232 results about "Equilibrium point" patented technology

A self-powered medical device, for example a pacemaker uses the variations of blood pressure inside the heart or a major artery to create a mechanical resonance in an electromagnetic or piezoelectric generator. The resonance extends the time power is generated during the cardiac cycle. The pressure variations compress a bellows carrying the resonant generator. The inside of the bellows may be evacuated to a partial or full vacuum, and a spring restores the bellows to the desired equilibrium point, acting against the blood pressure. The current pulses are stored in a capacitor. Eliminating the battery allows dramatic miniaturization of the medical device to the point it can be implanted at the point of desired stimulation via a catheter.

A self-powered pacemaker uses the variations of blood pressure inside the heart or a major artery to create a periodic change in the magnetic flux inside a coil. The pressure variations compress a bellows carrying a magnet moving inside a coil. The inside of the bellows is evacuated to a partial or full vacuum, and a spring restores the bellows to the desired equilibrium point, acting against the blood pressure. The current pulses are stored in a capacitor. Eliminating the battery allows dramatic miniaturization of the pacemaker to the point it can be implanted at the point of desired stimulation via a catheter. The invention includes means of compensating for atmospheric pressure changes.

Micro-regional force application improves the control of the orthodontic movement of teeth in all six degrees of freedom. Micro regional force application utilizes an elastic repositioning appliance, a tooth positioner, a polymeric shell, or preprogrammed series of polymeric shells. The key components of the invention are the envelope of freedom, the force applicators, force couplers, counterpart coupling, vector modifiers, seating guides, decouplers, and forced balance points. Further, computerized finite element analysis determines the center of resistance and the center of rotation for each tooth to be moved. The present invention gently rotates and translates one or more teeth to a desired straight position within a treatment plan.

In an SSD controller reading from flash memory, subsequent to failure of an initial soft-decision decoding attempt based on a nominal LLR, soft-decision re-decoding attempts are made using compensated LLR soft-decision information sets, pre-calculated at respective read-equilibrium points corresponding to mean shifts and variance change in the actual charge-state distributions of the flash memory channel. According to embodiment, soft-decision re-decoding attempts are performed without a retry read, or overlapped with one or more retry reads. By overlapping re-decoding with one or more retry reads, the probability of successful decoding increases, the need for further retry reads diminishes, and throughput is improved. The LLR compensation becomes very effective over a large number of retry reads, improving decoding reliability and achieving close to optimal bit error rates, even in the presence of large channel variation.

Systems and methods of providing power as it is generated at a consumer's premises, the method comprising: providing at least one locally based renewable power system to a consumer; storing the power system's characteristics in a database; determining the consumer's customer variables; monitoring the consumer's customer usage to provide an actual customer usage; determining power system's available incentives; determining the aggregate cost of the power system; determining the break even point of the power system according to a discount rate, amortization period and aggregate cost of the power system; determining the consumers monthly payment according to the consumer's customer variables, the actual customer usage, break even point and the aggregate cost; and billing the consumer the consumers monthly payment.

The present invention relates to a system for use in rehabilitation and / or physical therapy for the treatment of injury or disease. The system can enable an amputee to proceed over any surface without overbalancing. In particular the system is self-adapting to adjust the torque moment depending upon the motion, the extent of inclination, and the surface topography.

The present invention provides apparatus featuring a signal processor or processing module that may be configured at least to: process signaling containing information about an equilibrium point of pump differential pressure and system pressure formulated in a hydronic domain by utilizing pump and system characteristic curve equations so as to yield system pressure and flow rate at any particular load and time in a pump hydronic system, including using a multi-dimensional sensorless conversion technique; and determine equivalent hydronic system characteristics associated with the pump differential pressure and flow rate to their corresponding motor power and speed reconstructed and remapped by using a discrete numerical approach, based at least partly on the signaling received. The signal processor or processing module may provide corresponding signaling containing information about the system pumping flow rate and pressure determined.

The present invention discloses a network safety risk evaluating system based on game theory. The system firstly collects network property data which comprises information of node address, service, application program, software leak, etc. from an evaluated network, describes with a first-order predicate logic, reasons with an XSB reasoning engine based on the description of first-order predicate logic, and obtaining the leak which is on the evaluated network system and can be used by an attacker, and a corresponding attack threat. Aiming at each attack threat, the system according to the invention establishes a game theoretical attack-defense model GTADM and calculates the game equilibrium point. The obtained attack probability is multiplied to the expected damage value of the attack to the attack target for obtaining the attack risk to the system. Thereby the risk level of nodes in the evaluated system is obtained and the security evaluating to the network is realized.

