295results about How to "Fix instability" patented technology

An external foot/ankle fixation device has a one-piece frame component and a positionable cross bar that allows the attachment of generally anterior/posterior directed fixation wires or rods emanating from the foot/ankle of a patient. The external fixation device provides a stable fixation platform both in-plane and out-of-plane of the object of fixation (e.g. foot or ankle). The fixation device through the cross bar also provides various degrees of angulation of anterior/posterior directed wires in two planes. Posterior angulation components may be provided to the posterior portion of the frame component that provide additional fixation wire/rod angulation variations. Compression rails may also be provided. An optional elevator component may be attached to the bottom of the frame component that does not obstruct access to the soft tissues on the bottom of the foot. The elevator component protects the bottom of the foot from contaminated surfaces.

The invention relates to the technical field of charging of a battery pack, in particular to a method for evaluating consistency of a rechargeable battery pack. The method comprises the following steps of: charging a battery pack and drawing a battery pack charging curve according to the terminal voltage of the battery pack; calculating direct current internal resistances of all batteries in the battery pack to obtain a charging curve removing ohmic pressure drop; calculating or measuring polarizing voltage to obtain a charging curve removing polarizing voltage influence; singly listing the charging curves of any two batteries; and correcting the two charging curves by adopting the difference of the maximal available capacity of the batteries and the initial state of charge (SOC) to obtain a battery pack charging curve with favorable consistency for finally evaluating the consistency of the battery pack. The corrected battery pack charging curve has favorable consistency; compared with a method for judging the consistency on the basis of singly adopting the outer voltage of the batteries, the difference of performance and a state among the batteries is fixed and is not changed along with the change of charging current and parameters, such as located charge state, and the like, and the problem of no stability brought by a method for evaluating the consistency on the basis of the difference of the applied voltage.

The invention provides an intelligent household electrical appliance control system which is applied to a wireless mesh network, and the system comprises a wireless mesh router and a plurality of intelligent household electrical appliances, wherein one end of the wireless mesh router is in wireless connection with at least two of the intelligent household electrical appliances, the other intelligent household appliances are respectively in direct or indirect wireless connection with the two intelligent household electrical appliances, and the plurality of intelligent household electrical appliances constitute the wireless mesh network; and the other end of the wireless mesh router is in wired connection with Internet, and the multi-jump wireless mesh network connection is provided for the plurality of intelligent household electrical appliances. The intelligent household electrical appliance control system is based on 433MHz, and the mesh network is realized in a family, thereby solving the technical problems of instability and difficulty in network access of wireless use of the existing household electrical appliances, improving the overall stability of a household power utilization system and the data transmission efficiency, and simultaneously facilitating the access of new equipment.

The invention discloses a display panel. The display panel is divided into a central region and a peripheral region, wherein the central region is located at the central position of a base plate and extends outwards from the central position of the base plate to cover a pre-set area; the peripheral region surrounds the central region, wherein the pixel arraying density of the central region is greater than the pixel arraying density of the peripheral region. The display panel disclosed by the invention can solve the problem that a circuit is unstable since a large quantity of pixels are arranged in a high-resolution panel.

The invention relates to a multi-source heat pump cold and hot water unit integrating solar energy, air energy and sleeve accumulated energy. The multi-source heat pump cold and hot water unit is mainly composed of a solar thermal collector, an energy storage heat exchanger, an outdoor air heat exchanger, a compressor, a thermal storage water tank, a user side heat exchanger, a gas-liquid separator, a heat collecting water pump, a user circulating water pump, an electromagnetic valve, a motor-driven three-way reversing valve, a motor-driven four-way reversing valve, a start-stop valve, a throttling valve, a one-way valve and the like; according to different outdoor climatic conditions, multiple operation modes such as direct solar heat supply, living hot water produced by solar, solar heat accumulation, heat supply of an energy storage heat pump, heat supply of an air source heat pump, energy storage and air source heat pump combined heat supply, living hot water produced by an air source heat pump, cold supply of air source heat pump, air source heat pump cold accumulation, heat pump cold accumulation and production of life hot water, and cold accumulation cold supply are realized. The complementary utilization of air energy and solar energy and two-way utilization of cold and heat of a heat pump unit are realized, and one set of equipment is adopted to realize heating, refrigeration, energy storage and living hot water supply.

