Abstract: The present invention involves with a method of searchable public-key encryption, a system and server using the method.

Abstract: The invention provides a reticular fixation system and method for an articular cartilage. The system comprises an articular cartilage repair surface locator, a temporary fixation kirschner wire, a depth-control guide wire, a percussion device and a cartilage fixing piece. The method comprises: repositing an injured articular cartilage; placing a locator on a surface of the injured articular cartilage; fixing the locator to the articular cartilage and the bone temporarily; punching the fixing piece wire tunnels on the articular cartilage and the bone in a fixing piece guide channel of the locator; placing the fixing piece into a fixing piece wire guide channel; percussing a fixing piece nail into the tunnels of the articular cartilage and the bone; removing the temporary fixation kirschner wire; implanting a second fixing piece nail, and completing the articular cartilage repair. The invention can improve convenience and reliability of fixation of the injured cartilage.

Abstract: A modular injector includes a precursor channel assembly and a seal assembly; the precursor channel assembly includes a plate-shaped base, a precursor channel and a gas pipeline; the precursor channel is disposed on a front surface of the plate-shaped base and extends from top to bottom, and a top end of the precursor channel is communicated with the gas pipeline; the seal assembly is disposed on the front surface of the plate-shaped base. The modular injector includes a plurality of components to form an integral module, and shunts and buffers the introduced gas through the precursor channel to achieve uniform deposition. A device includes multiple modular injectors arranged at an interval, into which the oxidant precursor source and the organo-metallic source are respectively introduced, so that multiple stages of film are deposited on the substrate after the substrate moves for a round trip.

Abstract: A ferroelectric polymer electrocaloric nanowire array and a preparation method thereof, in which the ferroelectric polymer electrocaloric material is formed by a polyvinylidene fluoride (PVDF)-based ferroelectric polymer electrocaloric nanowire array embedded in a porous anodic aluminum oxide (AAO) template. The PVDF-based ferroelectric polymer electrocaloric material is controlled to form a nanowire array embedded in the porous AAO template, and through adopting of a solution infiltration method to prepare the ferroelectric polymer electrocaloric nanowire array in the porous AAO template and improvement of the key morphology, structure, internal microscopic connection construction of the ferroelectric polymer, problems, such as low electrocaloric strength of the ferroelectric polymer, difficult heat conduction in the electrocaloric material and low refrigerating power density of the electrocaloric device in the prior art, can be effectively solved.

Abstract: The present invention discloses POSS-based non-isocyanate polyurethane modified poly(propylene carbonate), comprising poly(propylene carbonate) and 1 to 20 wt % of POSS-based non-isocyanate polyurethane. The POSS-based non-isocyanate polyurethane has a structure shown by the formula (I) or the formula (II). Under the action of a catalyst, POSS-based epoxy compound is subjected to cycloaddition reaction with CO2 to obtain POSS-based cyclic carbonate, and then the POSS-based cyclic carbonate is subjected to ring-opening reaction with monoamino compound to prepare the POSS-based non-isocyanate polyurethane. POSS has both the flexibility of organic silicon materials and the strength of inorganic silicon materials to enhance the toughening and strengthening of of poly(propylene carbonate).

Abstract: A three-dimensional packaging structure and a packaging method of power devices. The packaging structure includes power devices, direct copper bonded substrates (i.e., DBC substrates), flexible printed circuit boards (i.e., FPC boards), bonding wires, heat dissipation substrates, decoupling capacitors, a heatsink with integrating the fan, shells, and forms a half-bridge circuit structure composed by the power devices. The power circuit structure is optimized, parasitic inductance in the commutation loop is reduced by mutual inductance cancellation, thus overvoltage and oscillation during the power device switching process can be reduced. Additionally, by using the flexible characteristic of the flexible PCB, a three-dimensional packaging structure is formed and power density is improved.

Abstract: An AC excitation synchronous condenser and a control method, an AC-excitation induction machine, a full-controlled AC excitation converter, a grid-side converter and a controller. The AC-excitation induction machine is the core power converting device, and its stator and rotor windings are AC windings with terminals. The controller is configured to control the full-controlled AC excitation converter to perform excitation and speed regulation on the AC-excitation induction machine and also control the grid-side converter to ensure the excitation capability of the full-controlled AC excitation converter, so that support and regulation of the active power and reactive power are achieved.

Abstract: A ferroelectric polymer electrocaloric nanowire array and a preparation method thereof, in which the ferroelectric polymer electrocaloric material is formed by a polyvinylidene fluoride (PVDF)-based ferroelectric polymer electrocaloric nanowire array embedded in a porous anodic alumimum oxide (AAO) template. The PVDF-based ferroelectric polymer electrocaloric material is controlled to form a nanowire array embedded in the porous AAO template, and through adopting of a solution infiltration method to prepare the ferroelectric polymer electrocaloric nanowire array in the porous AAO template and improvement of the key morphology, structure, internal microscopic connection construction of the ferroelectric polymer, problems, such as low electrocaloric strength of the ferroelectric polymer, difficult heat conduction in the electrocaloric material and low refrigerating power density of the electrocaloric device in the prior art, can be effectively solved.

Abstract: The present invention discloses an open-winding motor drive topology and a modulation method thereof.

Abstract: A three-dimensional packaging structure and a packaging method of power devices. The packaging structure includes power devices, direct copper bonded substrates (i.e., DBC substrates), flexible printed circuit boards (i.e., FPC boards), bonding wires, heat dissipation substrates, decoupling capacitors, a heatsink with integrating the fan, shells, and forms a half-bridge circuit structure composed by the power devices. The power circuit structure is optimized, parasitic inductance in the commutation loop is reduced by mutual inductance cancellation, thus overvoltage and oscillation during the power device switching process can be reduced. Additionally, by using the flexible characteristic of the flexible PCB, a three-dimensional packaging structure is formed and power density is improved.

