查询词典 implicit difference scheme

On the basis of intrapair and interpair correlation model, we have calculated the pair correlation energies of different kinds of systems, analyzed the changing rules of correlation energies of various electron pairs, and developed a reasonable and simple scheme called "Separating Large System into Smaller Ones". The basic idea of this scheme is that the correlation energy contributions of actual components in the ionic compound can be obtained using the correlation energy of ions with integer charge as the boundary conditions and incorporating the HF wave function or the distribution of electron cloud, then the total correlation energy of the system can be estimated by linearly summarizing the correlation contributions of these components.

在对内对间电子相关能理论模型的基础上，进行各类型化学键分子体系电子相关能的计算，分析电子对相关能的变化规律，建立合理的、&化整为零&的电子相关能简捷计算方案，其基本思想是对于离子键体系以整价离子的电子相关能为边界条件，通过HF波函数或电子云分布求得大体系中实际离子的电子相关能后，进行线性加和，即&化整为零、聚零为整&的思想。

The maximum number of shares in respect of which options may be granted under the Scheme to any eligible employee must not exceed 25% of the aggregate number of shares in respect of which options are issuable under the Scheme.

按该计划，授予每一位合资格员工的购股权最多为根据购股权计划可发行之股份总数25%。

Chapter 5 and 6 are concentrated on the fundamental problem how to con-struct finite-dimensional and infinite-dimensional Liouville integrable Hamiltonsystem.Starting from two isospectral problems,Tu's scheme is applied to gen-erate the corresponding CKdV hierarohy and coupled Burgers hievachy,andthey are shown to be Liouville integrable Hamilton systems.Two spectral prob-lems,which contain three and four potentials respectively,are also studied byTu's scheme.Two new Liouville integrable Hamilton hierarchy are estab-lished.A new general approach using Lenard's gradient sequence is presentedto obtain Lax integrable hierarchy and their zero curvature representation,andsome examples are given.The nonlinearization procedure is applied to theeigenvalue problem of coupled Burgerrs hierarchy.It is shown that underBargmann constraint,the spatial part of the Lax pairs is nonlimearized to be afinite-dimensional Liouville completeiy integrable Hamilton system.

第五、六章研究如何从一个谱问题出发构造可积发展方程族及其零曲率表示、Hamilton结构和判断Liouville可积性：通过对二类具有2个位势的等谱问题直接研究，利用屠格式生成了耦合KdV族和耦合Burgers族，并证明它们均为Liouville可积的广义Hamilton方程族；而通过分别具有3个和4个位势的等谱问题，遵循屠格式构造了二族新的Liouville可积的广义Hamilton方程族；给出了利用Lenard梯度递推序列产生发展方程族及其零曲率表示的一种方法，作为应用，讨论了CKdV族，BPT族及耦合Burgers族的产生及其零曲率表示；应用非线性化技巧，证明了在Bargmann约束下，耦合Burgers族的Lax组可被线性化为Liou-ville完全可积的Hamilton系统。

Through loss mechanism investigation for a gapped inductor ,copper winding scheme and litz wire winding scheme for gapped inductor was evaluated.

对高频率和大电流的开关功率变换器，电感器损耗对温升及变换器效率指标具有重要影响。

The mean generation interval of the flock is 5. 42 years of the current breeding scheme, and the ratio of input and output is 1∶11. 50, but the rate of mammitis will increase at the speed of 2%, at the same time, the number of daughters and sons of test bulls is not large enough for good accuracy for estimating test bull breeding value, so the breeding scheme in effect need to be improve.

D、在影响育种效益的诸因素中，单一的加大群体规模、育种群比例以及每年选留测验公牛数将在一定程度上提高育种效益和遗传进展，但随选留种子公牛数提高将降低育种效益和综合育种值遗传进展；在育种实践中应尽量扩大育种群规模和主动育种群比例。

A better algorithm and corresponding real time implementation scheme are proposed. By methodic arranging the clocks of CPU and AD/DA, the scheme can not only scale the pitch in two octave range effectively, but also process the real time input audio for synchronous scaling output. The experimental results on Windows platform indicate the modest CPU and memory consumption, so as to meet the requirement of real time applications.

改造后的实时变调算法与实现方案通过合理控制CPU时钟和AD/DA时钟的时序关系，不仅能够在两个八度音范围内进行有效的变调，而且能够对实时输入的音频信号进行同步变调输出，在Windows平台上验证实验还表明新方案具有较低的CPU占用率和内存消耗，能够满足实时应用的要求。

Shao proposes an improved digital signature scheme with message recovery based on ECC.It has overcome the weakness of Tzeng's scheme that lacks nonrepudiation and forward security.

Shao的基于椭圆曲线的具有消息恢复的数字签名改进方案，克服了Tzeng方案的缺乏不可否认性和前向安全性的弱点。

After carefully analyzed the principle of standard SVPWM and traditional overmodulation methods, this paper proposed one simple and effective overmodulation scheme. Experiments were carried out in one 1.5kW induction motor and its results were recorded and analyzed by PZ4000 Power Analyzer and the proposed scheme were proved to be effective.

在分析了标准SVPWM算法和常见各种过调算法的原理的基础上，提出了一种简单有效的算法满足过调控制的要求，在1.5kW异步电机上进行了实验并使用PZ4000功率分析仪对其结果进行了准确测量与分析，证明了本文提出的SVPWM算法可以有效地提高电源电压的利用率。

A security enhancement scheme is proposed to encounter the black hole attacks in aodv protocol . this scheme may solve the black hole problem and prevent personating the destination node to some degree .

针对移动adhoc网络aodv协议中所存在的黑洞攻击，提出了一种增强安全性的解决方案，该方案能在一定程度上解决黑洞问题并可防止假冒目的节点攻击。

This scheme combined the q-composite random key predistribution scheme and introduced the location information to enhance secure connection probability between nodes.

该方案结合q-composite随机密钥预分布模型，并且通过引入地理位置信息，有效提高了节点之间安全连通的概率。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。