197results about How to "Stable response" patented technology

Spine stabilization devices, systems and methods are provided in which a single resilient member or spring is disposed on an elongate element that spans two attachment members attached to different spinal vertebrae. The elongate element passes through at least one of the two attachment members, permitting relative motion therebetween, and terminates in a stop or abutment. A second resilient member is disposed on the elongate element on an opposite side of the sliding attachment member, e.g., in an overhanging orientation. The two resilient members are capable of applying mutually opposing urging forces, and a compressive preload can be applied to one or both of the resilient members.

An optical measurement device and method are presented for use in non-invasive measurements on a patient's body. The device comprises an illumination assembly configured and operable to generate illuminating light of a predetermined wavelength range; a detection assembly; and a light directing assembly. The detection assembly comprises a first detector unit for detecting a first light signal transmitted through an illuminated body portion and generating first measured data indicative of the detected transmitted light, and a second detector unit for detecting a second light signal reflected from the illuminated body portion and generating second measured data indicative of the detected reflected light. The light directing assembly comprises a light diffuser for scattering back light incident thereto, to thereby direct the illuminating light or the light coming from the body portion back towards the body portion. This technique provides for increasing the amount of light reaching a region of interest inside the body portion and maximizing homogeneity of the first and second detected light signals.

Ionic liquids are incorporated into transducers, actuators or sensors which employ the ionic polymer membranes. The ionic liquids have superior electrochemical stability, low viscosity and low vapor pressure. The transducers, actuators and sensors which utilize ionic polymer membranes solvated with ionic liquids have long term air stability. Superior results are achieved when a conductive powder and ionomer mixture is applied to the ionic polymer membrane to form the electrodes during or after the ionic liquid is imbibed into the ionic polymer membrane.

Consistent and reliable releasing of a guardrail during a vehicle impact is enabled by a releasable fastener for safety structures along a highway. The release of secured components such as guardrail is controlled, and precise positional cooperation is provided between securing members and the guardrail. Forces may be attenuated to further optimize response.

A wheel suspension system having under powered acceleration a stable squat magnitude response.

The invention discloses a comprehensive control method for a high-power efficient energy consuming high-frequency switching power supply. The high-power efficient energy consuming high-frequency switching power supply comprises a three-phase current inverter and a high-frequency DC / DC (Direct Current to Direct Current) converter, wherein the high-frequency DC / DC converter consists of a single-phase full-bridge inverter, a high-frequency coupling transformer and a low-voltage rectifier which are connected in series in sequence; the input end of the three-phase current inverter is connected with a group of three-phase capacitors connected in a Y form, and is connected with a power grid through a three-phase inductor L; and the three-phase current inverter is connected with the single-phase full-bridge inverter of the high-frequency DC / DC converter. According to the method, quick response of a system is realized, change of a load is tracked quickly, efficient power consumption of the system is realized, and the voltage and current distortion factors of the system are decreased.

Micro-electromechanical devices include a temperature-compensation capacitor and a thin-film bulk acoustic resonator having a first terminal electrically coupled to an electrode of the temperature-compensation capacitor. The temperature-compensation capacitor includes a bimorph beam having a first electrode thereon and a second electrode extending opposite the first electrode. This bimorph beam is configured to yield an increase in spacing between the first and second electrodes in response to an increase in temperature of the micro-electromechanical device. This increase in spacing between the first and second electrodes leads to a decrease in capacitance of the temperature-compensation capacitor. Advantageously, this decrease in capacitance can be used to counteract a negative temperature coefficient of frequency associated with the thin-film bulk acoustic resonator, and thereby render the resonant frequency of the micro-electromechanical device more stable in response to temperature fluctuations.

The present disclosure generally relates to a method for electroplating (or electrodeposition) a transition metal oxide composition that may be used in gas sensors, biological cell sensors, supercapacitors, catalysts for fuel cells and metal air batteries, nano and optoelectronic devices, filtration devices, structural components, and energy storage devices. The method includes electrodepositing the electrochemically active transition metal oxide composition onto a working electrode in an electrodeposition bath containing a molten salt electrolyte and a transition metal ion source. The electrode structure can be used for various applications such as electrochemical energy storage devices including high power and high-energy primary or secondary batteries.

