高强混凝土高温性能研究进展

对近年来高强混凝土高温性能的研究成果进行了综述与分析,包括热工性、高温下和高温后力学性能以及高强高性能混凝土的爆裂性能。其中,高强混凝土热工性能方面的研究成果较少且研究结果离散性较大;高强混凝土力学性能方面的研究主要集中于抗压强度、抗拉强度、变形性能、弹性模量、泊松比、应力 应变关系等,而对高强混凝土结构、构件高温力学性能和温度场分析方面的研究较少;高强高性能混凝土爆裂方面的研究多集中于爆裂规律和爆裂抑制措施,对爆裂机理和微观结构的研究较少。本文分别从3个方面指出了高强混凝土高温性能研究中存在的问题和今后的研究方向,为深入研究高强混凝土的高温性能提供参考。     

遗失物招领付费之研究

随着商品经济的发展,人们的道德素养并未上升到“圣人”的高度,拾而不还的行为在现实中逐渐成为一种较为普遍的现象。经中外对比研究,发现给予拾物人报酬请求权是解决该问题的一条有效途径,而“拾金不昧”的道德缺失也为遗失物招领付费制度提供了土壤。遗失物招领付费的做法在法理和实践中均有可行性,但在报酬比例的认定及该权利的排除适用上须谨慎对待。     

浅析董事违反忠实义务应承担的民事责任

在现代公司制度中,董事作为公司的管理机关和业务执行机关在代表公司对内和对外进行活动时对公司负忠实义务,此义务已成为特定情况下的法定义务.对于董事违反其应负忠实义务,应对公司承担相应的民事责任;如果给第三人造成损失的,还应承担以及第三人承担相应的赔偿责任.     

论国有环境资源损害的民事救济

国有环境资源作为国有资产的一种,当其受到污染破坏时,国家往往采取行政手段进行救济,民事救济手段被忽略。但是,行政手段不可能对国有环境资源提供完整的保护,民事救济是不可或缺的。为此,有必要深入探讨国有环境资源损害民事赔偿中的各种现实问题。     

汽车“二次碾压”的哲学反思

近年来,交通事故不断增多,其中最引人关注的是“二次碾压”。这一现象在社会上引起了激烈的讨论。从目前我国出现的“二次碾压”事故的现状入手,深入分析其产生的原因,提出解决问题的途径,以避免类似悲剧的重演。     

Assessing the effects of land use and land cover patterns on thermal conditions using landscape metrics in city of Indianapolis,United States

Direct applications of remote sensing thermal infrared (TIR) data in landscape ecological research are rare due to limitations in the sensors, calibration, and difficulty in interpretation. Currently there is a general lack of methodology for examining the relationship between land surface temperatures (LST) derived from TIR data and landscape patterns extracted from optical sensors. A separation of landscapes into values directly related to their scale and signature is a key step. In this study, a Landsat ETM+ image of Indianapolis, Unites States, acquired on June 22, 2000, was spectrally unmixed (using spectral mixture analysis, SMA) into fraction endmembers of green vegetation, soil, high albedo, and low albedo. Impervious surface was then computed from the high and low albedo images. A hybrid classification procedure was developed to classify the fraction images into seven land use and land cover (LULC) classes. Using the fractional images, the landscape composition and pattern were examined. Next, pixel-based LST measurements were correlated with the landscape fractional components to investigate LULC based relationships between LST and impervious surface and green vegetation fractions. An examination of the relationship between the LULC and LST maps with landscape metrics was finally conducted to deepen understanding of their interactions. Results indicate that SMA-derived fraction images were effective for quantifying the urban morphology and for providing reliable measurements of biophysical variables. LST was found to be positively correlated with impervious surface fraction but negatively correlated with green vegetation fraction. Each temperature zone was associated with a dominant LULC category. Further research should be directed to the theoretical and applied implications of describing such relationships between LULC patterns and urban thermal conditions.

Two preprocessing algorithms for climate time series

We propose two preprocessing algorithms suitable for climate time series. The first algorithm detects outliers based on an autoregressive cost update mechanism. The second one is based on the wavelet transform, a method from pattern recognition. In order to benchmark the algorithms'' performance we compare them to existing methods based on a synthetic data set. Eventually, for exemplary purposes, the proposed methods are applied to a data set of high-frequent temperature measurements from Novi Sad, Serbia. The results show that both methods together form a powerful tool for signal preprocessing: In case of solitary outliers the autoregressive cost update mechanism prevails, whereas the wavelet-based mechanism is the method of choice in the presence of multiple consecutive outliers.     

试论证券虚假陈述民事赔偿案的裁判标准——以大庆联谊案的审理进程为中心

大庆联谊案是我国证券虚假陈述民事赔偿案中首例经历了从立案到执行全部诉讼过程的案件。但是,在案件的审理过程中也暴露出我国证券虚假陈述民事赔偿案件裁判标准方面存在的缺乏现实可操作性和保护投资者权益力度不足等漏洞。以大庆联谊案从受到证监会处罚开始的诉讼进程为个案,以实证的方法对若干证券虚假陈述民事赔偿案件裁判标准的不足作初步探讨,显然对我国证券民事赔偿的立法与司法具有积极的意义。     

行政补偿立法思考

行政赔偿在行政领域起到了重要作用,目前获得行政赔偿的必要条件之一是行政主体违法行使职权,从行政相对人的角度考虑,在是否违法问题上大费周章没有必要,进一步从行政赔偿法是救济法的本质出发,优先考虑行政相对人的权益,将有关行政补偿内容纳入行政赔偿法律体系框架之中。     

论宋代军人的优抚保障政策及影响

两宋时期政府对军队的优抚与保障事业高度重视,军队优抚主要有残疾者优抚、阵亡优抚和平时官兵死亡优抚等;宋代军人的保障主要包括军人裁汰的安置、军人的疾病与受伤救治和出征军人家属的安置等.宋代军人的优抚保障政策不仅提高了军队战斗力,而且在中国历史上产生了深远影响.