134 results about "Potential method" patented technology

Methods and systems for estimating patient-specific cardiac electrical properties from medical image data and non-invasive electrocardiography measurements of a patient are disclosed. A patient-specific anatomical heart model is generated from medical image data of a patient. Patient-specific cardiac electrical properties are estimated by simulating cardiac electrophysiology over time in the patient-specific anatomical heart model using a computational cardiac electrophysiology model and adjusting cardiac electrical parameters based on the simulation results and the non-invasive electrocardiography measurements. A patient-specific cardiac electrophysiology model with the patient-specific cardiac electrical parameters can then be used to perform virtual cardiac electrophysiology interventions for planning and guidance of cardiac electrophysiology interventions.

The present invention relates to systems and methods of enhancing prefetch operations. One potential method comprises fetching an object from a page on a web server. The method may further include storing, at a proxy server, caching instructions for the fetched object. The proxy server may be connected with the client and the object is cached at the client. Furthermore, the method may include identifying a prefetchable reference to the fetched object in a subsequent web page and using the caching instructions stored on the proxy server to determine if a fresh copy of the object will be requested by the client. Further, the method may include, based on the determination that the object will be requested, sending a prefetch request for the object using an If-Modified-Since directive, and transmitting a response to the If-Modified-Since directive prefetch request to a proxy client. The proxy client may then either serve the response to the client or a copy of the object stored at the proxy client, depending on the request for the object from the client.

Large amounts of data from user interactions with web resources is available as data logs. Analysis may be performed to process the data log in order to determine the characteristics of the user interactions. Data log analysis may include identifying page states, which may be sets of frequent attributes and values that occur together in a session. The data log analysis may also include generating semantic labels of page states, which may describe the function of pages corresponding to different page states. Text mining models may be used to determine the semantic labels. Analysis may also include aggregating sets of page paths to create page journeys. These page journeys may be aggregated over all users, all user sessions, or other subsets of the clickstream. In some embodiments, comparing page journeys may provide recommendations for potential methods to improve the site and enhance user experiences.

The invention discloses an improved potential grid method applied to floor cleaning robots, aiming to solve the problem that in an artificial potential method, a robot vibrates nearby a barrier while can not arrive at a target point or discover a path among close obstacles, and trap areas exist. The improved potential grid algorithm is based on a boustrophedon complete coverage path planning algorithm, allowing a robot to plan an overall cleaning path within a given context, and meanwhile possess a dynamic collision-free obstacle avoidance capability. According to the invention, a cleaning robot can perform cleaning after statically building a complete coverage path within a given context, and still smoothly realize collision-free obstacle avoidance even in the case of obstacles which are not recorded in a map file, thereby effectively reducing path dead nodes and cleaning blind spots.

The invention discloses preparation of a three-dimensional graphene manganese dioxide nano-composite modified electrode and a capacitive property test method thereof. An ionic liquid modified electrode is prepared firstly, and then three-dimensional graphene and manganese dioxide nanomaterial are electrodeposited on the surface of the ionic liquid modified carbon paste electrode by utilizing a constant potential method so that a three-dimensional graphene manganese dioxide nano-composite modified carbon paste electrode is obtained. The three-dimensional graphene manganese dioxide nano-composite modified electrode acts as a working electrode, a platinum sheet acts as an auxiliary electrode and a saturated calomel electrode acts as a reference electrode, and capacitive property of three-dimensional graphene manganese dioxide nano-composite material is tested by applying a cyclic voltammetry, an AC impedance method and a constant current charge and discharge method. The three-dimensional graphene manganese dioxide nano-composite modified electrode is simple in preparation method, high in single electrode capacitance and great in cycle performance so as to be suitable for rapidly testing capacitive property of super-capacitor electrode material.

The invention discloses a permanent magnet brushless motor sensorless starting method. The permanent magnet brushless motor sensorless starting method comprises the steps that firstly, a rotor is positioned at a specific position through a rotor prepositioning device, single-step acceleration is carried out according to the given single-step acceleration current and single-step acceleration time obtained by calculation, single-step acceleration is directly switched to closed loop acceleration after being carried out, rotor position signals in a three-phase suspended state are detected every fixed period, the power-on phase sequence is determined according to the rotor position signals, whether counter potential signals are stable or not is judged through a signal comparison method while closed loop acceleration is carried out, and when stable counter potential signals can be detected within one phase conversion period, a normal counter potential method is switched to for operation, wherein the single-step acceleration and the signal comparison method can ensure that a motor is started at the highest speed, and the closed loop acceleration process can ensure that the motor supplies power accurately in the acceleration start process and step-out is avoided. By means of the method, an efficient permanent magnet brushless motor can be started accurately, rapidly and efficiently, the optimization process is simple, universality is high, the success rate of starting can be improved greatly, no sensitivity to load changes exists, and the start program does not need to be changed when loads and the working station change within a certain range.

