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Parameters Optimization on the Lapping Process of 9Cr18 with Taguchi Method Xiaofeng Zheng1,a, Julong Yuan1,b , Donghui Wen1,c and Feiyan Lou1,d 1 The MOE Key Laboratory of Mechanical Manufacture and Automation, Zhejiang University of Technology, Hangzhou, China, 310032 a shawfun@126.com; bjlyuan@zjut.edu.cn; cwdh_74@163.com; dloufeiyan2002@163.com Keywords: Optimum design, Taguchi method, 9Cr18, Lapping Abstract. 9Cr18 is a type of martensite stainless steel.
Finally, the optimum condition of each factor can be determined that speed: 80rpm, load:3.0kPa, and time distribution: rough lapping time=15min, Ultra-precision lapping time＝45min are the optimum conditions for both Ra and Wt.
In additional, since the lapping process was divided into two steps in the experiment, the time distribution of two steps affected result seriously.
The paper also involved in the vital factor.
Variance of each parameter is: Vk= SSk/Fk, Fk is freedom of parameters , freedom of this reseach is: Fk=3-1=2.The variance of unknown factor (D column inTable 3) is: Ve=SSe/Fe, Fe = 3-1 = 2.

It makes the energy consumption and affects the precision of product.
Lee et al. [3] used the upper bound method to establish an admissible velocity field to explore the flow stress and frictional factor in the ring and cylinder compression process.
The ring compression test can predict the flow stress and frictional factor.
The geometric profile of cylinder is conducted by 3D model, the elastic-plastic model is chosen and the material properties, such as Young’s modulus, Poisson’s ratio, density, were needed.
Chen, Master Thesis, “Stress Analysis of Non-uniform Cylindrical Compression Test,” Department of Mechanical Engineering at National Taiwan University, 1996

Main factors may influence the results of the waterproof system of an underground structure.
Properties of spray-on membrane.
At present, the technical properties and practical experience available are mainly from the tests on Masterseal 340F and 345.
The results from tests results and practical case histories show that the roughness of the first sprayed concrete layer has no direct influence on the mechanical properties of the sprayed waterproofing membrane, such as bond strength of the sprayed concrete.
In the case of relatively permeable linings, the main factors that affect loads on tunnel linings due to water flow are relative wall rocks-lining stiffness, relative wall rocks-lining permeability, and geometric factors [6].

The detail lists of factors taken into consideration were shown in Table 1.
Materials properties.
The properties of the steel reinforcements and CFRP tendons were shown in Table 2.
The mechanical properties of reinforcements Reinforcement Diameter [mm] Area [mm2] Ultimate strength [MPa] Yield strength [MPa] CFRP tendon 8 50 1730 / Steel tendon 16 201 575 368 12 113 491 340 8 50 473 331 Prestressing procedure.
From the figures in Table 3 can be seen that the prestressing ratio was an important factor to affect the ductility of CFRP prestressed concrete beam.

Evaluation for soft soil foundation treatment technology of port engineering involves many factors which include qualitative factors and quantitative factors.
Zhu Qikun and Zhang Xiaomin [1] gave influence degree and evaluation results of factors affecting soft soil foundation treatment schemes through expert investigation methods and engineering analogy methods.
Advantages of this evaluation method can combine qualitative factors and quantitative factors, so as to quantitatively analyze some qualitative decision issues.
P is indicator weight allocation matrix of m factors.
In addition, the maximum thickness of mucky soil is about 13m, with relatively large thickness and poor physical and mechanical property, so soft soil foundation treatment must be conducted on this project.

Properties of the binder matrix affect the quality of the refractory.
For the most type of refractories, structural properties depend on the properties of binder matrix.
Discussion of the Test Results Samples, which were prepared from KA type binder, showed better mechanical properties than samples from QA type binder, higher compressive strength, cold bending strength and hot modulus of rupture.
For the Q/A samples, appareant porosity is found to be an important factor for the determination of creep properties.
It was found that; ZrSiO4 addition in the binder mixture improves the densification behaviour, mechanical properties and reduces the high temperature creep rate at 1500 °C and reduces the slag infiltration depth.

In addition, the mechanical properties of the matrix were investigated, in order to deepen the understanding of the complex interaction between the sample preparation and the resulting mechanical properties of the composite material.
Introduction For the first wall of a fusion reactor unique challenges are present requiring advanced materials in areas ranging from mechanical strength to thermal properties.
Mechanical Properties of Wf/W.
Discussion Matrix Properties.
One of those parameters is the fiber volume fraction of the material which has a major influence on the resulting mechanical properties of the composite.

A Clustering Method Based on Attribute Reduction and SOM Zheng Yongqian, Yu Shengnan and Jiang Peiming School of Mechanical Engineering, Tongji University, Shanghai, China e-mail: yongqian@tongji.edu.cn Key words: Attributes reduction; Difference Matrix; Clustering Analysis; SOM Neural Network; Customer Classifying.
Input data usually is redundant and redundant data would affect the clustering’s quality and thence redundant information should be eliminated.
Therefore we use attribute reduction rules to reduce the 18 properties, only take key attributes as SOM clustering model’s input.
Customer retention is one of the key factors to sustain business growth.
Top factors affecting clustering were identified through the modeling process.

Therefore this paper emphatically introduced the bond-slip properties of steel bar and recycled concrete, in order to use the little get the big.
In this experiment, the mechanical properties of steel bar are in Tab.1, and the mix proportions of recycled aggregate concrete are in Tab.2.
Different types of concrete, mixture ratio and the aggregate nature are the main factors affect the bond strength.
In order to enable recycled concrete structure to apply to practical engineering, it is necessary to research bond properties under dynamic load.
Overall, recycled concrete bond-slip properties of ascending little difference with the ordinary concrete, there is no qualitative change.

This technology development transforms the influencing factors of the pouring and solidification process into the calculation factors in the simulation [3].
Another four liquid islands form at the outboard of the spindle nose, and the potential shrinkage (as shown in Fig.1 is harmful to the mechanical properties.
Two ingates, 220×100×30.5 mm, were added to the middle of the runner, which could feed the middle of casting and eliminate the heat-affected defects.