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Search Results: 1 - 10 of 251947 matches for " <br>XIE Wencai "
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武汉市康养旅游地空间布局及其优化研究
The spatial layout and optimization study of health and wellness tourism destinations in Wuhan

谢文彩,李星明,向 兴,张 祥,<br>XIE Wencai,LI Xingming,XIANG Xing,ZHANG Xiang
- , 2018,
Abstract: 康养旅游是依托良好的生态环境和养生、医疗设备,以休闲养生、康体度假养生、生态疗养、修身养性、养老保健等为目的最终达到身心健康与精神愉悦的各种旅游活动的总和.以武汉市50家康养旅游地为研究样本,运用最邻近指数、Voronoi多边形面积的变异系数、核密度分析以及缓冲区分析,探讨其空间布局.研究发现:1) 康养旅游地呈集聚分布,其内部形成以黄陂木兰天池—木兰山、蔡甸九真山风景区、江夏梁子湖风景区为核心的3个高密集区;2) 康养旅游地分布与交通干线和河流湖泊关系密切.为此提出空间优化建议:新城区发挥自身优势建立特色康养旅游基地,其中黄陂构建高端养老旅游地,蔡甸建立森林康养旅游基地,江夏建设两湖康养旅游基地,新洲建设园艺康养基地,东西湖构建生态康养旅游基地;新城区从主城区吸引康养客源,主城区为新城区提供医疗保障,两者相互协作共同推动武汉市康养旅游的协调发展.
LAYERED MANTLE REFLECTORS IN DABIE-SULU AREAS AND THEIR INTERPRETATION
大别苏鲁地区层状地幔反射体及其解释

YANG WENCAI,<br>杨文采
地球物理学报 , 2003,
Abstract: 深反射地震虽然已广泛应用于地壳上地幔调查,然而,来自地幔的反射体在全世界都还比较少见,尤其是尚未有发现上地幔中多层水平反射体的报道。近年来,作者用24s的深反射地震启示揭示了在大别苏鲁地区岩石圈地幔内存在5组水平的反射体,表明该区具有特殊演化作用形成的上地幔组构,它们可随深度增加分别命名为M1到M5。这些反射体不仅可在地震叠加剖面上看到,有时还可在野外单炮记录上看到。反射体M1对应Mobo面,而M5大概与现今岩石圈底界对应,根据地热资料,苏鲁热岩石圈厚度约为78km。其他3个反射体可能是中生代岩石圈减薄诱发的壳幔作用的结果。根据岩石学与地球化学的数据,在晚中生代中国东部岩石圈的厚度约从150km减薄到约60km,在新生代又略微加厚到平均78km。这一减薄作用引起岩浆底侵并在下地壳产生麻粒岩层,而早侏罗纪扬子克拉通向北的陆-陆俯冲又在上地幔产生榴辉岩层。在双程走时12s处的反射体M2则是麻粒岩层与榴辉岩层的边界,它也是古生代的Moho面。反射体M3出现在14s前后,看来是榴辉岩层的底面,它的下面应保存有残留的古生代上地幔。由于新老岩石圈地幔成分不同,其界面产生反射体M4。这种多层岩石圈地幔反射体的存在表明,所研究地区的地幔结构与中国燕部中生代岩石圈减薄作用有关。同时,由于20世纪80年代以来一直认为上地幔在反射地震上是相对 透明的,多层反射体的发现对这一认识是新的挑战,表明采用爆炸震源与地震反射新技术有可能揭露岩石圈地幔内部结构细节,这些细节也是地幔动力学作用的产物。
Fτ-Coherent Risk Measures
Fτ-Coherent 风险度量

