206 results about "Periodic alternating" patented technology

A process and device for detecting electrically conductive particles in a liquid flowing in a pipe section, the liquid being exposed to periodic alternating electromagnetic fields by a transmitter coil which induces eddy currents in the particles, a probe made as a coil arrangement and which has an effective width producing a periodic electrical signal based on the eddy currents. The signal ha a carrier oscillation with an amplitude and / or phase which is modulated by particles passing across the effective width of the coil arrangement, the probe signal being filtered by a frequency-selective first filter unit, the filtered signal being sampled by a triggerable A / D converter stage to obtain a demodulated digital measurement signal, the digital measurement signal being filtered by a digital, frequency-selective adjustable second filter unit to obtain a useful signal, and the useful signal being evaluated to detect passage of electrically conductive particles in the pipe section.

A diffraction device having, on a transparent substrate plate, a diffraction pattern composed of periodically alternating array of first and second phase control zones. Each one of the first and second phase control zones is provided with an infinitesimal ruled structure in a pitch of the order of sub-wavelength, i.e., in a pitch smaller than the shortest wavelength of incident light, thereby to control phase shifts to the same angle in a plural number of wave ranges. The infinitesimal ruled structure in the first and second phase control zones are disposed in perpendicularly intersecting relation with each other. Thus, the diffraction device can diffract incident light with a diffraction efficiency free from dependency on wavelength and give a performance not dependent on the direction of polarization of incident light.

A method, system, and computer program product that provides a two-index system for clusters of small cells in a wireless network. A first index is employed for access to and identification of a serving cell within a cluster of small cells. A second index indicates a group of small cells for determining mobility control. The first index may be derived from primary / secondary synchronization signals, or from frequency / time division multiplex signal position. The second index may be indicated in system / master information block signals or predefined as a plurality of small cells identified by the first index for each cell. Determination of physical cell identification is aided by providing a plurality of primary / secondary synchronization (PSS / SSS) signal alternating configurations with indicator, wherein a maximum number of configurations is predefined. Signaling the PSS / SSS configurations by one of broadcast or dedicated signaling, said signaling indicating whether each configuration is one of periodic or aperiodic alternation.

Disclosed is a device for promoting decomposition of body fat and enhancing muscular strength, comprising: a base seated on a horizontal surface; a post uprightly provided in the front part of the base; a foothold mounted to be vertically movable on the base; a drive unit provided in the base to periodically and alternately raise and lower the opposite ends of the foothold; and a control section provided on the post for controlling the drive of the drive unit. The drive unit comprises a drive source mounted on the base, rotational shafts, which are respectively connected to driving axes extending from the opposite sides of the drive source, balance weights each being secured to one of the rotational shafts, which extend through the balance weights, eccentric axles each being directly formed on one of the rotational shafts, and connecting rods each being connected to one of the eccentric axles.

The invention discloses a control method of a drive system, the drive system, and a new energy vehicle. The method obtains a current temperature value of a power battery in real time; when the temperature value is lower than a first preset temperature threshold, the temperature is raised to restore the drive capability of the drive system. A motor controller applies a periodic alternating voltagevector to a motor, the voltage vector is utilized to modulate bus current of a power battery to alternate, and during the process, the battery is driven to be repeatedly charged and discharged periodically to increase the temperature of the battery. Until the temperature value reaches a second preset temperature threshold, the battery is warmed to a desired operating temperature and the motor controller stops applying the voltage vector. Three-phase winding of the motor and three sets of bridge arms are used during the heating of the power battery. The recovery of the drive capability of the drive system is more economical without the need for additional external heating equipment. During the entire process of applying the voltage vector, the power battery is continuously and uniformly heated, the battery heating efficiency is very high, and rapid recovery of the drive capability is achieved.

