84 results about "Safety criteria" patented technology

A remote medical device programming system and method are provided for monitoring a communication signal during a remote programming procedure and generating a communication status signal for presentation on a display. The communication signal monitoring may include monitoring a communication link bandwidth on a communication network linking a remote programmer to a central programmer. The communication signal monitoring may also include monitoring a telemetry signal strength between the remote programmer and the medical device being programmed. The system and method further provide a fail-safe response to a communication status signal that does not meet predetermined safety criteria.

The invention discloses a calculation method of power supply capability of a power distribution system. The calculation method is characterized in that the 'N-1' safety criterion is adopted as the premise, the interconnection relation of a main transformer is adopted as the basis, the upper-lower level coordination relation of the power distribution system is fully considered, the influence of load transfer limit of medium-voltage connection and short-time overload of the high-voltage main transformer are considered, and the power supply capability of the power distribution system can be accurately estimated, so that the deficiency of the load supply capability estimation on quantity when the single voltage level is only considered is avoided; the limit of the whole load supply capability of the power distribution system can be accurately mastered, so that the planning and the construction of the power distribution system is guided; and when the regional load increases in certain degree, the requirement for load increase is met by discovering the power supply capability of the existing power supply facilities. According to the method, the limit utilization ratio of the power distribution equipment can be determined on the premise of meeting the safety of the system and reference for a supply transferring scheme can be provided when the equipment fails, thus the operation scheduling of the power distribution system is guided and the method is beneficial to the effective use of the power distribution system facilities in power supply enterprises.

A laser transmitting system includes a laser source configured to transmit a laser beam at an original transmit intensity. The system also includes a laser intensity adjusting mechanism positioned in the path of the transmitted laser beam. The laser intensity adjusting mechanism is controllable to reduce the intensity of the laser beam from the original transmit intensity. The system also includes a controller coupled to the laser intensity adjusting mechanism. The controller is configured to automatically control the laser intensity adjusting mechanism based upon a safety criteria. Methods of controlling a laser transmitting system are also provided.

An aft attachment for an aircraft engine assembly. The attachment has a double boomerang structure including two three-point shackles that are duplicated: only four attachment points are present at the engine mount and two at the engine, the failsafe function being ensured by the dual structure. This attachment design does not sacrifice safety criteria, while providing a more lightweight structure.

The invention belongs to a design technology of reactors, and in particular relates to a first circulation 18-month refuelling and loading method n a reactor core of a pressurized water reactor nuclear power station. According to the method, aiming at the reactor core consisting of 177 group of fuel assemblies, in the first circulation, gadolinium-containing fuel assemblies are used as part of fuel assemblies, Gd2O3 is a combustible toxic material, Gd2O3 and UO2 in gadolinium-containing fuel rods of the gadolinium-containing fuel assemblies are mixed and uniformly dispersed in fuel core blocks, and 2%-10% of Gd2O3 is contained in the gadolinium-containing fuel core blocks by weight percent. According to the method, under the premise of meeting various safety criterions, the condition that the natural circulation length is 482 equivalent full power days is met; and compared with the conventional method of using solid combustible toxic materials of borosilicate glass in the first circulation, the method has the advantage that the circulation length is prolonged by 147 equivalent full power days and is equivalent to the balance circulation length of 18-month refueling, and is quietly high in economy and operation flexibility.

The invention relates to a voltage stability analyzing method and device, and in particular relates to a voltage stability analyzing method and device based on short circuit capacity. The main operating method comprises the following steps of: A, deriving the relation between the load busbar voltage and short circuit capacity by an analytic method according to a load node Thevenin's equivalent circuit; B, based on the relation between the load busbar voltage and short circuit capacity, deriving the minimum short circuit capacity keeping the load busbar voltage stable; C, solving the short circuit capacity provided by a system side by a two point method; and D, establishing a busbar voltage stability margin measuring index and a voltage safety criterion. Based on the load busbar short circuit capacity and by analyzing the voltage stability problem on the load side and the system side, the invention provides a new electric system voltage stability analyzing method which overcomes the defects of the continuation power flow full-grid load increasing mode, solves the problem of evaluating the voltage stability on the system side or the load side singly, and has good application value and popularization prospect.