The invention discloses a multi-section reaction tower for polyoxymethylene dimethyl ether synthesis and a polyoxymethylene dimethyl ether synthesis process unit. A tower body of the multi-section reaction tower comprises at least two layers of reaction sections from top to bottom; each layer of reaction section is provided with a tower plate and forms a bent passageway; catalysts are arranged between the tower plates in a filling manner; gas ascension pipes are arranged between the adjacent layers of reaction sections; a gas phase outlet is formed in the tower top of the reaction tower; and each layer of reaction section is provided with an inlet with a valve and an outlet with a valve. According to the multi-section reaction tower for polyoxymethylene dimethyl ether synthesis and the polyoxymethylene dimethyl ether synthesis process unit, the conversion equilibrium point of the reaction is effectively controlled, the advancement of the reaction equilibrium toward bigger polymers is effectively deferred, the conversion rate and the selectivity are improved, the reaction is carried out under the conditions that the catalyst activity is relatively high and the temperature does not excessively influence the reaction equilibrium, and good conversion rate and selectivity are obtained.

The invention discloses a nonlinear modeling method and a linear trimming method for a composite rotor aircraft, and belongs to the technical field of control of composite rotor aircrafts. According to the method, the aerodynamic characteristics of all parts are analyzed, and a split modeling method is adopted to carry out dynamic modeling; on the basis of the model, combined with a quasi-Newton iteration method and a sequence quadratic programming method, a quasi-Newton-sequence quadratic programming method is proposed to dynamically balance the dynamic model of the composite rotor aircraft and make small disturbance linearity at the equilibrium point, so that an approximate linearized kinetic equation for the equilibrium point can be obtained. The dynamic model established by using the modeling method disclosed by the invention is high in confidence coefficient and simple in calculation, in addition, the new trimming method provided by the invention can avoid solving the inverse matrix of the objective function Hessian matrix, the calculation is simplified, the relatively high convergence speed is ensured, and the method can be used for researching the control method of the composite rotor aircraft.

A method for controlling a multivariable system according to one non-limiting embodiment includes receiving a plurality of limits, receiving a first quantity of goals each having a desired value, and receiving sensor feedback. The method further includes estimating a basepoint in response to the first quantity of goals, the plurality of limits, and the sensor feedback, wherein the basepoint includes a set of values corresponding to an equilibrium point at which a predetermined amount of enabled limits are met and a second quantity of goals are fulfilled according to a goal prioritization scheme. Predicted values from a mathematical model are compared to the sensor feedback, and the estimated basepoint is selectively adjusted in response to a difference between the predicted values and the sensor feedback in order to reduce the difference.

The invention discloses a method and equipment for evaluating an emotion state, promoting emotion balance and evaluating an emotion regulating effect. According to one embodiment, the method and the equipment are used for computing an emotion balance index showing flexibility information of an autonomic nervous system according to a power spectrum density in results of a frequency domain analysis on heart rate variability, which is a measurement for excursion from a low frequency component and a high frequency component in a heart rate signal to a balance frequency. In the embodiment, equipment is provided for acquiring a real-time heart rate signal and the real-time heart rate signal is processed by special equipment, a personal computer, hand-holding equipment or other processing devices.

A heavy dirty oil storage tank oil-water separation detection discharging method is disclosed. Demulsifiers are added into a thermal subsidence tank; dirty oil is mixed with water through stirring or ultrasonic wave; the storage tank is heated and the subsidence takes place for a period of time; then oil-water separation of the heavy dirty oil storage tank is detected, and discharging is performed. 1) Detection of remote control of the oil-water separation is performed; a servo motor is mounted at the upper part of the heavy dirty oil subsidence tank; one end of the servo motor is connected with an electromagnetic sensor and a floater for measuring the liquid level; sampling signals of the electromagnetic sensor and the float are communicated with a microprocessor and a computer control system. 2) The density of oil or emulsion at the height where the floater is located is calculated based on a equilibrium point position and the size of the buoyancy. 3) Data is transmitted to the computer control system; when the density values of the upper, middle, and lower layers of the oil tank approach control indexes, that is, when balance is reached, the lower, middle, and the upper layers are respectively sewage, emulsion, and free oil; and corresponding outlet valves are opened for discharging, respectively. According to the invention, the separation period of heavy dirty oil in the storage tank is shortened; the production efficiency is improved; and the energy consumption is reduced.