The invention provides a method and device of realizing parallel receiving of GNSS multimode by adopting a single-pass radio frequency front-end and belongs to the radio frequency communication technical field. The method comprises: after RF frequency signal received entering the single-pass radio frequency front-end, a sampling period of a signal pathway is divided into N short time segments according to the number N of the modes of receiving signals, the RF signals is down converted into IF signals by a Mixer and a LPF low pass filter controlled by a time division multiplexed signal to shift the time division multiplexed signal, the single-pass radio frequency front-end receives a mode of signal within every short time segment and realizes parallel receiving signals of N modes at the single-pass radio frequency front-end in such periodic alternating repetition. The invention can realize the parallel receiving of GNSS multiple modes (including BD-2, GPS, Galileo and GLONASS) with only a single-pass radio frequency front-end under the control of the time division multiplexed system.

The invention discloses a magnetic bead-based sample treatment and nucleic acid automatic extraction system, comprising a micro-fluidic chip and a micro motor drive device, wherein the micro-fluidic chip comprises a layer of cover plate, two layers of bottom plates and two layers of structure plates, wherein the chip can automatically finish the operation processes such as cell lysis, nucleic acid purification, nucleic acid eluting and the like, and finally a nucleic acid sample is obtained. Based on siphon principle or micro-fluidic surface tension properties, a driven drive pump without external drive force is designed by the chip, so as to achieve flowing and transferring of a detection sample, a reaction reagent and reaction liquid waste. Under mixed hardening of a micro vibration motor, through a periodic alternating magnetic field and a constant magnetic field provided by an external magnet, effective mixing between the magnetic bead and the reaction sample and the reaction reagent in a reaction cavity, and fixing of the magnetic bead in the liquid waste discharge process are achieved; and the chip is matched with a full-automatic micro motor drive device to automatically finish a plurality of reaction steps, so that a high-purity nucleic acid sample template is provided for gene amplification reaction.

The invention provides a broadband all-dielectric multilayer-film reflective diffraction grating and a design method thereof. The broadband all-dielectric multilayer-film reflective diffraction grating comprises a base, a high film reflecting layer and a grating layer, wherein the high film reflecting layer and the grating layer are formed by periodic alternation of a high-refractive index material and a low-refractive index material. The invention is characterized in that a matching layer and a residual film layer are arranged between the high film reflecting layer and the grating layer; the refractive index of the material of the matching layer is as the same as the low-refractive index material in the high film reflecting layer; the refractive index of the material of the grating layer and the material for etching the residual film layer is less than that of the high-refractive index material; and the period and the duty cycle and the etching depth of the grating layer, the thickness of the residual film layer, the thickness of the matching layer and the wavelength control value for preparing the high film reflecting layer are correlated and determined by a multi-parameter optimization design. In the invention, the diffraction efficiency of the broadband all-dielectric multilayer-film reflective diffraction grating is more than 97.5% when an incident TE polarized light approaches within the range of more than 100nm spectral bandwidth in a 1-grade reflective diffraction direction.

Disclosed herein is a functional electrical stimulation (FES) device and system. In one embodiment, sequential bipolar pulse stimulation may be provided to an area of a living body via one or more electrode leads applied to the area via a FES device comprising a current pulse generating circuit comprising output nodes for operative coupling to the one or more electrode leads, and configured for operative coupling to a voltage supply. The current pulse generating circuit generally comprises positive and negative stimulation paths drawing from the voltage supply to respectively apply positive and negative currents through the area via the one or more electrode leads. In one example, the stimulation paths comprise respective capacitive elements, a capacitance ratio of which dictating, at least in part, an amplitude ratio of the positive and negative currents, wherein periodic alternative activation of the stimulation paths provides the sequential bipolar pulse stimulation. In another example, each path comprises a respective charging element and a respective activation switch, wherein each respective charging element is charged by the voltage supply and discharged upon activation of the respective activation switch to generate positive and negative current pulses respectively, such that a pulse rise time of the positive and negative current pulses is predominantly dictated by a switching speed of each respective switch. Systems and uses for these devices, and FES in general, are also described.

A method of driving an electrophoretic display apparatus, wherein during displaying an image on the display unit, executing a pixel electrode pulse driving in which a pulse periodically alternating between first and second potentials is input to the pixel electrode corresponding to the pixel of which a display state is changed, the first or second potential is input to the pixel electrode corresponding to the pixel of which a display state is not to be changed, and a potential equal to that of the pixel electrode corresponding to the pixel of which a display state is not to be changed is input to the common electrode.

