红柱石微粉对高铝矾土熟料制品的补强作用

高铝矾土熟料制品是除粘土制品之外使用范围最广、用量最大的耐火材料,在各种工业窑炉中都有广泛应用。生产铝矾土熟料制品一般采用不同粒级的铝矾土熟料与塑性粘土为原料,用倒焰窑烧成时,烧成温度为１４３０～１４５０℃,保温４０ｈ;用隧道窑烧成时,烧成温度为１５５０～１５６０℃。其工艺关键是控制二次莫来石化产生的体积效应。当制品的Ａｌ２Ｏ３含量在７０％以下时,铝矾土熟料制品的高温性能取决于莫来石晶相与液相间的数量比例。Ａｌ２Ｏ３含量越高,制品中莫来石含量越高,玻璃相相应减少,制品的高温性能越好。在生产中提高…     

中国南方树皮煤的生油潜力

中国南方晚二叠世龙潭煤系中的树皮煤主要分布在江苏南部、浙江长兴、安徽广德、江西乐平、贵州六盘水、湖南对阳等地区。将树皮煤作为烃源岩研究,对中国南方油气资源的寻找、勘查和评价具有十分重要的意义。文中通过对树皮煤的形成条件。有机质类型、演化程度以及各种显微组分对煤成烃的贡献的分析,讨论树皮煤的生烃潜力。并根据龙潭煤系生烃潜力、油气显示和生储盖的组合特征,讨论了龙潭煤系的成藏前景。     

低浓度磷酸一酯的膜富集和气相色谱测定

磷酸一酯（ＲＯ）Ｐ（Ｏ）（ＯＨ）２是一种强极性的有机磷化合物。研究了水体中磷酸一（１－萘）酯的富集和上色谱分析,建立了一个简便快速、高灵敏度、实用的分析方法。富集是采用固相萃取方法,选用载有十八烷基硅烷的尼龙滤膜吸附,甲醇洗脱,回收率达７２％￣７％。它的气相色谱分析选用ＢＳＴＦＡ为衍生剂,反应条件为温度６５℃,反应时间３０ｍｉｎ,获得了满意的结果。方法的最低检测限为０。０６ｎｇ。     

断层氢气观测技术实验

采用ATG-6118H痕量氢在线自动分析仪,在朱夏-商丹断裂带南阳地区布设独山、马山口2个氢气观测台,研究设备取气深度、抽气时间设置长短对观测断层氢气浓度的影响,从而为利用痕量氢设备进行断层氢气观测提供参考依据。实验结果表明：①取气深度越浅,观测到的氢气浓度越高,日变化幅度越大;②集气管内氢气浓度偏低时,抽气时间设置略高于导气管路排空时间,氢气浓度明显变化,否则变化不明显。     

Enhancing seismic P phase arrival picking based on wavelet denoising and kurtosis picker

P phase arrival picking of weak signals is still challenging in seismology. A wavelet denoising is proposed to enhance seismic P phase arrival picking, and the kurtosis picker is applied on the wavelet-denoised signal to identify P phase arrival. It has been called the WD-K picker. The WD-K picker, which is different from those traditional wavelet-based pickers on the basis of a single wavelet component or certain main wavelet components, takes full advantage of the reconstruction of main detail wavelet components and the approximate wavelet component. The proposed WD-K picker considers more wavelet components and presents a better P phase arrival feature. The WD-K picker has been evaluated on 500 micro-seismic signals recorded in the Chinese Yongshaba mine. The comparison between the WD-K pickings and manual pickings shows the good picking accuracy of the WD-K picker. Furthermore, the WD-K picking performance has been compared with the main detail wavelet component combining-based kurtosis (WDC-K) picker, the single wavelet component-based kurtosis (SW-K) picker, and certain main wavelet component-based maximum kurtosis (MMW-K) picker. The comparison has demonstrated that the WD-K picker has better picking accuracy than the other three-wavelet and kurtosis-based pickers, thus showing the enhanced ability of wavelet denoising.     

