Domain-Driven, Actionable Knowledge Discovery

Data mining increasingly faces complex challenges in the real-life world of business problems and needs. The gap between business expectations and R&D results in this area involves key aspects of the field, such as methodologies, targeted problems, pattern interestingness, and infrastructure support. Both researchers and practitioners are realizing the importance of domain knowledge to close this gap and develop actionable knowledge for real user needs.     

三级压力五个阶段压水试验方法的应用研究

采用三级压力五个阶段的压水试验方法，不但可判别压水试验成果的正误，而且可根据压水试验成果分析地层在不同压力下的渗透特性，尤其适用于帷幕灌浆的质量检查，本文根据故县帷幕灌浆检查工作，提出了一套保证压水试验精度的措施，包括对压力表，流量表精度的要求以及流量读数方法和稳定标准的要求，并根据压水试验结果对故县帷幕灌浆效果进行了初步评价，提出了三级压力五个阶段压水试验的适用范围。     

Novel Apriori-Based Multi-Label Learning Algorithm by Exploiting Coupled Label Relationship

It is a key challenge to exploit the label coupling relationship in multi-label classification (MLC) problems. Most previous work focused on label pairwise relations, in which generally only global statistical information is used to analyze the coupled label relationship. In this work, firstly Bayesian and hypothesis testing methods are applied to predict the label set size of testing samples within their k nearest neighbor samples, which combines global and local statistical information, and then apriori algorithm is used to mine the label coupling relationship among multiple labels rather than pairwise labels, which can exploit the label coupling relations more accurately and comprehensively. The experimental results on text, biology and audio datasets shown that, compared with the state-of-the-art algorithm, the proposed algorithm can obtain better performance on 5 common criteria.     

大学生勤工助学平台网站设计与实现

通过对高校勤工俭学学生的调查研究,设计出一种基于浏览器/服务器(B/S)模式的高校勤工助学网站。采用ASP作为开发工具,ACCESS作为后台数据库管理,建立一个为大学生提供勤工助学、招聘求职等信息的发布网站,主要包括兼职须知、发布招聘、求职中心、勤工风采、勤工通告中心等模块。学生可以网上申请勤工助学岗位、校内外单位可以在网上发布勤工助学招聘信息,方便了学生求职。     

Simulation of the ciliary apparatus of ciliated epithelial cells

The apparatus and functioning of the ciliary apparatus of ciliated epithelial cells and nasal mucosa is described. A model is suggested for the ciliary apparatus as a system of solid bodies with forces. This model and the results of computer modeling are mathematically described     

基于蒙特卡洛方法的触发器聚类布局算法

针对触发器聚类的布局问题,提出了一种基于蒙特卡洛方法的触发器聚类布局算法。该方法的核心思想为设计合理的评分函数,并通过蒙特卡洛方法模拟触发器聚类在版图上的随机游走过程,获取样本,再通过评分函数评价样本质量,逐步地在可行域中搜索最优解。实验结果表明,相较于现有的方法,该方法在总线长与时序性能两方面,分别得到平均约9%与17%的改善与提升。此外,该方法具有较强的健壮性,适用于复杂度较高或者版图利用率较高的设计,并能够快速收敛,以较小的时间代价完成优化。     

Geometrical theory of whispering-gallery modes

Using a quasi-classical approach, rather precise analytical approximations for the eigenfrequencies of whispering-gallery modes (WGMs) in convex axisymmetric bodies may be found. We use the eikonal method to analyze the limits of precision of quasi-classical approximation using, as a practical example, a spheroidal dielectric cavity. The series obtained for the calculation of eigenfrequencies is compared with the known series for a dielectric sphere, and with numerical calculations. We show how geometrical interpretation allows expansion of the method on arbitrarily-shaped axisymmetric bodies.     

A hardware software co-design method for control transfer optimization in binary translation system

针对控制转移开销是影响二进制翻译和优化系统性能的主要因素,进行了提高二进制翻译优化系统性能的研究,提出并实现了硬件设计开销较小的基于硬件内容可寻址存储器(CAM)机制的软硬件协同设计方法.通过实验充分分析了CAM大小、软件替换算法对CAM命中率的影响,并根据分析提出了一种新颖的、软硬件结合的降低CAM访问缺失率的方法.该方法相对于传统的软件和硬件优化方法,硬件实现及验证复杂度低且优化效果明显.实验结果表明该方法使得二进制翻译系统整体性能提高了13.44％.该方法已实际应用于龙芯x86二进制翻译系统中.     

NUMA结构的高效实时稳定的垃圾回收算法

针对非一致性内存访问架构(NUMA)在垃圾回收(GC)过程中存在大量的远程内存读写导致GC性能降低的问题,对GC过程的各个阶段进行分析与研究,提出了一种基于NUMA结构的高效实时稳定的GC算法。该算法首先基于NUMA结构改进传统分代GC机制的堆空间布局,然后通过控制GC过程中扫描活跃对象阶段的初始根对象选取、动态负载均衡阶段截取任务队列的选取以及复制活跃对象阶段对象复制位置的选取,大大减少GC过程中的远程访问次数。这种改进的GC机制对所有NUMA结构具有通用性。以Godson-3处理器的NUMA平台为例进行的实验结果显示,优化的GC机制极大地缩短了GC的时间,而且提高了应用程序的性能以及稳定性。在SPECjvm2008测试中,GC时间平均缩短了14.6%(GC总时间缩短4.1%~41.58%),应用程序的性能平均提升了4.68%(最高提升17.8%),应用程序的性能稳定性提升了76.2%。     

基于MOOC的混合式教学模式初探——以华理校园慕课平台建设为例

本文以华理校园慕课平台建设为例,探索一种基于MOOC的混合式教学模式,以期一方面通过教学模式的改革创新,构建适合当前教育教学现状的创新模式,为学生提供多元化的学习途径;另一方面通过课程教学新模式的尝试,不断推进教育信息化建设和课程教学的深入改革与创新。