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Bao Z.-M.,Beijing Jiaotong University | Liu Y.,Beijing Jiaotong University | Xiong F.,Beijing Jiaotong University | Liu Q.,Power Construction Corporation of China
Journal of Internet Technology | Year: 2016

This paper proposes a new approach to predict the popularity of content in the Chinese microblogging website Sina Weibo. There are four operations in Sina Weibo, including post, repost-only, repost-and-comment, and comment-only. We model these operations as a bipartite graph, which takes the temporal factor into account by assigning edge weight as an exponential decay function. We then propose a regularization framework on this model to predict the original post's future popularity. Experimental results show that our method outperforms other methods in predicting the post's future popularity, especially for shortterm prediction.


Li C.,Beijing Jiaotong University | Zhang Z.,Beijing Jiaotong University | Xiong F.,Beijing Jiaotong University | Liu Q.,Power Construction Corporation of China
Journal of Internet Technology | Year: 2017

A wearable body network (WBN) can extract useful information from the human body. Meanwhile, it has little impact on human movement, although the energy is limited to a single wearable sensor. Then, an efficiency route protocol, which can save the energy-consumption available for WBN is important. On the other hand, the body sensors are movable with human movement. Then, a stable dynamic route protocol is more suitable for WBN. In this paper, a stable dynamic forward-connected route protocol (SDFR protocol) for WBN is proposed, which is a completely selforganized, energy-effcient, and dynamic network. In SDFR protocol, the energy consumption, network stability, and sensor-forward-connected range are considered. Compared with the random method, the SDFR protocol can save the energy and keep the network stable with theoretical and experimental simulations.


Feng F.,China Institute of Water Resources and Hydropower Research | Zhang G.,China Institute of Water Resources and Hydropower Research | Guan J.,North University of China | Zhang C.,Power Construction Corporation of China | Wang W.,North University of China
Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering | Year: 2016

Based on the analysis of particular surface crack found in upstream water stop area of super-high arch dams during construction, grouting grove and pipeline between two upstream copper water stops, and that between copper water stop and grout stop, were proposed to be cancelled, that is to optimize the grouting layout design. Under the guidance of this optimized design, impact on working performance of non-grouted transverse joints in upstream water stop area of super-high arch dam, was studied with the help of the software of multi-field simulation and nonlinear analysis of complex structures. The results show: Significant effect is shown on the local stress at both sides of upstream transverse joints, however, it has little effect on the deformation and stress state of whole structure, verifying the rationality and feasibility of this construction recommendation. © 2016, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.


Liu Y.,Beijing Jiaotong University | Diao S.-M.,Beijing Jiaotong University | Diao S.-M.,Applied Technology Internet | Diao S.-M.,China Life E commerce Company Ltd | And 3 more authors.
Physica A: Statistical Mechanics and its Applications | Year: 2016

In online social media, opinion divergences and differentiations generally exist as a result of individuals’ extensive participation and personalization. In this paper, a Susceptible–Hesitated–Infected–Removed (SHIR) model is proposed to study the dynamics of competitive dual information diffusion. The proposed model extends the classical SIR model by adding hesitators as a neutralized state of dual information competition. It is both hesitators and stable spreaders that facilitate information dissemination. Researching on the impacts of diffusion parameters, it is found that the final density of stiflers increases monotonically as infection rate increases and removal rate decreases. And the advantage information with larger stable transition rate takes control of whole influence of dual information. The density of disadvantage information spreaders slightly grows with the increase of its stable transition rate, while whole spreaders of dual information and the relaxation time remain almost unchanged. Moreover, simulations imply that the final result of competition is closely related to the ratio of stable transition rates of dual information. If the stable transition rates of dual information are nearly the same, a slightly reduction of the smaller one brings out a significant disadvantage in its propagation coverage. Additionally, the relationship of the ratio of final stiflers versus the ratio of stable transition rates presents power characteristic. © 2016 Elsevier B.V.