The invention discloses a graphene double-layer electroactive membrane and a preparation method thereof. The graphene double-layer electroactive membrane is composed of a flexible conducting layer anda flexible polymer layer. The preparation method comprises mixing and reacting flake graphite powder, NaNO3, sulfuric acid, KMnO4 and deionized water, and performing washing and drying processes to obtain graphene oxide; mixing and ultrasonic-dispersing the graphene oxide, hydrazine hydrate, ammonium hydroxide and deionized water for reaction to obtain reduced graphene oxide dispersion liquid; dropwise or rotatingly applying the reduced graphene oxide dispersion liquid onto a flexible polymer layer-polymer membrane and performing a drying process to form the flexible conducting layer onto thepolymer membrane to obtain the graphene double-layer electroactive membrane. The graphene double-layer electroactive membrane has the advantages of high responsiveness, low power, broad pressure range and the like when being electrically driven, and can be applied to the fields of flexible wearable equipment, micro motor actuators and micro-robots.

The invention relates to the field of sewage treatment system control, and discloses a sewage pumping station dynamic control method and system. The dynamic control method comprises the steps of dividing a water level of an upstream pipe network into multiple sections of consecutive water level ranges, wherein each section of water level range is provided with corresponding target flows, and each target flow is provided with a corresponding water pump group; obtaining the upstream pipe network real-time water level so that a corresponding pump group scheme can be obtained; comparing a water collection pond water level with a target water level, or comparing pump station real-time delivery flow with the target flow, and adjusting a variable frequency pump according to a comparison result to achieve steady state control of the water level of the flow of the water collection pond, wherein the water level range comprises an ascending water level range and an descending water level range which are arranged in a staggered mode. According to the provided sewage pump station dynamic control method and system, based on a PLC control system, the stability of system control and the operation efficiency of a water pump can be improved, and the service life of a pump set can be prolonged, so that the system control long-term operation stability is high, and the sewage pumping station dynamic control system is easy to install and repair.

The invention relates to a control method of a servo motor. The control method of the servo motor comprises the steps that when a servo driver receives a rotating speed instruction given by an upper motion controller, and the rotating speed instruction is not zero, the servo driver works in a rotating speed closed-loop control mode, receives the rotating speed instruction of the upper motion controller, and controls a controlled object to rapidly and stably arrive at a target position; when the rotating speed instruction is set to be zero, the servo driver works in a motor position closed-loop control mode, a result obtained through calculation of a position loop serves as an actual rotating speed instruction, and the controlled object can be fixed to the target position. Influence of rotating speed feedback value fluctuation on a control result is eliminated, and shakes of the controlled object are prevented.

The invention provides an electrochemical sensor for detecting mercury as well as a preparation method and application of the electrochemical sensor. The electrochemical sensor comprises a glassy carbon electrode, a probe P2 and a mercapto-modified probe P3 which is fixed on gold nano-particles; the surface of the detection end of the glassy carbon electrode is modified with carbon-doped graphite-like carbon nitride; the gold nano-particles deposit on the carbon-doped graphite-like carbon nitride; a mercapto-modified probe P 1 is linked to the gold nano-particles; a part of deoxyribonucleotide of the probe P2 can be in complementary pairing with a part of deoxyribonucleotide of the mercapto-modified probe P1 to form a double-chain structure; and unpaired deoxyribonucleotide in the probe P1 and probe P2 and the mercapto-modified probe P3 which is fixed on the gold nano-particles form the double-chain structure. The preparation method comprises the following steps of modifying the graphite-like carbon nitride, modifying nanogold, modifying the probe P1 and the like. The electrochemical sensor provided by the invention has strong ability of resisting heavy metal ion interference and can be applied to detecting mercury ions.

