基于 NURBS 的多面体圆角过渡算法

多面体的圆角过渡是ＣＡＤ／ＣＡＭ中的一种重要操作。该文研究了多面体的边端点附近的情形，给出了直接计算边过渡曲面ＮＵＲＢＳ控制点的算法，避免了复杂的求交、分类和裁剪；分析了任意三边构成的角点的过渡曲面形状，给出了各种情形下角点过渡曲面的非均匀有理Ｂ样条（ＮＵＲＢＳ）表示的生成算法；针对产品造型中常见的情形给出了快速算法。文中算法生成的过渡曲面都是ＮＵＲＢＳ曲面，它们与其基曲面间以及沿边过渡曲面与角过渡曲面的公共边界均满足Ｇ１连续。     

在杂合启动子控制下乙肝病毒表面抗原SA—28融合基因在酵母中的表达？…

采用酵母杂合启动子ＰＡＤＨＺ－ＣＵＰ１或ＰＡＤＨＺ－ＧＡＰＤＨ及终止子ＴＡＤＨ１,构建了一系列酵母表达载体。在这些表达载体中插入乙肝有面抗原Ｓ－ｐｒｅＳ１融合基因ＳＡ－２８后将含乙肝病毒表面抗原的表达单元克隆至高稳定质粒ＰＨＣ１１的ＢａｍＨⅠ位点。     

1，4－双（1′－苯基－3′－甲基－5′－氧代吡唑－4′－基）丁二酮－〔1，4〕萃取稀土的研究

在硝酸介质中，研究了１，４－双（１′－苯基－３′－甲基－５′－氧代吡唑－４′－基）丁二酮－〔１，４〕（Ｈ２ＢＰＭＰＢＤ，记为Ｈ２Ａ）的氯仿溶液对ＲＥ３＋（ＲＥ＝Ｌａ，Ｐｒ，Ｎｄ，Ｇｄ，Ｙ，Ｄｙ）离子的萃取平衡．用斜率法和等摩尔系列法确定了萃合物的组成为ＲＥＢＰＭＰＢＤ·ＨＢＰＭＰＢＤ，测定了其半萃取ｐＨ值和萃合反应的热力学函数     

绿丰收对小白菜生长及产量的影响(简报)

绿丰收对小白菜生长及产量的影响（简报）朱京涛１黄云祥２（１河北农业技术师范学院园艺系，２黄腐酸研究所，昌黎，０６６６００）ＴＨＥＩＮＦＬＵＥＮＣＥＯＦＬＵＦＥＮＧＳＨＯＵＯＮＴＨＥＧＲＯＷＴＨＡＮＤＹＩＥＬＤＯＦＳＭＡＬＬＣＨＩＮＥＳＥＣＡＢＢＡＧＥ...     

两种抗原不同方法检测猕猴B病毒抗体的初步探讨

分别以人单纯疱疹病毒１型（ＨＳＶ－１）作抗原，采用玻片免疫酶法（ＥＩＡ）和以Ｂ病毒作抗原，采用ＤＩＡｄｏｔ法检测了６０份猕猴血清中的Ｂ病毒抗体。结果ＥＩＡ法检测的阳性率为５％，ＤＩＡｄｏｔ法检测的阳性率为１０％，两者的符合率为９５％。这一结果可为猕猴生产和出口单位提供参考。     

大鼠游泳耐力训练血清CPK,LDH,UCr水平变化的研究

采用ＢＥＣＫＭＡＮ－４２型自动生化分析仪和ＷＦＺ８００－Ｄ３型紫外可见分光光度计，测定了不同游泳耐力训练的ＳＤ大鼠血清肌酸磷酸激酶（ＣＰＫ）、乳酸脱氢酶（ＬＤＨ）和尿肌酐（ＵＣｒ）值变化．结果表明，运动训练后ＬＤＨ，ＣＰＫ和ＵＣｒ值呈升高趋势，超运动负荷可导致ＬＤＨ，ＣＰＫ大量逸出，血清酶活性升高；骨骼肌收缩蛋白分解代谢加强，ＵＣｒ排出量增加，机体出现运动性疲劳．故采用血清ＬＤＨ，ＣＰＫ活性结合ＵＣｒ值等指标综合监测运动疲劳，具有一定的生物化学意义     

拟鞅变换与UMD空间

拟鞅变换与ＵＭＤ空间梁汉营，牛司丽（河南师范大学数学系，４５３００２，新乡）（河南机电专科学校）本文给出了拟鞅变换的若干不等式对ＵＭＤ空间的刻划，文中（｜Ｂ，‖·‖）表示Ｂａｎａｃｈ空间，设（Ω，∑，Ｐ）是概率空间，（Ｂｎ，ｎ≥１）是∑的递增子σ代数...     

异构计算系统的表调度式任务映射与调度算法

研究了在异构计算系统（ＨＣＳ）中利用表调度式算法进行任务映射与调度．给出两种异构静态优先级表调度式任务映射算法（ＨＳＰ和ＧＨＳＰ）,以及一种异构动态优先级表调度式任务映射算法（ＢＨＤＰ）．实验结果表明,ＧＨＳＰ算法对于粗中粒度ＤＡＧ的调度效果稍好于ＨＳＰ算法,而ＢＨＤＰ算法对于粗粒度和细粒度ＤＡＧ的调度效果均明显优于ＨＳＰ和ＧＨＳＰ算法．     

鼠脑钠离子通道IS4片段溶液构象的NMR研究

应用２Ｄ ＾１Ｈ ＮＭＲ技术确定了合成多肽ＩＳ４的溶液构象，利用２Ｄ ＤＱＦ－ＣＯＳＹ，ＴＯＣＳＹ和ＮＯＥＳＹ实验，对ＩＳ４的＾１Ｈ谱进行了完全的指认，ＮＯＥＳＹ谱相关峰的积分被应用于结构计算，应用ＭＡＲＤＩＧＲＡＳ程序可以产生比较精确的质子－质子之间的距离约束。在应用距离几何程序ＤＩＡＮＡ计算时利用由ＭＡＲＤＩＧＲＡＳ产生的距离约束，加上二面角的约束，结果得到５个重叠得比较好的结构，最后对这５个     

Banach空间中线性系统范数约束可达性

研究无穷维控制系统，范数约束可达性，其中ｘ∈Ｘ，１≤ｐ≤∞，Ｘ，Ｕ是自反Ｂａｎａｃｈ空间．文中提出一致范数约束可达性概念，得到充分必要条件．     

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.     

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.     

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.     

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.     

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.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

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