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Infl uence of structural parameters on dynamic characteristics and wind-induced buffeting responses of a super-long-span cable-stayed bridge 被引量:7
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作者 Wang Hao Chen Chunchao +1 位作者 Xing Chenxi Li Aiqun 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2014年第3期389-399,共11页
A 3D finite element (FE) model for the Sutong cable-stayed bridge (SCB) is established based on ANSYS. The dynamic characteristics of the bridge are analyzed using a subspace iteration method. Based on recorded wi... A 3D finite element (FE) model for the Sutong cable-stayed bridge (SCB) is established based on ANSYS. The dynamic characteristics of the bridge are analyzed using a subspace iteration method. Based on recorded wind data, the measured spectra expression is presented using the nonlinear least-squares regression method. Turbulent winds at the bridge site are simulated based on the spectral representation method and the FFT technique. The influence of some key structural parameters and measures on the dynamic characteristics of the bridge are investigated. These parameters include dead load intensity, as well as vertical, lateral and torsional stiffness of the steel box girder. In addition, the influence of elastic stiffness of the connection device employed between the towers and the girder on the vibration mode of the steel box girder is investigated. The analysis shows that all of the vertical, lateral and torsional buffeting displacement responses reduce gradually as the dead load intensity increases. The dynamic characteristics and the structural buffeting displacement response of the SCB are only slightly affected by the vertical and torsional stiffness of the steel box girder, and the lateral and torsional buffeting displacement responses reduce gradually as the lateral stiffness increases. These results provide a reference for dynamic analysis and design of super-long-span cable-stayed bridges. 展开更多
关键词 cable-stayed bridge dynamic characteristics finite element (FE) method wind field simulation buffetingresponse parameter effects elastic connection device
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New characteristics of intensity assessment of Sichuan Lushan “4.20” M_s7.0 earthquake 被引量:4
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作者 Sun Baitao Yan Peilei Chen Xiangzhao 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2014年第S1期123-139,共17页
The post-earthquake rapid accurate assessment of macro influence of seismic ground motion is of significance for earthquake emergency relief,post-earthquake reconstruction and scientific research. The seismic intensit... The post-earthquake rapid accurate assessment of macro influence of seismic ground motion is of significance for earthquake emergency relief,post-earthquake reconstruction and scientific research. The seismic intensity distribution map released by the Lushan earthquake field team of the China Earthquake Administration(CEA) five days after the strong earthquake(M7.0) occurred in Lushan County of Sichuan Ya’an City at 8:02 on April 20,2013 provides a scientific basis for emergency relief,economic loss assessment and post-earthquake reconstruction. In this paper,the means for blind estimation of macroscopic intensity,field estimation of macro intensity,and review of intensity,as well as corresponding problems are discussed in detail,and the intensity distribution characteristics of the Lushan '4.20' M7.0 earthquake and its influential factors are analyzed,providing a reference for future seismic intensity assessments. 展开更多
关键词 Lushan earthquake intensity assessment damage index remote sensing strong earthquake record
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Effect of Yaobitong capsule on histomorphology of dorsal root ganglion and on expression of p38mark phosphorylation in autologous nucleus pulposus transplantation model of rats 被引量:3
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作者 Jian Xin Feng-Shuang Jia Zhan-Wang Xu 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2015年第10期840-843,共4页
Objective:To discuss the effect of Yaobitong capsule on histomorphology of dorsal root ganglion and on expression of p38 MARK phosphorylation in autologous nucleus pulposus transplantation model of rats.Methods:A tota... Objective:To discuss the effect of Yaobitong capsule on histomorphology of dorsal root ganglion and on expression of p38 MARK phosphorylation in autologous nucleus pulposus transplantation model of rats.Methods:A total of 60 SD rats were randomly divided into the blank group,model group and Yaobitong capsule group,with 20 rats in each group.The animal model of autologous nucleus pulposus transplantation around the lumbar nerve root was built.Three days after the modeling,rats were given the drugs for the first time,while rats in the model group were given the equivalent normal saline.After 30 d of continuous administration,samples were collected from rats.HE staining was performed on the dorsal root ganglion of L4 and L5 spinal cord of rats in each group and the expression of p38 MARK phosphorylation was measured.All data were treated with the statistical analysis.Results:The histological examination showed that the histomorphology of dorsal root ganglion in the Yaobitong capsule group was more significantly improved than the one in the model group,while the results of western blot showed that Yaobitong capsule could significandy inhibit the level of p38 MAPK phosphorylation of dorsal root ganglion cells.Conclusions:Yaobitong capsule can improve the symptoms and nerve radiculopathy of autologous nucleus pulposus transplantation of rats and its mechanism may be associated with its inhibiting effect on the level of p38 MAPK phosphorylation. 展开更多
