检索结果-南通市图书馆

OLDTNF-based evaluation method for handling recursive queries in deductive databases

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 1998年第6期41卷 561-578页

作者：陈阳军 Technical Institute of Changsha Changsha China Department of Computer Science TU Chemnitz Chemnitz Germany

OLDTNF resolution is an important mechanism used in a Prolog interpreter. This mechanism is extended and improved for evaluating recursive queries in deductive databases. The key idea of the refinement is to distinguish between two classes of lookup nodes in an OLDTNF derivation and to handle them differently. First, reduce the search space by cutting of any subtree rooted at a lookup node of the first class. Further, speed up the evaluation by processing the second class in a second phase and generate many solutions directly from the solutions already produced (and the corresponding keys of solution lists) instead of evaluating them by expanding the corresponding subtrees in terms of the new solutions stored in solution lists.

关键词： Prolog SLD resolution OLDTNF resolution deductive databases recursion.

Accelerated algorithms for maximizing average happiness ratio in databases

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2021年第6期15卷 195-197页

作者： Jiping ZHENG Qi DONG Xianhong QIU Xingnan HUANG College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China Department of Computer Science and Technology Nanjing UniversityNanjing 210023China

1 Introduction and main contributions Identifying controllable number of data points from a large dataset to support multi-criteria decision-making is an important functionality of database systems,such as recommendat... 详细信息

关键词： retrieval. database databases

Plant Metabolic Network 15:A resource of genome-wide metabolism databases for 126 plants and algae

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2021年第11期63卷 1888-1905页

作者： Charles Hawkins Daniel Ginzburg Kangmei Zhao William Dwyer Bo Xue Angela Xu Selena Rice Benjamin Cole Suzanne Paley Peter Karp Seung Y.Rhee Department of Plant Biology Carnegie Institution for ScienceStanfordCalifornia94305USA DOE‐Joint Genome Institute Lawrence Berkeley LaboratoryBerkeleyCalifornia94720USA SRI International Menlo ParkCalifornia94025USA Johns Hopkins University Baltimore 2121 MarylandUSA

To understand and engineer plant metabolism, we need a comprehensive and accurate annotation of all metabolic information across plant species. As a step towards this goal, we generated genome-scale metabolic pathway databases of 126 algal and plant genomes, ranging from model organisms to crops to medicinal plants(https://***).Of these, 104 have not been reported *** systematically evaluated the quality of the databases, which revealed that our semi-automated validation pipeline dramatically improves the quality. We then compared the metabolic content across the 126 organisms using multiple correspondence analysis and found that Brassicaceae,Poaceae, and Chlorophyta appeared as metabolically distinct groups. To demonstrate the utility of this resource, we used recently published sorghum transcriptomics data to discover previously unreported trends of metabolism underlying drought tolerance. We also used single-cell transcriptomics data from the Arabidopsis root to infer cell typespecific metabolic pathways. This work shows the quality and quantity of our resource and demonstrates its wide-ranging utility in integrating metabolism with other areas of plant biology.

关键词： metabolism plant biology databases

Exploiting plant transcriptomic databases:Resources,tools,and approaches

在线全文

学校读者我要写书评

暂无评论

Plant Communications 2022年第4期3卷 1-13页

作者： Peng Ken Lim Xinghai Zheng Jong Ching Goh Marek Mutwi School of Biological Sciences Nanyang Technological University60 Nanyang DriveSingapore 637551Singapore

There are now more than 300000 RNA sequencing samples available,stemming from thousands of exper-iments capturing gene expression in organs,tissues,developmental stages,and experimental treatments for hundreds of plant *** expression data have great value,as they can be re-analyzed by others to ask and answer questions that go beyond the aims of the study that generated the *** gene expression provides essential clues to where and when a gene is active,the data provide powerful tools for predicting gene function,and comparative analyses allow us to study plant evolution from a new *** review describes how we can gain new knowledge from gene expression profiles,expres-sion specificities,co-expression networks,differential gene expression,and experiment *** also introduce and demonstrate databases that provide user-friendly access to these tools.

关键词： gene expression comparative transcriptomics gene function co-express ion differential expr ession databases

Speech databases for mental disorders: A systematic review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

General Psychiatry 2019年第3期32卷 119-129页

作者： Yiling Li Yi Lin Hongwei Ding Chunbo Li School of Foreign Languages Shanghai Jiao Tong University Shanghai China Shanghai Key Laboratory of Psychotic Disorders Shanghai Mental Health Center School of Medicine Shanghai Jiao Tong University Shanghai China Center for Excellence in Brain Science and Intelligence Technology (CEBSIT) Chinese Academy of Sciences Shanghai China

Background The employment of clinical databases in the study of mental disorders is essential to the diagnosis and treatment of patients with mental illness. While text corpora obtain merely limited information of content, speech corpora capture tones, emotions, rhythms and many other signals beyond content. Hence, the design and development of speech corpora for patients with mental disorders is increasingly important. Aim This review aims to extract the existing speech corpora for mental disorders from online databases and peer-reviewed journals in order to demonstrate both achievements and challenges in this area. Methods The review first covers publications or resources worldwide, and then leads to the reports from China, followed by a comparison between Chinese and nonChinese regions. Results Most of the speech databases were recorded in Europe or the United States by audio or video. Some were even supplemented by brain images and Event- Related Potential (ERP) statistics. The corpora were mostly developed for patients with neurocognitive disorders like stutter and aphasia, and mental illness like dementia, while other types of mental illness such as bipolar disorder, anxiety, d即ression and autism were scarce in number in database development. Strengths and limitations The results demonstrated that database development of neurocognitive disorders in China is much scarcer than that in some European countries, but the existing databases pave an instructive road for psychiatric problems. Also, the methods and applications of databases from the leading countries are inspiring for Chinese scholars, who are searchi ng methods for developing a comprehensive resource for clinical studies.

