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用齐夫定律解读教材词表——评Xiao et al. (2017)《基于语料库的小学英语认识率及教材选词策略研究》 Correspondence

Qiong HU, Ming YUE

《信息与电子工程前沿（英文）》 2017年第18卷第7期页码 863-866 doi: 10.1631/FITEE.1700418

摘要：在解读词频时需重视齐夫定律（Zipf’s law，即英语词频与词秩成反比）的作用——识字率增长随词汇量增加而减缓的情况是合理的；3.

关键词：齐夫定律（Zipf’s law）；语料库；英语；教科书；词表

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分形方法导出改进的牛顿第二定律及万有引力定律

付昱华

《中国工程科学》 2003年第5卷第6期页码 55-58

摘要：

牛顿第二定律及万有引力定律是根据实验结果总结出来的。为了探讨从理论上导出这两个定律的可能性，根据能量守恒定律，给出用变维分形方法针对一个实例（小球沿长斜面滚下）导出改进的牛顿第二定律及万有引力定律的方法。具体给出了适用于实例的常维分形结果：改进的万有引力定律F=-GMm / r^1.99989和改进的牛顿第二定律F=ma^1.01458。

关键词：分形方法牛顿第二定律万有引力定律理论推导

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摩尔定律发展亟需450 mm 硅片但时间可能会推迟

屠海令

《工程（英文）》 2015年第1卷第2期页码 162-163 doi: 10.15302/J-ENG-2015060

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China’s Ministry of Environmental Protection Adopted Draft Amendment to the Law on Prevention and Control

Fu Sun,Yi Liu

《环境科学与工程前沿（英文）》 2016年第10卷第6期 doi: 10.1007/s11783-016-0890-6

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纳米级芯片有望拯救摩尔定律

Robert Pollie

《工程（英文）》 2021年第7卷第12期页码 1655-1656 doi: 10.1016/j.eng.2021.11.008

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高效节能计算的跨层设计：为实现每瓦特电力每秒千万亿次运算 Perspectives

Xiaobo Sharon HU, Michael NIEMIER

《信息与电子工程前沿（英文）》 2018年第19卷第10期页码 1209-1223 doi: 10.1631/FITEE.1800466

摘要：由于基于摩尔定律的器件缩小及其性能增长趋势正在放缓，实现快速和高效节能信息处理的新技术和计算模型越来越被关注。

关键词：摩尔定律；高效节能技术；神经网络加速器；超CMOS器件

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基于TRIZ中需求进化定律的一类原始创新过程研究

檀润华,马建红, 陈子顺,江屏

《中国工程科学》 2008年第10卷第11期页码 52-58

摘要：

需求进化定律是发明问题解决理论（TRIZ）体系中的最新研究成果，在分析这些定律的基础上，提出未来需求预测原理，定义了困难功能元的概念及效应综合方法

关键词： TRIZ 需求进化定律原始创新困难功能元效应综合法过程模型

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基于马尔可夫到达过程的两级可修备件（S-1，S）库存优化模型

陈童,黎放,狄鹏

《中国工程科学》 2015年第17卷第5期页码 113-119

摘要：

本文以两级可修备件库存系统为研究对象，采用马尔可夫到达过程（MAP）描述备件需求规律，考虑有限维修设施的情况，假设故障件维修时间、备件运输时间以及采购时间均服从phase-type（PH）分布，建立了一种描述能力更强、解析计算性更好的（S-1，S）库存优化模型，并推导出系统缺货量分布函数；然后通过算例演示了模型的优化效果，验证了模型的正确性和适用性。

关键词：（S-1，S）库存策略；两级库存；可修备件；马尔可夫到达过程

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基于随机有限集的非齐次马尔可夫链联合概率数据关联滤波器 Research Articles

朱昀1,2,梁爽3,吴晓军1,2,杨红红1,2

《信息与电子工程前沿（英文）》 2021年第22卷第8期页码 1114-1126 doi: 10.1631/FITEE.2000209

摘要：该转移矩阵随时间变化，使得目标标签向量分布的传播遵循非齐次马尔可夫链。证明了该链本质上是双随机的，并推导了相应定理。通过举例和仿真，验证了所提方法的有效性。

关键词：目标跟踪；滤波理论；随机有限集理论；贝叶斯方法；马尔可夫链

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“Partial pressures” of humid air in wide pressure and temperature ranges