Abstract of Disclosure In a treatment method of room air by air ionization, sensors such as air-quality sensors, an airflow sensor, an air humidity sensor, an ozone sensor, are provided. Parameters such as oxidizable air components, relative humidity, flow velocity, flow volume, ozone level, and intensity of oxygen ions are measured. The level of ionization power of the ionization apparatus is determined by an electronic control device based on the measured parameters. The ionization power is lowered, when a predetermined ozone value is detected, and, when the ozone level continues to increase after lowering the ionization power indicating an external ozone source, ozone decomposition is initiated by changing a time period of the applied periodic alternating voltage, supplied in the form of alternating pulses or packages of alternating pulses of a preset number or a combination of alternating pulses and packages of alternating pulses of a preset number.

A surface emitting semiconductor laser (10) is shown having a semiconductor lasing structure having an active layer (22), opposed cladding layers contiguous to said active layer, a substrate (17), and electrodes (12,14) by which current can be injected into the semiconductor lasing structure. Also included is a second or higher order distributed diffraction grating (24) having periodically alternating elements, each of the elements being characterized as being either a high gain element (26) or a low gain element (28). Each of the elements has a length, the length of the high gain element and the length of the low gain element together defining a grating period, where the grating period is in the range required to produce an optical signal in the optical telecommunications signal band. The total length of the high gain elements is no more than the total the lengths of the low gain elements. A single laser structure may be provided or an array of side by side laser structures on a common substrate is also provided. In a further aspect a method of testing laser structures on wafer is provided.

A compact synchrotron radiation source includes an electron beam generator, an electron storage ring, one or more wiggler insertion devices disposed along one or more straight sections of the electron storage ring, the one or more wiggler insertion devices including a set of magnetic poles configured to generate a periodic alternating magnetic field suitable for producing synchrotron radiation emitted along the direction of travel of the electrons of the storage ring, wherein the one or more wiggler insertion devices are arranged to provide light to a set of illumination optics of a wafer optical characterization system or a mask optical characterization system, wherein the etendue of a light beam emitted by the one or more wiggler insertion devices is matched to the illumination optics of the at least one of a wafer optical characterization system and the mask optical characterization system.

The invention relates to optical devices comprising a transparent substrate and a first transparent grating layer on the substrate, the grating layer comprising periodically alternating zones having different refractive indices. According to the invention, the device comprises a second transparent grating layer located on top of the first grating layer and also comprising periodically alternating zones having different refractive indices so that the zones of the first grating layer having higher refractive index are at least partly aligned with the zones of the second grating layer having lower refractive index and vice versa, the second grating layer reducing the amount of light diffracted to non-zero transmission orders. The invention allows for reducing the so-called rainbow effect for example in head-up displays (HUDs).

A liquid crystal display includes a plurality of pixels arranged in a matrix, a substrate, and a plurality of gate lines, data lines, thin film transistors, pixel electrodes, and storage electrode lines. The gate lines are formed on the substrate. The data lines run crosswise relative to the gate lines above or below the gate lines, and the thin film transistors are connected to the gate lines and the data lines. The pixel electrodes are connected to the thin film transistors, and have a first side formed in parallel with the gate lines and a second side shorter than the first side and adjacent to the first side. The storage electrode lines overlap with the pixel electrodes. Storage electrode signals applied to the storage electrode lines are periodic alternating signals.

The invention discloses a transmission line, a leaky-wave antenna multiplexing device and a beam scanning method thereof. The device comprises a dielectric substrate, a metal strip and a metal floorboard positioned on the front and back surfaces of the dielectric substrate, and periodically alternatively arranged capacitors and variable capacitance diodes for connecting the metal floorboard and the metal strip via the through holes. The metal strip comprises gradient microstrip line structures at two ends and an artificial surface plasmon structure positioned therebetween. When the capacitance value of the variable capacitance diode is identical with that of the fixed capacitor, the surface impedance of the device is identical, and thus the function of the transmission line is achieved; when the capacitance value of the variable capacitance diode is not identical with that of the fixed capacitor, the surface impedance of the device is periodically modulated, and thus the radiation function of the leaky-wave antenna is achieved. Voltage is used as a regulation means, and fixed frequency beam scanning can be achieved along with the change of the voltage; the device is simple to manufacture, convenient to operate and prone to integrate; only a photoetching step is needed, so that cost is saved, and machining errors caused by a multi-layer structure are avoided.

