检索结果-南通市图书馆

Photometric and Spectroscopic Study of Two Low Mass ratio Contact Binary Systems:CrTS J225828.7-121122 and CrTSJ030053.5+230139

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

research in Astronomy and Astrophysics 2023年第11期23卷 1-6页

作者： Surjit S.Wadhwa Jelena Petrović Nick f.H.Tothill ain Y.De Horta Miroslav D.filipović Gojko Djurašević School of Science Western Sydney UniversityLocked Bag 1797PenrithNSW 2751Australia Astronomical Observatory Volgina 711060 BelgradeSerbia

The study reports photometric and spectroscopic observations of two recently recognized contact binary *** systems show total eclipses and analysis of the light curves indicates both have very low mass ratios of less than *** derive absolute parameters from color and distance based calibrations and show that,although both have low mass ratios,they are likely to be in a stable orbit and unlikely to *** other respects,both systems have characteristics similar to other contact binaries with the secondary larger and brighter than their main sequence counterparts and we also find that the secondary is considerably denser than the primary in both systems.

关键词： (stars:)binaries:eclipsing stars:mass-loss techniques:photometric

An Improved framework for requirement Change Management in Global Software Development

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Software Engineering and Applications 2014年第9期7卷 779-790页

作者： Nasir Mehmood Minhas Qurat-ul-ain Zafar-ul-Islam Atika Zulfiqar University Institute of Information Technology PMAS Arid Agriculture University Rawalpindi Pakistan

In this research, an improved framework for requirement change management in global software development (rCM_GSD) has been presented. The objective is to manage the change in requirement specifically in global software development in an appropriate manner. The proposed frame-work rCM_GSD follows the required processes of rCM and reduces the concerns of GSD. Systematic Literature review (SLr) was conducted for exploration of relevant research. During literature study, it is analyzed that the existing techniques of change management were not suitable for global software development (GSD). The change in requirements becomes more complicated in distributed environment due to the lack of communication and collaboration among globally dispersed stakeholders. The proposed model is compared with other models proposed in recent literature and analysis is made between them;feedback was obtained from the domain experts as well. The feedback and comparison results show that the proposed model provides an appropriate solution for requirement change management in GSD.

关键词： requirement Change Management (rCM) Global Software Development (GSD) requirement Engineering

Generalized Green Correspondence of Graded Modules

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2009年第4期30卷 413-420页

作者： Salah El-Din S. HUSSEIN Department of Mathematics Faculty of Science Ain Shams University Abasaya-Cairo 11566 Egypt.

The author studies the Green correspondence and quasi-Green correspondence for indecomposable modules over strongly graded rings. The motivation is to investigate the influence of induction and restriction processes o... 详细信息

关键词： Vertices Sources Graded rings Graded modules Green correspondence

Ougenioxylon chinjiensis sp. nov., a New fossil Species of the family Leguminosae from Chinji formation Salt range, Punjab Pakistan

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2014年第26期5卷 3745-3751页

作者： Noor-Ul-ain Soomro Basir Ahmed Arain Muhammad Tahir Mehmood rajput Institute of Plant Sciences University of Sindh Jamshoro Pakistan

This work is comprised of anatomical study of fossil wood collected from Chnji formation (72°22'E, 32°41'N) of Miocene age exposed at Chinji National reservoir. The material consists of a single piece of petrified wood dark brown in colour. The three dimensional sections were prepared by ground thin section technique. Microscopic examination of the characters was compared with modern and fossil wood and found comparable with the family Leguminosae. The closest resemblance of our fossil wood is with the wood of Ougenia. This fossil wood shows close resemblance in respect of vessels, fibers, parenchyma and xylem rays character. Therefore it is considered as new species and it is named Ougenioxylon chienjiensis sp. nov. The specific epithet refers to Chinji formation to which fossil wood belongs.

关键词： Ougenia chinjiensis fossil Wood Salt range Punjab Pakistan

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

教皇新堡与中餐的“相见恨晚”

天下美食 2011年第6期 60-61页

作者： ain

教皇新堡虽然不像波尔多、勃艮第那样在中国拥有众多的铁杆粉丝,但我深信她与中餐的天作之缘定会让其博得绝对的中国人缘!

关键词：新堡葡萄酒行业波尔多罗纳河酿酒师橡木桶酿酒技术葡萄栽培法国葡萄酒专业地位

Protein-protein interactions: Methods, databases, and applications in virus-host study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论