UEND 和 φ 混合随机变量随机和的精确大偏差

介绍了UEND和φ混合的相依关系的随机变量,研究了具有UEND和φ混合的相依关系的随机变量的随机和的尾概率问题,利用一种求相依关系的随机变量的随机和的大偏差方法,得到了具有UEND和φ混合的相依关系的服从重尾分布的随机变量的随机和的渐近尾概率的结果,将服从独立不同分布的随机变量的随机和的一致渐近结论推广到了服从不同分布的带相依关系的随机变量的随机和的结论上.     

马克思环境哲学思想论要——读《1844年经济学哲学手稿》

《1844年经济学哲学手稿》包含着马克思环境哲学思想的主要内容，这体现为六个方面的有机统一：人的自然性与人的社会性的统一是从人及自然各自的根本属性出发，说明人与自然的矛盾统一，是马克思环境哲学的思想基础；人与自然的关系和人与人的关系的统一，是从两类关系的关联性出发，说明它们和谐的内在必然性，是马克思环境哲学的核心内容；自然史与人类史的统一是从人的社会性出发，说明的是人的社会本质，是马克思环境哲学的价值依据；无机身体与有机身体的统一是从人的自然性出发，说明的是人的自然的本质，是马克思环境哲学的理论特征；物的尺度与人的尺度的统一，是从人的实践本性出发，说明的是人的主体性的特殊规定，是马克思环境哲学的实践原则；自然主义与人道主义的统一是从人与自然和解的根本旨归出发，说明的是人的全面发展的必由之路和必然之境，是马克思环境哲学的终级关怀和最高道德境界。     

CAXA数字化实训工厂整体应用介绍

数字化的实训工厂由学校建立的类似于企业式的真实生产的环境,只是工厂里面的各种工人的角色变成了在校的学生.学生的实训项目是按照企业的生产过程来组织和分摊岗位的.实训的目的不仅可以让学生掌握进入企业的基本制造方法和技巧,并且能通过先进的管理设备对学生进行管理和控制.在实训的整体组成组块和技术的帮助下可以实现实训过程的技术化和信息化.数字化的实训工厂通过对学生进行基本流程教学和基于工作流程的项目式的教学来提高学生的实际应用知识的水平,主要的过程有学生的入学和理论知识的学习以及在工厂的实操实训.在提高实训工厂整体的运作水平的同时使学生的理论和实践的知识达到完美的结合状态.     

关于群中元素阶的研究

主要从元素阶的角度出发,研究元素的阶常见的性质及结论为进一步研究群的结构的有关性质打下了坚实的基础.探索元的阶和群的阶之间的内在的联系;元的阶和群的类型之间的内在的联系;群中某些元的阶也有着内在的联系.     

现实视角下的人的发展

现实的人和人的现实是人的发展的现实,前者涉及人的主体问题,后者涉及的是人的发展的基础和条件的问题,它们是相互转化的,推动人的发展,从现实出发,人的发展是无限的。     

农业高效用水研究进展与发展趋势分析

众所周知水资源在我国是十分的缺乏的,严重短缺的水资源已经对我国的的生态环境的健康发展和我国农业经济的可持续的进步发展造成了极大的阻碍。因此要及时解决我国农业的缺水问题和农业高消耗水低产出的问题。如果继续实行我国的传统的外延型的农业灌溉增长方式和传统的高耗水型的农业增长方式是无法行使的。必须走发展节水型农业的内涵式增长,依靠科技创新大幅度提高水的利用效率的道路,从传统的旱地雨养农业向现代高效节水灌溉农业和粗放型灌溉农业、节约用水型的绿色农业和节约水型的旱地农业的道路上前进。只有走这样的路线才能改变我国农村的经济发展方式,才能促进我国农村农业的发展,才能提高农民的经济收入,提高农村农民的生活质量。     

智能控制及其在火电厂热工自动化的应用

我国的电力工业目前的发展十分的迅速,比较大的容量火力发电机组也是逐渐成为电网中的一个骨干的机组。对单元机组的提出了更高的要求是由于我们必须保证单元机组的每时每刻都要正常的运行,且必须保持高度的安全性和经济性。每一个单元机组都有大迟延和严重的非线性以及扰动的频繁的特点,对于传统的控制方法来说,它们目前已经不能满足电网对机组的一些要求了,所以先进的智能化控制策略必须将要取代常规的控制策略,先进的智能控制策略将会成为火电厂控制发展的一个趋势。解决不确定性系统控制的难题的一个有效的方法是模糊控制,就是所谓的以神经元网络控制为代表的智能的控制策略。在最近的一些年中模糊控制已经取得了一个巨大的发展,在未来的日子里它将会在复杂的热工过程控制中发挥着重要的作用。本文主要研究的是新型智能控制系统,它在工程的使用价值上具有重要的意义。     