Chen Wencai,Ye Zhongxing,<br>陈文财,叶中行
数学物理学报(A辑) , 2007,
Abstract: 该文提出了一个风险度量的新概念,即定义在任意停时τ上的Fτ-Coherent风险度量.对任一满足Fatou性质的Fτ-Coherent风险调整值度量(即一个Fτ-Coherent风险度量的负值)φτ:L∝(F)→L∞(Fτ),我们都可以用一个Fτ-凸概率测度集来给出它的显式表示.同时我们还证明了一个Fτ-Coherent风险调整值度量叮以用它的可接受头寸集合来表示.
APPLICATION OF PDA AND LDA TECHNIQUES IN MEASUREMENT FOR PHYSICAL CHARACTERISTICS OFBUBBLE-LIQUID FLOW
激光多普勒测速技术在气液两相流中的应用

Zhou Ming Li Wencai,<br>周明,李文采
力学学报 , 1991,
Abstract: A Particle Dynamics Analyzer (PDA) is employed to measure the velocity and diameter of bubbles (measurement ranges between 0-5 m/s and 0-15 mm), the liquid velocities in liquid circulation zone and in bubble-water plumes are measured in two dimensions by using a Laser Doppler Anemometry (LDA) technique. It is shown that the diameter of bubbles is almost a constant at different levels in the vessel. The radial distribution of velocity of bubbles and liquid in two-phase plumes is found to be well represented by a Gaussian function.
SHORT-RANGE ORDER STRUCTURES OF Fe-Ge AMORPHOUS THIN FILMS
Fe—Ge非晶薄膜的短程序结构

WANG Wencai,CHEN Yu,<br>王文采,陈玉
金属学报 , 1989,
Abstract: 用X射线K吸收谱方法研究了Fe_xGe_(1-x)(x=8.7,19.1和28.5%)非晶薄膜的短程序结构。三种合金中,Ge或Fe原子的最近邻结构组态均由Ge,Fe分别形成的两个间距很小的双配位层构成。Fe含量较低的前两种合金,Ge的最近邻结构参数与非晶Ge非常相近,Fe作为Ge的最近邻原子接近于无规的代位式配位。当Fe含量达到28.5at.-%时,相应的非晶薄膜的短程序发生了很大的变化;非晶已偏离连续无规网络结构,显示出朝无规密堆结构变化的趋向。同时,还显示出在该合金中Fe-Ge原子间存在较强的相互作用。
三维移动脉动源格林函数的对称性及其应用
肖汶斌, 董文才br>XIAO Wenbin, DONG Wencai
- , 2015, DOI: 10.11887/j.cn.201502025
Abstract: 为进一步提高三维有航速船舶耐波性预报的计算效率,将对称性引入到移动脉动源格林函数法的速度势求解之中,提出了基于格林函数对称性的水动力快速求解措施。从源点对场点的对称特性出发,推导获得了调和函数的法向偏导数在船体对称线元和面元处的积分对称关系式,开展了对称性在简化边界元积分方程系数矩阵中的应用,进而构建了高效求解三维船舶耐波性能的理论计算方法。数值结果及算例分析表明:水动力计算中移动脉动源格林函数的对称性有利于降低计算量和减少系统内存,且适用于有航速船舶在波浪中的波浪干扰力、运动响应和自由面波形的数值模拟,可拓展至两船水动力干扰及复杂船型的频域水动力分析计算之中。
In order to further improve the computation efficiency of seakeeping prediction for the ships with forward speed, the symmetry property was introduced into the calculations of velocity potentials in the 3-D translating pulsating source Green function method. Based on the Green function′s symmetry, the specific measures were put forward to evaluate the ship hydrodynamics. By the symmetrical magnitude of source point to field point, the integral symmetry expressions of normal derivative of harmonic function at the symmetric line and surface elements were derived and obtained. The symmetrical characteristics were applied to simplify the matrix of coefficient in the boundary integral equation. A theoretical method with high efficiency was presented for the seakeeping performance of 3-D ship advancing in waves. Numerical results and example analysis show that the symmetry property of translating pulsating source Green function is available for the minimization of computation and memory amount and is proved effective in the numerical calculations of wave exciting forces, motion responses and free-surface waveform for the advancing ship in waves. It is expected to extend the symmetrical characteristics of translating-pulsating source Green function to the hydrodynamic analyses of interacting two ships or complex ship form in frequency domain.
一类非线性脉冲免疫接种SIR传染病模型的周期解与分支
Periodic Solution and Bifurcation of an SIR Epidemic Model with Nonlinear Pulse Vaccination

