机械CAD尺寸公差的自动查询和公差配合的自动标注

本文用Ｃ语言和ＡｕｔｏＣＡＤ的ＡＤＳ和ＳＱＬ接口，开发研制了在ＡｕｔｏＣＡＤ图形平台下的国标尺寸标注模块。该模块具有使用方便、直观、灵活、用户界面友好等特点，适用于机械ＣＡＤ尺寸公差的自动查询和公差配合的自动标注。     

AutoCAD系统机械图尺寸及公差自动标注功能的开发

本文论述了以微机辅助绘图软件ＡｕｔｏＣＡＤ为图形支撑软件实现机械图尺寸公差自动标注和尺寸标注的程序设计方法。用这种方法设计的程序面向用户，标注参数易于控制，使尺寸公差自动标注成为可能。     

形位公差图样标注的计算机辅助设计

基于图形的ＣＡＤ与数控的ＣＡＤ，以及两者之间衔接过程ＣＡＰ实现方面的研究思想，采用ＡｕｔｏＬＩＳＰ开发语言，在ＡｕｔｏＣＡＤ环境中，开发了国标形位公差的自动标注以及形位公差数据库的维护等功能，有效地实现了机械零件设计中国标形位公差１４类２５种形式的自动标注，该系统界面友好，使用方便。     

AutoCAD尺寸标注技巧

通过分析几例尺寸标注的技巧,探讨如何使ＡｕｔｏＣＡＤ尺寸标注适合我国制图标准和尺寸公差的标注。     

AutoCAD绘图软件常用尺寸标注的优化

基于我国机械制图标准［１］,分析了美国 Ａｕｔｏｄｅｓｋ公司的ＡｕｔｏＣＡＤ通用绘图软件在尺寸标注方面的欠缺,并在 ＡｕｔｏＣＡＤ平台上对常用尺寸标注作了优化,以达到尺寸标注的国标化更具实用性．     

计算机尺寸标注算法的研究

本文归纳了机械制图中各种尺寸标注形式为直线型、角度型、直径型和半径型四种．以形式最为繁杂的直线型尺寸标注为例，研究提出计算机通用尺才标注算法，较好地解决了计算机参数化绘图技术中的瓶颈──尺寸标注问题．并在＂链条少齿差行星减速机的ＣＡＤ＂和＂主轴单元ＣＡＤ＂等攻关项目中验证应用成功．     

计算机辅助设计中的国标实用化新软件

介绍了作者继ＡｕｔｏＧＢＢＺ后研究开发的新版“国标标注软件”ＧＢＢＺ的新功能、新特征、新界面,该软件能依照最新的国家标准及ＣＡＤ通用技术规范,方便迅速高质量地创建初始绘图环境,完成粗糙度、形位公差、基准代号、焊缝符号、技术要求等文字及符号的标注,绘制并填写标题栏、明细表,为工程ＣＡＤ提供了极大的方便．     

机械零件工作图尺寸标注的智能化

本文介绍了机械零件ＣＡＤ中采用人工智能技术实现全部尺寸的自动标注，自动 确定应标注的尺寸及其标注位置；建立了规则库。根据尺寸标注的环境描述，搜索规 则库，得到标注尺寸的对策。以轴、套、齿轮类零件为例，详细介绍了直径尺寸与轴 向尺寸智能化标注的方法。     

面向尺寸标注的多面体机械零件基本结构分析

根据机械零件计算机辅助造系统提供的信息，对机械零件的基本组成、属性及其尺寸标注原理进行了详尽的分析，给出了零件中基本几何特征的尺寸定位原理和方法，建立了相应的尺寸标注基本数据模型，并已在作者开发的机械智能ＣＡＤ系统中实现。     

基于Anto CAD10．0软件开发的常用机械零件CAD系统

以ＡｕｔｏＣＡＤ１０．０为基础软件开发了一套常用机械零件ＣＡＤ系统。该系统借助ＡｕｔｏＬｉｓｐ语言采用图素拼接法和结构变形法对常用的轴类、齿轮类零件进行计算机辅助设计，并能对任意方位的形位公差、粗糙度进行自动标注。该系统采用菜单方式工作，所有的设计和尺寸标注均可通过相应的汉化用户菜单来进行。此系统操作简单，使用方便，可大幅度地提高设计常用机械零件的效率。所生成的图纸符合国家标准，可直接用于实际设计和生产。     

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.     

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.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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…