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Theoretical Model of Bidirectional Signal Propagation in Distributed EDFAs

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Chinese Journal of Lasers 1995年第4期B4卷 313-318页

作者： PANG Yong JIANG Peixuan XU Daxiong(department of Radio engineering,Beijing {2. ofPosts& Telecommunications, P.O.Box 66, Beijing 100088, China) Beijing Univ of Posts and Telecommunications Beijing China

ＴｈｅｏｒｅｔｉｃａｌＭｏｄｅｌｏｆＢｉｄｉｒｅｃｔｉｏｎａｌＳｉｇｎａｌＰｒｏｐａｇａｔｉｏｎｉｎＤｉｓｔｒｉｂｕｔｅｄＥＤＦＡｓ￥ＰＡＮＧＹｏｎｇ；ＪＩＡＮＧＰｅｉｘｕａｎ；ＸＵＤａｘｉｏｎｇ（Ｄｅｐａｒｔｍｅｎ... 详细信息

ＴｈｅｏｒｅｔｉｃａｌＭｏｄｅｌｏｆＢｉｄｉｒｅｃｔｉｏｎａｌＳｉｇｎａｌＰｒｏｐａｇａｔｉｏｎｉｎＤｉｓｔｒｉｂｕｔｅｄＥＤＦＡｓ￥ＰＡＮＧＹｏｎｇ；ＪＩＡＮＧＰｅｉｘｕａｎ；ＸＵＤａｘｉｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＲａｄｉｏｅｎｇｉｎｅｅｒｉ...

关键词： distributed fiber amplifier Erbium-doped fiber gain

THE SEGREGATION OF SULFUR AND PHOSPHORUS IN NICKEL-BASE ALLOY 718

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Acta Metallurgica Sinica(English Letters) 1997年第6期10卷 510-514页

作者： J.X. Dong X.B. Liu X.S. Xie and R.G. Thompson(department of Materials Science and engineering, {2. of Science and technology Beijing, Beijing 100083, China)({2. of Alabama at Birmingham, Birmingham AL352.4-4461, USA) Univ of Science and technology Beijing Beijing China

The segregation behavior of sulfur and phosphorus has been studied by means of scanning Auger microprobe (SAM) on microstructural interfaces,such as grain boundaries and carbide/matrix interfaces,The experimental results clearly reveal that sulfur strongly segregates on carbide/matrix interfaces,while phosphorus predominantly distributes on grain boundaries. Molybdenum tends to segregat on grain boundaries.

关键词： superalloy segregation,Alloy 718

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汶川地震砂砾土液化现象及现场确认实验

世界地震工程 2010年第S1期26卷 202-206页

作者：曹振中陈龙伟袁晓铭王维铭侯龙清徐红梅哈尔滨工业大学土木工程学院黑龙江哈尔滨150001 中国地震局工程力学研究所黑龙江哈尔滨150080 东华理工大学土木系江西抚州344000

通过汶川8.0级地震中不同地区、不同烈度的4个典型液化场地宏观现象分析以及现场测试,确认了汶川地震天然砂砾土液化的真实性并初步研究了其特征。结果表明汶川地震中砂砾土液化是真实存在的,4个场地均为砂砾土液化。地表喷出物与实际... 详细信息

通过汶川8.0级地震中不同地区、不同烈度的4个典型液化场地宏观现象分析以及现场测试,确认了汶川地震天然砂砾土液化的真实性并初步研究了其特征。结果表明汶川地震中砂砾土液化是真实存在的,4个场地均为砂砾土液化。地表喷出物与实际液化土类差异显著,而上覆非液化层厚度是影响地表是否可能喷出砾石的主要因素。重型动力触探击数是值得推荐的砂砾土液化判别的指标,若采用剪切波速指标则需要将砂砾土进行分类处理,需考虑含砾量、平均粒径等指标的影响。

关键词：汶川地震砂砾土液化地表喷出物现场测试级配曲线

Economic Risk Analysis Method of Flood Control engineering System Based on Stochastic Simulation of Triangular Fuzzy Numbers

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Economic Risk Analysis Method of Flood Control Engineering S...

2.09中国控制与决策会议

作者： JIN Ju-liang~(1,2.,FAN Qiu-ying~2.ZHANG Ming~3,ZHOU Yu-liang~2.1.Chengdu Institute of Plateau Meteorology,CMA,Chengdu 610072.China. 2.School of civil engineering,Hefei {2. of technology,Hefei 2.0009,China. 3.College of Hydrology and Water Resources,Hohai {2.,Nanjing 2.0098,China.

＜正＞Economic risk analysis of flood control engineering system is very important in risk management of flood *** triangular fuzzy numbers theory was used to describe and deal with randomicity and fuzziness of economic risk system of flood control engineering,and the shortage and imprecision of datum *** order to deal with the difficulties of operations of triangular fuzzy numbers and their functions,Monte-Carlo method was used to simulate triangular fuzzy numbers,which can transform the operations of triangular fuzzy numbers and their functions into the conventional operations of real numbers,and then a new economic Risk Analysis Method for flood control engineering system based on Stochastic Simulation of Triangular Fuzzy Numbers,named RAM-SSTFN for short,was *** applied results of RAM-SSTFN show that economic benefit series of flood control engineering system can be simulated using Monte-Carlo method,that RAM-SSTFN can consider more complex things and give more exact computation results than the simple analysis methods of economic risk analysis of flood control engineering system,and that the common simple analysis methods should be used carefully in economic risk analysis of important regional flood control engineering system because their computation precision is not ***-SSTFN can be used to deal with less,imprecise, random and fuzzy information,so it can be widely applied to risk management of different uncertainties systems.