关键词 Yaobitong CAPSULE AUTOLOGOUS NUCLEUS pulposus Dors
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Simplified seismic performance assessment and implications for seismic design 被引量:3
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作者 Timothy J.Sullivan David P.Welch Gian Michele Calvi 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2014年第S1期95-122,共28页
The last decade or so has seen the development of refined performance-based earthquake engineering(PBEE) approaches that now provide a framework for estimation of a range of important decision variables,such as repair... The last decade or so has seen the development of refined performance-based earthquake engineering(PBEE) approaches that now provide a framework for estimation of a range of important decision variables,such as repair costs,repair time and number of casualties. This paper reviews current tools for PBEE,including the PACT software,and examines the possibility of extending the innovative displacement-based assessment approach as a simplified structural analysis option for performance assessment. Details of the displacement-based s+eismic assessment method are reviewed and a simple means of quickly assessing multiple hazard levels is proposed. Furthermore,proposals for a simple definition of collapse fragility and relations between equivalent single-degree-of-freedom characteristics and multi-degree-of-freedom story drift and floor acceleration demands are discussed,highlighting needs for future research. To illustrate the potential of the methodology,performance measures obtained from the simplified method are compared with those computed using the results of incremental dynamic analyses within the PEER performance-based earthquake engineering framework,applied to a benchmark building. The comparison illustrates that the simplified method could be a very effective conceptual seismic design tool. The advantages and disadvantages of the simplified approach are discussed and potential implications of advanced seismic performance assessments for conceptual seismic design are highlighted through examination of different case study scenarios including different structural configurations. 展开更多
关键词 performance-based earthquake engineering displacement-based assessment seismic assessment
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Re-Evaluation of China's Service Trade Competitiveness: A Global Value Chain Perspective 被引量:2
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作者 Cheng Dazhong Zheng Lekai Wei Ruqing 《China Economist》 2018年第3期14-25,共12页
Based on the Worm Input-Output Database (WIOD), this paper conducts a forward-linkage decomposition of value-added in trade to estimate China's service value-added exports and its service sector's international co... Based on the Worm Input-Output Database (WIOD), this paper conducts a forward-linkage decomposition of value-added in trade to estimate China's service value-added exports and its service sector's international competitiveness during 2000- 2014. Result indicates that during the sample period, China's service exports measured by forward-linkage decomposition method accounted for around 35% in its total export. While the value of services exported directly through the service sector accounted for a falling share, the value of services exported through other sectors represented an increasing share. China ranks second in the world in terms of market share of service exports. However, the revealed comparative advantage (RCA) of China's service exports and export sophistication remains limited. 展开更多
关键词 global value chain service sector competitiveness of service trade trade in value-added(TiVA)
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The International Monetary System and the Global Financial Crisis 被引量:1
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作者 Qiang Jianxin 《Contemporary International Relations》 2010年第5期110-118,共9页
The international monetary system has experienced three main phases: the gold standard, the Bretton Woods system and the Jamaica arrangement or de facto U.S. dollar standard. The current global
关键词 金融危机 货币 国际 牙买加 布雷顿 冲击波 美国 美元
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Elimination of extraordinarily high cracking susceptibility of aluminum alloy fabricated by laser powder bed fusion 被引量:1
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作者 Holden Hyer Le Zhou +5 位作者 Sharon Park Thinh Huynh Abhishek Mehta Saket Thapliyal Rajiv S.Mishra Yongho Sohn 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2022年第8期50-58,共9页
