Effects of slag fineness on durability of mortars

In recent years, the usages of by-products and wastes in industry have become more important. The importance of the sustainable development is also of increasing. The utilizations of wastes, as mineral admixture or fine aggregate, reduce the consumption of the natural resources and improve the durability of concrete. In this study, the effect of the fineness on the high temperature and sulphate resistances of concrete mortar specimens, produced with ground granulated blast-furnace slag (GBFS) replacing cement, is investigated. The compressive and flexural strength test results for all series related to durability effects, exposing temperature and solutions, exposure times for these durability effects, slag content and fineness are discussed. Conse- quently, the optimum slag contents are determined for producing the sulphate and high temperature resistant mortars.     

Stress analysis of anisotropic thick laminates in cylindrical bending using a semi-analytical approach

Semi-analytical elasticity solutions for bending of angle-ply laminates in cylindrical bending are presented using the state-space-based differential quadrature method (SSDQM). Partial differential state equation is derived from the basic equations of elasticity based on the state space concept. Then, the differential quadrature (DQ) technique is introduced to discretize the longitu- dinal domain of the plate so that a series of ordinary differential state equations are obtained at the discrete points. Meanwhile, the edge constrained conditions are handled directly using the stress and displacement components without the Saint-Venant principle. The thickness domain is solved analytically based on the state space formalism along with the continuity conditions at interfaces. The present method is validated by comparing the results to the exact solutions of Pagano’s problem. Numerical results for fully clamped thick laminates are presented, and the influences of ply angle on stress distributions are discussed.     

Research on the operating characteristics of parallel 4-DOF electric platform with 4TPS-PS structure

The 4TPS-PS parallel platform designed for a stabilization and automatic tracking system is a novel lower-mobility parallel mechanism. In the first part of this paper, the structure of the platform is described and the kinematics model is built. The workspace of the platform is defined as the full reachable rotation workspace when the Z coordinate dimension of the upper plate varies continuously. A fast searching method of the full reachable workspace is presented, after which the inverse kinematics of the platform is deduced. The forward and inverse solutions of the speed and force of the platform are deduced. According to the characteristic of the 4TPS-PS platform’s structure, a fast searching algorithm of the maximum generalized speed and maximum generalized force output by the upper plate is put forward based on the forward and inverse solutions of the platform’s speed and force. The 4TPS-PS platform prototype built by the State Key Laboratory of Fluid Power Transmission and Control of China is taken as the research subject. The full reachable rotation workspace of the prototype is computed out and analyzed. The curves of maximum generalized speed and maximum generalized force of the prototype are computed out and plotted. Finally, the com- puting and analyzing results of the operating characteristics are confirmed through the experiment.     

中国远程教育评估方法的演进

中国远程教育评估随着远程教育发展而发展,同时远程教育评估也推动远程教育的发展.回顾远程教育评估方法包括评估的类型、指标、权重和目标的演进及意义;展望中国远程教育评估发展趋势,将向终身教育观、评估机构、成本效益、长效机制等方面发展.     

谈审计执法与处罚力度的强化

我国审计制度还处在不断完善的过程中,审计执法还存在不少问题,需要不断改进和加强。从贯彻依法治国的基本方略,规范经济秩序,促进国民经济健康发展,加强对权力制约的监督,促进廉政建设等方面阐述强化审计执法与处罚力度的重要性。分析了审计执法与处罚力度弱化的原因。对如何强化审计执法与处罚力度提出方案探讨。     

Influences affecting the soil-water characteristic curve

INTRODUCTION The soil-water characteristic curve (SWCC) gives the relationship between the amount of water in the soil (i.e. gravimetric or volumetric water content) and soil suction (i.e. matric suction at low suction and total suction at high suction). Many properties of a partially saturated soil such as the coefficient of permeability, shear strength and volume strain, pore size distribution, the amount of water contained in the pores at any suction, can be obtained from the SWCC. …     

仓储式商场管理信息系统及电子商城系统的设计

本文在研究了国内大量仓储式商场的经营管理模式和仓储式商场计算机信息管理现状的基础上，提出了仓储式商场计算机管理的信息系统模型。该模型不但解决了仓储式商场日常内部管理如柜台收费、库存商品管理、商品采购等一系列的问题，同时也提出了仓储式商场电子商务B—C模型，对提高企业管理水平和企业在消费者心目中的地位有一定的意义。     

学校与社区互动要素探究——基于四川藏区学校与社区互动的考察分析

学校与社区互动的核心是以语言及其负载的众多文化因素作为活动的主要中介工具.学校与社区语言文化的共享性越多,两者之教育目标越趋向一致,学校与社区的凝聚力就越强,学校工作就会事半功倍.建立学校与社区的和谐互动关系需要确认和尊重文化的丰富性和多元性,这是提升藏区教育整体发展之关键.     

A Diagnostic-Remediation Teaching System for Enhancing Elementary Students’ Science Listening Comprehension

The purpose of this study was to explore elementary students’ listening comprehension changes using a Web-based teaching system that can diagnose and remediate students’ science listening comprehension problems during scientific inquiry. The 3-component system consisted of a 9-item science listening comprehension test, a 37-item diagnostic test, and 107 scaffoldings of listening strategies. The diagnostic and remediation system was trialed with grade 6 students (N?= 526) from southern Taiwan who were selected by cluster sampling. The participants were asked to take the 3 components individually on a computer. The students’ responses were collected and analyzed to document performance and changes. Results indicated that the diagnostic test had a positive influence on science listening comprehension proficiency and addressed potential problems, while the scaffolding helped remediate confirmed listening difficulties. Instructional implications for classroom diagnosis–remediation applications are discussed and future research is outlined.     

Localized Representation of Formative Assessment in China: A Regional Study from a Sociocultural Perspective

Formative assessment originated and developed in a Western context. With its function of learning improvement being evidenced in research, formative assessment has been adopted in assessment initiatives in multiple contexts including that of China. Research, however, reveals that formative assessment as implemented in Chinese contexts is by no means equivalent to what is understood and implemented in the West; rather, in many cases, it is decontextualised and recontextualised, or culturally appropriated. This paper presents findings of a study which examined the culturally appropriated representation of formative assessment within eight universities in a mid-western province of China. Senior administrators in each university were interviewed face-to-face and individually to fulfill three purposes: (1) To clarify understandings of formative assessment in the area of college English education; (2) To explore the existing gap between formative assessment principles and their representation in College English Curriculum Requirements (CECR), and the gap between formative assessment initiatives at the national level and local contexts; and (3) To distill implications for policy-borrowing and effective implementation in the Chinese context.