用半波带法研究夫琅和费单缝衍射

用半波带法研究夫琅和费单缝衍射王红梅１＊黄琳１王智民２（１陕西师范大学物理学系，２陕西师范大学电化教育系，西安７１００６２；第一作者，女，４１岁，教师）现行普通物理光学教材在处理菲涅耳衍射问题时通常采用半波带法，处理夫琅和费单缝衍射，则直接求解惠更斯...     

地质样品中微量锑的树脂相分光光度法测定研究

地质样品中微量锑的树脂相分光光度法测定研究马美玲１杨胜科１耿征２（１西安地质学院应用化学系，西安７１００５４；２陕西师范大学化学系，西安７１００６２；第一作者，女，３４岁，讲师）树脂相分光光度法近年来已有文献报道［１，２］，利用显色树脂相测定，使分离...     

长期接触有机溶剂的人群O2水平与SOD活性的变化

长期接触有机溶剂的人群Ｏ－２水平与ＳＯＤ活性的变化朱晓明１富晖２翁小融３（１陕西师范大学医院，西安７１００６２；２西安石油勘探仪器总厂，西安７１００６１；３西安医科大学，西安７１００６１；第一作者，女，５０岁，副主任医师）以超氧化物歧化酶（ＳＯＤ）作...     

直流电场处理对油松种子萌发的影响

直流电场处理对油松种子萌发的影响杨建雄１佘小平１桂智彬２乔立民２（１陕西师范大学生命科学学院，西安７１００６２；２西安电子科技大学微电子研究所，西安７１００７１；第一作者，男，４２岁，副教授）早在１９６６年，Ｓｉｄａｗａｙ［１］就电场对种子萌发的影响...     

全息正弦式波带片特性研究

本文主要对全息正弦式波带片的形成及成像特性进行了详细的理论分析，并把它与传统的菲氏波带片及几何光学透镜作比较研究，从中获得正弦式波带片的焦距公式；ｆ＝λ１α／λ２。     

光学微分与光学相减

提出了光学微分的新方法,离焦像与准确像之间得到二阶光学微分,并分别对强度微分及振幅微分作了讨论。     

由取代丙氨酸合成的光学活性β—氨基醇

有竽前手性酮立体选择性还原一种新催化剂，光学活性β－氨基醇（Ｓ）－２－氨基－３－（２，５－二甲苯基）－１，１－二苯基－１－丙醇（７）由（Ｓ）－Ｎ－乙酰基－３－（２，５－二甲苯基）－１－丙氨酸制得，丙氨酸衍生物的丙二酸酯法合成，然后经过酶拆分得到。     

超声对人红白血病细胞系K_(562)作用的研究

超声对人红白血病细胞系Ｋ５６２作用的研究齐浩１马玉英２谭声江１宋存牛２（１陕西师范大学生命科学学院，西安７１００６２；２陕西师范大学应用声学研究所，西安７１００６２；第一作者，女，４２岁，讲师）光动力学（ＰＤＴ）问世以来，实验已证实超声（ＵＳ）也可激...     

配有半导体温度传感器的数字测温电路

配有半导体温度传感器的数字测温电路孙中禹１余炳绪１李树新２（１空军电讯工程学院实验中心，西安７１００７７；２陕西电视台，西安７１００５４；第一作者，男，３４岁，讲师）常用的测温元件有热偶、热敏电阻和半导体温度传感器等．热电偶具有较高的稳定性，但热电转...     

含有CPP32基因的逆转录病毒载体的构建

含有ＣＰＰ３２基因的逆转录病毒载体的构建姚潇１叶棋浓２王恒梁２袁仕取１刘全宏１苏国富２（１陕西师范大学生命科学学院，西安７１００６２；２军事医学科学学院生物工程研究所，北京１０００７１；第一作者，男，３０岁，助教）ＣＰＰ３２（ＣｙｓｔｅｉｎｅＰｒｏｔ...     

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.     

An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

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.     

大肠杆菌pheA与tyrB基因的克隆与串联表达

为探讨用基因工程的手段改良苯丙氨酸的发酵菌株，采用聚合酶链反应（ＰＣＲ）的方法，从大肠杆菌总ＤＮＡ中克隆得到了编码苯丙氨酸合成途中的两个关键酶基因－即分枝酸变位酶（ＣＭ）／预苯酸脱水酶（ＰＤ）基因ｐｈｅＡ与苯丙氨酸转氨酶（ＰＡＴ）基因ｔｙｒＢ，在大肠杆菌中进行了这两个基因的单个和串联表达。ｐｈｅＡ和ｔｙｒＢ基因分别都能在λ噬菌体的ＰＲ启动子之后得到较大量的表达，在ＳＤＳ－ＰＡＧＥ上出现清晰的条带，     

四川溲疏属的分类研究 （Ⅱ）：种的简介及新分类群

介绍了四川溲疏属植物20种,5变种及1栽培变型,每种均有文献考证、学名订正、特征集要及产地和生境,新分类群D.leiboeneie P.He et L.C.Hu, D.piloea var.longiloba P.He et L.C.Hu,D.jinyangensis P.He eL L.C.Hu及D.longifolia var.deneitomentosa P.He et L.C.Hu均有详细拉丁文描述并附模式标本照片,还记录了两个四川省新分布种:D.bodiaieri Rehd.,D.rehderiana C.K.Schn.,对伞花亚组Subsect Cymosae Rehd.中建立的新系(Ser.Multiradiatae P.He,Ser.Pauciradiatae P.He)作了拉丁文补充描述。     

在Java技术之Servlet中实现文件的上载功能

Java这门编程语言以及相关技术的使用得到快速的增长;现在大约有700多万台计算机正在运行Java应用程序,有近100万的Java开发人员,世界上所有的企业中,几乎有一半正在开发 Java应用程序。Java成功的理由是很自然的,Java是真正与平台无关的,它是适合于任何操作系统的一种通用的编程语言;Java是完全面向对象的,这在软件工程和组件技术方面有了很大的进步;Java的安全模型是成熟的,这与其他容易感染病毒的模型系统形成了鲜明的对比。     

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.     

采用有限差分方法求解固体弹性应力场(英文)

为了采用全有限差分方法进行涡轮气热弹耦合计算,研究了固体弹性应力场计算的物理模型,给出了任意曲线坐标系下的控制方程.同时研究了定常问题的有限差分求解方法和边界条件的给定,编制了定常问题的应力场求解程序;并通过对具有解析解的受集中载荷的悬臂梁和一端受径向集中力的曲梁进行数值计算来验证该固体弹性应力场的求解方法.结果表明,边界条件的二阶精度处理的格式所得结果与解析解数据吻合得较好,而一阶精度格式结果与解析解有较大的误差.     

中国阳蝇属六异名记述(双翅目:蝇科)

阳蝇属是蝇科最大的属之一,迄今全世界已知阳蝇属约666种,分布于世界各大地理区。近年来对阳蝇属种团和类群的研究,发现在我国阳蝇属中存在一些异名问题。在我国阳蝇属已知226种中,发现小兴安阳蝇(Helina xiaoxinganna Xue,2001)、茂县阳蝇(Helina maoxianica Feng,2008)、后曲阳蝇(Helina postiflexa Xue,Feng& Tong,2008)、团宝山阳蝇(Helina tuanbaoshanica Feng,2007)、兴凯阳蝇(Helina xingkaihuica Feng& Ye,2007)和错那阳蝇(Helinacuonaica Feng&Xu,2008)等6个种存在同物异名问题,并根据模式标本及原始文献,指出了同物异名的理由,明确给予了订正。     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to