基于遗传算法的工艺规划与调度集成方法

为了实现制造系统中的工艺规划与调度集成，采用遗传算法解决工艺规划与调度集成的问题，并构建了相应的工艺规划与调度集成模型．在对遗传编码和算子结构的设计中，利用交叉算子来变换加工顺序，用变异算子来改变工艺路线．在考虑设备负载平衡以及加工任务完成时间最短的条件下，将工艺规划和车间调度相结合，实现了最优工艺路线与调度结果的同时生成．通过算例分析，证明此方法能够有效地实现工艺规划与调度的集成．     

“问题解决教学模式”在数学新课程中的运用

通过阐述“问题解决教学模式”的内涵，总结了在数学教学中有关概念形成的教学、规律教学、习题课的教学及活动课教学四方面应采用的“问题解决教学模式”．     

Web2．0下的电子商务教学模式探索

阐述了传统电子商务教学中存在的问题，分析了基于Web2．0的交互式电子商务教学模式，探讨了这种教学模式在电子商务教学中的应用。     

区间优化方法在水库调度中的应用

应用区间分析思想，将区间优化方法引入水库调度问题，同时以水库防洪调度为例，建立了区间优化模型．结合实例对水库调度区间优化方法进行验证，并与传统的动态规划方法做了对比．结果表明，区间优化方法用于水库调度问题，不仅优化原理清晰、计算方法易于理解，而且所得结果优于动态规划方法．     

网络化集成制造模式下调度问题的混合遗传算法

研究了网络化集成制造模式下的JOB-SHOP调度问题，即各任务有具体交货期约束的提前／拖期不同惩罚系数的复杂调度问题；提出了一种新的编码方案和相应的交叉算子，进而提出混合遗传算法；成功解决了上述问题，即找到一个最优调度，使在交货期窗口外完工的任务所受到的提前／拖期惩罚的总和最小．该算法解码复杂度低、通用性强、罗拔性强，最后用算例说明了算法的有效性并指出了工件车间调度问题中尚待解决的问题．     

信息技术与职业学校导游课程整合的实践与反思

信息技术应用于职业学校专业教学，创新职业教育教学模式，改变了职业学校教学沿用了多年的普通高中的教学模式，形成了特有的教学方式．信息技术与导游课程整合有效地促进了学生的学习，改变了职业学校传统的课堂教学模式。教师把信息技术、信息资源、信息方法渗透到导游课程的教学中，通过信息技术与导游课程整合的实践研究，总结了整合的方式，反思了整合过程中存在的问题及解决的方法。     

构建以问题为核心的线性代数双语教学体验学习环境

为深化高校线性代数教学模式，构建以问题为核心的线性代数双语教学体验学习环境成为了改进高校线性代数教学效果的重要突破口。这种教学模式充分体现了“贴近实际”、“贴近学生”的精神。该文拟通过对当前我国线性代数课教学模式的深入调查研究，提出构建以问题为核心的线性代数双语课教学体验学习模式的必要性；探讨了这种教学模式的基本原则与思路。     

一种开放式的体育教学模式一“体育超市”

近几年，职业学校借鉴高校”超市”教学模式，采取了体育课“基础＋选修”的尝试，这种模式让学生享受更多的运动乐趣，体验更多的运动成功．从而使学生个性得到充分发展，深受师生欢迎．本文就这种模式中存在的问题进行分析，就教学过程中，场地、器材、人员的使用方面进行了新探讨，发现新策略使班级间关系融洽；体育器材的使用率得到提高，同时也体现新时代师生的主人翁精神。     

初中政治教学模式反思

课堂教学模式一直是教师关心的重点问题，以往的教学模式难以摆脱模式化、僵硬化的特点。课堂教学也是以教师讲解为中心，加以板书及其他教学媒体进行教学，学生则被动地接受知识。政治教学在一定程度上来看有些许模式化。在新课改的推行下，初中政治教学模式的改变是一个亟须解决的问题。     

网络环境下的大学英语教学模式

多媒体和网络环境下的大学英语教学．打破了传统英语教学中的单调模式，丰富了教学资源．提高了教学效率。通过对网络环境下教学模式的探讨．提出了网络教学模式面临的问题。     

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