Transmission lines are sets of electric power transmission line that carry electric power from generating plants to the substations that deliver power to customers. The transmission line mainly covers power cables, tower, and other components. Scope of the Report:  This report focuses on the Transmission Line in Global market, especially in North America, Europe and Asia-Pacific, South America, Middle East and Africa. This report categorizes the market based on manufacturers, regions, type and application. Market Segment by Manufacturers, this report covers  Nexans  General Cable  Shandong Electrical Engcneering & Eguipment  Prysmian  Fengfan Power  KEC  Qingdao Hanhe  SEI  DAJI Towers  LS Cable  Hangzhou Cable  Southwire  Furukawa Electric  Weifang Chang’an  Qingdao East Steel Tower  Jyoti Structures  Lishu Steel Tower  Power Construction Corporation of China  EMC Limited  Wuxiao Group  Xignux  Walsin Lihwa  Weifang Chang’an Fittings Tower Market Segment by Regions, regional analysis covers  North America (USA, Canada and Mexico)  Europe (Germany, France, UK, Russia and Italy)  Asia-Pacific (China, Japan, Korea, India and Southeast Asia)  South America, Middle East and Africa Market Segment by Applications, can be divided into  Application 1  Application 2  Application 3 Global Transmission Line Market by Manufacturers, Regions, Type and Application, Forecast to 2021 1 Market Overview  1.1 Transmission Line Introduction  1.2 Market Analysis by Type  1.2.1 Power Tower  1.2.2 Transmission Conductor & Cable  1.2.3 Others  1.3 Market Analysis by Applications  1.3.1 Application 1  1.3.2 Application 2  1.3.3 Application 3  1.4 Market Analysis by Regions  1.4.1 North America (USA, Canada and Mexico)  1.4.1.1 USA  1.4.1.2 Canada  1.4.1.3 Mexico  1.4.2 Europe (Germany, France, UK, Russia and Italy)  1.4.2.1 Germany  1.4.2.2 France  1.4.2.3 UK  1.4.2.4 Russia  1.4.2.5 Italy  1.4.3 Asia-Pacific (China, Japan, Korea, India and Southeast Asia)  1.4.3.1 China  1.4.3.2 Japan  1.4.3.3 Korea  1.4.3.4 India  1.4.3.5 Southeast Asia  1.4.4 South America, Middle East and Africa  1.4.4.1 Brazil  1.4.4.2 Egypt  1.4.4.3 Saudi Arabia  1.4.4.4 South Africa  1.4.4.5 Nigeria  1.5 Market Dynamics  1.5.1 Market Opportunities  1.5.2 Market Risk  1.5.3 Market Driving Force 2 Manufacturers Profiles  2.1 Nexans  2.1.1 Business Overview  2.1.2 Transmission Line Type and Applications  2.1.2.1 Type 1  2.1.2.2 Type 2  2.1.3 Nexans Transmission Line Sales, Price, Revenue, Gross Margin and Market Share  2.2 General Cable  2.2.1 Business Overview  2.2.2 Transmission Line Type and Applications  2.2.2.1 Type 1  2.2.2.2 Type 2  2.2.3 General Cable Transmission Line Sales, Price, Revenue, Gross Margin and Market Share  2.3 Shandong Electrical Engcneering & Eguipment  2.3.1 Business Overview  2.3.2 Transmission Line Type and