A distributed energy optimizing operation method based on a game theory comprises the following steps: S1, acquiring original data and parameters of each generator; S2, selecting a plurality of generators as game participants to establish a game model; S3, selecting an initial equilibrium point value in a strategy space of each decision variable; S4, according to the initial equilibrium point value, searching the optimal strategy of each game participant in the strategy space by a particle swarm algorithm; S5, sharing optimal strategy information of each game participant to each generator; S6,judging whether a system finds a Nash equilibrium point, and if the system finds the Nash equilibrium point, outputting the equilibrium point, and if the system does not finds the Nash equilibrium point, returning to the step S3. The output dispatching problem of distributed energy is solved in a non-cooperative game way under the premise that the minimum carbon emission is considered; the optimal output of each unit of a power system in each mode is solved so as to obtain the maximum economic benefit and the minimum cost under the same condition.

A method and system for achieving fusion is provided. The method includes providing laser source that generates a laser beam and a target that includes a capsule embedded in the target and filled with DT gas. The laser beam is directed at the target. The laser beam helps create an electron beam within the target. The electron beam heats the capsule, the DT gas, and the area surrounding the capsule. At a certain point equilibrium is reached. At the equilibrium point, the capsule implodes and generates enough pressure on the DT gas to ignite the DT gas and fuse the DT gas nuclei.

A method for obtaining a global optimal solution of general nonlinear programming problems includes the steps of first finding, in a deterministic manner, all stable equilibrium points of a nonlinear dynamical system that satisfies conditions (C1) and (C2), and then finding from said points a global optimal solution. A practical numerical method for reliably computing a dynamical decomposition point for large-scale systems comprises the steps of moving along a search path φt(xs)≡{xs+ t×ŝ, tε+} starting from xs and detecting an exit point, xex, at which the search path φt(xs) exits a stability boundary of a stable equilibrium point xs using the exit point xex as an initial condition and integrating a nonlinear system to an equilibrium point xd, and computing said dynamical decomposition point with respect to a local optimal solution xs wherein the search path is xd.

A system and method for controlling a digital pulse-width modulated power converter achieves a fast large-signal transient response while maintaining a slow response near the steady-state operating point in order to assure stability and to reduce the system's susceptibility to noise. Digital output error samples are processed through a gain scheduling block that applies a non-linear gain function to produce a weak loop response when the system is near its steady-state equilibrium point and a strong loop response when large transients are encountered. The resulting system maintains a fast transient response to large error signals while reducing noise and loop jittering and assuring loop stability.

The present invention discloses a multiple-degree-of-freedom controlled variable design-based output tracking robustness forecast control method. The method aims at a first-class smooth nonlinear system and adopts an RBF-ARX modeling method. In this way, a system mathematical model containing the bounded uncertain interference is identified. The structural characteristics of the model are fully utilized, and a plurality of variable linear polyhedron models capable of wrapping the non-linear dynamic system are constructed. Considering the state feedback control rate of a future input increment during the design of single-degree-of-freedom controlled variables in an infinite time-domain objective function, a possibly caused conservative property is given. The invention provides a multiple-degree-of-freedom controlled variable design-based and RBF-ARX model-based output tracking robustness forecast control method. Compared with the prior art, the unknown bounded interference of the system is taken into consideration. The information of system steady-state equilibrium points is not required for the design of a controller, while the degree-of-freedom of optimal control increments is effectively increased. Therefore, the method is better in robustness and higher in practical value.

The invention discloses a continuous sinking-mode efficient 3D printing method and equipment. The continuous sinking-mode efficient 3D printing method comprises the following steps: by utilizing the principle that after oxygen is applied to the liquid level of resin, oxygen molecules can form an oxygen molecule concentration equilibrium point in the resin and projecting or focusing a light source at the equilibrium point and a region below the equilibrium point, curing of photosensitive resin is initiated, a printing table adhered to a cured product is driven by a motor to continuously move downwards, meanwhile, the photosensitive resin supplements the cured region with the equilibrium point, and changed light of the light source is projected onto the equilibrium point to carry out continuous curing under the control of a program, so that 3D printing is finished. In the printing process, the concentration gradient of the oxygen molecules which permeate into the resin can be controlled by regulating an input parameter of applied oxygen. The continuous sinking-mode efficient 3D printing method and the equipment can dramatically increase the forming speed of the traditional 3D printing, are suitable for large 3D printing products and are simple in mechanism, convenient to operate, high in accuracy of the printed products and excellent in performance.

The invention discloses an RBF-ARX (Radial Basis Function-Autoregressive exogenous) model based quick robust predictive control method. Firstly, a nonlinear state-dependent RBF-ARX model of a controlled system is established in an off-line manner by adopting a data driving technique; secondly, polyhedrons capable of covering nonlinear dynamitic characteristics of the controlled system are constructed by utilizing the established nonlinear RBF-ARX model; afterwards, by utilizing a min-max optimization principle and an invariant set based design method, in a condition that the steady state equilibrium point information of the system is unknown, an RBF-ARX model based robust predictive control method capable of realizing an optimal output tracking through the solution of a convex optimizationproblem is designed; finally, in order to solve the problem of a heavy calculation amount existing in the on-line solution of the convex optimization problem, an off-line calculation method and an on-line comprehensive technique are combined in the quick robust predictive control method; and the RBF-ARX model based quick robust predictive control method is designed.

