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Some examples for key characteristics: all geometry related dimensions, function - relevant information (such as water tightness, performance, torque, noise), decorative properties, surface properties, shape and positional tolerances, information on heat treatment and material, information on tooting, threading, surface treatment information, information on welding, information on work piece edges, specifications relating to flammability/ combustibility of materials, heat resistance, impact resistance, flexural strength of materials, characteristics related to the process (pull/push/shear forces, starting power).
A simple definition of key characteristics is mentioned by Jack B.
Another definition of key characteristics is mentioned by Anna C.
Drăghici, Integrated Product Engineering (in Romanian), Eurobit Publishing House, Timișoara, 1999
Thornton, Key Characteristics to cut variation and manufacturing costs, focus on key characteristics, AME, 1996, pp. 14-19

Materials Science Forum Vols. *** (2004) pp.603-607 online at http://scientific.net  2004 Trans Tech Publications, Switzerland The Architecture of Reliability Information System for CNC Machine Tool in Concurrent Engineering Q.
Zhu 1,d 1 School of Mechanical Engineering, Shandong University, Jinan 250061 a zhangqiangd@163.com, bboyliu791@sohu.com, cdcy_425@163.com, d yaoming@ mail.sdu.edu.cn Keywords:::: Reliability, CNC machine tool, Information system, Concurrent engineering Abstract.
Whereas, by recomposing functional cells, we can analyze the reliability of CNC machine Materials Science Forum Vols. *** 605 tool productions from the part to the whole.
Jia: Mechanical Engineering Transaction Vol.7 (2001), p. 24 [3] G.W.
He: Reliability Engineering (Chinese Standard Press, China, 1997) [4] Y.X.

Typical Materials’ Abrasion Rules and Failure Lives Prediction of Key Parts for Breech Mechanism Based on Virtual Prototype HuiBin Hu1,2,a, LiJun Cao1,b, XinWen Cao2,c, ShuXiao Chen 2,d, Yan Sun 2,e 1Shijiazhuang Mechanical Engineering College, Shijiazhuang, Hebei Province, China 2Shijiazhuang Army Command College, Shijiazhuang, Hebei Province, China ahuhuibin_bin@163.com, bcaolijun_jun@163.com, ccaoxinwen@126.com, dchenshuxiao@163.com, esunyan@163.com Keywords: Abrasion Rule, Failure Life, Prediction, Breech Mechanism, Virtual Prototype, Abstract.
Key parts’ load spectrum can be obtained based on virtual prototype.
Pin-on-disc friction and abrasion testing machine is designed and adopted to obtain typical materials’ abrasion rules.
PcrMo is the most frequent material in breech mechanism.
A Framework for Semiqualitative Reasoning in Engineering Applications.

At present, the design of composite material compression performance mainly considers a large safety factor, and a compression failure assessment method that can meet the needs of reliable engineering applications is still a challenge and a key issue that the engineering community urgently needs to solve.
In order to better utilize the mechanical properties of composite materials, it is necessary to conduct compression performance research, providing a basic basis for engineering design.
The use of this model is relatively cumbersome and not convenient for practical engineering applications. 2.9.
Fiber microbuckling finite element (FMB FE) model The above analytical models are all aimed at a specific material system or specific failure mechanism, and are not universally applicable in engineering applications.
At present, the design of composite material compression performance mainly considers a large safety factor, and a compression failure assessment method that can meet the needs of reliable engineering applications is still a challenge and a key issue that the engineering community urgently needs to solve.

AISIO1 steel work-piece material is chosen and the material parameters are taken from[6],and the tool substrate material is M2 steel with TiN/Si3N4 coatings.
Calzavarini, Turning of metal matrix composites, Journal of Materials Processing Technology 119 (2001) 257–260
Bartoszuk, Finite element modeling of temperature distribution in the cutting zone in turning processes with differently coated tools, Journal of Materials Processing Technology 164–165 (2005) 1204–1211 [6] K.
Gao, Finite element simulation of the orthogonal metal cutting process for qualitative understanding of the effects of crater wear on the chip formation process, Journal of Materials Processing Technology 127(2002) 309-324
Manufacturing science and Engineering, MED-vol.10,ASME,New York,1999, pp. 301-307.

