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| 1 | Strength and Stability Analysis of Deep Sea Drilling Risers显示文摘In order to analyze the influence of vortex-induced vibration on the strength and stability of marine drilling risers, a simplified analytical model was established and a method for calculating vortex-induced dynamic response was developed. A case study indicated that at primary resonance, first-order dynamic displacement response is greater than higher-order mode responses, but the influence of dynamic moment and shearing force of higher-order modes cannot be ignored. The natural frequency of risers decreased sharply with increasing length of the riser, but increased with increasing top tension. Various factors should be considered to avoid vortex-induced vibration in practical application, and the influence of vortex-induced vibration could be estimated by calculating the fatigue lifetime of riser. | Yang Jin Liu Caihong Liu Hanbin Xie Renjun Cao Shijing | 2007 | Petroleum Science2007，4，2： | 5 |
| 2 | A New Record of Kaloula(Amphibia: Anura: Microhylidae) in Shanghai, China显示文摘We discovered a medium-sized species of narrow-mouthed frog of the genus Kaloula in June and September 2014 during municipal surveys of amphibians in Shanghai. Three narrow-mouthed frogs were collected in city drains of the Binjiang Forest Park, Shanghai. Based on subsequent examination and morphological characters, these specimens were identified as Kaloula borealis(Barbour, 1908). The species was mainly distributed in Northern China and Korea. It is a new amphibian record for Shanghai. We found the visible differences in male secondary sexual characteristics between our specimens and Beijing specimens. K. borealis was first described inhabiting urban greenlands which could benefit amphibian conservation in urban and urbanizing areas. | Wei ZHANG Ben LI Xiaoxiao SHU Hanbin XIE Enle PEI Xiao YUAN Yujie SUN Tianhou WANG Zhenghuan WANG | 2015 | Asian Herpetological Research2015，6，3： | 3 |
| 3 | 中国大鲵隐存种及其灭绝危机显示文摘文章简介由于栖息地破坏及人为过度捕捉,中国大鲵的野生资源锐减。由于缺乏显著的外部性状差异,中国大鲵长期以来被认为是一个物种。不同地方的种群是否存在显著的分化?目前基于'一个物种'的保护策略是否得当. | 颜芳 Jingcai Lü Baolin Zhang Zhiyong Yuan Haipeng Zhao Song Huang Gang Wei Xue Mi Dahu Zou Wei Xu Shu Chen Jie Wang Feng Xie Minyao Wu Hanbin Xiao Zhiqiang Liang Jieqiong Jin Shifang Wu CunShuan Xu Benjamin Tapley Samuel T.Turvey Theodore J.Papenfuss Andrew A.Cunningham Robert W.Murphy 张亚平 车静 | 2019 | 科学新闻2019，0，2： | 1 |
| 4 | Rice yellow stunt virus activates polyamine biosynthesis to promote viral propagation in insect vectors by disrupting ornithine decarboxylase antienzyme function显示文摘Intracellular polyamines(putrescine,spermidine,and spermine)have emerged as important molecules for viral infection;however,how viruses activate polyamines biosynthesis to promote viral infection remains unclear.Ornithine decarboxylase 1(ODC1)and its antienzyme 1(OAZ1)are major regulators of polyamine biosynthesis in animal cells.Here,we report that rice yellow stunt virus(RYSV),a plant rhabdovirus,could activate putrescine biosynthesis in leafhoppers to promote viral propagation by inhibiting OAZ1 expression.We observed that the reduction of putrescine biosynthesis by treatment with difluormethylornithine(DFMO),a specific nontoxic inhibitor of ODC1,or with in vitro synthesized dsRNAs targeting ODC1 mRNA could inhibit viral infection.In contrast,the supplement of putrescine or the increase of putrescine biosynthesis by treatment with ds RNAs targeting OAZ1 mRNA could facilitate viral infection.We further determined that both RYSV matrix protein M and ODC1 directly bind to the ODC-binding domain at the C-terminus of OAZ1.Thus,viral propagation in leafhoppers would decrease the ability of OAZ1 to target and mediate the degradation of ODC1,which finally activates putrescine production to benefit viral propagation.This work reveals that polyamine-metabolizing enzymes are directly exploited by a vector-borne virus to increase polyamine production,thereby facilitating viral infection in insect vectors. | Xiao-Feng Zhang Tianbao Zeng Yunjie Xie Yuemin Zheng Huanqin Wang Hanbin Lin Zongwen Wang Taiyun Wei | 2021 | Science China(Life Sciences)2021，64，9： | 0 |
| 5 | Effects of landscape heterogeneity and breeding habitat diversity on rice frog abundance and body condition in agricultural landscapes of Yangtze River Delta,China显示文摘Amphibia ns play a key role in structuring biological assemblages of agricultural landscapes,but they are threatened by global agricultural intensification.Landscape structure is an important variable in flue ncing biodiversity in agricultural la ndscapes.However,in the Yangtze River Delta,where a'farmland-orchard-fishpond'agricultural pattern is common,the effects of landscape construction on anuran populations are unclear.In this study,we examined the effects of agricultural landscape parameters on the abundance and body condition of the rice frog(Fejervarya multistriata),which is a dominant anuran species in farmland in China.Employing a visual encounter method,we surveyed rice frog abundance for 3years across 20 agricultural landscapes.We also calculated the body condition index(BCD of 188 male frog individuals from these agricultural landscapes.Landscape variables,comprising landscape compositional heterogeneity(using the Shannon diversity in dex of all land cover types except buildings and roads),Ian dscape con figurational heterogeneity(using landscape edge density),breeding habitat diversity(using the number of 5 waterbody types available as breeding habitats),and areas of forest were also measured for each 1-km radius landscape.We found that the amount of forest in each agricultural Iandscape had a sign讦icant positive relationship with rice frog abundance,and breeding habitat diversity was positively related to the BCI of male rice frogs.However,body condition was negatively impacted by landscape configurational heterogeneity.Our results suggested the importance of nonagricultural habitats in agricultural landscapes,such as waterbodies and forest,to benefit rice frog population persistenee. | Ben Li Wei Zhang Zhenghuan Wang Hanbin Xie Xiao YUAN Enle PEI Tianhou Wang | 2020 | Current Zoology2020，66，6： | 0 |
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