A tool has a main part of hard metal, cermet, ceramic, steel, high-speed steel, and a single or multilayer wear protection coating applied onto the main part by CVD and which has a thickness from 3 μm to 25 μm. The wear protection coating has at least one Ti1-xAlxCyNz layer with stoichiometric coefficients 0.70≦x<1.0≦y<0.25 and 0.75≦z<1.15 and a thickness from 1.5 μm to 17 μm. The T1-xAlxCyNz layer has a lamellar structure with lamellae with thickness of no more than 150 nm, preferably no more than 100 nm, particularly preferably no more than 50 nm. Lamellae are made of periodically alternating regions of the Ti1-xAlxCyNz layer with alternatingly different stoichiometric proportions of Ti and Al, having the same crystal structure (crystallographic phase), and the Ti1-xAlxCyNz layer has at least 90% vol. % of face centered cubic (fcc) crystal structure.

The invention discloses a block chain consensus processing method. The method comprises the steps that a preset number of high-quality nodes are selected from a block chain system according to a periodic alternating mechanism and a POW algorithm; and transaction consensus processing is conducted among the selected nodes. The invention further provides an electronic device and a computer readable storage medium. According to the block chain consensus processing method, the electronic device and the computer readable storage medium, a hierarchical consensus mechanism can be achieved in the blockchain system, a probabilistic consistency consensus algorithm is combined with an absolute consistency consensus algorithm, a relatively small number of nodes are selected from a large number of network nodes through the probabilistic consistency consensus algorithm firstly, then high-efficiency consensus is conducted on consensus content in the selected nodes through the absolute consistency consensus algorithm, the availability of the block chain system is improved, and the application range of the block chain system is expanded.

A battery management system for a battery module string includes battery modules. The battery modules are electrically connectable to poles of the battery module string and individually electrically disconnectable. The battery module string is configured to generate an AC voltage by disconnecting and connecting the battery modules. The battery management system is configured to assign a respective first time period to each first battery module of the battery modules based on position of each first battery module in a battery module list. Each of the first battery module is electrically connected within a half-cycle of the AC voltage during the respective first time period.

A tool with a main body made of hard metal, cermet, ceramic, steel or high-speed steel and a single- or multi-layered wear resistant coating applied thereto in a PVD process, wherein at least one layer of the wear resistant coating is a titanium aluminium nitride layer, TixAlyN where x + y = 1, which can contain, depending on the process used, up to 5 percent by weight of further metals, characterised in that the TixAlyN layer is a multilayer substructure with a plurality of periodically alternating Tix (A)Aly(A)N layers (A), where x(A)+ y(A) = 1 and Tix(B)Aly(B)N layers (B), where x(B) + y(B) = 1, wherein the Al concentration y(B) in layers (B) is at most 70 atomic weight percent (y(B) <= 0.70), and wherein the Al concentration y(B) in layers (B) is 10 to 25 atomic weight percent higher than the Al concentration y(A) in layers (A) (y(B) = (y(A) + 0.10) to (y(A) + 0.25)).

A liquid crystal display device with a switchable viewing angle, and a viewing angle switching method. The liquid crystal display device comprises a display panel (20), wherein the display panel (20)comprises a first substrate (21), a second substrate (22) arranged opposite the first substrate (21), and a liquid crystal layer (23) located between the first substrate (21) and the second substrate(22); a viewing angle control electrode (215) is arranged on the first substrate (21), and a common electrode (225) and a pixel electrode (227) are arranged on the second substrate (22); the display panel (20) may be switched between a wide viewing angle mode and a narrow viewing angle mode. The liquid crystal display device also comprises a display control module (33) and a voltage output module(34), wherein in the wide viewing angle mode, the screen refresh frequency of the display panel (20) is the same as a data input frequency at which screen data is input to the display control module (33), and the voltage output module (34) outputs a direct-current voltage to the viewing angle control electrode (215); and in the narrow viewing angle mode, the screen refresh frequency of the displaypanel (20) is twice or quadruple the data input frequency at which the screen data is input to the display control module (33), and the voltage output module (34) outputs a periodic alternating-current voltage to the viewing angle control electrode (215).

