传动方案设计专家系统的智能模型与关键技术

分析了传动方案设计的特点，探讨了如何利用人工智能理论及专家系统与常规ＣＡＤ技术解决传动方案设计问题。并给出了智能模型的建立及知识表示、约束推理、参数设计、多方案设计与布置设计的原理与方法。     

V带智能CAD系统结构与神经网络应用

结合 Ｖ 带传动智能 Ｃ Ａ Ｄ 系统的总体结构、系统回溯等问题,通过 Ａ Ｒ Ｔ 网络在 Ｖ 带传动智能 Ｃ Ａ Ｄ 系统中的一个具体应用实例,讨论了该系统的结构和网络应用问题     

分布式微系统CAD中三级体系结构实现

在微系统ＣＡＤ研究中，如何开发分立在不同领域的ＣＡＤ功能模块并将其连接成为一个整体，构成系统级的设计工具是一个关键问题。基于Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ两级结构模型的分布式结构向解决这个问题迈出了关键的一步，但仍然存在诸多不足，因此在其基础上提出了采用三级结构的分布式ＣＡＤ新方案。论述了选用该结构的优越性，根据该方案设计了一个微系统ＣＡＤ的系统级软件框架结构。     

齿轮传动智能设计中的知识与数据表示

本文讨论了齿轮传动智能ＣＡＤ系统中知识和数据的混合表示及组织问题，并提出了一种实际的组织结构方案。这种方案可以推广到其它的机械设计智能ＣＡＤ系统中。     

机械传动原理方案设计及其决策支持系统的构造

将专家系统技术与ＣＡＤ技术、模糊理论以及决策支持技术等集为一体，构造了“机械传动系统原理方案设计及其决策支持系统”，较为成功地解决了“机械传动原理方案设计及其决策”这一复杂问题。本文主要介绍了系统的基本组成、结构及开发方式。     

AUTOCAD辅助建筑设计方案三维构思初探

介绍了ＡＵＴＯＣＡＤ辅助建筑方案设计诉基本方法，论述了建筑设计与设计表现之间的辩证关系，并以此为起点，探讨了计算机与建筑方案设计过程后，对提高建筑设计的三维研究与方案表现质量的意义。     

Windows环境下圆锥齿轮传动CAD系统的设计

讨论了结构化分析方法在圆锥齿轮传动ＣＡＤ系统中的应用，介绍了基于Ｗｉｎｄｏｗｓ环境的用户界面设计，建立了以混合离散变量优化方法为基础的圆锥齿轮传动优化数学模型。     

液压系统CAD软件研制的几个问题

液压系统ＣＡＤ软件的研制中，充分考虑液压传动技术的特点。目前的ＣＡＤ软件存在以下不足：不能根据功能要求进行逻辑功能的设计；不能自动生成系统工作原理图；缺乏的设计计算；不能进行系统的辨识及系统间的相互比较。本文以逻辑设计方法对此进行初步分析和探讨，认为上述问题应归结为对液压传动技术的内在逻辑的进一步研究，从而解决这些问题。     

设计型专家系统在模具CAD中的应用

在对工程设计形式特征进行分析的基础上．论述了设计型专家系统的构造和模式， 并将该模式应用于弯管铸造模具ＣＡＤ系统中，实现了模具方案设计、装配图设计和 全部零件工作图的自动设计。这种方法也为其他机械产品的ＣＡＤ提供了值得借鉴的 的经验。     

成套电器面板计算机辅助设计与制造系统

成套电器面板计算机辅助设计与制造系统ＪＤＰ－ＣＡＤＡＭ是一个ＣＡＤ与ＣＡＭ集成数控自动编程系统，在ＣＡＤ部分，利用人工神经网络，输入细表，可以实现面板的自动布置，并自动形成开孔图，在ＣＡＭ部分，读取面板开孔图后，系统自动选择加工刀具和确定加工路线，自动生成ＮＣ程序并用动画模拟的方法校核其正确性，文章在总体概括ＪＤＰ－ＣＡＤＡＭ系统的基础上，重点介绍了数控自动编程部分的功能及实现方法。     

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

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.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

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

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.