基于组织视角的隐性知识管理系统动力学分析

对隐性知识的有效管理是知识价值实现的重要途径。以组织的视角为出发点,首先根据组织进行隐性知识管理的内容,将组织的隐性知识管理任务划分为三部分,然后根据影响组织进行隐性知识管理的若干因素设计系统动力学模型,通过对该模型的分析,明确在组织实施隐性知识管理的过程中,各因素之间的逻辑因果关系及反馈关系,最后提出提高组织隐性知识管理效率的若干措施。     

固体材料导热系数的分子动力学模拟

采用分子动力学方法对金属和非金属材料薄膜的导热系数进行数值模拟. 非金属材料氩的粒子间相互作用势采用12/6 L-J势能模型,金属材料钨使用MEAM势能模型. 模拟结果表明,非金属材料氩的导热系数与已有实验结果符合较好,但金属材料钨的导热系数结果较实验结果小1~2个数量级. 研究结果表明,引入自由电子导热模型能较准确预测金属材料钨的导热系数变化规律.     

科学知识增长过程中系统自组织创生模式研究

[目的/意义]通过微观层面上个体的因果相互作用来阐述信息计量领域宏观幂律分布现象形成的必然性,将其从随机性的统计规律转变成为必然性的动力学规律。[方法/过程]在幂律分布必然性的揭示上,抛弃粗糙的机械还原论视角,而将其放在更加精密的复杂系统的分析框架下。数学论证上以普赖斯引文网络为实例,运用主方程、隐马尔科夫链推导出双参数广义普赖斯定理β函数数学描述并进一步推导出3条数学性质。[结果/结论]将信息计量领域普遍存在的偏态随机性统计规律发展成为确定性的系统动力学规律,即在简单线性累加优势规则而非马太效应规则的约束下,通过最细粒度层级上的因果二元组的多次正向性互动反馈,经由临界涨落和对称性打破,根据严谨的网络动力学数学语言描述出系统的自组织有序性稳态建构。     

微信群会话网络结构及成员角色划分研究

[目的/意义]微信群内部会话交流过程存在着复杂的网络结构,探究微信群内部网络结构特征并划分成员角色对研究微信群中信息传播及成员角色关系具有重要意义。[方法/过程]以虚拟社区理论和会话分析理论为基础,以真实微信群内部的会话数据作为研究对象,通过构造成员活跃度划分微信群成员角色类型,基于成员相互回应行为与共同回应行为设计成员关联强度算法并构建会话交流网络,采用社会网络分析和内容分析方法对其静态结构特征及动态结构演化进行分析。[结果/结论]微信群内部成员角色及地位具有差异性,会话交流过程呈现出明显的中心性态势;微信群会话交流网络符合六度分割理论,具有小世界效应的特征;微信群会话交流网络具有动态演化性且核心成员具有时间依赖性。     

Proposals for improving the transition process of young people with intellectual disabilities in Spain: insights from focus groups of professionals,young people and their families

This research aims to present proposals that can improve the transition to adulthood of young people with intellectual disabilities (ID). Four focus groups were set up in three different cities in Spain, each comprising education and social work professionals, people with ID and family members. In total, 32 participants were included in the study. The discussions were recorded, transcribed and analysed using thematic content analysis. Improvements proposed by participants were organised into six themes: coordination between services and professionals; curricular approaches; participation by young people with ID; peer-relationship networks; family and administration. Participants highlighted the need to make the curriculum more flexible and foster curricular experiences related to social and workplace inclusion, as well as establish more continuity in guidance processes throughout the different stages of education and especially at the end of secondary education. Participants also suggested the need for young people with ID to have a more prominent role in their educational process, and strengthening their social networks by promoting their participation in community activities.     

