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Experimental and numerical analysis of compressible two-phase flows in a shock tube

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International Journal of Modeling, Simulation, and Scientific Computing 2015年第3期6卷 35-53页

作者： J.Bruce ralphin rose S.Dhanalakshmi g.r.jinu Department of Aeronautical Engineering regional Centre of Anna University Tirunelveli 627007 India Department of Mechanical Engineering regional Centre of Anna University Tirunelveli 627007 India Department of Mechanical Engineering University College of Engineering Nagercoil 629004 India

The comparative study on seven equation models with two different six equations modelfor compressible two-phase flow analysis is proposed. The seven equations model isderived for compressible two-phase flow that is in the nonconservation form. In thepresent work, two different six equations model are derived for two pressures, two velocities and single temperature with the derivation of the equation of state. The closingequation for one of the six equations model is energy conservation equation while anotherone is closed by entropy balance equation. The partial differential form of governingequations is hyperbolic and written in the conservative form. At this point, the set ofgoverning equations are derived based on the principle of extended *** method of solving single temperature from both six equation models are simple anddirect solution can be obtained. Numerical simulation has been tried using one of the sixequation models for air–water shock tube problems. Explicit fourth order runge–Kuttascheme is used with Finite Volume Shock Capturing method for solving the governingequations numerically. The pressure, velocity and volume fraction variations are captured along the shock tube length through flow solver. Experimental work is carried outto magnify the initial stage of liquid injection into a gas. The outcome of six equationsmodel for compressible two-phase flow has revealed the multi-phase flow characteristicsthat are similar to the actual conditions.

关键词： Two-phase flows shock tubes runge–Kutta scheme six equation models entropy balance

橡胶树CrISPr/Cas9编辑植株出现预期表型的突变阈值

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热带作物学报 2024年第8期45卷 1521-1527页

作者：杨先锋林秋飞 jinu Udayabhanu 李季钱遵超邓玉婷黄天带中国热带农业科学院橡胶研究所/农业农村部橡胶树生物学与遗传资源利用重点实验室海南海口571101 海口市热带植物种苗创新重点实验室海南海口571101 中国热带农业科学院三亚研究院海南三亚572025 热带作物生物育种全国重点实验室海南三亚572025 云南农业大学热带作物学院云南普洱665000

本课题组前期在橡胶树原生质体中分别实现了基于CrISPr/Cas9-rNP及质粒介导的瞬时转化基因编辑,并以HbPDS基因为靶标,在橡胶树愈伤组织中实现了农杆菌介导的稳定转化基因编辑,并获得了出现白化表型的愈伤组织,但由于橡胶树愈伤诱导体胚... 详细信息

本课题组前期在橡胶树原生质体中分别实现了基于CrISPr/Cas9-rNP及质粒介导的瞬时转化基因编辑,并以HbPDS基因为靶标,在橡胶树愈伤组织中实现了农杆菌介导的稳定转化基因编辑,并获得了出现白化表型的愈伤组织,但由于橡胶树愈伤诱导体胚的技术还不稳定,导致未能获得基因编辑植株。为了获得橡胶树基因编辑幼苗,本研究继续以HbPDS基因为靶标,改用橡胶树体胚为侵染受体,开展农杆菌介导的遗传转化,经潮霉素抗性筛选获得增殖的T_0代抗性体胚,通过Cas9基因分子检测共挑选出116个阳性转化体胚,通过对靶点处的测序检测发现有5个胚块发生了基因编辑,编辑效率为4.3%。通过植株再生程序,获得了2株再生植株,表型观测均是嵌合体,表现为同一编辑植株上同时存在绿色及白化叶片。同时取白化叶片和绿色叶片进行高通量测序,发现二者均已发生了基因编辑,除了1个白化叶片发生了纯合双等位突变之外,其余叶片均为嵌合突变。其中,白化叶片编辑细胞的占比介于86%~100%之间,而绿色部位编辑细胞所占比例介于66%~69%之间,说明橡胶树CrISPr/Cas9编辑植株出现预期表型的突变阈值高于69%,介于70%~85%之间,为今后创制有表型的橡胶树基因编辑幼苗提供理论指导。同时,本研究证明了T_0代转化体胚及其获得的再生植株嵌合比例太高,不宜作为植株再生的材料,为今后通过对T_0代阳性体胚进行继代获得T_1代纯合体胚,并以T_1代体胚为转化受体获得纯合基因编辑植株提供思路。本研究首次公开报道获得了橡胶树基因编辑植株,尽管是嵌合植株,但也增进了对CrISPr/Cas9在橡胶树中作用的理解,为下一步在橡胶树中改进并应用基因编辑技术奠定基础。

关键词：橡胶树 CrISPr/Cas9 HbPDS基因基因编辑突变阈值

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人物事件导向下万里茶道茶商档案资源知识聚合研究

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山西档案 2024年第2期 26-34页

作者：赵雪芹李金璐湖北大学历史文化学院武汉430062

档案知识聚合是数智时代档案资源开发利用的模式转向和创新路径。挖掘万里茶道茶商档案资源间隐含的知识关联,进而实现多维度、多层次的知识聚合,对于万里茶道茶商档案资源的知识组织、语义关联与知识服务具有重要意义。从数据资源层、... 详细信息

