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220kV输电线路反击耐雷性能及高电位转移现象的研究
高广德,向文,胡江,饶希达,隆恩
电瓷避雷器 , 2015, DOI: 10.16188/j.isa.1003-8337.2015.04.009
Abstract: 采用ATP/EMTP软件对?亭地区220kV输电线路建模,通过软件仿真,分析了避雷器安装方式及工频相位角对线路反击耐雷性能的影响。利用两者对线路反击耐雷性能的影响,提出了两种新方案,并针对雷击杆塔这种情况,仿真分析了原方案及两种新方案的反击耐雷性能及高电位转移后对相邻杆塔的影响。结果表明:方案二的反击耐雷性能好,而且高电位转移现象轻微,不威胁相邻杆塔的安全运行。
石油企业社会责任与竞争力关系的实证研究—以中国石油天然气集团公司为例
Relation between Corporate Social Responsibility of Petroleum Corporate and Corporate Competitive Power of Petroleum Corporate—Take the Chinese Petroleum Corporation for Example
 [PDF]

李宏勋,
Modern Management (MM) , 2012, DOI: 10.12677/mm.2012.22015
Abstract: 论文以企业社会责任和企业竞争力的相关理论为基础,对石油企业社会责任和石油企业竞争力进行分析,提出研究假设,利用层次分析和相关性分析对石油企业社会责任的履行与石油企业竞争力之间的关系进行研究。论文选取中国石油天然气集团公司为研究对象,以其2006~2010企业社会责任报告和集团年度报告的相关数据为依据进行研究;研究表明:石油企业社会责任和石油企业竞争力之间存在着显著的正相关性,两者之间具有相互促进的作用。
This article based on the social responsibility theory and enterprise competitiveness theory. Analysis the corporate social responsibility of petroleum corporate and corporate competitive power of petroleum corporate, and propose the research hypotheses. This article uses the analytic hierarchy process and correla-tion analysis to study the relation between corporate social responsibility of petroleum corporate and corpo-rate competitive power of petroleum corporate. This article selects the Chinese petroleum corporation as the research sample; use the data of its 2006-2010 corporate social responsibility report and annual report. The research shows that corporate social responsibility of petroleum corporate and corporate competitive power of petroleum corporate has a significant correlation between each other.
应用高阶概率权重矩法估计广义极值分布参数
Estimation of GEV Distribution Parameters by Higher Probability Weighted Moments
 [PDF]

, 宋松柏
Journal of Water Resources Research (JWRR) , 2012, DOI: 10.12677/JWRR.2012.15055
Abstract: 在洪水频率分析计算中,当点绘年最大洪峰流量序列的经验频率时,经验点据常常出现两段或多段的分散区,重现期较大的洪水估算一般是根据大中洪水值的趋势进行外推。本文根据高阶概率权重矩法原理和广义极值分布估算参数模型,进行陕北地区神木水文测站的年最大洪峰流量频率分布参数计算。结果表明:高阶概率权重矩法能赋予大洪水值更多的权重。蒙特卡洛模拟试验表明:并非阶数越高越好,适当提高阶数可以减小误差,但阶数过高反而会增大误差。
When an annual maximum flow series is displayed in a probability plot for the analysis of flood frequency, the data often exhibit two or more distinct segments. For estimating floods of large return periods, it is probably extrapolated by the trend of large and medium-sized flood values. The principle of higher probability weighted moments (HPWMS) was employed to estimate parameters of generalized extreme value (GEV) distribution. The results show that the higher the order are, the better fitting of the GEV distribution to annual maximum flows in larger segments. The Monte Carlo simulations also show that moderate order of HPWMS may reduce the estimation errors rather than higher order, and conversely, over-higher orders may increase the estimation errors.
一类高阶n维非线性伪双曲方程组的初边值问题
The Initial Boundary Value Problems for a Class of Multidimensional Nonlinear Pseudo-Hyperbolic System of Higher Order
 [PDF]

严曼, 黎明
Advances in Applied Mathematics (AAM) , 2013, DOI: 10.12677/AAM.2013.21004
Abstract:

本文研究了一类高阶n维非线性伪双曲方程组,利用Galerkin方法,通过解的先验估计,结合Sobolev嵌入定理,证明了初边值问题整体强解的存在性和唯一性。
In this paper, the initial boundary value problems for a class of multidimensional nonlinear pseudo- hyperbolic system of higher order have been studied by Galerkin method, combining with the priori estimate of solution and Sobolev imbedding theorems, the existence and uniqueness of the global strong solution have been proved.

数学技术、信息技术与职业技术融合成效及其展望
The Integration Effect and Its Prospect of the Technology of Mathematics, Information and Occupation
 [PDF]

翠娥
Advances in Education (AE) , 2012, DOI: 10.12677/ae.2012.21001
Abstract:

对数学技术、信息技术概念进行了界定,分析了数学技术、信息技术与职业技术的融合机理,数学技术、信息技术在促进职业技术的形成和发展中的作用,指出数学技术、信息技术与职业技术融合是培养高层次、创新型、复合型人才的关键。
This article defines the concept of mathematics technology, information technology and occupa- tion technology, analyses the integration mechanism of the technology of mathematics, information and occupa- tion and the application of the mathematics technology and the information technology in forming and developing the occupation technology and this article also points out their integration plays a key role in the development of the innovative and compound talents with high levels.