群体资源对个体知识共享的跨层次影响：心理资本的视角

群体心理资本作为一种重要的战略资源对个体知识共享产生积极影响,但至今鲜有研究对两者关系进行分析。整合工作要求-资源模型、社会交换理论,本研究构建了群体心理资本影响个体知识共享的跨层次模型,探讨了群体信任在两者关系间的不同行为效应,并通过多层线性分析等方法对问卷调查收集的数据进行实证分析。研究结果表明：(1)群体心理资本对个体工作参与、个体知识共享具有显著的正向预测效果;(2)群体心理资本对群体信任具有显著的正向预测效果,且群体信任在群体心理资本与个体工作参与关系之间起到中介作用;(3)群体信任跨层次正向调节个体工作参与与个体知识共享之间的关系。     

Mechanical power output in rowing should not be determined from oar forces and oar motion alone

Mechanical power output is a key performance-determining variable in many cyclic sports. In rowing, instantaneous power output is commonly determined as the dot product of handle force moment and oar angular velocity. The aim of this study was to show that this commonly used proxy is theoretically flawed and to provide an indication of the magnitude of the error. To obtain a consistent dataset, simulations were performed using a previously proposed forward dynamical model. Inputs were previously recorded rower kinematics and horizontal oar angle, at 20 and 32 strokes?min^?1. From simulation outputs, true power output and power output according to the common proxy were calculated. The error when using the common proxy was quantified as the difference between the average power output according to the proxy and the true average power output (P?_residual), and as the ratio of this difference to the true average power output (ratio_res./rower). At stroke rate 20, P?_residual was 27.4 W and ratio_res./rower was 0.143; at stroke rate 32, P?_residual was 44.3 W and ratio_res./rower was 0.142. Power output in rowing appears to be underestimated when calculated according to the common proxy. Simulations suggest this error to be at least 10% of the true power output.     

白俄罗斯皮划艇协会与国际皮划艇联合会体育仲裁案例评述

通过对2016年白俄罗斯皮划艇协会与国际皮划艇联合会体育仲裁案例的分析,得出研究结论：禁用药物超长的代谢时间不能成为反兴奋剂规则具有溯及力的理由;虽然《世界反兴奋剂条例》第11条的规定因为存在"集体项目"这一前提而没有违反个人责任原则,但该条第12条由于规定得过于简单仍然违反了该原则;国家司法机关刑事诉讼程序中发现的兴奋剂药物证据,在刑事诉讼程序终止而证据未经质证的情况下,不能直接作为兴奋剂违规行为的认定证据。     

Hip joint kinetics in the table tennis topspin forehand: relationship to racket velocity

The purpose of this study was to determine hip joint kinetics during a table tennis topspin forehand, and to investigate the relationship between the relevant kinematic and kinetic variables and the racket horizontal and vertical velocities at ball impact. Eighteen male advanced table tennis players hit cross-court topspin forehands against backspin balls. The hip joint torque and force components around the pelvis coordinate system were determined using inverse dynamics. Furthermore, the work done on the pelvis by these components was also determined. The peak pelvis axial rotation velocity and the work done by the playing side hip pelvis axial rotation torque were positively related to the racket horizontal velocity at impact. The sum of the work done on the pelvis by the backward tilt torques and the upward joint forces was positively related to the racket vertical velocity at impact. The results suggest that the playing side hip pelvis axial rotation torque exertion is important for acquiring a high racket horizontal velocity at impact. The pelvis backward tilt torques and upward joint forces at both hip joints collectively contribute to the generation of the racket vertical velocity, and the mechanism for acquiring the vertical velocity may vary among players.     

基于系统动力学的建筑废弃物管理模型研究

运用系统动力学理论方法研究建筑废弃物现场管理问题,分析影响建筑废弃物现场管理的主要因素及相互关系,建立包括废弃物产生、现场分类分拣和废弃物处理3个子系统的建筑废料现场管理模型,同时借助软件Vensim进行模拟评估。实证结果表明:基于系统动力学构建的建筑废弃物现场管理模型能够有效模拟施工阶段建筑废弃物的产生与处理,通过减少设计变更、提高减量化意识以及施工现场分类分拣等操作,都可以有效减少废弃物的产生及其处理成本。该方法可用于项目管理人员对管理效果进行模拟及预测。