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Experimental　Study　on　Heat　Transfer　and　Pressure　Drop　Characteristics　of　Four　Types　of　Plate　Fin－and－TUbe　Heat　Exchanger　Surfaces

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journal of Thermal Science 1994年第1期3卷 34-42页

作者： H.j. Kang W. Li H.Z. Li r.C. Xin W.Q. Tao(School of Energy and Power Engineering, Xi’an jiaotong University, Xi’an, Shaanxi 710049, China) 1. School of Energy and Power Engineering Xi’an Jiaotong University 710049 Xi’an Shaanxi China

In this paper, air side heat transfer and pressure drop characteristics of twelve three-row plate finandtube heat exchanger cores of four types of fin configurations have been experimentally *** heat transfer and friction factor correlations for'the twelve cores are provided in a wide range ofreynolds number. It is found that in the range of reynolds number tested, the Nusselt number of theslotted fin surface is the largest and that of the plain plate fin is the lowest while the Nusselt numbersof two types of wavy fins are somewhere in between.

关键词： plate fin-and-tube exchanger heat transfer and pressure drop characteristics plain plate fin wavy plate fin slotted plate fin

Uncertainty in water resources:introduction to the specia column

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Frontiers of Earth Science 2018年第4期12卷 649-652页

作者： S.r.FASSNACHT r.W.WEBB M.MA ESS-Watershed Science Colorado State UniversityFort CollinsCO 80523-1476USA Cooperative Institute for research in the Atmosphere Fort CollinsCO 80523-1375USA Natural resources Ecology Laboratory Fort CollinsCO 80523-1499USA Institute of Arctic and Alpine research University of Colorado BoulderBoulderCO 80309-0450USA now with Department of Civil Constructionand Environmental EngineeringUniversity of New MexicoAlbuquerqueNM 87131USA research Base of Karst Eco-environments at Nanehuan in Chongqing Ministry of Nature ResourcesSchool of Geographical SciencesSouthwest UniversityChongqing 400715China

Uncertainty is a defining problem in the understanding of earth systems, especially for water resources (Guillaume et al., 2017). The word “uncertainty” can have a variety of meanings (Montanari, 2007; Beven, 2016). Typically, we only understand processes in the confines of laboratory experiments, on a very fine scale in the field, or in vague generalities. This is often the case because the processes are not well understood, or there is not enough data at the appropriate resolution or over a sufficient extent. Scaling issues occur at both spatial and temporal resolution leaving the scientist with imperfect knowledge of a system and poorly defined errors when evaluating it.

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robot-assisted retroperitoneal lymphadenectomy:The state of art

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Asian journal of Urology 2021年第1期8卷 27-37页

作者： Gilberto j.rodrigues Giuliano B.Guglielmetti Marcelo Orvieto Kulthe ramesh Seetharam Bhat Vipul r.Patel rafael F.Coelho Sao Paulo State Cancer Institute University of Sao Paulo School of MedicineSao PauloBrazil Clı´nica Alemana SantiagoChile Department of Urology AdventHealth Global Robotics InstituteCelebrationFLUnited States

Objective:To perform a narrative review about the role of robot-assisted retroperitoneal lymphadenectomy(r-rPLND)in the management of testicular ***:A PubMed search for all relevant publications regarding the r-rPLND series up until August 2019 was *** largest series were identified,and weighted means calculated for outcomes using the number of patients included in each study as the weighting ***:Fifty-six articles of r-rPLND were identified and eight series with more than 10 patients in each were *** weighted mean age was 31.12 years;primary and post chemotherapy r-rPLND were performed in 50.59%and 49.41%of *** clinical stage was I,II and III in 47.20%,39.57%and 13.23%of patients.A modified r-rPLND template was used in 78.02%of patients,while 21.98%underwent bilateral full *** weighted mean node yield,operative time and estimated blood loss were,respectively,22.15 nodes,277.35 min and 131.94 *** weighted mean length of hospital stay was 2 days and antegrade ejaculation was preserved in 92.12%of *** post-operative complications(Clavien III or IV)occurred in 5.34%.Positive pathological nodes were detected in 24.54%,while the recurrence free survival was 95.77%with a follow-up of 21.81 ***:r-rPLND has proven to be a reproducible and safe approach in experienced centers;short-term oncologic outcomes are similar to the open approach with less morbidity and shorter convalescence related to its minimal ***,longer follow-up and new trials comparing head-to-head both techniques are expected.