A fruits sorting apparatus includes: a conveyance device configured to convey a plurality of charged fruits from a detection area located on an upstream side to a sorting area disposed on a downstream side; an imaging device configured to photograph the fruits in the detection area of the conveyance device; a processor configured to detect a rotten fruit and a nonstandard fruit having an irregular shape or size based on images of the fruits and vegetables imaged by the imaging device; and a robot configured to pick up the rotten fruit and the nonstandard fruit detected by the processor in the sorting area.

The invention provides an AMOLED pixel compensation driving circuit, an AMOLED pixel compensation driving method and a display panel. The AMOLED pixel compensation driving circuit adopts a 7T1C structure and comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, a storage capacitor and an organic light emitting diode, wherein the first transistor is a driving transistor. A preceding-stage scanning signal Sn-1, a current line scanning signal and a control signal are combined to sequentially act ata reset stage, a threshold voltage compensation stage and a light-emitting stage of the AMOLED pixel compensation drive circuit, thereby enabling a current flowing through the organic light emittingdiode to be irrelevant to a threshold voltage V-th of the first transistor T1. Therefore, the influence of drifting of the threshold voltage V-th of the first transistor on the current flowing throughthe organic light emitting diode can be eliminated, and the problems of non-uniformity and instability of TFT electrical characteristics of the display panel can be solved.

The invention discloses a construction process of a multi-branch underground screen pipe, which comprises the following steps of: 1, preparing; 2, drilling in advance; and 3, drilling and laying the screen pipe: drilling a first section of horizontal main shaft hole and a first section of branch well hole and laying the screen pipe, drilling the next section of horizontal main shaft hole and the next section of branch well hole and laying the screen pipe, repeating the operation until completing the drilling of a plurality of branch well holes and the laying the screen pipe, the drilling of the last section of horizontal main well hole and the laying of the screen pipe of the horizontal main well holes. The invention has the advantages of reasonable design, high construction efficiency, low investment input and good use effect, is convenient for operation, can effectively increase the yield of a multi-branch horizontal well, and effectively solves the defects of high investment cost, larger construction risk, complex construction step and difficult realization of the steps, low yield of the multi-branch horizontal well subjected to the construction, and the like in the traditional construction process of the multi-branch horizontal well.

The invention provides preparation of a cyclodextrin metal organic framework carbon material and application of the cyclodextrin metal organic framework carbon material to water treatment. The preparation method comprises the following steps: firstly, enabling gamma-cyclodextrin and potassium hydroxide to react, so as to obtain a gamma-cyclodextrin metal organic framework (gamma-CD MOF); then carrying out high-temperature firing on the gamma-cyclodextrin metal organic framework under the protection, so as to obtain the cyclodextrin metal organic framework carbon material. According to the material provided by the invention, firstly, the problem that the gamma-CD MOF is not stable in water can be solved; secondly, the material can inherit porous properties of the gamma-CD MOF and the surface has abundant oxygen-containing functional groups, so that the material can be used as a novel water body heavy metal ion repairing material.

The invention belongs to a multi-quadrant photovoltaic energy storage and inversion integrated device. The integrated device comprises a photovoltaic cell power conversion device, an energy storage cell bidirectional energy conversion device, a DC bus energy bidirectional conversion device and the like. Owing to the integrated energy dispatching software based on bus voltage variation, the multi-quadrant photovoltaic, energy storage and inversion integrated multi-power flowing function is realized.

