryl chloride; C, the tenofovir phenyl ester phosphoryl chloride is isomerized, then the isomerized tenofovir phenyl ester phosphoryl chloride reacts with an L-alanine isopropyl ester compound to prepare a target compound, wherein methylbenzene andother non-polar solvents are adopted for an isomerization solvent. The prepared tenofovir alafenamide has high purity and high yield, the technology operation is simple, the cost is low, complicated technology operation and purification means like using chiral resolution agents are omitted, and the efficient synthesis technology is very suitable for industrial production.

The invention provides a preparation method of alkyl borate. The preparation method comprises the following step: reacting by taking alkyl tosylate and bisdiboron shown as a formula I-a as raw materials under the action of a silver catalyst and alkali to obtain the alkyl borate shown as the formula I. According to the preparation method provided by the invention, commercially-available silver saltis directly adopted for participating into the reaction, a reaction system and a feeding mode are simple, and no ligand needs to be added. The used bisdiboron is insensitive to air and water and further is more convenient in actual application. The alkyl tosylate as the raw material can be conveniently prepared from alkyl alcohol and the raw material is wide in source; meanwhile, first-stage or second-stage alkyl borate is obtained by silver catalysis direct carbon-oxygen bond fission of the alkyl tosylate and the bisdiboron; the reaction has good functional group compatibility.

The invention provides a system and method for anaerobic digestion and biogas purification of waste fruits and vegetables. The system comprises five component parts including a charging unit, an anaerobic digestion unit, a biogas slurry filtering unit, a biogas residue drying unit and a biogas purifying unit. The system generates biogas through an anaerobic digestion process, and the generated biogas is used for drying biogas residue to prepare pellet fuel. The system further uses a technical system and method for preparing biogas through a hollow fiber membrane system. The system and method allow efficient conversion of waste and covert waste fruits and vegetables to biogas and pellet fuel through anaerobic digestion and a hollow fiber membrane separation system.

The invention relates to a preparation method of polycarbonate, belonging to the technical field of preparing high molecular material, in particular to a method for preparing polycarbonate through phosgene interface method; in the course of reaction, the flow of phosgene is controlled to correspondingly regulate the flow of alkaline solution, thus the pH value of the reaction system is controlled within a proper range so as to improve the reaction rate and the conversion efficiency of phosgene and bisphenol.

The invention discloses a synthesis method for preparing trisubstituted alkenes based on nickel catalysis. An alkyl halide compound and intramolecular alkynes are used as raw materials, and under theaction of a nickel catalyst, a ligand, alkali and silane, and reaction is carried out in a solvent according to the following equation, so as to obtain a trisubstituted alkene compound having a singleconfiguration. The trisubstituted alkenes synthesized by the method disclosed by the invention have very high regioselectivity and stereospecificity, and the trisubstituted alkenes in a single configuration can be completely obtained, thereby solving the problem of mixed alkene product separation. At the same time, a reaction system has a simple feeding way and does not need to use a metal reagent sensitive to moisture and air, so as to be more convenient in actual use. The alkyl halide compound can be synthesized directly from alkyl alcohol, the intramolecular alkyne has a wide source and iseasily available. The reaction conditions are mild, some alkali-sensitive groups are well compatible, and the functional group compatibility is excellent.

The invention provides a battery cell connecting assembly which comprises an end cover capable of being buckled at one end of at least one battery cell, the end, covered by the end cover, of the battery cell is provided with a positive tab and a negative tab, two pole pieces are arranged on the outer side of the end cover and connected with a bottom piece located on the inner side of the end cover, and the bottom piece can be welded and fixed with the positive tab or the negative tab. The invention further provides a lithium battery comprising the connecting assembly and an assembling method. The battery cell connecting assembly has the advantages that the bottom piece and the pole piece are connected together, so that the bottom piece and the pole piece are conveniently fixed with a pole lug of a battery cell, the pole piece and the bottom piece are directly fixed on the connecting assembly, the whole connecting assembly is directly operated during assembly, the pole piece and the connecting piece which are separately arranged do not need to be frequently sucked, equipment shutdown caused by multiple pieces and missing pieces is reduced, and the utilization rate is improved. And the tabs are fixed when the pole pieces are turned over, so that the condition that the tabs are inserted inwards is avoided.

