大别山超高压变质带p-T-t轨迹数值模拟

模拟设计了拆沉底辟模型、叠瓦俯冲纯剪切伸展模型二组共９种模型。拆沉底辟模型,第一阶段ｐ Ｔ ｔ轨迹在地幔热影响下都为降压增温过程,第二阶段ｐ Ｔ ｔ轨迹明显不同,快速折返速率下为近等温降压,从深部抬升到岩石圈底为显著的降压升温、近等温降压过程,从岩石圈底部经过地壳出露地表为降温降压过程。慢速抬升速率下,为降温降压。模拟比较了底辟上升俯冲板片形态不变与板片形态改变模型,陆壳与陆壳俯冲碰撞和陆壳与洋壳俯冲碰撞,在岩石圈深度范围内ｐ Ｔ ｔ轨迹形态基本相似,首先是等温降压然后降温降压。叠瓦俯冲纯剪切伸展模型,快速伸展速率下ｐ Ｔ ｔ轨迹表现出３个不同的阶段：从降温降压到近等温降压,然后再降温降压。慢速伸展速率下ｐ Ｔ ｔ轨迹为开阔弧形形态,首先为降压增温,然后为降压降温。     

韩城矿区煤层气开发潜力评价

韩城矿区煤层气工作是伴随着我国煤层气研究。开发同步进行的，1995年在该区施工的韩试一井经过多年排采试验，获得了大量基础资料，通过分析这些资料认为，韩城矿区煤层气的开发潜力巨大，是陕西省煤层气开发利用的重点区域。     

云南省MS≥6.0地震序列的基本特征

选取了云南省 196 5— 2 0 0 0年的 19个 MS≥ 6 .0地震序列 ,利用震后 30天的余震资料 ,分析了各地震序列的震级结构。运用古登堡—里克特关系式及大森—宇津公式分别计算了各余震序列的 b值和 p值。结果表明 ,云南省每一次 7级或 6级地震发生后 ,均有大量余震发生 ,但余震活动的强度和频度在各序列之间存在较大差异 ,其原因可能与震源区的介质、构造差异有关。计算得到的 b值为0 .38— 0 .70 ,b值的大小体现出了一定的区域特征 ;p值大多接近或大于 1.0 ,但看不出区域特征。在主震—余震型和双主震—余震型地震序列之间 ,b值、p值看不出显著差异     

一类非线性积分方程在Lp(p>0)中的最小解

获得了一类非线性积分方程在Ｌｐ中的最小解,方法上不同于目前的有关文献。     

《测量学》教材内容的改革与探索

《测量学》教材内容滞后于测绘技术的发展已成为提高《测量学》课程教学质量的瓶颈。笔者通过自主研发新技术测量方法与便携计算程序,以随书赠送大容量DVD光盘为载体作辅助手段,将测、算、绘新技术内容引入《测量学》教材,以每年一版的力度编写与修订多媒体立体化《测量学》教材,探索出一条用测量新技术内容改造传统教学内容的新路。     

The interaction between organic phosphate ester and p53: An integrated experimental and in silico approach

Concerns have been raised in regards to the environmental impact of the more used organophosphate flame retardants (OPFRs). In this study, to better understand the relationship between molecular structural features of OPFRs and binding affinity for the tumor suppressor p53, an integrated experimental and in silico approach was used. From docking analysis, hydrogen bonding and hydrophobic interactions were found to be the dominant interactions, which implied the binding affinities of the compounds. The binding constants of 5 OPFRs were determined by surface plasmon resonance technology (SPR). Based on the observed interactions, appropriate molecular structural parameters were adopted to develop a quantitative structure-activity relationship (QSAR) model. The developed QSAR model had good robustness, predictive ability and mechanism interpretability. The interactions between the OPFRs and p53 (E_binding) and the partition ability of the OPFRs into the bio-phase are main factors governing the binding affinities.     

Estimation of the Source Time Function Based on Blind Deconvolution with Gaussian Mixtures

It is demonstrated that the blind deconvolution method is fully capable of recovering the unknown Greens function and of estimating the source time functions from observed seismic data of small earthquakes. Based on the assumption of the Gaussian-mixture model of the Greens function, the newly-formulated algorithm is evaluated using synthetic seismic data along with those of the May 8, 1996 Mexico earthquake (M_c = 4.6). Since the estimated results closely match the theoretical input very well, the method is then employed to analyze the source time functions of the July 7, 1995 Pu-Li, Taiwan earthquake (M_L = 5.3). The stations triggered by this event were azimuthally well covered. Using the estimated source time functions, information pertaining to the directivity effect is readily obtained, and the actual fault plane of this event is identified, thus clearly indicating that this method provides a most efficient way to estimate the source time function of a small earthquake.Acknowledgment The authors would like to express their thanks to two anonymous reviewers for their valuable suggestions and Dr. I. Santamarias courteous assistance. They also appreciate the efforts of Drs. H.C. Chiu and R.J. Rau, who provided the seismic data and the fault plane solutions. The National Science Council, Taiwan, has supported this research (NSC 91-2119-M-194-011).     

近代四川气候特征初步分析及展望

本文分析了近代四川气温、旱涝变化的基本特征,并对未来变化趋势进行展望。     

fx-4800P型计算器钻孔内地质点定位程序

文章探讨了用CASIO fx-4800P型可编程计算器根据钻孔弯曲度测量数据计算钻孔在任意标高（中段）位置和孔内过矿点、构造点等任意点的三维坐标的应用程序．在程序中设置了“程序语言”以避免运算中出现的失误．并介绍了程序的操作过程。