13 research outputs found

    SCAT弹头热防护的简化计算方法

    Get PDF
    对自适应发汗冷却(SCAT)弹头的热防护问题作了简化分析,导出了热防护的简化计算公式。对铊、铟、锡和水四种冷却剂的情况,给出了算例。文中的公式,计算简便,可作为弹头热防护设计的一种工程计算,亦可用于地模拟实验前的预算

    中国物理海洋学研究70年:发展历程、学术成就概览

    Get PDF
    本文概略评述新中国成立70年来物理海洋学各分支研究领域的发展历程和若干学术成就。中国物理海洋学研究起步于海浪、潮汐、近海环流与水团,以及以风暴潮为主的海洋气象灾害的研究。随着国力的增强,研究领域不断拓展,涌现了大量具有广泛影响力的研究成果,其中包括:提出了被国际广泛采用的"普遍风浪谱"和"涌浪谱",发展了第三代海浪数值模式;提出了"准调和分析方法"和"潮汐潮流永久预报"等潮汐潮流的分析和预报方法;发现并命名了"棉兰老潜流",揭示了东海黑潮的多核结构及其多尺度变异机理等,系统描述了太平洋西边界流系;提出了印度尼西亚贯穿流的南海分支(或称南海贯穿流);不断完善了中国近海陆架环流系统,在南海环流、黑潮及其分支、台湾暖流、闽浙沿岸流、黄海冷水团环流、黄海暖流、渤海环流,以及陆架波方面均取得了深刻的认识;从大气桥和海洋桥两个方面对太平洋–印度洋–大西洋洋际相互作用进行了系统的总结;发展了浅海水团的研究方法,基本摸清了中国近海水团的分布和消长特征与机制,在大洋和极地水团分布及运动研究方面也做出了重要贡献;阐明了南海中尺度涡的宏观特征和生成机制,揭示了中尺度涡的三维结构,定量评估了其全球物质与能量输运能力;基本摸清了中国近海海洋锋的空间分布和季节变化特征,提出了地形、正压不稳定和斜压不稳定等锋面动力学机制;构建了"南海内波潜标观测网",实现了对内波生成–演变–消亡全过程机理的系统认识;发展了湍流的剪切不稳定理论,提出了海流"边缘不稳定"的概念,开发了海洋湍流模式,提出了湍流混合参数化的新方法等;在海洋内部混合机制和能量来源方面取得了新的认识,并阐述了混合对海洋深层环流、营养物质输运等过程的影响;研发了全球浪–潮–流耦合模式,推出一系列海洋与气候模式;发展了可同化主要海洋观测数据的海洋数据同化系统和用于ENSO预报的耦合同化系统;建立了达到国际水准的非地转(水槽/水池)和地转(旋转平台)物理模型实验平台;发展了ENSO预报的误差分析方法,建立了海洋和气候系统年代际变化的理论体系,揭示了中深层海洋对全球气候变化的响应;初步建成了中国近海海洋观测网;持续开展南北极调查研究;建立了台风、风暴潮、巨浪和海啸的业务化预报系统,为中国气象减灾提供保障;突破了国外的海洋技术封锁,研发了万米水深的深水水听器和海洋光学特性系列测量仪器;建立了溢油、危险化学品漂移扩散等预测模型,为伴随海洋资源开发所带来的风险事故的应急处理和预警预报提供科学支撑。文中引用的大量学术成果文献(每位第一作者优选不超过3篇)显示,经过70年的发展,中国物理海洋学研究培养了一支实力雄厚的科研队伍,这是最宝贵的成果。这支队伍必将成为中国物理海洋学研究攀登新高峰的主力军

    Measurement of the Mechanical Properties of Breast Cancer Cells (MCF-7) Using the Atomic Force Microscopy

    No full text
    提出了一种基于Hertz模型的最优化方法,并研究了不同质量浓度(0,50,100,150和200μg/mL)的白藜芦醇培养36 h后的乳腺癌细胞(MCF-7)的杨氏模量和能量耗散变化情况。实验结果表明:基于Hertz模型的最优化方法相比于基于Hertz模型的高斯拟合法能使理论压痕曲线和实验压痕曲线更吻合;综合考虑细胞的杨氏模量与能量耗散比仅考虑细胞的杨氏模量,更能把不同状态的细胞之间的差异综合地表示出来。实验结果验证了基于Hertz模型的最优化方法相比于基于Hertz模型的高斯拟合法在计算杨氏模量上的优越性,并揭示了综合考虑杨氏模量与能量耗散的必要性

    Research for the Ecological Characteristics of the Food Zooplankton in Sansha Bay,Fujian Province