The invention is suitable for the fields of information security and integrated circuits, and provides a high-stability strong physical unclonable function circuit and a design method therefor. The physical unclonable function circuit comprises a time delay generation module, a time delay comparison module, a response calculation module and a stability judgment module, wherein the time delay generation module is used for transmitting the same jump through a plurality of time delay paths according to an input stimulus of the strong physical unclonable function circuit and generating a plurality of time delay values; the time delay comparison module is used for selecting out multiple pairs of time delay values from the time delay values, performing time delay difference comparison and dividing the time delay differences of the pairs of time delay values into a plurality of grades according to difference values; the response calculation unit is used for calculating an output response of the strong physical unclonable function circuit according to the time delay difference grade of each pair of time delay values; and the stability judgment module is used for judging whether a stimulus response pair is stable or not according to the time delay difference grade of each pair of time delay values. According to the circuit and the method, while the attack resistance of the strong physical unclonable function circuit is ensured, the time delay difference can be measured online in real time, so that the stability is greatly improved.

The invention discloses a management method and device of a micro service node in a cloud computing system. The method comprises: acquiring a first weight value configured for each micro service node,wherein the first weight value is used for controlling the proportion information of the micro service request allocated to the micro service node to all the micro service requests, acquiring load state information of each micro-service node in the process of processing the micro-service request corresponding to the first weight value, adjusting the value of the first weight value according to the load state information of each micro-service node to obtain a second weight value of each micro-service node, and cotrolling the proportion of micro service requests allocated to each micro servicenode according to the second weight of each micro service node.

The present invention discloses a large-capacity serial type active power filter which includes fundamental current detection unit I, fundamental compensation current generating unit II and serial transformer III, among which the unit II consists of N (Níœ500) number of the same subunits II' with its input end being connected with output end of unit I, the serial transformer III has N number of the same windings at its secondary side with each winding being connected with the corresponding subunit II' and primary winding being connected in series with electric grid bus. Each subunit II' sendsgenerated fundamental current i2 / N to the corresponding secondary winding ax in the serial transformer according to the fundamental current signal i.s. All i2 / N have the same magnitude and the same phase but antiphase at fundamental curvent i1 of the electric grid bus so as to make fundamental magnetomotive force of the primary.

A guardrail system for installation along a highway includes a plurality of spaced elongate support posts and a guardrail mounted on the plurality of support post by securing members. The system includes one of a releasing member and an edge portion of an opening in the guardrail or the support post for releasing the guardrail from the support post in response to a selected magnitude of release load. The magnitude of the release load is in the range of ⅖ to 1⅖ times a load magnitude that yields the support post when the post is unsecured to the guardrail.

New combinations of semiconductor devices in conjunction with optically active materials are set forth herein. In particular, light emitting semiconductors fashioned as diodes from indium gallium nitride construction are combined with high-performance optically active Langasite La3Ga5SiO14 crystalline materials. When Langasite is properly doped, it will respond to the light output emissions of the diode by absorbing high energy photons therefrom and reemitting light of longer wavelengths. High-energy short wavelength light mixes with the longer wavelengths light to produce a broad spectrum which may be perceived by human observers as white light. Langasite, a relatively new material, enjoying great utility in frequency control and stabilization schemes has heretofore never been used in combination with optical emission systems.

The invention relates to a trapezoidal wave excited sensitivity-variable time difference type magnetic flux gate sensor and a data processing method. An FPGA (Field Programmable Gate Array), a D / A (Digital-to-Analog) conversion circuit, a V / I (Voltage-to-Current) conversion circuit, an excitation coil, a magnetic core, a frame, an induction coil, a matching resistor, an instrument amplifying circuit, a band-pass filter circuit, a hysteresis shaping circuit, a not-gate circuit and the FPGA are connected in turn to form the trapezoidal wave excited sensitivity-variable time difference type magnetic flux gate sensor. According to the trapezoidal wave excited sensitivity-variable time difference type magnetic flux gate sensor and the data processing method, a time difference type magnetic flux gate with the time difference of a positive pulse and a negative pulse which are output through the sensor as a detection method is stable in output response, high in sensitivity and low in power consumption; a circuit structure is simple, the performance of the response stability of the output time difference of the existing time difference type magnetic flux gate sensor is improved, the detection output accuracy is increased, and the measurement requirements of the actual target magnetic field are met; the data processing is performed through the FPGA and accordingly the speed is high, the resolution is high, and the signal frequency is controllable; time difference data are processed and accordingly the impact on signals of noise is reduced, the accuracy is improved, and the trapezoidal wave excited sensitivity-variable time difference type magnetic flux gate sensor and the data processing method are suitable for real-time dynamic magnetic field measurement of the magnetic flux gate; the process is simple and the digitization of the time difference type magnetic flux gate sensor can be achieved.

