摘要：
Following the theory of linear piezoelectricity, we analyzed propagation of guided waves in layered piezoelectric structure. The pattern is a piezoelectric plate sandwiched between two piezoelectric half spaces. The waves propagate near intermediate plate. From this, we get precise dispersion relation which can be changed into to piezoelectric surface acoustic waves. The result will help us to know better about and improve acoustic wave devices.
作者机构：
Architecture and Urban Planning School, Hunan City University Hunan City University Yiyang, P.R .Chi;Economic Management Department YiYang Vocational College Yiyang, P.R .China
会议名称：
2011 3rd International Conference on Computer Engineering and Applications(2011第三届计算机工程与应用国际会议 ICCEA2011)
会议时间：
2011-07-15
会议地点：
海口
会议论文集名称：
2011 3rd International Conference on Computer Engineering and Applications(2011第三届计算机工程与应用国际会议 ICCEA2011)论文集
摘要：
With the rapid development of botnet, the Internet has been facing the growing and disastrous threats. These threats can disable the infrastructure and cause the financial damages, which leads to a severe challenge for the global network security. In order to defense and counter the botnet, the detection is absolutely the basis. Therefore, the research on botnet detection has recently become a hot topic in the field of network security. After analyzing the proposed detection techniques, the authors present the basic process of botnet detection, and make classification for these techniques. Further more, according to the different stages of the life cycle of botnet, i.e., propagation, infection, communication and attack, they go into detail about main idea, detection process, merits and shortcomings of the existing techniques. Then, they summarize the approaches and the corresponding algorithms used in the detection techniques, propose the evaluation indices in the six dimensions of source, scope, rea l-time, accuracy, applicability and flexibility, and compare the representative techniques based on these indices. Later, they discuss the key issues of botnet detection in the fields of multi-source information collection and fusion, essential feature extraction, detection of communication and behavior, correlation analysis and detection architecture. Finally, future research trends are reviewed.
摘要：
Pre-stressed concrete continuous rigid frame bridges have been widely used for modern long-span bridges due to its advantages, such as comfortable for travelling, easy to be constructed and maintained etc. However, cracks and excessive mid-span sag of box girders generally exist in many built bridges of this kind during service, and because of its large size and the complex natural environment, it is particularly important to study the long-term performance based on the long-term field measurements. In this paper, a high-pier & long-span pre-stressed concrete continuous rigid-frame bridges, with five-spans (106m+3×200m+106m), was taken as the research object, by pre-embedding strain sensors in mid-span sections and root sections on box girders, field-tests for stress variation were conducted in extreme weather conditions (ie, the hottest and coldest in one year) after its completion in two years, providing tested data for studying long-term performance of bridges similar to the same kind.
作者机构：
Architecture and Urban Planning School, Hunan City University Hunan City University Yiyang, P.R .Chi;Network Center,Hunan City University Hunan City University Yivang, P.R .China
会议名称：
2011 3rd International Conference on Computer Engineering and Applications(2011第三届计算机工程与应用国际会议 ICCEA2011)
会议时间：
2011-07-15
会议地点：
海口
会议论文集名称：
2011 3rd International Conference on Computer Engineering and Applications(2011第三届计算机工程与应用国际会议 ICCEA2011)论文集
摘要：
The paper presents a selected indicators and algorithms which the passed Netflow-based anomaly detection technology were analyzed and the Netflow data of the compus network was studied from different grain-size and different angle for a long time. Then integration-indicators and Time Window Comparision Algorithms were introduced Integration-indicators which remove the non-stationary factors can reflect the characteristics of network traffic in addition to the non-stationary factors. The anomaly detection system based on intergration-indicators and Time Window-Comparison Algorithm was produced. The whole system was divided into three parts, data collection, data processing, anomaly detection. Data collection module was responsible for the collection of Netflow data and optimizing database. The second part was to cut Netflow data to retain only the fields which anomaly detection required. The last part includes the extraction of indicators and Time Window Comparision Algorithm two sub-modules.
