检索结果-南通市图书馆

Antithrombogenic investigation and biological behavior of cultured human umbilical vein endothelial cells on Ti-O film

引用

Science china(Technological Sciences) 2006年第1期49卷 20-28页

作者： CHEN Junying1. WAN Guojiang1. LENG Yongxiang1. YANG Ping1. SUN Hong1. WANG Jin1. HUANG Nan1. CHEN Huaiqing2.& TANG Rong2.1. College of Materials Science and Engineering, Key Laboratory of Advanced Materials Processing of Chinese Education Ministry, Southwest Jiaotong university, chengdu 61.031.{2. 2. School of Basic Medical Sciences, West{2. Center of Medical Sciences, sichuan university, chengdu 61.064,{2. 1. College of Materials Science and Engineering Key Laboratory of Advanced Materials Processing of Chinese Education Ministry Southwest Jiaotong University Chengdu 610031 China 2. School of Basic Medical Sciences West China Center of Medical Sciences Sichuan University Chengdu 610064 China

Our previous research results have shown that the Ti-O films with appropriate characteristics possess great potentials for biomaterials application. In this paper, using plasma immersion ion implantation and deposition (PIII-D), titanium oxide thin films are fabricated onto silicon wafer. The antithrombogenesis of films is evaluated in vitro through the platelet adhesion investigation. The biological behavior of human umbilical vein en-dothelial cells (HUVEC) on the film surface is investigated in vitro by endothelial cell (EC) culture. Our results reveal that the crystalline Ti-O films exhibit attractive blood compatibil-ity. The in vitro HUVEC-cultured investigation of Ti-O film surface has justified that the biological behavior of HUVECs on different structure surfaces is significantly different. The adherence, growth and proliferation of HUVECs to the crystalline Ti-O film surface are in order, by forming a perfect single layer, preserving the natural original shape and dis-playing the cobblestone road metal rank, and obviously superior to that on the amorphous Ti-O film surface. According to our study, the crystalline Ti-O film, with proper microstruc-ture, is helpful for seeding ECs and can be used as a functional surface for the adherence and growth of ECs.

关键词： plasma immersion ion implantation and deposition, Ti-O film, antithrombogenesis, endothelial cell.

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

Nonlinear Analysis on Vertical Distribution of Suspended Load

引用

Communications in Nonlinear Science and Numerical Simulation 1998年第2期3卷 19-23页

作者： Fuquan WANG, Houqiang LI and Jing DING (sichuan {1. {2.,chengdu,61.064,china) sichuan {1. {2. Chengdu 610064 China

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｓｔｕｄｉｅｓｏｎｖｅｒｔｉｃａｌｄｉｓｔｒｉｂｕｔｉｏｎｏｆｓｅｄｉｍｅｎｔｉｎｎａｔｕｒａｌｒｉｖｅｒｓｈａｖｅｉｍｐｏｒｔａｎｔｔｈｅｏｒｅｔｉｃａｌｍｅａｎｉｎｇｓａｎｄｅｎｇ... 详细信息

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｓｔｕｄｉｅｓｏｎｖｅｒｔｉｃａｌｄｉｓｔｒｉｂｕｔｉｏｎｏｆｓｅｄｉｍｅｎｔｉｎｎａｔｕｒａｌｒｉｖｅｒｓｈａｖｅｉｍｐｏｒｔａｎｔｔｈｅｏｒｅｔｉｃａｌｍｅａｎｉｎｇｓａｎｄｅｎｇｉｎｅｒｉｎｇａｐｐｌｉｃａｔｉｏ...

关键词： turbulence fractal sediment vertical distribution

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A new real-time eye tracking based on nonlinear unscented Kalman filter for monitoring driver fatigue

引用

控制理论与应用（英文版） 2010年第2期8卷 181-188页

作者： Zutao ZHANG 1., 2., Jiashu ZHANG 2.(1.School of Mechanical Engineering, Southwest Jiaotong university, chengdu {2. 61.031. china 2.{2. Key Lab of Signal and Information Processing, Southwest Jiaotong university, chengdu {2. 61.031. china) School of Mechanical Engineering Southwest Jiaotong University Chengdu Sichuan China sichuan Key Lab of Signal and Information Processing Southwest Jiaotong University Chengdu Sichuan China

A new scheme for driver fatigue detection is presented, which is based on the nonlinear unscented Kalman filter and eye tracking. Assuming a probability distribution than to approximate an arbitrary nonlinear function or transformation, eye nonlinear tracking can be achieved using an unscented transformation (UT), which adopts a set of deterministic sigma points to match the posterior probability density function of the eye movement. Driver fatigue can be detected using the percentage of eye closure (PERCLOS) framework in a realistic driving condition after the eye nonlinear tracking. This system was tested adequately in realistic driving environments with subjects of different genders, with/without glasses, in day/night driving, being commercial/noncommercial drivers, in continuous driving time, and under different road conditions. The last experimental results show that the proposed method not only improves the robustness for nonlinear eye tracking, but also can provide more accurate estimation than the traditional Kalman filter.

