Effects of Dual-Electrode Biasing on Er in a Toroidal Plasma

Two externally biased electrodes were inserted into the plasma on the KT-5C tokamak to test the effects on modifying the radial electric field Er, other than single biasing. Using various combinations of biasing voltage,the influences of double biasing are compared with the single biasing. It turns out that the effect of dual-biasing is also effective as a single one, but the outer electrode seems to be shielded by the inner one and show less influence. The results clearly show that the radial electric field Er changed by external biasing is intrinsically an effect localized at the edge of the plasma, which is caused by the electrode induced radial current; and dualelectrode biasing using the method similar to the single biasing seems not to be able to increase more distinctly the peaking effect on Er than the single biasing.     

Experimental 511 W Composite Nd：YAG Ceramic Laser

We demonstrate a 511 W laser diode pumped composite Nd：YAG ceramic laser. The optical pumping system is consisted of five laser diode stacked arrays arranged in a pentagonal shape around the ceramic rod whose size is φ6.35×144mm. When the pumping power is 1600 W, the cw laser output up to 511 W at 1064nm can be obtained with a linear piano-piano cavity, and the optical-to-optical efficiency is 31.9%. To our knowledge, this is the highest value of laser output by using a newly invented composite Nd：YAG ceramic rod as the gain medium.     

高灵敏度X光探测系统

对高灵敏度X光探测系统结构和灵敏度进行了阐述，给出了厚度差为0．1mm的铜台阶在低照射量下的透视图像及处理结果，证明了系统具有高的灵敏度。     

10瓦级双包层光纤激光器

考虑到所用大功率激光二极管的光谱特性，对光纤激光器的基本法布里-珀罗腔型稍加改变，研制出激光二极管抽运的10w级双包层光纤激光器，获得最高功率为11．8w、波长1100mm的单模激光输出。     

Optical fiber temperature sensor based on wavelength-dependent detection

Semiconductor fiber temperature sensors have been used widely in many fields, but most of them pick up temperature by measuring the optical intensity of certain fixed narrow-band in absorption spectrum.Furthermore, they are sensitive to the loss of optical intensity and the fluctuation of light source power.The novel temperature measurement system proposed in this paper is based on the semiconductor absorption theory and the spectral analysis of method. To measure temperature, the sensor model detects not the certain narrow-band spectrum but the most spectra of the optical absorption edge. Therefore the measurement accuracy and the stability can be improved greatly. Experimental results are in agreement with theoretical analysis results perfectly.     

Zn~（2＋）－Na~＋离子交换动力学 Ⅰ．溶液浓度和搅拌速度的影响

本文采用测量液相浓度变化和Ｘ射线电子探针分析树脂颗粒内浓度分布两者相结合的方法，研究了强酸性阳离子交换树脂上Ｚｎ２＋—Ｎａ＋交换的动力学，讨论了溶液浓度和搅拌速度对交换过程的影响以及在判断交换速率控制机理时应注意的问题．     

流通池—介质交换—阳极溶出伏安法同时测定铜,锑,铋

本文研究了同时测定Ｃｕ（Ⅱ）Ｓｂ（Ⅲ）Ｂｉ（Ⅲ）的方法。在盐酸溶液中对Ｃｕ（Ⅱ），Ｓｂ（Ⅲ），Ｂｉ（Ⅲ）进行预电解富集，经介质交换在选定的丙二酸－盐酸溶液中进行了差示脉冲阳极溶出伏安法（ＤＰＡＳＶ）测定，相邻溶出峰的△Ｆｐ＞８０ｍＶ，波形完好。     

中心流形理论在广义Maxwell—Bloch激光方程中的应用

在好腔近似下，应用中心流形理论约化广义Ｍａｘｗｅｌｌ－Ｂｌｏｃｈ激光方程，与绝热消去法比较，它将引起小的修正，数值结果表明，该修正并不发迹系统的主要动力学性质。     

国土规划决策支持系统研究

当前，世界各国均不同程度地面面临人口，资源，环境，土地与粮食五大问题，因此，研究和探索这些因素间的相互联系和相互制约关系，制订有关的规划和措施以指导国土的开发整治和经济建设，使人口增长，资源利用，环境改善协调发展的相对平衡，是我国社会主义建设发展的需要。