A remote control and automatic control switching system of an unmanned aerial vehicle (UAV) belongs to the field of UAV flight control and is characterized by comprising a remote control command detection module and a control switching module, wherein the remote control command detection module is used for detecting and quantizing the remote control command and the remote control / automatic control switching command of each flight control channel of the UAV and transmitting the detected remote control command to a flight control computer; the control switching module is used for switching the remote control and automatic control commands and sending the commands to each steering engine of the UAV; and when remote control is switched to automatic control, the flight control computer uses the finally obtained remote control command as the equilibrium point of control and controls flight on that basis, thereby realizing seamless switching from remote control to automatic control.

The present invention discloses a method for detecting the memory leakage of a heap operational program, is directed to solving a technical problem of the memory error detection of the heap operational program in terms of precision and efficiency, and provides a novel memory leakage detection method with improved precision and efficiency of the detection. The technical scheme comprises analyzing a source code of the program in terms of statement and morphology at first and generating an intermediate file; carrying out a pretreatment which includes slicing and transformation; obtaining an abstract state of a heap memory based on the definition of an extension type of a pointer variable in the program; employing a forward data flow iteration method to implement an in-process detection and an inter-process detection; and finally inspecting and counting results of the memory leakage detection. The method finds a good equilibrium point between precision and efficiency of a static analysis, accelerates the termination of an iterative algorithm, improves the precision and the efficiency of the detection, and has a strong scalability and a low storage overhead.

The invention discloses a runtime error analytical method based on abstract interpretation and model verification. The method includes the following steps that on the basis of the abstract interpretation theory, the program numerical variable value range is analyzed by the adoption of a forward iteration method, the variable value range information is obtained when program points are stable, and the iterative computations of loop nodes are achieved by the way that loop unrolling and delay widening are combined; the variable value range information at the relevant program points needing to be detected is converted to be in an assertion or hypothesis mode to be plugged into a program according to a runtime error type to be analyzed; the assertion or hypothesis programs are converted into a Boolean formula, wherein the Boolean formula comprises limiting conditions and attributes; the correctness of the attributes in the Boolean formula is judged through an SAT verifier, if correct, it shows that relevant runtime errors do not exist, if not correct, it shows that the relevant runtime errors exist, and relevant counter example paths are output. By means of the method, an equilibrium point is acquired between runtime error analysis precision and efficiency.

The invention belongs to the field of automobile active safety, and relates to an automatic driving vehicle entrance and exit ramp driving decision-making method based on a dynamic game. The method comprises the following steps that: 1: utilizing a DSRC (Dedicated Short Range Communications) method to identify a target vehicle; 2: judging whether two vehicles have a conflict or not, and applying aconflict time difference [Delta]T to judge the conflict between two vehicles; 3: establishing a game model, and applying a subgame perfect Nash equilibrium dynamic game theory to decide a vehicle intersection behavior; 4: calculating an equilibrium point, according to determined respective expected revenue, calculating a replicator dynamics equation, and constantly regulating the own passage probability of two vehicles through the opposite-side replicator dynamics equation; 5: judging the stability of the equilibrium point to select an optimal decision; and 6: driving according to the strategy of the stable equilibrium point. By use of the method, through the probability expectation of the game thought and a concept of loss in revenue, the game equilibrium point is combined to make an optimal passage decision in real time, and an efficient and simple method and thought can be opened up for a vehicle interaction decision.

The invention relates to a wind power magnetic suspension yaw motor control method based on model predictive control and belongs to the technical field of electrical engineering. According to the method, the model predictive control technology is used, and the suspension and yaw rotation processes of a magnetic suspension yaw motor is smoothly controlled in real time. When a wind direction changesand yaw is needed, firstly a rotor current converter finds an optimal control law through a cost function to control the current of a rotor, thus the rotor is suspended upwards and is maintained at asuspension equilibrium point, secondly a stator converter finds an optimal control law through a cost function to control the current of a stator, thus the yaw motor rotates to a wind position according to a specified rotation speed, at the same time the rotor converter finds an optimal control law through a cost function to control the current of a rotor, thus the rotor is maintained at the suspension equilibrium point, the coordinated control of the stator and the rotor can be realized without decoupling, the fast tracking ability and stability of a system are ensured, at the same time, theinfluence of external disturbance on system operation can be effectively suppressed, and the system performance in an entire suspension yaw rotation process is optimal in real time.