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1.
介绍了C语言与AutoCAD的接口,应用程序中函数的定义、调用、参数传递及接口的具体实现方法,并提出一些共同存在的问题实现了CAD/CAPP集成中CAD系统与AutoCAD的连接,同时也实现了参数化作图  相似文献   

2.
基于流行的AutoCAD软件,应用ADS及C语言编程,设计开发了一个通用机械零部件CAD系统,实现了常用机械零部件的设计、计算和参数化绘图等该系统界面友好,开放性好,便于进一步开发和完善,达到了实用要求  相似文献   

3.
分析和比较MRA 和CDFI诊断颈动脉狭窄的准确性,评估MRA 作为颈动脉影象检查的诊断价值.35 例颈动脉MRA 全部在Siemens Magnetom Impact 1 .0 磁共振机器上扫描,MRA扫描序列为2 维时间飞跃技术颈动脉狭窄均经CDFI确诊CDFI用Acuson128 彩色双功能多普勒诊断仪MRA 清晰地显示正常颈动脉的颈内动脉、颈外动脉及颈动脉分叉轻度颈动脉狭窄MRA 表现为沿血管壁的信号丢失血流信号中断是颈动脉狭窄的特征,中度颈动脉狭窄伴有狭窄后扩张,重度颈动脉狭窄则狭窄后血管细窄颈动脉血流消失并无血流重现是血管闭塞特异征象MRA 分级颈动脉狭窄程度和CDFI一致性良好MRA 评价颈动脉非常有价值,是诊断颈动脉狭窄的一种有特征性的新方法  相似文献   

4.
探讨不同途径给表阿霉素(EPI)的优劣和血液灌流(DHP)对EPI的吸附能力。方法:观察肝癌病人肝动脉和外周静脉持续输注EPI后外周血浆EPI浓度的改变,并应用DAC-resinDHP吸附EPI的临床研究。结果:肝动脉给药能降低外周血浆EPI浓度(P<005)及血浆高峰浓度(P<0005),而两组AUC的差别不明显(1∶105)。DAC-resinDHP对EPI有明显吸附性能,吸附率达67%。结论:局部给抗癌药优于全身给药,DAC-resinDHP对EPI有明显吸附性能  相似文献   

5.
应用TURBOC语言研制了在UCDOS支持下的供电工程CAD软件的主控程序,为供用电工程CAD的开发提供了友善的工作平台  相似文献   

6.
基于 Auto C A D R14 软件平台,应用 Object A R X 与 Visual C++ 50 语言,研制和开发了一个水工 C A D 专用图形库该系统包括绘图环境设置、水工图形库制作、坝体绘制、水工专用标注、水工专用填充、水工专用线型、水工专用表格、可视化编辑等等该系统使用方便,并能进行进一步的开发和扩展  相似文献   

7.
以市售鱼为原料,进行其高温激活蛋白酶(HTAP)的提取纯化通过抽提、高速离心分离、DEAE-TOYOPEARL650M离子交换色谱、SEPHACRYLS200凝胶过滤等方法,把HTAP从鱼中分离提取出来运用SDS-聚丙烯酰胺凝胶电泳(SDS-PAGE)法对分离提纯的HTAP纯度进行鉴定,并通过此法测出了该HTAP的分子量为39000  相似文献   

8.
目的:观察当归注射液对平滑肌细胞( S M C) 中增殖细胞核抗原( P C N A) 表达的影响。方法:用免疫组织化学 L S A B 法检测培养的兔主动脉 S M C 中 P C N A 的表达,同时测定培养液中超氧化物歧化酶( S O D) 、脂质过氧化物( L P O) 、前列环素( P G I2) 及环磷酸腺苷(c A M P) 的含量。结果:当归注射液能增加 S O D 活性,降低 L P O 和升高 P G I2 、c A M P 水平,抑制 S M C 中 P C N A 的表达( P< 005 ~001) 。结论:当归有抑制 S M C 增殖的作用。  相似文献   

9.
母线槽是现代电力传输设备,遍布于高层建筑和工矿企业的输配电系统中,其空间布置图必须绘制成三维图形,手工绘图较为困难为此我们专门研制了一个母线布置CAD系统—AutoBUS,较好地解决了这个问题该系统是一个以规则库为基础的、以搜索算法为核心的高度智能化的CAD系统,本文介绍该系统的总体设计思想和主要功能  相似文献   

10.
5种新分离细菌的分子鉴定及分类   总被引:5,自引:0,他引:5  
测定和比较了5种新分离细菌的16SrDNA序列,并对其进行分子鉴定和分类.结果表明:F5771和A5608为棒杆菌属(Corynebacterium)的2个新种;LCDC89055是1种放线菌,与Actinomycespyogenes遗传距离较近;而LCDC87080和CDCgroupANF1like则分别为Aneui和Turicelaotitidis菌的不同菌株.  相似文献   

11.
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.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
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.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
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.  相似文献   

14.
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.  相似文献   

15.
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。  相似文献   

16.
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.  相似文献   

17.
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.  相似文献   

18.
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-  相似文献   

19.
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-  相似文献   

20.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

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