Applications  2.3.2.1 Type 1  2.3.2.2 Type 2  2.3.3 Shandong Electrical Engcneering & Eguipment Transmission Line Sales, Price, Revenue, Gross Margin and Market Share  2.4 Prysmian  2.4.1 Business Overview  2.4.2 Transmission Line Type and Applications  2.4.2.1 Type 1  2.4.2.2 Type 2  2.4.3 Prysmian Transmission Line Sales, Price, Revenue, Gross Margin and Market Share  2.5 Fengfan Power  2.5.1 Business Overview  2.5.2 Transmission Line Type and Applications  2.5.2.1 Type 1  2.5.2.2 Type 2  2.5.3 Fengfan Power Transmission Line Sales, Price, Revenue, Gross Margin and Market Share  2.6 KEC  2.6.1 Business Overview  2.6.2 Transmission Line Type and Applications  2.6.2.1 Type 1  2.6.2.2 Type 2  2.6.3 KEC Transmission Line Sales, Price, Revenue, Gross Margin and Market Share  2.7 Qingdao Hanhe  2.7.1 Business Overview  2.7.2 Transmission Line Type and Applications  2.7.2.1 Type 1  2.7.2.2 Type 2 3 Global Transmission Line Market Competition, by Manufacturer  3.1 Global Transmission Line Sales and Market Share by Manufacturer  3.2 Global Transmission Line Revenue and Market Share by Manufacturer  3.3 Market Concentration Rate  3.3.1 Top 3 Transmission Line Manufacturer Market Share  3.3.2 Top 6 Transmission Line Manufacturer Market Share  3.4 Market Competition Trend 4 Global Transmission Line Market Analysis by Regions  4.1 Global Transmission Line Sales, Revenue and Market Share by Regions  4.1.1 Global Transmission Line Sales by Regions (2011-2016)  4.1.2 Global Transmission Line Revenue by Regions (2011-2016)  4.2 North America Transmission Line Sales and Growth (2011-2016)  4.3 Europe Transmission Line Sales and Growth (2011-2016)  4.4 Asia-Pacific Transmission Line Sales and Growth (2011-2016)  4.5 South America Transmission Line Sales and Growth (2011-2016)  4.6 Middle East and Africa Transmission Line Sales and Growth (2011-2016) 5 North America Transmission Line by Countries  5.1 North America Transmission Line Sales, Revenue and Market Share by Countries  5.1.1 North America Transmission Line Sales by Countries (2011-2016)  5.1.2 North America Transmission Line Revenue by Countries (2011-2016)  5.2 USA Transmission Line Sales and Growth (2011-2016)  5.3 Canada Transmission Line Sales and Growth (2011-2016)  5.4 Mexico Transmission Line Sales and Growth (2011-2016) 6 Europe Transmission Line by Countries  6.1 Europe Transmission Line Sales, Revenue and Market Share by Countries  6.1.1 Europe Transmission Line Sales by Countries (2011-2016)  6.1.2 Europe Transmission Line Revenue by Countries (2011-2016)  6.2 Germany Transmission Line Sales and Growth (2011-2016)  6.3 UK Transmission Line Sales and Growth (2011-2016)  6.4 France Transmission Line Sales and Growth (2011-2016)  6.5 Russia Transmission Line Sales and Growth (2011-2016)  6.6 Italy Transmission Line Sales and Growth (2011-2016)


