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Y311型条粗条干均匀度机的常见故障及其排除
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作者 袭建忠 《江苏计量测试》 1991年第2期31-32,共2页
关键词 故障 均匀度机 棉条 粗纱
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影响塔式烘干机系统技术性能测试结果的因素探讨
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作者 刘长生 赵学工 +3 位作者 高树成 曹毅 王德华 李尚 《粮食储藏》 2003年第3期53-54,共2页
关键词 塔式烘干系统 技术性能测试 玉米破碎率 系统处理量 粮食水分不均匀
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常规纺仪常见故障的调试与维修(连载十四)
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作者 王平 胡章兰 《安徽纺织》 1999年第2期35-35,共1页
关键词 调试 Y311 条干均匀度机 故障 维修
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常规纺仪常见故障的调试与维修(连载十三)
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作者 王平 胡章兰 《安徽纺织》 1999年第1期32-33,共2页
关键词 Y311 条干均匀度机 故障 维修
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Study on Various Rectifiers for Fan-Filter Units 被引量:3
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作者 刘俊杰 涂光备 马九贤 《Transactions of Tianjin University》 EI CAS 2002年第2期119-124,共6页
The face velocities of the high efficiency particulate air filters and the ultra low penetration airfilters in fan filter units (FFUs) have large relative standard deviation and turbulivity. It seriously affects the ... The face velocities of the high efficiency particulate air filters and the ultra low penetration airfilters in fan filter units (FFUs) have large relative standard deviation and turbulivity. It seriously affects the unidirectivity of the flow in the unidirectional flow clean zone and cleanroom. The cross contamination in this kind of unidirectional flow area is hardly controlled. It is significant to find optional method for keeping the face velocity uniformity of FFU and reducing the face velocity turbulivity of FFU, furthermore, to keep the cleanliness level under FFUs. The normal and easy method is to add flow rectifiers under filters. FFUs with various flow rectifiers have been tested. The uniformity and turbulivity of facevelocity under the FFU are presented in this paper. The influence of the facevelocity uniformity and turbulivity on the contamination boundary of the unidirectional flow is studiedas well. 展开更多
关键词 unidirectional flow air velocity UNIFORMITY turbulivity flow rectifier fan filter unit (FFU)
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Realization of finite precision chaotic systems via internal perturbation
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作者 李德志 Wang Zhenyong +1 位作者 Gu Xuemai Guo Qing 《High Technology Letters》 EI CAS 2013年第4期346-352,共7页
A method of controllable internal perturbation inside the chaotic map is proposed to solve the problem in chaotic systems caused by finite precision.A chaotic system can produce large amounts of initial-sensitive,non-... A method of controllable internal perturbation inside the chaotic map is proposed to solve the problem in chaotic systems caused by finite precision.A chaotic system can produce large amounts of initial-sensitive,non-cyclical pseudo-random sequences.However,the finite precision brings short period and odd points which obstruct application of chaos theory seriously in digital communication systems.Perturbation in chaotic systems is a possible efficient method for solving finite precision problems,but former researches are limited in uniform distribution maps.The proposed internal perturbation can work on both uniform and non-uniform distribution chaotic maps like Chebyshev map and Logistic map.By simulations,results show that the proposed internal perturbation extends sequence periods and eliminates the odd points,so as to improve chaotic performances of perturbed chaotic sequences. 展开更多
关键词 finite precision internal perturbation chaotic system
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