档案知识聚合是数智时代档案资源开发利用的模式转向和创新路径。挖掘万里茶道茶商档案资源间隐含的知识关联,进而实现多维度、多层次的知识聚合,对于万里茶道茶商档案资源的知识组织、语义关联与知识服务具有重要意义。从数据资源层、知识组织层、关联聚合层、服务应用层构建了人物事件导向下万里茶道茶商档案资源的知识聚合模型;再以“羊楼洞”茶商档案资源为例进行实证研究,证明茶商档案资源知识聚合模型设计的科学性与实用性,以期为万里茶道茶商档案资源知识组织与开发利用提供借鉴思路,助力万里茶道申遗工作稳步推进。

关键词：档案知识聚合万里茶道茶商档案资源茶商人物事件

The genetic variation in Monocarboxylic acid transporter 2 （MCT2） has functional and clinical relevance with male infertility

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Asian Journal of Andrology 2014年第5期16卷 694-697,I0007页

作者： jinu Lee Dong ryul Lee Suman Lee Yonsei Institute of Pharmaceutical Sciences College of Pharmacy Yonsei University Incheon Department of Biomedical Science CHA University Seongnam-si Korea

Monocarboxylic acid transporter 2 （MCT2） transports pyruvate and lactate outside and inside of sperms, mainly as energy sources and plays roles in the regulation of spermatogenesis. We investigated the association among genetic variations in the MCT2 gene, male infertility and MCT2 expression levels in sperm. The functional and genetic significance of the intron 2 （＋28201A 〉 g, rs10506398） and 3＇ untranslated region （UTr） single nucleotide polymorphism （SNP）（＋2626g 〉 A, rs10506399） of MCT2 variants were investigated. Two MCT2 polymorphisms were associated with male infertility （n = 471, P 〈 0.05）. In particular, the MCT2-3＇ UTr SNP （＋2626 g 〉 A） had a strong association with the oligoasthenoteratozoospermia （OAT） group. The ＋2626gg type had an almost 2.4-fold higher sperm count than that of the ＋2626AA type （＋2626gg; 66 x 106 vs ＋2626AA; 27 x 106, P 〈 0.0001）. The MCT2-3＇ UTr SNP may be important for expression, as it is located at the MCT2 3＇ UTr. The average MCT2 protein amount in sperm of the ＋2626gg type was about two times higher than that of the ＋2626AA type. The results suggest that genetic variation in MCT2 has functional and clinical relevance with male infertility.

关键词： 3' UTr male infertility monocarboxylic acid transporter 2 single nucleotide polymorphism sperm

Aesthetics of urban commercial streets from the perspective of cognitive memory and user behavior in urban environments

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Frontiers of Architectural research 2022年第5期11卷 949-962页

作者： Sanjana Balasubramanian Chandramathy Irulappan jinu Louishidha Kitchley Department of Architecture Thiagarajar College of EngineeringMaduraiIndia

Streets are one of the major elements that make-up the urban environment. Urban commercial and mixed-use street types occur as public spaces in every town and city all around the world. With the paucity of such spaces, streets have taken up to solve the problem. Hence, this study assesses the key physical, visual, and aesthetical characteristics and examines the influence of aesthetical attributes over the activity pattern, user behavioral responses, and the color palette observed. Moreover, this research has been carried out in Coimbatore, Tamilnadu, India. Four significant commercial streets were identified and featured in the main study. The research method comprehends a structured questionnaire and multiple interviews to amass data, photo elicitation, and video corroboration to identify the key visual characteristics to study and scrutinize the aesthetical responses to various attributes that make good-looking urban commercial and mixed-use street types. The results of the study indicate that the diversity and perceived pleasantness of the environment, which includes elements such as facades, colors, aspect ratios, maintenance, and vegetation, has a very close association with walking preferences. The outcome of the study would also help architects, urban designers and planners, and policy makers to create positive spaces to foster urban commercial street types as place-making and aesthetically pleasing streets.

关键词： User behavior Urban commercial streets Mixed-use Aesthetical characteristics Place making Facade characteristics

A comparative study on microstructural evolution and surface properties of graphene/CNT reinforced Al6061-SiC hybrid surface composite fabricated via friction stir processing

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Transactions of Nonferrous Metals Society of China 2019年第10期29卷 2005-2026页

作者： Abhishek SHArMA Vyas Mani SHArMA jinu PAUL Department of Mechanical Engineering Indian Institute of Technology