The invention provides a photovoltaic power generation power prediction method based on a deep belief network. The photovoltaic power generation power prediction method comprises the following steps of collecting historical meteorological data and photovoltaic power generation output data of a to-be-predicted region to construct a training data set; dividing the historical meteorological data intoa plurality of samples, preprocessing the samples and constructing a meteorological factor data matrix; clustering the meteorological factor data matrix by adopting a fuzzy C-means clustering algorithm; establishing a photovoltaic power generation power prediction model by using a deep belief network; optimizing the initial weight of the prediction model by adopting a particle swarm algorithm; inputting historical meteorological data in the training data set into the prediction model for training to obtain the optimal weight of each layer of the prediction model, and storing the optimal weight; and judging the meteorological factor category of the to-be-predicted day by adopting a fuzzy C-means clustering algorithm, and then inputting all samples, which belong to the same category as theto-be-predicted day, in the meteorological factor data matrix into the prediction model to obtain predicted photovoltaic power generation power.

The invention aims to provide a mobile authentication method, a mobile authentication device and a mobile authentication system. The mobile authentication method includes establishing matching relations between mobile device sides and wearable electronic device sides; transmitting to-be-authenticated information to wearable electronic devices when the to-be-authenticated information is acquired by the mobile device and connection conditions of the mobile device and the wearable electronic devices meet authentication conditions; enabling the wearable electronic devices to authenticate the to-be-authenticated information; transmitting authenticated information to the mobile device. Compared with the prior art, the mobile authentication method, the mobile authentication device and the mobile authentication system have the advantages that problems of instability and potential safety hazards due to loss of existing mobile devices can be solved by the aid of the wearable electronic devices which are difficult to lose; potential loss due to possible loss of the mobile device can be prevented, the problem of illegal use can be solved, and the mobile authentication usability and safety can be improved.

The invention provides a nucleic acid extractor which comprises a base, an outer shell connected with the base, and a main body which is positioned inside the outer shell and installed to the base, wherein the main body comprises a first motor set, a second motor set, a third motor set and an operating console fixed to the base; the first motor is fixed to the base; the second and third motor sets are driven by the first motor set and can move relative to the base; and the operating console comprises a clamp for automatically fixing a deep-hole plate and a heater for heating the deep-hole plate. The nucleic acid extractor has the advantages of high nucleic acid extraction efficiency, high operation precision and high stability.

A universal series bus (USB) frequency synchronous apparatus using a start of frame (SOF) signal generated by a master device to mark a reference interval is disclosed. The frequency synchronizing apparatus includes a frequency divider, a counter unit with a default pulse number, an arithmetic unit, and an adjusting unit. The frequency divider divides a high frequency signal by a variable frequency factor to generate a lock frequency signal. The counter is used to detect a pulse number of the lock frequency signal at a reference interval and obtain a pulse difference between the default pulse number and the detected pulse number of the lock frequency signal.

The invention discloses an electric vehicle permanent magnet synchronous motor torque control method combining calibration table look-up with voltage control closed-loop compensation flux-weakening current. The method comprises the steps: reducing the given Q-axis current through a D-axis current compensation value outputted by a voltage loop so as to guarantee that the output torque remains unchanged under the condition that the voltage loop works. According to the method, the torque control precision can be improved, the control stability of the permanent magnet synchronous motor of the electric vehicle is ensured, and information of flux weakening control, maximum torque-to-current ratio control and maximum torque-to-voltage ratio control is already contained in the calibration look-uptable so that the method is a high-efficiency control method.

The invention discloses a Chinese Simmental cattle FGF-1 gene as genetic markers of carcass meat quality. According to the method, the Chinese Simmental cattle genome DNA or a DNA sequence comprising the Chinese Simmental cattle FGF-1 gene is taken as a template, the functional region segment of the Chinese Simmental cattle FGF-1 gene is amplified by use of PCR primer pairs P1, P2 and P3, enzyme digestion and electrophoretic analysis are performed on restriction enzymes Xsp-I, Hae-III and Rsa-I by virtue of sequencing screening, and then the SNPs at the 8528th site, the 13970th site and the 72251th site of the second introns of the Chinese Simmental cattle FGF-1 gene can be determined (A is greater than T, A is greater than T and A is greater than C). The T allel gene and the TT genotype of the SNP1 site, the C allel gene and the CC genotype of the SNP2 site and the T allel gene and the TT genotype of the SNP3 site in the SNPs obtained by screening can be taken as effective molecular genetic markers for remarkably improving the carcass composition and meat quality traits of the Chinese Simmental cattle, and then can be used for selective molecular breeding under the assistance of early marking of the carcass composition and meat quality traits of the beef cattle.

