The Fundamentals of Engineering: The Art of Engineering

This sequence of courses is a major component of Drexel's E⁴ experimental program which spans the freshman and sophomore years. It is based on the premise that there exists a central body of knowledge, methods and attitudes which constitute the “Art” of Engineering. Further, exposing students to this art at the very beginning of their education is an excellent way to introduce them to the profession. The subject matter emphasizes design as the critical professional essence, interdisciplinary and common fundamentals, the pivotal roles of the computer and experimentation, and the imperative for superior communications skills. The methodology is experiential, consisting of several practicums, experiments and projects. The achievement and growth of participating students has been impressive. Evaluations indicate that the program also generates considerable interest and enthusiasm among the students and a sense of pride in their accomplishments. It appears that most students begin to understand what it means to be an engineer and many begin to enjoy the practice of the profession.     

能量配点法及其应用

能量配点法是作者1979—1980年提出来的,现在又有许多新的进展,本文主要介绍能量配点法的基本原理及其应用。能量配点法是以变分原理及数值积分法中的求积公式为基础的,根据变分原理及数值积分法中的求积公式(例如,辛普生求积公式,高斯求积公式),作者建立了能量配点法的统一计算格式。这个方法容易在电子计算机上实现,不仅计算简便,而且精确度比较高,能满足工程上的精确度要求。     

纳米结构电磁工程微观原理研究

本文分析了金属／电介质纳米多层膜的电磁响应和能量转换的物理原理,提出了基本理论框架,讨论了电磁响应的前提条件,透射效应、电磁响应模式、等离子模型、响应模式效率和本构特性的尺寸效应。实验结果表明,超薄Ａｌ、Ｔｉ、Ｆｅ膜在纳米范围内,随厚度变化,电导率、光学常数、介电常数、磁导率、载流子浓度和等离子体共振均存在尺寸效应。本文还讨论了纳米结构设计的基本原理。     

From Engineering Science to Precision Engineering and Ultraprecision Production:Fundamentals,Methodologies and Application Case Studies

正Submission Deadline:May 1,2021 The demand for precision components is on the rise in a variety of engineering industries.Over the last 10years,ultraprecision manufacturing technology has been applied on an industrial scale to ultraprecision production of products such as mobile phones,security monitor systems,head-up displays (HUD) and varifocal lenses,etc.     

三维可视化技术在岩土工程中的应用研究

由于三维可视化技术是将空间数据信息转换成三维图形,对大量数据处理具有高效性和直观性,该技术在岩土工程领域中已经得到了广泛的应用。主要介绍可视化技术在岩体的三维建模、三维数值模拟分析及岩体结构的三维网络模拟研究中应用。从而证明了可视化技术在岩土工程中的应用研究中具有十分重要的意义。     

中央空调冷水机组运行管理中的节能

冷水机组的操作人员往往因大量的误操作而偏离机组的运行参数 ,恶化机组的运行条件 ,人为的增加了机组的运行费用 ,因此要做好节能 ,必须纠正各种误操作。其它方法还有管理中的八项措施。只要时时正确地操作和贯彻好这些措施 ,就能达到节能、降低运行费用 ,提高经济效益的目的。     

基于脉冲液流换能器的振动能量回收原理与实验研究

针对自供电磁流变阻尼调节系统的能量供给问题,提出基于脉冲液流换能器的振动能量回收方法,通过振动能-液流能-机械能-电能的变换,实现振动能量回收。建立了基于齿轮马达、飞轮和永磁发动机的脉冲液流换能器分析模型,利用Matlab软件对正弦振动下换能器的电压输出特性、功率转换特性和转换效率进行仿真。为验证理论分析的正确性,设计制作了基于脉冲液流换能器的振动能量回收装置,利用J95-I减振器测试台上对振动能量回收装置实验测试,比较了正弦激励条件下换能器的理论电压特性与实测电压特性、理论转换效率与实验转换效率。实验研究表明,脉冲液流换能器是能够实现振动能量的转换,在带30 负载情况下,效率可以达到 46.85%,平均输出功率可以达到37.4W。     

Synergetic Management Theory for Coal-Based Energy Engineering and the Engineering Practice of Shenhua

To deal with problems in synergetic development of coal-based energy engineering, this paper, guided by the philosophy of engineering, proposes the synergetic management philosophy of “factors coordination, systems synergy, dynamic optimization and three-dimension planning.” The paper also establishes the synergetic management system characterized by systems factor synergy, resource-environment synergy and systems boundary extension and supported by the “two-wheel driven” management innovation and technological innovation. In addition, the paper presents a multi-objective dynamic optimization model for energy engineering, designed based on Shenhua’s own engineering practice, to analyze Pareto optimal solution in three scenarios: best resource allocation, minimal environmental impact and maximal value creation. This provides important reference to synergetic development strategies and decision-making in engineering management.     

节能型移动通信基站室内气流的数值模拟

基站节能系统可有效地降低基站运营成本。通过运用CFD（计算流体动力学）方法对一运用机械通风来散热的节能型移动机站的室内气流进行了数值模拟,分析了多个断面上速度矢量和温度等值线的分布。模拟结果与实际物理过程的基本一致,表明CFD方法完全可以作为室内气流组织设计的一种技术手段,从而大大缩短机房的设计周期以及节省试验费用。     

减少纺织厂空调能耗的工程实践

从车间冷负荷计算、温湿度标准确定等方面介绍了减少空调能耗的系统设计,对喷淋室、挡水板等设备进行了改造,分析了管式间接蒸发冷却器使用效果;采用智能调节实现自动控制,合理选择冷水机组使用台数,达到了节能目的。