Insights into correlation between satellite infrared information and fault activities

Tectonic activities are accompanied with material movement and energy transfer, which definitely change the state of thermal radiation on the ground. Thus it is possible to infer present-day tectonic activities based on variations of the thermal radiation state on the ground. The received satellite infrared information is, however, likely influenced by many kinds of factors. Therefore, the first problem that needs to be solved is to extract information on tectonic activities and eliminate effects of external (non-tectonic) factors. In this study, we firstly make a review of the current studies on this subject, and then present the technical approach and our research goal. Using the data of 20 years from the infrared band of the satellite of National Oceanic and Atmospheric Administration (NOAA) and the method we have developed, we investigate fault activities in western China. The results show that the areas with high residual values of land surface brightness temperature (LSBT), which is presumably related to faultings in space, accord usually with the locations of followed major earthquakes. The times of their value growing are also roughly consistent with the beginning of active periods of earthquakes. The low frequency component fields of the LSBT, acquired from wavelet analysis, exhibit well the spatial distributions of active faults. The “heat penetrability index” (HPI) related with enhancement of subsurface thermal information has been expressed well for the backgrounds of accelerated tectonic motions, and some correlations exist between HPI and the local faulting and seismicity. This study provides a new approach to study temporal-spatial evolution of recent activities of faults and their interactions.     

抗植物软腐病枯草芽孢杆菌的高密度发酵优化

为提高菌体产量,以益生菌枯草芽孢杆菌Asr作为发酵菌株,采用正交试验法和响应面法,对枯草芽孢杆菌Asr的发酵工艺进行了优化研究。结果表明,影响菌体产量最主要的3个因素为酵母浸粉、MgSO₄和CaCl₂;最佳发酵培养基配方为蔗糖20 g/L,蛋白胨10 g/L,酵母浸粉8.65 g/L,K₂HPO₄ 3.0 g/L,MgSO₄ 0.27 g/L,CaCl₂ 0.53 g/L;最佳培养条件为温度37 ℃、初始pH值7.0、接种量10%、搅拌转速250 r/min;应用优化配方及工艺,枯草芽孢杆菌Asr的最高产量达到7.30×10⁸ cfu/mL,菌体产量较优化前提高了3.95倍。研究结果可为后续菌体发酵罐的扩大培养提供技术支撑,对其他枯草芽孢杆菌发酵培养基的优化研究提供借鉴。     

吹填泥浆沉积模拟试验研究

为研究天津滨海新区吹填泥浆沉积特性,采用大型沉降柱进行模拟试验。结果表明:泥浆中土颗粒越细,泥水分界面下沉速度越慢;超静孔隙水压力随沉淀深度增大而增大;沉淀过程中阳离子由于交换减少,可加速泥浆沉淀;沉积后土颗粒沉积分选较明显。研究成果为进一步研究吹填软上工程性质及相关地基处理奠定了基础。     

关于在复多元正态分布中期望和协方差同时检验的无偏性问题

设A～CW_p(Q,n),z～CN_p(θ,Q)且相互独立,设原假设为(1)(?)设A_j～CW_p(Q_j,m_j),z_j～CN_p(θ_J,Q_j)(j=1,2,…,k),且相互独立.设原假设为(2)(?)(3)(?)本文证明了相应于备择假设A_i≠H_i,i=1,2,3,检验假设H_i的似然比检验是无偏性。     

直链烷基苯磺酸钠组成的HPLC研究

采用高效液相色谱法对直链烷基苯磺酸钠（ＬＡＳ）同系物的组成进行研究，由ＬＡＳ同系物的百分组成可计算出ＬＡＳ的平均碳峰及平均分子量．方法平均回收率为９８．２％，变异系数为２．６５％．     

多资源约束的MLLS的遗传分解混合算法

对带有多资源的生产批量计划构造了遗传算法和线性规划混合算法，用遗传算法产生可行调整模式，对应每一调整模式，则将原问题变换为一个线性规划模型进行求解。通过遗传算子进行迭代和进化，从而获得近优解，分析和计算结果表明了算法的有效性。     

高精度快速定向系统

本项研究采用多位置转台监控技术、解析调平和正交最小二乘参数估计方法，提高快速定向系统的测量精度。原理样机使用一只随机漂移为０．０２（°）／ｈ的动力调谐陀螺和一只精度为１×１０－５ｇ的石英挠性加速度计，在实验室条件下，仪器基座倾斜约１０’，１σ方位精度达到４０＂，同常规测量方法相比，系统精度提高了大约一个数量级。整个过程由微机控制，在５ｍｉｎ内完成。     

我校学术论文与科技期刊评定方法的初探

系统地分析了学术论文质量与高校科研实力的关系，以及期刊的级别与学术论文水平高低等关系，并结合我校学术论文水平评价的实践，论述了论文评价工作对提高学术风气与学术水平所具有的实际意义。     

谈山西省公路路基施工技术

就山西省的公路建设,介绍了公路的路基填土与压实,路基路面排水及路基防护,软土地基、黄土陷穴的处理。     

一定宽度无限长均匀带电薄板在空间任意位置处产生电场强度的表示

利用点电荷在空间产生电场强度的库仑定律和微积分的思想方法,表示出了一定宽度无限长均匀带电薄板在空间任意位置处产生电场强度的解析式.根据该解析式最后讨论了两种特殊位置的电场强度表示式.