The Dark Side of Relational Pursuit: From Attraction to Obsession and Stalking,.

Review declaring pleasant surprise with this relatively short book on stalking. It contains 164 pages of text, and provides a thorough context for understanding and treating stalking behavior, including a focus on both victim and perpetrator. The book is divided into five chapters. The first of these defines the nature of stalking behavior. Stalking is defined as harmful conduct, which involves unwanted communication and repeated unwanted intrusion by one individual upon another. The review notes that stalking behavior has three defining characteristics--(a) relentless and persistent contact, which is (b) unwanted and (c) adverse to the recipient. It is further observed that there is no single motive for stalking, nor any specific psychological profile for the personality of stalkers. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A study on a generalized parametric interpolator with real-time jerk-limited acceleration

The impossibility of exact arc length computation for ‘standard’ parametric curves such as Bézier/B-spline curves makes it difficult to generate a feedrate profile with desired accelerations in real-time. This paper presents a new recursive trajectory generation method that estimates an admissible path increment and determines the initiation of the final deceleration stage according to the distance left to travel estimated at every sampling time, resulting in exact feedrate trajectory generation through jerk-limited acceleration profiles for the parametric curves. The proposed approach allows the feedrate profile to be dynamically adjusted according to geometrical path constraints for the curved path. The simulation result has been also provided to illustrate the generation of smooth feedrate profile encompassing a sequence of mixed NC blocks including traditional linear and circular blocks.     

摆线轮齿形的组合修正方式及其优化设计

针对齿形已经确定的摆线轮,在修正方式及修正量未知的情况下,利用改进的复合形法对摆线轮齿形修正方式及修正量进行了优化分析．同时,采用工艺过程简单的“等距＋ 移距” 修正方式代替工艺过程较复杂的转角修正方式,使用该方法计算等距和移距修正量速度快,与传统的计算方法相比较,工作效率明显提高．计算结果表明：在摆线轮齿形的各种修正方式中,“正等距＋ 负移距”修正方式是较理想的摆线轮齿形修正方式．这种修正方式具有理想齿形,加工工艺简单,在设计与制造中有一定的推广使用价值     

Mathematical Simulation of Flow Field for Molten Steel in an 80–ton Single Snorkel Vacuum Refining Furnace

The three–dimensional flow field of molten steel in an 80–ton single snorkel vacuum refining furnace has been mathematically simulated to attain the optimal configuration and operation parameters, such as the bottom blowing Ar flow rate, the eccentric position of bottom blowing Ar port at ladle bottom, the single snorkel inner diameter, and the single snorkel immersion depth into molten steel. The mathematical simulation results show that a stable flow field of molten steel can be achieved in 70–second; meanwhile, the maximal circulation intensity of molten steel in the 80–ton single snorkel vacuum refining furnace can be found on a cross–section with y as 0 mm based on the middle of ladle bottom as circular point of the Cartesian space coordinate under the condition of injecting Ar gas on x coordinate considering the asymmetry of flow field for molten steel in the single snorkel vacuum refining furnace. The recommended parameters of the 80–ton single snorkel vacuum refining furnace with ideal circulation intensity as 970.1 kg/s are the bottom blowing Ar flow rate as 450–500 Nl/min, the eccentric position of bottom blowing Ar port as 250 mm, the single snorkel inner diameter as 1000 mm, and the single snorkel immersion depth as 500 mm.     

6063铝合金挤压型材质量影响因素及解决方法

挤压铸锭的质量对铝型材的质量有着举足轻重的影响，高质量的挤压铸锭是获得高质量铝型材的基础。本文分别从铝型材的化学元素成分控制、熔体质量、铸造的工艺参数、铸锭的均匀化处理等方面探讨了提高6063铝合金挤压铸锭质量的技术途径。     

用~(14)N(d,α_1)~(12)C核反应研究注入氮在纯铁和GCr15钢中的深度分布

本文描述了利用~(14)N(d,a_1)~(12)C核反应测量固体样品表面层内氮原子含量及深度分布的方法。在Si_3N_4标准样品中,所得到的表面处的深度分辨为48nm。利用该分析手段,研究了在不同注入温度条件下,氮离子注入纯铁和GCr15钢的保留量及深度分布的变化情况。     

计及数据不平衡的RUSBoost-LightGBM 短期负荷预测方法

随着人工智能技术的发展,负荷预测的准确度显著提高,但仍有一些负荷曲线预测精度较低。造成这种现象的原因 在于训练集中这类负荷曲线属于少数类,导致数据不平衡,模型无法充分学习,从而影响了预测的精度。为解决电力负荷数 据不平衡问题导致的预测精度降低的问题,提出了一种先分类后预测的解决方法。通过改进的K-Mediods 方法把具有高相 似性的历史负荷曲线进行聚类,并构造分类标签与电力负荷的特征集;然后根据预测时间的特征进行分类,通过RUSBoost 算 法很好的优化了分类过程中数据不平衡问题;最后在每类中使用LightGBM算法进行负荷预测。在公开数据集上的实验表 明,所提出方法对少数类负荷的预测效果显著,其平均绝对百分比误差(MAPE) 为2.95%,均方根误差(RMSE) 为 175.71 MW;对于常规负荷的预测,MAPE为3 .52%,RMSE为195.84 MW,相对其他方法也具有较好的预测效果。     

热轧带钢轧机精轧辊型设计及应用

叙述了某热轧带钢生产中，在遵循板凸度一定的条件下所进行的轧辊辊型设计，通过对精轧工作辊配置辊型来改善带钢板形，从而提高产品实物质量。     

Research methods for profile analysis: Introduction to the special issue.

The five articles that make up the bulk of this special issue collectively illustrate new methods for examining the utility of sub-test and scale-level profile analysis. By necessity they are preliminary, but they illustrate methods that may indeed prove useful and may help resolve this divide between research and practice. This special issue grew out of a symposium conceived and organized by Cecil Reynolds at the American Psychological Association in 1998. The articles and one of the commentaries in this special issue are extensions of that symposium. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

基于Ajax与向量空间模型的个性化搜索引擎

针对个性化搜索的三个关键问题：用户信息搜集,用户信息库的动态更新与个性化检索算法,探索性地提出了基于Ajax用户行为跟踪方案,以会话为单位动态更新用户行为信息库策略与加入用户文档的向量空间检索模型,在此基础上设计并实现了个性化搜索引擎实验系统。