The reactor comprises the current detecting unit I, the compensation current generating unit II, the transformer III, the main control unit IV, the current signal setter cell V. The said unit II comprises N identical subunits II'. Each subunit in the N identical subunits generates the compensation current alphai2 / N in same magnitude and same phase, which is in opposite phase to the current signal ils on the generatrix at the primary side, in order to follow the signal ils. There are also N windings with same number of turns and same size at the second side. Each winding is conncted to the said subunits II'. Based on designed operating mode, the primary winding can be connected to a generatrix of power networks in serial or parallel, making the impedance of the transformer present the controlable change in (0 Zm) to a current. The invention uses devices with lower voltage and smaller current to produce controllable reactor suitable to operation at high voltage and larg current.

The invention relates to a hybrid power system based on a dual-mode homogenizing compression ignition internal combustion engine. The hybrid power system comprises a power device, a transmission device, a clutch device, an inverting control device, a power battery unit and a hybrid power control unit. The invention further relates to a hybrid power control method and automobile achieved on the basis of the hybrid power system. The hybrid power system has the advantages of being good in technical expansibility and high in following performance, benefit-cost ratio and practical value and having flexibility in hybrid power flow direction control and can be applied to almost all vehicle models.

A switching regulator for controlling transmit antennas of variable impedance, particularly transmit antennas of a keyless access authorization system in or for a vehicle, having an input terminal into which an antenna potential applied or appliable at the transmit antenna may be coupled, and having a control circuit designed to generate a compensation signal as a controlled variable for adapting the antenna potential to an actual output impedance and to establish a slope of the compensation signal depending on the actual antenna potential. The invention relates furthermore to a transceiver circuit with such a switching regulator and to a keyless access control system in or for a vehicle.

The invention discloses a method for assessing a road surface three-dimensional structure, wherein three-dimensional coordinate values are obtained through reconstructing the road surface three-dimensional structure, according to the correlation of the three-dimensional coordinate values, a road surface macroscopic structure is quantitatively analyzed, and is assessed on the basis of the geometrical comprehensive assessment index, i.e. the antiskid index SI, so basis is provided for further analyzing the road surface functions. The method is convenient to operate, is mostly carried out by depending on a computer, no operation of the professional staff is needed, the personal error is small, the assessment index has very strong universality, the method is not influenced by the coordinate direction, the road surface macroscopic structure can be accurately and stably reflected, the result is round to the ten thousandth decimal, the assessment precision is higher, the five components have different sensitivities to the geometric characteristic variation of the road surface, so the comprehensive integral description can be provided, accordingly, the macroscopic structure condition of the road surface is really reflected, and the whole assessment system is comprehensive and complete.

The invention discloses a primary frequency modulation controller, control method and system of a thermal power unit. The primary frequency modulation controller comprises a drooping type frequency response controller and a fuzzy controller; the drooping type frequency response controller is arranged on the coordination control side of the thermal power unit, an input of the drooping type frequency response controller is a system frequency difference value of the thermal power unit, and an output of the drooping type frequency response controller is an active adjusting instruction of the coordination control side of the thermal power unit; the fuzzy controller is arranged on the digital electro-hydraulic side of the thermal power unit, an input of the fuzzy controller is the system frequency difference value of the thermal power unit, and an output of the fuzzy controller is an action quantity of an adjusting valve; and the drooping type frequency response controller and the fuzzy controller are combined to carry out frequency difference response control on the thermal power unit. The problem in that the thermal power unit daily participates in small system frequency disturbance adjustment and quick response after large frequency disturbance can be solved; and the problem of wear caused by frequent adjustment of a DEH control system of the thermal power unit can be solved.