    No full text
    饵料浮游动物是海洋经济水产动物直接或者间接的饵料,对它的研究有着重要的理论意义和实用价值.根据2007年2、5、8、11月福建省三沙湾4个航次的调查资料,分析三沙湾饵料浮游动物的生态特征.共鉴定饵料浮游动物82种(类);饵料浮游动物生物量均值为94.52 Mg/M--3,占浮游动物总生物量的90.21%,生物量季节分布呈典型双峰型:春、秋两季高于夏、冬两季,且随着季节的变化,呈现不同的平面分布特点;丰度的季节变化和平面分布特点与生物量的季节变化趋势一致;分析结果显示,水温和不同流系是影响三沙湾饵料浮游动物季节变化与平面分布的主要因素.三沙湾饵料浮游动物群落多样性丰富,均匀度均较高,表现出较高的稳定性;小拟哲水蚤(PArACAlAnuS PArVuS)是三沙湾的主要优势种类.Based on 4 cruises seasonal data of investigation on February,May.August and November,2007 in Sansha Bay,Fujian Province,the research focused on the ecological characteristics of the food zooplankton.82 species of food zooplankton were identified.The mean value of biomass was 94.52 mg/m--3,which accounted for 90.21%of total zooplankton biomass.The biomass in spring and autumn were greater than in summer and winter,and its distribution showed different features with seasonal variation.The features of seasonal variation and distribution of abundance for food zooplankton were similar to biomass.The high diversity index and uniformity index showed the stability of food zooplankton community.Paracalanus parvus was the dominant species in Sansha Bay in each season.中国近海海洋综合调查与评价专项:福建近海经济海洋生物苗种资源调查项目(FJ908-01-01-MZ

    Discrimination of the state of MCF-7 cells by multiple cell mechanics

    No full text
    Cell mechanics indicating the state of cell play an important role in critical activities of the cells. However in recent cell mechanics research, most of researchers only considered the young's modulus and energy dissipation is seldom considered. The existing method of the computation of young's modulus can't also make sure the distance between experimental indentation curve and the theory experimental indentation curve is small. To solve the problems described above, an optimization method of computation of young's modulus has been proposed and an experiment has been carried out. In the experiment force curves were obtained from the MCF-7 cells which has been treated with different concentrations (0ug/ml, 50ug/ml, 100ug/ml, 150ug/ml, 200ug/ml) of resveratrol for 36 hours. Young's modulus and energy dissipation could be obtained from the force curves. The experiment results not only shown that compared with the existing method the proposed method has its superiority in the computation of young's modulus, but also indicated that there is a necessity of considering both Young's modulus and energy dissipation. The results provide an effective method for the computation of cell mechanics and lay a foundation for the drug selection and personalized treatment of diseases

    Industry intelligent terminal based on RFID data acquisition function

    No full text
    本实用新型涉及一种基于RFID数据采集功能的工业智能终端,包括:控制单元,提供交互界面显示接口、输入输出接口;射频数据采集单元,集成RFID读写控制模块,前端输入为射频前端电路,输出端与控制单元的总线接口相连;存储单元,包括闪存、SDRAM以及外扩存储卡,通过数据线接至控制单元;网络传输单元,具有以太网接口及CAN总线接口,通过网络切换电路切换实现控制单元与监控终端的通讯连接;显示单元,与控制单元的显示数据输出端相连,显示用户界面;电源管理单元,为其他电单元提供多等级的稳定电压,受控于控制单元内部的电源管理软件。本实用新型增强了系统处理复杂事件的能力,功能多,兼容性强

    Extraction of Genomic DNA and Amplification of mtDNA COI from Calanus sinicus Stored in Formaldehyde Solution

    No full text
    提取了保存于5%甲醛溶液中的单只中华哲水蚤基因组DNA.经凝胶电泳后虽无清晰条带,但PCR扩增后可得线粒体DNA细胞色素氧化酶I亚基基因(mtCOI)片段.测序分析,该片段长度为710bp,与GenBank中的序列(索引号AF332769)比对后确定为中华哲水蚤mtCOI序列的一部分.利用本实验方法所提取的基因组DNA可适用于系统发生、种群遗传结构等领域的分子水平研究,为保存在甲醛溶液中的小型海洋浮游动物的基因信息利用提供实用技术.The DNA extraction,in General,from samples stored in formaldehyde solution is inefficient,especially extracted from small individual.It is necessary extracting of DNA genome from formaldehyde samples which conserved in early days or fixed in formaldehyde solution which usually adopted in marine investigation. On the base of methods of DNA extraction used in other animals or tissues,genomic DNA is extracted from Calanus sinicus stored in 5% formaldehyde solution in this experiment.More attention was paid to the process of eliminating the formaldehyde solution at the very beginning and at the digestion period,we add DTT into the digestion reaction systemwhich are the most important steps in the whole experiment.The concentration of genomic DNA in the study is low relatively,but after efficient PCR amplification,mtDNA COI gene fragment (710 bp) was obtained.Then comparing with the sequence of Calanus sinicus recorded in Genbank (accession no.AF332769),it is sure of that what we get covers the recorded of GenBank,is Calanus sinicus mtDNA COI sequence.The study will serve other small pelagic crustacean for the extracting DNA genome.It can also apply to the research of phylogeny,the population genetics and so on at molecular level,providing the use of gene information of small marine zooplankton samples stored in formaldehyde solution with practical technique.国家重点基础研究发展规划 ( 973 )项目资助(G1999043708

    我国地球化学块体内矿产资源潜力预测

    No full text
    中国地质调查局发展研究中心 ; 中国地质大学(北京) ; 中国地质科学院地球物理地球化学勘查研究所 ; 新疆维吾尔自治区地质调查院 ; 贵州省地质调查院 ; 青海省地质调查院 ; 西藏自治区地质调查院 ; 甘肃省地质调查院 ; 四川省地质调查院 ; 云南省地质调查院 ; 宁夏回族自治区地质调查院 ; 内蒙古自治区地质调查
    corecore