43 results about "Reliability (characteristic)" patented technology

Pushing data to mobile devices can be problematic because mobile platforms may support a number push services, each of which have different cost and reliability characteristics. The problem of being able to push data to multiple different types of mobile devices from a single server is solved by a push service aggregator supporting multiple push services. Upon receiving a push request, one or more push services are selected for pushing data to a client. The selection may be based on a delivery profile included with the push request, information about the client, past performance of the push services, current status of the push services, or combinations of these. The status of the push may be tracked and monitored so as to retry in the case of non-delivery.

A miniaturized laser package is provided comprising a standard semiconductor laser package modified to accept a solid state microchip assembly pumped by the diode laser. Standard packages described in the invention include TO and HHL packages all of which are characterized by small dimensions, well sealed housing, robust mounting features, known characterized materials and economical production and assembly techniques characteristic of the semiconductor processing industry. In particular, the microchip lasers are produced using high density techniques that lend themselves to mass production, resulting in very low unit costs. At the same time, the compact laser devices provide a solution to the problem of providing laser radiation at high beam quality and good reliability features with a variety of wavelengths and operational characteristics and low noise features not available from diode lasers yet relying primarily on standardized designs, materials and techniques common to diode laser manufacturing. The devices constructed according to methods taught by the invention can therefore be readily integrated into numerous applications where power, reliability and performance are at a premium but low cost is essential, eventually replacing diode lasers in many existing systems but also enabling many new commercial, biomedical, scientific and military systems.

The present invention provides a fault prediction and condition-based repair method of an urban rail train bogie. An optimum service life distribution model of a framework, a spring device, a connecting device, a wheel set and axle box, a driving mechanism, and a basic brake device of a bogie is determined by adopting a method based on survival analysis; a reliability characteristic function of each subsystem is obtained; then, a failure rate of each subsystem of the bogie is calculated by adopting a neural network model optimized by an evolutionary algorithm; and finally, proportional risk modelling is conducted by taking the failure rate and safe operation days of each subsystem of the bogie as concomitant variables; and on the basis of cost optimization, thresholds and control limits for condition-based repair of a bogie system are obtained.

The present invention provides the ability to use an existing store-and-forward messaging network such as an electronic mail system to replicate data between computer sites. The replication provided by the present invention can be used with software applications, such as workgroup applications, to replicate data located on multiple sites. Workgroup replication data is sent to other sites via electronic mail (“e-mail”) messages. The present invention provides reliability features to handle errors in electronic mail transmissions. For example, the present invention provides the ability to reassemble objects at a replication site such that an object and all of its dependencies exist prior to the object's use at the site. Messages referred to as “ACK” messages are used to communicate a site's state and to provide other control information. Each site maintains latency information to determine transmission failures.

The present invention discloses a product multidimensional correlation-oriented degradation failure modeling method. The method specifically comprises: determining reliability characteristic quantities of a product; collecting and processing degradation data of each characteristic quantity; establishing a degradation model of each characteristic quantity; estimating a parameter in the degradation model of each characteristic quantity; establishing a multidimensional correlation degradation model by using D-Vine Copula; and determining types and parameter values of all bivariate Copula functions. According to the method provided by the present invention, a multidimensional correlation variable joint density function and an edge density function thereof are connected by a plurality of bivariate Copula functions by using D-Vine Copula, so as to effectively process a multidimensional degradation process with complex correlation, and achieve better flexibility and generalization ability.

An overheating fault simulating method for GIS (gas insulated switchgear) bus joint includes steps of building a mathematical temperature-rising model according to a physical heating process of the GIS bus joint; performing similarity analysis according to the mathematical temperature-rising model, determining an accurate coupling field similarity relation; simplifying the mathematical temperature-rising model, determining an approximate coupling field similarity relation; determining a simulation test scheme of overheating faults of the GIS bus joint and a physical GIS bus joint similarity model under various contact conditions; implementing an overheating fault simulation test on the basis of the physical similarity model of the GIS bus joint according to the simulation test scheme, and acquiring simulation test data. By simulating the overheating faults of the GIS bus joint with the similarity model of the GIS bus joint, overheating fault mechanisms and reliability features are indirectly researched, the defects that protomodel simulation test is high in cost, equipment manufacturing period is long and reliability during test is poor are overcome, and implementing of temperature monitoring and routing inspection of the GIS bus joint are facilitated.