关键词： flood control system economic risk analysis triangular fuzzy numbers Monte-Carlo method risk management

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川东宣汉地区飞仙关组裂缝特征及成因研究

西南石油大学学报（自然科学版） 2011年第4期33卷 78-84,192-193页

作者：唐海汪全林彭鑫岭李力黄德明西南石油大学石油工程学院四川成都610500 中国石化普光气田开发项目部四川达州635000

根据全直径岩芯、薄片鉴定等资料,对宣汉地区飞仙关组裂缝特征进行了分析,并利用常规测井资料对该区井剖面裂缝发育情况及纵向裂缝可能的分布情况进行了研究,在此基础上结合川东地区地质特征,对研究区裂缝成因进行了深入研究。研究结果... 详细信息

根据全直径岩芯、薄片鉴定等资料,对宣汉地区飞仙关组裂缝特征进行了分析,并利用常规测井资料对该区井剖面裂缝发育情况及纵向裂缝可能的分布情况进行了研究,在此基础上结合川东地区地质特征,对研究区裂缝成因进行了深入研究。研究结果表明:飞仙关组中下段主要发育有垂直构造裂缝、水平裂缝、斜交裂缝及成岩期形成的裂缝;裂缝主要有构造裂缝与非构造裂缝两类,构造裂缝成因主要包括与断层构造有关的裂缝、与褶皱构造有关的裂缝及与弱变形构造区有关的裂缝,力学成因主要有剪切裂缝、扩张裂缝和拉张裂缝3种基本类型;非构造裂缝主要成因可分为成岩裂缝、溶蚀裂缝、收缩裂缝、表生裂缝。生产实践表明,任何一种裂缝在碳酸盐岩储集层中均是重要的储集空间及渗流通道。

关键词：碳酸盐岩构造裂缝非构造裂缝飞仙关组常规测井

Quantum Operation for One Non-Markovian Qubit via AC Control

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Quantum Operation for One Non-Markovian Qubit via AC Control

第三十届中国控制会议

作者： XUE Shibei~1,ZHANG Jing~(1,2.,WU Rebing~(1,2.,LI Chunwen~(1,2.,TARN Tzyh-Jong~(2.3) 1.department of Automation,Tsinghua university,Beijing 100084,P.R.China 2.Center of Quantum Information Science and {2.,TNList,Beijing 100084,P.R.China 3.department of Electrical and Systems engineering,Washington university,St Louis,MO 63130,USA

This paper studies the simple alternating-current(AC) control strategy for performing quantum state manipulation under a non-Markovian environment(consisting of a cluster of two-level systems).Genetic algorithm is adopted to optimize the parameters of the AC control to fulfil one-qubit quantum operations,such as the NOT gate,the Z gate,and the Hadamard gate. Theoretical analysis and simulations show that our method can keep the Rabi frequency of the system away from the noise band so as to suppress low-frequency 1/f *** the meantime,the strategy can also drive the quantum state to the target state with high fidelities.

关键词： Non-Markovian Decoherence Open Quantum System 1/f noise

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房间气流测试仪表紊动特性的研究

天津大学学报 1986年第4期 58-63页

作者：马九贤天津大学土木工程系

随着空气调节技术的发展,人们对房间气流特性的研究越来越深入,这就要求对低速紊动的房间气流进行足够精确和可靠的测量,以探索房间气流的紊动结构同人们的热舒适感、工作效率、身体健康和能量节约之间的关系,本文详细介绍了一个对热风... 详细信息

随着空气调节技术的发展,人们对房间气流特性的研究越来越深入,这就要求对低速紊动的房间气流进行足够精确和可靠的测量,以探索房间气流的紊动结构同人们的热舒适感、工作效率、身体健康和能量节约之间的关系,本文详细介绍了一个对热风速仪测头进行紊动误差校正的装置和校正方法,进而找出一个定型测头在测量空气调节房间气流速度时所需要的紊动误差校正曲线。

关键词：热风速仪校正管道层流校正紊动校正紊动误差

弹粘塑性3D-FEM在地基蠕变沉降预测中的应用

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同济大学学报（自然科学版） 2001年第2期29卷 195-199页

作者：安关峰高大钊中国地质大学工程学院湖北武汉430074 同济大学地下建筑与结构工程系上海200092

采用适用于上海饱和软土的粘弹塑性模型 ,研制了三维有限元软件 .应用该软件对上海华盛路住宅大楼地基沉降进行了预测 ,并与实测值进行了对比 .结果表明 ,采用该本构模型和分步施加荷载方法进行地基蠕变沉降预测是可靠的 .

关键词：粘弹塑性模型流变三维有限元软件地基蠕变沉降预测 3D-FEM 粘塑应变应力增量

ON THE CALCULATION OF MESOPORE SIZE DISTRIBUTION BY THE GAS ADSORPTION METHOD

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Journal of China Textile university(English Edition) 1990年第4期8卷 1-6页

作者： Tong Husong Chen Xiaoli Zhang Honglang, department of Textile Chemical engineering department of Textile Chemical engineering 陈晓立张红浪

Seeing that some commercial gas adsorption instrument still uses a too rough method for cal-culation of mesopore size distribution, we reviewed some practical methods of calculation so farproposed in the literature. We have found that most of these methods and many books have someincorrectness in the geometric factor Q_i used for the calculation of pore volume △V_i from corevolume △V_i^k. It has been proved that the correct expression for Q_i should be[_i/(_i^k+1/2.t_i)]~2.or cylindrical pores, _i,/(_i^k+1/2.t_i)for slit-shaped pores. On the basis of this correct Q_i,these methods were applied to the desorption isotherms. The results were compared and analyzed.

关键词： porous material pore size distribution adsorption capillary condensation