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Speed,Speed Factor and Power Input of Different Designs of Diffusion Pumps,and Remarks on Measurements of Speed

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真空 2005年第6期42卷 9-15页

作者： t.l.Ho Norman Bridge laboratory of Physics California Institute of Technology

编者按:国际公认并广泛使用的何氏系数是真空术语中以中国人姓氏命名的系数.何增禄先生(1898--1979-05-12)是我国著名的物理学家、教育家、清华大学著名教授(见杂志1979年第三期第一页前).下面转载的论文是何增禄先生1932年在美国工作... 详细信息

编者按:国际公认并广泛使用的何氏系数是真空术语中以中国人姓氏命名的系数.何增禄先生(1898--1979-05-12)是我国著名的物理学家、教育家、清华大学著名教授(见杂志1979年第三期第一页前).下面转载的论文是何增禄先生1932年在美国工作时发表的论文(Physics Volume 2 P386～395 may 1932).这篇在国际上很有影响、曾被很多国家用多种文字转载过的学术论文,我国65岁以下的科技工作者中极少有人读过原文.为纪念何增禄先生并配合发表评述文章,特全文转载,以供读者学习.

关键词：速度因素扩散性速度测量何氏系数真空技术

1976至1980年苏联国防经费的计划增长

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现代防御技术 1979年第5期 19-24页

作者： t.l.威廉 ,胡遵乾

作者t.l.威廉是一位关于苏联军事和经济事务的专家。他是华盛顿大学的毕业生,曾在哥伦比亚大学作毕业设计。他1951年至1964年在中央情报局,1964年至1972年在史坦费德研究院工作,后来到几家联合公司和私营企业当顾问。 ... 详细信息

作者t.l.威廉是一位关于苏联军事和经济事务的专家。他是华盛顿大学的毕业生,曾在哥伦比亚大学作毕业设计。他1951年至1964年在中央情报局,1964年至1972年在史坦费德研究院工作,后来到几家联合公司和私营企业当顾问。简述苏联的国防经费,是一个有疑问的和争论的问题。即使中央情报局近来使它的估算数增加了一倍,新的估算,在苏联国防费用的数值和增长率上,仍然是没有充分反映实情。然而,苏联现时的经费和将来计划的适当的近似值,可以从日常所公布的数据中推导出来。计划的增长,可以从国民收入分配的数据和采购计划的支出额这两方面进行估算。实际费用的

关键词：苏联苏维埃社会主义共和国联盟国民生产总值国民经济总产值财政管理国防支出国防开支财政支出国民收入国民经济净产值经济收入近似值经费

Immunohistochemical study on distribution of endocrine cells in gastrointestinal tract of flower fish (Pseudophoxinus ant.l.ae)

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World Journal of Gastroenterology 2006年第42期12卷 6874-6878页

作者： Kenan lnar Nurgül ■enol M Rü■tü zen Department of Biology Süleyman Demirel University Isparta 32260 Turkey

AIM： to detect distribution and relative frequency of endocrine cells in gastrointestinal tract of flower fish （Pseudophoxinus ant.l.ae）. MEtHODS： the intestinal tract of flower fish was divided into four portions from proximal to dist.l. the enlarged area after oesophagus and anterior, middle and posterior intestine. Immunohistochemical method using the peroxidase anti-peroxidase complex was employed. All antisera between four portions of flower fish were compared using ANOVA. RESUltS： Eleven types of gut endocrine cells were determined; they were immunoreactive for calcitonin gene related peptide, substance P, vasoactive intestinal peptide, bombesin, somatostatin-14, secretin, trkA, trkB, trkC, neurotensin, neuropeptide Y, which were found in almost all portions of the gastrointestinal tract. CONClUSION： the regional frequency of immunoreactive distribution and relative cells in the flower fish, Pseudophoxinus ant.l.ae, are essentially similar to those of other fish.

