检索结果-南通市图书馆

Ground fissure development regularity and formation mechanism of shallow buried coal seam mining with Karst landform in Jiaozi coal mine: a case study

引用

Journal of Mountain Science 2023年第10期20卷 3101-3120页

作者： ZHU Heng-zhong School of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao 26659oChina State Key Laboratory of Strata Intelligent Control and Green Mining Co-Founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Water Resource Protection and Utilization in Coal Mining Beijing 102209China

A comprehensive study was undertaken at Jiaozi coal mine to investigate the development regularity of ground fissures in shallow buried coal seam mining with Karst landform,shedding light on the development type,geographical distribution,dynamic development process,and failure mechanism of these ground fissures by employing field monitoring,numerical simulation,and theoretical *** findings demonstrate that ground fissure development has an obvious feature of subregion,and its geographical distribution is significantly affected by *** type,open type,and stepped type are three different categories of ground *** fissures emerge dynamically as the panel advances,and they typically develop with a distance of less than periodic weighting step distance in advance of panel advancing *** fissures present the dynamic development feature,temporary fissure has the ability of *** dynamic development process of ground fissure with closed-distance coal seam repeated mining is expounded,and the development scale is a dynamic development stage of“closure→expansion→stabilized”on the basis of the original development *** the perspective of topsoil deformation,the computation model considering two points movement vectors towards two directions of the gob and the ground surface is established,the development criterion considering the critical deformation value of topsoil is *** mechanical model of hinged structure of inclined body is proposed to clarify the ground fissure development,and the interaction between slope activity and ground fissure development is *** research results fulfill the gap of ground fissures about development regularity and formation mechanism,and can contribute to ground fissure prevention and treatment with Karst landform.

关键词： Karst landform Shallow buried coal seam Development regularity Formation mechanism Ground fissure Repeated mining

来源：

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

Photofunction-Directed Coordination Molecular Engineering

引用

Chinese Journal of Chemistry 2021年第3期39卷 543-549页

作者： Yu-Wu zhong Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of PhotochemistryCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBejjing 100049China

Molecular engineering has emerged as a highly interdisciplinary field of study on function-directed molecular design,material synthesis,and property optimization,accompanied by a deep understanding of the structure-property *** this review,our recent progress on the design and preparations of photofunctional metal complexes and related materials is summarized from the perspective of coordination molecular *** particular,a series of cyclometalated diruthenium complexes with near-infrared(NIR)electrochromic property have been synthesized by engineering the bridging ligand structures.A group of ruthenium-amine conjugated complexes with multistage NIR electrochromism are obtained on the basis of a multicenter *** engineering the ligand structures,a series of new ruthenium and platinum complexes are synthesized to show switchable luminescence in response to various *** addition,photoluminescent ruthenium,iridium,and platinum complexes are assembled to afford micro/nanocrystals with well-defined morphology and luminescent properties.

关键词： Photochemistry Photophysics Transitional metals Metal-metal interactions Conjugation Luminescence

来源：

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

Theory of an m×n apple surface network with special boundary

引用

Communications in Theoretical Physics 2023年第6期75卷 138-149页

作者： Zhi-zhong Tan Department of physics Nantong UniversityNantong226019China

As is well known,any condition change in a network model will affect the research method and *** paper studies an arbitrary m×n apple surface network with a pair of non-uniform boundary resistors,which is a complex network that has not been solved *** research process of this paper consists of four strict basic steps according to RT-V *** the breakthrough of matrix transformation and eigenvector solution,two exact potential function formulae and two equivalent resistance formulae are derived.A series of applications and special cases are given to help readers understand the *** particular,we have drawn eight visualized potential function images,which can intuitively understand the changing characteristics of potential *** establishment of theoretical results provides a new theoretical basis for related interdisciplinary research.

关键词： surface structure resistor network RT-V method matrix equation potential function exact solution

来源：

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

汉麻籽多肽靶向抑制胰脂肪酶/胆固醇酯酶的分子作用机制

引用

食品科学 2025年第2期46卷 38-49页

作者：尹浩朱将雄赵海云钟宇王丹凤邓云上海交通大学农业与生物学院上海200240 上海交通大学云南(大理)研究院云南大理671000 云南省大理白族自治州检验检测院云南大理671000

采用酶活动力学、联合抑制、荧光光谱、等温滴定量热法和分子对接等技术系统探究两种多肽(APAM和RLPA)对胰脂肪酶(pancreatic lipase,PL)和胆固醇酯酶(cholesterol esterase,CE)活性调控效果及分子结合机制。结果表明,RLPA对PL和CE具有... 详细信息

