检索结果-南通市图书馆

Correlation between the rock mass properties and maximum horizontal stress:A case study of overcoring stress measurements

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 39-48页

作者： Peng Li Meifeng Cai Shengjun Miao Yuan Li Yu Wang Key Laboratory of Ministry of education for Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyXuzhou 221116China

Understanding the mechanical properties of the lithologies is crucial to accurately determine the horizontal stress *** investigate the correlation between the rock mass properties and maximum horizontal stress,the three-dimensional(3D)stress tensors at 89 measuring points determined using an improved overcoring technique in nine mines in China were adopted,a newly defined characteristic parameter C_(ERP)was proposed as an indicator for evaluating the structural properties of rock masses,and a fuzzy relation matrix was established using the information distribution *** results indicate that both the vertical stress and horizontal stress exhibit a good linear growth relationship with *** is no remarkable correlation between the elastic modulus,Poisson's ratio and depth,and the distribution of data points is scattered and ***,there is no obvious relationship between the rock quality designation(RQD)and *** maximum horizontal stress σ_(H) is a function of rock properties,showing a certain linear relationship with the C_(ERP)at the same *** addition,the overall change trend of σ_(H) determined by the established fuzzy identification method is to increase with the increase of C_(ERP).The fuzzy identification method also demonstrates a relatively detailed local relationship betweenσ_H and C_(ERP),and the predicted curve rises in a fluctuating way,which is in accord well with the measured stress data.

关键词： overcoring stress measurements elastic modulus Poisson's ratio rock quality designation maximum horizontal stress fuzzy identification

A restoration-promoting integrated floating bed and its experimental performance in eutrophication remediation

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2014年第5期26卷 1090-1098页

作者： Yiming Guo Yunguo Liu Guangming Zeng Xinjiang Hu Xin Li Dawei Huang Yunqin Liu Yicheng Yin College of Environmental Science and Engineering Hunan University Key Laboratory of Environmental biology and Pollution Control (Hunan University) Ministry of Education

Numerous studies on eutrophication remediation have mainly focused on purifying water first, then restoring submerged macrophytes. A restoration-promoting integrated floating bed （RPIFB） was designed to combine the processes of water purification and macrophyte restoration simultaneously. Two outdoor experiments were conducted to evaluate the ecological functions of the RP1FB. Trial 1 was conducted to compare the eutrophication purification among floating bed, gradual-submerging bed （GSB） and RPIFB technologies. The results illustrated that RPIFB has the best purification capacity. Removal efficiencies of RPIFB for TN, TP,NH4＋-N, NO3-N, CODcr, Chlorophyll-a and turbidity were 74.45%, 98.31%, 74.71%, 88.81%, 71.42%, 90.17% and 85%, respectively. In trial 2, influences of depth of GSB and photic area in RPIFB on biota were investigated. When the depth of GSB decreased and the photic area of RPIFB grew, the height of Potamogeton crispus Linn. increased, but the biomass of Canna indica Linn. was reduced. The mortalities of Misgurnus anguillicaudatus and Bellamya aeruginosa in each group were all less than 7%. All results indicated that when the RPIFB was embedded into the eutrophic water, the regime shift from phytoplankton-dominated to macrophyte-dominated state could be promoted. Thus, the RPIFB is a promising remediation technology for eutrophication and submerged macrophyte restoration.

关键词： submerged macrophyte restoration eutrophication floating bed regime shift

Universal Digital Library—Future research directions

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第11期6卷 1204-1205页

作者： BALAKRISHNAN N. Supercomputer education and Research centre Indian Institute of Science Bangalore 560 012 India

This paper starts with a description of the present status of the Digital Library of India Initiative. As part of this initiative large corpus of scanned text is available in many Indian languages and has stimulated a vast amount of research in Indian language technology briefly described in this paper. Other than the Digital Library of India Initiative which is part of the Million Books to the Web Project initiated by Prof Raj Reddy of Carnegie Mellon University, there are a few more initiatives in India towards taking the heritage of the country to the Web. This paper presents the future directions for the Digital Library of India Initiative both in terms of growing collection and the technical challenges in managing such large collection poses.

关键词： Digital Library Search engines Language technology

Complete Cototal Roman Domination Number of a Graph for User Preference Identification in Social Media

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第6期45卷 2405-2415页

作者： J.Maria Regila Baby K.Uma Samundesvari Department of Mathematics Noorul Islam Centre for Higher EducationKumaracoil629175India

Many graph domination applications can be expanded to achieve complete cototal *** every node in a dominating set is regarded as a record server for a PC organization,then each PC affiliated with the organization has direct access to a document *** is occasionally reasonable to believe that this gateway will remain available even if one of the scrape servers *** every PC has direct access to at least two documents’servers,a complete cototal dominating set provides the required adaptability to non-critical failure in such *** this paper,we presented a method for calculating a graph’s complete cototal roman domination *** also examined the properties and determined the bounds for a graph’s complete cototal roman domination number,and its applications are *** has been observed that one’s interest fluctuate over time,therefore inferring them just from one’s own behaviour may be ***,it may be able to deduce a user’s constant interest to some level if a user’s networking is also watched for similar or related *** research proposes a method that considers a user’s and his channel’s activity,as well as common tags,persons,and organizations from their social media posts in order to establish a solid foundation for the required conclusion.

