Pro/ENGINEER常见问题解答

本文主要针对Pro/E学习中常见、易混淆的问题,以问答的形式做了较详细的解答,旨在帮助大家更快地掌握软件的使用。     

Polychlorinated dibenzo-p-dioxins and dibenzofurans in flue gas emissions from municipal solid waste incinerators in China

Polychlorinated dibenzo-p-dioxins and furalls(PCDD/Fs)emissions in flue gas from two types of municipal solid waste incinerators(MSWIs)most commonly used in China were investigated in this study.The selected incinerators include two grate-type MSWIs:MSWl-A(350 t/d)and MSWI-B(150 t/d),and two fluidized bed MSWIs:MSWI-C(400 t/d) and MSWI-D (400 t/d),which are all equipped with semi-dry lime scrubber and bag filter except MSWI-D equipped with cyclone and wet scrubber(WS)as air pollutant conffol device(APCD).Results indicated that the emission concentration and the international toxic equivalents(I-TEQs)of the PCDD/Fs from the stacks were in the range of 1.210～10.273 ng/Nm3 and 0.019～0.201 ngI-TEQ/Nm3,respectively.They were greatly lower than the emission regulation standard of PCDD/FS in China(1.0 ng I-TEQ/Nm3).However,only the PCDD/Fs emission Ievel from MSWI-C Was below 0.1 ng I-TEQ/Nm3.Although the homologue profiles were distinct,the contributions of the 2,3,7,8-subsituted congenem to the total I-TEQ were similar among all the investigated MSWIs.Two major 2,3,7,8-substituted congeners,2,3,4,7,8-PeCDF and 1,2,3,7,8-PeCDD,account for 47% and 9%(average values)of the total I-TEQ values,respectively.The correlation between PCDD/Fs levels and composition of flue gas Was also discussed.     

基于Web的B／S模式网络管理信息系统的设计与实现

随着Internet/Intranet技术的发展,基于Web的企业计算和信息管理将逐步取代传统的PC计算机和信息管理系统。本文基于Web技术,在Internet/Intranet上为襄樊某设计院(以下简称设计院)设计与实现了管理信息系统,该系统以B／S模式实现数据信息的管理,具有简洁、高效、使用方便等特点,具有良好的可扩充性、可维护性。     

电器实验系统网络架构及其通信技术开发

为了克服传统电器实验室系统的不足,构建了基于真实实验设备的网络化电器实验系统.该实验系统分为客户端、服务器端和现场设备层3个部分,采用UDP自定义协议及MODBUS/RTU协议实现客户端与服务器、服务器与现场设备之间的通信.文章最后还介绍了温升实验在网络化实验平台中的应用.     

MEASUREMENT OF THE DIELECTRIC PROPERTIES OF BIOLOGICAL TISSUE

An open-ended coaxial line reflection method especially suitable for meas-uring the dielectric properties of biological tissue in vivo is described.This method offersthe advantage of not requiring any special preparation of the samples to be measured but aclose contact with the open end of a coaxial line.It is,therefore,very convenient to acquirea large number of measurement data in broad band rapidly.The method may also be usedto measure the properties of other substances.The measuring system consists of a networkanalyzer controlled by a microcomputer and calibrated by using ANA procedure to elimi-hate the influnce of error network introduced by the adapter,some connectors,etc.In or-der to reach higher accuracy,the iterative method is used to determine the parameters ofthe equivalent circuit.Measurements of permeativities of some living tissues have been per-formed in the frequency band of 0.5-2GHz.Compared with the results known in somepapers,the validity of this method has been confirmed.The difference in dielectric proper-ties between living and dead tissues,and the tissue permeativites(ε)versus frequency andduration of measurement after death have also been measured.     

Scholars committed to opportunities in psychological education: a training and mentoring program for future psychologists of color

ABSTRACT

Although strides towards inclusivity and racial equality have been made in graduate education, many barriers to graduate education remain for racial/ethnic minorities. In response, we created Scholars Committed to Opportunities in Psychological Education (SCOPE), a mentor-based program for racial/ethnic minority undergraduates. 63 racial/ethnic minority undergraduates completed the SCOPE curricula and pre- and post-program questionnaires regarding graduate school application knowledge, application confidence, stress, self-efficacy, and SCOPE program satisfaction. Mentors completed a training and questionnaires in one SCOPE cohort. Knowledge about the GRE, the application process, and application confidence increased, and stress decreased, following SCOPE. The result of this work is a portable mentoring program that can be used across disciplines and demographics to increase inclusivity and equality.     

Optimising the blended learning environment: the Arab Open University experience

This paper will offer some insights into possible ways to optimise the blended learning environment based on experience with this modality of teaching at Arab Open University/Jordan branch and also by reflecting upon the results of several meta-analytical studies, which have shown blended learning environments to be more effective than their face to face and online only counterparts. Three key elements will be presented as important ways for improving the blended learning environment: forging genuine collaborative partnerships between institutions in terms of the team-writing of Open and Distance Learning (ODL) material, adopting a more theoretically based instructional approach, such as the cognitive apprenticeship (CA) model, which emphasises making thinking visible and developing a comprehensive understanding of blended education in order to help students achieve their educational goals.     

Matters of Form: Questions of Race,Identity, Design,and the U.S. Census

This case examines how functionalist approaches manifest culturally based on users’ contexts. The authors conduct a critical visual semiotic analysis of the race and Hispanic origin questions on the 2010 U.S. Census form, demonstrating how incongruities in design potentially harm people. This demonstrates a need for adding critical analyses to design and research and it refocuses the Society for Technical Communication’s value of promoting the public good on to design and documentation in order to fight injustice.     

Education for transformation: an evaluative framework to guide student voice work in schools

In the context of neoliberal and neoconservative educational reforms, student voice work is faced with a number of potential difficulties in creating the conditions, skills and dispositions necessary for student empowerment. One of the key challenges is evaluating whether student voice initiatives are effective, relevant and transformative. Through a systematic literature review of contemporary student voice literature from the past 10 years, the article proposes an evaluative framework to measure the extent to which student voice contributes to socially transformative educational practices in primary and secondary schools This framework suggests that transformative voice work should be dialogic, intergenerational, collective and inclusive, and transgressive. It argues that the interaction of these four themes forms a set of principles or building blocks which collectively underpin transformative student voice work. The purpose of such an evaluative framework is not to provide a normative benchmarking tool, but rather, to serve as a reflective dialogical tool that could guide teachers and students towards genuine transformation of institutional structures and individual practices as well as informing policy makers, practitioners and researchers.