采用酶活动力学、联合抑制、荧光光谱、等温滴定量热法和分子对接等技术系统探究两种多肽(APAM和RLPA)对胰脂肪酶(pancreatic lipase,PL)和胆固醇酯酶(cholesterol esterase,CE)活性调控效果及分子结合机制。结果表明,RLPA对PL和CE具有更强的抑制活性,其半抑制浓度分别为(79.62±3.20)μmol/L和(301.27±14.40)μmol/L。抑制动力学分析表明APAM对两种酶的抑制机制为竞争性抑制,而RLPA则为混合性抑制。联合抑制表明APAM和RLPA在低浓度下均可与奥利司他协同抑制PL和CE,但在高浓度下协同作用减弱,甚至出现拮抗现象。荧光光谱结果表明两种多肽可以通过与PL和CE发生结合产生静态猝灭,改变了酶中脂肪族氨基酸的疏水环境。等温滴定量热法证明多肽与酶的结合过程是自发且放热,主要通过氢键和静电相互作用实现。分子对接模拟进一步分析表明氢键、盐桥和阳离子-π相互作用在多肽与酶的结合中起着至关重要的作用。这项研究丰富了对多肽与PL和CE的相互作用机制的认识,为开发基于汉麻籽蛋白的功能性食品提供了科学依据。

关键词：脂质消化酶抑制机制荧光光谱等温滴定量热法分子模拟

来源：

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

A Result on Fractional(a,b,k)-critical Covered Graphs

引用

Acta Mathematicae Applicatae Sinica 2021年第4期37卷 657-664页

作者： Si-zhong ZHOU School of Science Jiangsu University of Science and TechnologyZhenjiang212100China

A fractional[a,b]-factor of a graph G is a function h from E(G)to[0,1]satisfying a≤d^(h)_(G)(v)≤b for every vertex v of G,where d^(h)_(G)(v)=∑e∈E(v)h(e)and E(v)={e=uv:u∈V(G)}.A graph G is called fractional[a,b]-covered if G contains a fractional[a,b]-factor h with h(e)=1 for any edge e of G.A graph G is called fractional(a,b,k)-critical covered if G—Q is fractional[a,b]-covered for any Q⊆V(G)with∣Q∣=*** this article,we demonstrate a neighborhood condition for a graph to be fractional(a,b,k)-critical ***,we claim that the result is sharp.

关键词： graph neighborhood fractional[a,6]-factor fractional[a.6]-covered graph fractional(a.b,k)-critical covered graph

来源：

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

Path Factors and Neighborhoods of Independent Sets in Graphs

引用

Acta Mathematicae Applicatae Sinica 2023年第2期39卷 232-238页

作者： Si-zhong ZHOU School of Science Jiangsu University of Science and TechnologyZhenjiang 212100China

A path-factor is a spanning subgraph F of G such that every component of F is a path with at least two *** k≥2 be an integer.A P_(≥k)-factor of G means a path factor in which each component is a path with at least k vertices.A graph G is a P_(≥k)-factor covered graph if for any e∈E(G),G has a P_(≥k)-factor including ***βbe a real number with 1/3≤β≤1 and k be a positive *** verify that(ⅰ)a k-connected graph G of order n with n≥5k+2 has a P_(≥3)-factor if|NG(I)|>β(n-3k-1)+k for every independent set I of G with|I|=「β(2k+1)」;(ⅱ)a(k+1)-connected graph G of order n with n≥5k+2 is a P_(≥3)-factor covered graph if|NG(I)|>β(n-3k-1)+k+1 for every independent set I of G with|I|=「β(2k+1)」.

关键词： graph independent set neighborhood P≥3-factor P≥3-factor covered graph

来源：

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

N=2 Multicomponent Supersymmetric KP Hierarchy and Additional Symmetries

引用

Acta Mathematica Sinica,English Series 2023年第1期39卷 99-106页

作者： Chuan zhong LI College of Mathematics and Systems Science Shandong University of Science and TechnologyQingdao 266590P.R.China

We study additional non-isospectral symmetries of multicomponent constrained N=2 supersymmetric Kadomtsev-Petviashvili(KP)*** symmetries are shown to form an infinite-dimensional non-Abelian superloop superalgebra.