The invention relates to an aircraft task reliability modeling method based on dynamic characteristics. The method includes the steps of firstly, conducting aircraft system analysis and task analysis, and establishing an aircraft task result state set; secondly, selecting an event tree (ET) method, and establishing an aircraft task process reliability reference model; thirdly, analyzing aircraft initial/middle task reliability characteristics, selecting a dynamic failure tree (DFT) method, a Bayesian network (BN) method, a Markov method and the like, and establishing an initial/middle task reliability characteristic model; fourthly, establishing an aircraft task reliability comprehensive model by compositing the initial/middle task reliability model. By means of the method, the dynamic characteristics in the aircraft complicated task process can be more accurately depicted, the influences of dynamic changes of aircraft system composition at different task stages in the aircraft task process on the aircraft task reliability are comprehensively reflected, and the established task reliability model can be more accurate.

The invention provides a testing method for verifying the reliability of an electricity utilization information collecting device. The testing method includes the following steps: building an electricity utilization information collecting device reliability model, determining a failure mode, a failure criteria and a failure statistic principle, carrying out a temperature-humidity-constant stress accelerated life test on the electricity utilization information collecting device, carrying out failure statistic, analyzing test data obtained through the accelerated life test, and obtaining the accumulated failure probability and the reliability. According to the testing method for verifying the reliability of the electricity utilization information collecting device, the temperature-humidity-constant stress accelerated life test on the electricity utilization information collecting device is guided to be carried out by building the electricity utilization information collecting device reliability model, and estimated values of reliability characteristic variables under the normal use condition are derived through failure data under the accelerated condition to verify whether the reliability of the electricity utilization information collecting device meets requirements or not.

The invention discloses a reliability life evaluation method of a long-life electronic device under multiple stresses based on a depth belief network, which estimates reliability characteristics by obtaining device failure data under different environmental stresses through an accelerated life test, and then establishes a reliability derivation model to complete the reliability life derivation under a constant stress level. The evaluation method comprises the following steps: firstly, determining the environmental stress which affects the working reliability of the electronic components; secondly, designing the accelerated life test; thirdly, performing statistical analysis in the test data to obtain the reliability life estimated values of components under different stress levels; and finally, determining the reliability derivation model by using the accelerated life test data. The invention solves the problems of sample shortage and limited test time, adopts a novel constant stress reliability characteristic derivation model, solves the problem that the traditional single stress estimation method is prone to model nesting risk, and realizes the establishment of the life derivation model under multiple stress levels.

The invention relates to a feature-based space multi-phase mission system reliability modeling method. The method comprises the steps of (1) analyzing a mission profile of a space multi-phase mission system, determining a system reliability feature, and defining a phase mission state and a system mission state; (2) proposing a space multi-phase mission system reliability modeling method, building a system mission reliability model by adopting a multi-state event tree (MSET) method, and building a phase mission reliability model by adopting a Markov chain (MC) method; (3) calculating a state occupation probability (SOP) matrix in a terminal stage of phase mission, and determining a phase mission state probability; (4) building a phase state transfer model, and determining a phase transfer probability; and (5) calculating a system mission state probability. According to the method, the mission reliability feature of the space multi-phase mission system can be accurately described, so that the built mission reliability model is more accurate.

The invention discloses a method for quickly analyzing universal reliability indicators of a printed circuit board. The method includes steps of setting up a reliability characteristic parameter distribution model of electronic components; acquiring an electronic component list by calling an interface function; compiling a detailed electronic component list of the printed circuit board; acquiring a table list containing universal failure parameters of all the electronic components according to the reliability characteristic parameter distribution model of the electronic components of the printed circuit board; calculating failure rate of the printed circuit board in the using environment; calculating system reliability, system unreliability and system average faultless service life of the printed circuit board according to the failure rate of the printed circuit board in the using environment. The design of the circuit board is of great guidance significance, continuity between the design of the circuit board and reliability analysis is realized, cross implementation of the design of the circuit board and the reliability analysis can be conveniently realized by users, and design efficiency of the circuit board is improved.

