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DC withstand voltage test is essential for examining the insulation condition of converter transformers. But it's hard to identify the partial discharge under DC voltage since there's no phase information as under AC voltage. The acceptance criteria of the routine test is that discharge number which exceeds 2000pC is less than 30 during last 30 minutes and 10 during last 10 minutes according to standard...
Environmental control and life support system(ECLSS) of the manned spacecraft is an important system to guarantee the safety and life support of the astronauts and the environment inside the space station. For the physicochemical regeneration type of ECLSS(PRLSS), because of its complicated physicochemical process, to analyze and evaluate the mass balance and operation performance through simulation...
This paper designs a fiber optic liquid-level sensor is used to measure the level of oil tank, introduces design, development process of the sensor and use this sensor to do experiment to verify the correctness of theory of the sensor. This sensor consists of two section of the same fiber optical and elastic diaphragm. The sensor's development uses the principle of coupling loss between optical fibers,...
Multi-label learning task is using to solve problems of syndrome diagnosis for patients may simultaneously have more than one syndrome in traditional Chinese medicine (TCM). The two goals of multi-label learning are label prediction loss and relevance ordering loss. Most Multi-label learning algorithms focus on only one of the goals and neglect the other one. However, there is a multi-label learning...
This paper proposes an evolutionary model for the construction of complex networks. The model uses evolutionary set theory to simulate the process of how a real network generates. Evolutionary set theory is a model of spatial game. Individuals exist as nodes in the network and connections between nodes imply the relationship of individuals. If there is a connection existed between two individuals,...
This study will analyze the refined safety management of Chinese coal enterprise by means of the high-level interviews, case analysis and investigation. And it will also use real evidence and case studies to verify the effectiveness of contents and systems of the enterprises' refined safety management. This work will help the enterprises shake off backwardness and low efficiency of safety management...
With an aim to master the development regulations of modern naval warfare, the author divides the complexity of modern naval warfare into the structure complexity and the behavior complexity for further measuring through analyzing the concept of naval warfare complexity. Firstly, the “distribution entropy of node strength” is brought forward to measure the complexity of static structure of naval warfare...
The paper reviewed hydrogen production biotechnology on reactor development and design aspects. Biological hydrogen-producing reactor as acid-producing phase of two-phase anaerobic organism treatment system plays an important role in the following aspects: Reactor was developed as the follow ideas: a. CSTR-type anaerobic fermentation reactor is selected to reduce the substrate concentration in reactor...
Multiplication is performed frequently when implementing finite impulse response (FIR) filters. In most cases, rounded products are necessary to circumvent the growth of word length in order to reduce the area requirement and power dissipation and to speed up the circuit. However, due to rounding or truncating, errors are caused. In addition, in the FIR filter implementation, because of internal truncation,...
Order to meet the needs of construction of high-speed railway passenger dedicated line, 900t rubber-tyred girder hoister is researched and manufactured. Steering system of the hoister is controlled by electro-hydraulic proportional displacement control system, and segment-PID control strategy with dead zoon is used. However with the passage of time, steering performance of girder hoister begin to...
With the development of modern microelectronics technology, particularly computer science and integrated circuits technology, multi-mode composite homing guidance has become a highly developing area of research and academic direction. This article presents a composite system contained readout integrated circuit of IR/UV detectors based on current mirroring integration and differential mode, design...
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