检索结果-南通市图书馆

Constructing an Educational Knowledge Graph with Concepts Linked to Wikipedia

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2021年第5期36卷 1200-1211页

作者： Fu-Rong Dang Jin-Tao Tang Kun-Yuan Pang Ting Wang Sha-Sha Li Xiao Li College of Computer Science and Technology National University of Defense TechnologyHunan 410073China Information Center National University of Defense TechnologyHunan 410073China

To use educational resources efficiently and dig out the nature of relations among MOOCs(massive open online courses),a knowledge graph was built for MOOCs on four major platforms:Coursera,EDX,XuetangX,and *** paper demonstrates the whole process of educational knowledge graph construction for *** this knowledge graph,the largest knowledge graph of MOOC resources at present,stores and represents five classes,11 kinds of relations and 52779 entities with their corresponding properties,amounting to more than 300000 ***,24188 concepts are extracted from text attributes of MOOCs and linked them directly with corresponding Wikipedia entries or the closest entries calculated semantically,which provides the normalized representation of knowledge and a more precise description for MOOCs far more than enriching words with explanatory ***,prerequisites discovered by direct extractions are viewed as an essential supplement to augment the connectivity in the knowledge *** knowledge graph could be considered as a collection of unified MOOC resources for learners and the abundant data for researchers on MOOC-related applications,such as prerequisites mining.

关键词： concept extraction educational resource knowledge graph massive open online course(MOOC) prerequisite

DIRECT SOMATIC EMBRYOGENESIS AND PLANT REGENERATION IN PROTOPLAST CULTURE OF WHEAT (Triticum aestivum L. )

维普期刊数据库评论

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 Science Bulletin 1990年第17期35卷 1495-1496页

作者：郭光沁夏光敏李忠谊陈惠民 Biology Department Shandong UniversityJinan 250100 PRC

Wheat is one of the most important agronomic crops in the world. The regeneration of plants is an important prerequisite for the improvement in genetic manipulation. Protoplast culture of wheat has been proved extremely difficult and intense efforts are making for it. Recently, there have been reports on plantlets formed from wheat protoplasts. However,

关键词： Triticum wheat agronomic Wheat prerequisite extremely crops manipulation regeneration regenerated

推进标准化是国家治理现代化的必然要求(英文)

在线全文

学校读者我要写书评

暂无评论

China Standardization 2016年第1期66卷 52-55页

作者：杜飞进 People’s Daily

The modernization of state governance is not only the important dimension and content but also the prerequisite for China’s socialist modernization *** 2013,the 3rd Plenary Session of the 18th CPC national Congress decided the general objective of deepening reforms in an all-around way:"the improvement and development of socialist system with Chinese characteristics and the modernization of state governance system and capacity".The strategic blueprint

关键词： modernization governance prerequisite deepening socialist decided strategic circumstance handle heritage

From Keeping Harmony with All States To Building a Harmonious World——To have a profound grasp of China's peaceful development strategy from the perspective of history and culture

在线全文

学校读者我要写书评

暂无评论

Peace 2014年第2期 13-17,24页

作者： Yang Faxi the International Department CPC "Seeking Truth" magazine

To objectively and rationally grasp the strategic intent of peaceful development China adheres to is the important foundation and prerequisite to construct a new-type *** among major powers featuring non-confrontation,non-conflict,mutual respect,and win-win *** achieve the objectiveness and rationality,one must understand China’s historical and cultural traditions,and understand the Chinese pursuit

关键词： grasp cooperation prerequisite pursuit mutual prof

China's Post & Telecommunications

在线全文

学校读者我要写书评

暂无评论

China's Foreign Trade 1994年第5期 16-17页

作者： Wang Hualong

As part of the infrastructure of the national economy and a prerequisite for opening up to the outside world, China’s post and telecommunications sustained high speed development for the eighth successive year in 1993. Fixed asset investment reached RMB 40 billion, 2.5 times more than the previous year. Postal business totalled RMB46.14 billion, 58.9 percent up on that of the year before. Income

关键词： prerequisite sustained successive outside Tianjin Nanjing morethan Fujian Guangdong infrastructure

GENE THERAPY (continued) Ⅱ. TECHNIQUES FOR GENE THERAPY

在线全文

学校读者我要写书评

暂无评论

中国实验血液学杂志 1994年第2期2卷 115-124页

作者： Lifen Ren(Department of Physiology, Medical College of Wisconsin, Milwaukee. USA)

An essential prerequisite of any genetherapy technique is the efficient and stable de-livery of transferred DNA into the target *** of techniques are available for directly in-troducing DNA into eukaryotic cells,includingcoprecipitation with calcium phosphate,electroporation and microinjection. The efficien-cy of most of these physical transfection tech-niques is less than one in ten thousand, and

关键词： DNA livery continued transfection prerequisite eukaryotic thousand GENE THERAPY dystrophin packaging

NON-PARTICIPATION OF PLASTOQUINONE IN FERREDOXIN-MEDIATED CYCLIC ELECTRON TRANSFER

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1983年第5期28卷 676-679页

作者：钱露萍钱月琴叶济宇沈巩楙 Shanghai Institute of Plane Physiology Academia Sinica Shanghai Institute of Plane Physiology Academia Sinican photosynthetic electron transport chain of higher plant chloroplasts electrons are activated through two light reactions in series resulting in their unidirectional transfer from H_2O to NADP+. This is called the non-cyclic electron transfer and its coupled phosphorylation (PSP) the non-cyclic phosphorylation. If certain redox

In photosynthetic electron transport chain of higher plant chloroplasts, electrons are activated through two light reactions in series, resulting in their unidirectional transfer from H2O to NADP+. This is called the ... 详细信息

关键词： photosynthetic unidirectional NADP inhibited redox prerequisite illumination diverse exert endogenous

PLANT REGENERATION FROM PROTOPLAST OF RICE (Oryza sativa)

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1987年第20期32卷 1427-1430页

作者：雷鸣李向辉孙勇如黄美娟 Institute of Genetics Academia Sinica Beijing

The rapidly developing bio-technologies have become an important way in the improvement of crops. The protoplast cultures as a prerequisite for the genetic manipulation such as protoplast fusion, gene transformation have been widely used and developed. But it is still very difficult to regenerate plants from protoplasts of rice, wheat, maize and other important gramineal crops.

关键词： prerequisite maize wheat crops manipulation predominantly diameters regeneration sealed tight

IN VITRO PLANT REGENERATION FROM LEAFLET EXPLANTS OF TRITICALE

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1981年第12期26卷 1121-1124页

作者：钱迎倩周云罗蔡起贵 Institute of Botany Academia Sinica Institute of Botany

Cereal improvement by means of genetic modification is a frontier topic attracting world-wide attention. The plant regeneration of divisible cells from protoplasts is a prerequisite for the genetic manipulation in hig... 详细信息

关键词： prerequisite frontier attracting regeneration manipulation sheath basal seldom marked situated