灾害防御工程的经济效益评价原理及方法——以水坝震害防御工程为例

根据价值工程理论和成本-效益理论,在作者提出的防灾工程功能函数、成本函数、价值函数、效益函数等灾害经济学基本函数及数学模型的基础上,结合地质灾害防御工程实例,探讨了防灾工程经济效益的评价原理及方法。     

黔西二叠纪玄武岩及岩浆来源初步分析

本文以织金熊家场剖面为例进行岩石学及岩浆来源分析研究。岩性和岩石化学特征表明,区内玄武岩为碱性—钙碱性拉斑玄武岩。同位素地球化学和稀土元素分布模式研究资料表明,本区玄武岩原始岩浆来源于地壳和地幔二元组分相混合的体系。通过锶同位素组成的计算,显示了原始岩浆中的幔源和壳源二元组分的混合比例为5.4:1。     

黄河三角洲水冰险情预警信息系统设计与分析应用探讨

本文探讨了黄河三角洲地区水冰灾情信息系统的建立方法及其应用问题。介绍了该系统的设计原则,数据结构,建立方法和程序,并对其应用进行了分析研究。该方法也适用于其它区域。     

广东封开蚀变花岗岩中的黑铋金矿

黑铋金矿产于广东封开蚀变花岗岩中,主要伴生矿物有自然金、自然铋、碲铋矿。该矿物的颜色为银白色,在反光镜下反射色为灰色带黄绿色色调,经能谱分析结果Au=65.28%,Bi=34.72%,计算分子式为Au_(1·995)Bi_(1·000),反射率测定为51.5(405mm),48.9(436nm),50.9(480nm)53.7(644nm),51.9(656nm),42.1(700nm)。对该矿物还作了X射线粉晶衍射分析。     

云南滇池地区风化磷块岩的风化指标研究

长期风化作用使云南滇池地区形成了大面积的风化磷块岩矿石,这种矿石是制取高效磷肥的优质原料。为了圈定这些风化磷块岩矿石,须确定适宜的风化指标。笔者通过风化磷块岩形成过程化学组分变化研究,首次提出将风化指标分为“直接法”和“间接法”两类,进而提出ＣＯ２风化指标为直接法中指标,２Ｐ２Ｏ５＋Ａ．Ｉ＾１）风化指标为间接法中推荐指标。     

Late Pleistocene - Holocene slip history of the Langshan-Seertengshan piedmont fault (Inner Mongolia,northern China) from cosmogenic <Superscript>10</Superscript>Be dating on a bedrock fault scarp

Offset geomorphic features and deformed late Quaternary strata indicate active deformation along the Langshan-Seertengshan piedmont fault (LSPF), one of the most active faults in the Hetao fault zone in Inner Mongolia, North China. The widespread occurrence of bedrock fault scarps along the LSPF offers excellent opportunity to examine the faulting history. Using cosmogenic ¹⁰Be exposure dating, we measured the exposure ages of the western Langshankou scarp, located in the middle segment of the LSPF. Our data revealed at least two earthquakes that occurred at 22.2±3.3 ka and 7.2±2.4 ka, respectively. These events are consistent with previous paleoseismic trench studies. The regression of the relationship between the age and sampling height along the scarp yield a fault slip rate of 0.10 +0.05/-0.06 mm/yr, which is significantly lower than the average post-late Pleistocene fault slip rate of ~1 mm/yr, as estimated from the offset of the T2 terraces by previous studies. This indicates that the slip of the LSPF may have been accommodated by other fault branches.     

Modified Peierls–Nabarro dislocation equation for $$ \left\langle {\text{110}} \right\rangle {\{ 1\bar{1}0\} } $$ dissociated superdislocations in perovskite CaSiO3

In the paper, we investigate the core width of superpartials and dissociated width of the 〈110〉{1–10} superdislocations in CaSiO₃ perovskite under pressures of 30 and 100 GPa by using the modified P–N dislocation equation. Our results show that when taking into account the discrete effect correction, core width of superpartials and dissociated width become much wider, and both of them increase significantly with the increase of the superdislocation angle. Furthermore, it is found that the dissociated width and core width of superpartials are determined by value of the unstable stacking fault energy and antiphase boundary energy, which are independent of the position of unstable stacking energy. Interestingly, the Peierls stress of superpartials can be predicted by using the variational method to solve the modified P–N dislocation equation.     

FY3地面业务系统关键信息短信报警平台的设计及实现

FY3卫星地面业务系统关键信息短信报警平台为高可靠极轨业务系统运行提供了保障。从报警监视关键监视点的选取、轨道接收圈的智能判别,平台报警信息的处理以及保证软件的高时效性出发,讨论了FY3卫星轨道可能出现的情况,提出了两种判别算法并进行了取舍。针对平台报警信息处理以及保证软件高时效性,对FY3卫星的接收时间特性进行了分析并基于此设计报警短信过滤逻辑及基本软件结构。该平台已在实际工程中应用并取得了良好效果,本文最后给出了运行统计数据。