检索结果-南通市图书馆

An Efficient Representation of Quadtrees and Bintrees for Multiresolution Terrain Models

在线全文

学校读者我要写书评

暂无评论

Geo-Spatial Information Science 2011年第3期14卷 198-206页

作者： Yusnier valle José Ortiz Center of Geoinformatics and Digital Signals University of Informatics Sciences Dean of the Faculty 1 University of Informatics Sciences

A space-filling curve in 2,3,or higher dimensions can be thought as a path of a continuously moving *** its main goal is to preserve spatial proximity,this type of curves has been widely used in the design and implementation of spatial data structures and nearest neighbor-finding *** paper is essentially focused on the efficient representation of Digital Ele-vation Models(DEM) that entirely fit into the main *** propose a new hierarchical quadtree-like data structure to be built over domains of unrestricted size,and a representation of a quadtree and a binary triangles tree by means of the Hilbert and the Sierpinski space-filling curves,respectively,taking into account the hierarchical nature and the clustering properties of this kind of *** triangulation schemes are described for the space-filling-curves-based approaches to efficiently visualize multiresolu-tion surfaces.

关键词： bintrees quadtrees space-filling curves spatial data structures digital terrain models

在线全文

学校读者我要写书评

暂无评论

布拉德伯里工作坊综合体

世界建筑导报 2024年第2期39卷 126-128,F0003页

作者： Maegan Icke Elena Gruber Roxani Tseranidou Margherita Zompa Carolina Borgatti Ezmira Peraj Ainhoa valle French+Tye(摄影) 不详

布拉德伯里工作坊综合体建筑位于达尔斯顿吉勒特广场,现已重新向新老租户开放。新大楼涵盖600平方米经济适用工作空间的翻新、10个迷你零售单元的更换,以及在两层扩建部分中打造近500平方米的额外工作区域。布拉德伯里工作坊综合体是该... 详细信息

布拉德伯里工作坊综合体建筑位于达尔斯顿吉勒特广场,现已重新向新老租户开放。新大楼涵盖600平方米经济适用工作空间的翻新、10个迷你零售单元的更换,以及在两层扩建部分中打造近500平方米的额外工作区域。布拉德伯里工作坊综合体是该地区以社区为中心、最独特的公共空间,代表了该建筑类型发展历程的未来。

关键词：工作坊扩建部分公共空间综合体发展历程

Novel approaches for the development of peripheral nerve regenerative therapies

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2015年第11期10卷 1743-1745页

作者： Felix Beyer Patrick Küry Department of Neurology Medical Faculty Heinrich-Heine-University

Schwann cells are the myelinating glial cells of the peripheral nervous system（PNS）.By establishing lipid-rich myelin sheaths around large-caliber axons,they ensure that electrical signal transmission is accelerated-a process referred to as saltatory signal *** from this prominent physiological function,these cells also exert important pathophysiological roles in PNS injuries or dis- eases. In contrast to the central nervous system （CNS）, the adult PNS retains a remarkably high degree of intrinsic re- generation. As a consequence, transected axons and dam- aged myelin sheaths can be repaired and nerve functional- ity can be restored. This spontaneous regenerative capacity depends on （inter） actions of macrophages, neurons, and Schwann cells.

关键词： cell Novel approaches for the development of peripheral nerve regenerative therapies FTY IVIG PNS Figure

Chiral separation of triazole pesticide enantiomers by high performance liquid chromatography

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 1997年第6期15卷 528-533页

作者： Yang, GS Gao, ry Wang, QS Shen, HX Shandong Univ Dept Chem Jinan 250100 Shandong Peoples R China Nankai Univ Natl Lab Elementoorgan Chem Tianjin 300071 Peoples R China Nankai Univ Dept Chem Tianjin 300071 Peoples R China

Four triazole enantiomers of diclobutrazol (erythro form) (1), paclobutrazol (erythro form) (2), diniconazole (3) and uniconazole (4) have been separated by high performance liquid chromatography (HPLC) on chiral stationary phase (CSP) OA-4700. Chromatographic data, and a chiral recongnition model are presented for the separation of these pesticide enantiomers. The influence of column temperature and composition of mobile phase have been described.