The invention discloses a low-frequency oscillator and a multi-frequency antenna. The low-frequency oscillator comprises an oscillator arm, a balun and feed sheets, wherein the oscillator arm comprises two pairs of L-shaped metal bars, the two pairs of L-shaped metal bars are respectively arranged in a diagonal manner and are horizontally arranged in a cross manner, and the two pairs of L-shaped metal bars are connected with the two feed sheets in a one-to-one correspondence manner. The feed sheets are connected with a coaxial cable to feed the oscillator arm. As the cross section area of theL-shaped metal bars is small, the shielding of a high-frequency radiation unit can be effectively reduced, and the electrical interference between a high frequency band and a low frequency band is reduced to the maximum extent. Moreover, the cross-shaped arrangement mode is favorable for the embedment in the high-frequency radiation unit in the multi-frequency antenna, so that the structure is compact and the arrangement is flexible under the condition that the size of a reflection plate is not increased. Finally, the feeding sheets and the coaxial cable are connected to feed the oscillator arm, and a power divider is not needed, so the feeding mode is simple. In addition, the common multi-frequency antenna comprises the low-frequency oscillator, which has the effect as the above.

The invention discloses a satellite-borne circular polarization horn array antenna. An SMA coaxial feeder socket (1) comprises an SMA socket body and a through hole, the SMA socket body is mounted on an input variation section of a circular polarizer (2), a feeding probe extends from other surface of the SMA socket body, penetrates into a hollow square waveguide (7) and belongs to a coaxial-waveguide feeding end, the circular polarizer (2) is positioned in the middle of the hollow square waveguide (7), one end of the circular polarizer (2) is connected with the bottom surface of the square waveguide (7), the other end of the circular polarizer (2) is a free end, the height of the circular polarizer (2) is lower than that of the square waveguide (7), the bottom end of a square horn mouth (3) is connected at the top of the free end of the square waveguide (7) and belongs to a beam forming section, a bottom end short circuit board (5) is used for short-circuiting the bottom end of the square waveguide, a mounting bottom board (6) is perpendicular to the square waveguide and used for connecting an antenna unit, and an antenna array is fixed to a star. According to the antenna, the radiation efficiency of the antenna is improved, and light weight is achieved.

The invention discloses a slow wave structure based on plane surface plasmon polaritons, and relates to the technical field of microwave electric vacuum. The slow wave structure comprises a supportingbase and metal structures, and the metal structures are periodically arranged on the upper surface of the supporting base and comprise a first metal, a second metal and an intermediate metal. The first metal, the second metal and the middle metal are all of surface plasmon polariton structures, the middle metal is arranged between the first metal and the second metal, a certain distance is reserved between the first metal and the middle metal and between the second metal and the middle metal, and the first metal and the second metal are symmetrically distributed relative to the middle metaland are staggered with the middle metal. The slow-wave structure provided by the invention has a very high radial electric field under the condition of a certain propagation constant and power, so that the slow-wave structure has higher electronic coupling impedance, and can obtain the higher output power in a traveling wave tube / backward wave tube.

The invention discloses a double-frequency MIMO antenna with very high isolation. The antenna is composed of a rectangular insulating dielectric substrate, a radiating surface, a phase modulation network, a decoupling network, a matching network and a lower-layer metal grounding plate of an etching ground sinking structure. The antenna is composed of two symmetrical radiation units, the size of the antenna is reduced by adopting a branch bending meandering technology, each radiation unit is composed of two inverted L-shaped branches, and low-frequency (2.45GHz) radiation and high-frequency (5.8GHz) radiation are generated respectively. In a low frequency band, the phase modulation network and the inverted T decoupling network are introduced to improve the isolation degree between double antennas; and in a high frequency band, the isolation degree of the high frequency band is improved through a structure shaped like a Chinese character 'shan'. The double-frequency impedance matching network is connected to adjust the reflection coefficient of the double frequency bands. The antenna can meet the requirement that the reflection coefficient (S11) is less than -15dB (S11<-15dB) withinthe frequency bands of 2.4-2.5GHZ and 5.75-5.86GHZ, the isolation degree (S12) is less than -20dB (S12<-20dB) within the frequency bands of 2.4-2.5GHZ and 5.75-5.86GHZ, and the omnidirectional radiation requirement is met. The antenna is low in cost, simple in structure, excellent in performance and capable of meeting the requirement of an existing dual-band mobile communication band at the same time.

The invention relates to the technical field of antennas for wireless communication, in particular to a broadband circularly -polarized end-on-fire antenna adopting a substrate integrated waveguide technology, which comprises a single-layer circuit board substrate formed by sequentially stacking an upper-layer metal surface 1, a dielectric substrate 3 and a lower-layer metal bottom surface 4 from top to bottom; and the single-layer circuit board substrate is provided with two columns of metalized via holes 5 to form a substrate integrated waveguide (SIW) structure. The upper end of the substrate integrated waveguide structure is a substrate integrated waveguide port 2 used for feeding the antenna radiation unit at the rear end. And the lower port of the substrate integrated waveguide structure is an end-on-fire antenna radiation unit. The broadband circularly-polarized end-on-fire antenna is simple in structure and convenient to manufacture and integrate into a circuit, and has the advantages of being wide in axial ratio bandwidth, impedance bandwidth and half-power lobe width and the like in a working millimeter wave frequency band.

