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本文对影响WCDMA接续时长相关参数及信令流程进行详细分析,并通过具体不同参数的设置及现场测试验证,分析其对呼叫建立时长的影响,根据测试结果给出最优的参数值。 相似文献
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In this paper, the components of a high-speed cutting system are analyzed firstly. The component variables of the high-speed
cutting system are classified into four types: uncontrolled variables, process variables, control variables, and output variables.
The relationships and interactions of these variables are discussed. Then, by analyzing and comparing intelligent reasoning
methods frequently used, the hybrid reasoning is employed to build the high-speed cutting database system. Then, the data
structures of high-speed cutting case base and databases are determined. Finally, the component parts and working process
of the high-speed cutting database system on the basis of hybrid reasoning are presented.
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Translated from Computer Integrated Manufacturing Systems, 2006, 12(3): 420–427 [译自: 计算机集成制造系统] 相似文献
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Fulin Jiang Zhanqiang Liu Yi Wan Zhenyu Shi 《Journal of Materials Processing Technology》2013,213(6):887-894
Cutting temperature is a key factor which directly affects tool wear, workpiece integrity, and machining precision in high speed machining process. The interrupted cutting process consists of several periodical characteristics, such as cutting force and time varying heat source. Induced cutting temperature models with time varying heat flux are developed in this paper to predict temperature distribution at tool inserts and workpiece during interrupted cutting process. A set of interrupted cutting experimental installation is designed to verify the proposed models. The comparison of predicted and measured results for 1045 steel in interrupted cutting processes shows reasonable agreement. The measured temperature of both the tool inserts and workpiece increase firstly and then decrease as the cutting speed increases. The peak temperature of the workpiece appears at 1500 m/min, while the peak tool inserts temperature appears at 1250 m/min approximately. Heat flux is calculated by the inverse heat conduction method. The applicability of Salomon's hypothesis to the temperature of tool inserts and workpiece is discussed during the interrupted cutting process. The dropped temperature at high cutting speed is mainly caused by that heat flux into tool inserts decreases and heat transfer time is not enough after the critical cutting speed. 相似文献
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通过建立高速铣削试验台获取高速铣削声音信号,并对数据进行分析,发现切削过程声音信号的幅频域特性与其稳定性有着紧密的联系.该试验为利用声音信号判断切削颤振提供了事实依据,并为切削颤振控制打下了试验基础. 相似文献