A method for using heavy metal mild pollution spirulina to extract phycocyanin, and using its algal residue as principal substrate to adsorb and remove lead, arsenic and cadmium in the water, pertains to the field of environmental biotechnology. The method can be widely used in innocent treatment of mild heavy metal pollution spirulina without accessing market standards in industrial production. The inventive method has main features the method adopts the features of mild heavy metal pollution that it only stick on cell walls, uses a improved purification method to obtain spirulina further processed product phycocyanin that conforms to safety criterion and has higher economic value, wherein, the accompanying diagram is a mass spectrogram of the extracted phycocyanin; and fixs the algal residues, for preparing biological adsorbent for obtaining lead, arsenic, cadmium and other heavy metals.

The invention discloses a smart park energy consumption management system based on artificial intelligence, which relates to the technical field of park management and comprises an energy consumption acquisition module, an energy consumption analysis module and an equipment monitoring module. The energy consumption analysis module is used for acquiring the energy consumption data of the park equipment acquired by the energy consumption acquisition module in real time, performing analysis in combination with the historical energy consumption data of the park equipment in the same period, and judging whether the energy consumption data of the park equipment is abnormal or not; a corresponding detection sensor is arranged in each park device and used for detecting current working state information of the corresponding park device, and the device monitoring module is used for preprocessing the current working state information, comparing the preprocessed working state information with a safety criterion corresponding to the park device and pre-stored in a database and sending the safety criterion to the park device. And the current safety condition of the park equipment is determined and sent to the associated mobile terminal to remind a manager of the mobile terminal, so that the power loss in the smart park is reduced, and the safety risk is avoided.

The invention discloses a method for researching spacecraft trajectory safety criteria based on misjudgment rate. The method specifically includes: (1) establishing the safe set and non-safe set of the trajectory safety problem through the general model of the trajectory safety problem; (2) establishing the misjudgment rate through the concepts of the safe set and the non-safe set; (3) using The false positive rate is used to modify the trajectory safety criterion. This method can effectively solve the probability dilution phenomenon in the trajectory safety problem, and can solve the problem of large deviation at the edge of the probability density function to a certain extent. It provides a set of judgment and improvement methods for the judgment criteria of the trajectory safety problem, making Judgment criteria can more realistically reflect the actual collision situation.

A no-wait ignition device of a gas stove comprises an igniter with a discharging needle, a flame induction needle of which one end can contact flame and generate grounding current after induction flame, and a thermoelectric couple which is connected on the air supply magnetic valve coil in series. The present invention is characterized that the device also comprises a flame induction circuit, an electric source positive pole is connected with a triggering output terminal of the igniter, the electric source negative pole is connected with the other terminal of the flame induction needle, a timing driving circuit, the electric source positive pole and the output terminal of the flame induction circuit are connected, the electric source negative pole ground, the output terminal of the timing driving circuit is connected with the gas supply magnetic valve coil, and the circuit is kept conducting before the thermoelectric couple reaches to absorb the electromotive force of the air supply electromagnetic valve. Compared with the prior art, the ignition device of the present invention comprises a flame induction needle and independent devices of the thermoelectric couple two starting air supply electromagnetic valves. The present invention can realize the object of maintaining electromagnetic valve starting after fast ignition by match of the flame induction circuit and the timing driving circuit, and accord with the national safety criterion for gas combustion range.

A method for reducing the steering torque in a steering system of a vehicle. A method including the steps of monitoring a driver's torque as applied by a driver of the vehicle; providing a plurality of torques that can be imposed on the steering system; and reducing the torques that can be imposed on the steering system by a central reduction factor if monitoring of the steering system reveals a violation of a safety criterion.

The present invention provides one kind of environment detecting warning system and method. First, the detecting unit is used to detect environment to output one environment detecting signal. Then,the safety processing unit coupled to the detecting unit is used to receive the environment detecting signal and produce one environment detecting value, judge whether the environment detecting valueis within some safety criterion and output one danger signal if not. After that, the information terminal unit coupled to the safety processing unit receives the danger signal, produces one warning information and sends out the warning information to the user.

Landing hazard avoidance displays can provide rapidly understood visual indications of where it is safe to land a vehicle and where it is unsafe to land a vehicle. Color coded maps can indicate zones in two dimensions relative to the vehicles position where it is safe to land. The map can be simply green (safe) and red (unsafe) areas with an indication of scale or can be a color coding of another map such as a surface map. The color coding can be determined in real time based on topological measurements and safety criteria to thereby adapt to dynamic, unknown, or partially known environments.