The invention discloses a miniaturized dual-band circularly polarized antenna for loading electromagnetic meta-material. A radiation layer at a first radiation layer, an electromagnetic meta-material layer at a second layer, and a floor layer at a third layer commonly form a radiant panel of an antenna, wherein the electromagnetic meta-material layer at the second layer changes the relative dielectric constant and the relative permeability of this layer, so that the wavelength of the radiation electromagnetic wave in the meta-material medium is reduced, the antenna size is favorably reduced, the impedance characteristic is changed, and the bandwidth is favorably broadened; furthermore, the adding of a pentahedral metal back cavity can effectively shield the backward radiation and the external disturbance, and the directed radiation directivity requirement of the antenna is enhanced; the entire antenna is free from adding any matching network, the size of the antenna is only 60mm, and the relative bandwidth is 11.7%; the miniaturized dual-band circularly polarized antenna disclosed by the invention has the features of being double in bands, high in gain, miniaturized, good in directed radiation, and simple in feeding mode, and capable of satisfying the detection requirement of a missile-borne antenna; and meanwhile, the portable design requirement can be satisfied, the miniaturized dual-band circularly polarized antenna can be applied to other fields but not limited on the missile aircraft.

The invention provides a synthesizing method for preparing trisubstituted olefin by decarboxylation reaction. The synthesizing method is characterized in that alkyl carboxylic ester and aryl-alkyl acetylene are used as the raw materials, and generate reaction in a solvent according to the following reaction formula under the functions of a nickel catalyst, a ligand, alkaline and silane, so as to obtain a trisubstituted olefin compound with single configuration. The synthesizing method has the advantage that the alkyl carboxylic ester and the aryl-alkyl acetylene are used as the reaction primers, so as to overcome the limitation that only alkyl halide and alkyl sulfonic ester are used in the existing method for preparing the trisubstituted olefin by the alkyne hydrogen alkylation reaction.The trisubstituted olefin synthesized by the synthesizing method has the advantages that the area selectivity and stereo activity are very high the trisubstituted olefin with single configuration canbe completely obtained, and the problem of separating in mixed olefin products is solved; meanwhile, the material adding type of the reaction system is simple, the metal reagent sensitive to the waterand air is not used, and more convenience is realized in actual use; the source of the alkyl carboxylic ester is wide, and the synthesizing is simple.

The invention provides a roll forging machine, and belongs to the field of forging equipment. The roll forging machine comprises a machine body, a roll mechanism, a grabbing mechanism and a feeding mechanism. The roll mechanism comprises a first roll, a second roll and a first drive device, and the first drive device is used for driving the first roll and the second roll to rotate. The grabbing mechanism is arranged on the machine body, and used for grabbing a workpiece. The feeding mechanism and the grabbing mechanism are located at the two sides of the first roll and the second roll separately in the transversal direction. The feeding mechanism comprises a placement body, a second drive device and a push device, the placement body is movably arranged on the machine body, and used for placing the workpiece; the second drive device is used for driving the placement body to transversally move, so that the placement body is close to or away from the grabbing mechanism; and the push device is arranged on the placement body, and used for pushing the workpiece, so that the workpiece moves towards a direction close to the grabbing mechanism. The feeding mechanism of the roll forging machine is simple in structure, completes feeding in a translation manner, and is simple in feeding manner and high in feeding efficiency.

The invention discloses a microstrip line coupled feeding broadband circularly polarized eight-arm slot helical antenna, and relates to the field of satellite navigation. The microstrip line coupled feeding broadband circularly polarized eight-arm slot helical antenna comprises a grounding plate and a helical antenna main body fixed on the grounding plate. The helical antenna main body comprises adielectric layer which surrounds and is closed along the edge of the grounding plate; a metal layer is arranged on the outer surface of the dielectric layer; eight slot helical antennas are formed byhollowing out and slotting the metal layer and then forming grooves, and all the slot helical antennas uniformly surround the whole dielectric layer; and a microstrip feeder line is arranged on the inner surface of the dielectric layer and is connected with the grounding plate through a coaxial probe. According to the invention, the problems that the feeding mode of the helical antenna is complex, the gain bandwidth range is not enlarged greatly, and higher requirements cannot be met in the prior art are solved; and the invention provides the helical antenna which greatly enlarges the gain bandwidth range under the condition of miniaturization, realizes effective radiation and circular polarization through a simple feeding mode and can be applied to satellite navigation system terminal equipment.