The invention discloses a gallium nitride-based light-emitting diode (LED) with an omnidirectional reflector and a manufacturing method of the gallium nitride-based LED. The gallium nitride-based LED with the omnidirectional reflector comprises a sapphire substrate and a gallium nitride-based epitaxial lamination, wherein the gallium nitride-based epitaxial lamination is formed on a first surface of the sapphire substrate; the gallium nitride-based epitaxial lamination comprises an N-type gallium nitride-based epitaxial layer, a P-type gallium nitride-based epitaxial layer and a light-emitting layer located between the N-type gallium nitride-based epitaxial layer and the P-type gallium nitride-based epitaxial layer; the omnidirectional reflector is formed a second surface of the sapphire substrate, which is opposite to the first surface; and moreover, from the second surface, the back-plated omnidirectional reflector comprises a plurality of layers of diaphanous dielectric layer piles, a gallium oxide layer and a silver reflecting layer in sequence, wherein the refractive indexes of the diaphanous dielectric layer piles are periodically and alternately changed ups and downs. Through inserting the gallium oxide layer between a silver diaphanous dielectric material layer and an oxide diaphanous dielectric material layer, the problem that the adhesion between the silver diaphanous dielectric material layer and the oxide diaphanous dielectric material layer is poor is solved.

An Al component gradually-changed N-type LED structure and a preparation method thereof are disclosed. The Al component gradually-changed N-type LED structure successively comprises, from bottom to top, a substrate, a nucleating layer, a buffer layer, an N-type Al<Y>In<X>Ga<1-X-Y>N layer, a multi-quantum well light-emitting layer, and a P-type GaN layer. In the N-type Al<Y>In<X>Ga<1-X-Y>N layer, X is more than or equal to 0 but less than or equal to 1, and Y is more than 0 but less than 1. An Al component in an N-type GaN layer is gradually changed. The method comprises the following steps of: (1) growing the nucleating layer on a processed substrate; (2) growing a non-doped gallium nitride buffer layer on the nucleating layer; (3) growing the N-type Al<Y>In<X>Ga<1-X-Y>N layer on the buffer layer; (4) growing the multi-quantum well light-emitting layer on the N-type Al<Y>In<X>Ga<1-X-Y>N layer, wherein the multi-quantum well light-emitting layer is formed by periodically and alternately superposed InGaN potential well layers and GaN barrier layers; and (5) growing the P-type GaN layer on the multi-quantum well light-emitting layer. An N-type region is prepared by an Al component gradually-changed mode, thereby improving electron concentration and an antistatic effect, essentially improving GaN film quality, enhancing current expansion capability, and increasing light extraction efficiency.

The invention discloses a position encoder. The position encoder comprises a stator module, and the stator module comprises an excitation coil and a receiving coil assembly; the excitation coil is used for conducting high-frequency periodic alternating-current voltage and current, and then generating an alternating electromagnetic field in the region of the stator module; the receiving coil assembly is arranged in the region of the alternating electromagnetic field which is generated by the excitation coil, and the receiving coil assembly can generate induced electromotive force; the positionencoder also comprises a rotor module, and the rotor module is used for influencing electromagnetic coupling strength between the excitation coil and the receiving coil assembly; the position encoderfurther comprises a processing module, and the processing module comprises a signal processing unit and an oscillating circuit unit; and the position encoder further comprises a shielding layer, and the shielding layer is used for shielding outside electromagnetic interference. Compared with the prior art, the position encoder has the advantages that outer interference from metal connecting wires,metal objects, specifically a signal processing module, an electronic component and the like, a motor body and the like can be shielded, so that authenticity of position signals is guaranteed and reliability of the encoder is improved; and absolute-position signals with high precision and high resolution can be provided.