作者机构：
Hunan City University Department of City Construction Yiyang, China;Hunan University of Technology Department of Packaging and Art Design Zhuzhou, China
摘要：
Oxygen-enhanced combustion is a high efficient burning technology.When it is applied in condensing gas-fired Hot Air Furnace,it is not only reducing the combustion-supporting air,but also greatly increasing the content of vapor in exhausted smoke and heightening the dew point.It is propitious to reclaim vaporization heat in the exhausted smoke.Through academic calculating,when we adopt oxygen-enhanced combustion,the hot air furnace combusts more fully,the volume of the exhausted smoke is reduced greatly and the water vapor quality percentage of the flue gases is increased.When the condensation heat transfer technology is used,the condensation rate of the vapor is increased upwards of 90% and the heat loss of the smoke can be reduced below 2%.At the same time,the condensing boiler does not save energy but also reduce the harmful substance discharged into the atmosphere.That is because of the condensation water dissolving part of the harmful substances in the exhausted flue gas especially in high sulfur content fuel.Through the actual project tests,the sulfides and the dust can be reduced to more than 90%.The environmental protection is very prominent.
期刊：
WIT Transactions on Information and Communication Technologies,2013年46:1161-1168 ISSN：1743-3517
通讯作者：
Jing, Huang
作者机构：
[Jing, Huang] Hunan City Univ, Yiyang, Hunan, Peoples R China.
通讯机构：
[Jing, Huang] H;Hunan City Univ, Yiyang, Hunan, Peoples R China.
会议名称：
International Conference of Information Science and Management Engineering (ISME)
会议时间：
2013
会议地点：
Wuhan, PEOPLES R CHINA
会议主办单位：
[Jing, Huang] Hunan City Univ, Yiyang, Hunan, Peoples R China.
会议论文集名称：
WIT Transactions on Information and Communication Technologies
关键词：
DDoS;ad hoc network;attack
摘要：
In wireless network environment, various types of denial-of-service attacks are possible due to its inherent characteristic limitations such as lack of a centralized authority and easy eavesdropping. An ad hoc network is a collection of wireless mobile nodes that form a temporary network without any centralized administration. Compared to conventional wired and other wireless networks, an ad hoc network is more vulnerable to DDoS attack because all nodes in such network are deployed in an opened, self-organized environment. In order to detect and defense DDoS attack to an ad hoc network, we proposed a complete, active, and effective DDoS detection and defense model.
作者机构：
[Jiang Xue-liang; Yang Hui] Cent South Univ Forestry & Technol, Sch Civil Engn & Mech, Changsha, Hunan, Peoples R China.;[Jiang Xue-liang] HuNan City Univ, Sch Civil Engn, YiYang, Hunan, Peoples R China.;[Fu Jun] Southwest Elect Power Design Inst, Chengdu 610021, Peoples R China.
通讯机构：
[Jiang Xue-liang] C;Cent South Univ Forestry & Technol, Sch Civil Engn & Mech, Changsha, Hunan, Peoples R China.
会议名称：
1st International Conference on Advances in Civil Infrastructure Engineering (ICACIE 2012)
会议时间：
SEP 15-16, 2012
会议地点：
Changsha, PEOPLES R CHINA
会议主办单位：
[Jiang Xue-liang;Yang Hui] Cent South Univ Forestry & Technol, Sch Civil Engn & Mech, Changsha, Hunan, Peoples R China.^[Jiang Xue-liang] HuNan City Univ, Sch Civil Engn, YiYang, Hunan, Peoples R China.^[Fu Jun] Southwest Elect Power Design Inst, Chengdu 610021, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Improved shearing displacement law;Numerical simulation;Parameter back analysis;Pile-soil interaction;Pile-soil slip on interfaces
摘要：
The Soil Improved shearing displacement law is used to analyze Pile-soil interaction and this method can consider stratified foundation, but can’t consider pile-soil slip. An improved shearing displacement law analyzing pile-soil interaction was proposed in this article which could think over pile-soil slip on interfaces and interaction of pile-soil on stratified foundation. Rock and soil’s parameter is very crucial in geological engineering, the soil parameters were determined by parameter back analysis theory and the stress and deformation characteristic for vertical loading piles were analyzed by the improved shearing displaces law. These process was simulated by my own program. The calculation results show that the axial force of pile decreases with pile depth and the pile tip axial force is zero. The pile bottom resistance increases with load and the soil’s resistance increases with the relative displacement between pile and soil. But,the frictional resistance growth rate with displacement is different in different soil. The silt’s growth rate is minimum and the medium-fine sand mixed mucky soil is maximum. The pile frictional resistance increases with load and depth. It has greater directive significance for the pile design.
摘要：
This thesis will do comprehensive analysis on the factors that affect the construction cost in the phases of decision, design, bid, construction and completion and final account. It has pointed out the main problems existing in the cost management of all the phases, and discussed the problems, then brought out the corrective measures.
