STUDY ON RESIDUES OF ~（14）C－FENITROTHION IN MODEL RICE－FISH ECOSYSTEM AND FIELD RICE－FISH ECOSYSTEM

ＳＴＵＤＹＯＮＲＥＳＩＤＵＥＳＯＦ~（１４）Ｃ－ＦＥＮＩＴＲＯＴＨＩＯＮＩＮＭＯＤＥＬＲＩＣＥ－ＦＩＳＨＥＣＯＳＹＳＴＥＭＡＮＤＦＩＥＬＤＲＩＣＥ－ＦＩＳＨＥＣＯＳＹＳＴＥＭＺｈａｎｇＺｈｏｎｇｌｉａｎｇ（张仲良）；ＷａｎｇＨｕａｘｉｎ（王化新）；Ｇ?..     

高性能IGBT模块的设计考虑

本文对ＩＧＢＴ模块中功率芯片（ＩＧＢＴ和续流二极管）的优化设计进行了讨论。通过优化几个重要的工艺参数并改进器件的结构，ＩＧＢＴ不仅有足够的短路容量，而且正向压降与电流下降时间之间可实现最佳折衷。另外，续流二极管的反向恢复特性也有明显改善。通过采用衬底控制技术，ＩＧＢＴ模块的输出特性不受温度的影响，输出电流更稳，输出阻抗更高。本文详细介绍了整个设计考虑。     

紫外激光烧蚀金属Al靶诱导等离子体的发射光谱研究

通过测定紫外激光烧蚀Ａｌ靶诱导等离子体的发射光谱，研究了激光烧蚀Ａｌ靶的溅射过程和烧蚀环境气体对发射光谱强度的影响，提出电子碰撞激发模型，定性解释了烧蚀环境气体对等离子体发射光谱的增强效应。     

激光光束质量因子M~2的物理概念与测试方法

激光光束传输质量因子Ｍ２是一种全新的描述激光光束质量的参数，它能定量表征单模、多模光束传播特性。本文介绍Ｍ２的物理概念、特点、测试方法及近年来国外的研究概况。     

微光CCD摄像器件综合特性的分析与比较

ＣＣＤ的优良特性使其在微光电视技术领域得到了广泛运用。本文对各种微光ＣＣＤ摄像器件的综合特性例如信噪比、探测率、动态范围与计数模式等进行了详细的研究与对比，并得出基本结论。     

回转体拉深件毛坯直径的简捷计算及误差分析

通用的回转体拉深件毛坯直径的计算公式繁琐，不蝗记忆，特别是利用中线尺寸常出现小数点使计算复杂，本文针对此问题分别推导出了利用中线尺寸和不用中线尺寸时，毛坯直径的简捷计算公式。并进行了误差分析，最后用实例对简捷计算方法的正确性给予了验证。     

Effective single-band Hamiltonian for electron-phonon coupling in cuprate superconductors

We derive an effective single-band Hubbard type Hamiltonian for CuO₂ planes. The Hamiltonian includes both electron-electron repulsion and electron-phonon coupling to oxygen vibrational modes. We start with first-principles density functional theory parameters and then map onto a single-band model. Unlike previous mappings to a single-band Hamiltonian, ours explicitly preserves the Fermi surface shape and matrix elements of the many-band Hamiltonian. We consider both in-plane oxygen breathing modes as well as out-of-plane tilting modes. The latter modes have a quadratic electron-phonon coupling, and are also highly anharmonic in La₂CuO₄ based superconductors. The coupling to breathing modes is too small to account for highT _c, while the coupling to quadratic modes is much stronger even though they would be neglected in a standard Migdal-Eliashberg approach to superconductivity.     

Ground state systematics and collective dipole excitations of spheroidally deformed sodium clusters in a diffuse jellium model

We solve the Kohn-Sham equations self-consistently in the local density approximation for spheroidal sodium clusters in the particle range 8 ≤ Z ≤ 40. We use a smooth fermi-like jellium density to simulate the influence of the ions in the surface region and obtain similar results as Ekardt and Penzar, but slightly different regions of prolate-to-oblate transitions. We present the systematics of potential energy curves with respect to transitions between oblate, prolate and spherical shapes. Shape transitions occur at particle numbers 12/14 (prolate/oblate), 18/20/22 (oblate/spherical/prolate) and 30/32 (prolate/oblate), which are in good agreement with experimental results. The quadrupole and hexadecupole overlap of the electron density with the jellium is investigated, showing a strong hexadecupole dependence for selected clusters. Collective dipole resonances are described in a simple sum rule approach, which reveals a double splitting according to the different resonance frequencies along the principal axes of the spheroid. The systematics of the resonance peaks for the larger clusters with Z ≥ 20 is in good agreement with experimental results.     

一种适合于听觉神经刺激的可编程双相恒流脉冲发生器

正向设计了一种适合于听觉神经刺激的可编程双相恒流脉冲发生器，它可根据耳聋患者的要求和不同的语音信号，控制刺激电流脉冲的幅度和宽度，以及脉冲之间的间隙。本文阐述了电路的设计要求和方法，并给出了实验结果。采用标准３μｍｐ阱ＣＭＯＳ工艺，在上海贝岭微电子制造有限公司流片。目前已成功地用于多道人工电子耳蜗接收刺激器中。     

CVD金刚石工具膜生长特征SEM观察

本文用不热形变栅状直丝化学气相沉积（ＣＶＤ）法生长金刚石膜，在Ｓｉ及ＷＣ－Ｃｏ硬质合金衬底上金刚石膜晶面显露规律随衬底温度和甲烷浓度而异，经适当表面处理及选择合适的工艺条件，当生长初期衬底上就呈现出良好晶形的沉积膜，衬底与膜之间的粘结力能得到提高。Ｒａｍａｎ谱分析表明此膜仅具有特征金刚石１３３２ｃｍ￣（－１）峰，通过ＳＥＭ观察揭示出盒刚石膜可在表面、侧面及棱上生长，并与衬底有良好的联结。