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Navy equipment software is safety critical software. Software safety is an important factor for naval equipment achieving combat mission successfully. According to characteristics of navy equipment system and its software, this paper has proposed a software safety engineering method basing on system theory. Further, it has described safety tasks in each stage included in software lifecycle. Finally,...
Nowadays, noise pollution has become an outstanding problem in modern life since it affects people's health physically and psychologically. However, the means for people to understand the noise level around them are very limited. They can only get to know their environment noise through facilities such as noise measuring station or noise display board in most cases. And the traditional ways to monitor...
This paper uses MaSE to build the application model of city traffic monitoring system based on MAS, establishes the model of static and dynamic Agent model which were combined with the characteristics of the monitoring system by using UML. This model maps the entity state change into the model for analysis and simulation using autoregressive Markov probability model, has improved the efficiency of...
Synthetic Decision Support System is combined with online analytical processing, data mining, model libraries, databases and knowledge bases. It will become one of the key technologies of data management services of Internet of Things, and it will establish the foundation for the smart city. This paper researches on the sequential pattern mining for decision support, implements the Prefix Span algorithm,...
Wireless sensor networks (WSNs) are gaining popularity in practical monitoring and surveillance applications. Because of the limited energy of sensor nodes, many WSNs work in a low duty cycle mode to effectively extend their network lifetime. However, low duty cycling also decreases transmission efficiency and makes data gathering more challenging. By exploiting the redundancy of in real sensing data,...
The groundwater sampling and nitrate nitrogen testing were carried out for 13 times from 2005 to 2011 in order to investigate the nitrate nitrogen dynamic change of groundwater in the intensive agricultural area of Daxing district and explore its control countermeasures. The results indicated that the mean value of nitrate nitrogen in groundwater of this area was 1.58 mg/L, which met the criterion...
Urban River is an important component of urban ecosystem. But urban rivers were polluted in different degrees. Lower energy consuming and in-situ treatment is a reliable and effective technology for water purification. The degradation effect was measured under different conditions such as HRT, reason and so on.
The pickled Chinese cabbage is one of the traditional fermented vegetables in China. In this article, the spontaneous and Lactic acid bacteria(LAB) inoculated fermentation methods were compared. The nitrite peak came forth at the middle stage of natural fermentation, but did not appear at the LAB starter fermentation. The pickled Chinese cabbage with natural and inoculated processing was safe, as...
This paper studies the control system requirement and key technique for the Micro-grid with REN&DER and CCHP, introduces the framework of CSPA-2000(FDCS) distributed automation system, including distributed control structure with distributed power and load, multiple DPU cooperative control, remote monitoring to multiple REN&DER systems, and introduces CCHP and joint control ways of multiple...
Methods of tribo-system health state recognition and wear residual lifetime prediction are proposed based on wear failure mechanism, many uncertain influence factors also being taken into consideration. It mainly deals such engineering problems as tribological behavior measurement friction pair surface testing, experiment data collection and' management, feature extraction and health state recognition,...
Fault injection technology devotes an efficient way for verifying fault tolerance of computer and detecting the vulnerability of software system. In this paper, we present a Xen-based fault injection technology for software vulnerability test (XFISV) in order to build an efficient and general-purpose software test model, which injects faults into interactive layer between software applications and...
Applying image processing technologies to pedestrian detection has been a hot research topic in intelligent transportation systems (ITS). However, the existing video-based algorithms to extract background image may suffer their inefficiency in detecting slow or static pedestrians. To fill the gap, an improved Gaussian mixture model (GMM) for pedestrian detection is proposed in this paper. Three novel...
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