关键词： Testicular neoplasms Lymphadenectomy robotic surgical procedures

Multiple magnetic transitions and magnetocaloric effect of Tb_(4)Coln alloy

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journal of rare Earths 2023年第11期41卷 1721-1727,I0003页

作者： remya U.D. Arun K. Swathi S. Athul S.r. Andrea Dzubinska Marian reiffers Nagalakshmi r. Intermetallics and Non-linear Optics Laboratory Department of PhysicsNational Institute of TechnologyTiruchirappalli620015India CPM-TIP University Pavol Jozef Safarik04011KošiceSlovakia Faculty of Humanities and Natural Sciences Presov UniversityPresovSlovakia Institute of Experimental Physics SASKosiceSlovakia

We report on the magnetic,magnetocaloric,thermal,and electrical transport properties of Tb_(4)Coln alloy,which crystallizes in two phases,Tb_6Co_(2.1)In_(0.8)(space group Immm)and Tb_(2)In_(0.9)Co_(0.1)(space group P6_(3)/mmc),*** alloy reveals three successive magnetic transitions around T_(1)(163 K),T_(2)(50 K),and T_(3)(29 K),respectively,associated with paramagnetic to ferromagnetic transition and two sequential antiferromagnetic *** low-temperature transition T_(3) follows the first-order magnetic behavior and exhibits the field-induced magnetic ***,T_(2) and T_(1) are found to be second-order in nature which opens a possibility for hysteresis-free magnetocaloric *** magnetocaloric properties are determined using different magnetocaloric figures of merits such as-ΔS_(M),ΔT_(ad).rCP,and TEC(10).Additionally,the universal curve behavior in the isothermal entropy change unveils the variation in critical exponents around T_(1) and T_(2) due to the magnetic inhomogeneity in the ***,the electrical transport properties of the metallic alloy denote the maximum magnetoresistance of-10%around T_(1).

关键词： Multiple magnetic transitions Order of magnetic transition Magnetocaloric effect Magnetoresistance Universal curve behavior rare earths

An Efficient Unsupervised Learning Approach for Detecting Anomaly in Cloud

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Computer Systems Science & Engineering 2023年第4期45卷 149-166页

作者： P.Sherubha S.P.Sasirekha A.Dinesh Kumar Anguraj j.Vakula rani raju Anitha S.Phani Praveen r.Hariharan Krishnan Department of Information Technology Karpagam College of EngineeringCoimbatoreTamilnaduIndia Department of Computer Science and Engineering Karpagam Academy of Higher EducationCoimbatoreTamilnaduIndia Department of Computer Science and Engineering Koneru Lakshmaiah Education FoundationAndhra PradeshIndia Department of MCA CMR Institute of TechnologyBengaluruKarnatakaIndia Department of Computer Science and Engineering Prasad V.Potluri Siddhartha Institute of TechnologyAndhra PradeshIndia Department of Computer Science and Engineering Residency CollegeChennaiIndia

The Cloud system shows its growing functionalities in various industrial *** safety towards data transfer seems to be a threat where Network Intrusion Detection System(NIDS)is measured as an essential element to fulfill ***,Machine Learning(ML)approaches have been used for the construction of intellectual *** IDS are based on ML techniques either as unsupervised or *** supervised learning,NIDS is based on labeled data where it reduces the efficiency of the reduced model to identify attack ***,the unsupervised model fails to provide a satisfactory ***,to boost the functionality of unsupervised learning,an effectual auto-encoder is applied for feature selection to select good ***,the Naïve Bayes classifier is used for classification *** approach exposes the finest generalization ability to train the *** unlabelled data is also used for adoption towards data ***,redundant and noisy samples over the dataset are *** validate the robustness and efficiency of NIDS,the anticipated model is tested over the NSL-KDD *** experimental outcomes demonstrate that the anticipated approach attains superior accuracy with 93%,which is higher compared to j48,AB tree,random Forest(rF),regression Tree(rT),Multi-Layer Perceptrons(MLP),Support Vector Machine(SVM),and ***,False Alarm rate(FAr)and True Positive rate(TPr)of Naive Bayes(NB)is 0.3 and 0.99,*** compared to prevailing techniques,the anticipated approach also delivers promising outcomes.

关键词： Network intrusion detection system feature selection auto-encoder support vector machine(SVM) anomaly

Evolution mechanisms of microstructure and mechanical properties in a friction stir welded ultrahigh-strength quenching and partitioning steel

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journal of Materials Science & Technology 2022年第7期102卷 213-223页

作者： Z.W.Wang j.F.Zhang G.M.Xie L.H.Wu H.Zhang P.Xue D.r.Ni B.L.Xiao Z.Y.Ma Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China State Key Laboratory of rolling and Automation Northeastern UniversityShenyang110819China

Ultrahigh-strength quenching and partitioning(Q&P) steels have attracted strong interests in the auto manufactory,while the comprehensive understanding in the microstructure and mechanical behavior of their welded joints is highly needed to enrich their *** the present work,it is designed to make an insight into these imperative *** strength Q&P 1180 steel joints to parent metal were successfully fabricated via friction stir welding(FSW) technique under different parameters. Apparent hardening and softening were observed in stir zone(SZ) and heat-affected zone(HAZ) respectively,whose microstructures strongly depended on the peak temperature and cooling rate during *** formation of fresh martensite was the main mechanism for the SZ hardening,while the decomposition of metastable phases played key roles in the microhardness drop of the HAZ.A heat source zone-isothermal phase transition layer model was proposed to clarify the impregnability of the joint strength under parameter *** dual-phase structure,nano-carbide particles,tempered initial martensite,and ultrafine-grained ferrite synergistically improved the strain hardening ability of the HAZ,which eventually resulted in the equal strength FSW joints.

