Kinetic parameters of oscillating reaction of amino acid- BrO3^——Mn^2＋-H2SO4-acetone system

In the previous papers[1—3], the oscillating reactionusing amino acids as organic substrates was studied. Inorder to obtain information about the kinetic parameters ofoscillating reaction of amino acids in amino acid- BrO3 - ?Mn2 -H2SO4-acetone sy…     

建立高校学报质量评估的综合指标初探

本文在分析高校自然科学学报的特点后,提出了评估其质量高低的17条指标。应用这套指标,基本上可实现学报的定量评估。     

模糊聚类分析系统的研究与实现

本文提出了一个在关系数据库中实现模糊聚类的模型系统，阐述了该系统实现聚类的方法和过程，对于如何减少噪声数据的干扰、提高聚类分析的有效性和增强算法的鲁棒性等方面，进行了研究和探索。     

近视灵口服液中决明子的TLC鉴别

近视灵口服液由决明子等12味药材组成。试验确定了其主药决明子的薄层层析鉴别方法，对于含决明于复方中药制剂及相关食品的质量控制具有实用价值。     

通信协议分析的一种新方法

本文提出一种用于协议分析的新方法,它以本文提出的带有参数计数器的有限状态自动机为基础,对协议模型进行可达性分析。这种方法不仅解决了“状态爆炸问题”,并有利于实现自动验证。由所生成的可达树,可以构成马尔可夫链模型,并由此确定协议的性能。文中讨论了马尔可夫链模型的性质与建立过程,并进行了吸收分析。最后,给出了简单分组传输协议的例子,以说明方法的应用。     

计算机数据安全存储系统的实现

本文介绍了一种微机加密系统,并且提出了一种便于单个用户和多个用户管理的密钥产生方案与技术.该系统具有操作简便、加密速度快与保密性高的特点.     

阴离子淀粉—磷酸酯淀粉的研制

本文研究了制备淀粉磷酸酯的方法,对影响因素进行了探讨,确定了较佳的工艺参数,制得了性能良好的产品,在纸张生产中初步试用,获得了明显的效果。     

Picture encoding and retrieval： An event-related potentials study

A study-test paradigm was used to investigate the Dm (Differential memory) effect and the old/new effect of pictures. The participants were asked to judge whether the pictures were previously studied or not when they were presented with a series of pictures during the test phase. The event-related potentials (ERPs) were recorded during encoding and retrieval phases. The results showed that (1)during 400-700 ms of encoding, the remembered old pictures elicited more positive waveforms than the forgotten old pictures at frontal and central areas; (2) during 500-600 ms of retrieval, the correctly judged old pictures elicited more positive waveforms than the correctly judged new pictures at medial-midline in both hemispheres; (3) the duration of Dm effect was longer than that of old/new effect for picture. The present results suggest that the Dm effect of pictures is different from that of words and faces in spatial and temporal distributions. The neural mechanisms of picture encoding and picture retrieval are also different, which indicates that retrieval is not the simple recovery of encoding.     

Strontium isotopic signature of hydrothermal sedimentation from Early Cambrian barite deposits in east Guizhou,China

The ore genesis model for barite deposits in east Guizhou Province has been in dispute and the major debate focuses on whether they are product of the submarine hydrothermal sedimentation. This note presents new strontium isotope data from 19 samples of Dahebian and Yuping barite deposits, and their ^87Sr/^86Sr ratios are significantly lower than that of the coeval seawater. The ^87Sr/^86Sr ratios of 17 samples out of 19 samples rang from 0.708310 to 0.708967, indicating that they might be related to the mantel admixture. Two isotopic ratios in this study are higher than those of coeval seawater (0.7090), collected from late-stage barite mineral vein of interpenetrative strata and a barite nodule bearing hypidiomorphic granular pyrite, which indicates that they might be related to the continental admixture. The study provides Sr isotopic evidence not only for the submarine hydrothermal exhalative genesis of Dahebian and Yuping barite deposits, but also for distinguishing the barite mineralization of late stage.     

An ontology-based service matching strategy in grid environments

An efficicnt ontology based service searching scheme is put forward in this paper by introducing semantic information into grid systems. The ideas of ontology and OWL (Web ontology language) are applied to establish a uuiform abstract concept model and standardization for grid services. We propose a general framework of ontology-based service discovery sub-system, which includes ontology storage module, context based domain selection module and specific service matching module. Implementation policies are also presented in this paper.