钴掺杂氨硼烷分子的密度泛函理论研究

采用密度泛函理论研究了钴掺杂氨硼烷分子(Co-NH3BH3)在结构和能量方面的变化.首先对氨硼烷分子在不同波函数基组下进行优化.然后,将Co掺杂在优化后的氨硼烷分子中,计算Co掺杂后对氨硼烷分子的影响.结果表明,当钴掺杂之后,氨硼烷分子中氢原子Mulliken电荷变化明显,氢原子稳定性变差,体现了钴作为催化剂对氨硼烷分子的影响.     

英语语言模糊性及翻译

模糊性是人类语言的基本特性之一。模糊语言对反映客观世界,表达人类思想具有重要作用;同时,也给翻译造成障碍,并引起了越来越多翻译者的关注。本文主要讨论了模糊语言在语音、词义、语法和跨文化交际中的应用和翻译策略。     

从功能翻译理论浅析旅游文本中文化信息的翻译

我在旅游文本的翻译过程中,文化信息的有效传递是旅游资料英译中要解决的难题。根据彼得·纽马克的理论,认为旅游资料属于以呼唤功能为主的文章,其核心是读者,其英译而应以传递信息为第一要务。结合汉译英旅游资料,对功能理论在旅游翻译中的应用进行了具体分析。认为译者在旅游资料英译过程中应从译语读者的角度出发,最大限度地传递出原文的核心信息,根据译文的预期目的来决定自己的翻译策略与方法。灵活运用增译、省译、改写的翻译策略,使译文能够达到,较好的沟通交流效果。     

基于形式概念分析的信息系统建模理论研究

针对如何运用FCA完善信息系统建模理论的问题,明确信息系统建模要解决的核心问题和利用FCA在解决上述问题的优势,指出FCA在信息系统建模中的应用方向,提出一套基于FCA的信息系统建模理论,并结合实例详细阐述应用FCA进行子系统划分的方法和构建静态模型、动态模型和功能模型的原理。     

中国可持续发展功能分区可视化系统研制

可持续发展功能分区信息是区域空间规划与管理决策支持的重要依据,具有多维时空特征,采用地理信息可视化技术有利于从空间和时间角度揭示可持续发展功能分区信息中所隐含的规律与发展变化趋势。本研究利用可视化技术、组件式GIS技术和空间数据库引擎,开发了可持续发展功能分区可视化系统框架,包括数据源层、元数据层、软件构件层和功能模块层,实现了可持续发展功能分区信息的综合查询、结果显示与分析、图表可视化和地理可视化功能。在该系统框架基础上,本研究集成了全国1∶100万基础地理数据、分县社会经济统计数据和可持续发展功能分区体系,建立了中国可持续发展功能分区可视化系统,实现了数据信息和功能分区成果的可视化表达、图形和属性的双向查询、查询结果的统计分析、制作统计图表和制作专题地图,为政府部门、科研机构和公众了解和利用可持续发展功能分区信息提供了科学支撑。     

旅游电子商务网站的功能优化研究

本文以旅游电子商务网站的功能为视角,从旅游电子商务网站发展概况出发,介绍了旅游电子商务网站的概念、建立过程、功能、基本运作模式、分类,并结合携程网和青旅在线用图表作出简要分析,联系实际,指出旅游电子商务网站目前存在的主要问题,用图文结合的方式提出建议,以期优化旅游电子商务网站功能,提高其旅游服务质量。     

Collegiate baseball players with more optimal functional movement patterns demonstrate better athletic performance in speed and agility

Sports injuries are common among baseball players and may result in abnormal movement patterns, increased risks of future injury, and unsatisfactory performance. The Functional Movement Screen (FMS?) has been developed to detect abnormal functional movement patterns and can be used for predicting risks of sports injury. However, whether FMS? scores are associated with athletic performance remains unclear. The goal of this study was to determine the association between functional movements and athletic performance in elite baseball players. Core stability, muscular strength and flexibility of the lower extremities, and FMS?, as well as athletic performance in sprinting, agility, and balance tests were assessed in 52 male collegiate Division I baseball players placed into two groups based on FMS? scores. The high-scoring group demonstrated better athletic performance than the low-scoring group, with a shorter duration of the agility test. No group differences were found in core stability, muscular strength, or muscle flexibility, except for rectus femoris flexibility. Thus, the FMS? score is associated with sprinting and agility performance in elite baseball players. These findings indicate that the FMS? may have a role in predicting athletic performance and thereby help determine the goals of training regimens or return-to-play strategies.     