关键词： Speech databases mental disorders A systematic review

Routing Protocols for Transmitting Large databases or Multi databases Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2001年第Z1期6卷 448-450页

作者： He Hong, Ma Shao han Computer Science Department of Shandong University, Jinan 250100, China Computer Science Department of Shandong University Jinan China

Most knowledgeable people agree that networking and routing technologies have been around about 25 years. Routing is simultaneously the most complicated function of a network and the most important. It is of the same kind that more than 70% of computer application fields are MIS applications. So the challenge in building and using a MIS in the network is developing the means to find, access, and communicate large databases or multi databases systems. Because general databases are not time continuous, in fact, they can not be streaming, so we can't obtain reliable and secure quality of service by deleting some unimportant datagrams in the databases transmission. In this article, we will discuss which kind of routing protocol is the best type for large databases or multi databases systems transmission in the networks.

关键词： network routing protocol databases transmission

DATA MODEL AND VISUALIZATION OF 3D CITY LANDSCAPE BASED ON INTEGRATED databases

在线全文

学校读者我要写书评

暂无评论

Geo-Spatial Information Science 1999年第1期2卷 21-25页

作者： Li Deren Wang Yandong Zhu Qing Gong Jianya National Laboratory for Information Engineering in Surveying Mapping and Remote Sensing WTUSM Wuhan China

Data acquisition and modeling are the two important, difficult and costful aspects in a Cybercity project. 2D-GIS is mature and can manage a lot of spatial data. Thus 3D-GIS should make the best of data and technology of 2D-GIS. Construction of a useful synthetic environment requires integration of multiple types of information like DEM, texture images and 3D representation of objects such as buildings. In this paper, the method for 3D city landscape data model and visualization based on integrated databases is presented. Since the data volume of raster are very huge, special strategies(for example, pyramid gridded method) must be adopted in order to manage raster data efficiently. Three different methods of data acquisition, the proper data structure and a simple modeling method are presented as well. At last, a pilot project of Shanghai Cybercity is illustrated.

关键词： 3D city landscape integrated databases modeling visualization

THE INTEGRATED SPATIAL databases OF GEOSTAR

在线全文

学校读者我要写书评

暂无评论

Geo-Spatial Information Science 2000年第4期3卷 20-23页

作者： Zhu Qing Li Deren Gong Jianya Xiong Hanjiang Laboratory for Information Engineering in Surveying Mapping and Remote Sensing WTUSM Wuhan China

GeoStar is the registered trademark of GIS software made by WTUSM in *** means of the GeoStar,multi_scale images,DEMs,graphics and attributes integrated in very large seamless databases can be created,and the multi_dimensional dynamic visualization and information extraction are also *** paper describes the fundamental characteristics of such huge integrated databases,for instance,the data models,database structures and the spatial index *** last,the typical applications of GeoStar for a few pilot projects like the Shanghai CyberCity and the Guangdong provincial spatial data infrastructure (SDI) are illustrated and several concluding remarks are stressed.

关键词： spatial data infrastructure CyberCity integrated spatial databases GIS GeoStar

Applicability of databases in the Real Estate Valuation Process in the Conditions of the Emerging Economy of the Republic of Moldova

在线全文

学校读者我要写书评

暂无评论

Open Journal of Applied Sciences 2021年第6期11卷 623-632页

作者： Svetlana Albu Ion Albu Engineering Law and Real Estate Valuation Technical University of Moldova Chisinau Republic of Moldova

The real estate valuation activity in the Republic of Moldova dates from 2002, with the adoption of Law No. 989 on Evaluation Activity. Nevertheless, the legislative and methodological framework is extremely limited. There are no national professional standards. Meanwhile, the situations that require real estate valuation are multiplying and diversifying. Therefore, the valuers apply the provisions of the International Valuation Standards (IVS) and of the European Valuation Standards (TEGoVA) adapting them to the national realities by virtue of their knowledge and experience. Information stored in databases plays an important role in the real estate valuation process. In this paper, the authors analyse the content of existing databases in the Republic of Moldova (the databases of normative documents, the information system for the cadastre of real estate, the statistical databases, and specialized databases), the quality of the included information, as well as the applicability of that information in the real estate valuation process. The disadvantages, limitations and shortcomings of databases are highlighted, and measures are proposed to increase their usefulness.

关键词： Cadastre Information Statistics Macroeconomic and Microeconomic Indices Valuation databases