135results about How to "Increase asymmetry" patented technology

The invention relates to a lining-reinforced hollow fiber membrane tube as well as a preparation device and preparation method thereof, belonging to the field of preparation of polymer hollow fiber microporous membranes. In the membrane tube, a film forming chimney is designed reasonably, a coating layer on a braided tube led from a coating machine is subjected to controllable steam diffusion-induced phase inversion firstly, and then enters a coagulating bath, so that an open-pore surface skin layer with high porosity is formed on a film separation layer, and the radial direction of the membrane layer is in an integral asymmetric and interpenetrating cell-shaped structure; a composite material is selected to prepare a transition layer, so that the transition layer has excellent adhesive force and hardness, excellent compatibility with a surface separation layer and tiny cubical contraction in a phase conversion process at the same time; optimized braided tube size and braiding densityare selected to ensure that the braided tube has lower flexibility; and a method capable of maintaining reasonable roundness and the like in the production process ensures that the lining polyvinylidene fluoride (PVDF) hollow ultrafiltration membrane tube has the advantages of integral asymmetric structure with high integrity, high-porosity surface separation layer, higher back pressure enduring capability and the like.

The invention discloses a novel phthalonitrile resin and a preparation method thereof. Compared with a conventional phthalonitrile resin (only 4-nitro phthalonitrile as an end-capping reagent, the novel phthalonitrile resin is introduced with 3-nitro novel phthalonitrile resin to cooperate end capping, and thus the asymmetry of a resin structure is increased and the turbidity of a resin component is increased (see a formula 1). Compared with the conventional phthalonitrile resin, the novel phthalonitrile resin disclosed by the invention has the characteristics of low melting temperature, good solubility, wide processing window, low curing temperature and the like; a prepared resin molded part and a resin-based composite material are low in porosity, excellent heat-resistant quality, and high in mechanical property, and can be applied to the fields of aerospace, a space technology, machine manufacturing, and the like as a light-weight and high-temperature resistant part. The formula is described in the specification.

An MR element includes an MR part and upper and lower shield layers in a CPP structure. The MR element has side shield layers so as to interpose the MR part between the side shield layers in a track width direction. The MR part comprises a nonmagnetic intermediate layer and first and second ferromagnetic layers so as to interpose the nonmagnetic intermediate layer between the ferromagnetic layers. Each of the upper and lower shield layers has an inclined magnetization structure such that its magnetization is inclined relative to the track width direction. The side shield layers are magnetically coupled with the upper shield layer, respectively. The second ferromagnetic layer is indirectly magnetically coupled with the lower shield layer via an exchange-coupling functional gap layer. The side shield layer applies a bias magnetic field to the first ferromagnetic layer; and magnetizations of the first and second ferromagnetic layers are substantially orthogonal.

The invention relates to a closed loop control circuit for ultrasonic motor. A positive inversion unbalanced compensation circuit for ultrasonic motor is equipped between the output terminal of the isolated electrode voltage and the frequency controller. According to that the control error of the frequency controller is equal to the given value minus isolated electrode voltage feedback value, adjusting the feedback value or the given signal value to make the control error of the frequency controller close when the motor is in positive inversion can change output frequency of the frequency controller, making the ultrasonic motor have close rotational speed in positive inversion under control of subsequent circuit. The compensation circuit comprises a rheostat with the two ends respectively connected with a gating branch. The adjustable terminal of the rheostat is connected with the output terminal of the rectifier filter processing circuit. A power supply is series-connected with the adjustable terminal of the rheostat via a DC bias resistor, and then connected with the positive input terminal of the operational amplifier, controlling the corresponding gating branch and conducting voltage dividing by positive inversion control signal. The operational amplifier in frequency controller can figure out different signal value, making frequency controller output close control signal.

