电压互感器测量不确定度的评定

文章通过实例分别对电压互感器的比值差和相位差的测量不确定度进行了分析和评定。     

环境不确定性、会计稳健性与公司研发创新——来自战略性新兴产业民营A股上市公司的经验证据

以战略性新兴产业民营A股上市公司的2014—2018年度财务报告数据为研究对象,探讨环境不确定性、会计稳健性对公司研发创新的影响。研究结果表明,会计稳健性对公司研发创新具有正向促进作用,环境不确定性对公司研发创新具有负向影响,会计稳健性是对环境不确定性的一种谨慎反映,可以抑制环境不确定性对公司研发创新的负面影响。通过区分环境不确定程度,进一步发现当环境高度不确定时,会计稳健性对公司研发创新的正面促进作用更加显著,当环境低度不确定时,会计稳健性对公司研发创新的作用并不显著。     

Estimation of the measurement uncertainty and practical suggestion for the description of the metrological traceability in clinical laboratories

Clinicians request a large part of measurements of biological quantities that clinical laboratories perform for diagnostic, prognostic or diseases monitoring purposes. Thus, laboratories need to provide patient’s results as reliable as possible. Metrological concepts like measurement uncertainty and metrological traceability allow to know the accuracy of these results and guarantee their comparability over time and space. Such is the importance of these two parameters that the estimation of measurement uncertainty and the knowledge of metrological traceability is required for clinical laboratories accredited by ISO 15189:2012. Despite there are many publications or guidelines to estimate the measurement uncertainty in clinical laboratories, it is not entirely clear what information and which formulae they should use to calculate it. On the other hand, unfortunately, there are a small number of clinical laboratories that know and describe the metrological traceability of their results, even though they are aware of the lack of comparability that currently exists for patient’s results. Thus, to try to facilitate the task of clinical laboratories, this review aims to provide a proposal to estimate the measurement uncertainty. Also, different suggestions are shown to describe the metrological traceability. Measurement uncertainty estimation is partially based on the ISO/TS 20914:2019 guideline, and the metrological traceability described using the ISO 17511:2020. Different biological quantities routinely measured in clinical laboratories are used to exemplify the proposal and suggestions.     

Robust Adaptive Control Design for Rotorcraft Unmanned Aerial Vehicles Based on Sliding Mode Approach

This paper presents a nonlinear robust control design method for a generic rotorcraft unmanned aerial vehicle（RUAV）. The control objective is to let the RUAV track some pre-defined time-varying position and headingtrajectories. The proposed controller employs feedback linearization process to realize the dynamic decoupling controland applies adaptive sliding mode control to compensate for the parametric uncertainties and external disturbances.The global asymptotical stability is proved via stability analysis. Compared with the cascaded controller, the proposedcontroller demonstrates a superior tracking performance and robustness through numerical simulation in the presenceof parametric uncertainties and unknown disturbances.     

大学生自尊对社交焦虑的作用机制研究

采用Rosenberg自尊量表、拒绝敏感性量表、不确定感忍耐性量表、社交焦虑量表对563名大学生进行问卷调查。结果表明:自尊负相关于拒绝敏感性、无法忍受不确定性和社交焦虑,拒绝敏感性正相关于无法忍受不确定性和社交焦虑,无法忍受不确定性正相关于社交焦虑;拒绝敏感性和无法忍受不确定性在自尊与社交焦虑间起着中介作用。这表明,自尊不仅可以直接影响社交焦虑,而且可以通过拒绝敏感性和无法忍受不确定性的中介作用间接影响社交焦虑。     

试论《茫茫藻海》中安托万内特的悲剧成因

从安托万内特身份的不确定性、罗切斯特对安托万内特的殖民化和安托万内特自身的软弱三个方面层层剖析安托万内特的悲剧成因。安托万内特身份致使她成为不被任何一方接纳的边缘人,极度渴望归属感的她多次努力失败。罗切斯特对安托万内特的殖民化,剥夺了她得以依靠和安生的东西:财产,身体,姓名和自由。安托万内特自身的软弱性是导致最终走向灭亡的内在原因。     

试论会话语用场中的“隐性期待”

在我们日常会话中经常会出现一种现象——“隐性期待”，即说话人处于言语策略上的考虑，不愿让自己的真实意图外露，于是把期待置于话语表面形式之后，希望听话人能从话语的表面形式推导出这种含而不露的期待。章结合“隐性期待”在话语中如何实现、受阻等情况对其产生的主要条件及特点加以分析。     

转子流量计示值误差测量不确定度的评定

文章通过实例对转子流量计的示值误差不确定度进行了分析和评定.     

不确定性影响下的系统集成知识创新成本分摊

异构信息系统集成知识创新需要项目各方的资源投入与成本耗费,但由于行业经验、集成经验、知识共享、项目管理等诸多环节存在不确定性,项目主体对项目成功产生不确定性预期,并最终导致对知识创新过程产生顾虑,抵制知识创新成本分摊。本文从知识积累的角度构建不确定预期影响下的知识创新模型与知识创新成本模型,并通过模型演算得到知识创新成本分摊机制,即原系统服务商承诺成本分摊将提高项目成功预期,促进委托方提升努力程度,并且原系统服务商承诺分摊比例受到自身学习能力、委托方学习能力、不确定性预期、以及自身知识创新效率的共同影响。     

基于排队论模型的不确定条件下的城市固体废物管理模型

在本文研究中,通过引进排队模型到一个区间线性优化模型的框架内,建立了中国某市的基于排队论的区间线性规划模型(QB-ILP)。QB-ILP的模型不仅可以解决复杂城市固废展示系统的不确定性,也反映了队列容量有限模型对于制定城市固废决策问题的影响。此外,该方法为决策者提供了更多有用的不确定信息。通过有效地规划城市固体废物管理系统,将有利于降低运营废物管理设施的污染问题。