3.By reviewing the cases of environment impactvalue of urban rail transit in China in recent years, and based on the analysis and summary of environment impactvalue (EIV) results and practical effects, some problems in environment impactvalue (EIV) are discussed comprehensively, among which arc the choice of environment protection targets, the accuracy of source strength analogy, forecasting methods of noise and vibration and the principles of control measure.
4.434 we shall take the sample to test its physical properties (mechanical properties, tensile strength, yield point, percentage elongation, reduction of area, impactvalue, brinell hardness).
5.The C v method of DWTT, parameter method of M= C v 1/2 / YS and Leis amendment method can rectify this bias in some degree to less tolerance between prediction and measurement through the analysis of several fracture control parameter such as sharply impactvalue,COD, DWTT test and measurement of anti crack toughness. This makes the prediction value approach to actual measured value, and improves the accuracy of pipeline anti crack prediction sharply.
6.The experimental results indicated that combined application effect of Cu, Cr, B, Mo and Sb was the best and M?A duplex ductile iron with high toughness and hardness could be achieved, which had impactvalue above 30J/cm?2 and Rockwell hardness number above HRC53.?
7.At the same time,the steel remaines high plasticity and toughness,and its percentage elongation δ and impact toughness value α k exceed 10%～12%,and 40～45kJ/m+2,respectively. The fracture mode changes from quasi|cleavage to quasi|cleavge and dimple.
10.Wu, Melien (2000), “The Impact of Work Value, Professional and Affective Commitment on the Organizational Citizenship Behavior”, the 27th Western Decision Sciences Institute 2002 Annual Meeting , Maui, Hawaii, U.S.A.
