渐近非扩张映象具误差的迭代收敛问题

研究了Banach空间中渐近非扩张型映象不动点的迭代逼近问题，所得结果改进了相关文献的最新成果．     

百色盆地百49块百岗组三段高分辨率层序地层学分析

以高分辨率层序地层学理论为指导，通过地表露头、岩芯、测井资料的综合研究，并结合地震剖面资料，分析了百色盆地塘寨油田百49块古近系百岗组三段不同级别的层序界面和湖泛面特征及识别标志，划分出1个长期、3个中期、14个短期基准面旋回层序。在此基础上，详细讨论了各级次基准面旋回层序的垂向序列、岩性岩相组合、结构类型及更加样式等特征，并探讨了高分辨率层序地层学的研究成果在区块油气开发工程中的应用前景。     

BP网络应用于黄河水质的预测研究

利用黄河兰州段水质指标浓度时间序列作为学习样本，选取了DO、COD、氨氮、重金属离子等l0项指标作为输出参数，运用人工神经网络BP模型中的Levenberg—Marguardt优化算法对学习样本优化建模，将优化好的网络的预测结果与实测结果进行了比较，表明BP网络可以很好地用于黄河水质指标值及水质类别的预测。     

化学修饰电极及其在环境分析中的应用

化学修饰电极(CMEs)是当前电化学、电分析化学中十分活跃的研究领域,其应用范围十分广泛。本文评述了化学修饰电极的研究状况及其在环境分析中的应用,并展望了化学修饰电极的发展前景。     

Progress in the study of tectophysicochemistry

Tectophysicochemistry is a research area that deals with the interrelations between physical and chemical changes of crustal materials caused by tectonism. A given tectonic force may be resolved into two parts: homogeneous stress and differential stress. Homogeneous stress refers to isotopic pressure, which is superimposed on the original pressure and affects the equilibrium of various chemical reactions. It is also a factor that influences petrogenesis,metallogenesis and metamorphism. Differential stress is commonly produced when external forces act on a given solid body. It may cause deformation of crustal materials and generate various kinds of structural features. Tectophysicochemistry pays special attention to pressure, temperature and other physicochemical conditions produced or induced by tectonism and studies the influences of additional tectonic parameters on various chemical equilibria, so it gradually develops into an independent area of science.     

大学预科化学课程教学探讨

本针对大学预科班学生的特点，从大学预科化学课程的基本目的和要求出发，讨论大学预科化学课程教学中应注意的问题．     

关于生物高分子元素活性中心分布规律的第四统计力学理论标度的研究(Ⅱ)——心血管中药的生命动力元素按原子序数分布的规律与群子参数间关系

首次采用第四统计力学群子理论对心血管中药中生命动力元素的分布规律进行了系统的研究 ,结果表明心血管中药的生命动力元素按原子序数分布呈现出如下四种分布规律，即不同中药有轻度元素分布、较轻度元素分布、较重度元素分布和重度元素分布 ,并且每一种分布根据R₂ /R₁的值又可分为两个分支。本文还首次阐述了群子统计参数R₁、R₂ 、R₂ /R₁及R₁·R₂ 在中药生命动力元素分布中的物理内涵。这些研究为进一步定量地研究中药的性味和药效之间的关系提供了必要的依据。     

Land vehicle positioning using GPS and dead reckoning

To ensure reliable land vehicle positioning, the Global Positioning System (GPS) is one of the best techniques commonly used in present-day positioning systems. However, GPS signals are not available if line of sight with the satellites is lost. In this respect, the addition of the Dead Reckoning (DR) method to complement the GPS unit would enhance the reliability of land vehicle positioning system. For implementing the DR method, the magnetic sensor and accelerometer are used for obtaining heading and velocity or distance information. Calibration of two sensors' dynamic model and DR algorithm are also introduced in this paper. The test result utilizing the GPS and DR methods is analyzed in this paper. It utilize spositioning information from GPS receiver when GPSsignal is available, otherwise DR is started to compensate GPS outage with the GPS output as the original point. The results showed that the error in east and north produced by the DR algorithm for a short time interval can be limitedwithin an acceptable range.     

In-vehicle GPS/DR navigation system development and test results in Singapore

This paper introduces the in-car navigation system prototype development and test results under the context of Singapore. In the system, integrated GPS/DR is used for continuous vehicle positioning. A digital road network map database is built for the whole Singapore. The database is designed to support map matching, route determination, and route guidance functions. The prototype system demonstrates GPS positioning of the vehicle in real-time, tracking the vehicle onto a digital map with fix updates every one or two seconds.With the map matched vehicle location on the map, voice and/or text guidance is provide to the driver. The vehicle position can also be transferred to control centre through communication data link for the purpose of fleet management.     

A carbon- and oxygen-isotope record of recent environ- mental change from Qinghai Lake, NE Tibetan Plateau

An understanding of natural climatic variability is essential for evaluating anthropogenic impacts on recent and future climate[1—3]. Due to the lack of lengthy instrumental records, such an understanding must be gained from natural archives of climate change. Palaeolimnological indicators of past lake levels may provide a sensitive record of changes in effective precipitation in closed basins. This approach is particularly relevant on the Tibetan Plateau, where instrumental records are very…