<正> Ⅰ. INTRODUCTION In this paper, fr&#243;m the molecular orbital graphical theory we have derived the closed formula......

Hello，boys and girls.我们知道英语是一种非常程序化的语言，所以了解生活中常用的固定表达就会很有用。今天就请Nick和Jessie来给我......

关于怎么吃这个问题,中国人或许最谙其道。我在这里谈论的并不是他们那精美的高级烹饪,或是他们古老而传统的烹饪法,而是中国普通......

决策精英们想让我们相信,劳动力规模萎缩即意味着经济繁荣的终结。实际上,那意味着社会财富再分配。生育高峰期出生的那一大批人正......

Four celebrities highly accomplished in their diplomatic,economic,legal and environmental specialties tell their own sto......

Five new techniques in electrometric titration are described: 1.Oscillopolarographic titration without incision at 1 mi......

像世界上其他语言一样,英语是世界上最发达的语言之一,这具体表现在它有丰富多彩的同义词。本文就什么是同义词,产生同义词的历史......

随着我国改革开放的不断深入和发展,各级办公室的对外业务也相应增多,不可避免地要接触、使用国际上的通用语——英语。下面着重......

请下载后查看，本文暂不支持在线获取查看简介。 Please download to view, this article does not support online access to view......

Ancient Chinese metal art arerepresented by two styles:bronzewares in the Shang(c 1700-c 1100)and Zhou(c 1100-256 BC)dy......

Hydrological regime has been widely recognized as one of the major forces determining vegetation distribution in seasona......

The essence of a city lies in “people”. Cities get to be built and developed for people and by people. The increase of......

Editor’sNoteHongKongwillreturntoChinaonJulylst,1997afterhavingbeenun-dertheBritishcolonialruleformorethan150years.Itisa......

In order to meet the social needs,to im-prove the postal service and to speed up themail delivery,beginning from August......

According to the characteristics of sports science research and in the light of the current development of our times, th......

The combination of both 4,4′-bipyridine(4,4′-bipy) and dihydrogen phosphate anion ligands with copper(Ⅱ) results in t......

Unavoidable time delays in the feedback path of a controlled mechanical system may render the system unstable, and bloc......

请下载后查看，本文暂不支持在线获取查看简介。 Please download to view, this article does not support online access to view......

The subjunctive mood is a very controversial point in English.English does have subjunctive mood to describe some anomal......

李润兰是天津市第一个,也是唯一的一个女区长。她所管辖的和平区是天津市的中心金融商业区。从政27年的她体会最深刻的是:当官,就......

A new threshold secret sharing scheme is constructed by introducing the concept of share vector, in which the number of ......

Housing liquidity measures the ability to convert housing to cash as an important characteristic of housing stock. A sim......

The crystal and molecular structures of (μ-PhCH2S)(μ-CH3C(O)CH2S)-Fe2(CO)6 have been determined by X-ray diffraction ......

仅仅凭肉眼观察,我们并不能分辨出一个人是否感染上HIV,HIV感染在两个或更多的人之间得以传播,部分原因就在这里。因为一个健康的......

The English language is different from the Chinese language in many ways.In Chinese there is noconcord,while in English ......

介绍基层税务局发票管理（增值税专用发票，普通发票）计算机网络系统的设计思想、系统功能、开发与运行中的几个问题。......

主要研究了一类同时带有两类顾客，Bernoulli反馈的M／G／1重试排队系统．寻求服务的顾客分为两类：普通顾客和永久顾客．普通顾客服务完成后，可......

对食饵具有常数收获率的Kolmogorov捕食者-食饵系统进行了定性分析,得到了该系统存在稳定(或不稳定)分界线环和唯一稳定极限环的条......

[Objectives]To protect cultivated land and ensure national food security and to forecast the cultivated land area of Chi......

目的比较超声引导下针刀与普通针刺治疗腰背部肌筋膜炎的临床效果。方法收集2018年3月—2019年3月广西壮族自治区人民医院康复治疗......

云覆盖下地表温度的估计,是热红外遥感研究的一个前沿问题。地表温度具有较高的空间相关性,理论上可通过空间内插值方法来估计云覆......

随着先进制造技术的发展,采用机器人实现焊接过程自动化、柔性化与智能化已成为必然趋势。近年来,我国焊接机器人的应用主要集中在......

有序分类是现实生活中广泛存在的一种分类问题。基于排序熵的有序决策树算法是处理有序分类问题的重要方法之一，这种方法是以排序互......

“同书异号”是图书分类中的常见现象。《中图法》的改版、出版形式不同、各馆规定不一和有卡无书，是造成同书异号的客观因素；查重失......

<正> 功能意念的表达离不开语言形式。同一功能或意念可有多种语言表达形式。为此,本文拟就“Addition(添加),Exception(排除)”的......

采用与普通硅酸盐水泥混凝土对比的方法,通过对阿利特-硫铝酸钡钙水泥混凝土试件经受高温作用时表观现象的观察分析和力学性能测试......

谐振电路不仅是电子学中的一个重要电路，也是电力电子学中很重要的电路。对于谐振电压、电流的求解一般采用微分方程组的方法，计算十......

在高埋深、高地应力地层中进行大断面引水隧洞施工中,岩爆的发生将危及施工安全和洞室成型质量.基于此,结合锦屏二级水电站2#引水......

<正> 在中学英语课本中,有这样一个句子:However,new shoots of bamboo will come p from around the roots ofthe old ones。(SB......

In this paper, the hyperspherical harmonics used for solving the three and four body problems in nuclear physics are giv......

The second author studied the nonlinear stability of N-layer quasi-geostrophic flow subject to perturbations of paramete......

The paper concludes that the energy given by Einstein’s famous formula E = mc2 consists of two parts. The first part is......

以北京理工大学珠海分院教学楼为研究对象,对无次梁实心大跨厚板与有次梁普通楼板两种方案进行了研究,比较了两种方案的优劣性,主......

该文研究了Rn中半线性波动方程utt-Δu=(1+|x|2)α|u|p的小初值Cauchy问题解的生命跨度估计.主要利用了改进的Kato型引理,得到了当......

文章通过Surpac软件建立了SICOMINES铜钴矿的地质数据库,划分矿化区域,应用地质统计学理论分析了矿床Cu品位变异函数数学模型,采用......

<正> 在英语学习过程中,介词固定搭配形式也是初学者感到棘手的事情。英语中某些结构形式很特殊,与汉语的结构形式截然不同。如在......

A previously developed model of a 2-dimensional air flow with constant horizontal shear is used to estimeate the accurac......

本文针对多处理机系统构造了一类并行块隐式方法。具体地给出了此类方法的一个具有两个进程和二阶精度的并行计算公式,并证明了该......