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Search Results: 1 - 10 of 165370 matches for " 范子梁Zhang Wan "
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日照-连云港地区重磁异常特征及其构造意义
Gravity and Magnetic Anomaly Characteristics and Its Geological Interpretation in Rizhao and Lianyungang Areas

张婉,张玄杰,佟晶,
Zhang Wan
, Zhang Xuanjie, Tong Jing, Fan Ziliang

地球科学(中国地质大学学报) , 2018, DOI: 10.3799/dqkx.2018.518
Abstract: 航空重力、磁力测量是解决海陆过渡区地球物理资料不连续问题的有效途径,所获取的数据为进一步认识苏鲁造山带西段断裂展布、大地构造属性等基础地质问题提供了科学依据.基于最新高精度航空重磁数据,编制了日照-连云港地区1∶25万重力、磁力异常图,结合区域地质资料,分析重、磁异常特征,在日照-连云港地区圈定了郯庐断裂带、桑墟-连云港断裂、东海-赣榆断裂、五莲-桃园断裂等基底断裂构造.研究认为苏鲁造山带南部边界为桑墟-连云港断裂(连黄断裂),以该断裂为界,北侧基底为华北板块组成部分,断裂南侧为下扬子板块基底;以东海-赣榆断裂为界,苏鲁造山带可分为南部和北部,两部分在后期构造活动方面差异显著.
Airborne gravity and aeromagnetic data are very effective and important for solving the basic geological structure problems. Based on the newly acquired high-precision airborne gravity and aeromagnetic data, the 1∶250 000 gravity and magnetic anomalies map were compiled, the gravity and magnetic field characteristics with regional geological and geophysical materials were analyzed, the basement faults including Tanlu fault belt, Sangxu-Lianyungang fault belt, Donghai-Ganyu fault belt and Wulian-Taoyuan fault belt were recognized. It is believed that the south boundary of Sulu orogenic belt is Sangxu-Lianyungang fault, the northern basement of the fault belongs to North China plate and the southern basement belongs to the Lower Yangtze plate. Bounded by Donghai-Ganyu fault belt, the Sulu orogen can be divided into southern and northern segment, which have quite different tectonic movements
NUMERICAL STUDY ON DRAG COEFFICIENT OF AIR OVER WELL-DEVELOPED WIND WAVE
风浪充分发展下海面阻力系数的数值研究

Zhang Zifan,Li Jiachun,
,李家春

力学学报 , 1997,
Abstract: 考虑海气界面附近大气边界层内海良充分发展情况下的海气动量变换。根据Donelan的观点建立海气界面模型,采用k-ε模式以计算湍流流场。所得流场结构包括风速,湍流动能,湍能耗散及湍流粘性系数等都较合理,计算的海面阻力系数CD在中等风速时与实测结果符合良好。
A MCA model for molecular diffusion in turbulent reactive flows
化学反应流中分子扩散的二点封闭MCA模型

Zhang Zifan He Guowei,
,何国威

力学学报 , 2004,
Abstract: In the PDF approach of turbulent reactive flows,the convection and reaction terms are closed but the molecular diffusuion term is unclosed.The currently existing models for the molecular diffusion are either empirical or introduced via external parameters,and it has been verified that they are not valid for such physical processes as the diffusion process.In this paper,a stochastically mapping approximation approach is developed to model the effect of molecular diffusion.A length scale is introduced by a two-point joint probability density function,to account for the evolutions of the conditional diffusion.Numerical simulation shows that the approach is able to predict the evolution of the variances,dissipation rates,conditional diffusion and PDFs in the diffusion process.
The Variations of Atmospheric Precipitable Water over Longitudinal Range-Gorge Region (LRGR) in Southwestern China
中国西南纵向岭谷地区可降水量的变化特征

