基于Pro/E和ADAMS联合仿真的夹钳机构设计与优化

在Pro/E环境下对初步设计的夹钳机构进行建模、装配及运动学仿真分析,发现模型运动学特性较差.为改善夹钳机构的运动学特性,将模型通过Mechanism/Pro接口程序导入ADAMS中进行优化设计,并在ADAMS中得到了改进机构模型的方法.在Pro/E下改进机构模型并再次进行运动学仿真,验证了改进结果的合理性.仿真结果表明,利用Pro/E和ADAMS联合仿真的方法可以为机械结构的优化设计提供一条有效路径.     

Pro/E在塑料注射模设计中的应用

阐述了Pro/E三维设计软件在塑料注射模设计过程中的重要作用，以及在塑料注射模设计中常用设计方法的介绍。     

PVC管固定座注塑模设计

分析了PVC管固定座塑件的工艺特点，介绍了模具的主要设计过程、重要参数的选取。针对塑件外形复杂、总体尺寸适中，且有较深不等径侧孔的情况，设计中采用一模四腔、对称布置，水平抽芯机构采用斜销结构。在该设计中运用了PRO／E进行实体造型和模具设计。     

Ab-initio calculation of enthalpies of formation of intermetallic compounds and enthalpies of mixing of solid solutions

A large number of ab-initio calculations of energies of formation of intermetallic compounds have been performed in the last 15 years. The currently used methods are listed. The paper presents a review of the aluminium based compounds which have been studied. Comparisons of calculated and experimental enthalpies of formation are provided for aluminim-3d and-4d transition metal alloys at equiatomic composition. The modelling of the enthalpies of mixing of solid solutions based on a given lattice is described.     

Thermodynamic analysis and assessment of the Ce–Ni system

An optimised set of thermodynamic parameters for the Ce–Ni system has been obtained using the CALPHAD approach. A thorough thermodynamic analysis of the system has been carried out using different calorimetric techniques and the data have been used in the assessment. The free energy of the liquid phase has been described as a function of temperature and composition using a Redlich–Kister polynomial. Solid compounds have been considered as stoichiometric with the exception of the Laves phases. The phase diagram and thermodynamic quantities calculated from assessed parameters agree well with experimental data.     

基于Pro/E的水压轴向柱塞泵三维造型设计及机构仿真

在分析水压轴向柱塞泵结构特点的基础上，详细说明了Pro／E在柱塞泵三维造型设计和机构仿真制作的全过程，从而为水压泵的设计提供了有力的工具。     

齿轮三维智能化设计研究

针对齿轮结构复杂、造型困难、使用频繁的特点,研究基于Pro/E平台的渐开线齿轮三维参数化造型技术;运用Pro/TOOLKIT、VC 对Pro/E软件进行二次开发,可根据用户输入的齿轮设计参数,自动生成齿轮的三维实体.     

硫酸盐还原菌对A3钢电化学腐蚀行为的影响

采用交流阻抗技术和动电位扫描法测Tafel曲线技术 对A3钢在含不同浓度硫酸盐还原菌介质中且未除氧条件下的电化学特性进行了研究，并采用SEM观察试样表面的腐蚀状况.结果表明：硫酸盐还原茵可以促进A3钢的阴极去极化和阳极极化，Ecorr降低；不同菌液浓度中的A3钢的交流阻抗谱图均呈单容抗弧特征，极化电阻Rp随菌液浓度增大而增大. SRB对腐蚀的影响作用与生成的生物膜的致密程 度有关.     

一种多维度的O2O电子商务声誉计算模型

移动通信技术与可信支付技术的成熟,使得近年来O2O商务飞速发展。声誉管理是交易双方建立信任关系的坚实基础,但目前针对O2O商务特点的声誉研究却几近于无,已有的P2P、B2C、C2C商务的声誉研究又无法反映O2O商务模式的特点,不适用于O2O商家的声誉计算。针对这些问题,提出了一种新的O2O商家声誉计算模型ESRep。模型根据O2O本地服务业的特点进行多维度思考,对商家的运营时间、客流量等因素进行分析,同时也考虑客户的评价、交易价格偏离度、交易双方空间距离等因素,充分体现了O2O商务线上和线下的特点。仿真结果表明,模型能够有效反映O2O商家的真实声誉,降低恶意节点的评价作用,遏制节点的声誉共谋行为。对比实验表明该模型具有良好的性能和精度。     

Is It Possible to Retain Customer Loyalty When a Service Has Failed?

This article aims to analyze the impact of recovery on loyalty in the context of a service chain characterized by the e‐quality–perceived value–loyalty relationship. A sample of 91 out of 1,201 respondents claimed to have had service problems with an online travel agency website. A causal model to test relationships was performed using structural equations modeling, and it was found that data fit with the proposed model. The really important point to retaining customers is quality. It is not so clear that the recovery effort might affect loyalty. Our findings underpin some previous stream of literature confirming that recovery does not always affect loyalty. Although the literature has not reached a consensus in this topic, we add new elements in this debate.