46results about How to "Overcome the defects of failure" patented technology

The invention discloses an intelligent vehicle path search method and system based on road risk assessment and can solve the problem that an existing intelligent vehicle path search method cannot achieve path search under many circumstances or cannot achieve accurate path search. The method includes the steps of S1, modeling a road where a vehicle travels into a two-dimensional model formed by a plurality of square grids with identical side length; S2, under the principle that grid risk assessment value is minimum, using a heuristic search algorithm to search an optimal grid path from the grid where the central position of the head of the vehicle is located to the destination area grid, wherein the grid assessment value is obtained by calculating environmental information sensed by a vehicle sensor.

The invention relates to an ultra-low signal-to-noise ratio medium and high orbit satellite target ISAR imaging method, and mainly relates to the technical field of inverse synthetic aperture radar imaging. The method provided by the invention comprises the steps that the slant range course between a ground radar and a target satellite is calculated by using a target satellite orbit and the phasecenter position of a radar antenna, and pulse compression is carried out on original echo data received by the radar; according to the slant range course and radar imaging geometric parameters, the curvature walk of a target envelope is corrected; the delay phase of an ionized layer is compensated along azimuth, and a linear model is used to correct an envelope alignment error caused by a radar geometric parameter measurement error and a satellite orbit measurement error; the translation phase of the target is compensated, and fast Fourier transform (FFT) along azimuth is carried out to acquire an initial ISAR image; and finally, the quadratic translation phase error of the target is estimated and compensated according to the initial ISAR image, so as to acquire a final medium and high orbit satellite target ISAR image.

Disclosed is a dynamic detection method of a Shellcode. The method comprises the steps that network data flow is firstly grabbed and divided, and a plurality of execution links are obtained; then an operating system breakpoint is triggered to be abnormal, and the register value and internal storage content in the abnormality triggering process are used as an initial register value and internal storage content to be stored; finally, the execution links are executed in sequence, meanwhile, whether an endless loop or operating system abnormality occurs or not is detected in the execution process of each execution link, the current execution link has no Shellcode if the endless loop or operating system abnormality occurs, and otherwise whether the current execution link has the Shellcode or not is detected in a starting method, and detection is completed. According to the method, the Shellcode with the code obfuscation technology can be detected, the virtualization technology is not adopted, deployment is easy, the Shellcode capable of finding virtualization environment can be detected effectively, and the probability of Shellcode detection exposure is greatly reduced.

The invention relates to a graphene coated lithium battery cathode material and a preparation method thereof. The graphene coated lithium battery cathode material is prepared from the following components in parts by weight: 15-25 parts of graphene oxide, 80-85 parts of active material, 5-10 parts of functional material, 3-5 parts of conductive material and 3-5 parts of binding material, wherein the functional material is 60% lithium iron nitrate solution; the cathode material is lithium manganate; the conductive agent is flake graphite. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the graphene coated lithium battery cathode material, thus improving self-discharge of the whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that the lithium batteries can be stored for a longer time under the condition that users do not charge the electric appliances after using the electric appliances.

The invention discloses a spherical array sound source direction-of-arrival estimation method based on an atomic norm. The method comprises the following steps that (1) a spherical microphone (2) array composed of Q microphones (2) is constructed; (2) a sound source (1) radiates sound waves to the spherical microphone (2) array; (3) a sound source direction-of-arrival measurement model is established, and a sound pressure signal matrix P<five-pointed star> measured by the microphone (2) is constructed; (4) a covariance matrix GTb(u^)G<H> is established; and (5) the covariance matrix GTb(u^)G<H> is resolved by using a spherical ESPRIT algorithm to determine the direction of arrival of the sound source. According to the method, the defect that the spherical ESPRIT fails under the high-frequency, coherent sound source or few-data snapshot working condition can be overcome, the DOA estimation precision of the sound source under the low SNR working condition is remarkably improved, and themethod is still effective even in a common test environment with reverberation.

The invention discloses antifreezing water-based metal cutting fluid. The cutting fluid comprises an oiliness additive, an aqueous additive and water; the aqueous additive comprises a glycol compound, a hydrophilic surfactant, a chelating agent, an aqueous antirust agent, an aqueous bactericide, and an antifoaming agent. The antifreezing water-based metal cutting fluid has good antifreezing performance, and can stably exist in a condition at 20 DEG C; the product has good cooling, cleaning, rust preventing, lubrication and other effects, and defects of bad antifreezing effect of the prior water-based metal cutting fluid and failure of the cutting fluid due to easy demulsification at a low temperature are overcome.

