Propagation Properties of Electromagnetic Wave in a Plasma Slab

In this paper, the calculated results about the propagation properties of electromag-netic wave in a plasma slab are described. The relationship of the propagation properties with frequencies of electromagnetic wave, and parameters of plasma (electron temperature, electron density, dimensionless collision frequency and the size of the plasma slab) is analyzed.     

Expansion of Plasma of Electrically Exploding Single Copper Wire Under 4.5kA～9.5kA/Wire

Abstract The experimental system for electrically exploding single metal wire has been de-signed and manufactured. Expansion of the dense plasma column formed from an electricallyexploding Cu wire of diameter 30 μm has been studied with a high-speed photographer to obtainthe time-dependent radius (R-t) curve. The experimental results demonstrate that the mean ex-pansion rate of the dense plasma column is 1.94 μm/ns, 2.6 μm/ns and 3.75 μm/ns according tothe peak pulse current 4.5 kA, 7 kA and 9.5 kA respectively. The results can be beneficial to givinga profound understanding of the early stage of wire-array Z-pinch physics and to improvement ontheir design.     

Flow Simulation and Optimization of Plasma Reactors for Coal Gasification

This paper reports a 3-d numerical simulation system to analyze the complicated flow in plasma reactors for coal gasification, which involve complex chemical reaction, two-phase flow and plasma effect. On the basis of analytic results, the distribution of the density, tempera-ture and components‘ concentration are obtained and a different plasma reactor configuration is proposed to optimize the flow parameters. The numerical simulation results show an improved conversion ratio of the coal gasification. Different kinds of chemical reaction models are used to simulate the complex flow inside the reactor. It can be concluded that the numerical simulation system can be very useful for the design and optimization of the plasma reactor.     

Neutronic Comparison of Tritium－Breeding Performance of Candidate Tritium－Breeding Materials

Tritium self-sustainment, which will meet the fuel requirement of fusion reactor, is one of the key issues of fusion power development. The tritium breeding performances of various tritium-breeding materials are compared based on a series of neutronics calculations using three-dimensional Monte Carlo neutron-photon transport code MCNP/4C with the IAEA FENDL-2 data library. The effects of the dimensions of the tritium-breeding zone and the enrichment of 6Li on Tritium Breeding Ratio (TBR) are analyzed. The effects of Be as a neutron multiplier on TBR are also calculated.     

HL-2A Tokamak Edge Modeling with B2

The outer divertor plasma of HL-2A and its associated scrape-off plasma have been simulated using a two-dimensional multi-species fluid code of Braams with a simplified neutral gas model. HL-2A has a double-null closed divertor in separate divertor chambers above and below the nearly circular plasma tours. The computed numerical grid is developed according to an ideal magnetic surface. The calculation is involved only with pure hydrogen plasma. The emphasis has been focused on parametric studies involving variation of the assumptions made for the core plasma. The peak temperatures and the heat flux near the target are of the principal concern。     

集控值班员如何正确处理电气设备故障

针对变电站实现无人值守后，如何远距离正确处理电气设备事故进行了分析，有利于提高集控值班员综合分析判断事故的能力。     

受限语言子集的理论研究和探索

本文在综述受限语言研究成果的基础上,提出受限语言子集的一种形式化描述模型,并给出其相应的语言特性和数学特性,就受限汉语子集的确定方法问题进行了理论研究和探索。作者希望本文提出的表示模型和确定方法能够引起有关的讨论,并在充分认识受限语言研究的必要性和困难的基础上,将其引向全面深入的发展。     

汉语三字词声调的模式分析

汉语三字词的声调模式是复杂的。本文对4 男4 女各192 个三字词的声调进行分析,选择各音节的头尾差和相对调位比为特征,在进行特征抽取、统计和分析的基础上,研究了三字调整声调的模式和变调规则。本文的结果对三字词和连续语音声调的识别具有重要价值。     

三唑并嘧啶磺酰胺类除草剂的QSAR研究（II）

三唑并嘧啶类除草剂是作用于乙酰乳酸合成酶的新一类超高效除草剂，本文采用ＣＡＳＡＣ软件中的逐步线性回归方法，在二维水平上通过讨论三唑并嘧啶类化合物对油菜ｒａｐｅ（Ｇｏｓｓｙｐｉｕｍｓｐｐ．）欧龙牙草ｃｏｃｋｌｅｂｕｒ（Ｘａｎｔｈｉｕｍ，ｓｐｐ．）曼陀罗ｊｉｍｓｏｎｗｅｅｄ（Ｄａｔｕｒａ，ｓｔｒａｍｏｎｉｕｍ），牵牛花ａｎｎｕａｌｍｏｒｎｉｎｇｇｌｏｒｙ（ｌｐｏｍｏｅａｓｐｐ。）苋菜ｐｉｇｗｅｅｄ（Ａ