基于条件误分类的决策树剪枝算法

在建立决策树分类模型时,剪枝的方法直接影响分类器的分类效果。通过研究基于误差率的剪枝算法,引入条件误差的概念,改进剪枝标准的评估方法,针对决策树的模型进行优化,提出条件误差剪枝方法,并将其应用于C4.5算法中。实验结果表明,条件误差剪枝方法有效地解决剪枝不充分和过剪枝的情况,在一定程度上提高了准确率。     

基于克隆多尺度协同开采的离散微粒群算法

提出一种克隆多尺度协同开采的离散微粒群算法.多尺度变异概率根据粒子适应值大小进行动态调节,在算法初期通过大尺度概率变异增加算法多样性,后期通过逐渐减小的小尺度变异提高算法在最优解附近的局部精确解搜索性能,对当前最优解进行克隆选择,可进一步增强算法逃出局部极小解的能力以及所求解的精度.将算法应用于5个benchmark函数优化问题并与其他算法比较,结果表明该算法不仅能增强全局解搜索性能,同时最优解的精度也有所提高.     

投稿与审稿系统的设计与实现

深入分析了在线投稿、审稿系统的功能和关键技术,设计了基于B／S结构的在线投稿、审稿系统方案,并利用MVC模式的Stmts2＋Spring＋Jpa构架思想,采用Java编程语言、JSP页面技术。MYSQL数据库技术,实现了在线投稿、审稿系统,最后对系统的性能进行了测试和分析。

Abstract：

Intensively study and analyze the function and key technoligoes. The online contribution and review system based on the structure of B/S was designed and implemented with the MVC model of Struts2＋Spring＋Jpa ,the technology of Java, JSP and Mysql.Finally,t     

三星SCX-4824HN:让设计点燃办公激情

在一家进出口公司工作的李小姐的眼中,办公室配置的打印设备永远都是一副冷冰冰的面孔,拒人于千里之外.事实上,与季小姐有同感的商务办公人士并不少见.打印机生产厂商一味重视对打印输出技术的研发,无视用户对外观设计的需求是造成这种状况的主要原因.     

Multi-digit maximum voluntary torque production on a circular object

Individual digit-tip forces and moments during torque production on a mechanically fixed circular object were studied. During the experiments, subjects positioned each digit on a 6-dimensional force/moment sensor attached to a circular handle and produced a maximum voluntary torque on the handle. The torque direction and the orientation of the torque axis were varied. From this study, it is concluded that: (1) the maximum torque in the closing (clockwise) direction was larger than in the opening (counter clockwise) direction; (2) the thumb and little finger had the largest and the smallest share of both total normal force and total moment, respectively; (3) the sharing of total moment between individual digits was not affected by the orientation of the torque axis or by the torque direction, while the sharing of total normal force between the individual digit varied with torque direction; (4) the normal force safety margins were largest and smallest in the thumb and little finger, respectively.     

Biomechanical evaluation of nursing tasks in a hospital setting

A field study was conducted to investigate spinal kinematics and loading in the nursing profession using objective and subjective measurements of selected nursing tasks observed in a hospital setting. Spinal loading was estimated using trunk motion dynamics measured by the lumbar motion monitor (LMM) and lower back compressive and shear forces were estimated using the three-dimensional (3D) Static Strength Prediction Program. Subjective measures included the rate of perceived physical effort and the perceived risk of low back pain. A multiple logistic regression model, reported in the literature for predicting low back injury based on defined risk groups, was tested. The study results concluded that the major risk factors for low back injury in nurses were the weight of patients handled, trunk moment, and trunk axial rotation. The activities that required long time exposure to awkward postures were perceived by nurses as a high physical effort. This study also concluded that self-reported perceived exertion could be used as a tool to identify nursing activities with a high risk of low-back injury.     

CQI and technology: partnership drives improvement

CQI plus technology equals increased financial success, according to Parkview Episcopal Medical Center. For this Pueblo, Colo., community hospital, the results of this equation are impressive--time saved, a motivated workforce and last but not least, more revenue.     

Matching three-dimensional objects using silhouettes

A method for matching three-dimensional objects against a library of models from an observed sequence of silhouettes is presented in this correspondence. Based upon the observed silhouettes, the three-dimensional structure of the object is constructed and refined. The principal moments and three primary silhouettes are computed for the constructed three-dimensional objects to represent the aggregate and detailed structure parameters. The adaptive matching technique requires that sufficient silhouettes be added to modify the structure of the unknown object until consistent and steady matching results are obtained. The library for matching is based on three primary silhouettes of the model objects. Experiments conducted show a fast convergence to a consistent result may be achieved provided that a reasonable choice of silhouettes is made.