会议名称：
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)
会议时间：
2009-04-26
会议地点：
武汉
会议论文集名称：
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)论文集
关键词：
URBAN planning;Population forecast;Fluid mechanics in porous media;Percolation theory
摘要：
City population forecast is one of the most important works in urban master planning. The traditional methods forecast city population with strong subjectivity and in intense disorder. They often calculate certain population for several times and in the end get a larger population forecasting number than the real. In this paper, a effective percolation-theory based population-facast method is proposed. The region with lots of cities and rural is viewed as porous media, the population migration in the region is viewed as fluid, cities and rural in the region are viewed as pore. A mathematical model of population flow network is established based on fractured percolation theory. Based on this model, city or region population forcast can be easily calculated in a similar way as calculating the flow in porous media. Population flow density in different time can be easily got through simulation. This new method will benefit the city population forcast application.
会议名称：
The Fifth International Conference on Information Assurance and Security(第五届信息保障与安全国际会议)
会议时间：
2009-08-18
会议地点：
西安
会议论文集名称：
The Fifth International Conference on Information Assurance and Security(第五届信息保障与安全国际会议)论文集
关键词：
digital watermarking;DEM image;stationary wavelet transform;optimization
摘要：
A digital watermarking algorithm is proposed basing on the stationary wavelet transform algorithm to embed the digital watermark in the primitive DEM images and withdraw the watermark from the watermarked DEM images. Considering the characteristic of the DEM images, the embedding position is selected in the relatively gentle terrains by analyzing the slope of the DEM image. The embedding intensity is optimized by an optimization model, of which the objective function is defined as the similarity between the original water mark and the abstracted watermark. The optimization model is then resolved with ant colony optimization algorithm, by which the precision of the data and robustness are guaranteed simultaneously. An example is then given to testify the method proposed which proves that the disturbing the elevation of DEM data is less than 5% and that the robustness of due watermark is high enough to immune 5% random noises. Simultaneously, the disturbing of the image is unnoticeable by human eyesight and the hiding of the watermark is also guaranteed.
摘要：
This Paper derives the differential equation to compute the seepage field based on the Darcy Law and continuity equation, then discrete the differential equation in finite difference method, establish a calculation matrix by changing it into algebraic equation, combined with the boundary condition, the seepage field can be computed. Besides, the seepage of a fill dam with homogeneous material is computed in this modeling, by dividing the grids, considering the boundary condition, the seepage water head is solved and witch can reflect the real engineering. It shows the modeling can compute the similar seepage field to some precision extent.
会议名称：
2009 International Symposium on Intelligent Ubiquitous Computing and Education(2009国际智能普适计算与教育研讨会 IUCE 2009)
会议时间：
2009-05-15
会议地点：
成都
会议论文集名称：
2009 International Symposium on Intelligent Ubiquitous Computing and Education(2009国际智能普适计算与教育研讨会 IUCE 2009)论文集
关键词：
network security;port scanning;vulnerability scanning;remote operating system scanning;libnet;libpcap
摘要：
This paper discusses the network security scanning and some scanning methods which contain port scanning, vulnerability scanning and remote operating system detection are studied. In order to reduce the complexity and get high performance, the architecture of a common network security scanning system based on Libnet and Libpcap is provided and the every module of system is designed and implemented. The key modules include packet constructing, packet sending, packet capture, packet analyzing module and information log analysis module. The methods of packet injection based on Libnet and the packet capture based on Libpcap are presented and it can improve scanning performance and enhance the scalability and expansibility of system.
会议名称：
Information Technology and Applications, 2009. IFITA '09. International Forum on
关键词：
Radar;PLM;B/S mode;module design method
摘要：
Product lifecycle management (PLM) is recognized as one of the leading technologies to facilitate companies overcome ever-increasing challenges. The concept and implementation of Product Lifecycle Management have drawn much attention in both industry and academia. This technology offers companies a novel way to rapidly plan the research, manufacture, sale of the production. So the enterprise can deliver up new products and services much faster and cheaper in an integrated way. This paper introduces the conception of PLM into the project of the RADAR management system and provides the solution according to the demand of Radar Corporation. In this PLM system, we can manage every process of the life circle that includes making, running, repairing, maintenance, destroying by designing serial code, it also establish a stable foundation for CIMS (Computer Integrated Manufacturing System) integrate of corporation in the future. (8 refs.)
作者：
Gan Hai-tao*;Tong Xiao-jun;Jiang Qin;Sang Nong;Kong Xiao-jiang;...
期刊：
DCABES 2009: THE 8TH INTERNATIONAL SYMPOSIUM ON DISTRIBUTED COMPUTING AND APPLICATIONS TO BUSINESS, ENGINEERING AND SCIENCE, PROCEEDINGS,2009年:27-31
通讯作者：
Gan Hai-tao
作者机构：
[Jiang Qin; Tong Xiao-jun; Wang Fang-xiu; Kong Xiao-jiang; Sang Nong; Gan Hai-tao] Wuhan Polytech Univ, Wuhan 430023, Hubei, Peoples R China.
摘要：
With the extensive application of fuzzy C-means(FCM) algorithm and a more profound understanding of objects, it has become a hot spot how to take full advantage of a priori knowledge and the combination of FCM algorithm. In this paper, FCM algorithm with partial supervision is preliminarily discussed and its recent applications of these methods are introduced. A new way to deal with a prior is proposed and the performance of FCM algorithm with partial supervision is illustrated by experimental results which indicate that the algorithm is better than the traditional FCM algorithm. Finally, some remarks on the further research and directions of the method are presented.
