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- Nikkomycin is a kind of new antifungal matibiotics.More than 20 biologically active nikkomycin structures have been isolated and the main active structures are nikkomycins X, Z, I, J. 尼可霉素是一种新的抗真菌抗生素,在分离到的20多种活性单组分中,X、Z、I、J为主要生物活性组分。
- Location of line in a mountainous environment in which active structures are well developed is a major engineering-geological problem concerned in railway and highway construction. 在活动构造发育的山地环境进行选线是铁路、公路等工程建设关注的重大工程地质问题。
- Active Structure Acoustic Control(ASAC) is the leading field in the area of Vibration and Noise Control. 结构振动声辐射主动控制技术(ASAC)是目前国际上振动噪声主动控制研究领域的前沿方向之一,有着巨大的潜在应用价值。
- An error sensor strategy is a key step in implementing an active structural acoustic control(ASAC). 误差传感策略是实现主动结构声学控制的关键的一环。
- In order to reduce sound radiation of a structure, the method of Active Structural Acoustic Control (ASAC) was developed in the 1980s. 自八十年代后期以来,为了更为有效地降低结构声辐射,人们提出了主动结构声学控制(ASAC)。
- It is often the case of reform initiatives around the world that what gets noticed and disseminated are often the activity structures and curriculum resources that were generated. 根据世界各地的教改经验,制度形式和课程内容的变更往往最引人注目及惹起谈论。
- Conclusion: The result suggests that the ES is a very metabolically active structure and has a pressure regulating function. 毛细血管与淋巴窦构成一个完整、细密的网状结构。
- An active structure acoustic control system (ASAC) used in an vibro-acoustic rectangle enclosure is presented with the objective of minimizing acoustic energy density. 以矩形封闭空间结构振动-声耦合系统的为研究对象,采用力控方式,建立了以声能量密度最小为控制目标的自适应主动结构声控制系统(ASAC)。
- Polynomial interpolating compensation algorithm for the time-delay of active structural control system was proposed, which is proved to be valid through a numerical example. 算例分析表明,时滞补偿后系统的控制效果有了明显的改善,说明该时滞补偿方法是有效的。
- The orient has been playing an active role in the world economy. 亚洲一直在世界经济中发挥积极作用。
- He is an active member of the school's stamp club. 他是学校集邮俱乐部的一名活跃会员。
- An active volcano may explode at any time. 活火山随时都有可能爆发。
- Is it wise to engage in active sports at your age? 我这样的年纪积极参加体育活动是否明智?
- She was active as a left-winger in the party. 她是党内积极的左翼分子。
- He was very active and rode down several horses. 他劲头很大,一连骑了好几匹马。
- The development in the study on the dynamics of activated structure can promote the study on continental geodynamics. 活化构造动力学机制的研究发展,是对大陆动力学研究的促进。
- She plays an active part in local politics. 她积极参与地方政治活动。
- The steel market will continue to be active. 钢材市场将会继续保持活跃。
- An active volcano may erupt at any time. 活火山随时可能喷发。
- In the active structural acoustic control based on radiation modes,the cancellation of the dominant radiation modes and determination of the arrangement of secondary forces are of virtual important. 在基于声辐射模态理论的结构声有源控制中,主导辐射模态的确定及抵消策略是至关重要的,它直接决定次级力源的优化布放及有源控制的效果。