ZHANG Wan-cheng,WAN Yun-xi,ZHANG Wan-cheng,XIAO Zi-niu,
万云霞
,

自然资源学报 , 2008,
Abstract: 利用NCEP/NCAR 1948~2002年月平均比湿、风场以及高度场等再分析资料,对纵向岭谷及周围地区的多年平均气柱可降水量及其月、季节变化以及年际和年代际变化特征进行了分析。结果表明,纵向岭谷地区可降水量具有明显的月际、季节、年际和年代际变化。在纵向岭谷地区,气柱平均可降水量季节变化明显。四季都为南湿北干的分布,夏季可降水量含量最大,冬季最小,云南大气含水量的分布在整体上大致为西北东南向的“凹”字形。纵向岭谷可降水量的月际变化反映了纵向岭谷地区南北向通道作用和东西向阻隔作用。夏季可降水量在25°N附近、98.5°E附近以及106°E附近地区发生了明显变化。夏季、冬季纵向岭谷区的可降水量变化具有明显的年际和年代际变化特征。纵向岭谷区夏季可降水量在70年代初发生了年代际变化;冬季可降水量在20世纪50年代中期、60年代后期以及80年代初期发生了年代际变化。图6参10
基于背景图像的视频图像压缩感知重构关键技术研究
,赖河木,,冬梅,万其卫
包装工程 , 2014,
Abstract: 目的 针对视频序列相邻帧图像之间的相关性, 提出了基于帧间差分的背景图像的视频图像重构算法。方法 利用前2帧的重构图像求得背景图像, 作为下一帧图像重构的先验知识。结果 明显提高了重构图像的质量, 同时也减少了重构图像所需时间。结论 将帧间差分法与压缩感知重构算法相结合得到的视频重构算法, 在视频图像重构的质量和速度上都有明显优势。
ANALYSIS FOR THE COMPOSITION OF MONOSACCHAR-OSE IN THE CAPSULAR POLYSACCHARIDE OF CLOSTRIDIUM DIFFICILE
艰难梭菌荚膜多糖单糖组成的气相色谱分析

Fan Ziwen,Ruan Guorui,Zhang Xueping,
,阮国瑞,张雪萍

微生物学通报 , 1994,
Abstract: The capsular polysaccharide(CPS)of two strains of Clostridium difficle(Cd)were pu-rified by Acetone precipitation.The CPS was identified homogeneous by Sepharose 4B columnchromatography and cellulose acetate film electrophoresis.According to the results of gas chro-matography;the CPS of Cd is mainly composed of D-glucose,D-mannose and D-galactose.
THE DETERMINATION OF THE MOLECULAR WEIGHT OF CAPSULAR POLYSACCHARIDES FROM CLOSTRIDIUM DIFFICILE
一种测定艰难梭菌荚膜多糖分子量的简便方法

Ruan Guorui,Fan Ziwen,Zhang Xueping,
阮国瑞
,,张雪萍

微生物学通报 , 1994,
Abstract: 本文采用两种规格的Sepharose4B凝胶层析柱,测定了艰难梭菌荚膜多糖的分子量,并建立了一种较为简便、敏感的测定方法,对进一步研究英膜多糖的生物学特性提供了有利条件。
Research on Influencing Factors of Web 3D User Experience with Grounded Theory  [PDF]
Jiangping Wan, Hui Zhang
iBusiness (IB) , 2011, DOI: 10.4236/ib.2011.33031
Abstract: The influencing factors on Web 3D User Experience are studied for online pavilion of Shanghai World Expo with grounded theory method. We discover the four influencing factors as follow: web site quality, external environmental factor, user internal factor and recommendation, and the influencing factor model of Web 3D user experience is tried to established. We also do case study for the online Guangdong pavilion of Shanghai World Expo in order improve the process to transfer original wonderful, innovative ideas into Web 3D more perfective. Finally, the areas needing further investigation are put forward.
Research on the Maturity Model of Conflict Management in Engineering Project  [PDF]
Wan Zhang, Hui Zhao
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.23002
Abstract:

Integrated Project Management Maturity proposed a new concept. It is “Project Conflict Management Maturity”. It established a new concept of maturity level, established an evaluation index system on Project Conflict Management Maturity and used the multi-level fuzzy comprehensive evaluation method combined with the Project Management Maturity model to construct the maturity model of Project Conflict Management. Then, through numerical examples, it evaluated the score of object, got the maturity level of conflict management of the study project, verified the feasibility of the model for solving Project Conflict Management, provided some bases for solving problems of Project Conflict Management and had a certain practical significance about this problem.

A Comparative Study of the Refinancing Announcement Effect of Listing Corporation in China  [PDF]
Wan Xiao, Yukun Zhang
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.88118
Abstract: The paper chooses the listing Corporations which refinanced from June 1, 2006 to December 31, 2014 as samples to test and compare the announcement effect of five refinance modes, which are public issuance, non-public issuance, allotment and issuance of corporate bonds, and convertible bonds. Study has showed that the announcement effect of non-public issuance is positive and allotment is negative in large confidence degree, while public issuance and convertible bonds issuance show negative in a lower confidence degree, and issuance of corporate bonds isn’t significant. Therefore, China’s capital market favors non-public issuance most and regard convertible bonds as substitute, think allotment bearish widely, while see light issuance of corporate bonds. So, we must develop incentive effect of convertible bonds, Strengthen corporate debt’s constraint mechanism, regulate the behavior of the big shareholders in allotment. It is found refinancing information leakage phenomenon in empirical research which should cause the attention of regulators.
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