Abstract: An AC excitation synchronous condenser and a control method, an AC-excitation induction machine, a full-controlled AC excitation converter, a grid-side converter and a controller. The AC-excitation induction machine is the core power converting device, and its stator and rotor windings are AC windings with terminals. The controller is configured to control the full-controlled AC excitation converter to perform excitation and speed regulation on the AC-excitation induction machine and also control the grid-side converter to ensure the excitation capability of the full-controlled AC excitation converter, so that support and regulation of the active power and reactive power are achieved.

Abstract: A light emitting device, an optical module and a manufacturing method thereof are disclosed. According to an example of the disclosure, the light emitting device may comprise an optical waveguide chip, a light emitting chip and a grating between the light emitting chip and the optical waveguide chip. The light emitting chip may emit laser light. The grating may couple the laser light emitted from the active layer into the optical waveguide chip in a way that the laser light is output along a length direction of the optical waveguide chip.

Abstract: A three-dimensional packaging structure and a packaging method of power devices. The packaging structure includes power devices, direct copper bonded substrates (i.e., DBC substrates), flexible printed circuit boards (i.e., FPC boards), bonding wires, heat dissipation substrates, decoupling capacitors, a heatsink with integrating the fan, shells, and forms a half-bridge circuit structure composed by the power devices. The power circuit structure is optimized, parasitic inductance in the commutation loop is reduced by mutual inductance cancellation, thus overvoltage and oscillation during the power device switching process can be reduced. Additionally, by using the flexible characteristic of the flexible PCB, a three-dimensional packaging structure is formed and power density is improved.

Abstract: A nanoparticle continuous-coating device based on spatial atomic layer deposition. A first-stage pipeline unit, a second-stage pipeline unit, a third-stage pipeline unit and a fourth-stage pipeline unit which are connected sequentially. The first-stage pipeline unit is used for providing a first precursor and enabling the first precursor to be adsorbed on surfaces of nanoparticles. The third-stage pipeline unit is used for providing a second precursor and enabling the second precursor to react with the first precursor on the surfaces of the nanoparticles, so that a monomolecular thin film layer is generated on the surfaces of the nanoparticles. The second-stage and fourth-stage pipeline units are used for cleaning the nanoparticles and discharging the redundant first precursor, the redundant second precursor or reaction by-products.

Abstract: A method for preparing a material composition comprising a hollow transition metal oxide nanoparticle supported upon a carbon material support includes a solution impregnation process step, followed by a thermal reduction process step and finally a thermal oxidation process step. The material composition, an electrode and an electrical component such as but not limited to a battery are all predicated at least in-part upon the material composition prepared in accord with the foregoing method. The foregoing material composition, electrode, battery and method may ultimately provide a LIB with enhanced performance.

Abstract: The present invention relates to a method of sensing aerosol characteristic parameters using dual-wavelength light scattered signals and the application thereof, and belongs to the technical field of fire warning. The method procedures include measuring the scattered light power of two different wavelengths, calculating the surface area concentration and the volume concentration of aerosol, and obtaining the Sauter mean diameter of the aerosol the surface area concentration, the volume concentration and the aerosol Sauter mean diameter are compared with corresponding thresholds, and then corresponding fire alarm signals are emitted.

Abstract: The invention discloses a method for generating a row transposed architecture based on a two-dimensional FFT processor, comprising the following characteristic: the FFT processor includes an on-chip row transposition memory for storing an image row transposition result. When the size of the row transposition result exceeds the capacity of the on-chip memory, the first 2k data of a row of the two-dimensional array after row transformation is written into the on-chip row transposition memory, the remaining data is written into the off-chip SDRAM, and k is acquired through calculation according to the row transposition result and the capacity of the on-chip row transposition memory. The on-chip memory is divided into two memories A and B used for storing the row transposition partial result and temporarily storing data read from off-chip SDRAM.

Abstract: A light emitting device, an optical module and a manufacturing method thereof are disclosed. According to an example of the disclosure, the light emitting device may comprise an optical waveguide chip, a light emitting chip and a grating between the light emitting chip and the optical waveguide chip. The light emitting chip may emit laser light. The grating may couple the laser light emitted from the active layer into the optical waveguide chip in a way that the laser light is output along a length direction of the optical waveguide chip.

Abstract: The present invention discloses an active airbearing device, including a airbearing body, a gas film active adjusting unit, a support body detection unit and a drive control unit, wherein the support body detection device measures a state of airbearing, the drive control system generates a control signal according to a detection signal, drives and controls the gas film active adjusting device to generate an active action, and dynamically adjusts the form of gas films on a airbearing surface, so as to dynamically adjust pressure distribution of gaps between the gas films of the airbearing device, thereby improving dynamic stiffness characteristics of the airbearing.

Abstract: A moving platform borne infrared image-spectrum associated detection system includes an optical hood, a broadband optical system, a two-dimensional servo system, an infrared optical fiber, a Fourier interference spectrum module, an image-spectrum associated detection processing module, a power supply module, and a display module. Incident light enters from the optical hood to the broadband optical system, and is split by a spectroscope. Transmitted light is focused by a long-wave imaging lens group on an infrared detector for imaging. Reflected light is focused by a broadband spectrum lens group to an optical fiber coupler, enters the Fourier interference spectrum module through the infrared optical fiber to form an interference pattern, and undergoes Fourier transform to obtain spectral data.