There is provided an illumination device (100) comprising: a substrate (104); an optically transmissive first layer (106) arranged on the substrate; a photon emitting layer (108), arranged on the optically transmissive first layer and comprising a photon emitting material configured to receive energy from an energy source and to emit light having a predetermined wavelength; a periodic plasmonic antenna array, arranged on the substrate and embedded within the first layer, and comprising a plurality of individual antenna elements (114) arranged in an antenna array plane, the plasmonic antenna array being configured to support a first lattice resonance at the predetermined wavelength, arising from coupling of localized surface plasmon resonances in the individual antenna elements to photonic modes supported by the system comprising the plasmonic antenna array and the photon emitting layer, wherein the plasmonic antenna array is configured to comprise plasmon resonance modes such that light emitted from the plasmonic antenna array has an anisotropic angle distribution; and wherein the photon emitting layer is arranged at a distance from the antenna array plane corresponding to a location of maximum field enhancement for light out-coupling resulting from the plasmonic-photonic lattice resonances.

The invention relates to asymmetric-structure modified epoxy acrylic resin and a continuous method synthetic method. The continuous method synthetic method comprises the following steps: causing an acrylic acid monomer and epoxy resin to react to prepare epoxy acrylic resin; adding a modified monomer and anhydride into a reaction system at one time, controlling temperature and reaction time, and preparing the asymmetric-structure modified epoxy acrylic resin; adding active diluting monomer to regulate viscosity, and discharging. The epoxy acrylic resin module prepared with the continuous method synthetic method has an asymmetric structure, can be applied to various photocuring coatings and ink products, especially photocuring optical fiber coatings and has the advantages of low finished product viscosity, high curing speed and good surface drying performance. A solidification membrane simultaneously has high modulus and toughness. The preparation method is simple in technology and can be used for continuous production, production efficiency is improved, and production cost is saved.

A method for digital processing of vibration signals from rolling bearings in rotating machines is presented, allowing subsequent fault detection with high reliability. A linear, adaptive filter is applied to the acquired vibration signal and iteratively tuned to increase the statistical asymmetry of its output. In this process, the filter removes phase- and amplitude distortion from underlying fault impulses. Furthermore, suppression of sinusoidal disturbances is simultaneously achieved with high robustness to measurement noise. The result is a processed signal from which rolling bearing defects are more easily detected.

The invention discloses a dual-polarization broadband weak coupling feed source array and relates to a phase array feed source receiver in the radio astronomy field. The dual-polarization broadband weak coupling feed source array can be used in feed sources of reflector antennasin the field of communication, observing and control and monitoring. According to the distribution rules of a reflector antenna focal plane field, a hexagonal reflection back cavity vibrator is distributed in a hexagonal small-space distribution mode to form a feed source array, so that energy receiving is facilitated, sampling of a focal plane field distribution is met, and good broadband characteristics and weak array coupling can be achieved. The hexagonal reflection back cavity vibrator comprises a radiator, a coaxial feeder, a hexagonal reflection back cavity and a matching disc, wherein the reflection back cavity adopts a small hexagonal structure, and array forming is facilitated.

A tuning fork-type crystal vibrator is provided that has improved CI and shock resistance. The tuning fork-type crystal vibrator includes a tuning fork-shaped crystal element made of a pair of tuning fork arms having grooves in their principal surfaces, and a tuning fork base portion from which the pair of tuning fork arms extends, an outer shape of the tuning fork-shaped crystal element being processed by etching. The tuning fork-type crystal vibrator has a protrusion, formed due to anisotropy of said etching, on a +X surface of the lateral faces of the tuning fork-shaped crystal element, and a first slanted portion rising from a −X direction in a +X direction formed in a tuning fork slit. A tip of the tuning fork slit on a principal surface side is shifted in +X direction from a center line bisecting the tuning fork-shaped crystal element in a width direction to a position at which tuning fork vibrations of the pair of tuning fork arms are balanced.

The invention discloses a magnetorheological damper with a multi-piece piston and a single rod. The magnetorheological damper consists of a working cylinder, an external electromagnet, a compensating air bag, the multi-piece piston and a piston rod, wherein the multi-piece piston consists of three or more groups of dynamic pieces; each group of dynamic piece has a circular ring form, and consistsof a strip flat plate which has a round hole in the center and two semicircular arc flat plates; the circular ring form is formed by respectively connecting one semicircular arc flat plate to one of two parallel straight edges of the strip flat plate which has the round hole in the center by a hinge; the outer diameters of the dynamic pieces are smaller than the inner diameter of the working cylinder; the flowing gaps of magnetorheological liquid are left; the groups of dynamic pieces of the multi-piece piston are fixed at one end of the piston rod at certain intervals through the round holeson the dynamic pieces; the other end of the piston rod is stretched out of the working cylinder through a sealing device and a bearing on the end face of the working cylinder; the compensating air bag is arranged at the bottom in the working cylinder; the external electromagnet is fixed on the external circumference of the working cylinder; the working cylinder is made of a magnetically-nonconductive material; and the magnetorheological liquid is fully filled in the working cylinder.