高校教学管理运用中教学秘书的辅助作用

在现在教育多样化的时代,教学秘书是学校新兴起的一种职业,高校的教学秘书是组成教育体系的一个重要组成部分,它虽然负责的工作是比较基本的,但是高校的教学秘书有着承上启下、承前启后的作用,教学秘书的作用是连接教师以及各部门之间的重要桥梁,通过教育的改革以及教育的深化性,高校的教学秘书也迎来了全新的机遇与进一步的挑战,在现在高速发展的年代,各大高校的教学秘书必须要适应当前的发展前景,也要不断地提高自身的综合素质能力并且要不断地充实自己,不断地提高自己的工作水平,要树立起责任心。教学秘书的作用也是高校管理工作的部分之一,作为高校的教育者,要时刻认清教学秘书的角色定位与其相关的工作性质,并且要充分地利用教学秘书的作用以及相关的辅助功能,为高校的发展做好进一步的帮助,为高校的管理提供更加有效的、更有价值的服务。     

石子压碎指标之新认识

随着对C50以上高性能混凝土需求量的不断增加,我公司为了保证混凝土的质量。所以对混凝土原材料的严格控制则显的非常重要,经过长期的试验发现现在标准规定的石子的压碎指标的试验方法并不仅仅反映石子的强度。而且反映了该石子的级配的好坏。由于石子的强度对C50以上混凝土的强度的影响非常的关键的。所以能够真实的掌握石子的真实强度则显的尤为重要。本文将具体阐述石子本身强度和石子级配与压碎指标的关系。     

植物对大气污染的反应与城市绿化

目前全人类面临的重大问题小红最为严重的之一就是大气污染问题,首当其冲。依据绿色植被天污染物之间的化学反应来对城市的绿化进行选择是能够减轻城市污染的一种极其重要的补充工具。在过去我国的研究之中,对于植物对不同的大气污染物之间的反映是有着很大的局限性的,其难以攻克的点在于,依照不同的浓度的大气污染物对植物进行汛期的实验同现场观察植物的叶片的宏观受寒的症状来对植物受损伤的程度进行估计污染物的抗性等级。而这并没有统一的标准。本文将就此提出相应的合理化意见和建议。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

Features of Women''s language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

英文诗歌中的喻类修辞

为了有助于提高英文爱好者的个人情操、文化素养和学习兴趣,以及专业人员对英语学习和研究进行多途径的探索,本文通过一些精选诗歌的引证和分析,着重论述了喻类修辞法在英文诗歌中的运用其及效果。     

Man Is Unable to Change the Miserable Life——Analysis of the Arrangement of Four Characters in The Glass Menagerie

Tennessee Williams is considered as one of the most important American playwrights since World War II.The Glass Menagerie is his first successful drama,which describes a tragic situation of family and means to say that Man is unable to change the miserable life,no matter whatever means he try,This essay focuses on the analysis of the arrangement of the four main characters:Laura.Amanda,Jim and Tom to reveal the theme.Laura is fragile.Amanda is brave.Jim is vital.Tom is sensible.And all of them develop and try the different means to struggle against life,but fail tragically.With the evidence,the paper comes to conclusion naturally that Man is unable to change the miserable life,and he dooms to fail.     

Characterization of root-nodulating bacteria on Retama raetam in arid Tunisian soils

The aim of this study is to investigate the diversity of Retama raetam root-nodule bacteria isolated from arid regions of Tunisia. Twelve isolates, chosen as representative for different 16S rRNA gene patterns, were characterized by 16S rRNA gene sequencing and phenotypic analysis. Isolates were assigned to Sinorhizobium, Rhizobium and Agrobacterium. Symbiotic properties of Sinorhizobium and Rhizobium isolates showed a large diversity in their capacity to infect their host plant and fix atmospheric nitrogen. Strain RK 22 identified as Rhizobium was the most effective isolate.     

An Affordable Accurate Evaluation of the Binding Conformations Predicted by Molecular Docking Studies in Bio-System

正Recently,docking has been widely used to predict the binding-modes of protein-inhibitors,when the crystal complexes structure was absent.Most docking algorithms are able to generate a large number of probable conformations,it,however,is difficult to effectively evaluate these docking poses and identify the most reasonable bindingmode.In the present study,on the basis of the crystallographic data of human 3-hydroxy-3-methylglutaryl coenzyme