地学中海量数据的并行可视化研究进展

地球科学中观测和数值模拟结果数据爆炸式的增长,给可视化和分析这些海量数据带来了极大的挑战,将海量数据并行可视化技术应用到地球科学中是解决这一问题的有效手段。地球科学中海量数据可视化是目前国际科学可视化研究的一个新方向。本文首先介绍海量数据并行可视化的几个步骤,然后总结了地球科学中海量数据的特点,重点讨论了海量数据并行可视化在地幔对流、地震波传播以及海啸数值模拟等可视化研究中的应用实例。     

High-Resolution Ultrasonic Imaging of Artworks with Seismic Interferometry for Their Conservation and Restoration

Artworks are an inseparable part of the cultural heritage of societies and provide us with a unique look at cultural developments through time and space. For the best possible conservation, it is paramount to know the constituent materials, condition, and construction techniques of the objects (e.g. painting on wood, fresco, sculpture). Such information is required not only for the surfaces of the objects, but also for the interiors; in the imaging discipline, this is known as depth imaging. Here, we introduce a new method for non-invasive depth imaging as an alternative to traditional non-invasive methods when the latter cannot be used to obtain the required information. We use ultrasonic transverse-wave transmission measurements and turn them into virtual reflection measurements. We achieve this by applying seismic interferometry with active sources. Obtaining reflection measurements by seismic interferometry allows us to apply an advanced imaging technique – prestack depth migration, as used in seismic exploration – to produce a high-resolution depth image of an object. We apply our method to ultrasonic data recorded on a mockup of a painting on a wooden support. We validate our method by comparing our results with an image from X-ray computed tomography.     

三角债的成因、危害及治理对策

三角债是一种复杂的债务链，形成原因复杂，危害严重本文主要从企业主的理念、会计制度、外部监管、法律手段、金融机构对企业的信用评定、开发金融新产品等方面提出了治理三角债的对策。     

地铁工程周边房屋的安全评价研究

随着国家城市化发展,工业化深入,城区交通问题越发突出,各大城市纷纷大规模开展地铁工程的建设,同时由于地铁开挖对沿线房屋必然会产生不良影响。但很多现有的评价标准仅仅给出经验的控制数值,不能很好地反映实际情况。本文根据国内外的现有评价标准和方法,并考虑地铁工程与周边环境的相互影响,利用DPI(damage potential index model)原理判断建筑的安全状况并划分等级,提出相对应的评价标准和监测要求。     

过度营销的危害及应对策略研究

随着市场的变化和竞争的加剧,市场营销得到越来越多企业的认同,发挥出重要作用.但也出现了过度营销的趋势,耗费了企业的财富、占用了社会的资源、损害了消费者的利益,给市场的稳步发展制造了障碍.本文对过度营销的表现形式、危害进行了分析,并提出了加强营销观念、适度运用营销组合、加大创新力度的建议,给企业提供了有益的借鉴.     

信丰县铁石口—小江煤矿区采空与疏干塌陷分析

信丰县铁石口—小江煤矿区采空与岩溶因地下水疏干引发大面积的地面塌陷、地裂缝和房屋墙体裂缝等地质灾害问题,给当地数千村民的生产生活带来较大影响,并已影响到105国道与京九铁路路基的稳定性。本文试从煤矿分布、开采历史与现状、地质环境条件等方面,结合已发生的地质灾害点位置、时间和规模,论述区内地质灾害发生缘由以及发生发展趋势,以期找出一点规律,为当地防灾减灾提供一定的帮助。     

论环境污染损害赔偿诉讼的证据法问题

本文立足于环境污染侵权行为的特殊性,探讨此类诉讼中的证据法问题。为了通过诉讼有效保护受害人的合法权益,笔者认为,在证明对象的具体内容方面,应从广义的角度理解加害行为违法性;对于财产、人身以及精神损害的事实,由受害人加以证明;对因果关系的证明则借助于证据法上的推定来进行。在举证责任分配方面,以“危险领域说”理论解决此类问题。对于诉讼过程中加害人与受害人的证明活动,应当坚持不同的证明标准。     

L型平面不规则结构的地震反应分析和评估

通过sap2000有限元软件,对建立的L型平面不规则结构进行了模态分析,得到了结构自身的动力特性。在此基础上,利用反应谱分析和时程分析对结构响应的结果进行数值模拟,得到了结构的抗震性能,为设计工作提供了一定参考。     

石油工程专业“地震勘探原理”立体化教学模式探索

“地震勘探原理”是石油工程专业必修课,该课理论性,动手能力要求高。本文通过对立体化教学内涵的解读,构建了“地震勘探原理”课程立体化教学模式,实现了课堂教学、实践教学和考核方式的立体化教学,有效地提高了教学质量。文章对该课程立体化教学模式的纵深改革提出了建议。     

A qualitative method for combining thermal imprints to emerging weak points of ancient wall structures by passive infrared thermography – A case study

The significant number of buildings constructed in the world before the appearance of compulsory earthquake projecting norms, as well as the subsequent construction in the safe seismic zones, requires a constant re-evaluation of the strength of the structures. For example, the 2009 earthquake happened in L’Aquila city (Italy), killed about 300 people. Furthermore, many old buildings, seriously damaged, were considered as historical monuments and their importance is still critical both from a cultural standpoint and for the city itself. On the basis of the surveys carried out by the Las.e.r. Laboratory (university of L’Aquila) before and after 2009 earthquake, this paper introduces the infrared thermography (IRT) as a mean to characterize particular thermal imprints that appear on ancient facades, employing the passive thermography, discussing the infrared images collected during several years, and analyzing their relationship with all kinds of influence factors, in order to validate the effectiveness of the technique and its role in preventive diagnosis.