基于中间件技术的GIS中并发控制

当前GIS大都采用了关系数据库作为空间数据的存储媒介，但关系数据库支持的并发控制并不完全适用于空间数据，提出了一个在GIS应用层运用中间件技术实现对二维空间数据并发控制的方法，在封锁粒度方面，采用了面向四叉树封锁，在封锁类型和封锁协议中，扩充了原有的锁，增加了强弱意向锁，使其更加协调各种不同级别的封负的并发控制，在封锁协议中，由于采用了中间件技术，只需利用一级封锁协议。     

SSRF直线加速器聚束器的研制

在SSRF(上海同步辐射装置)注入器的预制研究中，等梯度行波聚束器是一个重点。本文描述了SSRF直线加速器聚束器的设计、加工以及测试结果。     

A Software Tool for Automatically Verified Operations on Intervals and Probability Distributions

We describe a software tool for performing automatically verified arithmetic operations on independent operands when the operands are intervals, or probability distribution functions, or one operand is an interval and the other is a distribution. Intervals and distributions are expressed using the same technique, so the algorithms do not need to distinguish between intervals and distributions in their operation. The tool can calculate common arithmetic operations with guaranteed results (as well as confidence limits on a distribution if the distribution is empirically estimated from samples).A previous paper [1] discusses the concepts, algorithms, and related work. Here we emphasize a software tool that implements the algorithms, interacts with the user via a graphical user interface, and saves, retrieves, and prints the results of its calculations.     

基于GMM统计特性参数和SVM的话者确认

针对与文本无关的话者确认中大量训练样本数据的情况，本文提出了一种基于GMM统计特性参数和支持向量机的与文本无关的话者确认系统，以说话人的GMM统计特性参数作为特征参数训练建立目标话者的SVM模型，既有效地提取了话者特征信息，解决了大样本数据下的SVM训练问题，又结合了统计模型鲁棒性好和辨别模型分辨力好的优点，提高了确认系统的确认性能及鲁棒性。对微软麦克风语音数据库和NIST’01手机电话语音数据库的实验表明该方法的有效性。     

非单点模糊逻辑系统在非线性信道均衡中的应用

提出一种新的基于非单点模糊逻辑系统的自适应模糊滤波器的设计方法，研究和对比了自适应非单点模糊滤波器在非线性数字通信信道均衡中的应用，仿真结果表明，基于非单点模糊逻辑系统的信道均衡器能够有效地遏制信道的时变性和随机噪声干扰，可有效地解决数字信道的非线性畸变问题；从提高数字通信信道的传输正确率和传输效率来说，具有较强的适应能力。     

基于可编程逻辑器件的串行外设接口设计及实现

论述了串行外设接口(SPI)的原理,扩展了多从/多主模式、线与等新功能.用VHDL语言设计了全部源代码,在Max plusⅡ集成开发环境下对VHDL源代码进行编译、综合,并由可编程逻辑器件(CPLD)实现.使SPI接口应用的灵活性得到提高.     

一个几何概率问题的推广

本文利用初等方法将概率论中著名的几何概率问题-Buffon问题进行了较深入的探讨与推广。     

Isotope and hydrochemical study of seawater intrusion in Laizhou Bay, Shandong Province

Seawater intrusion on the northern coast of Laizhou City is featured by "three sources and three dimensions". Modern sea water, ancient saline water and brine contained both in the Quaternary aquifer and in the bedrock fissures or crevice have been identified as possible sources. The ratio of γSO4/γCI is used to distinguish the origin of the different types of saline water. The correlation between 3H and y SO4/γ Cl provides a quantitative differentiation on the origin of the saline water, which makes it possible to take counter protection measures in different areas affected by sea water intrusion.     

臭氧降解低浓度四溴双酚A及生物毒性控制

为考察臭氧氧化技术对水中低质量浓度四溴双酚A的降解和毒性控制效能,利用臭氧反应装置研究不同pH和臭氧投加量条件下四溴双酚A(质量浓度为0.15 mg/L)的降解效果,考察反应过程中水样的急、慢性毒性和遗传毒性的变化规律及控制效果,分析毒性变化内在原因,并提出可能性降解机理.结果表明,当溶液pH为7.0、臭氧投加量为0.12 mg/L,四溴双酚A可被完全降解.反应初期,水样的急、慢性毒性迅速升高,原因主要是产生了毒性更高的有机中间产物;随着反应的进行,有毒中间产物被深度降解,急、慢性毒性均得到有效控制,且随着臭氧投加量的增加毒性控制得更快、更显著.当臭氧投加量为0.12 mg/L时,急性毒性在反应20 min时即可被完全控制,慢性毒性在反应60 min也被控制至0.76 TU,反应后水样的急、慢性毒性均满足排放标准.反应过程中水样的致突变比均小于2.0,不具有基因水平的遗传毒性.降解机理分析表明,臭氧降解四溴双酚A主要包括脱溴、β位断裂、加成、去羟基化、甲基化等反应过程.     

Rapid and Sensitive Liquid Chromatography-Tandem Mass Spectrometry for Quantification of Glycyrrhetic Acid in Human Plasma

A simple, rapid and sensitive liquid chromatography-tandem mass spectrometry(LC-MS/MS) for the determination of glycyrrhetic acid in human plasma with ginsenoside Rh2 as internal standard was developed and validated. The plasma samples were prepared via liquid-liquid extraction with ethyl acetate. Chromatographic separation was accomplished on a Venusil MP-C18(50 mm×2.1 mm, 5μm i.d.) column at 25℃. The mobile phase consisted of acetonitrile/5 mmol·L-1 ammonium acetate(10:90, volume ratio) at a flow rate of 0.4 mL/min. Negative electrospray ionization was utilized as the ionization source. Glycyrrhetic acid and internal standard were determined via the mutiple reaction monitoring of precursor→production ion transitions at m/z 469→425, 409 and m/z 621→161,respectively. Each sample was chromatographed within 2.5 min. The lower limit of uantification was 0.50 ng/mL for 200 μL of plasma sample and the linear range was from 0.50 ng/mL to 800 ng/mL. The intra-and inter-day precisions were less than 8.76% in terms of relative standard deviation(RSD), and the accuracy was within a range of -3.25%-1.32% in terms of relative error(RE). The method was successfully applied to the pharmacokinetic studies of glycyrrhetic acid in healthy male Chinese volunteers after a single oral administration of 75 mg of glycyrrhizin.