The invention provides a rotor assembly and a permanent magnet motor. The rotor assembly comprises a rotor iron core (1); a plurality of mounting grooves (2) are formed at intervals on the rotor iron core (1) along the circumferential direction; permanent magnets (3) are arranged in the mounting grooves (2); facing the outer peripheral edge of a rotor, each permanent magnet (3) is the same in polarity; the adjacent mounting grooves (2) are separated by soft magnetic materials; first air grooves (4) are formed between both ends of the mounting grooves (2) and the adjacent soft magnetic materials in the circumferential direction of the mounting grooves (2); two second air grooves (5) are formed at one side of each mounting groove (2), which is close to the rotor iron core (1); and one second air groove (5) is formed at a first end of each mounting groove (2), the other second air groove (5) is formed at the second end of the mounting groove (2), and two air grooves extend oppositely. According to the rotor assembly provided by the invention, a large magnetic flux density can be formed in an air gap, motor output is improved, motor efficiency is promoted, and torque fluctuation in the operating process of the motor can be reduced.

The invention discloses a single-rod magnetorheological damper with a one-way channel, comprising a working cylinder, a piston, a piston rod and a piston rod volume compensating device, wherein the working cylinder is filled with magnetorheological fluids; a shaft center positioned on one end of the piston is provided with a large hole for communicating the magnetorheological fluids, and the periphery of the piston rod positioned on the other end of the piston is provided with more than two small holes communicated with the large hole; and a one-way valve is arranged on the opening of the large hole of the piston or in the large hole of the piston. Damping force generated by the single-rod magnetorheological damper with the one-way channel has higher asymmetry due to the one-way channel for flowing the magnetorheological fluids.

The invention belongs to the technical field of magnetic storage, in particular to a perpendicular magnetic spin valve with a nano soft magnetic core. In the structure of the spin valve, a magnetic reference layer and a free layer respectively adopt a [Co / Pt] multi-layer membrane structure and a [Co / Ni] multi-layer membrane structure with perpendicular magnetic anisotropy. A [NiFeCo] nano soft magnetic core with planar magnetic anisotropy is added in the free layer used for information storage through micro preparation or doping. The area of the nano core can be controlled to be 2-12 percent of the total area of the free layer without influence on signal storage. The micro-magnetic simulation of the nano spin valve device shows that compared with the ordinary perpendicular magnetic spin valve, the magnetization reversal current of the perpendicular magnetic spin valve with the nano core is greatly reduced, the reduction amplitude is up to 56.9 percent, the reversal time is reduced by 65.1 percent, and the strength asymmetry of the critical reversal current is greatly improved simultaneously. Therefore, the invention has significant application value in the research and development of the power-saving, self-spinning, high-capacity and rectangular magnetic random access memory MRAM.

The invention provides an adjustable limiting ring used for a plasma processing device. The limiting ring is used for controlling discharge of redundant gas in a manufacturing process and neutralizing redundant charged particles; at least a baffle is arranged below the limiting ring; the baffle is parallel with the limiting ring and is at least partially overlapped with the limiting ring in the vertical direction; and the baffle is provided with a plurality of discharge channels. The adjustable limiting ring used for the plasma processing device can improve regional asymmetry in the plasma manufacturing process, and further improve non-uniformity of the manufacturing process of substrates.

A servo pattern is positioned in a DC erased portion to which a DC erase process has been performed, and recording tracks and track groove portions (discrete portions) are positioned in an AC erased portion to which an AC erase process has been performed. The track groove portions extend in a circumferential direction. The AC erased portion and the DC erased portion are both made of a magnetic material. In the servo pattern, four lines of preamble portions extending almost in a radial direction are formed and a plurality of pit portions disposed in a dotted manner in two lines are arranged. The pit portions are positioned rearward of the preamble portions in respect of a scanning direction of a magnetic head.

