基于ICE中间件的通用测震数据库网关应用研究

提出基于ICE测震数据库通用网关的构建方法,利用ICE可扩展性、可重用性、支持多种编程语言和分布式部署的特点,结合分布式中间件技术,定义开发一系列读写操作测震数据库通用接口,为测震数据应用提供多元化服务,实现业务逻辑与数据库访问相分离,同时增强测震业务系统的可扩展性与安全性.该数据库网关在全国测震实际相关业务系统中取得较好的应用效果.     

县域特色产业形成和演化机理研究进展

培育壮大县域特色产业是中国统筹区域城乡发展的战略重点之一, 研究县域特色产业也是区域可持续发展研究的重要内容。本文从理论视角、热点领域、研究方法3 个方面对近年来县域特色产业研究的重点进行了梳理。县域特色产业作为区域优势和产业特点的结合产物, 相关研究的理论视角基本属于人地关系地域系统的基础理论体系, 同时借鉴了生态学、系统学理论观点和分析框架, 为清晰刻画产业内外影响因子的共栖关系和互动效应提供了有效途径。从研究领域上看, 关注点从地方经济发展到全球生产网络、从传统影响因素到新因素, 与时俱进, 但是宏观研究和微观研究相互脱节现象突出, 在一定程度上影响了研究成果的实践指导意义。从研究方法上看, 相关研究正在从以定性描述和逻辑推理为主, 向定性和定量相结合的综合集成方法应用转变, 但受到数据可获取性的限制, 现象和变化趋势的驱动机制分析的技术方法亟待完善。     

2012��10��31����Ͽ����M L 3.8С��Ⱥ�о�

??2012??10??31??????????????M_L3.8С????????о?????????????????????????????????????????????????????????????????????10 km??????????????????????????????С??????????5 km???Χ???????????????????????????????????????????????λ?????????????????????????????????????????????????     

Seismic damage to structures in the <Emphasis Type="Italic">M</Emphasis><Subscript>s</Subscript>6.5 Ludian earthquake

On 3 August 2014, the Ludian earthquake struck northwest Yunnan Province with a surface wave magnitude of 6.5. This moderate earthquake unexpectedly caused high fatalities and great economic loss. Four strong motion stations were located in the areas with intensity V, VI, VII and IX, near the epicentre. The characteristics of the ground motion are discussed herein, including 1) ground motion was strong at a period of less than 1.4 s, which covered the natural vibration period of a large number of structures; and 2) the release energy was concentrated geographically. Based on materials collected during emergency building inspections, the damage patterns of adobe, masonry, timber frame and reinforced concrete (RC) frame structures in areas with different intensities are summarised. Earthquake damage matrices of local buildings are also given for fragility evaluation and earthquake damage prediction. It is found that the collapse ratios of RC frame and confined masonry structures based on the new design code are significantly lower than non-seismic buildings. However, the RC frame structures still failed to achieve the ‘strong column, weak beam’ design target. Traditional timber frame structures with a light infill wall showed good aseismic performance.     

Numerical simulation on the seismic absorption effect of the cushion in rigid-pile composite foundation

In order to quantitatively study the seismic absorption effect of the cushion on a superstructure, a numerical simulation and parametric study are carried out on the overall FEA model of a rigid-pile composite foundation in ABAQUS. A simulation of a shaking table test on a rigid mass block is first completed with ABAQUS and EERA, and the effectiveness of the Drucker-Prager constitutive model and the finite-infinite element coupling method is proved. Dynamic time-history analysis of the overall model under frequent and rare earthquakes is carried out using seismic waves from the El Centro, Kobe, and Bonds earthquakes. The different responses of rigid-pile composite foundations and pile-raft foundations are discussed. Furthermore, the influence of thickness and modulus of cushion, and ground acceleration on the seismic absorption effect of the cushion are analyzed. The results show that: 1) the seismic absorption effect of a cushion is good under rare earthquakes, with an absorption ratio of about 0.85; and 2) the seismic absorption effect is strongly affected by cushion thickness and ground acceleration.     

基于粒度控制的复杂储层渗透性建模方法

岩石颗粒大小反映了沉积岩结构的主要特征,是岩石岩性的主要评价指标,同时也是影响沉积物渗透性的主要因素。沉积环境在纵向上表现出来的差异性,使得粒序控制下的地层渗透性在纵向上也表现出非均质性。为了精细地描述由于粒度大小造成的渗透率的非均质性,本文首先结合岩心粒度分析资料,分析了研究区粒度大小对物性影响的规律,利用自然伽马、中子、密度、声波曲线,通过测井地质分析提取敏感参数,建立了粒度计算模型;然后以粒度为指标,建立了不同粒度大小条件下的渗透率计算模型。通过现场资料的处理及其与岩心资料的对比,认为这种渗透率建模方法能够较好地反映沉积物粒度对岩石渗透性的控制作用,能够更加精确地描述复杂岩性地层渗透率的非均质性特征,从而可为地质开发研究提供更为准确的渗透率剖面。     