Using the calculation of phase diagrams approach and Scheil solidification modeling,the Al-2.5Mg-1.0Ni-0.4Sc-0.1Zr alloy was designed,intentionally with an extraordinarily high cracking susceptibility,making it prime ... Using the calculation of phase diagrams approach and Scheil solidification modeling,the Al-2.5Mg-1.0Ni-0.4Sc-0.1Zr alloy was designed,intentionally with an extraordinarily high cracking susceptibility,making it prime for solidification cracking during laser powder bed fusion.This study demonstrates the ability to mitigate even the most extreme solidification cracking tendencies in aluminum alloys with only minor alloying additions of Sc and Zr,0.5 wt.%max.Furthermore,by employing a simple direct ageing heat treatment,good tensile mechanical properties were observed with a yield strength of 308 MPa,an ultimate tensile strength of 390 MPa,and a total elongation of 11%. 展开更多
关键词 Additive manufacturing Cracking susceptibility Aluminum alloy CALPHAD Mechanical properties
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An Analysis of U.S. Involvement in the South China Sea Dispute 被引量:1
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作者 Lu Fanghua 《Contemporary International Relations》 2010年第6期132-141,共10页
The U.S. is the largest country outside of the region to involve itself in the South China Sea dispute. U.S. policy on this issue is guided by the principle of containing China's rise and this will continue to be ... The U.S. is the largest country outside of the region to involve itself in the South China Sea dispute. U.S. policy on this issue is guided by the principle of containing China's rise and this will continue to be the case in the near future. Meanwhile, the U.S. has proposed a new multi-lateral security mechanism, incorporating itself, in the South China Sea. This article will put forward some reflections and suggestions on the above issues. 展开更多
关键词 中国东海 美国 作者 安全机制 南中国海
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Questioning Complacency:Climate Change Impacts,Vulnerability,and Adaptation in Norway 被引量:5
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作者 Karen O'Brien Siri Eriksen +1 位作者 Linda Sygna Lars Otto Naess 《AMBIO-人类环境杂志》 2006年第2期50-55,4,共6页
对欧洲气候变化影响的估计大多数都是在产业或生态系统的水平上进行的,对于气候变化对社会究竟意味着什么没有充分的理解。而且主要的焦点在于技术适应性,而对气候变化适应性的过程没有太多关注。在本研究中,我们对最近在挪威进行的... 对欧洲气候变化影响的估计大多数都是在产业或生态系统的水平上进行的,对于气候变化对社会究竟意味着什么没有充分的理解。而且主要的焦点在于技术适应性,而对气候变化适应性的过程没有太多关注。在本研究中,我们对最近在挪威进行的一项关于气候变化影响、脆弱性和适应性的调查的发现进行了介绍和分析,目的在于认识气候变化的更广泛社会影响。主要分为三个部分:首先,潜在的极限和间接影响可能比直接的,产业性的影响更重要。其次,高度敏感的产业、区域和社区与不同水平的社会脆弱性相结合就会同时产生得者和失者。再次,国家适应能力的高水平掩盖了适应性的障碍和限制,特别是对于那些对气候变化最脆弱的群体。基于这些结果,我们对挪威和其它欧洲国家对气候变化影响和适应性的自满情绪表示质疑。我们认为应当提高对气候变化影响的社会背景及其脆弱性和适应性形成过程的重视。 展开更多
关键词 气候变化影响 技术适应性 弱性 挪威 情绪 社会影响 欧洲国家 生态系统 间接影响 适应能力
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Study of the Sarough Dam Fusegates 被引量:1
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作者 Komeil Samet Mohammad Ashrafi 《Journal of Civil Engineering and Architecture》 2022年第9期469-477,共9页
Dam construction industry has concerned specific attention to engineering economy,over the past years;so in this direction the topic of emergency fusegates has considered as a new technology since 1989,in all over the... Dam construction industry has concerned specific attention to engineering economy,over the past years;so in this direction the topic of emergency fusegates has considered as a new technology since 1989,in all over the world.Fusegate is a simple,safe,and robust structure in increasing live storage or spillway capacity and a mechanical equivalent of a fuse plug.Although the installation of gates with different types and heights might practically be difficult,but its lower annual cost,flexibility in operation and smaller wasted water resulting from gates tipping justifies their selection as a more desirable solution.In this paper,the fusegates of Sarough storage dam(Googerdchi)in West-Azerbaijan province is studied an analyzed.The fusegates are installed for the first time in Iran,on Sarough dam spillway instead of radial gates.By installing these gates,the storage capacity of the reservoir increased up to gates overhead level for about 10 mcm.Flood hydrograph in six different return periods(from 2 to 1000 years)of the dam,shows that dam capacity has increased by equipping with fusegates.In addition,a comparison discharge-time-reservoir level chart between 1st to 6th individual fusegate overthrow periods is done. 展开更多
关键词 Fusegates Sarough Dam spillway capacity FLOOD
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Profile of men's health in Malaysia: problems and :hallenges
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作者 Seng Fah Tong Wah Yun Low Chirk Jenn Ng 《Asian Journal of Andrology》 SCIE CAS CSCD 2011年第4期526-533,共8页
