常用海图投影平面上大椭圆航线的表象与曲率分析

利用空间矢量方法推导出了椭球面上只与起止点地理坐标有关的大椭圆航线方程,代入4种常用海图投影的正解公式,得到不同投影平面上的大椭圆参数方程;利用上述参数方程进而推导出了不同投影面上大椭圆航线的曲率与曲率半径公式。选取伦敦到纽约的大椭圆航线为例,通过绘制不同投影面上的大椭圆航线并分析其曲率、曲率半径变化曲线可知,大椭圆航线在日晷投影上的表象为曲率处处为0的直线,而在其他投影面上的表象为曲率较小但不断变化的曲线。利用推导的曲率半径公式可以计算各类大椭圆航线上任意位置的“代曲直距”,方便在不同比例尺的海图上对大椭圆航线进行量测和绘制,提高作图效率。     

AIRS卫星温度和臭氧廓线在南极的验证分析

利用2008年中山站、Amundesen-Scott(SouthPole)站和Neumayer站为期一年的温度和臭氧探空数据,对AIRS第六版温度和臭氧垂直廓线产品在南极的精度进行了验证.结果表明,AIRS温度与探空温度总体上具有显著的一致性,其中对流层偏差最小(RMSe<2℃),近地面温度由于受到下垫面影响偏差略大(RMSe～2℃),平流层偏差较大(2℃相似文献   

THE BRINE SHRIMP (ARTEMIA PARTHENOGENETICA) AS ENCAPSULATION ORGANISM FOR PROPHYLACTIC CHEMOTHERAPY OF FISH AND PRAWN

Brine shrimp (Artrmia parthenogenetica) which had ingested three water-insoluble antibactrial drugs ie.sulfadiazine(SD), oxytetracycline (OTO) and erythromycin estolate (ERY-Es) were fed to TiIapia andMysis Ⅲ of Penaeus orientalis K..The drug contentS in the predators were then determined. Aferadministration of drugs to TiIapia and Mysis Ⅲ, through the bio-encapsulation of the brine shrimp,efficacious therapeuical concenration of OTC and ERY-Es(but not SD) in the pndators could bereached and meintained for mere than 8 hours.     

一个甚高频频率合成器的设计

介绍一个专用甚高频频率合成器的设计方案和实施中的一些关键技术．该合成器输出频率范围为９９．３ＭＨｚ～１００．７ＭＨｚ；步距分粗（２０ｋＨｚ）细（１００Ｈｚ）两档；输出短期频率的稳定度为３×１０（－９）／２５ｍｓ和１×１０（－１０）／ｓ．     

Circulation Features Associated with the Record-breaking Typhoon Silence in August 2014

Climatologically, August is the month with the most tropical cyclone(TC) formation over the western North Pacific(WNP) during the typhoon season. In this study, the reason for abnormal TC activity during August is discussed—especially August 2014, when no TCs formed. The large-scale background of August 2014 is presented, with low-level large-scale easterly anomalies and anticyclonic anomalies dominating over the main TC genesis region, a weak monsoon trough system,and a strong WNP subtropical high(WPSH), leading to significantly reduced low-level convergence, upper-level divergence,and mid-level upward motion. These unfavorable large-scale conditions suppressed convection and cyclogenesis. In August2014, equatorial waves were inactive within the negative phase of the Madden–Julian Oscillation(MJO), with fewer tropical disturbances. Although the low-level vorticity and convection of those disturbances were partly promoted by the convective envelopes of equatorial waves, the integral evolution of disturbances, as well as the equatorial waves, were suppressed when propagating into the negative MJO phase. Moreover, the upper-level potential vorticity(PV) streamers associated with anticyclonic Rossby wave breaking events imported extratropical cold and dry air into the tropics. The peripheral tropospheric dryness and enhanced vertical wind shear by PV streamer intrusion combined with the negative MJO phase were responsible for the absence of TC formation over the WNP in August 2014.     

东昆仑南缘早三叠世洪水川组的源区特征:来自碎屑组成、重矿物和岩石地球化学的证据

分布于东昆仑南缘的早三叠世洪水川组系一套由砾岩、砂岩、页岩和鲕粒灰岩等浅海相和河流相沉积物构成的弧前盆地沉积组合.砂岩碎屑组成、重矿物组合、岩石地球化学和古水流综合研究结果表明,洪水川组砂岩物源主要来自于北侧的岛弧带,同时南侧的阿尼玛卿蛇绿混杂带也为其形成提供了部分物源;源区主要出露长英质岩石、变质岩和硅质岩.     

GIS组件分类与检索技术的研究和应用

讨论了组件分类和匹配原理，并对签名匹配法进行了研究，把它作为从已知的组件中获取可重用组件的方法，最后提出了在国土信息管理领域中GIS组件的解决方案。     

大气阻力对静稳态飞行目标落点预报影响评估

大气阻力对高空静稳态飞行目标运行轨迹的影响是航天测控领域的研究热点与难点问题。在分析空间飞行器受力状况基础上,根据飞行器运动学状态方程,通过数值模拟方式定量评估了大气阻力对飞行器运行轨迹影响。结论表明:在再入段中,大气阻力是影响飞行器运行轨迹的最主要影响因素,对飞行器落点位置会造成数百米乃至数千米位置偏差,同时使落地时间有较大变化。     

基于 JavaScript 的地理事件可视分析框架设计

随着互联网的飞速发展,网络环境下地理信息的可视化表达成为研究的热点。在JavaScript技术和可视分析技术研究基础上,对互联网中地理事件可视分析框架进行设计,目的是探索网络环境下,地理事件可视化的表达方式和可行性分析,搭建适合互联网的地理事件可视分析框架,为基于Web的地理信息可视分析系统的实现打下基础。     

Identification of SNARE proteins in fish-Tilapia Oreochromis niloticus

1 IntroductionSecretion is a basic function of all living organ-isms. In fish, like in mammals, neurotransmitters,hormones, enzymes and other macromolecules aresecreted in several neuronal, neuroendocrine and ex-ocrine organs and tissues located in brain,…