关键词： Social media network graph complete cototal roman domination

The selective recognition of mismatched d(GCGAGC)_2 by the cobalt(III) complex

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

Science China Chemistry 2005年第1期48卷 58-66页

作者： CHEN Huili YANG Pin Key Laboratory of Chemical biology and Molecular Engineering of Ministry of education Institute of Molecular Science Shanxi University Taiyuan 030006 China Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education Institute of Molecular Science Shanxi University Taiyuan 030006 China

We studied the binding of [Co(phen)2(HPIP)]Cl3 to mismatched d(GCGAGC)2 con- taining two sheared G:A mispairs by NMR. The result shows that the complex was intercalated into G:A region from the minor groove and extended to the major groove, and could selectively recognize the mispairs. 31P NMR indicates that the complex binding induced the change of the phosphate backbone in the mismatched base pairs region.

关键词： cobalt complex, mismatched DNA, mispairing recognition.

Supercoherent State of the Orthosymplectic (2,1) Superalgebra

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2001年第7期18卷 844-846页

作者： CHEN Yong-Qing SONG Xing-Chang Department of Physics Chemistry and BiologyShenzhen Institute of EducationShenzhen 518029 Department of Physics Peking UniversityBeijing 100871

The normalization supercoherent state of the orthosymplectic(OSP)(2,1)superalgebra is constructed and its properties are discussed in *** new inhomogeneous differential realizations of the OSP(2,1)superalgebras are *** may be of use for determining new concrete structure of the quasi-exactly-solvable hamiltonian corresponding to the OSP(2,1)supersymmetric quantum system.

关键词： coherent symplectic algebra

Effects of La^(3+) on inward K^+ channels at plasma membr in guard cells

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

Science China Chemistry 2005年第2期48卷 143-147页

作者： XUE Shaowu YANG Pin Institute of Molecular Science Chemical Biology and Molecular Engineering Laboratory of Ministry of Education Shanxi University Taiyuan 030006 China Institute of Molecular Science Chemical Biology and Molecular Engineering Laboratory of Ministry of Education Shanxi University Taiyuan 030006 China

The effects of La3+ on inward K+ channels at plasma membrane in vicia guard cells are investigated using the whole-cell patch-clamp recording mode. It is shown that La3+ on both sides of plasma membrane blocks inward K+ currents in a concentration- dependent manner, indicating that La3+ binding sites may exist on both sides of plasma membrane in guard cells in vicia. The dose response is fitted by the Michaelis-Menten relation characterized by an inhibitor constant Ki of 2.56±0.25 μmol·L?1 (outside membrane) and (1.18±0.11)×10?15 mol·L?1 (inside membrane). Intracellular La3+ has much stronger inhibitory effect on inward K+ currents than ex- tracellular La3+ does, suggesting there may exist stronger binding sites inside membrane than outside membrane. Since ion channel activities of guard cells directly affect plant stomatal movement and water status, our results imply that rare earth elements might have potential practical values in regulating plant water status and strengthening plant drought endurance.

关键词： whole-cell patch-clamp, guard cell, stomatal movements, inward K+ channels, La3+.

ZmOST1 mediates abscisic acid regulation of guard cell ion channels and drought stress responses

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant biology 2019年第4期61卷 478-491页

作者： Qiqi Wu Mei Wang Jianlin Shen Donghua Chen Yu Zheng Wei Zhang Key Laboratory of Plant Development and Environmental Adaption biology Ministry of Education School of Life Science Shandong University

The phytohormone abscisic acid(ABA) is an important mediator in the drought response, participating in, among other processes, stomatal movements. In Arabidopsis thaliana, the serine/threonine protein kinase,OST1, regulates this response, but the function of its maize homolog has yet to be established. Here, we isolated ZmOST1 and show that its encoded protein indeed acts to regulate guard cell movement. ZmOST1 was ubiquitously expressed throughout the plant, being highly expressed in guard cells, and inducible both by exogenous ABA and water stress. Transient expression of a ZmOST1-GFP fusion protein, in maize mesophyll protoplasts, indicated its subcellular localization in the cytoplasm and nucleus. A Zmost1 loss-of-function mutant exhibited reduced sensitivity to ABA-activated slow anion channels in maize guard cells, and reduced drought tolerance. Constitutive expression of ZmOST1, in an A. thaliana ost1-1 mutant rescued the phenotype with respect both to the sensitivity of guard cell slow anion currents to ABA treatment and stomatal closure. Our findings indicate a positive regulatory role for ZmOST1 in guard cell ABA signaling and drought response in maize plants.

关键词： ZmOST1 abscisic acid regulation guard cell

Protein targets for structure-based antiMycobacterium tuberculosis drug discovery

在线全文

学校读者我要写书评

暂无评论

Protein & Cell 2010年第5期1卷 435-442页

作者： Zhiyong Lou Xiaoxue Zhang Laboratory of Structural biology Tsinghua UniversityBeijing 100084China Higher education Press Beijing 100029China

Mycobacterium tuberculosis,which belongs to the genus Mycobacterium,is the pathogenic agent for most tuberculosis(TB).As TB remains one of the most rampant infectious diseases,causing morbidity and death with emergence of multi-drug-resistant and extensively-drugresistant forms,it is urgent to identify new drugs with novel targets to ensure future therapeutic *** this regards,the structural genomics of *** provides important information to identify potential targets,perform biochemical assays,determine crystal structures in complex with potential inhibitor(s),reveal the key sites/residues for biological activity,and thus validate drug targets and discover novel *** this review,we will discuss the recent progress on novel targets for structure-based *** drug discovery.

关键词： Mycobacterium tuberculosis crystal structure drug discovery target