不确定条件下第三方物流企业一体化物流网络设计

针对第三方物流企业的运作特点,研究了不确定环境下第三方物流企业正逆向一体化物流网络的设计问题.首先,应用三角模糊数描述客户需求和运输费用的不确定性,建立了一个考虑多产品、多客户、容量限制及一体化网络设计的模糊模型.为求解模糊模型,应用模糊机会约束理论、可能度理论将其转化为确定型模型,然后设计出一个混合遗传算法求解确定型模型.最后,利用2个不同规模的算例验证了所提出的模糊模型和求解算法的有效性.     

一类非线性扰动中立型系统的鲁棒镇定

讨论了一类非线性扰动中立型系统的鲁棒镇定问题．在非线性不确定性满足增益有界条件下，首先给出了自由系统鲁棒稳定的一个充分条件，接着通过构造无记忆状态反馈控制器，给出了闭环系统渐近稳定的充分条件．     

数据处理在气体比热容比的测定实验中的应用

本文以"气体比热容比的测定"实验中的数据处理为例,完整地展示大学物理实验数据处理的全过程,主要包括测量位数的选取,不确定的确定,以及不确定度通过运算的传递.     

Engagement with research: acknowledging uncertainty in methodology

Method creates relationships in research. It positions everyone and everything in the research process. When method is based on a misrepresentation of science, the relationships formed are technical, closed and self-referential. Using a Deleuze–Guattari framework we are concerned that scientific method in qualitative research solidifies, crystallizes and archaeologizes the research. This paper questions what is being ruled out and deemed as unimportant, or indeed contaminating and fallacious in such research. We argue for the acknowledgement of uncertainty as this allows for more engagement with the research and researched. Deleuze and Guattari argue for multiplicity, connectivity and becoming. This paper calls for acknowledging and mentoring uncertainty at every stage of the teaching and learning of method.     

Proportional-integral-derivative control of nonlinear half-car electro-hydraulic suspension systems

This paper presents the development of a proportional-integral-derivative (PID)-based control method for application to active vehicle suspension systems (AVSS). This method uses an inner PID hydraulic actuator force control loop, in combination with an outer PID suspension travel control loop, to control a nonlinear half-car AVSS. Robustness to model uncertainty in the form of variation in suspension damping is tested, comparing performance of the AVSS with a passive vehicle suspension system (PVSS), with similar model parameters. Spectral analysis of suspension system model output data, obtained by performing a road input disturbance frequency sweep, provides frequency response plots for both nonlinear vehicle suspension systems and time domain vehicle responses to a sinusoidal road input disturbance on a smooth road. The results show the greater robustness of the AVSS over the PVSS to parametric uncertainty in the frequency and time domains.     

用自制圆锥摆与Spss标定重力加速度

用直流电源驱动自制圆锥摆实验系统,使小钢球做较为稳定的圆锥摆运动,可显著减弱小钢球的滞后现象,从而可忽略空气阻尼等因素的影响,使得对圆锥摆周期的测量更为准确。由测量原理及不确定分析,结合测量数据,用Spss分析得出长度综合量（A）与圆锥摆运动周期的平方（T2）呈线性关系,由此标定出重力加速度,并用置信概率为95%的不确定度对实验结果进行了分析与评价。     

Responses to changes in relational uncertainty within dating relationships: Emotions and communication strategies

Guided by the appraisal theory of emotion, this paper examines how various emotions shape communication strategies within romantic relationships. Events that changed people's relational uncertainty levels provide the context for the investigation. Participants in dating relationships (N = 141) described their experience of relational certainty and uncertainty increasing events. Relational certainty increases coincided with relatively high levels of happiness, and relational uncertainty increases corresponded with heightened degrees of anger and sadness. Integrative behaviors were a frequently reported response to both kinds of events. Consistent with appraisal theory, specific emotions were associated with particular strategies; however, some effects were moderated by the type of event. The discussion highlights the utility of appraisal theory for understanding how romantic partners manage fluctuations in relational uncertainty.     

Revisiting the Importance of Detachment in the Dynamics of Competition

In this paper, we adopt the framework of analysis of the economy of qualities [Callon, M., Méadel, C. & Rabeharisoa, V. (2002) ‘The economy of qualities’, Economy and Society, vol. 31, no. 2, pp. 194–217] to describe the sales and marketing practices of a French farm supply company whose products have uncertain characteristics and disputed effects. We show that this uncertainty leads sales staff of the company to develop an argument designed to generate attachments but also, and even more importantly, detachments. We also show that these detachments and attachments do not just concern the farmer, the company and its products. To understand the competitive dynamics involved here, it is also necessary to focus on the associations that are broken and established with natural entities, actors in the supply chain, institutions of agricultural science and conceptions of the farming profession.     

Enabling innovation in the face of uncertainty through IT ambidexterity: A fuzzy set qualitative comparative analysis of industrial service SMEs

Taking a configurational approach, this paper investigates the causal configurations of IT ambidexterity (i.e., IT capabilities for exploitation and exploration), dynamic capabilities (i.e., innovation and networking capabilities) and environmental uncertainty that are associated to service innovation performance in small and medium-sized enterprises (SMEs). Results from a fuzzy set qualitative comparative analysis (fsQCA) of 63 industrial service SMEs show that these firms attain high service innovation performance with three different configurations under conditions of high uncertainty. Two configurations highlight the importance of IT exploration capabilities (combined with the absence of innovation and networking capabilities in one configuration and with the absence of networking capabilities and IT capabilities for exploitation in another), whereas another configuration accentuates the importance of IT exploitation capabilities (combined with the presence of innovation and networking capabilities). Our study contributes to the literature in multiple ways. For instance, due to the equifinal properties of the configurational approach, our results suggest that SMEs can attain high innovation performance through both sequential and simultaneous IT ambidexterity, thus providing a starting point for reconciling competing views of IT ambidexterity. Other contributions to theory and practice and avenues for future research are also discussed.     

Identification with sport teams as a function of the searchfor certainty

Abstract

Based on ideas from subjective uncertainty reduction theory, we examined the extent to which individuals hold similar sport team preferences to their family and friends. We also assessed the extent to which perceived sport importance and personal need for structure are influential in the development of team identification. Australian high school students aged 15.5±1.0 years (mean±s) completed questionnaires containing the Personal Need for Structure Scale, the Relational-Interdependent Self-Construal scale, a Team Identification Scale, and items assessing perceptions of sport importance and team preferences. As expected, correlations indicated that preferences for sport teams were significantly related to the preferences of family and friends. Separate analyses of variance confirmed the remaining hypotheses. More specifically, individuals who perceived that sport was important identified with the team more than individuals who perceived sport to be less important. Also, individuals high in personal need for structure scored higher in cognitive/affective team identification than those low in this need. Individuals with differing needs for structure did not differ in their scores on other dimensions of team identification. The results support the notion that cognitive/emotional attachments to sport teams are influenced by perceptions of the importance of sport and by needs for subjective structure. It is possible that other psychological motives, such as the desire for self-esteem, facilitate the development of evaluative dimensions of team identification.