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Search Results: 1 - 10 of 199373 matches for " 陈 敏 "
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基于最小成本法的我国农业生产要素产出弹性的估算
Estimating Output Elasticities of Agricultural Production Factors in China Based on the Least Cost Method
 [PDF]

管宇,
Statistics and Applications (SA) , 2015, DOI: 10.12677/SA.2015.41001
Abstract:
本文基于最小成本法的市场假设,利用历年农产品生产成本收益调查数据和相关文献,结合农林牧渔业分项产值构成进行加权平均,估算得到目前我国农业生产物质消耗(资本)、劳动和土地投入比重即产出弹性分别约是0.55、0.3和0.15。它克服了目前流行的回归优化而带来的不稳健性。另外,测算了全国农林牧渔业和大农业的科技进步贡献率。
Based on market hypothesis of the minimum cost method, using historical production cost benefit survey data and related literature, combined the weighted average of farming, forestry, animal husbandry, fishery, this paper estimates that the current output elasticities of the investment proportion of the agricultural production material consumption (capital), labor and land are about 0.55, 0.3 and 0.15 respectively. It overcomes un-robustness of the popular regression optimize method. In addition, the contribution rates of scientific and technological progress on the farming, forestry, animal husbandry, fishery and mega-agriculture are measured.
民族冲突的社会心理原因与化解方法
Ethnic Conflict: Why and How?
 [PDF]

蒋光玉,
Advances in Psychology (AP) , 2014, DOI: 10.12677/AP.2014.41008
Abstract: 民族冲突在很大程度上影响了一个国家的繁荣和稳定,也成为了目前社会心理学研究的热点之一。众多研究者们从不同方面探讨了民族冲突产生的原因,进而提出了现实冲突理论、社会认同理论以及相对剥夺理论。对于民族冲突的化解方法,通过民族间平等的接触,并为了共同的目标进行合作被认为是最有效的方法之一。除此之外,利用共同内群体认同模型、双重认同模型和交叉类别分类的原理,扩展民族身份认同的范围,也是一种能有效化解民族冲突的方法。这些方法为我国促进民族关系的和谐提供了借鉴。
 Ethnic conflict endangers a nation’s prosperity and stability to a great extent; it also became one of the hot topics in the study of social psychology. Many researchers explored the causes of ethnic conflict from different aspects and put forward three theories: realistic group conflict theory, social identity theory and relative deprivation theory. Referring to the methods to reduce or resolve ethnic conflict, interethnic contact which is based on equal status, common goals and interethnic cooperation is considered to be one of the effective ways. In addition, according to common ingroup identity model, dual identity model and cross categorization classification, extending the scope of ethnic identity can also resolve ethnic conflict. These methods are used for reference for our country to promote ethnic relations harmoniously.
激光位移传感器中线阵CCD驱动方法的设计
Design of Driving Linear CCD in Laser Displacement Sensor
 [PDF]

,
Open Journal of Circuits and Systems (OJCS) , 2015, DOI: 10.12677/OJCS.2015.42004
Abstract:
针对CCD在激光位移传感器中的应用,介绍了一种基于CPLD的线阵CCD驱动方法。对TCD1703C型号的CCD工作时序做了分析,设计了独特的时序产生方法,使CCD的扫描频率可在四种频率间切换,最高达10 MHz。采用Verilog语言编写了驱动代码,结合Modelsim、Timequest等EDA工具进行时序检查与约束。针对CCD信号峰值随扫描频率变化而变化的特点,设计了基于程控放大器的信号处理电路。最后搭建了测试系统,对该驱动方法进行实验验证。实验结果表明测试系统在四种扫描频率下都能正常工作,获得的CCD信号合适,满足激光位移传感器的应用需求。
A design of driving linear CCD based on CPLD was proposed, which was fit for laser displacement sensor. A unique timing generation method was proposed through the analysis of timing of TCD1703C. The scanning frequency can be changed, which is different from the past. There are four scanning frequencies to choose and the highest is 10 MHz. The timing code was written in Verilog language. Modelsim, Timequest and other EDA tools were used to constrain timing and optimize it. A circuit based on programmable amplifier was designed for signal processing. A test system was established and this driving method was tested on it. The result showed that the test system worked normally with all scanning frequencies and the signal from CCD was excellent. This design is suitable for CCD laser displacement sensor.
一类高阶线性微分方程亚纯解与小函数的关系
Relation between Meromorphic Solutions of a Class of Higher Order Linear Differential Equations and Functions of Small Growth
 [PDF]