Postural control quantification in minimally and moderately impaired persons with multiple sclerosis: The reliability of a posturographic test and its relationships with functional ability

BackgroundPostural control has been associated with the functional impairment in persons with multiple sclerosis (pwMS). However, there is a need for reliable methods to assess postural control in early stages of the disease, when subtle changes can be difficult to detect. The aims of this study were to assess the absolute and relative reliability of a standing and a sitting posturographic protocol in minimally (Expanded Disability Status Scale ≤ 2) and moderately (2.5 ≤ Expanded Disability Status Scale ≤ 4) impaired pwMS, and to analyze relationships among postural control and functional mobility and gait performance.MethodsTo assess postural control in an upright stance, 14 minimally and 16 moderately impaired pwMS performed six 70 s trials in tandem stance, 3 with their weaker leg behind (TS_WL) and 3 with their stronger leg behind (TS_SL). Additionally, participants completed five 70 s trials using an unstable sitting protocol (US) to assess trunk stability. The mean radial errors of TS_WL, TS_SL, and US trials were calculated as postural control indexes. Furthermore, participants performed the Timed Up and Go test (TUG) and the Timed 25-foot Walk test (T25FW) to measure their functional mobility and gait speed, respectively. Reliability was evaluated using the intraclass correlation coefficient (ICC_3,1) and the standard error of measurement (SEM). Analyses of variances were carried out to assess between-group differences. Hedges’ g index (d_g) was used to estimate the effect size of differences. Pearson correlation analyses (r) were performed to examine the relationships among the postural control and the functional tests.ResultsPosturographic tests showed a high reliability in both minimally (0.87 ≤ ICC ≤ 0.92; 9.32% ≤ SEM ≤ 11.76%) and moderately (0.80 ≤ ICC ≤ 0.92; 10.33% ≤ SEM ≤ 15.33%) impaired pwMS. Similarly, T25FW and TUG displayed a high consistency in minimally (0.89 ≤ ICC ≤ 0.94; 3.43% ≤ SEM ≤ 5.17%) and moderately (0.85 ≤ ICC ≤ 0.93; 5.57% ≤ SEM ≤ 6.56%) impaired individuals. Minimally impaired pwMS showed a better performance on the TUG, T25FW, and TS_WL than moderately impaired individuals (p < 0.05; d_g ≥ 0.8). The TS_WL, TS_SL, and US variables correlated with TUG scores (0.419 ≤ r ≤ 0.604; p < 0.05), but TS_WL also correlated with T25FW scores (r = 0.53; p < 0.01). Furthermore, US scores correlated with both tandem stance parameters (TS_WL: r = 0.54, p < 0.01; TS_SL: r = 0.43, p < 0.05).ConclusionTandem and sitting posturographic tests provide reliable measures of postural control in pwMS, even in individuals with a homogeneous disease profile. Gait speed, functional mobility, and weaker leg status seem decisive in assessing the degree of physical activity limitation in pwMS. Finally, although trunk stability does not seem to be so affected by the course of the disease, it remains relevant for postural control and functional capacity.     

论网络安全事件集中管理系统的实现

基于现有网络安全事件集中管理系统的欠缺以及发展方向问题,设计了一个网络安全事件集中管理系统,提出了系统的总体构架。根据设计目标,提出了系统设计的思路,着重介绍了系统设计的体系结构,介绍了系统的整体实现功能模型框架,为系统的实现提供指导思路。     

有限集合等价关系的个数

本文得出了求n元集合等价关系个数的递推公式。