大气辐射计算的吸收系数分布模式

全面论述了大气辐射计算中的吸收系数分布（#FKk#FS分布）模式,包括均匀路径的#FKk#FS分布模式以及非均匀路径的相关#FKk#FS分布模式。重点是利用吸收系数重排计算大气吸收气体分布函数和相关#FKk#FS分布函数的方法。某些结果系作者第一次公开发表。     

WEC-透空式防波堤集成装置能量转换效率研究

基于成本共享理念的波浪能发电装置(WEC)的开发与设计为降低建设成本提供了新的研究思路,应用计算流体力学方法对在透空箱式防波堤前附加垂荡浮子的集成装置进行数值模拟研究,主要研究了流体黏性和非线性PTO系统以及浮子形状对此类集成装置能量转换效率的影响。结果表明,此类集成装置可以获得较高的波能捕获宽度比(CWR),最高可达0.7,可以较好地利用反射波波能。共振区间上受黏性影响较大,相比于线性无黏理论解,CWR下降明显;实现了2种非线性PTO系统的模拟,有待于进一步的优化未获得更高的CWR值;浮子形状优化效果明显,采用圆底形浮子受黏性影响更小,可以获得更大的CWR值。此种集成模型的模拟和研究可以为新型防波堤设计和现有防波堤的改造提供思路和参考。     

露天煤矿截水帷幕防渗膜垂向隐蔽铺设施工工艺

防渗膜（HDPE土工膜）目前广泛应用于防污染、防渗漏、防扩散为主的防渗工程中,且铺设形式复杂多样。在我国某露天煤矿地下截水帷幕工程中,将防渗膜进行大深度垂向隐蔽铺设,深度可突破50 m,作为帷幕墙防渗主体;利用接头箱技术,实现了不同槽段间的防渗膜叠覆连接;通过注浆回填工艺,在压紧防渗膜的同时,提高了帷幕墙的抗渗性;最后采用围井抽水试验验证了墙体的防渗性,结果表明,防渗膜帷幕墙渗透系数仅为8.6×10^-7 cm/s,达到设计要求。防渗膜帷幕墙具有施工效率高、成本低、绿色环保等优点,其成功应用对其他类似项目具有推广借鉴意义。     

辽南晚前寒武纪地层层序问题的研讨

辽南晚前寒武纪地层层序问题的研讨张丕孚（地科院沈阳地矿所,辽宁沈阳,１１００３２）关键词地层层序,叠接,标志层,晚前寒武纪,辽南地区长期沿用的辽南晚前寒武纪地层层序为永宁群（松树组、朵子山组、庙山组）、细河群（钓鱼台组、南芬组、桥头组）、五行山群（长...     

塔木察格盆地南贝尔凹陷东次凹构造转换带与油气成藏关系

塔木察格盆地位于蒙古国东部,与中国的海拉尔盆地同属一个盆地,为叠置于兴蒙造山带之上的拉张一挤压型中新生代陆相断陷盆地.南贝尔凹陷位于海拉尔一塔木察格盆地中部断陷带的中部,面积为3 200 km2.南贝尔凹陷东次凹南一北洼槽构造转换带位于南贝尔凹陷东次凹中部,为反向聚敛叠覆型构造转换带,是重要的含油气构造带.转换带对油气...     

结合八叉树和最近点迭代算法的点云配准

针对最近点迭代算法的局限性造成的点云配准效率低下问题,该文对最近点迭代算法在点云配准中的应用进行了研究,并针对算法的局限性进行了改进。先利用八叉树结构求得点云数据的重叠区域,然后在重叠区域利用最近点迭代算法对点云数据进行精确配准,提出了基于八叉树结构建立点云重叠区域的最近点迭代配准方法(该文简称OTOAICP)。通过实例数据对该方法进行验证,结果表明:OTOAICP方法能够提高配准精度,缩短配准时间。     

Numerical Simulation of Self-Excited and Forced Vibration of Circular Cylinders in Current

Numerical simulations of a low-mass-damping circular cylinder which can oscillate freely at transverse and streamwise directions are presented in this work.The Navier-Stokes equations are solved with finite volume method,and large eddy simulation of vortex is also performed in the calculation.In order to implement dynamic mesh,overlapping grids are generated to lessen the computation for mesh field itself.Self-excited vibrations are firstly calculated to obtain the average amplitudes and frequencies of the target circular cylinder in the current flow situation,and then forced oscillations are implemented with parameters obtained in vortex-induced vibrations previously.With slight amplitude modulation,time series of displacements in vortex-induced vibrations are essentially harmonic.Regarding the fluid force,which are larger in forced oscillations than those in corresponding self-excited cases because the fluid subtracts energy from the forced cylinders.The phase angles between forces and displacements are 0° and 180° for self-excited case and forced case respectively.In vortex-induced vibrations,the interactions between fluid and structure produce some weakly energetic vortices which induce the modulations of amplitude and frequency.     

综合指标叠套方法在海上雷暴预报中的应用

在前人研究陆上雷暴的经验基础上,采用综合指标叠套的方法,探讨不同海域雷暴的影响因子及其预报。选取的预报参数主要包括温度露点差、相对湿度、层结稳定度、对流有效位能、抬升指数、BOYD指数、全总指数、K指数、SWEAT指数、SWISS00、水汽通量散度等15个指标,并分区域确定各自的阈值。对2013年6月东海和南海区域雷暴进行试预报,准确率可达到70%以上,且有效减少漏报率。可见,选取的预报因子及其阈值是有效的,综合指标叠套方法用于海上雷暴的预报是可行的。     

Investigating the Effectiveness of an Efficient Label Placement Method Using Eye Movement Data

Abstract

This paper focuses on improving the efficiency and effectiveness of dynamic and interactive maps in relation to the user. A label placement method with an improved algorithmic efficiency is presented. Since this algorithm has an influence on the actual placement of the name labels on the map, it is tested if this efficient algorithms also creates more effective maps: how well is the information processed by the user. We tested 30 participants while they were working on a dynamic and interactive map display. Their task was to locate geographical names on each of the presented maps. Their eye movements were registered together with the time at which a given label was found. The gathered data reveal no difference in the user’s response times, neither in the number and the duration of the fixations between both map designs. The results of this study show that the efficiency of label placement algorithms can be improved without disturbing the user’s cognitive map. Consequently, we created a more efficient map without affecting its effectiveness towards the user.     

Relocating ruptures of two M6 earthquakes in Zhongba, South-central Tibet in 2004 and 2005 with seismological and geodetic methods

To better understand repeatability of strong earthquakes in previously ruptured zones during one seismogenic period, we studied the rupture zones of the doublet of M6 earthquakes in Zhongba region of southcentral Tibet, China, in 11 July 2004 and 7 April 2005, respectively. We focused on the overlapping degree of two strong quakes’ aftershock areas one week after the mainshocks by using the SQH station in China Seismic Network and a 68-stations temporary broadband seismic array, a part of the international ...