The invention relates to a single-negative material ultra-slow waveguide-based miniaturized patch antenna. The traditional patch antenna is large in size and poor in radiation efficiency and directionality. The miniaturized patch antenna comprises a negative dielectric constant dielectric layer, a common dielectric layer, a metal horizontal plane layer and a coaxial feed probe, wherein the negative dielectric constant dielectric layer is arranged between the common dielectric layer and the metal horizontal plane layer; the upper surface of the common dielectric layer is coated with an ideal electric conductor; the area of the metal horizontal plane layer is greater than that of the bottom surface of the negative dielectric constant dielectric layer; and the coaxial feed probe penetrates the negative dielectric constant dielectric layer, the common dielectric layer and the metal horizontal plane layer and is vertical to the negative dielectric constant dielectric layer, the common dielectric layer and the metal horizontal plane layer. The antenna has the advantages of very small size, simple feed method, convenient large-scale manufacture and low cost.

The invention discloses turnover equipment and a turnover method suitable for plate processing, relates to the technical field of plate processing, and aims to provide the turnover equipment and the turnover method suitable for plate processing, which are used for clamping and fixing plates, improving the protection effect on the plates, facilitating plate feeding and reducing the working intensity of workers. The equipment is technically characterized by comprising a plate fixing mechanism, the plate fixing mechanism comprises two threaded transmission structures and four translation structures, and each threaded transmission structure comprises a double-end lead screw, a rotating motor and a connecting block. The protection effect on the plates is improved, meanwhile, the plates are clamped and fixed through mutual approaching of the translation mechanisms, it is guaranteed that the plates are evenly stressed through the structure, each plate can be clamped and fixed, binding through a rope is not needed, the stability of the plates can be guaranteed, and the plates are prevented from sliding off.

The invention relates to a production system applied to wooden photo frames. The production system comprises a frame, wherein a conveying belt is arranged on the frame; a cutting device is arranged onthe frame and is used for cutting raw materials into photo frame strips used for manufacturing photo frames; the frame along a conveying direction of the conveying belt is also provided with a feeding device, a detection device, a groove broaching device, an assembling platform and a hole broaching device. The production system has the advantages that the feeding device, the detection device, thegroove broaching device, the assembling platform and the hole broaching device are successively arranged on the frame in the conveying direction of the conveying belt; the cut photo frame strips areconveyed to the feeding device for feeding, the detection device for detection, the groove broaching device for groove broaching treatment, the assembling platform for assembling and forming and the hole broaching device for hole broaching treatment through the conveying belt; the feeding device is capable of feeding the photo frame strips one by one; the subsequent one-by-one detection of the detection device is facilitated; the detection quality is improved, so that assembly line operations of feeding, detecting, groove broaching, assembling and hole broaching are achieved; and the production process of the photo frames is simplified.

The invention relates to a feeding mechanism, which includes a correspondingly arranged and used feeding device and a rotatable feeding jaw device; the feeding device includes a bottom plate and a feeding trough plate arranged on the bottom plate . A detection device arranged on the base plate and used in conjunction with the feed trough plate; the feed chute plate includes a feed plate provided on the base plate with a feed chute, and A height-limiting positioning plate that is fixedly arranged on one side of the feed plate and covers 50% of the feed chute. A feeding mechanism and a feeding method thereof of the present invention have a simple feeding method for the water-controlled diaphragm, do not need to set an overturning mechanism and a rotating mechanism for auxiliary correction, simplify the structure of the automatic assembly equipment, and feed the water-controlled diaphragm High efficiency, thereby improving the production efficiency of water valve assembly.

The invention relates to compound preparation, belongs to the field of organic synthesis and discloses a synthesis method of aryl-substituted homoallylic alcohol. An aryl boron compound and alkenyl epoxy serve as raw materials to react in a solvent under the action of a copper catalyst, ligands and alkali, and thus an aryl-substituted homoallylic alcohol compound with E-configuration is obtained.The aryl-substituted homoallylic alcohol synthesized through the synthesis method has the advantages of short synthetic route, high reaction yield and the like, and the problems that the route of currently synthesizing the aryl-substituted homoallylic alcohol is long, the reaction condition is harsh and the total reaction yield is low are solved. Meanwhile, the feeding mode of a reaction system issimple, a reaction reagent is stable to air and water, and actual operation is more convenient. The reaction region and stereoselectivity are high, no by-product is generated, and separation is easy.Meanwhile, the reaction can be well compatible with certain sensitive groups, and functional group compatibility is superior.