Men's health concerns have evolved from the traditional andrology and male sexual health to a more holistic approach that encompasses male psychological, social and physical health. The poor state of health in men co... Men's health concerns have evolved from the traditional andrology and male sexual health to a more holistic approach that encompasses male psychological, social and physical health. The poor state of health in men compared to their female counterparts is well documented. A review of the epidemiological data from Malaysia noted a similar trend in which men die at higher rates in under 1 and above 15 years old groups and most disease categories compared to women. In Malaysia, the main causes of death in men are non-communicable diseases and injuries. Risk factors, such as risk-taking behaviour, smoking and hypertension, are prevalent and amenable to early interventions. Erectile dysfunction, premature ejaculation and prostate disorders are also prevalent. However, many of these morbidities go unreported and are not diagnosed early; therefore, opportunities for early intervention are missed. This reflects poor health knowledge and inadequate health-care utilisation among Malaysian men. Their health-seeking behaviour has been shown to be strongly influenced by family members and friends. However, more research is needed to identify men's unmet health-care needs and to develop optimal strategies for addressing them. Because the Malaysian population is aging and there is an increase in sedentary lifestyles, optimizing men's health will remain a challenge unless effective measures are implemented. The existing male-unfriendly health-care system and the negative influence of masculinity on men's health behaviour must be addressed. A national men's health policy based on a male-friendly approach to health-care delivery is urgently needed to provide a framework for addressing these challenges. 展开更多
关键词 aging male cause of death EPIDEMIOLOGY health promotion MALAYSIA men's health non-communicable diseases risk factors
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A Study on Leisure Participation of China's Elderly and Its Influence Factors
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作者 Wang Lili 《China Population Today》 2011年第4期40-40,共1页
Leisure activities play an important role in the personal lives of the aged. Using the data of The Sampling Survey of the Aged Population in Urban/ Rural China conducted by China Research Center on Ageing in 2000and 2... Leisure activities play an important role in the personal lives of the aged. Using the data of The Sampling Survey of the Aged Population in Urban/ Rural China conducted by China Research Center on Ageing in 2000and 2006, this article analyzed the features and the influence factors of older people's leisure participation and revealed that most older people engaged in a humdrum activities life; gender, 展开更多
关键词 休闲活动 中国城市 影响因素 老年人 调查数据 生命活动 老龄化
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Assessment of the North Korea Nuclear Six-Party Talks
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作者 Huang Fengzhi Jin Xin 《Contemporary International Relations》 2012年第1期96-104,共9页
The Six-Party Talks (SPT) have helped to maintain peace in Northeast Asia through consensus building and spurring countries to take action. Prospects for the SPT hinge on whether a compromise can be hammered out betwe... The Six-Party Talks (SPT) have helped to maintain peace in Northeast Asia through consensus building and spurring countries to take action. Prospects for the SPT hinge on whether a compromise can be hammered out between the U.S. and North Korea. 展开更多
关键词 朝鲜核问题 六方 评价 安全环境 东北亚 SPT 次区域 华盛顿
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The Effect of Demographic Dividend on Economic owth in China in the Context of Structural Change d Institutional Transition
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作者 Che Shiyi Guo Lin 《China Population Today》 2011年第3期40-40,共1页
The major structural and institutional changes have not been accounted for in the existing empirical studies of impact of demographic dividend on economic growth in China. This paper examines the impacts of demographi... The major structural and institutional changes have not been accounted for in the existing empirical studies of impact of demographic dividend on economic growth in China. This paper examines the impacts of demographic dividend on economic growth by using Error Correction Model and time series data from 1978 to 2008. The model incorporates variables representing structural change and institutional transition. Results show that fixed asset investment has the greatest influence on China's economic growth, followed by technological progress, institutional transition, and structural change. The impact of the demographic dividend is significant, but it has fewer shares to explain economic growth. Thus, in the future, with gradual disappearance of the demographic dividend, China needs to rely more on investment growth, technological progress, structure change and institutional transition. 展开更多
关键词 结构变化 中国经济 口红 零增长 误差修正模型 固定资产投资 经济增长 变迁
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The Path to Globalization——FDI inflows and outflows for China's auto industry
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作者 Yuan Jia 《China's Foreign Trade》 2009年第20期19-21,共3页
1.A Brief introduction to China's auto industry The automotive industry is one of the six key industries in China.It has expanded rapidly over the reform years and typically accounts for a large and increasing sha... 1.A Brief introduction to China's auto industry The automotive industry is one of the six key industries in China.It has expanded rapidly over the reform years and typically accounts for a large and increasing share in industrial production,exports, and job creation. 展开更多
关键词 中国汽车工业 外国直接投资 全球化 外流 道路 汽车产业 重点行业 工业生产
