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begin to decrease, which indicates that AE quiet period can be seen as precursor characteristic of rock failure. Key words: rock damage mechanism; pillar specimen; failure characteristics; temporal-spatial evolution; microracks; acoustic emission; location algorithm; quiet period 1 Introduction Rock is a typical inhomogeneous and anisotropic material, and contains several natural defects with various......
Null 包大杰1 (1.上海柴油机厂,上海,200432) 摘要: 问:何谓钢铁中全碳量(总碳量)和游离碳?答:碳在钢,铁中主要以化合状态和游离状态存在.在钢中主要以铁的碳化物如:Fe3C,Fe23C6等以及与某些合金元素的碳化物如:Mn3C,WC,TiC,MoC,VC,Cr3C2,Cr6C2等形式存在,统称为化合碳,钢中很少有游离碳.在铁中碳除以化合碳存在外,还以游离状态(石墨碳)存在,而且是主要形式.但是在白口铁中则多以碳化铁(Fe3C)形式存在. [全文内容正在添加中] ......
J. Cent. South Univ. (2016) 23: 2935-2940 DOI: 10.1007/s11771-016-3357-9 Nonlinear chaotic characteristic in leaching process and prediction of leaching cycle period LIU Chao(刘超), WU Ai-xiang(吴爱祥... demonstrated. According to the laws, a prediction model of leaching cycle period has been established to provide a theoretical foundation for solution mining. Key words: leaching system; phase space......
Replenishment policy and inventory optimization for supply-hub with liability period considerationLI Guo(李果) 1, HUANG Kun(黄焜)2, YAO Qi(姚琦)3, MA Shi-hua(马士华)2(1. School of Management and Economics.... The result shows that liability period decides the share of the inventory cost between two sides in supply chain. With the increase of liability period, the service level has been quickly reduced even......
Phenomena in late period of seeded precipitation of sodium aluminate solution LI Xiao-bin(李小斌), FENG Gang-tao(冯港涛), ZHOU Qiu-sheng(周秋生), PENG Zhi-hong(彭志宏), LIU Gui-hua(刘桂华) School... ratio(αk>2.4), corresponding to the late period of seeded precipitation, the influence of different types of seed on precipitation ratio was explained with respect to solution structure......
Optimal allocation of random access period for wireless body area networkJin hyuk KIM, Chang ki HONG, Sang bang CHOI(Department of Electronic Engineering, Inha University, Incheon 402-751, Korea.... In this work, we analyze the efficiency of simple slotted ALOHA scheme, and then propose a novel allocation scheme that controls the random access period and packet transmission probability to optimize......
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Numerical Analysis of Fiber Bragg Grating and Long Period Fiber Grating Undergoing Linear and Quadratic Temperature Change袁银权Key Laboratory of Fiber Optic Sensing Technology and Information Processing (Ministry of Education),Wuhan University of Technology摘 要:The coupled-mode equations for fiber Bragg grating (FBG) and long period fiber grating (LPFG......
Scientific Investigation on Bronze Swords from Spring-Autumn and Warring States Period何堂坤摘 要:<正> 1. Introduction The bronze swords were somewhat important in ancient China. Its alloy constituent analysishas been carried out by some scientist with modern technique. Afterwards, a series of work havebeen published. The main results are: (1) the sword......
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