The invention discloses a reliability evaluation test method of a built-in load switch for an electric energy meter. The reliability evaluation test method is characterized by including a load switch mechanical reliability and electrical reliability evaluation method. According to the method, a failure rate is adopted as a reliability characteristic parameter, and grading testing is carried out through adopting a fixed event censoring mode. The method includes the following steps that: S01, an allowable failure number Ac and a censoring failure number rc are selected, wherein rc and Ac satisfies a relational expression that rc=Ac+1; S02, the number Tc of times of censoring is obtained according to the allowable failure number Ac and a pre-selected failure rate grade; S03, the number tz of times of test censoring of test pieces is selected; S04, the number n of the test pieces is determined according to Tc, Ac and tz; S05, n test pieces are randomly sampled from products in batch production; S06, test and inspection are carried out according to regulations; S07, a failure number r and the number of times of the test of failed products are calculated; and S08, a test result is judged. The test method of the invention has the advantages of simple operation, accurate detection and the like.

The invention relates to a No.7 signaling network-based communication control system and method and the service controller structure thereof. And the system comprises several service controllers and service management servers connected to the No.7 signaling network, and the service controller applies processor technique and dispersive data list technique to communication network, and skillfully uses message transfer ability and inherent high-reliability characteristics of the No.7 signaling network to provide two signaling link access modes to implement inquiring and executing service logics of memory service data list: traditional signaling point-possessing signaling terminal mode and no-signaling point signaling conversion mode, implementing high efficiency handling and transfer of signaling information. And the invention breaks through the limit of traditional switching and intelligent network techniques, both able to be independent of the active communication network and implement in scale the services, such as user service authentication, detailed bill accounting, number upgrading and number carrying, and possessing all interfaces and characteristics of NGN data sublist and HLR.

The invention discloses a method for determining the demand quantity of spare parts of a multi-Weibull unit part for overall part replacement and maintenance of a large cargo ship, belongs to a mechanical equipment supportability design method, and solves the problem that the demand quantity of the spare parts is difficult and inaccurate to calculate in the supportability design process of the mechanical equipment. The method comprises the steps of Gamma equivalent part establishment, initial value setting, guarantee probability calculation and judgment. According to the reliability characteristic of the Weibull unit, the number of the spare parts can be quickly calculated on the basis of the real reliability structure of the multi-unit k/N voting component, and the problem that the calculation of the demand quantity of the spare parts in the existing mechanical equipment supportability design is inaccurate is solved. In the supportability design stage and the train installation operation stage of the mechanical equipment, the demand quantity of spare parts can be accurately determined, the related cost of the mechanical equipment in the whole life cycle can be accurately estimated, and technical support is provided for evaluating the cost-to-efficiency ratio state of the mechanical equipment, achieving good guarantee of the mechanical equipment and guaranteeing the mechanicalequipment.

The invention provides an intelligent substation secondary system reliability assessment method based on a coefficient of variation method. The method includes: performing statistics on the number of key elements in an intelligent substation, and calculating the comprehensive failure rate of each element in various network structures; establishing a reliability evaluation matrix; converting the reliability evaluation matrix to a standard reliability matrix; obtaining the weight value of the comprehensive failure rate of each element according to a coefficient of variation to further obtain a weighted reliability matrix; and establishing a reliability characteristic space to obtain the relative proximity of each sample point to the optimal point and the worst point, ranking the relative proximity of each sample, and obtaining a reliability assessment result of a secondary system network structure represented by each sample point. According to the method, comprehensive evaluation is performed by employing the coefficient of variation method, factors which influence the reliability of the intelligent substation secondary system can be rapidly found out, and the reliability level of a substation communication system in the design and planning process is improved.

The invention relates to a system based on the signaling processing art for realizing the telecom value-added service. The system comprises a plurality of service control devices accessed in a No 7 signaling network and a service management server. The service control device organically applies the processor art and the decentralized data table art to a communication network, and ingeniously utilizes the message-passing ability and the internal high-reliability characteristics of the No 7 signaling network, and provides two signaling link access modes to realize the query about a memory service data sheet and the execution service logic, wherein, the access modes are a signaling terminal mode with signaling points and a signaling transfer mode without signaling points, so that the high-effective processing and transferring of the signaling information are realized. The invention breaks the confines of the traditional exchange and the intelligent network art, implements the services, such as the user service authentication, the number portability, the signaling monitoring, and the like, in a large scale, effectively solves the contradictions between investment and benefit, and technology and development, and is dependent of the prior communication network.