关键词： Flower fish Gastrointestinal tract Immunoreactive cells Pseudophoxinus ant.l.ae

Effect of high anodic polarization on the passive layer properties of superduplex stainless steel friction stir welds at different chloride electrolyte pH values and temperatures

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International Journal of Minerals,Met.l.urgy and Materials 2019年第6期26卷 710-721页

作者： l.A.Santa-Cruz G.Machado A.A.Vicente t.F.C.Hermenegildo t.F.A.Santos Department of Mechanical Engineering Universidade Federal de PernambucoAv.da Arquiteturas/n50740-550RecifePEBrazil Center of Nanotechnology Centro de Tecnologias Estratégicas do NordesteCETENERecifePEBrazil Department of Chemical Engineering Universidade de Sao PauloSao PauloSPBrazil

the conditions used for friction stir welding of duplex stainless steels determine the resulting mechanical and corrosion performance of the *** study investigates the corrosion resistance of UNS S32750 and S32760 superduplex stainless steels(SDSSs)joined by friction stir welding,employing cyclic polarization,Mott–Schottky,and microscopy techniques for *** microscopy images indicated the presence of a deleterious intermet.l.ic phase after electrolytic etching of S32760,as well as decreased corrosion *** presence of molybdenum in the steels promoted better passive behavior at.l.w *** Mott–Schottky curves revealed p-n heterojunction behavior of the passive *** acquired after the polarization test by scanning electron microscopy showed higher passivation propensity with increases of temperature and pH.

关键词： superduplex stainless steel friction stir welding corrosion resistance cyclic polarization Mott–Schottky

the Potential Contribution of Subsurface Drip Irrigation to Water-Saving Agriculture in the Western USA

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Agricultural Sciences in China 2009年第7期8卷 850-854页

作者： t.l.thompson PANG Huan-cheng lI Yu-yi Department of Plant and Soil Science Texas Tech University Lubbock TX 79409 USA Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences (CAAS) Beijing 100081 P. R. China

Water shortages within the western USA are resulting in the adoption of water-saving agricultural practices within this region. Among the many possible methods for saving water in agriculture, the adoption of subsurface drip irrigation （SDI） provides a potential solution to the problem of low water use efficiency. Other advantages of SDI include reduced NO3 leaching compared to surface irrigation, higher yields, a dry soil surface for improved weed control, better crop health, and harvest flexibility for many specialty crops. the use of SDI also allows the virtual elimination of crop water stress, the ability to apply water and nutrients to the most active part of the root zone, protection of drip lines from damage due to cultivation and t.l.age, and the ability to irrigate with wastewater while preventing human contact. Yet, SDI is used only on a minority of cropland in the arid western USA. Reasons for the limited adoption of SDI include the high initial capit.l.investment required, the need for intensive management, and the urbanization that is rapidly consuming farmland in parts of the western USA. the contributions of SDI to increasing yield, quality, and water use efficiency have been demonstrated. the two major barriers to SDI sustainability in arid regions are economics （i.e., paying for the SDI system）, including the high cost of inst.l.ation; and salt accumulation, which requires periodic leaching, specialized t.l.age methods, or transplanting of seedlings rather than direct-seeding. We will review advances in irrigation management with SDI.

关键词： subsurface drip irrigation (SDI) water-saving agriculture western USA

ANAlYSIS OF tHE DESIGN PROCESS OF GREEN CHIlDREN’S HOSPIt.l.:Focus on Process Modeling and lessons learned

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Journal of Green Building 2009年第1期4卷 121-134页

作者： Bilec,M.M. Ries,R.J. Needy,K.l. Gokhan,M. Phelps,A.F. Enache-Pommer,E. Horman,M.J. lit.l.,S.E. Powers,t.l. McGregor,E. Sheane,C. Dept.Civil and Environment.l.Engineering Univ.of Pittsburgh1121 Benedum HallPittsburghPA 15261 M.E.Rinker School of Building Construction University of FloridaRNK 304Box 115703GainesvilleFL 32611-5703 Industrial Engineering University of Arkansas4207 Bell Engineering CenterFayettevilleAR 72701 Demandtech Inc.San Carlos1 Circle Star WaySuite 200San CarlosCA 94070 Dept.Architectural Engineering Pennsylvania State Univ104 Engineering Unit AUniversity ParkPA 16802 不详 AIA