关键词： Eye tracking Unscented Kalman filter (UKF) Fatigue detection PERCLOS

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

Range inclusion of operators on non-archimedean Banach space

引用

Science china {1. 2010年第12期53卷 3215-3224页

作者： WANG PengHui 1 & ZHANG Xu 2.3 1 School of mathematics, Shandong university, Jinan 2.0100,{2. 2.Key Laboratory of Systems and Control, Academy of mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190,{2. 3 School of mathematics, sichuan university, chengdu 61.064,{2. 1. School of mathematics Shandong University Jinan 250100 China2. Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China3. School of Mathematics Sichuan University Chengdu 610064 China

In this paper, we establish some range inclusion theorems for non-archimedean Banach spaces over general valued fields. These theorems provide close relationship among range inclusion, majorization and factorization for bounded linear operators. It is found that these results depend strongly on a continuous extension property, which is always true in the classical archimedean case, but may fail to hold for the non-archimedean setting. Several counterexamples are given to show that our results are sharp in some sense.

关键词： range inclusion majorization factorization non-archimedean Banach space continuous extension property

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

基于车辆轨迹数据的港口集卡预约系统配额方案优化

引用

大连海事大学学报 2024年

作者：马文耀王玉孙世超 1.广东海洋大学船舶与海运学院 2.大连海事大学交通运输工程学院广东海洋大学船舶与海运学院大连海事大学交通运输工程学院

港口集卡预约系统的应用能显著减少集卡在港周转时间，提升码头运营效率，进而增强港口竞争力。然而，在优化预约配额方案时，现有方法面临诸多挑战，包括动态性、随机性捕捉难，理论假设局限，以及数据获取处理复杂等。为此，本文创新... 详细信息

港口集卡预约系统的应用能显著减少集卡在港周转时间，提升码头运营效率，进而增强港口竞争力。然而，在优化预约配额方案时，现有方法面临诸多挑战，包括动态性、随机性捕捉难，理论假设局限，以及数据获取处理复杂等。为此，本文创新性地利用集卡的GPS轨迹数据，全面捕获了集卡从到达港口至完成作业的全过程周转时间，并基于此建立了单位预约时间窗口内集卡到达数量与其在港总周转时间之间的映射关系。进一步地，利用该映射关系，构建了一个更为精确简洁的配额优化模型，并对集卡预约配额方案进行了优化求解。实验结果表明，优化后的预约配额方案有效减少了高峰期的集卡到达量，同时提高了低谷期的车辆到达数，从而大幅节省了集卡在港的总周转时间。这一成果不仅有助于缓解港口的拥堵压力，也为进一步提升港口运营效率提供了有力支撑。

关键词：集卡预约系统配额方案优化 GPS轨迹数据车辆周转时间

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

ORDER RESULTS FOR ALGEBRAICALLY STABLEMONO-IMPLICIT RUNGE-KUTTA METHODS

引用

Journal of Computational mathematics 1999年第6期17卷 639-644页

作者： Ai-guo Xiao(1. Department of mathematics, Xiangtan {1., Xiangtan 41.1.5,{2.2. ICMSEC, Chinese Academy of Sciences, Beijing 1.080,{2.) Xiangtan Univ Dept Math Poona 411005 Maharashtra India Chinese Acad Sci ICMSEC Beijing 100080 Peoples R China

It is well known that mono-implicit Runge-Kutta methods have been applied in the efficient numerical solution of initial or boundary value problems of ordinary differential equations. Burrage (1.94) has shown that the order of an s-stage monoimplicit Runge-Kutta method is at most s+1.and the stage order is at most 3. In this paper, it is shown that the order of an s-stage mono-implicit Runge-Kutta method being algebraically stable is at most min((s) over tilde, 4), and the stage order together with the optimal B-convergence order is at most min(s, 2., where [GRAPHICS]

关键词： ordinary differential equations mono-implicit Runge-Kutta methods order algebraical stability

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

Research on the method for retrieving soil moisture using thermal inertia model

引用

Science china Earth Sciences 2006年第5期49卷 539-545页

作者： LIU Zhenhua1.& ZHAO Yingshi2.1. Information College, South{1. Agricultural university, Guangzhou 51.642.{1. 2. Graduate university of Chinese Academy of Sciences, Beijing 1.0049,{1. 1. Information College South China Agricultural University Guangzhou 510642 China 2. Graduate {1. of Chinese Academy of Sciences Beijing 100049 China