The invention discloses a route planning method based on a potential field method. The route planning method based on the potential field method is characterized by including the steps that according to the geographical environment determined from the flight starting point to the terminal point of an aircraft, feature information of barriers in the determined geographical environment is obtained abstractly and stored; resultant force of the aircraft and the terminal point is obtained by the adoption of the potential field method on the basis of the feature information; a current position is controlled to be updated on the basis of the resultant force. The technical problem that a route in aircraft route planning can not be adjusted in real time in the prior art is solved, and the technical effect of planning the route in real time is achieved.

A method for differentiating or promoting or inducing differentiation of stem cells into pluripotent cardiovascular progenitors (MCPs) by transiently inducing the expression of a single gene, namely Mesp1, is disclosed. Cells obtained by the method and their uses in research and clinical settings are also disclosed. Using genome wide transcriptional analysis, the inventors found that Mesp1 rapidly activates and represses a discrete set of genes, which form potential new targets for both therapy and for the identification of MCPs. Insights into the molecular mechanisms underlying the earliest step of cardiovascular specification and potential methods for dramatically increasing the number of cardiovascular cells for cellular therapy in humans are provided.

The invention relates to a calibration method for measuring the accuracy of high-temperature crack length through a direct current potential method. The method uses a thread hooking method and the direct current potential method to measure the crack length of a high-temperature alloy specimen. As the crack front at the fracture part of the specimen is arc-shaped, the intermediate crack length is the longest, and the crack length of the surface of the specimen is the shortest. The crack length measured by the potential method is compared with the average crack length, the surface crack length and the internal crack length measured through the thread hooking method, and the average crack length measured through the direct current potential measurement method is most consistent with the average crack length measured through the thread hooking method, so that the crack length can be calibrated through the thread hooking method.

The invention discloses a non-azeotropic refrigerant charge determining method. The non-azeotropic refrigerant charge determining method comprises the following three steps of (1) estimating the refrigerant charge; (2) according to the environment characteristic of regions with hot summer and cold winter, selecting at least four working situations for refrigerant charging and performance testing from high temperature to low temperature based on the estimated value in the step (1), injecting refrigerants of different masses to a test unit, and testing the refrigerating capacity, the energy efficiency ratio, the input power and the like through an enthalpy potential method; and (3) carrying out contrastive analysis on experiment results of the selected working situations and finally obtaining the range of the optimal refrigerant charge during whole-year operation. Through estimation, testing and contrastive analysis of the refrigerant charge, the non-azeotropic refrigerant charge can be determined accurately, performance of the unit is improved, and compared with a traditional method of briefly estimating the refrigerant charge, precision is higher, and the performance of the unit is better.

The invention discloses a method for determining charging quantity of freezing and cold storage equipment refrigerating fluid. The method includes the following three steps that (1), the charging quantity of the refrigerating fluid is estimated; (2), refrigerating fluid charging and performance testing are conducted by selecting at least four working conditions from a high temperature to a low temperature in accordance with the estimated value of the step (1) according to environment features of regions where it is hot in summer and cold in winter, the refrigerating fluid of different mass is charged into a test unit, and refrigerating capacity, the energy efficiency ratio, input power and the like of the test unit are tested through an enthalpy potential method; (3), test results of the selected working conditions are compared and analyzed, and finally the best charging quantity range of the refrigerating fluid used when the freezing and cold storage equipment operates all the year round is obtained. The charging quantity of the freezing and cold storage equipment refrigerating fluid can be accurately determined through estimation of the refrigerating fluid charging quantity, tests and comparison and analysis, performance of the unit is improved, the method is more accurate compared with a traditional method for simply estimating the charging quantity of the refrigerating fluid, and the unit performance is better.

The invention provides a method of analyzing hot-dip galvannealed coating, including: use epoxy resin for cold inserting, cutting sample, milling sample, finishing, alcoholizing and use nitric acid mixed solution for etching to obtain a gold-phase sample of the coating, use sodium chloride and white vitriol as electrolyte, adopts constant potential method to determine the texture chart and polarization curve of the coating of the obtained sample, to make qualitative and quantitative analysis on the coating, not only achieving a complete, real and clear texture of the hot-dip galvannealed coating but also effectively and really making qualitative and quantitative analysis on the hot-dip galvannealed coating.

The invention discloses a zeta electric potential real-time online detecting device of suspension colloid waste water. The device enables suspension colloid waste water to flow through a porous ceramic composite membrane pipe under the driving of a water suction pump by virtue of a streaming potential method; the streaming potential is measured by digital millivoltmeters which are positioned at two ends of the porous ceramic composite membrane pipe and are connected with an electrode, and the voltage difference at two ends is measured by a differential pressure transmitter. The streaming potential and the pressure difference at two ends are collected in real time through a PLC (programmable logic controller); the zeta electric potential is obtained through calculation according to a mathematic model, and is in communication with an upper position machine WINCC so as to monitor and manage the zeta electric potential as well as optimize and control the input quantity of flocculating agents; and water resource is purified, and the economical cost is also saved.

