基于Lab VIEW的小型汽油机磁电机点火提前角的测量

本文介绍了磁电机点火系统的点火提前角测量原理。对点火系统的点火信号和触发信号进行采集、调理，再用单片机进行处理，最后用LabVIEW进行点火提前角数据存储和显示。     

聚四氢呋喃及其下游产品的开发应用

本文论述了聚四氢呋喃技术进展、氨纶弹性纤维发展现状和国内外聚四氢呋喃产能和需求。     

海底沉积物中天然气水合物生成和分解规律研究进展

对国内外有关海底沉积物中天然气水合物生成和分解规律方面的研究进行了详细调研,得到如下结论:天然气水合物的生成和分解条件在海底沉积物中与在井筒、管道中有明显不同,其主要原因是多孔介质中流体与孔隙壁面间的界面效应对海底沉积物中天然气水合物的形成条件会产生明显影响;在海底沉积物中天然气水合物生成和分解条件的数值模拟技术研究方面,研究者大都假设以天然气水合物作为盖层的成藏类型,借助常规油气藏数值模拟技术进行模拟研究;影响海底沉积物中天然气水合物生成和分解条件的因素很多,因此海底沉积物中天然气水合物生成和分解规律研究必须借助试验模拟、数值模拟和现场测试相结合的综合方式进行。该调研成果可为今后天然气水合物经济有效开采技术方案选择和进行天然气水合物危害控制等提供参考。     

针刺合成革基布质量的探讨

分析了针刺合成革基布质量的控制要素 ,以及预针刺机的牵伸比和针刺机的步进图对基布质量的影响     

二甲基二烯丙基氯化铵(DMDAAC)及其聚合物研究新进展

二甲基二烯丙基氯化胺 ( DMDAAC)是一种水溶性阳离子单体 ,其均聚物和共聚物 ,高效价廉 ,可广泛应用于油田、造纸、水处理、医药等领域 ,引起了化学工作者的普遍关注。综述了近五年来DMDAAC单体的合成、聚合方法以及均聚物和共聚物研究应用新进展 ,并对今后的研究重点提出一些建议     

三峡工程明渠提前截流方案及水力学试验研究

论述了三期明渠提前截流方案的综合比较分析及截流水力学试验研究成果。认为拟定的提前截流诸方案各有利弊 ,其截流难度较初设方案显著增加。对于截流“基本方案”及“比较方案”的成功实施 ,必须辅之以一定的工程技术措施降低截流难度     

世界乙烯工业及其进展

阐述了世界乙烯产能需求现状，近扑扩能增产预测，乙烯原料分析以及乙烯生产的技术进展。     

Short cue presentations encourage advance task preparation: A recipe to diminish the residual switch cost.

In the task-switching literature, it has frequently been demonstrated that although advance task preparation reduces the switch cost, it never really eliminates the switch cost. This remaining residual switch cost received much attention, and it has been argued that advance preparation is restricted in nature. In the present study, the role of task-cue presentation in the establishment of the residual switch cost was investigated. In 4 experiments, the cue was removed during the preparation interval, and it was hypothesized that this would encourage participants to complete advance task preparation. The results of all 4 experiments provided support for this hypothesis: When the cue was presented for a short time and then removed, the residual switch cost completely disappeared. This was found for different cue types. Furthermore, Experiment 3 demonstrated that it was not the presence of the cue itself but merely differences in advance task preparation that caused the effects. This suggests that advance task preparation is not as restricted in nature as previously assumed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

塔格糖制备方法研究进展

塔格糖是一种天然的低能量填充型甜味剂，并具有抑制高血糖、改善肠道菌群和不致龋齿等多种生理功效。目前主要通过生物和化学两种方法合成。     

Numerical Simulation of Independent Advance of Ore Breaking in the Non-pillar Sublevel Caving Method

The mechanism of stress generation and propagation by detonation loading in five separate independent advance of ore breaking patterns is discussed in the paper. An elastic numerical model was developed using AN- SYS/LS-DYNA 3D Nonlinear Dynamic Finite Element Software. In this package ANSYS is the preprocessor and LS-DYNA is the postprocessor. Numerical models in the paper to actual were l：10 and the element mesh was dissected in scanning mode utilizing the symmetry characteristics of the numerical model. Five different advance rates were studied. Parameters, such as the time required to maximum stress, the action time of the available stress, the maximum velocity of the nodes, the stress penetration time, the magnitude of the stress peak and the time duration for high stress were numerically simulated. The 2.2 m advance appeared optimum from an analysis of the simulation results. The results from numerical simulation have been validated by tests with physical models.