1987年El Nino后期（9—11月）西太平洋大气静力能的收支     

马柱国  姚兰昌 《高原气象》1992,11(1):66-72

本文利用中科院1987年西太平洋考察资料和中央气象局出版的太平洋、大西洋资料反演出了一套利用温度和高度求算湿度的方法。通过该方法并利用美国国家气象中心的KWBC(5°N×5°S网格点资料)的温度和高度资料,计算了1987年厄尔尼诺期间9—11月西太平洋海域(0—30°N,120—170°E)大气静力能量的变化及其与周围的交换。结果表明,在这个时期,该区域上空大气是强的能源区,区域向周围输出能量。  相似文献   

Analytical comparison of geomagnetic total field between Sino-US stations     

Zhijia Zhan  Fuxin Yao  M. Johnston  R. Mueller  Jintian Gao 《地震学报(英文版)》1992,5(4):807-813

Using observational data of geomagnetic total intensity from 13 stations in the Beijing-Tianjin region, 3 stations in the western Yunnan region of China, and 6 stations in California of U. S. A., the daily variations and their spectra of geomagnetic total intensity were analyzed and compared. The results show that the morphology, the range and spectrum of daily variations in geomagnetic total intensity are basically the same within the local extent of 100–200 km and are different in the large extent of 500 km. The latitude factor of the daily variation range of geomagnetic total intensity is about 1–2 nT/degree within the latitude extent of 25°–40°. The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 83–89, 1992. This work is supported by the State Seismological Bureau and the Chinese Joint Seismological Science Foundation, and U.S. Geological Survey.  相似文献   

快速射线追踪及其在地震层析中的应用     

王修琼  姚政生 《内陆地震》1990,4(1):27-32

在地震层析研究中,常常涉及地震波在非均匀介质中的传播路径问题,故快速射线追踪是不可缺少的工具。本文讨论了一种以三点法为基础的逐步逼近的射线追踪方法,其优点是计算速度快、精度高,适合地震层析研究的计算要求。  相似文献   

由地震图上的终止相研究1976年松潘续发性大震的震源破裂过程   总被引：2，自引：0，他引：2  

秦保燕  姚兰予  汪进  李亚荣 《地震工程学报》1990,12(2):1-15

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A model for solar radio pulsations at short centimetric band     

Huang Guang-Li  Qin Zhi-Hai  Yao Qi-Jun 《Astrophysics and Space Science》1996,243(2):401-412

In this paper, the observed solar radio pulsations during the bursts at 9.375 GHz are considered to be excited by some plasma instability. Under the condition of the conservation of energy in the wave-particle interaction, the saturation time of plasma instabilities is inversely proportional to the initial radiation intensity, which may explain why the repetition rate of the pulsations is directly proportional to the radio burst flux at 9.375 GHz as well as 15 GHz and 22 GHz. It is also predicted that the energy released in an individual pulse increases with increasing the flux of radio bursts, the modularity of the pulsations decreases with increasing the flux of radio bursts, these predictions are consistent with the statistical results at 9.375 GHz in different events. The energy density of the non-thermal particles in these events is estimated from the properties of pulsation. For the typical values of the ambient plasma density (10⁹ cm^–3) and the ratio between the nonthermal and ambient electrons (10^–4), the order of magnitude of the energy density and the average energy of the nonthermal electrons is 10^–4 erg/cm³ and 10 kev, respectively. It is interesting that there are two branches in a statistical relation between the repetition rate and the radio burst flux in a special event on March 11–17, 1989, which just corresponds to two different orders of magnitude for the quasi-quantized energy released in these five bursts. This result may be explained by the different ratios between the thermal and the nonthermal radiations.  相似文献   

Dynamic Fracture Properties of Rocks Subjected to Static Pre-load Using Notched Semi-circular Bend Method     

Rong Chen  Kang Li  Kaiwen Xia  Yuliang Lin  Wei Yao  Fangyun Lu 《Rock Mechanics and Rock Engineering》2016,49(10):3865-3872

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Dependence of Dynamic Tensile Strength of Longyou Sandstone on Heat-Treatment Temperature and Loading Rate     

Wei Yao  Ying Xu  Wei Wang  Patrick Kanopolous 《Rock Mechanics and Rock Engineering》2016,49(10):3899-3915

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An Experimental Study of Dynamic Tensile Failure of Rocks Subjected to Hydrostatic Confinement     

Bangbiao Wu  Wei Yao  Kaiwen Xia 《Rock Mechanics and Rock Engineering》2016,49(10):3855-3864

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塔里木东北缘坡十Ni矿化侵入体中橄榄石和铬尖晶石对成岩成矿及源区特征的约束   总被引：1，自引：0，他引：1       下载免费PDF全文

薛胜超  秦克章  唐冬梅  毛亚晶  姚卓森  康珍 《地质科学》2016,(4):1181-1203

坡十Ni矿化超镁铁侵入体的矿化岩相主要为第二侵入期次的（斜长）单辉橄榄岩、（斜长）二辉橄榄岩、 纯橄岩等岩相。坡十超镁铁岩的橄榄石成分变化范围较大, 橄榄石的Fo值在76.8～89.6之间, Ni含量为767×10^-6～4 580×10^-6。铬尖晶石的Mg^#值和Cr^#值变化范围分别为19.4～41.9和49.8～64.8, 原生铬尖晶石中Cr₂O₃和Al₂O₃表现为负相关, 蚀变改造的铬尖晶石则表现为正相关。橄榄石成分剖面显示坡十母岩浆处于一个动态的岩浆系统中, 成分稳定的新鲜岩浆的补给、 持续向上的动力及浅部橄榄石快速分离结晶,造成了不同深度橄榄石成分的不同变化。坡十侵入体母岩浆估算结果为MgO=14.49％, FeO=10.01％,模拟结果显示橄榄石中Ni含量的变化主要受橄榄石结晶分异和硫化物不混溶作用共同控制,其中橄榄石与硫化物熔体发生明显的Fe-Ni交换反应。坡十母岩浆中橄榄石分离结晶造成的硫饱和,是坡十硫化物熔离的重要因素。橄榄石高Fo值、母岩浆高MgO、超镁铁岩中斜长石发育、矿物高结晶温度和铬尖晶石成分的弧岩浆特征显示,塔里木东北缘坡十侵入体是俯冲交代的岩石圈地幔部分熔融形成的母岩浆的产物,表现出低压高温的演化特征,其中源区熔融机制可能与塔里木二叠纪地幔柱提供的热源或该区大规模拆沉作用造成的软流圈上涌有关。  相似文献   

气象信息微信公众服务平台设计与应用开发     

姚巍  宫志宏  李仁禹  连高欣 《气象科技》2016,44(4):571-575

为了进一步拓宽气象信息的发布手段和发布渠道,提升气象服务能力和水平,使社会公众能够便捷地获取到丰富的气象信息。研究依托天津滨海新区气象信息Web服务端,以微信为基础平台,应用Java编程语言、Oracle数据库,Hibernate和Spring框架等技术,通过对微信公众平台API进行开发,以图表、文字、GIS图等展现方式,开发了基于微信网络社区软件的公益气象信息服务平台。本研究充分利用了新型移动传媒发布气象信息的手段,实现了气象信息多形式服务于社会公众,可达到公众及时掌握气象信息的需求。  相似文献