An Implicit Iteration Process with Errors for a Finite Family of r-strictly Asymptotically Pseudocontractive Mappings

In this paper,we will establish several strong convergence theorems for the approximation ofcommon fixed points of r-strictly asymptotically pseudocontractive mappings in uniformly convex Banachspaces using the modiied implicit iteration sequence with errors,and prove the necessary and sufficient conditionsfor the convergence of the sequence.Our results generalize,extend and improve the recent work,in thistopic.     

A Calculation Approach to Elastic Constants of Crystallines at High Pressure and Finite Temperature

Elastic constants of Na and Li metals are calculated successfully for temperatures up to 350K and pressures up to 30GPa using a scheme without involving any adjustable parameter.Elastic constants are assumed to depend only on an effective pair potential that is only determined by the average interatomic distance.Temperature has an effect on elastic constants by way of charging the equilibrium.The elastic constants can be obtained by fitting the relationship between total energy and strain tensor using the new set of lattice parameters obtained by calculating displacement of atoms at the finite temperature and at a fixed pressure.The relationship between the effective pair potential and the interatiomic distance is fitted by using a series of data of cohesive energy corresponding to lattice parameters.     

阵列幅相误差条件下的目标方位估计

本文研究了一种改进的MUSIC法，可在一定阵列幅相误差条件下对多目标实现高分辨方位估计，有效地改善了原算法的参数估计性能，具有稳健性高、适用范围广以及工程实现简单等特点，通过大量的计算机仿真和水池实验表明，该方法具有较好的多目标分辨能力和方位估计精度，工程应用前景良好。     

温度测量装置的控制方法

在现代工业生产中，温度测量装置的使用十分广泛。在许多场合如热处理、热加工、温度实验等都需要严格的控温条件，才能保证产品的质量。因此，对使用中的温度测量（或控制）装置必须进行控制，确保其可靠性。温度测量装置属于计量器具，应遵循我国《计量法》的规定定期周检，但是在实际工作中，情况往往比较复杂，需区别对待和处理。温度测量装置有许多种类，具体的控制方法大体有两类：1.送实验室周检；2.现场校准。周检法用于能运送到实验室的有适用检定规程的温度测量装置，如常用的XCT型动圈式温度指示调节仪（适用国家计量检定规程J…     

上海市电力需求的协整与误差修正分析

本文采用协整与误差修正模型技术研究了上海市电力需求的决定因素,建立了上海电力需求函数,检验了电力需求与国内生产总值、电力价格、经济结构、电力使用效率之间的长期均衡关系及短期波动关系。     

基于二次插值的非饱和土壤水流问题的特征差分方法及数值模拟

本文针对一类非饱和土壤水流问题,提出了基于二次插值的特征差分格式,得到了严谨的L2模误差估计.并作了数值试验,指明方法的有效性.     

Growth of NaBi（WO4）2 Dendrite and Mechanism

The solid-liquid interface motion of NaBi（WO4）2 （NBWO） melt crystal growth is observed in an in situ system, in which the whole processes of interface transition from fiat interface and cellular to dendrite are visualized. The spacing of the dendrite under smaller temperature gradient turns out to be larger than that under larger temperature gradient, which is found to be sensitive to the temperature distribution. The mechanism of dendrite growth of NBWO is studied based on the model of the growth units of anion coordination polyhedra. The { 001} face has two apex links, so it shows higher stability and has high growth rate and forms the arm of dendrite, whereas the {010} face has only one apex link, and thus shows relative slower growth rate and firstly forms the branches.     

新品推荐——软件工具类

BPM Helix自动烧录系统，KIC Explorer热温度曲线系统，LeadTracer—RoHS XRF系统，SMT3000LD自动去助焊剂系统     

活动标形及其在点啮合齿轮传动误差分析中的应用

活动标形法的论述首推苏步青译，佐佐木重夫著《微分几何学》，还有的著作从外微分形式引入活动标形,本文论证取曲面的正交曲率网为参数网时，曲面论的基本公式就是活动标形的微分形式，并用其分析了点啮合齿轮传动误差．     

高功率固体激光器光学元件位相误差滤波

不同频段的位相误差对输出光束将产生不同的影响，低频段主要影响远场焦斑主斑的能量分布，中高频段影响光的散射或者可能出现的较大的强度峰值调制，高频段影响光的散射，导致能量的损失。研究光学元件引入的位相误差与输出光束之间的定性、定量关系，首先必须对位相误差进行相应的滤波处理，反映光学元件面形的细微误差。