The invention relates to a gas sensing material of cuprous oxide and stannic oxide micro-nano heterogeneous medium array structure and a preparing method thereof, and belongs to the technical field related to gas sensing materials. The structure of the gas sensing material is a film material formed by periodically alternately assembling Cu2O and SnO2 which are parallel in elongated shapes, and the film material is generated on a silicon chip substrate, a Cu2O material is stacked thickly to form a protuberance portion, and a SnO2 material is stacked thinly to form a low ebb portion. The preparing method comprises parallelly placing two copper foil electrodes on a silicon substrate, dripping electrolyte prepared by copper nitrate and stannous chloride between the electrodes, covering a cover glass, refrigerating, solidifying and applying half-sine wave voltage, and enabling Cu2O and SnO2 to precipitate periodically and alternately. The gas sensing material of the heterogeneous medium array structure has gas sensing characteristics, the sensitivity of gas sensing elements is high at a room temperature because the gas sensing material has stable ordered heterogeneous medium structure, the service life is longe, simultaneously energy is saved and the environment is protected.

This is a communication method for dual-processors. The DRAM is divided into four non-overlapping memory regions: the first storage area, the second storage area, the third storage areas and the fourth storage area. The second processor alternately triggered the first processor's interrupt periodically: first interrupt and the second interrupt. After the first interrupt is triggered, before triggering the second interrupt, the second processor reads the communication data stored in the first storage area, and writes the communication data to the third storage area. As a response to the first interrupt, the first processor writes the communication data in the second storage area, and reads the communication data stored in the fourth storage area. After the second interrupt is triggered, before triggering the first interrupt, the second processor reads the communication data stored in the second storage area, and writes the communications data to the fourth storage area. As a response to the second interrupt, the first processor writes the communication data in the first storage area, and read the communication data in the third storage area.

The invention relates to a liquid crystal display driving device. Flicker phenomenon caused by inconsistent light transmittance during application of two-way voltage can be effectively suppressed by applying a one-way voltage signal to a pixel electrode of a pixel region; power consumption of a driving circuit and the number of gamma resistors can be reduced to lower the cost due to the application of the one-way voltage; in addition, by generating a periodic alternating current voltage signal with a high voltage pulse on a common electrode or the pixel electrode, on one hand, the problem that a liquid crystal is easy to age due to the application of the one-way voltage to the pixel electrode can be solved, and on the other hand, impurity ions can be kept in a moving saturated state all the time due to the high voltage pulse; therefore, the phenomenon of residual images can be improved.

The invention provides an interference solar selective heat absorption coating layer. A substrate is coated with the coating layer, and the coating layer comprises a composite absorption layer formed through periodic alternative deposition of transparent dielectric layers and compound material absorption layers; and the material of the compound material absorption layers is selected from one of chromium nitrides, chromium carbides, titanium nitrides, titanium carbides, titanium and chromium alloy nitrides, and titanium and chromium alloy carbides. Compared with traditional pure metal absorption layers, the compound material absorption layer has better physical and chemical stability, has very strong delustring capability in the solar spectrum area, and can substantially improve the weatherability of the coating layer.

The invention discloses a periodic alternating current drive low-temperature plasma ignition method and a periodic alternating current drive low-temperature plasma ignition device, an relates to the technical field of aerospace engine ignition, combustion and propulsion. The method comprises the following steps of: arranging an ignitor at a proper position of a combustion chamber, wherein a high voltage electrode and a low voltage electrode of the ignitor are connected with a high voltage end and a low voltage end of a low-temperature plasma power source, and a frequency controller is connected with the low-temperature plasma power source; triggering the low-temperature plasma power source and a frequency controller switch and adjusting power output parameters; adjusting control discharge frequency of the frequency controller and discharge time of each period; and providing a trigger signal to the low-temperature plasma power source by the frequency controller, discharging by the power source, and discharging to ignite according to certain frequency by the ignitor. The invention also discloses the corresponding periodic alternating current drive low-temperature plasma ignition device. The method and the device have the advantages of large-size ignition, capabilities of shortening ignition delay time, realizing high-efficiency reliable ignition in the aspects of high-altitude low-voltage supersonic speed combustion, lean burn and the like and improving the performance of an engine, industrial energy conservation and emission reduction.