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A discussion about the limitations of the Eurocode’s high-speed load model for railway bridges

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railway Engineering Science 2024年第2期32卷 211-228页

作者： Gonçalo Ferreira Pedro Montenegro Josérui Pinto António Abel Henriques rui calçada CONSTrUCT-LESE Faculty of EngineeringUniversity of PortoRua Dr.Roberto Frias4200-465 PortoPortugal CONSTrUCT-LABEST Faculty of EngineeringUniversity of PortoRua Dr.Roberto Frias4200-465 PortoPortugal

High-speed railway bridges are subjected to normative limitations concerning maximum permissible deck *** the design of these structures,the European norm EN 1991-2 introduces the high-speed load model(HSLM)—a set of point loads intended to include the effects of existing high-speed ***,the evolution of current trains and the recent development of new load models motivate a discussion regarding the limits of validity of the *** this study,a large number of randomly generated load models of articulated,conventional,and regular trains are tested and compared with the envelope of HSLM *** each type of train,two sets of 100,000 load models are considered:one abiding by the limits of the EN 1991-2 and another considering wider *** comparison is achieved using both a bridge-independent metric(train signatures)and dynamic analyses on a case study bridge(the Canelas bridge of the Portuguese railway Network).For the latter,a methodology to decrease the computational cost of moving loads analysis is *** show that some theoretical load models constructed within the stipulated limits of the norm can lead to effects not covered by the *** is especially noted in conventional trains,where there is a relation with larger distances between centres of adjacent vehicle bogies.

关键词： High-speed load model Dynamic analysis High-speed railways Train signature railway bridges Deck acceleration

Leading Chinese Companies to Seek Opportunities in Overseas Markets

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China's Foreign Trade 2024年第2期 8-12页

作者： ada Wang 不详

On April 14,a flight from China landed at ingsford Smith Airport in Sydney,marking the beginning of the journey for Chinese companies entering the Australian and New Zealand ***"Thousands of Entrepreneur Delegations Going Overseas"activity is an important measure taken by China Council for the Promotion of International Trade(CCPIT) to help companies develop in foreign markets and promote practical cooperation between Chinese and foreign *** the beginning of the year.

关键词： companies Sydney Trade

Chinese Enterprises’ Investment in Southeast Asia Continues Unabated

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China's Foreign Trade 2024年第1期 45-46页

作者： ada Wang 不详

As we all know,Southeast Asia has become a hot destination for Chinese enterprises to invest *** latest report shows that Southeast Asia continues to attract China’s capital,within which the medical industry has become an important area for Chinese enterprises to invest in,and the investment activity has gradually warmed up despite fluctuations.

关键词： enterprises investment Southeast

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Australian Wine is Coming Back to the Chinese Table

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China's Foreign Trade 2024年第2期 49-50页

作者： ada Wang 不详

China's Ministry of Commerce announced the termination of anti-dumping and countervailing duties on imports of wine originating in Australia from March *** means that Australian wine is finally returning to the Chinese market after three years of *** the past three years,the market has changed rapidly and China's local wine sector has also *** changes can we expect the return of Australian wine to bring to the market?

关键词： imports return Australian

区块链技术采纳成本分摊机制与供应链协调研究

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系统工程理论与实践 2024年第2期44卷 579-594页

作者：车阿大李芯怡郑本荣西北工业大学管理学院西安710129 华中农业大学经济管理学院武汉430070

互联网的快速发展促进区块链技术在供应链中的广泛应用.区块链技术采纳一方面需要支付高昂的成本,另一方面对供应链运作决策与绩效产生重要影响.本文基于供应链成员合作投入区块链技术的背景,分别考虑比例分摊与Bargaining分摊两类成本... 详细信息

互联网的快速发展促进区块链技术在供应链中的广泛应用.区块链技术采纳一方面需要支付高昂的成本,另一方面对供应链运作决策与绩效产生重要影响.本文基于供应链成员合作投入区块链技术的背景,分别考虑比例分摊与Bargaining分摊两类成本分摊机制,通过建立不同分摊机制下制造商与零售商之间的动态博弈模型,分析了区块链技术采纳成本分摊对供应链均衡决策与利润、消费者剩余和社会福利的影响.研究发现,与无分摊情形相比较,成本分摊可改进制造商与供应链系统收益,并能提高消费者剩余和社会福利;Bargaining分摊机制尽管可实现系统效率最优,但该分摊机制下零售商的利润却低于无分摊情形下的保留利润.此外,运用了收益共享契约,实现了基于区块链的供应链系统的协调.研究结论为企业区块链技术采纳决策、提高区块链技术合作和供应链运作效率提供一定的参考.