The invention relates to a high-purity sulfur / charcoal-coated lithium cobalt oxide positive electrode material and a preparation method thereof. The high-purity sulfur / charcoal-coated lithium cobalt oxide positive electrode material is prepared from the following components by weight: 30 parts of a sulfur / charcoal composite material, 60 parts of lithium cobalt oxide, 25 parts of a lithium ferric nitrate solution with a concentration of 45%, 3 parts of flake graphite and 3 parts of a bonding material. The high-purity sulfur / charcoal-coated lithium cobalt oxide positive electrode material overcomes the defect of failure caused by self-discharging of a protection plate of a lithium ion battery, so self-discharging of a whole battery pack is improved, the purpose of prolongation of the storage time of the lithium battery is achieved, and it is guaranteed that the lithium battery can be stored for a long time under the condition that a user does not charge an electric appliance after usage.

The invention relates to an efficient graphene coated lithium cobalt oxide battery cathode material and a preparation method thereof. The efficient graphene coated lithium cobalt oxide battery cathode material is prepared from the following components in parts by weight: 30 parts of graphene oxide, 100 parts of active material, 15 parts of functional material, 20 parts of conductive material and 20 parts of binding material, wherein the functional material is 60% lithium iron nitrate solution; the cathode material is lithium cobalt oxide; the conductive agent is flake graphite. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the efficient graphene coated lithium cobalt oxide battery cathode material, thus improving self-discharge of the whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that the lithium batteries can be stored for a longer time under the condition that users do not charge the electric appliances after using the electric appliances.

The invention discloses an expansion assembly, which comprises a screw, an expansion sleeve, a nut, a washer and an elastic ring, wherein one end of the screw is provided with an inverted cone, whilethe other end is provided with a thread section; the expansion sleeve is movably sleeved on the screw and is provided with a notch for the deformation and expansion of the expansion sleeve; the nut isarranged on the thread section of the screw and can expand the expansion sleeve when the nut rotates; the washer is positioned between the expansion sleeve and the nut; and the elastic ring is movably sleeved on the screw and contacts the inner wall of the expansion sleeve. The expansion assembly is convenient to operate and replace under special conditions, and does not increase production cost.

The invention relates to a high-efficiency sulfur / charcoal-coated lithium cobalt oxide positive electrode material and a preparation method thereof. The high-efficiency sulfur / charcoal-coated lithium cobalt oxide positive electrode material is prepared from the following components by weight: 50 parts of a sulfur / charcoal composite material, 65 parts of lithium cobalt oxide, 20 parts of a lithium ferric nitrate solution with a concentration of 45%, 13 parts of flake graphite and 13 parts of a bonding material. The high-efficiency sulfur / charcoal-coated lithium cobalt oxide positive electrode material overcomes the defect of failure caused by self-discharging of a protection plate of a lithium ion battery, so self-discharging of a whole battery pack is improved, the purpose of prolongation of the storage time of the lithium battery is achieved, and it is guaranteed that the lithium battery can be stored for a long time under the condition that a user does not charge an electric appliance after usage.

The invention belongs to the technical field of image defogging, and discloses an image defogging method and system, computer equipment, a storage medium and a terminal.The image defogging method comprises the steps that a cumulative distribution function is constructed by counting the adjacent gray probability of a haze image, and the average threshold value of pixels is obtained according to the concentrated distribution degree of the gray levels of the pixels; according to the maximum connectivity of the sky area, obtaining a sky area and a non-sky area which are roughly segmented; the difference between pixel gray levels of the sky and the non-sky area is enhanced through guiding filtering, and accurate segmentation of the sky area and the non-sky area is achieved through the Otsu algorithm; the transmissivity of the sky area is estimated through logarithmic adaptive transformation, the transmissivity of the non-sky area is estimated through an improved dark channel prior algorithm, and image defogging is achieved by synthesizing the transmissivity of corresponding pixels of the sky area and the transmissivity of corresponding pixels of the non-sky area. The atmospheric light value Ac of the pixel channel can be accurately obtained by calculating the gray value of the pixel point, and the defect that a dark channel prior algorithm fails in bright areas such as the sky is overcome.