Li S.Y.,Water Resources University | Zhou X.B.,Water Resources University | Wang Y.J.,China Institute of Water Resources and Hydropower Research | Zhou J.P.,Power Construction Corporation of China | And 2 more authors.
Science China Technological Sciences | Year: 2015

This paper discusses the methods of establishing risk criteria for dams and reviews the application of dam risk criteria for individuals and societies in different countries or districts. Given the conditions in China and considering the public safety and acceptance of dam risk, historical dam break data and current design standards, individual and societal risk criteria for dams are proposed. The tolerable dam risk criteria for individuals should be set to 10−5–10−7 per annum based on project scale, for example, approximately 1.0×10−7 per annum, which corresponds to a reliability index of 4.2 based on a 100-year lifespan for a first-class or large project. The societal limit for risk tolerance for dams should be set to approximately 10−3–10−5 per annum, corresponding to the fatality range from 1 to 100 and be horizontally extended to 1000, and F-N curves are proposed. It was also found that the reliability indices of Chinese Standard (GB 50199-2013) and Eurocode1 (2002) are different, but they have the same level of safety measured by the annual probability of failure. The research results have significance for establishing dam risk criteria. © 2015, Science China Press and Springer-Verlag Berlin Heidelberg.


Zhang C.,Power Construction Corporation of China | Hu Z.,Wuhan University
Shuikexue Jinzhan/Advances in Water Science | Year: 2014

In this paper, a mathematical model is designed to estimate the water containment risk for high rock-fill dams during interim seasonal flooding based on the condition that the water must not flow over the top of the dam, and other stochastic factors such as the level of the floodwater in front of the dam and the high water level during flooding. The characteristics of rock-fill dam construction systems, the number of days each month when the dam is under maintenance, and the stochasticity of the average speed of the increase in water level per day are considered for designing a model to calculate the simulated height for flood prevention during interim flooding. Based on the Monte Carlo method, the created risk model is solved by linking stochastic elements from hydrology, hydropower, and construction. Further, the influence of the controllable construction indicator, which is the minimum average daily rising speed, on the risk rate is researched. The feasibility and effectiveness of the risk model and the calculation method are demonstrated through the analysis of Changheba hydropower station in the Dadu River basin in Sichuan, China. ©, 2014, China Water Power Press. All right reserved.


Zhou J.,Power Construction Corporation of China | Wang H.,China Institute of Water Resources and Hydropower Research | Chen Z.,China Institute of Water Resources and Hydropower Research | Zhou X.,China Institute of Water Resources and Hydropower Research | And 3 more authors.
Shuili Xuebao/Journal of Hydraulic Engineering | Year: 2015

The rapid development of China's hydropower projects has resulted in a number of large dams whose heights exceed 200 m, an applicability limit of various design codes. Another concern comes from the cascade hydropower devolvement on a river, in which break of one dam may cause serious downstream secondary disasterds. Based on a comprehensive review on the social and professional safety control standards the authors propose in these paper two extra classes as well as their related design criteria to the existing Chinese dam classification systems. Class E2 refers to a dam with a height ranged between 200-250 m, or a dam whose breaching would cause a secondary break of a downstream Class 1 dam if early warning is not available. The allowableannual probability of failure, reliability index and slope safety factor are specified as 5×10-8, 4.45, and 1.6 respectively. Class E2 refers to a dam with a height ranged between 250-300 m, or a dam whose breaching would cause a secondary break of a downstream Class 1 dam even with early warning. The allowable annual probability of failure, reliability index and slope safety factor are specified as 10-8, 4.7, and 1.7 respectively. An in-depth study on risks and standards associated with these dams has been provided to assess the applicability of the proposed criteria which can be useful for the work of code revision. ©, 2015, China Water Power Press. All right reserved.


Luo Y.,Hubei Engineering University | Luo Y.,Wuhan University of Technology | Li X.-P.,Hubei Engineering University | Li X.-P.,Wuhan University of Technology | And 7 more authors.
Yantu Lixue/Rock and Soil Mechanics | Year: 2014

The damage area is much larger than the blasting excavation area, so rock mass would be damaged several times and result in accumulative damage. The left bank diversion tunnel at Wudongde hydropower station is monitored and simulated for blasting vibration and rock mass deformation during excavation. Based on accumulative damage theory, the damage threshold and damage variable are adopted to consider the parameter weakening in different damage areas. The weakened rock mass parameter is adopted in each damaged element, and numerical simulations are conducted to simulate the accumulative damage induced by blasting excavation. By comparing monitored data and calculation results, the results considering accumulative damage is more close to the monitored values of both blasting vibration and rock mass deformation. Therefore, in numerical simulations of blasting excavation of tunnels, accumulative damage effect should be considered. ©, 2014, Academia Sinica. All right reserved.


Li B.,China Communications Construction Company Ltd. | Li B.,Japanese Ministry of Internal Affairs and Communications Japan | Li B.,Key Laboratory of Port Geotechnical Engineering of Tianjin | Liu J.,Power Construction Corporation of China
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2016

The deep overburden layer under embankment dam foundation is high of permeability. It has seepage stability problems, such as huge leakage, piping and soil flow, and prevention measures should be taken. For a high embankment dam on deep overburden layer, seepage properties are regarded as the main indices to design the quantity, thickness and layout pattern of diaphragm wall, and the finite element method (FEM) and seepage analysis software are used to compare the design schemes and to select the optimum design scheme. The mixed concrete cutoff wall is select as the impermeable body, and an auxiliary cutoff wall is located upstream of the main one. The two cutoff walls are 1.4 m and 1.2 m in thicknesses, and the spacing between them is 14 m. The design scheme of the auxiliary diaphragm wall on the upstream of the main diaphragm wall meets the requirements of the seepage control of embankment dams. © 2016, Chinese Society of Civil Engineering. All right reserved.

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