关键词： Multicomponent constrained N=2 supersymmetric Kadomtsev-Petviashvili hierarchies additional symmetries superloop superalgebra

来源：

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

LIL for the Length of the Longest Increasing Subsequences

引用

Acta Mathematicae Applicatae Sinica 2020年第2期36卷 283-293页

作者： zhong-gen SU School of Mathematcial Sciences Zhejiang UniversityHangzhou 310027China

Let X1,X2,…,Xn,…be a sequence of *** variables uniformly distributed on[0;1],and denote by Ln the length of the longest increasing subsequences of X1,X2,…,*** the poissonized version Hn based on Hammersley’s representation in the 2-dimensional space.A law of the iterated logarithm for Hn is established using the well-known subsequence method and Borel-Cantelli *** key technical ingredients in the argument include superadditivity,increment independence and precise tail estimates for the Hn’*** work was motivated by recent works due to Ledoux(***.31,(2018)).It remains open to establish an analog for the Ln itself.

关键词： Borel-Cantelli lemma Hammersley's representation law of the iterated logarithm longest increasing subsequences

来源：

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

Sequential maneuvering decisions based on multi-stage influence diagram in air combat

引用

Journal of Systems Engineering and Electronics 2007年第3期18卷 551-555页

作者： zhong Lin Tong Ming'an zhong Wei Zhang Shengyun Dept. of Electronic Information Northwestern Polytechnical Univ. Xi'an 710072 P. R. China School of Electronic Science Jiangxi Univ. of Finance and Economics Nanchang 330013 P. R. China

A multi-stage influence diagram is used to model the pilot＇s sequential decision making in one on one air combat. The model based on the multi-stage influence diagram graphically describes the elements of decision process, and contains a point-mass model for the dynamics of an aircraft and takes into account the decision maker＇s preferences under uncertain conditions. Considering an active opponent, the opponent＇s maneuvers can be modeled stochastically. The solution of multistage influence diagram can be obtained by converting the multistage influence diagram into a two-level optimization problem. The simulation results show the model is effective.

关键词： multi-stage influence diagram air combat maneuvering decision hierarchical optimization.

来源：

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

The deep mantle upwelling beneath the northwestern South China Sea:Insights from the time-varying residual subsidence in the Qiongdongnan Basin

引用

Geoscience Frontiers 2021年第6期12卷 223-235页

作者： zhong-Xian Zhao Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyInnovation Academy of South China Sea Ecology and Environmental EngineeringChinese Academy of SciencesGuangzhou 511458China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Southern Marine Science and Engineering Guangdong Laboratory Guangzhou 511458China Key Laboratory of Marine Mineral Resources Ministry of Natural ResourcesGuangzhou 510760China

Deep hot mantle upwelling is widely revealed around the Qiongdongnan Basin on the northwestern South China Sea margin. However, when and how it influenced the hyper-extended basin is *** resolve these issues, a detailed analysis of the Cenozoic time-varying residual subsidence derived by subtracting the predicted subsidence from the backstripped subsidence was performed along a new seismic reflection line in the western Qiongdongnan Basin. For the first time, a method is proposed to calculate the time-varying strain rates constrained by the faults growth rates, on basis of which, the predicted basement subsidence is obtained with a basin-and lithosphere-scale coupled finite extension model, and the backstripped subsidence is accurately recovered with a modified technique of backstripping to eliminate the effects of later episodes of rifting on earlier sediment thickness. Results show no residual subsidence in 45–28.4 Ma. But after 28.4 Ma, negative residual subsidence occurred, reached and remained ca. -1000 m during 23–11.6 Ma, and reduced dramatically after 11.6 Ma. In the syn-rift period(45–23 Ma), the residual subsidence is ca. -1000 m, however in the post-rift period(23–0 Ma),it is positive of ca. 300 to 1300 m increasing southeastwards. These results suggest that the syn-rift subsidence deficit commenced at 28.4 Ma, while the post-rift excess subsidence occurred after 11.6 *** with previous studies, it is inferred that the opposite residual subsidence in the syn-and post-rift periods with similar large wavelengths(>10^(2) km) and km-scale amplitudes are the results of transient dynamic topography induced by deep mantle upwelling beneath the central QDNB, which started to influence the basin at ca. 28.4 Ma, continued into the Middle Miocene, and decayed at ca.11.6 Ma. The initial mantle upwelling with significant dynamic uplift had precipitated considerable continental extension and faulting in the Late Oligocene(28.4–23 Ma). After ca. 11.6 Ma, s

关键词： Residual subsidence Deep mantle upwelling Strain rate Qiongdongnan Basin Northwestern South China Sea margin

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：