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Strategy of Rebalance to the Asia-Pacific in Obama's New Term and US Ideological Export
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作者 Fang Guangshun Ma Qiang 《China International Studies》 2014年第5期93-111,共19页
Since the beginning of his second term, Barack Obama has made some adjustment to US strategy of rebalance to the Asia-Pacific.The adjustment is aimed at adapting the US to the new features in the post-flnancial crisis... Since the beginning of his second term, Barack Obama has made some adjustment to US strategy of rebalance to the Asia-Pacific.The adjustment is aimed at adapting the US to the new features in the post-flnancial crisis era, the new developments in the Asia- Pacific situation and the new changes in the overall US strategy, and it also serves US strategic intentions to dominate the regional affairs, acquire and safeguard its own interests and counterbalance China and it also serves US strategic intentions to dominate the regional affairs, acquire and safeguard its own interests and counterbalance China and prevent it from playing a leading role in the region. It is worth noting that the adjusted rebalance strategy features the purposefulness of US ideological export. The impact of the changes in the contents and means of ideological export on the situation in the Asia-Pacific region deserves attention. 展开更多
关键词 美国总统 再平衡 出口 术语 意识形态 亚太地区 调整 影响值
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The EU's Foreign Policy Under Debt Crisis
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作者 Xu Longdi Sun Youjin 《China International Studies》 2013年第1期84-103,2-3,共20页
Under the impact of the sovereign debt crisis, the European Union pays less attention to its foreign policy and the Common Foreign Policy tends to be "renationalized"; the EU is again embracing "geo-eco... Under the impact of the sovereign debt crisis, the European Union pays less attention to its foreign policy and the Common Foreign Policy tends to be "renationalized"; the EU is again embracing "geo-economics" with an enhanced tendency of highlighting economic ties and trade in its external relations; EU countries have greatly cut their defence expenditures, making it more difficult to implement the EU’s Common Security and Defence Policy (CSDP) in future. The author holds that the prospects of economic growth in the Eurozone countries, European integration under the pressure of structural changes in international relations, and competition and collaboration in a multiple structure of foreign policy establishments are combined to shape the EU’s foreign policy in the coming years. 展开更多
关键词 外交政策 欧盟 债务 金融危机 可能影响 被动性 一体化 主权
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Multilateralism and Health Security Cooperation in East Asia
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作者 ZhuMingquan Tang Bei 《China International Studies》 2009年第6期152-168,共17页
Since the end of the Cold War,the newly-emergent and recurrent infectious diseases have become a troublesome problem that human society has to deal with.New diseases emerge at an annual rate of one kind per year,while... Since the end of the Cold War,the newly-emergent and recurrent infectious diseases have become a troublesome problem that human society has to deal with.New diseases emerge at an annual rate of one kind per year,while those afflicting 展开更多
关键词 东亚地区 卫生安全 合作 主义 人类社会 年增长率 传染病 结核病
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Geo-religion and China's Foreign Strategies
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作者 Xu Yihua Zou Lei 《China International Studies》 2013年第1期49-65,2,共17页
In contemporary international politics, the "global resurgence of religion" and the "political awakening of religion" have increasingly become trans-regional and trans-national phenomena. At the same time, globali... In contemporary international politics, the "global resurgence of religion" and the "political awakening of religion" have increasingly become trans-regional and trans-national phenomena. At the same time, globalization has increased religion's impact on the international relations and domestic politics of all states. Religion is not only viewed as an "extension of politics in another form" but also as a resource competed for bv state in the international arena. 展开更多
关键词 宗教 国际政治 地理 中国 全球范围 国际关系 全球化
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More Open to the Global World——On the 7th Anniversary of China's Entry into the WTO
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作者 Xu Fan 《China's Foreign Trade》 2009年第1期64-65,共2页
The newly passed 2008 marked the 7th anniversary of China's entry into the WTO.Embracing the change we prepared and ma- tured to the challenge of becoming WTO member,an act which opened numerous opportunities to o... The newly passed 2008 marked the 7th anniversary of China's entry into the WTO.Embracing the change we prepared and ma- tured to the challenge of becoming WTO member,an act which opened numerous opportunities to our country.Looking back on the past seven years,we realise the significant positive changes that had taken place-China's values changed,our eco- 展开更多
关键词 对外贸易 WTO 世界贸易组织 贸易往来 中国
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