The invention relates to a single-phase brushless motor and an electric tool. The motor comprises a stator and a rotor, wherein the rotor can rotate relative to the stator, the stator comprises a stator magnetic core and a winding, the stator magnetic core comprises a yoke part and at least two teeth, the at least two teeth inwards extend from the yoke part, each tooth comprises a tooth body and a tooth crown, the tooth crown is arranged at a tail end of the tooth body and comprises a first pole shoe and a second pole shoe, the first pole shoe and the second pole shoe respectively extend towards two sides, the rotor is accommodated in a space encircled by the first pole shoes and the second pole shoes of the at least two teeth, a positioning groove is formed between the first pole shoe and the second pole shoe of each tooth and faces the rotor, the positioning groove is biased towards the first pole shoe, so that a pole surface of the second pole shoe facing the rotor is larger than a pole surface of the first pole shoe facing the rotor. The single-phase motor is relatively large in starting torque and high in starting capability, the starting capability of the single-phase motor facing a direction is higher than the starting capability of the single-phase motor facing another direction, and the single-phase motor is particularly applicable for application occasions such as the electric tool.

A pneumatic radial tire has a carcass and a tread. The carcass has at least one carcass reinforcing ply and opposing bead portions. Each bead portion has a bead core and a bead apex radially. The apexes in each bead portion having the same radial height (HA), as measured from a bead base line (B). The tire has a bead reinforcing ply comprising chopped carbon fiber in the amount of 0.5 to 30 parts per hundred rubber located in only one bead portion of the tire, with the bead reinforcing ply being adjacent to the carcass reinforcing ply.

In a DRAM memory circuit, the sense amplifiers, for amplifying the differential voltage sensed between the cores of a bit line, in each case contain two transistor circuits, each of which has two switching transistors. The first transistor circuit pulls the lower potential of the sensed differential voltage down to a defined low logic potential. The second transistor circuit pulls the higher potential up to a defined high logic potential. According to the invention, all the transistors in the sense amplifier are field-effect transistors of the same conduction type, in the case of which the channel is at low impedance if the gate potential is higher than the source potential at least by the amount of the threshold voltage Vth. The second transistor circuit may contain, for each of its two switching transistors, in each case a pump circuit in order to boost the gate of that switching transistor which is intended to pull up the higher logic potential to a potential which is higher than the high logic potential by at least the amount of the threshold voltage Vth.

The invention relates to the technical field of organic materials, and provides an organic compound as well as an electronic element and an electronic device using the same. The structure of the organic compound is composed of a chemical formula I and a chemical formula II. When the organic compound is used for a light-emitting layer of an organic electroluminescencedevice, the efficiency of the device can be effectively improved, and the service life of the organic electroluminescence device is prolonged.

The invention discloses an erbium-doped yttrrium lanthanum oxide luminescent material and a preparation method thereof. The molecular formula of the luminescent material is (ErxY1-x-yLay)2O3, wherein 0<x<=0.05, 0.08<=y<=0.1. A low temperature gel-combustion method is used for preparing the erbium-doped yttrrium lanthanum oxide luminescent material, and the method comprises: a polymerization gelation of a nitrate solution and an incendiary agent, a low temperature spontaneous combustion of a gel and a high temperature calcination of a precursor. The erbium-doped yttrrium lanthanum oxide luminescent material has a good optical performance; because La<3+> is introduced, green upconversion fluorescence and 1.5-1.6 [mu]m near infrared emission intensity are simultaneously and substantially improved; the material is an ideal luminescent material and has the advantages of good chemical stability and heat stability, non-toxicity and non-radiation; the material can be applied in the fields of display, temperature sensor, biomarker, medical monitoring, high-precision measurement, etc.