The invention discloses a fixed wing aircraft autonomous deck landing method and system; the method and system build a relative motion model between the aircraft and a carrier, build an ideal glide path, convert an autonomous deck landing problem into a path tracking problem, use an aircraft six degrees of freedom non-linear motion model, consider coupling between aircraft longitudinal control with lateral course control, and model the carrier deck motions, so the system and method can approach more to the real motions and be more accurate in control. The method and system and improve the decklanding accuracy of the fixed wing aircraft under a carrier deck motion condition.

The invention provides a pure P-wave anisotropic wave field simulation method and belongs to the field of seismic wave migration in seismic wave exploration. The method comprises the following steps: reading a velocity model and anisotropic parameters including Thomsen parameter epsilon, Thomsen parameter delta and anisotropic dip angle beta in an anisotropic model, and then using the following formula to obtain the SV wave velocity: Vsv=Vp*(epsilon-delta)/C, wherein Vsv is the SV wave velocity, Vp is the P wave velocity, * is a product sign, and C is a constant; (2) multiplying the SV wave velocity obtained in step (1) by a constant to obtain a new shear wave velocity; (3) reading seismic data, inputting the new shear wave velocity obtained in step (2) and then using a finite difference method to realize wave field simulation of seismic waves in an anisotropic medium to obtain a wave field simulation result; and (4) using the wave field simulation result in step (3) to realize reverse-time migration imaging.

The invention provides a construction method of numerical simulation of fluid-solid coupling problem in hydraulic fracturing, comprising the steps of a) the display algorithm is employed to solve solid problems, comprising nodal acceleration, nodal speed and nodal displacement; b) the implicit algorithm is employed to solve fluid problems, comprising flow and pressure; c) the crack band model is employed to calculate the effect of fluid flow field to solid stress field respectively,thus realizing the calculation of fluid-solid coupling. The invention provides an effective numerical algorithm for numerical simulation of fluid-solid coupling problem in hydraulic fracturing; such algorithm can efficiently solve the unstable problem of calculation to numerical simulation of fluid-solid coupling problem in hydraulic fracturing. The computing platform established based on such method can simply and efficiently achieve numerical simulation under different working conditions, can be easily spread and applied to calculation and analysis of practical shale gas exploitation engineering.

The invention discloses a tower crane embedded-type intelligent monitoring system based on a field bus. The system mainly comprises a device sensing layer, a control access layer, a network communication layer and a management application layer, wherein a tower crane terminal device sensing layer and an onboard control access layer are in interconnection communication through a CAN (controller area network) bus communication network, and a CAN bus communication net is established; a main control platform system formed by a tower crane onboard main controller and an outer periphery device module thereof is the onboard control access layer; a tower crane field control center and a remote monitoring platform form a system management application layer; the information interaction of the onboard control access layer and the management application layer have multiple implementation modes; the operation situation, the fault situation and the alarming state of the field tower crane can be grasped timely by workers through the system management application layer. The system can monitor and control the operation working conditions of a single tower crane on line, provides reliable and accurate real-time information for managers, also provides convenience for managers to make a best control strategy, and improves the working efficiency.

The invention provides a supported gold nanocluster catalyst. The catalyst is prepared from an active component and a carrier, wherein the active component is gold nanoclusters, and the carrier is a CeO2 nanorod. By means of the extensive creative work of the inventor, the nano-gold clusters with ultra-small sizes are supported by the CeO2 nanorod; when being used as the carrier, the CeO2 nanorodcan stabilize the gold nanoclusters and provide oxygen vacancies, thus solving the problems that the gold nanoclusters have higher surface energy and are not stable; due to the synergistic effect thenanorod and the gold nanoclusters, the nanorod exposes the more active crystal plane of the CeO2 carrier, an oxygen species with higher activity is formed, and the catalytic activity of the supportedgold nanocluster catalyst is improved.