会议论文集名称：
SIGGRAPH ASIA '09: ACM SIGGRAPH ASIA 2009 Educators Program
摘要：
Our study aims to develop a basic course for education in terms of interactivity in media arts and design. Interactivity that has been brought by media technologies is a crucial element for a broad range of studies including software interface design and product design as well as media arts and design. Students learning new types of visual communication should cultivate their ability to comprehend media technology and create interaction using it. We developed original toolkits for the training course. This course enables students to create an interactive installation and learn how to interrelate graphic images generated by a program with sensing human actions. Through the process of learning, we expect students to become aware of diverse relations between sense and actions. We will present the details of the course and introduce artworks from students' projects.
摘要：
The test method of shielding effectiveness (SE) based on traditional definition was given and its shortages were analyzed. The measurement of SE using Reverberation Chamber based on statistical property was propounded. The simulation results indicated that sampling at the middle line can reflect the shielding property of enclosures effectively. A new testing system based on the statistic definition and multi-points data collection of SE using Reverberation Chamber has been successfully developed. The SE of a small enclosure was investigated. Meanwhile, the results of repeatability test on traditional definition and statistical definition of SE indicates that the test method of SE based on statistical property has better repeatability and rather for industry application.
作者机构：
[Chen Liming] Leshan Teachers Coll, Leshan, Peoples R China.
会议名称：
14th Youth Conference on Communication 2009
会议时间：
JUL 24-26, 2009
会议地点：
Dalian, PEOPLES R CHINA
会议主办单位：
[Chen Liming] Leshan Teachers Coll, Leshan, Peoples R China.
关键词：
chaotic frequency modulation;output ripple voltage;feedforward active filter;EMI
摘要：
According to the characteristic of the output ripple voltage in switching-power with a chaotic frequency modulation scheme (CFMS): the Output ripple voltage existes in the low frequency band, and the ripple of the waveform followes the modulation signal,which is basically the same as the waveform of the modulation signal, it is difficult to filter out the ripple voltage in traditional methods. Presents a feedforward active filter,the active filter circuit is connected to the output of the switching power supply as a feedback circuit, and then through the transformer, the output ripple voltage will be delivered to the main circuit, which offset the ripple voltage in the main circuit. The emulational results demonstrate that the feedforward active filter can suppress the output ripple voltage effectively.
关键词：
CEMA;EM information leakage;data correlation;DES;SCAs
摘要：
The article analyzes the CMOS logical gate's electric current characteristic under the active status, establishes the electromagnetic information leakage hamming distance model in registers level. Aimed at the Data Encryption Standard(DES) cryptographic system realized by the P89C668 microcomputer, Correlation Electromagnetic Analysis (CEMA) algorithm was described, the choosing of attack point D and the computational method were analyzed, an attack experiment was processed by CEMA, thereby obtaining 48-bits sub-key of the 16(th) round of DES. The result shows that EM information leakage exists in CMOS integrated circuit during work, XOR operation in each round of DES is an attack point. It can provide a basis for implementing protective measures in the cryptographic systems.
作者机构：
Faculty of Earth Sciences, China University of Geosciences, Wuhan, 430074;Department of chemistry and Environmental Engineering, Wuhan Polytechnic University,Wuhan, 430023;Changchun Institute of Optics,Fine Mechanics and Physics ,Chinese Academy of science, Changchun, 130
会议名称：
The 11th Asian Symposium on Information Display(ASID'09)(第11届亚洲信息显示会议)
会议时间：
2009-10-07
会议地点：
广州
会议论文集名称：
The 11th Asian Symposium on Information Display(ASID'09)(第11届亚洲信息显示会议)论文集
摘要：
Response speed of liquid crystal displays(LCD) is contrast to the rotational viscosity of liquid crystal materials. So far, the problem that low-temperature magnitude dependence of viscosity and response time has not been resolved, which has become the bottleneck for development and application of liquid crystal display technology. In this paper, four new self-designed double-ring difluoromethoxybenzene compounds (Fig 1.) were synthesized. They were tested by IR, 1H NMR, 13C NMR, 19F NMR and MS. Their viscosities at different temperature were also tested and analyzed by AR500 liquid dynamic rheometer. It was found that they not only were super low viscosity and very small temperature dependence, but also can be used as liquid crystal solvent instead of ester components to reduce the viscosity of mixed liquid crystal materials and the low-temperature dependence of viscosity effectively. Finally, we can get the low viscosity liquid crystals at low temperature. It will have a positive meaning to solve the problem of low-temperature response speed of LCD.
摘要：
Based on fluid-solid interaction mechanics theory, a coupled mathematical model for describing the slope stability of landfill under the condition of rainfall was developed. The model is used to evaluate the safety of the slope. The model simulates the effect of the slope gradient ratio and the slope angle on the slope stability under the different conditions of rainfall in the return periods. Results show that slope safety factor in the different rainfall conditions decreases with the increase in rainfall of time. When the slope gradient ratio is 1:2.5 and 1:3.0, slope safety factor decreased slowly in the value of the allowed range. Therefore, the theoretical basis is more credible provided for designing and appraising stability of the landfill, based on the assessment of the effect of slope gradient ratio on the slope stability in the different rainfall conditions of the return periods.