关键词： Ultrahigh-strength Q&P steel Friction stir welding Microstructure Mechanical property Strain hardening

回顾印度城市的演变——城市规划既要研究“过去”又要展望“未来”

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国际城市规划 2009年第S1期24卷 100-103页

作者： j.r.Bhalla 韩玉泽

本文介绍印度的城市——具有时代特征的三个组成部分。作者认为人类的聚居形式是由社会形成的,各个国家、各个时期显示了相对的自治性,这种自治性就是今天和过去的一个反映。因此,城市规划既要研究过去,又要展望未来。作者还提出了在规... 详细信息

本文介绍印度的城市——具有时代特征的三个组成部分。作者认为人类的聚居形式是由社会形成的,各个国家、各个时期显示了相对的自治性,这种自治性就是今天和过去的一个反映。因此,城市规划既要研究过去,又要展望未来。作者还提出了在规划实践中必需涉及和解决的一些重要问题。

关键词：城市规划古代城市印度时代特征自治性展望居民住宅聚居形式建筑师发展中国家

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板块构造启动的时间和机制:理论和经验探索

科学通报 2007年第5期52卷 489-501页

作者： r. j. Stern 唐俊(翻译) 牛耀龄(校对) Gcoscicnces Department University of Texas at Dallas Box 830688 Richardson TX 75083-0688 USA. 不详

板块构造是指位于对流地幔圈层之上的岩石圈的水平运动,主要由岩石圈在俯冲带的下沉作用所致.板块构造是一个典型的、非平衡复杂体系的自组系统(selforganizing,far from equilibrium complex system,SOFFECS),其驱动力主要来自热边界层... 详细信息

板块构造是指位于对流地幔圈层之上的岩石圈的水平运动,主要由岩石圈在俯冲带的下沉作用所致.板块构造是一个典型的、非平衡复杂体系的自组系统(selforganizing,far from equilibrium complex system,SOFFECS),其驱动力主要来自热边界层(岩石圈)的反向浮力,同时又受控于变形岩石圈与下覆粘性软流圈地幔的耗散作用.在太阳系内侧5个硅酸质行星中,板块构造仅发育于地球,这表明板块构造是硅酸质行星不太常见的一种热散逸方式.目前还不清楚这种构造活动和热散逸方式在地球上是从何时开始的.所有的硅酸质行星在形成初期可能都经历过一次短暂的岩浆海阶段.行星固结后,静止盖层模式是行星冷却的共同途径,即行星表面形成了一个不易活动的固化盖层,此时内部的热量只能通过拆沉作用、热点火山作用和岩浆浅部侵位等方式进行逃逸.由于地球早期温度较高,通过减压熔融形成的岩石圈结构不同于现代岩石圈,即地球早期岩石圈由厚的洋壳和薄的岩石圈地幔构成.这种岩石圈要产生反向浮力需要非常长的时间,因此地球早期即便有板块构造存在,其规模也比较零星.只有当地球冷却到一定程度,扩张中脊下部减压熔融形成薄的洋壳且大洋岩石圈只需几十个百万年就可以产生反向浮力时,才能形成与现今风格相似的、可持续性的板块构造.板块构造启动时间的认识最终取决于人们对相关地质记录(事件)的研究成果.板块构造的判别依据包括蛇绿岩、蓝片岩、超高压变质带、榴辉岩、被动大陆边缘、转换断层、指示克拉通陆块移动轨迹的古地磁研究以及岩浆岩地球化学和同位素构造判别等等.对地质记录的解释必须综合各方面的信息.本人认为现存的地质事件记录了地球构造随时间演化的过程,即太古代时期构造和岩浆活动剧烈,大约在1.9Ga时开始出现近似的板块构造,在新元古代才开始出现与现代相似的、可持续的、具有深俯冲和板片拖曳特性的板块构造.

关键词：板块构造俯冲前寒武纪地球动力学

regulation of cell adhesion in the testis： a new role for p73

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Asian journal of Andrology 2014年第6期16卷 799-800页

作者： Helen E Abud Gary r Hime Department of Anatomy and Developmental Biology Monash University Clayton VIC 3800 Australia Department of Anatomy and Neuroscience University of Melbourne Parkville VIC 3010Australia.

The dramatic changes that male germ cells in the adult testis undergo in gene expression profile and morphology as they transition from spermatogonial stem cells through to mature spermatozoa is dependent upon their association with Sertoli cells. Sertoli cells are crucial for survival and maturation of male germ cells. Two recent papers, Holembowski et al？ and Inoue et a13 have described a surprising role for the p53 family member, p73, in regulation of germ cell-Sertoli cell adhesion.

关键词： TUMOr-SUPPrESSOr P63 SPErMATOGENESIS TAP73 DEATH P53