The present invention provides a reinforcement ring (10) for capsules for obtaining beverages, for example espresso coffee, comprising a side wall (1) and a flat surface, preferably having a uniform thickness (2), protruding from the side wall (1), wherein the side wall (1) and the protruding flat surface (2) are made in a single body and wherein the side wall (1) comprises reduced thickness areas (3), so as to reduce the total amount of material used for the production of the ring. A capsule for obtaining beverages

A liquid crystal display device includes a liquid crystal display panel to which an OCB mode is applied, and an optical compensation element which optically compensates a retardation of the liquid crystal layer in a predetermined display state in which a voltage is applied to the liquid crystal layer. The optical compensation element includes a polarizer, a first retardation plate which is disposed between the polarizer and the liquid crystal display panel and in which discotic liquid crystal molecules are fixed in a state in which the discotic liquid crystal molecules are hybrid-aligned along a normal direction, and a second retardation plate which is disposed between the polarizer and the first retardation plate and has wavelength dispersion characteristics which are opposite to wavelength dispersion characteristics of an in-plane retardation in the liquid crystal layer.

A tuning fork-type crystal vibrator is provided that has improved CI and shock resistance. The tuning fork-type crystal vibrator includes a tuning fork-shaped crystal element made of a pair of tuning fork arms having grooves in their principal surfaces, and a tuning fork base portion from which the pair of tuning fork arms extends, an outer shape of the tuning fork-shaped crystal element being processed by etching. The tuning fork-type crystal vibrator has a protrusion, formed due to anisotropy of said etching, on a +X surface of the lateral faces of the tuning fork-shaped crystal element, and a first slanted portion rising from a −X direction in a +X direction formed in a tuning fork slit. A tip of the tuning fork slit on a principal surface side is shifted in +X direction from a center line bisecting the tuning fork-shaped crystal element in a width direction to a position at which tuning fork vibrations of the pair of tuning fork arms are balanced.

A sine-wave current line-start three-phase rare-earth permanent magnet synchronous motor includes a motor shaft, a rotor and a stator. The rotor is disposed inside the stator and rotates around the motor shaft. The rotor includes P pairs of poles. Each pole includes a polar arched surface. A planar surface is formed between adjacent polar arched surfaces. Thus, a non-uniform air gap is formed between the pole face of the rotor and the inner circumferential surface of the stator. By the use of a salient-pole structure with the non-uniform air gap, the asymmetry of the magnetic circuit caused by permanent magnets can be offset, thereby making the manufacturing process of the rotor simplified, the negative sequence components of the rotor current during the line starting process reduced significantly, the starting performance improved, the sine-wave current provided during the operating process, the harmonic loss reduced, and the motor efficiency enhanced.

The invention discloses a preparation method of a flexible single-layer nano-film memristor. Holes and ionized oxygen ions generated by the single-layer nano-film memristor under a bias voltage are utilized as charge carriers; and the change principle of the resistance of a device is achieved by change of output of the holes and the ionized oxygen ions, so that a relatively low calcination temperature is combined by omitting a pre-sintering step of a ceramic material of a resistance film and selecting a raw material with a lower nano ceramic sintering temperature from two aspects of simplification of the preapration technology and chemical formulation of the nano ceramic material of the resistance film; B-site substitution is carried out by partially replacing Ti<4+> with X<2+>; the asymmetry of the molecular structure and the hole quantity in the resistance film are increased; by a series of technical means of coating a green tape to form a 'flexible' lower electrode and the like, the preparation technology is simplified; the technological process is shortened; the production efficiency is improved; the production energy consumption and the manufacturing cost are reduced; and the memristive property of the memristor is greatly improved.

A pneumatic radial tire has a carcass and a tread. The carcass has at least one carcass reinforcing ply and opposing bead portions. Each bead portion has a bead core and a bead apex radially. The apexes in each bead portion having the same radial height (HA), as measured from a bead base line (B). The tire has a bead reinforcing ply comprising carbon fiber reinforcing cords located in only one bead portion of the tire, with the bead reinforcing ply being adjacent to the carcass reinforcing ply.

The invention discloses a compound taking a dibenzo five-membered heterocyclic ring as a core and an application thereof, and belongs to the technical field of semiconductors. The structure of the compound provided by the invention is shown as a general formula (1) or a general formula (2), the compound provided by the invention contains a dibenzo five-membered heterocyclic parent nucleus structure, and has appropriate HOMO and LUMO energy levels, a relatively high triplet state energy level (T1) and a relatively low dipole moment. After the compound is applied to an OLED device, the luminousefficiency of the device can be effectively improved, and the service life of the device can be effectively prolonged.