几个反应参数对SiO2纳米粒子最终粒径影响的探讨

研究了在低TEOS浓度和高TEOS浓度下, TEOS浓度、NH3浓度、H2O浓度对SiO2纳米粒子最终粒径的影响.发现,在低TEOS浓度下制备的粒子,单分散性较好,粒径偏大;在高TEOS浓度下制备的粒子,粒径较小,属于纳米级粒子.另外,在低TEOS浓度和高TEOS浓度下,NH3浓度、H2O浓度对最终粒径的影响有较大差异.     

函数优化的模糊粒子群算法

在传统粒子群算法的基础上运用模糊规则表加入了新的扰动因子,提出了一种新的算法--模糊粒子群算法。算法结合了模糊控制器中输入输出的模糊化处理和粒子群寻优的特点,为实际问题提供了新的解决手段。将模糊粒子群算法应用于函数优化的问题上,通过多组实例数据进行测试,验证表明了本算法具有良好的有效性和鲁棒性。     

An approach to web-based Personal Health Records filtering using fuzzy prototypes and data quality criteria

Nowadays, new ways of managing and accessing to health-care information are continuously appearing. Web-based Personal Health Records (web PHRs) have the potential to make data about health-care available to clinicians, researchers and students in different medical contexts and applications. Therefore, the amount of web PHRs accessible through Internet has grown enormously and as a result health-care professionals are currently burdened with more and more data. It’s probable that these data, unfortunately, have not always the adequate levels of quality, making that their work cannot always be as successful as expected. As a way of alleviating this fact, the present work is focused on improving the document filtering results in the context of web PHRs management. To achieve this goal, a new kind of document filtering model is proposed. This model is based on fuzzy prototypes which are defined by means of conceptual prototypes. These prototypes are obtained by using a data quality analysis of documents. This analysis guarantees that filtered information will be relevant enough for the information user. The complete model provides an efficient strategy of document filtering that can be very useful when it is necessary to deal with a constant flow of new information.     

A collaborative filtering similarity measure based on singularities

Recommender systems play an important role in reducing the negative impact of information overload on those websites where users have the possibility of voting for their preferences on items. The most normal technique for dealing with the recommendation mechanism is to use collaborative filtering, in which it is essential to discover the most similar users to whom you desire to make recommendations. The hypothesis of this paper is that the results obtained by applying traditional similarities measures can be improved by taking contextual information, drawn from the entire body of users, and using it to calculate the singularity which exists, for each item, in the votes cast by each pair of users that you wish to compare. As such, the greater the measure of singularity result between the votes cast by two given users, the greater the impact this will have on the similarity. The results, tested on the Movielens, Netflix and FilmAffinity databases, corroborate the excellent behaviour of the singularity measure proposed.     

改进的粒子滤波的视频图像目标跟踪技术

主要研究了视频图像目标跟踪准确性问题。在基于核的颜色特征统计描述及以此建立视觉目标观测概率方法的基础上,提出了一种改进的粒子滤波视频图像目标跟踪算法。首先,本文给出了基于标准粒子滤波的单特征、单目标跟踪算法,然后针对加权样本参数的选择不同,提出改进思路,最后通过与基于均值移位视觉目标跟踪算法的实验结果对比。提出的改进的粒子滤波跟踪算法在稳健性方面有显著地提高,而且若适当选择视觉跟踪参数,在实时性方面能得到有效地保证。     

量子粒子群算法优化网络拓扑结构技术

针对传统的量子粒子算法不能满足日新月异变化的网络拓扑结构,提出了一种从领域拓扑结构角度进行改进的PSO算法。仿真实验表明,PSO-DSF算法使得粒子在保证收敛速度的同时能够提高它避免陷入局部极值问题,能够高效地优化整个网络的拓扑结构。     

混沌粒子群算法在数据库查询优化中的应用

查询计划的一棵左深树看作是一个粒子,对于左深树上的连接操作后序遍历生成一个编码,对粒子群进行速度和位置更新操作,并通过引混沌搜索机制,对粒子进行混沌扰动,保证粒子群个体的多样性,最后通过粒子间的信息共享与传递找到最优数据库查询优化方案。     

带电粒子在电场中运动的分析方法

运用运动学、动力学、功能关系、电磁学、矢量的分解与合成等知识,探讨了带电粒子在电场中运动的分析方法.     

提高8号煤矿许用毫秒雷管可燃气安全度方法探析

通过大量的试验和理论分析,找出了影响8号煤矿许用毫秒延期电雷管可燃气安全度的原因,并制定了提高可燃气安全的措施。