Bernoulli数模2r和3r的同余式

设{Bn}为Bernoulli数,m、n为自然数,本文证明了同余式(2-22n)B2n≡1-4n ∑mk=1(2n)/(2k)24kB2k (mod 24m 3)与(3-32n)B2n≡2-6n 2∑mk=1(2n)/(2k)32kB2k (mod 32m 1).取m=1,2,得到[5]中宣布的(2-22n)B2n(mod 27)与(3-32n)B2n(mod 35)的简单同余式.     

基于DELPHI5的高校选修课管理系统的设计与实现

主要介绍高校选修课管理系统的设计思想，并着重分析和讨论了后台数据库的设计方法和原理，最后讨论了运用Delphi5开发该系统的整个过程。     

金属在福州地热水中的腐蚀热力学研究──(I)、铜—地热水系统

作者从热力学角度以电位－ｐＨ图探讨金属在福州地热水中的腐蚀趋势．本文报导铜－地热水系统，采用ＢＡＳＩＣ语言编制程序在ＡＰＰＬＥ－Ⅱ微机上计算高温热力学数据，并以ＤＸＹ－８００绘图仪绘制电位－ｐＨ图．同时，测定了铜在福州Ｇｗ２井地热水中的实际腐蚀电位．结果表明：在此地热水中，当温度低于３１８Ｋ，铜表面生成Ｃｕ２Ｏ膜，高于３１８Ｋ，生成ＣｕＯ膜，二者都位于钝化区．     

钠快离子导体Na_(2.5)Zr_(2-x)Ti_xSi_(1.5)P_(1.5)O_(12.0)系统的研究

钠快离子导体Ｎａ_２．５Ｚｒ_２－ｘＴｉ_ｘＳｉ_１．５Ｐ_１．５Ｏ_１２．０系统ｘ＝０－２．０的化合物，由Ｎａ_３ＰＯ_４－ＺｒＯ_２－ＺｒＰ_２Ｏ_７－ＳｉＯ_２－ＴｉＯ_２为反应的起始原料，在９００℃－１２００℃的高温下反应数小时至二十小时制得。系统化合物的相变关系已探明，并测定了有关的单纯相在不同温度下的导电率以及电导激活能。相当于起始组成为Ｎａ_２．５Ｚｒ_１．０Ｔｉ_１．０Ｓｉ_１．５Ｐ_１．５Ｏ_１２．０的单纯相（标为２．５１相）在３００℃时的导电率σ３００＝１．８５×１０－２（Ω·ｃｍ）－１，其电导激活能为２３．６４ｋＪ／ｍｏｌｅ，相当于起始组成为Ｎａ_２．５Ｔｉ_２．０Ｓｉ_１．５Ｐ_１．５Ｏ_１２．０的单纯相（标为２．５２相）在３００℃时的导电率σ３００＝０．４６×１０－２（Ω·ｃｍ）－１，其电导激活能为２８．８９ｋＪ／ｍｏｌｅ．     

Functional magnetic resonance imaging of amphetamine craving

The aim of this study is to identify the brain activity associated with amphetamine craving for understanding the neurobiology of addiction by watching pictures of happy, sad or amphetamine. Brain activity was measured in 12 amphetamine addicts and 12 healthy subjects by fMRI while the subjects watched pictures designed to elicit happy feelings, sad feelings, or the desire to use amphetamine. The result demonstrated that amphetamine cues led to abnormally high cingulate and low frontal lobe activation in amphetamine addicts, who showed abnormalities in affect-related brain activation.     

An ERP study for the degrees of the difficulty in visual search

The present study mainly probed the relationships between ERP components and the degrees of difficulty in visual search. Three experimental and one controlled conditions were randomly selected. Results showed that the P1, N1, and P2 amplitudes and latencies had no significant differences among the three experimental and one controlled conditions, and the ERP waveforms of low perceptual load of visual search were different from that of high perceptual load. These results might indicate that the latencies and amplitudes of initial P1, N1 and P2 in high and low perceptual load conditions were almost the same. The ERP waveforms of parallel search were very different from that of serial search, and the ERP waveforms of serial search were very similar. The P3 amplitudes increased as the degrees of the difficulty in visual search decreased.     

液压传动实验教学的新模式

在液压传动实验教学改革的研究与实践中,针对传统的液压传动实验教学中演示性实验的不足,构建了培养设计力和创新能力为目标的液压传动实验教学新模式,并用实例说明实验实施的方案。     

国家自然科学基金面上项目资助额的地区分布规律

本文讨论了国家自然科学基金面上项目资助额的地区分布特点,发现基金面上项目资助额的地区分布与博士生人数的地区分布有很大的相关性,从而可以看出国家自然科学基金的资助在很大程度上取决于申请者所在地区具有的科研和教育水平。     

基于PLC的温度控制在电镀生产线中的应用

介绍了以三菱FX0NPLC为核心的温度控制系统在电镀生产线中的应用。简述了温度控制原理,论述了控制系统的设计方案及其软硬件的实现方法。实践表明该方法简单易行,适应性好,可靠性高。     

卢梭自然主义教育思想及其现实意义

本文在阐述卢梭自然主义教育思想的理论基础和主要内容的基础上，理论联系实际，结合现代社会的教育问题，揭示了卢梭自然主义教育思想的现实意义。