Healthcare facilities are among the most complicated facilities to plan,design,construct and operate.A new breed of hospit.l. is considering the impact of the built environment on healthcare worker productivity and patient recovery in their design,construction,and operation.A crucial subset of healthcare facilities are children’s hospit.l. where the consequences of poor building system design and performance have the potential to seriously impact young lives with compromised *** facilities are not always pursued:they are perceived as difficult to build and costing more than equivalent conventional *** study explored the design process of the Children’s Hospit.l.of Pittsburgh of the University of Pittsburgh Medical Center(UPMC)and Penn State’s Hershey Medical Center Children’s Hospit.l.to understand the critical steps and processes for green children’s hospit.l.*** a series of process maps that identify the key characteristics in the complex design requirements of a green children’s hospit.l.this paper reveals the importance of design process to design *** broadly,this research will help future project teams meet the complex design requirements of green children’s hospit.l..

关键词： sustainability healthcare design and construction process

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当今的船用泵和船用阀

机电设备 1992年第3期9卷 34-39页

作者： t.l.约翰逊吴仁荣

在舰船上,船用泵和船用阀以及连通管路所组成的流体输送系统是保证其生命力的动脉和有效运行的关键。作者以广博的知识和丰富的经验论述了在当今船舶尤其是军用舰艇上船用泵和船用阀的应用和发展情况,介绍了美国戴维泰勒研究中心在标准... 详细信息

在舰船上,船用泵和船用阀以及连通管路所组成的流体输送系统是保证其生命力的动脉和有效运行的关键。作者以广博的知识和丰富的经验论述了在当今船舶尤其是军用舰艇上船用泵和船用阀的应用和发展情况,介绍了美国戴维泰勒研究中心在标准化和材料选用方面所开展的研究工作和所取得的成效,

关键词：船舶泵阀

Effect of training on two-way Shape Memory Effect and Its Stability in a ti-Ni-Hf High temperature Shape Memory Alloy

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Journal of Materials Science & technology 2003年第6期19卷 590-592页

作者： XianglongMENG WeiCAI K.t.l.U l.M.ZHOU lianchengZHAO SchoolofMaterialsScience&Engineering HarbinInstituteofTechnologyHarbin150001China DepartmentofMechanicalEngineering TheHongKongPolytechnicUniversityHungHomKowloonHongKongChina

the Effect of the thermal cycling training under constant strain on the two-way shape memory effect (tWSME) in a ti36l\li49Hf15 high temperature shape memory alloy (SMA) has been investigated by bending tests. the results indicated that the training procedure is beneficial to get the better tWSME. the two-way shape memory strain increases with increasing the training strain. And it decreases with increasing the training temperature. the tWSME obtained in the present alloy shows poorer stability compared with that obtained in the tiNi alloys.

关键词： tiNiHf alloy High temperature shape memory alloy two-way shape memory effect training

Impact of lanthanum on the modification of HfO_2 films structure

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Journal of Rare Earths 2015年第8期33卷 857-862页

作者： t.P.Smirnova l.V.Yakovkina V.O.Borisov Nikolaev Institute of Inorganic Chemistry SB RAS

laxHf1-xOy thin films with various concentrations of la, homogeneous and nonhomogeneous distributions of elements throughout the films thickness was purposefully grown by CVD. the composition of the films and their chemical structures were characterized throughout the films thickness by X-ray photoelectron spectroscopy （XPS） and energy-dispersive X-ray spectrometry （EDXA）. A full picture of the film cryst.l.inity was provided by the combination of grazing incidence X-ray diffraction （GIXRD） synchrotron radiation （SR） and high resolution transmission electron microscopy （HR tEM）. It was shown that.l. acted as ＂molar volume modulator＂ and stabilized the nonequilibrium at t≤1300 ℃ cubic phases. the samples with la content in range of 7 at.%〈Cla〈22 at.% were materials with fluorite-type （Fm-3m） structure. the pyroehlore phase formation was observed at -18 at.% la content. the correlation between the la-doped content and the films microstructure was revealed.

关键词： Hf1-xlaxOy films solid solutions X-ray diffraction microstructure rare earths