Study on Improving the In-Class Teaching Ability of Young Teachers in Science and Engineering Universities and Colleges Guiqing Hea Xiaoyi Fengb Northwestern Polytechnical University, Xi’an710072, China aguiqing_he@nwpu.edu.cn, bfengxiao@nwpu.edu.cn Key words: Science and engineering universities and colleges, young teachers, in-class teaching ability Abstract: With young teachers as the study object and with the aim to improve their in-class teaching ability, this paper conducts studies centering on the weaknesses of young teachers in science and engineering universities and colleges, i.e. their severe lack of teaching experiences and their mistaking scientific research capabilities for teaching ability.
Lecture notes are not just copied information of teaching materials.
Instead, they are extracted from teaching materials, but more flexible and applicable.
Therefore, a teacher cannot simply repeat what teaching materials say, improvise at liberty, speak generally without key points or cover all aspects.
l Gain new knowledge through reviewing learnt materials and put emphasis on coherence.

Study on the reconstruction and microscopic contact of engineering surfaces Qingli Wang a, Peilin Li b , Wei Wang c, Xiaowei Liu d College of Air and Missile Defense, Air Force Engineering University, Xi’an 710051, China w154106563@163.com,154106563@qq.com,1500519623@qq.com,792717351@qq.com Key words: Engineering surfaces; Bi-cubic B-spline; Contact area; ANSYS Abstract—Aiming at the existence problems of surface fitting on the current surface measurement method of digital characterization of engineering surfaces, the Pro/E software is used to envelope processing on measured data which is reduced noise and volume, and formed of small plane characteristics.
A finite elements contact model of engineering surface and the rigid plane is established.
Scholars have done a lot of works on reconstruction of engineering surface.
Computer Simulation of Rough Surfaces, Lubrication Engineering, (2006),182(10):52-55.
(In Chinese) [8] Xiaowei Li, Study of key technologies in reverse engineering, He Fei Poly-technic University,(2007).

The New Technology of Engineering Ceramic Machining by Electrode Micro-detonation X.L.
Yu 4 1 National Key Laboratory for Equipment Remanufacturing, Academy of Armored Forces Engineering, Beijing, China, 100072, tianxli719251@sohu.com 2 National Key Laboratory for Equipment Remanufacturing, Academy of Armored Forces Engineering, Beijing, China, 100072, yjf-beijing@163.com 3 National Key Laboratory for Equipment Remanufacturing, Academy of Armored Forces Engineering, Beijing, China, 100072, liuhacha@163.com 4 Faculty of Engineering, Ningbo University, Ningbo, China, 315211, yuaibing@126.com Keywords: Electrode micro-detonation machining, Engineering ceramic, Degenerative layer, Cracks, Performance and mechanism analysis Abstract.
The engineering ceramic material machining with low cost is realized successfully with the devices.
Mohri: Journal of Materials Processing Technology, vol. 149 (2004) p: 124-128 [3] X.P.
Lu: Journal of Materials Processing Technology, vol. 129 (2002), p: 152-156 [5] S.R.

In the paper, the green modular design method that oriented remanufacturing engineering is proposed.
The effective ways to achieve these goals are to select materials with better environmental performance, improve the utilization of parts and extend the life cycle of the equipment
Conclusion Green modular design methods that oriented remanufacturing engineering provides an effective design method for realizing the equipment remanufacturing engineering.
Science Technology and Engineering, No. 1(2001), p.24
Chinese Journal of Mechanical Engineering, No. 11(2003), p.1491

Project cost management is demanded increasingly in engineering project management, and cost forecast is a vital part that enterprise strengthen overall cost management and play an important role in engineering project management increasingly.
First of all, it is essential to analyze characteristics of cost forecast engineering project and determine the key factors which influence cost.
If there are too much variable key factors, they could be taken measures to translate variable key factors into immutable key factors so as to forecast.
Generally speaking, engineering project cost are consisted of site transportation fee, earthwork engineering fee, tower engineering fee, foundation engineering fee, accessory engineering fee and stringing Ding Cheng fee, these six kind of fee can be divided into two objectives forecasted.
So cost forecast of this engineering project is the collection of two objectives forecasted [2].