Interior penalty bilinear IFE discontinuous Galerkin methods for elliptic equations with discontinuous coefficient

<正> This paper applies bilinear immersed finite elements (IFEs) in the interior penalty discontinuousGalerkin (DG) methods for solving a second order elliptic equation with discontinuous coefficient.A discontinuous bilinear IFE space is constructed and applied to both the symmetric and nonsymmetricinterior penalty DG formulations.The new methods can solve an interface problem on a Cartesianmesh independent of the interface with local refinement at any locations needed even if the interfacehas a nontrivial geometry.Numerical examples are provided to show features of these methods.     

用电磁场模拟质点在重力场中的最速降线

研究了带电质点在重力作用下于均匀磁场中所进行的无初速运动的轨迹.     

医疗市场诚信机制分析

医疗消费中存在严重的货币信息弱势问题,它是医疗市场诚信缺失的一个重要机制,会造成一系列危害,其原因在于医疗的高度专业性,医疗消费的刚性需求和低需求弹性,信息差异和市场经济中意识形态的淡化。在经济学视野里,医患利益的差别是患者货币信息弱势产生的根源,若将医方的专业知识、信息优势、机会主义和病人的心理弱势相融合,就构成医疗消费中的货币信息弱势的充分必要条件;医疗消费中的问题反映出市场经济交易规则的溢出效应。     

试论元代杭州的旅游业

宋元更迭对杭州的冲击较小,杭州旅游业得到了继续发展,主要表现在三个方面,即元代杭州的景区建设和维护继续进行,来自全国各地的游客众多,海外游客进一步增加.     

武器装备采办分层次竞争机制研究

武器装备的供给应着力于构建"寡头主导、大中小企业分层竞争"的产业组织结构。采办方应设计最优的主承包招标机制,以促进各寡头企业之间的投标竞争,从而实现最佳采办效益。武器装备采办的分层次竞争不完全取决于采办方的竞争意愿,其还要受到武器装备供给企业的产权安排、军民融合程度、纵向一体化及采办代理人制度等多种因素的影响。     

侦辩交易的提出及若干形态分析

侦辩交易是不同于诉辨交易的一种形态，在国内外侦查实践中均存在，如我国的坦白从宽，美国的刑事免责以及污点证人制度。侦辩交易的主体虽然是侦查机关和犯罪嫌疑人及其辩护人，但侦查机关主要是通过向公诉机关和审判机关提出建议来践行交易。     

Synthesis of a novel multi-SO3H functionalized strong Brønsted acidic ionic liquid and its catalytic activities for acetalization

The novel multi-SO3H functionalized strong Bronsted acidic ionic liquid has been prepared and its catalytic activities were investigated through the acetalization. The results showed that the novel catalyst was very efficient for the reaction with the average yield over 90% under solvent-free condition at room temperature. Operational simplicity, without need of any solvent, a small amount of usage, low cost of the catalyst used, high yields, applicability to large-scale reactions and reusability are the key features of this methodology. The novel catalyst also has great potential for the green process.     

乌鲁木齐市中学生体育课上心境状态的比较与分析

文章以新疆乌鲁木齐市初高中生为研究对象,运用文献法、调查法、观察法、问卷法对体育课的心境状态进行研究。并得出以下结论:1.中学生在体育课上心境状态的变化在存在年级差异,高中生在紧张、愤怒、疲劳、抑郁、慌乱几个方面都高于初中生,而在精力、与自我有关情绪都低于初中生。2.中学生在体育课上心境状态的变化存在性别差异,在紧张、愤怒、疲劳、抑郁、慌乱、精力、与自我有关情绪这几个方面男生得分都高于女生。     

Community-Based User Domain Model Collaborative Recommendation Algorithm

Collaborative Filtering (CF) is a commonly used technique in recommendation systems. It can promote items of interest to a target user from a large selection of available items. It is divided into two broad classes: memory-based algorithms and model-based algorithms. The latter requires some time to build a model but recommends online items quickly, while the former is time-consuming but does not require pre-building time. Considering the shortcomings of the two types of algorithms, we propose a novel Community-based User domain Collaborative Recommendation Algorithm (CUCRA). The idea comes from the fact that recommendations are usually made by users with similar preferences. The first step is to build a user-user social network based on users’ preference data. The second step is to find communities with similar user preferences using a community detective algorithm. Finally, items are recommended to users by applying collaborative filtering on communities. Because we recommend items to users in communities instead of to an entire social network, the method has perfect online performance. Applying this method to a collaborative tagging system, experimental results show that the recommendation accuracy of CUCRA is relatively good, and the online time-complexity reduces to O.n/.     

社区心理护理体会

随着社区卫生服务的广泛开展，社区护理工作日益显示出其重要性。在整体护理中，心理护理的作用是十分重要的。现将笔者的社区心理护理中的体会总结如下。