The invention discloses a microgrid reliability evaluation method based on network survivability. According to the method, considering a microgrid safety criterion condition and an operation constraint, a reliability global index of the microgrid is evaluated according to the network survivability obtained via a microgrid network structure; and the capacity of maintaining connectivity of the wholenetwork of the actual microgrid is taken into consideration. In the field of electric power systems, the survivability can be understood to be when a distribution network breaks down or is overhauledby equipment, the communication performance of the network can be kept to the largest extent, so that the capacity of load loss in the fault process is reduced. The fully-communicated network is a network with the most compact structure and also is a network with the strongest survivability. According to the method, the survivability of the network is evaluated, and through the structural difference between the actual network and full-communication network of the corresponding number of nodes, evaluation is carried out by utilizing a network survivability index based on the equivalent shortest path number.

The invention discloses a multi-dimensional aircraft collision conflict risk evaluation system in the field of civil aviation aircraft collision conflict prediction. The system is used for executing the steps of S1, calculating a probability that an aircraft overlaps with other aircrafts in three dimensions; S2, calculating loss interval rates of the aircraft in the three dimensions; S3, solving the probability that the aircraft collides with the other aircrafts in three dimensional directions; S4, comparing the collision probabilities of the aircraft in three dimensional directions to obtaina maximum probability and a dimension corresponding to the maximum probability; and S5, carrying out difference value calculation on the solved maximum probability and a safety standard, and giving safety evaluation according to the difference value. In the invention, multi-dimensional calculation of the collision conflict risk probability of the aircraft is realized. And the maximum value of thecollision conflict risk probability is solved, and a judgment basis for comprehensive safety evaluation of the aircraft is provided based on the maximum value.

The invention discloses an active power distribution network voltage reactive power optimization control strategy comprehensive evaluation method and system. Economy, device performance, voltage quality and safety criteria are comprehensively considered. Firstly, a comprehensive evaluation module of a double-layer reactive voltage coordination control strategy containing a macroscopic criterion layer and a microcosmic index layer is established; secondly, based on a DEMATEL-ANP-anti-entropy weight method and an improved grey relational degree analysis method, a weight calculation method integrating subjective and objective factors is provided; secondly, performing quantitative scoring on each index based on an index scoring quantitative function of a Polynomial difference method; and finally, calculating the score of each index, and obtaining a comprehensive evaluation result of the control strategy in combination with the corresponding weight coefficient. The method provided by the invention is applied to active power distribution network voltage reactive power optimization control strategy evaluation, has very strong comprehensiveness and effectiveness, and can provide powerful decision support for subsequent voltage reactive power control strategy research and investor selection of an optimal investment construction scheme.

The invention discloses a control system, which comprises a first control unit, a second control unit, an isolated power source and a non-isolated power source, wherein the isolated power source is connected with the first control unit which controls a circuit to be isolated; and the non-isolated power source is connected with the second control unit which controls a circuit not to be isolated. Through arranging the two control units, the control system is respectively powered by the isolated power source and the non-isolated power source, thereby saving a plurality of isolating devices and substantially reducing cost; moreover, the control system is safe and reliable, ensures higher safety of electric apparatus operating staff and protects the operating staff from getting an electric shock, thereby better meeting the requirements of safety criteria. The invention can also realize more functions at lower cost such as isolation of a human-machine switching unit, open circuit/short circuit protection for controlled silicon and overload protection.

The invention relates to an association analysis method for the service performance of a high-speed milling cutter. At present, a lot of problems exist in the aspect of evaluation on the data integrity and definition of the service behavior of the high-speed milling cutter, so the development and application of high-speed milling cutter products are limited. The method comprises the following steps of: A, establishing the safety criterion of the high-speed milling cutter, and establishing the safe and stable analysis of the diameter, tooth number, cutter tooth distribution and interactive action thereof of the milling cutter on high-speed milling by a test to obtain an influence law curve, wherein the strength failure rotate speed of the milling cutter is reduced with the increase of the diameter and the tooth number, and first-order modal inherent frequency has large difference under the interactive action of the diameter and the tooth number, and is a main parameter for influencing the safe and stable cutting performance of the milling cutter; B, establishing a high-speed milling cutter service behavior characteristic model which meets the requirements of machining efficiency and the quality of a machining surface; and C, analyzing and evaluating the service performance of the high-speed milling cutter quantitatively by the gray comprehensive association analysis of the service performance of the high-speed milling cutter. The method is used for analyzing the service performance of the high-speed milling cutter.