关键词： triazole pesticide enantiomeric separation chiral stationary phase (CSP) high performance liquid chromatography (HPLC)

Electrochemistry of samarium in lithium-beryllium fluoride salt mixture

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2011年第8期29卷 798-803页

作者： Martin Straka Michal Korenko Frantisek Lisy Lórant Szatmáry Department of Fluorine Chemistry Nuclear Research Institute Rez plc 250 68 Husinec-Rez 130 Czech Republic Institute of Inorganic Chemistry Slovak Academy of Sciences Dubravska cesta 9 SK-845 36 Bratislava Slovakia

The electrochemical behaviour of samarium was investigated in LiF-BeF2 system on an inert （Mo） electrode by cyclic voltammetry and chronopotentiometry at 804, 833, 847 and 872 K. Redox process Sm3＋＋e–→Sm2＋ was recognized and analysed. Cyclic voltammetry data suggested that at potential sweep rates lower than 0.25 V/s, the reduction was limited by the diffusion of Sm3＋ ions. It was not possible to observe reduction process of Sm2＋＋2e–→Sm0 due to insufficient electrochemical stability of LiF-BeF2. Diffusion coefficients of Sm3＋ ions in LiF-BeF2 were calculated from voltammetric and chronopotentiometric data in the temperature range 804–872 K. Diffusion coefficient values obeyed Arrhenius law. Activation energy was calculated to be 102.5 kJ/mol.

关键词： spent fuel reprocessing pyrochemical partitioning electrochemical separation molten fluorides LiF-BeF2 samarium rare earths

ALIZEXOL　A．A　NOVEL　PROTOSTANE　TYPE　OF　TRITERPENE　FROM　ALISMA　ORIENTALIS（SAM）．JUZEP

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1995年第8期6卷 675-678页

作者： Zeng, L Pen, X Zhang, ry Beijing Med Univ Sch Pharmaceut Sci Dept Phytochem Beijing 100083 Peoples R China

A novel triterpene of protostane type alizexol A(1).the first compound of this class having a substituted tetraltydropyran *** been isolated from the rhizome of Alisma orientalis (Sam) *** structure was elucidated by ...

关键词：

THE　SYNTHESIS　OF　O－MONOSACCHARIDYL－METHOXYCARBONYLPHOSPHONAMIDATES　BY　ARBUZOV　REACTION

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 Chemical Letters 1995年第1期6卷 23-26页

作者： Chen, ry Chen, XR Li, H Nankai Univ Inst Elementoorgan Chem Tianjin 300071 Peoples R China

For the synthesis of O-monosaccharidyl-methoxycarhon a new method in which Arbuzov reaction of monosaccharidylphosphoramidite with methyl chloroformate is the key *** reported. Thus,a number of novel O-monosaccharidyl...

关键词：

FLIGHTLAB^(TM) modeling for real-time simulation applications

在线全文

学校读者我要写书评

暂无评论

International Journal of Modeling, Simulation, and Scientific Computing 2017年第4期8卷 25-42页

作者： Ronald Du val Chengjian He Advanced Rotorcraft Technology Inc.SunnyvaleCaliforniaUSA

Modeling and simulation are used to support a wide range of applications including design,analysis,operations research,test and evaluation,training,*** application has different fidelity requirements and computational ***,a variety of models are required to support a single aircraft type throughout its life *** and configuration management of this array of models is *** a software tool that supports selective fidelity modeling and simulation to insure trace-ability and commonality between models,ranging from the comprehensive models required for design to the real time models required for training and hardware-in-the-loop *** a single tool with this range of modeling options greatly enhances the configuration management *** once the highest fidelity,comprehensive,model is validated,it can be used to provide reference data for validation of simpler models,thereby expediting the validation process for all levels of *** paper describes the real-time simulation capability of FLIGHTLABTMmodels and their trace-ability to higher level FLIGHTLABTMmodels.

关键词： Rotorcraft modeling simulation real-time validation selective fidelity helicopter FLIGHTLABTM

Influence of splanchnic vascular infusion on the content of endotoxins in plasma and the translocation of intestinal bacteria in rats with acute hemorrhage necrosis pancreatitis

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

World Journal of Gastroenterology 2000年第4期6卷 577-580页

作者： Qin ry Zou SQ Wu ZD Qiu FZ Tongji Med Univ Tongji Hosp Dept Surg Wuhan 430030 Hubei Province Peoples R China

The main reason for the death of the patient with acute hemorrhage necrosis pancreatitis (AHNP) is pancreatic infection and multi-organ failure caused by endotoxemia and intestinal bacterial translocation[1-7]. However, the pathogenesis of endotoxemia and intestinal bacterial translocation remains a question[8-10]; moreover, no effective method of prevention and cure for it has been found till now[11 -15] In the present study, we infused low dose dopamine and low molecular weight dextran through the catheters to abdominal aorta and portal vein, and observed its influence on the endotoxin concentration in plasma and the rate of translocation of intestinal bacteria in AHNP rats.

关键词： acute hemorrhage necrosis pancreatitis microcirculation/splanchnic organ endotoxins/plasma intestinal bacterial translocation