试论王树楠对新疆货币思想的贡献

本文试图从对历史文献的解读中，探讨王树楠对新疆货币思想的贡献，从而加深对新疆近代货币思想变迁的认识，继承和发扬新疆优秀历史文化遗产，为当前的经济建设作一有益的借鉴。     

大学英语分级教学现存问题的调查与分析

采用描述性统计和定量分析的方法，对大学英语分级教学中存在的问题进行了初步的探讨和分析，得到了一些有益的启示：①广大学生对分级教学是认可和支持的；②分级教学中确实存在一些不可回避的问题；③分级和动态管理使学生产生了强烈的心理反差；④分级教学的测试和管理还不能很好地与分级教学配套，使分级教学成果大打折扣；⑤分级教学还有待完善。     

Multi-objective aerodynamic optimization design of high-speed train head shape

To improve the aerodynamic performance of high-speed trains (HSTs) running in the open air, a multi-objective aerodynamic optimization design method for the head shape of a HST is proposed in this paper. A parametric model of the HST was established and seven design variables of the head shape were extracted. Sample points and their exact values of optimization objectives were obtained by an optimal Latin hypercube sampling (opt. LHS) plan and computational fluid dynamic (CFD) simulations, respectively. A Kriging surrogate model was constructed based on the sample points and their optimization objectives. Taking the total aerodynamic drag force and the aerodynamic lift force of the tail coach as the optimization objectives, the multi-objective aerodynamic optimization design was performed based on a non-dominated sorting genetic algorithm-II (NSGA-II) and the Kriging model. After optimization, a series of Pareto-optimal head shapes were obtained. An optimal head shape was selected from the Pareto-optimal head shapes, and the aerodynamic performance of the HST with the optimal head shape was compared with that of the original train in conditions with and without crosswinds. Compared with the original train, the total aerodynamic drag force is reduced by 2.61% and the lift force of the tail coach is reduced by 9.90% in conditions without crosswind. Moreover, the optimal train benefits from lower fluctuations in aerodynamic loads in crosswind conditions.     

可信计算软件栈的体系研究

近年来,随着互联网的信息安全问题逐渐得到注重,提高计算机的安全防护能力已经成为广大网络用户最关心的问题,而与之相关的可信计算的概念也不断升温,成为信息安全领域的热门话题。本文综述了可信计算的相关概念,包括可信计算平台的基础概念和体系结构。重点介绍了基于可信计算平台的软件栈,详细描述了它的基本原理、体系结构和应用研究。     

任弼时与中华苏维埃第一次全国代表大会的召开

中华苏维埃第一次全国代表大会的召开和中华苏维埃共和国临时政府的成立，是我党创建人民政权的一次伟大探索和实践，它不仅对中国革命产生了深远影响，而且对新中国政权建设提供了丰富的经验。当时筹备大会的主要负责人任弼时，为大会的准备做出了重大贡献。他统一思想认识，推举毛泽东主持工作，负责人事安排，起草件，指导选举。使大会得以顺利召开。     

洋务教育改革与明治维新教育改革之比较

本文对洋务教育与明治维新教育在改革的目的、改革的指导思想、改革所形成的体制三个方面进行比较研究，以探究中日两国改革结果不同的原因。这对我国当今教育改革具有借鉴意义。     

招生规模核定方法评析

本文对各主要规模核定方法逐一作了评述并分析其适用条件。研究发现,不存在公认完善的教育规划方法论,教育规划仍处于艺术的状态而没有成为精确科学。任何核定方法都是为一定的发展目标服务的,目标的确定及其轻重缓急的安排,反映了具体条件下招生规模对高等教育在社会经济发展过程中作用的期待。     

城市产业模式研究

现代化的大生产从一开始就拥有一种在不断的分工中进行自身繁殖、在空间和规模上不断自我扩张 的成长机制。产业内部不断分工,在城市发展中就表现为不同类型城市产业模式。本文从五个方面阐述了不同类型 产业模式的生成原因和面临的问题。     

A long-term experiment to investigate the relationships between high school students’ perceptions of mobile learning and peer interaction and higher-order thinking tendencies

In this study, a one-year program was conducted to investigate the relationships between students’ perceptions of mobile learning and their tendencies of peer interaction and higher-order thinking in issue-based mobile learning activities. To achieve the research objective, a survey consisting of eight scales, namely, usability, continuity, adaptive content, collaboration, communication, problem-solving, critical thinking and creativity, was developed. A total of 658 students from 38 high schools in Taiwan filled in the questionnaire after experiencing issue-based mobile learning activities. From the exploratory and confirmatory factor analyses, it was found that the questionnaire had high reliability and validity. The structural equation model further revealed that the provision of adaptive content in the mobile learning had positive impacts on the students’ tendency to interact with peers (i.e., collaboration and communication), which further affected their tendency to engage in higher-order thinking (i.e., problem-solving, critical thinking, and creativity). The findings of this study provide a good reference for researchers and school teachers who intend to promote mobile learning in school settings.     

线性网络幅频特性的自动测量

介绍了利用精密二极管检波测量线性阻抗网络幅频特性的方法以及由计算机数据采集系统组成的自动测量装置，数据测量结果分析表明，该方法的测量误差在3％以内。完全可代替常规的交流测量法，该方法配合高稳定性、快速跟踪的压控振荡器VCO可实现宽频范围内的快速扫频自动测量。