不同栽培方式对美人蕉生长发育及生理特性的影响
Effects of Different Cultivation Methods on Growth Development and Physiological Traits of Canna
 [PDF]

月娥
Botanical Research (BR) , 2014, DOI: 10.12677/BR.2014.34019
Abstract:
本文比较了盆栽、水培和地栽三种不同栽培条件对5种不同美人蕉植株生长发育和生理特性的差异。结果表明,地栽方式有利于根系尤其是主根的伸长,水培有利于美人蕉侧根以及毛细根数量的增加和根系表面积的增大,后者对于植物养分吸收与生长发育更为有效。水培条件还对美人蕉的植株有一定的矮化作用,使其根冠比增大。测定不同品种在水培和地栽条件下基于叶绿素荧光参数的光合速率无明显差异,而5种美人蕉在盆栽条件下的光合效率、生长速率均最低。因此,美人蕉极具水培花卉的潜质。
The cultivation experiments were conducted to study the differences in potted culture, hydroponics and soil culture on the growth development and physiological traits on five Canna cultivars. The results showed that soil culture was conductive to roots growth, especially the taproot of Cannas. In contrast, hydroponics could increase quantity of lateral roots and capillary root and magnify root cap area. The latter could facilitate nutrient uptake and growth development of plants. Meanwhile, hydroponics could dwarf Canna plants and increase the root cap ratio. Expressed by fluorescence parameters, photosynthetic efficiency of Canna plants had no significant difference between the hydroponics treatment and the soil culture treatment. Five Canna cultivars by potted culture had the lowest level of photosynthetic efficiency and growth rate. Thus, Canna could be used as hydroponic ornamental flowers.

客观语音质量评估算法的研究
Study on Objective Speech Quality Assessment Algorithm
 [PDF]

累累, 张伟伟
Hans Journal of Wireless Communications (HJWC) , 2013, DOI: 10.12677/HJWC.2013.36024
Abstract: 本文的目的是研究最新客观语音质量评估算法的表现。在通信系统中,语音的质量对于评估系统的表现是一个主要的因素。为了达到评估语音质量的目的,开发有效的语音质量评估算法是必须的。感知的语音质量客观评估算法是最有用和最便捷的方法。在这篇论文里,我们将要讨论评估通信系统和网路中的语音质量的最新的ITU标准PESQ (语音质量的感知评估)POLQA (感知客观语音质量评估)算法。POLQA是一个技术升级,它能够覆盖最新的语音编码和网络传输技术,对于3G4G/LTEVoIP网络有了更高的准确度。我们分析了POLQA的表现,并且将POLQAPESQ作了对比。从实验数据的结论来看,我们得出了如下结论:POLQA相较于PESQ有更好的表现,并且即将替代
带常利率的时间间隔为相位的Gerber-Shiu折现罚金函数
The Gerber-Shiu Discounted Penalty Function for the Risk Model with Phase-Type Inter Claim Times
 [PDF]

菊霞
Pure Mathematics (PM) , 2014, DOI: 10.12677/PM.2014.44022
Abstract:
相位分布的研究在研究正半轴的其他分布中起着重要作用。考虑带常利率的时间间隔为相位分布的更新风险模型。首先推导出Gerber-Shiu期望折现罚金函数满足的积分微分方程,然后经过一系列的推导过程得到Volterra形式的矩阵积分方程,从而得到Gerber-Shiu期望折现罚金函数的一种解法。
Research in the phase-type distribution has an important influence for the research of other dis-tributions on the positive real axis. It considers the risk model with the phase-type inter-claim times and for constant interest, it first derives the integral-differential equation satisfied by the Gerber-Shiu discounted penalty function. Then through a series of deriving, it obtains the volterra integral equation in a form of matrix. It gets a method of solving the Gerber-Shiu expected penalty function.
环形DNA分子构象统计
Conformations of DNA Loop
 [PDF]

张兴华, 弘毅
Applied Physics (APP) , 2014, DOI: 10.12677/APP.2014.42002
Abstract:
DNA环的形成和性质是生物物理以及软物质物理关注的基本问题。本文以蠕虫状链为模型,应用蒙特卡洛方法模拟了锚定在蛋白质上的DNA环的构象统计。给出了DNA环在不同长度序列情况下的择优构象状态,讨论了不同构象情况下DNA分子对锚定点的作用力。
The formation and property of DNA loop are the basic problems of biophysics and soft matter physics. In present work, the conformational statistics is studied by Monte Carlo method based on the wormlike chain model. The priority conformational state for the different length of DNA loop is predicted and the force acting on the grafting point is also discussed.
基于ArcGIS Model Builder的地形指数提取方法及实践研究
The Study on Terrain Index Extraction Method and Practice Based on ArcGIS Model Builder
 [PDF]

, 解鹏
Geomatics Science and Technology (GST) , 2013, DOI: 10.12677/GST.2013.13003
Abstract:
流域地形指数水文模型TOPMODEL已被应用于陆面模式(Land surface Models, LSMs)以改进陆面模式对水文过程的模拟。地形指数(ln(α/tanβ))是TOPMODEL的核心,是进行水文分析的重要指标。因此,高效的提取地形指数信息非常重要。本文将淮河流域作为案例区,以地形指数单流向算法为理论基础,利用ArcGIS9的Model Builder建模工具,建立地形指数提取模型。在模型设计过程中充分考虑到汇流面积、坡度等参数的有效性,使模型具有较高的通用性。使用者启动模型加载数据即可简单又快速地获得地形指数分布数据。
River terrain index TOPMODEL hydrological model has been applied to Land surface model (Land surface Models, LSMs), to improve Land surface of hydrological process simulation model. The core of TOPMODEL is terrain index (ln(α/tanβ)). And it is an important index on the hydrologic analysis. Therefore, effective extracting terrain index information is very important. In this paper, the huaihe river basin as a case area, the terrain index extraction process model is build, using the ArcGIS9 Model Builder tools. This model is based on a single flow algorithm for calculating process. Model has higher versatility, because of fully considering the effectiveness of the parameters such as the slope and the flow accumulation in the model design process. Using this model can be very simple and quick to get terrain exponential distribution data of terrain index.
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