Zidong WANG, Hanping CHEN, Shilie WENG

《能源前沿（英文）》 2013年第7卷第4期页码 511-517 doi: 10.1007/s11708-013-0281-7

摘要： “Partial pressure” in humid air is a question very much concerned by scientists and no satisfactory answer has been found to date. This paper proposes a novel method to obtain the “partial pressures” of the water vapor and dry air in humid air. The results obtained by the proposed method are quite different from that obtained by Dalton’s partial pressure law. The fundamental behaviors of water vapor and dry air are studied in depth in wide pressure and temperature ranges. Semi-permeable membrane models are proposed and applied for both saturated and unsaturated humid air. “Improvement factors” are developed to quantitatively describe the magnitude of the interaction between dissimilar molecules. One discovery is that the “partial pressure” of the water vapor in saturated humid air equals , rather than ( · ) which was formerly believed. The other is that the interaction between dissimilar molecules may be omitted when temperature is above “cutting-off temperature” for unsaturated humid air. This paper satisfactorily answers the quest of “partial pressures” in humid air from a new perspective.

关键词： partial pressure Dalton’s partial pressure law humid air saturated unsaturated

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Improving existing “reaching law” for better discrete control of seismically-excited building structures

Zhijun LI, Zichen DENG

《结构与土木工程前沿（英文）》 2009年第3卷第2期页码 111-116 doi: 10.1007/s11709-009-0022-5

摘要： In this paper, a novel “composite reaching law” was explained in details: 1) the equation of discrete motion for a control system; 2) the design of discrete-time variable structure control. In addition, the model of a three-storey shear-type building structure was used to verify the effectiveness of the discrete variable structure control method. The results of numerical example analysis of the model show that the control law can effectively reduce the peak value of seismic response of the building structure and the chattering effect of the control system.

关键词： discrete-time variable structure control composite reaching law chattering effect saturated control law

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MST-S型摩托车道路试验仪设计与研制

贾贵玺,徐伟,李洪凤,齐炜

《中国工程科学》 2005年第7卷第4期页码 74-78

摘要：

介绍了自行设计研制的MST-S型摩托车道路试验仪，该仪器运用光电传感原理，以AT89S52中央处理器为内核，通过在试验道路上设置光电反光器，在线检测出摩托车穿过此段距离的时间，计算出摩托车行驶中的各种参数MST-S采用了车载式燃油流量计，可准确完成油耗试验。测量中引入查询与中断结合方式以截取不同时间间隔，采用抗干扰技术提高仪器可靠性和测量精度，减小了测量误差。

关键词： AT89S52芯片 DS1642芯片在线检测光电隔离

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How did Archimedes discover the law of buoyancy by experiment?

Hidetaka KUROKI

《机械工程前沿（英文）》 2016年第11卷第1期页码 26-32 doi: 10.1007/s11465-016-0368-z

摘要：

After Archimedes and Vitruvius era, for more than 2000 years, it has been believed that the displaced water measurement of golden crown is impossible, and at his Eureka moment, Archimedes discovered the law of buoyancy (Proposition 7 of his principles) and proved the theft of a goldsmith by weighing the golden crown in water.

A previous study showed that a small amount of displaced water was able to be measured with enough accuracy by the introduced method. Archimedes measured the weight of displaced water. He did not find the law of buoyancy but rather specific gravity of things at the moment.

After which, Archimedes continued to measure the specific gravity of various solids and fluids. Through these measurements, he reached the discovery of the law of buoyancy directly by experiment. In this paper, the process to the discovery of Archimedes’ principle (Proposition 5) is presented.

关键词： Archimedes’ principle buoyancy specific gravity Eureka Vitruvius displaced water balance floating body

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Fatigue crack growth simulations of 3-D linear elastic cracks under thermal load by XFEM

SINGH,S. K. YADAV

《结构与土木工程前沿（英文）》 2015年第9卷第4期页码 359-382 doi: 10.1007/s11709-015-0304-z

摘要： This paper deals with the fatigue crack growth simulations of three-dimensional linear elastic cracks by XFEM under cyclic thermal load. Both temperature and displacement approximations are extrinsically enriched by Heaviside and crack front enrichment functions. Crack growth is modelled by successive linear extensions, and the end points of these linear extensions are joined by cubic spline segments to obtain a modified crack front. Different crack geometries such as planer, non-planer and arbitrary spline shape cracks are simulated under thermal shock, adiabatic and isothermal loads to reveal the sturdiness and versatility of the XFEM approach.

关键词： 3-D cracks fatigue life Paris law thermal load XFEM

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Why does environmental compliance cost more than penalty? —A legal analysis on environmental acts of enterprises in China

DONG Hongwei

《环境科学与工程前沿（英文）》 2007年第1卷第4期页码 434-442 doi: 10.1007/s11783-007-0069-2

摘要： In the environmental protection field of China, due to lower law-breaking cost but higher law-abiding cost , it is a common case that the enterprise chooses to break through the law on purpose. The punishment to the unlawful pr

关键词： law-abiding punishment environmental protection law-breaking enterprise