乌兰布和沙漠不同下垫面冬季沙尘通量

为揭示乌兰布和沙漠不同下垫面冬季沙尘通量的垂直分布,在野外实地监测的基础上对乌兰布和沙漠3种下垫面冬季输沙量进行测量分析。结果表明：近地表0～100 cm高度内冬季输沙量流动沙丘 > 梭梭固定沙丘 > 白刺半固定沙丘。各下垫面输沙量随高度呈下降趋势,流动沙丘、白刺半固定沙丘、梭梭固定沙丘符合幂函数分布,流动沙丘、梭梭固定沙丘输沙量集中于0～20 cm高度,白刺半固定沙丘集中于0～40 cm高度。风沙流幂函数通量系数a、b与粒径< 0.1 mm和粒径 >0.5 mm颗粒含量负相关,与粒径0.1～0.25 mm颗粒含量正相关,与粒径0.25～0.5 mm颗粒含量不相关。沙粒跃移高度在流动沙丘、白刺半固定沙丘和梭梭固定沙丘分别集中于0～3.59、0～4.33和0～2.36 cm;跃移高度与粒径<0.05 mm和0.1～0.5 mm颗粒含量正相关,尤其与粒径0.1～0.25 mm颗粒含量呈指数函数正相关,与粒径0.05～0.1 mm及>0.5 mm颗粒含量无明显相关性。乌兰布和沙漠流动沙丘在冬季仍具有较大的侵蚀状态,白刺半固定沙丘处于弱风蚀状态,梭梭固定沙丘处于堆积状态,造成地表积沙。在冬季,梭梭固定沙丘仍然发挥着防风固沙的能力,成为冬季固定风沙的重要防线。     

鄂尔多斯盆地华池地区长6油层组湖底扇内深水重力流沉积特征

以岩心的详细观察与测井录井资料综合分析为基础,通过岩石学特征和原生沉积构造等沉积相标志分析,确定鄂尔多斯盆地华池地区长6油层组厚层块状砂体属于半深湖内的深水重力流沉积体系。划分出内扇、中扇和外扇3个亚相,该区主要以中扇亚相最为发育;在深水重力流中识别出液化沉积物流、砂质碎屑流、近源浊流和远源浊流等沉积类型,建立了湖盆深水重力流沉积模式。砂质碎屑流沉积最为广泛,砂体厚度大,连片发育,具有最好的储集层物性,含油性好,是华池地区长6油层组最有利的储集层。     

An interval-parameter mean-CVaR two-stage stochastic programming approach for waste management under uncertainty

In this research, approaches of interval mathematical programming, two-stage stochastic programming and conditional value-at-risk (CVaR) are incorporated within a general modeling framework, leading to an interval-parameter mean-CVaR two-stage stochastic programming (IMTSP). The developed method has several advantages: (i) it can be used to deal with uncertainties presented as interval numbers and probability distributions, (ii) its objective function simultaneously takes expected cost and system risk into consideration, thus, it is useful for helping decision makers analyze the trade-offs between cost and risk, and (iii) it can be used for supporting quantitatively evaluating the right tail of distributions of waste generation rate, which can better quantify the system risk. The IMTSP model is applied to the long-term planning of municipal solid waste management system in the City of Regina, Canada. The results indicate that IMTSP performs better in its capability of generating a series of waste management patterns under different risk-aversion levels, and also providing supports for decision makers in identifying desired waste flow strategies, considering balance between system economy and environmental quality.     

Preliminary assessment of the navigation and positioning performance of BeiDou regional navigation satellite system

BeiDou regional navigation satellite system(BDS)also called BeiDou-2 has been in full operation since December 27,2012.It consists of 14 satellites,including 5 satellites in Geostationary Orbit(GEO),5 satellites in Inclined Geosynchronous Orbit(IGSO),and 4 satellites in Medium Earth Orbit(MEO).In this paper,its basic navigation and positioning performance are evaluated preliminarily by the real data collected in Beijing,including satellite visibility,Position Dilution of Precision(PDOP)value,the precision of code and carrier phase measurements,the accuracy of single point positioning and differential positioning and ambiguity resolution(AR)performance,which are also compared with those of GPS.It is shown that the precision of BDS code and carrier phase measurements are about 33 cm and 2 mm,respectively,which are comparable to those of GPS,and the accuracy of BDS single point positioning has satisfied the design requirement.The real-time kinematic positioning is also feasible by BDS alone in the opening condition,since its fixed rate and reliability of single-epoch dual-frequency AR is comparable to those of GPS.The accuracy of BDS carrier phase differential positioning is better than 1 cm for a very short baseline of 4.2 m and 3 cm for a short baseline of 8.2 km,which is on the same level with that of GPS.For the combined BDS and GPS,the fixed rate and reliability of single-epoch AR and the positioning accuracy are improved significantly.The accuracy of BDS/GPS carrier phase differential positioning is about 35 and 20%better than that of GPS for two short baseline tests in this study.The accuracy of BDS code differential positioning is better than 2.5 m.However it is worse than that of GPS,which may result from large code multipath errors of BDS GEO satellite measurements.