赵文才,刘雨林<br>ZHAO Wencai, LIU Yulin
- , 2015,
Abstract:
STUDIES ON THE CHANGES OF CALCIUM AND CAM DURING FLOWER DIFFERENTIATION OF PEAR
钙和钙调素在梨花芽分化中的动态研究

Peng Shu'ang,Luo Chong,Zhang Wencai,<br>彭抒昂,罗充,章文才
植物科学学报 , 1999,
Abstract: 花芽分化是果树最重要的生理过程之一,而有关钙离子(Ca2+)和钙调素(CaM)的研究是当今生理学研究的热点。许多的研究表明,Ca2+在植物生理代谢的过程中起着越来越重要的调控作用,而它的这些作用是通过CaM来实现的。当细胞受到内外因素的刺激之后,细胞的Ca2+浓度会增加,然后与CaM结合,使得一系列酶系统活化,将刺激的信息转化为具体的生理生化反应,从而左右着代谢的方向〔1~3〕。已有一些报道表明,Ca2+和CaM可能参与了一些植物的花芽分化过程〔4~7〕,但目前直接将Ca与CaM结合起来研究植物…
PHOTOREFRACTIVE COLOR CONVERTER USING AN INDUCED SELF-PUMPED PHASE CONJUGATOR
利用光感应自泵浦方法实现图象的色彩转换

Qiu Yishen,Huang Wencai,Zheng Zhiqiang,Lu Tuansun,<br>邱怡申,黄文财
光子学报 , 1999,
Abstract: Photorefracter color converter using an induced self - pumped phase conjugator isdemonstrated in a photorefractive Bal-x Srx TiO3 crystal. Resolution of 28 lp/ mm has been obtainedfor this converter. Also,this method can be used for the Incoherent-to-coherent converter.
潜艇应急上浮六自由度运动及黏性流场数值模拟
周广礼, 董文才, 欧勇鹏br>ZHOU Guangli, DONG Wencai, OU Yongpeng
- , 2017, DOI: 10.11887/j.cn.201702030
Abstract: 为揭示潜艇应急上浮过程中的强非线性运动及水动力作用规律,基于RANS方程及流体体积模型,针对Suboff标模建立了潜艇应急上浮数值预报方法。通过开展不同纵倾攻角及斜航漂角下全附体模型的水动力计算,验证了该计算方法的有效性,确定了其适用范围,进而结合整体动网格技术模拟了潜艇的应急上浮过程,获得了艇体六自由度运动的时历参数及流场细节信息。数值模拟结果表明该方法能够较合理地描述潜艇上浮的运动规律,也证明了该方法在潜艇上浮多自由度运动及水动力性能研究中的潜力和适用性。
A method to estimate submarine′s strongly nonlinear motion and hydrodynamic performance during emergency ascent was presented. RANS equations and VOF (volume of fluid) model were applied for simulation cases. The oblique towing experiments with different pitch and yaw angles were calculated numerically to verify the effectiveness of the method and obtain the proper application range for a fully appended Suboff model. Therefore, the emergency ascent process of submarine was simulated with integral dynamic mesh strategy, and the time parameters and the detail flow information of submarine under 6DOF (six degree of freedom) motion were obtained. Numerical simulation results show that the method can reasonably describe the motion law for submarine′s emergency ascent and is feasible and powerful in the research about the multi degree of freedom motions and hydrodynamic characteristics of the submarine′s ascent.
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