实施施工阶段建设监理的全过程管理

为使工程建设监理纳入规范化和程序化的管理，通过工程建设监理实践，我们归纳出了监理工作中的几点具体作法，可供从事工程建设监理方面的有关人员参考。     

空间环型区域上的关联函数

本文利用锥函数方法，给出空间环型区域上关联函数的一种计算方法。     

复合超细丙纶及应用

对国内外细旦丙纶的开发和发展进行了介绍，阐述了单丝纤度为０．１～０．５ｄｔｅｘ的复合超细丙纶的制造方法、原材料规格、复合剥离技术以及产品质量。重点讨论了复合超细丙纶及织物的舒适性、染色性和卫生性，应用于织造、服装领域。     

Correction for photon attenuation in SPECT: analytical framework, average attenuation factors, and a new hybrid approach

We provide a unified framework for the investigation of convergence properties of the iterative algorithms for photon attenuation correction in SPECT, including the iterative Chang method--a commonly used approach in which an average attenuation factor calculated over all projection angles is employed in a pointwise correction scheme. A new average attenuation factor calculated along the projection line is introduced, which can compensate exactly for the attenuation effect in the case of a uniform activity distribution. We propose a new hybrid approach in which we use this new average attenuation factor initially and then shift to the iterative Chang method in later iterations. This hybrid approach was evaluated in a simulation study by use of a computer-generated phantom with both non-uniform activity and non-uniform attenuation distributions. The results demonstrate that this hybrid approach improves the convergence speed of the iterative Chang method and produces reconstructed images of high quality.     

Synergistic interaction of D1 and D2 dopamine receptors in the modulation of the reinforcing effect of brain stimulation.

Rats were trained to press a bar for hypothalamic stimulation, and a frequency-response function was plotted. Quinpirole (a selective D2 agonist) facilitated self-stimulation when injected alone but failed to show the facilitatory effect when injected either 1 hr before or 1 hr after injection of SCH 23390 (a D1 antagonist). Injection of reserpine followed by α-methyl-p-tyrosine virtually eliminated self-stimulation. Subsequent injection of either SKF 38393 (a D1 agonist) alone or quinpirole alone did not restore self-stimulation, but a combination of quinpirole and SKF 38393 did. Results suggest that a D2 dopamine agonist facilitates the reinforcing effect of brain stimulation only if D1 receptors are activated by endogenous dopamine or by an exogenous agonist. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

多路缓变信号记录仪

本文介绍了多路缓变信号记录仪的系统构成,研究设计了多路缓变信号记录仪的硬件电路,较详细地介绍了该系统的工作原理及软件编程要点。     

三维目标旋转畸变不变光学相关滤波器组的设计

研究了三维目标旋转畸变不变光学相关滤波器组的设计原理，完成了滤波器组参数的计算和编码，以及光学相关识别的计算机模拟。     

InGaAs（P）分别限制应变单量子阱激光器的优化设计

针对较常用的ＩｎＧａＡｓ（Ｐ）分别限制应变单量子阱激光器，给出了为得到最大净增益的优化设计参数。对于激射波长为１．５５μｍ的无应变激光器，最佳的光限制层波长为１．２４μｍ，厚度为１００ｎｍ。当阱材料引入压缩应变后．由于价带的有效状态密度减小，量子阱激光器的微分增益变大，阱深的增大对增大线性增益的效果更加明显．所以最佳光限制层的波长将变短，为１．２０μｍ     

异型材挤出口模内的流动模拟

本文根据挤出机理，对口模内的流动行为进行适当的简化和假定，建立了挤出口模内流动分析的数学模型，并采用横截面／假想区域法实现了复杂异型材挤出口模内的数值模拟，数值分析结果与三维有限元解和解析解的对比，取得了满意的效果。     

60MHz相位介电测井仪模拟刻度器设计

文章以介电测井理论为基础，借鉴感应仪的模拟刻度方法，对大庆油田的６０ＭＨｚ相位介电井仪的模拟刻度进行了研究。参照国内外有关资料，提出了模拟刻度器的设计模型，通过理论分析与计算，建立了一套模拟刻度方法。现场初步试验，该方法取得了一定物效果，为进一步提高仪器的测量精度提供了依据。