涤纶工业丝环吹风改造的设计计算

应用PET纤维的冷却成形理论 ,结合空气调节的相关知识 ,提出了环吹风的设计计算方法 ,对涤纶工业丝环吹风进行了设计改造 ,满足了纺丝工艺要求     

抽油机井系统效率简析

油田生产中广泛使用抽油机采油,机械采油的系统效率主要有地面效率与井下效率。在实际生产中,地面效率容易检测、计算和调整,井下效率则取决于产液量、动液面、泵效以及管柱的状况。文章仅对抽油机井系统效率进行简单分析与计算,旨在为优化设计抽油机运行参数提供参考。     

普通稠油油藏启动压力梯度求解方法与应用

利用微观尺度管流模型,结合普通稠油流变特征,提出了在考虑稠油流变性条件下微观启动压力梯度计算方法.对渤海渤中18块不同渗透率岩心进行室内驱替实验,通过对实验数据的回归分析,得到不同粘度普通稠油油藏启动压力梯度与地层平均渗透率关系,并绘制了启动压力梯度的图版.将研究结果应用于普通稠油油藏,给出了利用启动压力梯度确定极限泄油半径及合理井距的理论计算方法.     

Curie Temperatures of III–V Diluted Magnetic Semiconductors Calculated from First-Principles in Mean Field Approximation

Electronic structure and ferromagnetism in III–V compound-based diluted magnetic semiconductors (DMS) are investigated based on first-principles calculations by using the Korringa-Kohn-Rostoker method combined with the coherent-potential-approximation. The stability of the ferromagnetic phase in GaN-, GaAs-, GaP-, GaSb-based DMS is investigated systematically. The calculations show that 3d-impurities from the first-half of the transition metal series favor the ferromagnetic state, while impurities from the latter-half of the series exhibit spin-glass behavior. This chemical trend in the magnetism is explained by the double exchange mechanism taking the local symmetry at the impurity gap states into account. Curie temperatures of GaAs- and GaN-based DMS are estimated by using the Heisenberg model in a mean field approximation with the parameters calculated from first-principles. It is suggested that room-temperature ferromagnetism can be realized in these systems.     

The Person Reference Process in Spontaneous Trait Inferences.

Five studies examined whether spontaneous trait inferences uniquely reference the person who performed a trait-implying behavior. On each study trial in 5 studies, participants saw 2 faces and a behavioral sentence referring to one of them. Later, participants saw face-trait pairs and indicated whether they had seen the trait word in the sentence presented with the face. Participants falsely recognized implied traits more when these traits were paired with actors' faces than with control faces. This effect was replicated for a large set effaces (120), after a week delay between study and recognition test, when equal attention was paid to each face, and when the orientation of the face at recognition was different from the orientation at encoding. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

现役水工钢闸门结构可靠性鉴定时荷载取值分析

采用类比法确定现役水工钢闸门结构的荷载评估基准期。以静水压力为例，得了其在荷载评估基准期内的统计参数，讨论了闸门主梁受弯碱坏时可靠指标随继续使用期的变化。     

基于开关电流技术的连续小波变换的实现方法

开关电流技术是一种新的模拟抽样数据处理技术。开关电流电路具有一般电路不具有的优点，与标准数字CMOS工艺兼容。连续小波变换是分析非平稳信号的有力工具，在信号处理上有广泛的应用。本文提出用开关电流技术实现连续小波变换的方法，并用Matlab仿真证明了其理论可行性。     

一种新型递减曲线的简单求法与应用

通过对油气藏产量递减的研究、线性最优化方法的分析研究及文献[1]提出的这种新型递减曲线的研究，提出了解这种方程的一个简单求法。通过现场的实例应用表明：提出的方法具有简单、方便、方法可靠的优点。采用此方法时，产量不以年为单位而是以月为单位进行计算，这将使计算更准确、更合理。     

人工神经网络理论及其应用

简要介绍了人工神经网络的发展过程和基本理论，从神经网络具有自学习功能、联想存储功能和高速寻找优化解的能力三个方面论述了其特点和优越性，详细阐述了在模式识别、信号处理、自动控制、人工智能、自适应的人机接口、优化计算、通信以及其它方面的应用，探讨和分析了其发展前景。     

GPRS手机入网测试自动化

全球移动通信系统(GSM)广泛的应用于现代通信系统就在于其良好的兼容性,不同的移动设备之间在遵守一定协议规范的条件下可以相互通信;本设计测试的是GSM第11系列GSM11.10,他包括诸多测试项,只对接收机参考灵敏度电平在GSM900与DCS1800两个频段进行测量。给出了传统形式下的手动测试和自动测试平台的比较,并建立了收信机参考灵敏度指标的自动测试平台。