基于HTML5的数据结构算法演示系统的设计与实现

算法的动态演示对学习数据结构算法起着重要的作用,传统的web算法演示系统依赖于FLASH插件,HTML5可以在网页上直接绘图,为算法的动态演示提供了一种新方法,研究了HTML5实现动画演示的方法,设计了数据结构算法动态演示系统的总体框架,并对其中的关键技术及其实现方法进行详细的阐述,最后给出了一个约瑟夫环算法的应用实例。该系统具有操作简单、交互方式灵活,动画演示直观形象等优点,在实践中取得了良好的教学效果。     

注塑模冷却CAD系统的研究与实现

注塑模冷却系统设计是在注塑模设计的一个非常重要的环节,以电子接插件用塑件在注塑模设计为例,对注塑模冷却系统进行充分分析的基础上,开发了注塑模冷却ＣＡＤ系统,该系统将制品进行基本分类,建立以菜单驱动检索的图形库,可以根据制品形状尺寸,大致确定模具外形尺雨和型芯型腔尺寸,并根据塑料材料的性能,加工工艺条件选择冷却方式等,粗略地确定出冷却管道的布置情况,预测制品的顶出温度,在进行预测值与期望值比较的基础     

基于模型推理的智能注塑模设计系统

基于模型推理 (MBR)是构建知识系统推理机制的一种方法 ,将该技术集成于通用 CAD设计软件 ,使设计软件具有一定智能 ,提高设计效率 .简述了 MBR的特点 ,并将其与基于规则推理、基于实例推理进行了比较 ,阐述了 MBR技术在注塑模设计中的应用 ,在 Pro E设计平台上构建了 MBR的智能注塑模设计系统 .经工程实践 ,该系统可以有效地提高设计效率     

基于Web服务构件的算法演示系统的设计与实现

针对网络教育软件开发中遇到的重复开发、资源难以共享、难于扩展等问题，设计了一个基于服务体系结构Web Services的算法演示系统，介绍了算法动态演示模块的设计与实现方法。     

下期发表论文摘要预报

基于模型推理的智能注塑模设计系统蔡　毅 ,　娄臻亮 ,　张永清(上海交通大学国家模具 CAD工程研究中心 ,上海 2 0 0 0 3 0 )摘　要 :基于模型推理 (MBR)是构建知识系统推理机制的一种方法 ,将该技术集成于通用 CAD设计软件 ,使设计软件具有一定智能 ,提高设计效率 .简述了 MBR的特点 ,并将其与基于规则推理、基于实例推理进行了比较 ,阐述了 MBR技术在注塑模设计中的应用 ,在 Pro E设计平台上构建了 MBR的智能注塑模设计系统 .经工程实践 ,该系统可以有效地提高设计效率筒形件错距旋压的有限元分析及其工艺优化系统翟福宝 ,　李　…     

注塑模结构 CAD 的设计流程与装配模型

文章首先对注塑模结构ＣＡＤ的重要性及尚存在的问题进行分析。接着提出在注塑模ＣＡＤ三维系统的基础上采用“自顶向下”的设计流程,对实现该流程的关键技术进行讨论,提出了塑件骨架构型、模具符号零件、装配模型等概念。此外,还对参数化设计技术在注塑模结构ＣＡＤ柔性化方面的应用进行了讨论。     

精密多腔注塑模CAD/CAE/CAM系统

精密多腔注塑模CAD/CAE/CAM系统集成了注塑模图形输入、结构设计、流道设计、流动及冷却分析软件和数控加工软件,功能全面、实用性强,可广泛应用于彩电、仪表行业.     

滴头腔体的注塑模设计

本文阐述了注塑模设计方法,分析了分型面、浇注系统的设计思路,介绍了模具的工作过程。     

基于UG的现代注塑模CAD系统开发

基于通用的CAD平台UGNX3．0（Unigraphics NX3．0）,在MicrosoftVisual C＋＋6．0环境下利用C和UG／OpenAPI语言,针对厦门某企业注塑模设计的实际要求,为其构建专用、标准的可实现热流道设计的现代注塑模CAD系统总体框架,并研究该系统的设计流程及系统各主要模块的结构及功能,为提高模具设计效率和再设计能力奠定了基础．     

注塑模浇注系统的计算机辅助设计

介绍了塑料注塑模实用浇注系统的计算机辅助设计。使用该软件可设计不同形式的浇注系统。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-