Cartesian product of compressible effect algebras

In the paper, we prove that is compatible with p}, the set of commutant of p, and , the projection commutant of a, are all normal sub-effect algebras of a compressible effect algebra E, and is a direct retraction on E} is a normal sub-effect algebra of an effect algebra E. Moreover, we answer an open question in Gudder’s (Rep Math Phys 54:93–114, 2004), Compressible effect algebras, Rep Math Phys, by showing that the cartesian product of an infinite number of E _i is a compressible effect algebra if and only if each E _i is a compressible effect algebra. This work was supported by the SF of Education Department of Shaanxi Province (Grant No. 07JK267), P. R. China.     

基于智能优化控制的磨矿过程综合自动化系统

本文首先概述了磨矿的工艺过程和控制要求,然后从系统结构与功能、智能优化控制策略等方面详细描述了磨矿过程综合自动化系统,最后谈到该系统的实施及应用效果。     

粉煤灰磁化肥对杂交水稻效应研究

粉煤灰磁化肥在水稻土上对水稻作物试验结果表明：粉煤灰磁化肥在水稻土上一般用量为９２６ｋｇ／ｈｍ２左右．粉煤灰磁化肥比对照增产２７．７％,增产１９７７．８ｋｇ／ｈｍ２;比当地农民习惯施肥增产１０．６％,增产８７０ｋｇ／ｈｍ２;　比未磁化粉煤灰复混肥增产５．９％,增产５０７　ｋｇ／ｈｍ２．最高产量施用粉煤灰磁化肥为１１６９　ｋｇ／ｈｍ２,水稻产量为９２５３　ｋｇ／ｈｍ２;最佳产量施用粉煤灰磁化肥为９２６　ｋｇ／ｈｍ２,水稻产量为９１３１　ｋｇ／ｈｍ２．粉煤灰磁化复混肥在改善水稻生物学及经济性状,提高叶绿素含量和光合速率方面有显著的效应．     

计算机维修模拟训练系统的设计与实现

探索了一种在多媒体环境下进行计算机及外部设备维修教学、训练的新方法 ,介绍了计算机维修模拟训练系统的设计与实现 ,给出了主要的设计思想、总体结构及关键技术。     

镁铝水滑石对PVC热稳定性能的影响

采用比色法、热失重法研究了镁铝水滑石、铅盐、有机锡、以及镁铝水滑石与铅盐、有机锡复配的复合稳定剂对PVC的稳定效果,考察了铅盐稳定体系和镁铝水滑石与有机锡复合稳定体系对PVC力学性能和流变性能的影响.结果表明镁铝水滑石分别与铅盐、有机锡进行复配均具有较好的协同效应且后者对PVC的稳定效果更好.其中,VC、镁铝水滑石和有机锡以100.5.5质量比复配的复合体系具有较好的力学与加工流变性能.     

Changes in Subsidiary Reaction Time and Heart-Rate During Car Driving,Passenger Travel and Stationary Conditions*

Distinction can be drawn between three types of letter sorting machines and these types can also be used to classify other kinds of machine and task. In one type (‘paced ’) the speed of operation is set by the machine : in another (‘ unpaced’) the speed is determined by the operator's own actions, and in a third (‘ lagged ’) the speed is determined by the operator, but a minimum time (a ‘ time lag ’) has to elapse between one operation and the next. The performance of 7 operators on a lagged letter sorting machine was observed over a period of 9 months. Records were taken of mean sorting rate, and of the distribution of sorting times. Practice effects are shown to have been continuing at the end of this period, and it is argued that the distribution of sorting times has been affected by the machine' lag.

By assuming a distribution that would be expected if there were no lag, tables are presented which estimate what the sorting rate would be (a) if there were no log at all, (b) for different values of lag and (c) for different values of paced rate.     

A data mining technique for discovering distinct patterns of hand signs: implications in user training and computer interface design

Hand signs are considered as one of the important ways to enter information into computers for certain tasks. Computers receive sensor data of hand signs for recognition. When using hand signs as computer inputs, we need to (1) train computer users in the sign language so that their hand signs can be easily recognized by computers, and (2) design the computer interface to avoid the use of confusing signs for improving user input performance and user satisfaction. For user training and computer interface design, it is important to have a knowledge of which signs can be easily recognized by computers and which signs are not distinguishable by computers. This paper presents a data mining technique to discover distinct patterns of hand signs from sensor data. Based on these patterns, we derive a group of indistinguishable signs by computers. Such information can in turn assist in user training and computer interface design.     

Learning from errors in a driving simulation: effects on driving skill and self-confidence

Two experiments investigated the effect of making errors during training (error training) on a driving simulator versus learning from examples of errors (guided error training) on driving skill and confidence. Experiment 1 indicated that compared with errorless learning (where participants drove through a training run not designed to elicit errors), error training led to significantly better transfer to driving tests that were analogous to those situations encountered in training and more effective use of strategies for coping with a novel driving situation. Error training also reduced self-confidence in driving skill at the end of training relative to errorless learning. Experiment 2 provided weak evidence of the superiority of guided error training over errorless learning (where the driver in the video did not make any errors) on analogous tests, and no evidence of transfer to a novel test. Furthermore, guided error training did not influence self-confidence in driving skill. The potential value of driving simulators in providing active processing during driver training is discussed, along with the effects of passive and active exposure to errors on driver confidence.     

经管类专业应用型人才培养模式研究

民办高校应用型人才培养模式是民办高校为培养应用型人才而探索形成的一种可操作性的经验与理论架构。本文简单阐述了经管类专业应用型人才培养的意义,构建了经管类专业应用型人才培养方案,主要是构建以企业为依托的合作办学模式,构建＂两平台＋N模块＋一拓展＂课程体系,构建以学生为主体的教学方法和＂双师型＂师资队伍。     

农业类本科院校网络工程专业课程体系建设研究

我国网络工程专业毕业的学生人数已达相当规模,而在社会上的就业情况却未达到预期的目标,究其原因是学生在校所学课程与社会需求不匹配。本文就网络工程专业中应用型人才的需求,重点讨论专业方向、课程体系等方面的问题。