关键词：区块链技术采纳比例分摊 Bargaining分摊供应链协调

Prostate health index can stratify patients with Prostate Imaging reporting and Data System score 3 lesions on magnetic resonance imaging to reduce prostate biopsies

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Asian Journal of Andrology 2024年第1期26卷 20-24页

作者： John Shung-Lai Leung Wai-Kit Ma Brian Sze-Ho Ho Stacia Tsun-Tsun Chun rong Na Yongle Zhan Chi-Yuen Ng Chi-Ho Ip ada Tsui-Lin Ng Yiu-Chung Lam Division of Urology Department of SurgeryQueen Mary HospitalUniversity of Hong KongHong KongChina Division of Urology Department of SurgeryPrincess Margaret HospitalHongKongChina

We aim to evaluate prostate health index as an additional risk-stratification tool in patients with Prostate Imaging reporting and Data System score 3 lesions on multiparametric magnetic resonance *** with biochemical or clinical suspicion of having prostate cancer who underwent multiparametric magnetic resonance imaging in two tertiary centers(Queen Mary Hospital and Princess Margaret Hospital,Hong Kong,China)between January 2017 and June 2022 were ***-magnetic resonance imaging fusion biopsies were performed after prostate health index *** who only had Prostate Imaging reporting and Data System score 3 lesions were further stratified into four prostate health index risk groups and the cancer detection rates were *** of the 747 patients,47.3%had Prostate Imaging reporting and Data System score 3 lesions *** detection rate of clinically significant prostate cancer in this group was 15.0%.The cancer detection rates of clinically significant prostate cancer had statistically significant differences:5.3%in prostate health indexrostate health index 25.0-34.9,17.9%in prostate health index 35.0-54.9,and 52.6%in prostate health index≥55.0(Prostate health indexrisk of missing clinically significant prostate *** health index could be used as an additional risk stratification tool for patients with Prostate Imaging reporting and Data System score 3 *** could be avoided in patients with low prostate health index,with a small risk of missing clinically significant prostate cancer.

关键词： biopsy fusion biopsy magnetic resonance imaging prostate cancer prostate health index

China-Africa Economic and Trade Cooperation is Full of Vitality

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China's Foreign Trade 2024年第4期 8-16页

作者： ada Wang 不详

China is the largest developing country,and Africa is the continent with the highest concentration of developing *** histor.cal experiences and common histor.cal missions have long linked China and Africa so *** September 4 to 6,the 2024 Forum on China-Africa Cooperation(FOCAC)Summit will be held in *** theme this year is“Joining Hands to Promote Modernization and Build a High-Level China-Africa Community with a Shared Future”.Leaders of FOCAC’s African members will be invited to attend,and representatives from relevant African regional organizations and international organizations will participate in the related activities.

关键词： Africa African histor.cal

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ada Marino 无形之韧

摄影之友 2024年第9期 58-65页

作者： ada Marino(图) 不详

艾达·马里诺面对令人窒息的传统父权制家庭,通过作品筑起了一座灯塔,用女性的韧性为那些深受压迫的群体编织了一轮新月。继《一家之父》(Paterfamilias)之后,意大利摄影师艾达·马里诺(ada Marino)再度把目光聚焦于女性领域,创作了超... 详细信息

艾达·马里诺面对令人窒息的传统父权制家庭,通过作品筑起了一座灯塔,用女性的韧性为那些深受压迫的群体编织了一轮新月。继《一家之父》(Paterfamilias)之后,意大利摄影师艾达·马里诺(ada Marino)再度把目光聚焦于女性领域,创作了超现实主义的作品《新月》(New Moons)。

关键词：马里诺《新月》父权制家庭超现实主义艾达 ada 摄影师

"Building the Best Platform for Capacity Cooperation Between China and Malaysia"

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China's Foreign Trade 2024年第3期 45-46页

作者： ada Wang 不详

Kuantan,the capital of Pahang State on the east coast of Malaysia,is a quiet town,where the Kuantan river winds and flows into the *** Malaysia-China Kuantan Industry Park,a major project of the Belt and road Initiative and a demonstration base for cross-border international capacity cooperation,is located *** the official opening of the park in 2013,it has created an innovative model of economic cooperation between the two *** 2023,on the 10th Anniversary of the Kuantan Industrial Park,a new development plan was launched again-the 3rd plot of the Malaysia-China Kuantan Industry Park,known as Malaysia-China Kuantan International Logistics Park,was officially started.

关键词： Malaysia official cooperation