In order to improve accuracy of soil moisture inversion using remote sensing, a new thermal inertia model is proposed in this paper. The improved model needs only surface maximum temperature as the temperature parameter input instead of input of the surface temperature difference, as well as the surface sensible and latent fluxes are introduced into boundary conditions of thermal conductivity equation. Furthermore, surface soil conductive heat transfer equation of two-layer model is used to solve the soil thermal inertia so that the remote sensing thermal inertia method can be ap- plied to regions with better-covered vegetation, but usually only for the bare areas or worse vegetation covered areas. The model has been tested at several locations in the area of west Inner Mongolia. Comparing the simulation of the new model with the measurements obtained by apparent thermal inertia and by field test, the result shows that the inertia thermal model can be used to estimate soil moisture in more reasonable accuracy.

关键词： thermal model, thermal conductivity equation, soil initial, sensible flux, latent flux, two-layer model.

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

Variational minimizing parabolic and hyperbolic orbits for the restricted 3-body problems Dedicated to my Teacher Professor Yang Wannian on the Occasion of his 75th Birthday

引用

Science china {1. 2012年第4期55卷 721-725页

作者： ZHANG ShiQing Department of mathematics and Yangtze Center of mathematics,{2. university,chengdu 61.064,china 1. Department of mathematics and Yangtze Center of mathematics Sichuan University Chengdu 610064 China

Using variational minimizing methods,we prove the existence of the odd symmetric parabolic or hyperbolic orbit for the restricted 3-body problems with weak forces.

关键词： restricted 3-body problems variational minimizers odd parabolic orbits odd hyperbolic orbits

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

A new orthogonality relationship for orthotropic thin plate theory and its variational principle

引用

Science china(Physics,Mechanics & Astronomy) 2005年第3期48卷 371-380页

作者： LUO Jianhui 1., LONG Yuqiu 2.& LIU Guangdong 1.1. College of Civil Engineering, Hunan {1., Changsha 41.082. china 2. Department of Civil Engineering, Tsinghua {1., Beijing 1.0084, china 1. College of Civil Engineering Hunan University 410082 Changsha China 2. Department of Civil Engineering Tsinghua University 100084 Beijing China

The thought how dual vectors are constructed in a new orthogonality relationship for theory of elasticity is generalized into orthotropic thin plate bending problems by using the analogy theory between plane elasticity problems and plate bending problems. Dual differential equations are directly obtained by using a mixed variables method. A dual differential matrix to be derived possesses a peculiarity of which principal diagonal sub-matrixes are zero matrixes. Two independently and symmetrically orthogonality sub-relationships are discovered. By using the integral form for elastic bending theory of orthotropic thin plate the orthogonality relationship is demonstrated. By selecting felicitous dual vectors a new orthogonality relationship for theory of elasticity can be generalized into elastic bending theory of orthotropic thin plate. By using the integral form a variational principle which is relative to differential form and a whole function expression are proposed.

关键词： theory of elasticity, thin plate theory, dual vectors, orthogonality relationship, orthotropic, variational principle.

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

Numerical simulation of the efficiency of mixing in heterogeneous microchannels with patterned surface potentials

引用

Progress in Natural Science:Materials International 2006年第12期16卷 1322-1328页

作者： ZHANG Kai~1. LIN Jianzhong~ 1.2.** and LI Huijun~1.1. State Key Laboratory of Fluid Power Transmission and Control, Zhejiang {1., Hangzhou 31.02., china 2. china Jiliang {1., Hangzhou 31.01., china) [a]State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hanghou China [b]china Jiliang {1. Hangzhou China

The mixing of samples in heterogeneous microchannels with a periodically stepwise surface potential was analyzed numerically using the control volume method. The equations describing the wall potential and external potential were solved first to get the distribution of wall potential and external potential, respectively, then the momentum equation was solved to get the developed flow field. Finally, the mass transport equation was solved to get the concentration field. The simulation results show that the distribution of samples at the inlet of the microchannel determines its theoretical value of concentration, therefore, the pattern of the distribution of samples at the inlet and its corresponding velocity can be changed to get the desirable concentration of solute. The heterogeneous wall potential almost has no effect on the mixing of samples in two-inlet microfluidic devices. For three-inlet microfluidic devices, the comprehensive ability of transportation and mixing has an optimization when the ratio of periodic length of wall potential to the height of the microchannel is about 4.88. The above conclusions are helpful to the optimization of the design of microfluidic devices.

关键词： microchannel mixing efficiency electroosmosis numerical simulation.

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

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：