This invention relates to a method for securing reliable transmission of Web messages including a peer-to-peer double-way transmission mode, permanent storage, information confirmation and a selection re-sending system, a reliable character definition and hierarchical strategy and a support multi-message confirmation mode to secure reliable transmission of Web service messages, in which, the peer-to-peer double-way transmission mode means that the two parties transmitting messages are both the transmitter and the receiver and messages are transmitted in the peer-to-peer two parties simultaneously, the permanent strategy refers to setting a buffer region for sending information and one for receiving information for every node to store and receive information so as to transmit information after resuming system and network fault and before new fault happens, the confirmation, selection and re-sending system, the reliability character definition and the support multi-message confirmation mode are used to secure reliable transmission of messages by defining reliable character, confirmation of the ID and re-sending information.

The present invention relates to a semiconductor discrete device storage life characteristic detection method and system. The method includes the following steps that: test samples are obtained; failure detection and classification are performed on the test samples, so that a qualified sample set and a failure sample set can be obtained; storage reliability feature detection analysis is performed on the qualified sample set, so that a first analysis result can be obtained; failure analysis is performed on the failure sample set, so that a second analysis result is obtained; and the storage life states of the test samples can be obtained according to the first analysis result and the second analysis result. According to the semiconductor discrete device storage life characteristic detection method and system of the invention, the storage reliability feature detection analysis is performed on the qualified sample set, so that whether test samples having storage degradation failure characteristics exist in the qualified sample set can be judged; the failure analysis is performed on the failure sample set, so that whether test samples having storage failure information exist in the failure sample set can be judged; and the storage life states of the test samples can be obtained according to the analysis results. With the above scientific storage life evaluation method adopted, the storage life states of the test samples can be evaluated accurately and accurately.

The invention provides a reliability technology teaching experiment system. The reliability technology teaching experiment system comprises an upper control microcomputer, a high and low temperature cycling test chamber, a bus type experiment frame, a temperature control instrument, an electrical stress loading/measuring system and a programmable power supply. Discrete electronic components are used as an experimental subject and inserted in a corresponding experiment board, and the experiment board is inserted in the bus type experiment frame inside the high and low temperature cycling test chamber. System control software which is developed in a customized mode is installed in the upper control microcomputer, and can conduct integrated control over stress loading and on-line testing. Temperature changes of the high and low temperature cycling test chamber are changed through the temperature control instrument. Electrical stress borne by the experiment board is controlled through the electrical stress loading/measuring system and the programmable power supply. Measurement data of reliability characteristic quantities of all the experiment components on the experiment board are collected on line and in real time through the electrical stress loading/measuring system. The upper control microcomputer, the high and low temperature cycling test chamber, the bus type experiment frame, the temperature control instrument, the electrical stress loading/measuring system and the programmable power supply are distributed in an integrated cabinet in an integrated mode, and the experiment board is selected for use as needed in an experiment.

Compositions suitable for topical use to treat ectoparasite infestations are described. The compositions are suitable for use on the hair of humans or animals, without the need for pharmaceuticals or medicaments. The compositions are essentially nonaqueous and non-Newtonian, such that the compositions can be controllably delivered either manually or through use of a dispensing means. One such exemplary dispenser/applicator is described. Although the compositions are otherwise substantially free of water, they exhibit good risibility characteristics and pseudoplastic rheology. Methods for the use of the nonaqueous compositions and kits containing the compositions are also presented.

The invention discloses a robust optimization design method of a contact net support suspension system wrist-arm based on a disturbance interference theory. The robust optimization design method of the contact net support suspension system wrist-arm based on the disturbance interference theory comprises the following steps: establishing a stress expression for an X type wrist-arm; considering design parameters as random variables, and obtaining a reliability characteristic equation based on the probability interference theory; performing micro-disturbance on the random variables and the reliability characteristic equation; calculating a robust reliability indicator; converting a probability distribution function that randomly distributes the random parameters into a standard normal distribution function; calculating the robust reliability of the wrist-arm; and establishing a mathematical model for the robust optimization of the wrist-arm. In the robust optimization design method of thecontact net support suspension system wrist-arm based on the disturbance interference theory, the non-deterministic probability theory, micro-disturbance and Edgeworth theory are introduced into thestructural design of the wrist-arm, and the wrist-arm reliability is directly embedded into the optimization model; therefore, the key technology of the robust design of electrified railway contact net is solved.

The present invention includes a method and system configured to establish a reliability characteristic associated with a part type. The method includes the step of establishing a use associated with a part, the part being of the part type, establishing an amount of usage associated with the part, establishing a service characteristic associated with said part, and establishing the reliability characteristic associated with the part type in response to said part use the part usage, and the part service characteristic.