Hydrothermal venting has a profound effect on the chemical and biological properties of local and distal seawater and sediments. In this study, lipid biomarkers
强制进化随机游走算法优化换热网络时,以一定的概率接受差解可有效促进结构进化,非贪婪性的差解搜索机制是目标函数跳出局部极值的关键.本文分析接受差解机制的作用,探究不同
In terms of downward transport, suspended particulate matter (SPM) from marine or terrigenous sources is an essential contributor to the carbon cycle. Within me
领先用户的需求能够反映出市场和技术的发展趋势,准确地识别领先用户并对其领先性进行排名,对企业开展开放式创新和提升创新绩效意义重大。本研究根据创新社区中用户的特征,从活跃性、创新性、共享性和影响力4个维度构建领先用户识别指标体系,在此基础上提出了基于凝聚层次聚类算法的领先用户识别方法,然后通过灰色关联分析方法计算用户领先性以实现用户排名。对以华为产品定义社区的实例进行实例分析的结果表明:本文提出的领先用户识别方法可以准确地识别出创新社区中的领先用户,并反映出领先用户之间的差异。此研究结果可为企业识别和筛选领
Dietary studies of polyps and ephyrae are important to understand the formation and magnitude of jellyfish blooms and provide important insights into the marine
高山滑雪比赛是冬季奥运会的重要组成部分,被誉为“冬奥会皇冠上的明珠”,比赛时运动员最高时速可达248km/h.为了保证比赛的公平性,前后出发的滑雪运动员的赛道雪质状态需要
Based on the Ricker-type models, the spawning stock-recruitment (S-R) relationship of Portunus trituberculatus was analysed under the impacts of environmental f
X-ray scintillators have been widely used in many fields owing to their strong penetrating ability,including security inspection,medical imaging,nuclear cameras
In this research,a conjugated Pc-MIL-88B(Fe)nanoplatform was constructed via a condensation process between modified zinc phthalocyanine and MIL-88B(Fe)for the
伴随着全球经济增长方式的变化和产业经济结构的调整,以绿色、和谐、可持续为目标的经济增长和社会发展方式成为世界范围内的主要趋势.发达国家积极实施可持续发展战略下的绿