The invention provides a compound prestressed anchor cable capable of improving anti-shear performance of an anchorage structure, and belongs to the technical field of rock mass reinforcing. The anchor cable comprises a guiding cap, steel strands, a tensioner ring, a tightening ring, a sleeve and a grouting pipe; the sleeve is arranged nearby a sliding face or a potential sliding face, thus, the anti-shear effect of the anchorage structure can be effectively improved, and the defect that deformation is severe and even a slope is instable and is damaged due to the fact that a traditional prestressed anchor cable is short of the anti-shear capacity is overcome. Compared with the traditional prestressed anchor cable, according to the compound prestressed anchor cable, the arrangement distance between anchor cables can be increased, and meanwhile, the number of the anchor cables is decreased, so that related materials, time and fund investment are saved. The compound prestressed anchor cable capable of improving the anti-shear performance of the anchorage structure has the prominent advantages that the process is simple, operability is high, resources are saved, and the position of the anti-shear structure is controllable.

The invention relates to a sulfur / carbon coated lithium manganate cathode material and a preparation method thereof. The sulfur / carbon coated lithium manganate cathode material is prepared from the following components in parts by weight: 15-25 parts of sulfur / carbon composite material, 80-85 parts of active material, 5-10 parts of functional material, 4-8 parts of conductive material and 4-8 parts of binding material, wherein the functional material is 60% lithium iron nitrate solution; the cathode material is lithium manganate; the conductive agent is flake graphite. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the sulfur / carbon coated lithium manganate cathode material, thus improving self-discharge of the whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that the lithium batteries can be stored for a longer time under the condition that users do not charge the electric appliances after using the electric appliances.

The invention relates to an efficient sulfur / carbon doped lithium cobalt oxide cathode material and a preparation method thereof. The efficient sulfur / carbon doped lithium cobalt oxide cathode material is prepared from the following components in parts by weight: 30 parts of sulfur / carbon composite material, 95 parts of active material, 3 parts of functional material, 6 parts of conductive material and 6 parts of binding material, wherein the functional material is 60% lithium iron nitrate solution; the cathode material is lithium cobalt oxide; the conductive agent is flake graphite. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the efficient sulfur / carbon doped lithium cobalt oxide cathode material, thus improving self-discharge of the whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that the lithium batteries can be stored for a longer time under the condition that users do not charge the electric appliances after using the electric appliances.

The invention relates to a lithium battery cathode material. The lithium battery cathode material is prepared from the following components in parts by weight: 85-95 parts of active material, 3-8 parts of functional material, 3-5 parts of conductive materials and 3-5 parts of binding material, wherein the functional material is 60% lithium iron nitrate solution; a cathode material is lithium cobalt oxide; the conductive agents comprise a main conductive agent and an auxiliary conductive agent; the main conductive agent is conductive graphite; the auxiliary conductive agent is flake graphite. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the lithium battery cathode material, thus improving self-discharge of the whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that the lithium batteries can be stored for a longer time under the condition that users do not charge the electric appliances after using the electric appliances.

The invention provides a control method of rolling torque under a large attack angle and a flight control system. According to the control method, the duty ratio of a jet flow serves as a control quantity to control the rolling moment, under the condition that a constant supply air pressure is guaranteed, the duty ratio of the jet flow is controlled through a high-frequency electromagnetic valve,the speed of the jet flow in an air outlet time period is kept constant, and the speed of the jet flow in an air closing time period is zero, therefore the control effect of a dead zone without a rudder effect is achieved. A jet flow exciter is connected to the flight control system to replace a traditional control surface, the defect that the traditional control surface loses efficacy under the condition of large attack angle flow separation is overcome, and the flight envelope of an aircraft is further widened.

The invention relates to a modified sulfur / charcoal coated lithium nickelate positive electrode material and a preparation method thereof. The modified sulfur / charcoal coated lithium nickelate positive electrode material is prepared from the following components by weight: 40 parts of a sulfur / charcoal composite material, 50 parts of lithium nickelate, 20 parts of a lithium ferric nitrate solution with a concentration of 45%, 5 parts of flake graphite and 5 parts of a bonding material. The modified sulfur / charcoal coated lithium nickelate positive electrode material overcomes the defect of failure caused by self-discharging of a protection plate of a lithium ion battery, so self-discharging of a whole battery pack is improved, the purpose of prolongation of the storage time of the lithium battery is achieved, and it is guaranteed that the lithium battery can be stored for a long time under the condition that a user does not charge an electric appliance after usage.