, 宗煊
Pure Mathematics (PM) , 2014, DOI: 10.12677/PM.2014.41002
Abstract:
本文研究了一类亚纯函数系数高阶齐次和非齐次线性微分方程的亚纯解的增长性,并进一步研究了它们的亚纯解与小函数的关系。其中某一个系数具有有限亏值或满足一定条件,其余系数也满足相应的条件。
In this paper, we consider the growth of the meromorphic solutions of a class of higher order homogeneous and non-homogeneous linear differential equations with meromorphic coefficients, and further consider the relation between their meromorphic solutions and functions of small growth, where one of these coefficients has a finite deficient value or satisfies some conditions, others satisfy corresponding conditions.
北冰洋: 生物生产力的“沙漠”?

科学通报 , 2002,
Abstract: 利用14C吸收法、3H吸收法、234Th/238U不平衡法和210Pbex测年法分别测定了北冰洋的初级生产力、细菌生产力、颗粒有机碳输出通量及沉积物有机碳埋藏速率. 结果表明, 北冰洋水柱积分生产力介于3.8~197.1 mmol C/m2@d, 高于早期的报道值, 其中楚克奇陆架区初级生产力水平高于深海盆地. 积分细菌生产力与初级生产力的比值大于0.5, 表明在北冰洋寒冷的水体中细菌活动并未受到明显限制. 由234Th/238U不平衡获得的234Th亏损程度、溶解态与颗粒态234Th停留时间、颗粒有机碳的输出通量均证实, 北冰洋深海盆地仍存在一定的颗粒清除、迁出作用. 夏季期间楚克奇陆架沉积物有机碳埋藏速率为25~35 mmol C/m2@d, 占水柱初级生产力的59%~82%, 表明有机碳的输送与埋藏是非常高效的. 上述证据均表明, 至少在夏季期间, 北冰洋并非生物生产力极其贫瘠的海洋"沙漠", 它存在相对活跃的海洋碳循环过程, 重新评估北冰洋在全球碳循环中的作用显得更为重要.
程序模式的实验效应分析

中外法学 , 1992,
Abstract:
ARCH(p)模型的严平稳遍历性和高阶矩

科学通报 , 1995,
Abstract: 其中α_o>0,α_i≥0,i=1,2,…,p,{ε_t}是i.j.d随机序列,Eε_t=0,Eε_t~2=1.称模型(1)为ARCH(p)(Autoregressiveconditionalheteroscedasticity)模型.它由Engle首先引入并被广泛地用于计量经济建设,如通货膨胀率、兑换率、利率和股票价值(应用文献见J.ofEconometrics,52(1992),1~311及其所引文献).但关于模型(1)的严平稳遍历性和高阶矩存在的条件,至今尚无满意的结果,而这些条件是时间序列统计推断的基础.Nelson对ARCH(1)给出了严平稳遍历的充要条件,他的结果无法推广到ARCH(p)的情形.Bougeral和Picard给出了ARCH(p)存在严平稳遍历解的充要条件,但他们在同一篇文章中又指出这一条件的验证是非
拉杆沿斜截面胶合问题的讨论

力学与实践 , 2000, DOI: 10.6052/1000-0992-f2000-111
Abstract: 通过分析指出用均质等截面拉杆的斜截面应力公式求解非均质的胶合问题是不妥的,并给出了建议方法.
图乘法求位移中关于标准抛物线的一种误解

力学与实践 , 1994, DOI: 10.6052/1000-0992-1994-019
Abstract: 图乘法求位移中关于标准抛物线的一种误解陈敏(新疆石河子农学院水利系石河子832000)目前国内大中专结构力学教材里,在图乘法求位移的论述中,均可见这样的字样图中给出了位移计算中几种常见图形的面积和形心位置。在应用抛物线图形的公式时,必须注意在顶点处...
关于Riccati方程的一个结论

福州大学学报(自然科学版) , 2013,
Abstract: 给出周期系数Riccati方程存在周期解的一个充分条件,该条件涵盖了Riccati方程存在周期解的两个经典定理. 还给出了Riccati方程周期解不存在的一个充分条件. 举实例说明它们具有更广的适用性.
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