简述测井解释软件三柱状的设置及使用方法

在测井煤层解释中对于达到或者超过可采厚度的煤层需要提供1：50的测井曲线成果图。在较早的测井解释软件中只提供单柱状测井曲线成果图。近几年开发的测井解释软件中提供了较为完善的扩展功能，通过功能扩展可以实现测井曲线的三柱状解释。

短沟道三材料柱状围栅MOSFET的解析模型

在柱坐标系下利用电势的抛物线近似,求解二维泊松方程得到了短沟道三材料柱状围栅金属氧化物半导体场效应管的中心及表面电势。推导了器件阈值电压、亚阈值区电流和亚阈值摆幅的解析模型,分析了沟道直径、栅氧化层厚度和三栅长度比对阈值电压、亚阈值区电流和亚阈值摆幅的影响。利用Atlas对具有不同结构参数的器件进行了模拟研究和比较分析。结果表明,基于解析模型得到的计算值与模拟值一致,验证了所建模型的准确性,为设计和应用此类新型器件提供了理论基础。

管状和柱状磷酸三钙陶瓷人工骨修复长骨大段骨缺损的对比研究

为研制理想的、能较快修复长骨大段骨缺损的陶瓷人工骨 ,我们将管状磷酸三钙 ( TTCP)和柱状磷酸三钙 ( CTCP)陶瓷人工骨分别植入兔桡骨于 1cm缺损处。术后 4、12周时取材 ,作大体组织形态学、新骨形成定量观察及抗折强度测试。术后 4、12周时 TTCP内新骨形成量明显多于 CTCP,术后 12周时 ,植入材料与宿主骨结合紧密 ,TTCP的降解速度快于 CTCP,抗折强度前者明显高于后者 ( P<0 .0 1)。研究结果表明 ,TTCP比 CTCP设计更合理 ,能更快促进长骨大段骨缺损的修复 。

Vertical Distribution Characteristic of Nitrogen in the Core Sediments of Three Rivers Estuary in Poyang Lake

The vertical profile distribution characteristics of nitrogen in core sediments of Three Rivers Estuary in Poyang Lake were studied.The results showed that TN content in core sediments ranged from 480.0 to 1 900.0 μg/g with the change of depth,which was divided into three distribution types as follows:TN content decreases gradually with the increase of depth,TN content increases gradually with the increase of depth or higher content in the middle but lower content in two ends.NH4+-N content ranged from 8.7 ...

Meshing Theoretical Study and Simulation on Cylindrical Tri-sine Oscillating Tooth Gear Drive

The structure of cylindrical tri-sine oscillating tooth gear drive is presented. Based on the space meshing theory, equations of meshing and tooth profile are established and its meshing theory is studied. Using Pro/E, this system is modeled and simulated,which is compared with the above-established equations.