The invention relates to a lithium ion battery cathode material and a preparation method thereof. The lithium ion battery cathode material is prepared from the following components in parts by weight: 75-80 parts of active material, 10-15 parts of functional material, 5-7 parts of conductive materials and 5-7 parts of binding material, wherein the functional material is 65% lithium iron nitrate solution; the cathode material is lithium cobalt oxide; the conductive agents comprise a main conductive agent and an auxiliary conductive agent; the main conductive agent is conductive graphite; the auxiliary conductive agent is flake graphite. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the lithium ion battery cathode material, thus improving self-discharge of the whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that the lithium batteries can be stored for a longer time under the condition that users do not charge the electric appliances after using the electric appliances.

The invention relates to a modified graphene-doped lithium nickelate battery cathode material and a preparation method thereof. The modified graphene-doped lithium nickelate battery cathode material is prepared from the following components in parts by weight: 30 parts of graphene oxide, 60 parts of lithium nickelate, 25 parts of 45% lithium iron nitrate solution, 3 parts of flake graphite and 3 parts of binding material. The modified graphene-doped lithium nickelate battery cathode material overcomes the defect of failure of lithium ion batteries caused by self-discharge of protection boards, so that self-discharge of the whole battery pack is improved, the aim of prolonging the storage time of lithium batteries is achieved, and the lithium batteries can be stored for a longer time under the condition that users do not charge electric appliances after using the electric appliances.

The invention relates to a modified graphene-coated lithium nickelate positive electrode material of a battery and a preparation method thereof. The modified graphene-coated lithium nickelate positive electrode material is prepared from the following components by weight: 50 parts of graphene oxide, 40 parts of lithium nickelate, 30 parts of a lithium ferric nitrate solution with a concentration of 45%, 8 parts of flake graphite and 8 parts of a bonding material. The modified graphene-coated lithium nickelate positive electrode material overcomes the defect of failure caused by self-discharging of a protection plate of a lithium ion battery, so self-discharging of a whole battery pack is improved, the purpose of prolongation of the storage time of the lithium battery is achieved, and it is guaranteed that the lithium battery can be stored for a long time under the condition that a user does not charge an electric appliance after usage.

The invention proposes a control method and a flight control system for the rolling moment at a large attack angle. The control method uses the duty ratio of the jet as the control amount to control the rolling moment. Under the condition that the supply air pressure is kept constant, the duty ratio of the jet is controlled by a high-frequency solenoid valve, which makes the speed of the jet flow Keep constant, and the speed is zero during the air-holding time period, thereby realizing the control effect of no rudder effect dead zone. The invention connects the jet exciter with the flight control system, replaces the traditional rudder surface, overcomes the failure of the traditional rudder surface in the case of flow separation at a large attack angle, and further widens the flight envelope of the aircraft.

The invention discloses a high-precision positioning system based on residual modeling and a GNSS integrated inertial navigation system. The system mainly comprises a preprocessing module, a point cloud registration module and a repositioning module. The method is mainly based on residual modeling, the accuracy and robustness of a matching algorithm are improved by modeling residual distribution into a mixed probability model, hidden variables, residual distribution parameters and rigid transformation are decoupled through an expectation maximization algorithm, and efficient alternate optimization solving is achieved. Accurate lane-level map information in the structured urban environment is given. According to the method, a real-time, accurate and robust positioning result can be output in an open and high-dynamic urban scene, and the method can be widely applied to the fields of unmanned positioning navigation, advanced aided driving technologies and the like.

A multi-domain information based ground wave radar first-order echo spectrum extracting method in a strong interference environment includes forming a ground wave radar distance domain-Doppler-azimuth polydomain spectrum through utilizing a multi-channel ground wave radar distance-Doppler spectrum subjected to wave beam formation and Chebyshev weight selection, setting necessary window and restriction conditions in a distance domain, a Doppler domain and an azimuth domain, calculating a first-order echo spectrum power in a multi-domain value window and the restriction condition, enhancing he first-order echo spectrum and reducing interference power for achieving an aim of jamming prevention, and acquiring first-order echo spectrum peak value frequency and spectrum widening volume through maximum signal to interference plus noise ratio searching and implementing first-order echo spectrum extraction. According to the invention, a defect of failure of a prior first-order echo spectrum extraction method in a strong interference environment is made up. Through configured ground wave radar multi-dimensional spectrum, different features of first-order echo, and ionized stratum and ship echo interference in multiple domains are considered comprehensively and a corresponding anti-interference extraction strategy is made, so that ground wave radar first-order echo spectrum effective extraction is realized.