The invention relates to an air conditioner refrigerating capacity and heating capacity testing method and an air pipe box heat meter applicable to the method. The air pipe box heat meter comprises an air pipe box, a freezing water system and a measurement control device, wherein the freezing water system comprises a freezing water coiled pipe arranged in the air pipe box; and the air pipe box is internally provided with a heating device, a humidifying device and a draught fan. The measurement method comprises the following steps that after an air conditioner starts and is led into an air pipe box; and the measurement control device controls work states of the freezing water system, the heating device, the humidifying device and the draught fan so that a dry ball temperature and a wet ball temperature of air which flows out of the air pipe box are the same as a dry ball temperature and a wet ball temperature of air which flows into an air inlet of the air conditioner to be measured; and therefore, the refrigerating capacity and the heating capacity of the air conditioner to be measured are calculated. According to the air conditioner refrigerating capacity and heating capacity testing method and the air pipe box heat meter applicable to the method, the problems that the existing method can not independently measure the refrigerating capacity and the heating capacity of the air conditioner and can not be used as an auxiliary testing method of an enthalpy potential method, and the manufacturing cost of needed equipment is high are solved.

The invention discloses a simulation method of a graphene doped structure. The method comprises the following steps of establishing an atom structure model of intrinsic graphene; doping the intrinsicgraphene; optimizing the doped graphene structure; and performing simulation calculation on the structure, the energy band, the state density and the current density of the intrinsic graphene and thedoped graphene by means of a density functional theory and plane wave pseudo-potential method. The method realizes simulation calculation on the structure, the energy band, the state density and the current density of the intrinsic graphene and the Pt/Pd atom doped graphene. The method discloses a fact that the band gap of the graphene can be opened through doping the Pt/Pd atoms into the intrinsic graphene, thereby improving conductivity of the graphene; and through increasing the content of the doping atoms Pt, the band gap of the doped structure can be increased, thereby realizing higher density of the energy band curves and increasing charge transfer degree.

The invention discloses a nano-porous palladium metal catalyst having an even three-dimensional continuous mesh-shaped porous structure. The nano-porous palladium metal catalyst is prepared by that analloy flake containing Cu and Pd according to atom number of 75:25 is performed with selective corrosion of dissolved copper with a constant potential method; then, the obtained product is dipped inPdCl2 and HClO4 mixture solution for replacement reaction to remove residual copper atom so as to prepare the nano-porous palladium metal catalyst. The nano-porous palladium metal catalyst has big specific surface area, greatly improves catalytic activity in catalysis application, needs no substrate loading and has simple preparing method and technology and relatively low cost.

The invention discloses a method for monitoring leakage at the joints of an underground diaphragm wall. Based on the steel cage structure of the underground diaphragm wall, electrode measuring lines are arranged in the underground diaphragm wall; each electrode measuring line is provided with a plurality of electrode measuring points; and the leakage of the underground diaphragm wall is monitoredthrough adopting a natural potential method. With the method of the invention adopted, construction can be convenient; drilling is not required; construction costs can be decreased; no damage is caused to the wall; the measuring points are close to leakage point positions, so that detection accuracy and accuracy can be improved; the leakage at the joints of the underground diaphragm wall can be positioned; the leakage condition of the underground diaphragm wall can be continuously monitored in the later stage; technical blank in arranging electrodes in the underground diaphragm wall and applying the natural potential method to detect and monitor the leakage positions of the underground diaphragm wall can be filled; and great guidance can be provided for the safe excavation of a foundationpit.

Large amounts of data from user interactions with web resources is available as data logs. Analysis may be performed to process the data log in order to determine the characteristics of the user interactions. Data log analysis may include identifying page states, which may be sets of frequent attributes and values that occur together in a session. The data log analysis may also include generating semantic labels of page states, which may describe the function of pages corresponding to different page states. Text mining models may be used to determine the semantic labels. Analysis may also include aggregating sets of page paths to create page journeys. These page journeys may be aggregated over all users, all user sessions, or other subsets of the clickstream. In some embodiments, comparing page journeys may provide recommendations for potential methods to improve the site and enhance user experiences.

The invention relates to an anesthesia detector, which comprises a signal generator, a paster, and the receiving optical fiber and transmitting laser fiber on the paster, analyzing circuit, data collecting circuit, and data analyzing system. The invention uses sound induction NIRS method to test the oxygen density of brain to test the brain metabolism, with the advantages of sound induction potential method and near-infrared laser oxygen testing method. The invention has high response as 0.1s, low cost and simple structure. And improve can improve the anesthesia quality, to judge the anesthesia depth.