Self-Powered Neutron Detectors (SPNDs), which are widely used in nuclear reactors to obtain core neutron flux distribution, are accurate at steady state but responds slowly to changes in neutron flux. Dynamic compensa...
详细信息
We are studying the method of developing a platform that delivers large-volume contents efficiently in a many-to-one transmission style, by combining network virtualization technology and the handling of LDGM error co...
详细信息
We are studying the method of developing a platform that delivers large-volume contents efficiently in a many-to-one transmission style, by combining network virtualization technology and the handling of LDGM error correction code. This paper describes its key technologies such as packet routing by using multiple virtual networks, data transmission using redundancy coding, and evaluation of communication qualities, and shows their current outcomes.
Tribological properties of impregnated graphite are greatly influenced by preparation technology and working conditions and it’s highly susceptible to corrosion environmental impacts,but the experimental research abo...
详细信息
Tribological properties of impregnated graphite are greatly influenced by preparation technology and working conditions and it’s highly susceptible to corrosion environmental impacts,but the experimental research about it are *** this paper,three kinds of impregnated graphite samples are prepared with different degree of graphitization,the tribological properties of these samples in the dry friction environment and in a corrosive environment are analyzed and *** tribo-test results show that the friction coefficient of samples is reduced and the amount of wear of samples increase when the graphitization degree of samples increases in dry friction *** in a corrosive environment（samples are soaked N2O4）,the friction coefficient and amount of wear are changed little if the graphitization degree of samples are *** the degree of graphitization increase,the friction coefficient and amount of wear of samples increase too,the amount of wear is 2 to 3 times as the samples tested in the non-corrosive environment under pv value of 30MPa？m/*** impregnated graphite,which friction coefficient is stable and graphitization degree is in mid level,such#2,is more appropriate to have a work in the corrosion *** this paper,preparation and tribological properties especially in corrosive environment of the impregnated graphite is studied,the research conclusion can provide an experimental and theoretical basis for the selection and process improvement of graphite materials,and also provide some important design parameters for contact seal works in a corrosive environment.
Flexible graphite packing rings with different density have different compression performance. According to numerical and experimental methods, this paper studied the compression and resilience performance, stress tra...
详细信息
Flexible graphite packing rings with different density have different compression performance. According to numerical and experimental methods, this paper studied the compression and resilience performance, stress transfer characteristics and lateral pressure coefficients with different density from 1.30 g / cm 3 to 1.60 g / cm 3 under the assembly condition for the single graphite packing rings, thus compression characteristics of flexible graphite packing rings with different density can be obtained.
In China,the development and application goals of Small Modular reactor(SMR) aim at electricity generation area,heat supply area,and seawater desalination area,*** main technical features of the SMR areas follows:inte...
详细信息
In China,the development and application goals of Small Modular reactor(SMR) aim at electricity generation area,heat supply area,and seawater desalination area,*** main technical features of the SMR areas follows:integrated pressurized water reactor,reactor coolant pump and reactor pressure vessel connected by short pipe,steam generator sets in reactor pressure vessel,control rod drive mechanism(CRDM),pressure vessel,reactor internals,Once-Through Steam Generator(OTSG),and canned motor pump are all mature *** on the characteristic of the reactor and OTSG,the automatic control design of the SMR is discussed in this paper,and the simulation results are presented to illustrate the control scheme.
A model for one-dimensional non-linear consolidation of a soft foundation with an upper crust with depth-dependent additional stress was presented in this paper. The semi-analytical solution of this model with the bou...
详细信息
Being a new-generation C4ISR system simulation method,the construction approach of net-centric simulation(NCS)is developing toward net-centric from the traditional approach of *** is mainly completed by the constructi...
详细信息
Being a new-generation C4ISR system simulation method,the construction approach of net-centric simulation(NCS)is developing toward net-centric from the traditional approach of *** is mainly completed by the construction of the simulation task community(STC),the key to which being the dynamic integration of the various services spread in the network in order to form a new STC that meets the requirements of different *** this study,a simulation task community service selection algorithm(STCSSA)is *** main idea of this algorithm is to transform the construction of STC to the searching of optimal multi-objectives services with QoS global *** paper first introduces the QoS model of STC and evaluates the service composition process,then presents the detailed operating process of STCSSA and design of the dynamic inertia weight strategy of the algorithm,and also proposes an optional variation *** tests were performed on STCSSA with other particle swarm optimization *** was validated from the perspective of performance that the proposed algorithm has advantages in improving the rate of convergence and avoiding local optimum,and from the perspective of practical application STCSSA also demonstrated feasibility in the construction of large-scale NCS task community.
In order to change the poor adaptability and low efficiency of the message router in enterprise service bus, this paper proposed a natural language processing based semantic-level message routing algorithm and design ...
详细信息
Vibration characteristics analysis is important in the design of multi-span pipeline with different support conditions. In order to analyze the natural frequency and the vibration modal of the multi-span pipeline, a m...
详细信息
Vibration characteristics analysis is important in the design of multi-span pipeline with different support conditions. In order to analyze the natural frequency and the vibration modal of the multi-span pipeline, a matrix transfer method is proposed in this paper. With the multi-span pipeline divided into single-span pipes, the transmission formulas for the deflection, angle, bending and shear between two adjacent spans are deduced, in combination with the Krylov function solution of the free vibration equation for the single-span pipe, and the constraint condition between the two adjacent spans of the multi-span pipeline. According to the boundary conditions on the starting and ending spans, the natural frequency equation and the vibration modal function between two adjacent spans of the multi-span pipeline are presented. The FORTRAN program based on the above principle is written, and the natural vibration frequencies and the vibration modals of two typical multi-span pipelines are investigated and compared with the results from ABAQUS. It is shown that the model presented in this paper is efficient in the analysis of multi-span pipeline and has the advantages of high computational efficiency and convenience for engineering practice application.
.jpg?site=8fa65c6403e3f8b5b3923814eda18bd0){kind=spacer}
暂无评论