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Dedicated Short Range Communications (DSRC), a promising vehicle-to-vehicle communication technology, has been under active research and large scale DSRC deployment is expected to start shortly. However, before all vehicles are deployed with DSRC, there will be a relatively long partial DSRC deployment period where DSRC-equipped vehicles and non-DSRC-equipped vehicles both exist on roads. More importantly,...
Aiming at the problem of fault diagnosis and safety region boundary estimation of rolling bearing in metro vehicle, A method combined empirical mode decomposition (EMD) with support vector machine (SVM) was proposed. Firstly, The intrinsic mode functions (IMF) containing fault information was obtained by EMD decomposition based on the collected vibration data. Then, RMS value, energy, Shannon entropy...
With the rapid development of the high-speed railway, the safety and reliability problem of the railway bring more rigid requirement to the high-speed railway industry. This paper focuses on the diagnosis problem of railway turnout system, which is the most important infrastructure elements of the rail system. According to the characteristics of the turnout mechanism and in order to improve the diagnosis...
The Safety Computing System is a kind of system which asks for high safety and reliability. In order to rigorously analyze the safety and reliability of the M out of N system, abstracting running states of the system, and constructing a state transition model based on Markov Process. At the same time, the safety and reliability of the M out of N system are calculated on the basis of Markov Model....
Non-Volatile Memory (NVM) has many advantages, such as non-volatility, high density, shock-resistivity, and low leakage power, and disadvantages, such as the relatively high write energy and limited write endurance. It also has the feature of writing more slowly than reading. We design a read-modify-write strategy called MinFS for NVM-based main memory to reduce the number of update bits and prolong...
There is an urgent need for a novel vaccine that is effective against human Enterovirus 71 (EV71) outbreaks. A double-blind, randomized controlled study was to evaluate the safety and immunogenicity of a human EV71 vaccine in healthy adults, children and infants. The vaccine dosages were 200U and 400U for children and adults, and 100U, 200U and 400U for infants. Subjects were randomized to receive...
There're more than 200 representative buildings built in the period of Republic of China in Nanjing, which are the important material and cultural witness to the former history. But such buildings were built and designed in the so early time from 1912 to 1949 that there're no seismic design and earthquake-resistant constructional measures in them. Today, under the more frequent earthquake, the above...
Aiming to solve the inefficiency problem of the time advance when HLA-based distributed simulation is applied to large-scale hardware-in-the-loop real-time simulation, we propose a conservative time management model with optimized parallelism (OPCTMM) to boost the overall running efficiency. In order to implement the OPCTMM, a weakest conservative time management model (WCTMM) with minimum constraints...
A new driver model for the Chinese Train Control System Level 3 (CTCS-3) simulation system is proposed in this paper to achieve safe, punctual and smooth control of train under complex situations. Particularly, a rule library for the driver actions is established to deal with the complex environments, and a two-step speed control strategy is adopted to meet the requirements of safety. By using the...
Bus protection is important to the steadly operation of grid, according to countermeasure requirement of relay protection, the bus differential protections upwards 220 kV degree must be duplicated, but the work of bus protection duplex configuration reconstruction relate to wide ranged, complex technique and excessive danger points. This paper analyzes the attentive safety, technology, experimentation,...
The paper presents the ongoing work of studying FMEA method for embedded safely critical software via formal analysis of various dependence relations among software elements, which can fairly improve the automation and precision of both system level and detailed level FMEA. These dependence relations are depicted by the formal models abstracted from software design and implementation, and the FMEA...
Immunization is considered as the most effective way for the prophylaxis of hepatitis A virus (HAV) infection. This study aimed to evaluate the immunogenicity and safety of three consecutive lots of a new preservative-free inactivated hepatitis A vaccine (Healive ® ) in healthy children. A double-blind, randomized and controlled clinical trial was conducted in healthy volunteers aged from...
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