The invention relates to a lithium battery cathode composition. The lithium battery cathode composition is prepared from the following components in parts by weight: 85-95 parts of active material, 3-8 parts of functional material, 3-5 parts of conductive materials and 3-5 parts of binding material, wherein the functional material is 70% lithium iron phosphate solution; a cathode material is lithium manganate; the conductive agents comprise a main conductive agent and an auxiliary conductive agent; the main conductive agent is conductive graphite; the auxiliary conductive agent is flake graphite. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the lithium battery cathode composition, thus improving self-discharge of the whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that the lithium batteries can be stored for a longer time under the condition that users do not charge the electric appliances after using the electric appliances.

The invention relates to a modified graphene coated lithium manganate battery cathode material and a preparation method thereof. The modified graphene coated lithium manganate battery cathode material is prepared from the following components in parts by weight: 30 parts of graphene oxide, 60 parts of lithium manganate, 25 parts of 45% lithium iron nitrate solution, 3 parts of flake graphite and 3 parts of binding material. The modified graphene coated lithium manganate battery cathode material has the effect of overcoming the defect of lithium ion battery failure caused by self-discharge of protection boards, thus improving self-discharge of a whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that lithium batteries can be stored for a longer time under the condition that users do not charge the lithium batteries after using electric appliances.

The invention relates to an efficient sulfur / carbon coated lithium nickelate cathode material and a preparation method thereof. The efficient sulfur / carbon coated lithium nickelate cathode material is prepared from the following components in parts by weight: 45 parts of sulfur / carbon composite material, 45 parts of lithium nickelate, 30 parts of 45% lithium iron nitrate solution, 8 parts of flake graphite and 8 parts of binding material. The efficient sulfur / carbon coated lithium nickelate cathode material overcomes the defect of failure of lithium ion batteries caused by self-discharge of protection boards, so that self-discharge of the whole battery pack is improved, the aim of prolonging the storage time of lithium batteries is achieved, and the lithium batteries can be stored for a longer time under the condition that users do not charge electric appliances after using the electric appliances.

The invention relates to a novel lithium ion battery cathode material. The novel lithium ion battery cathode material is prepared from the following components in parts by weight: 70-75 parts of active material, 5-10 parts of functional material, 4-7 parts of conductive materials and 4-7 parts of binding material, wherein the functional material is 60% lithium iron nitrate solution; the cathode material is lithium manganate; the conductive agents comprise a main conductive agent and an auxiliary conductive agent; the main conductive agent is conductive graphite; the auxiliary conductive agent is flake graphite. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the novel lithium ion battery cathode material, thus improving self-discharge of the whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that the lithium batteries can be stored for a longer time under the condition that users do not charge the electric appliances after using the electric appliances.

The invention relates to a novel lithium ion battery cathode composition. The novel lithium ion battery cathode composition is prepared from the following components in parts by weight: 70-75 parts of active material, 5-10 parts of functional material, 4-7 parts of conductive materials and 4-7 parts of binding material, wherein the functional material is 70% lithium iron phosphate solution; the cathode material is lithium chromate; the conductive agents comprise a main conductive agent and an auxiliary conductive agent; the main conductive agent is conductive graphite; the auxiliary conductive agent is flake graphite. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the novel lithium ion battery cathode composition, thus improving self-discharge of the whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that the lithium batteries can be stored for a longer time under the condition that users do not charge the electric appliances after using the electric appliances.

The invention relates to a modified graphene coated lithium manganate battery cathode material and a preparation method thereof. The modified graphene coated lithium manganate battery cathode material is prepared from the following components in parts by weight: 60 parts of graphene oxide, 30 parts of lithium manganate, 18 parts of 45% lithium iron nitrate solution, 1 part of flake graphite and 1 part of binding material. The modified graphene coated lithium manganate battery cathode material has the effect of overcoming the defect of lithium ion battery failure caused by self-discharge of protection boards, thus improving self-discharge of a whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that lithium batteries can be stored for a longer time under the condition that users do not charge the lithium batteries after using electric appliances.