A comparative study on the surface properties of Al-SiC-multi walled carbon nanotubes (CNT) and Al-SiC-graphene nanoplatelets (gNP) hybrid composites fabricated via friction stir processing (FSP) was documented. Microstructural characterization reveals a more homogeneous dispersion of gNPs in the Al matrix as compared to CNTs. Dislocation blockade by SiC and gNP particles along with the defect-free interface between the matrix and reinforcements is also observed. Nanoindentation study reveals a remarkable ~207% and ~27% increment in surface nano-hardness of Al-SiC-gNP and Al-SiC-CNT hybrid composite compared to as-received Al6061 alloy, respectively. On the other hand, the microhardness values of Al-SiC-gNP and Al-SiC-CNT are increased by ~36% and ~17% relative to as-received Al6061 alloy, respectively. Tribological assessment reveals ~56% decrease in the specific wear rate of Al-SiC-gNP hybrid composite, whereas it is increased by ~122% in Al-SiC-CNT composite. The higher strength of Al-SiC-gNP composite is attributed to the mechanical exfoliation of gNPs to few layered graphene (FLg) in the presence of SiC. Also, various mechanisms such as thermal mismatch, grain refinement, and Orowan looping contribute significantly towards the strengthening of composites. Moreover, the formation of tribolayer by the squeezed-out gNP on the surface is responsible for the improved tribological performance of the composites. raman spectroscopy and various other characterization methods corroborate the results.

关键词： friction stir processing graphene carbon nanotube hybrid composite wear

Object recognition and Obstacle Avoidance robot

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Object Recognition and Obstacle Avoidance Robot

一种新的SDH双向复用段保护环(BMSPr)的容量分配优化算法

2009中国控制与决策会议

作者： Karthi Balasubramanian Arunkumar r jinu Jayachandran Vishnu Jayapal Bibin A Chundatt Joshua D Freeman Department of Electronics and Communication Engineering Amrita School of Engineering Amrita VishwavidyapeethamIndia

＜正＞Design highlights of a ’Three-wheeled Autonomous Navigational robot’ are presented in this *** efficient modular architecture is proposed for ease of adding various modules to the *** detection,pattern recognition and obstacle avoidance are the key aspects of the *** robot has intelligence built into it that enables it to recognize and pick up balls of a particular colour and ignore other objects in its path.A single board computer mounted on the robot acts as the central *** communicates with ultrasonic sensors and motors through multiple microcontrollers and controls the entire motion of the *** part of the robot design,a modified H-bridge circuit for driving DC motors efficiently is proposed in this paper.

关键词： Index Terms—Modular robot Architecture Obstacle Detection SONAr Object recognition Hough Transform Modified H-Bridge Circuit

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通信学报 1998年第9期19卷 15-21页

作者：隆克平陈继努黄香馥重庆邮电学院电子科技大学北京邮电大学程控交换与通信网国家重点实验室重庆邮电学院科研所电子科技大学电子工程学院

容量优化分配是ＳＤＨ／ＳＯＮＥＴ双向自愈环规划的重要方面，但是目前国内外尚无一种有效的ＳＤＨ／ＳＯＮＥＴ双向环的容量分配优化算法。为此，本文提出了一种基于最短路径电路矩阵的ＳＤＨ／ＳＯＮＥＴ双向复用段保护环（ＢＭＳＰ... 详细信息

容量优化分配是ＳＤＨ／ＳＯＮＥＴ双向自愈环规划的重要方面，但是目前国内外尚无一种有效的ＳＤＨ／ＳＯＮＥＴ双向环的容量分配优化算法。为此，本文提出了一种基于最短路径电路矩阵的ＳＤＨ／ＳＯＮＥＴ双向复用段保护环（ＢＭＳＰＲ）的容量分配优化算法。模拟结果表明：该算法非常有效且运行时间≤５０ｍｓ，通过该算法的优化，使得容量需求可节约４０％左右，这将会给工程投资带来巨大的节约。

关键词：环容量需求平衡优化算法 SDH/SONET BMSPr

Impact of Power Control Strategy and Cell Classification on Hierarchical Cellular System's reverese Link

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The Journal of China Universities of Posts and Telecommunications 1999年第2期6卷 1-7页

作者： ZHOU Jie CHEN jinu YOSHIKUNI Onozato(1. Department of Computer Science, Chongqing Universities of Posts and Telecommunications. Chongqing. 400065. P r, China 2. Department of Computer Science, Faculty of Engineering, gunma University. Kiryu-City. gunma P Department of Computer Science Chongqing Universities of Posts and Telecommunications Chongqing 400065 P R. China Department of Computer Science Faculty of Engineering Gunma University Kiryu-City Gunma Province Japan

This contribution deals with the outage probability in a hierarchical macrocell/microcell CDMA *** consider different attenuation models and imperfection of power control with log-normal *** on IS-95 protocol, the impacts of imperfect sectorization and imperfection of power control on outageProbability are fully investigated From the numerical results, we conclude that the high user capacity may beexpected in the case of relatively tight power control and narrower overlap betWeen sectors and the hierarchicalmacrocell/microcell cellular systems are potential for the future cellular mobile communication.

关键词： transmitter power control (TPC) binomial distribution log-normal dl'stribution hierarchicalcellular system outage probability cell classification: link capocity break point: perfect/imperfect powercontrol$$$$CLC number:##5TN 914.53