基于ArcGIS点抽稀的河南省灾情速报骨干网建设

河南省地震局灾情速报员队伍经过多年建设,目前在册灾情速报员多达3万余人,数量位居全国前列,但也存在灾情速报员数量过多、管理不易等问题,为确保河南省地震灾情速报员队伍发挥作用,以河南省现有行政村点为基础,根据空间均匀分布的原则,以5×6 km为格网单元,对ArcGIS的三种不同的点抽稀方法进行对比分析,最终选择SubsetFeatures和SubPoints相结合的方法,提取出6000多个行政村点,依此为依据报送人员名单,以保证每个乡(镇、街道办事处)有3～5名灾情速报人员组成河南省骨干灾情速报员队伍,从而强化灾情速报工作管理。     

中国地－气系统短波吸收辐射分布特征

根据ＥＲＢＥ和ＩＳＣＣＰ资料讨论了公气系统短波吸收辐射及其年较差在全国的分布，分析了其与总云量、行星和地表反射卒以及地面吸收辐射的相互关系。发现在冬季地－气系统短波吸收辐射分布主要呈南高北低型，夏季分布形势为一不对称的大鞍形场，大致与行星反射率分布反向对应。公气短波吸收辐射与总云量呈负相关，高相关区在我国东部。各站地－气短波吸收辐射与地面吸收辐射的相关系数普遍高达０．９００以上。此一特，或为从气候上利用地－气吸收辐射反演地面吸收辐射提供初步可能。     

应力扰动对地震周期和地震矩影响的数值模拟

利用二维有限元数值模型,结合断层滑移弱化摩擦准则对断层滑动规律以及应力扰动对其影响进行了研究．数值计算结果表明,在均匀应力分布情况下, 平面断层滑动显示出典型的特征地震规律,断层面上的应力扰动对断层滑动规律产生影响,压应力增加明显延迟地震的发生时间,并增加地震释放的能量．应力扰动发生在地震破裂临界区时的影响比在震前滑移区时的影响显著．当发生在地震滑移区时,若应力扰动足够大,则压应力增大会造成地震发生时部分动力断层被暂时锁住,使得地震释放的能量变小,但可增加后续地震的能量; 而压应力减小则可导致地震规律产生更加复杂的变化,会即时触发地震．如果应力扰动发生在一个地震周期的早期,则触发的地震较小,但可导致随后的地震提前发生; 如果应力扰动发生在一个地震周期的后期,则会触发大地震．当应力扰动位于震前滑移区或破裂临界区时,小的扰动也可能产生类似的效果．应力扰动产生越晚,这种影响也越明显．应力扰动发生在破裂临界区的影响最明显．应力扰动的影响一般主要集中在应力发生扰动后的1—2个地震周期内．后续地震基本恢复无应力扰动时的特征地震规律．      

微量元素在湖积物、土壤的垂向分布与稻谷中的分配

报道了“江苏省国土生态地球化学调查”项目有关湖积物、土壤柱微量元素垂向分布及稻谷样元素分配研究的初步成果。通过对有关样品元素含量的分析对比,指出洪泽湖沉积柱元素垂向分布与其动荡的沉积环境关系密切、太湖局部沉积物在其目前20cm以上深度存在人为重金属污染,这二湖沉积物中其氮与总有机碳含量呈显著正相关;认为城市化可使当地土壤环境受重金属等污染的深度显著加大、城市土壤环境受人为活动的影响要显著高于农村;发现Mo易富集于稻米、重金属与营养元素易富集于稻皮、各元素在米-谷间的分配关系不确定。     

Self‐centering structural systems with combination of hysteretic and viscous energy dissipations

This paper presents an innovative set of high‐seismic‐resistant structural systems termed Advanced Flag‐Shaped (AFS) systems, where self‐centering elements are used with combinations of various alternative energy dissipation elements (hysteretic, viscous or visco‐elasto‐plastic) in series and/or in parallel. AFS systems is developed using the rationale of combining velocity‐dependent with displacement‐dependent energy dissipation for self‐centering systems, particularly to counteract near‐fault earthquakes. Non‐linear time‐history analyses (NLTHA) on a set of four single‐degree‐of‐freedom (SDOF) systems under a suite of 20 far‐field and 20 near‐fault ground motions are used to compare the seismic performance of AFS systems with the conventional systems. It is shown that AFS systems with a combination in parallel of hysteretic and viscous energy dissipations achieved greater performance in terms of the three performance indices. Furthermore, the use of friction slip in series of viscous energy dissipation is shown to limit the peak response acceleration and induced base‐shear. An extensive parametric analysis is carried out to investigate the influence of two design parameters, λ₁ and λ₂ on the response of SDOF AFS systems with initial periods ranging from 0.2 to 3.0 s and with various strength levels when subjected to far‐field and near‐fault earthquakes. For the design of self‐centering systems with combined hysteretic and viscous energy dissipation (AFS) systems, λ₁ is recommended to be in the range of 0.8–1.6 while λ₂ to be between 0.25 and 0.75 to ensure sufficient self‐centering and energy dissipation capacities, respectively. Copyright © 2010 John Wiley & Sons, Ltd.