以太网光桥的研究

根据有关网络技术和具体的实验,提出一种以太网光桥的实现方案,并对光桥的几个性能参数进行了分析讨论。     

老年人乡村休闲养老意愿影响因素实证考察——以重庆主城都市区为例

乡村休闲养老产业发展丰富了农村产业业态,是实现乡村产业振兴的重要抓手,也是缓和城市养老压力和提高人民生活质量的重要举措。文章基于2020年9月—2020年12月重庆市主城都市区的问卷调查数据,采用logistic模型验证了影响老年人乡村休闲养老参与意愿的因素。研究结果表明家庭代际冲突、健康程度、自然环境、硬件及配套设施、服务质量均能对老年人参与意愿产生显著影响,但影响效果有所差异。结合研究结论,为推动重庆乡村休闲养老产业发展,增强参与意愿,文章提出了相应对策建议。     

农业绿色全要素生产率测度及收敛性分析——基于碳汇和碳排放双重视角CSSCI

对农业绿色全要素生产率进行科学合理的测度有助于精准把握农业碳减排潜力。本文基于2000—2019年我国省际面板数据,分别从碳汇和碳排放两个角度测度农业绿色全要素生产率,并进行了空间收敛性分析。结果表明:(1)考察期内农业绿色全要素生产率年均增速为1.1%,农业技术进步是其增长的主要动因;(2)农业绿色全要素生产率在时空演化过程中具有差异性和阶段化特征;(3)农业绿色全要素生产率呈现显著正向空间关联性,且逐渐强化,农业绿色全要素生产率较低地区发展速度要高于农业绿色全要素生产率较高地区,区域差异正在减小。研究结果对于精准评判农业碳减排潜力和碳吸收能力、实现“双碳”目标具有参考意义。     

城市交通系统景观生态设计初探

分析了城市景观的主要特征和城市(城镇)交通景观的结构和功能。强调了城市景观的保护和规划管理。初步分析了城市交通廊道系统的景观生态功能。探讨了城市交通景观生态的设计原则。以江南水乡为例,分析讨论了几种城市交通景观生态设计模式。     

流动注射─—化学发光法同时测定痕量Cr(Ⅵ)/Cr(Ⅲ)

提出一个反相流动注射-化学发光法同时测定Cr（Ⅵ）Gr(Ⅲ）的方法,基于皮素－H2O2－Cr（Ⅵ）－KOH化学发光反应直接测定Cr（Ⅵ）;Cr（Ⅲ）在PbO2柱氧化后测定．方法简单,快速,检测限为1．0×10－9Cr（Ⅵ）,线性范围为1．0×10－8~1．0×10－6g/mlCr（Ⅵ）,用于淮河水样分析,结果满意．     

Moment‐Independent Sensitivity Analysis Using Copula

In risk assessment, the moment‐independent sensitivity analysis (SA) technique for reducing the model uncertainty has attracted a great deal of attention from analysts and practitioners. It aims at measuring the relative importance of an individual input, or a set of inputs, in determining the uncertainty of model output by looking at the entire distribution range of model output. In this article, along the lines of Plischke et al., we point out that the original moment‐independent SA index (also called delta index) can also be interpreted as the dependence measure between model output and input variables, and introduce another moment‐independent SA index (called extended delta index) based on copula. Then, nonparametric methods for estimating the delta and extended delta indices are proposed. Both methods need only a set of samples to compute all the indices; thus, they conquer the problem of the “curse of dimensionality.” At last, an analytical test example, a risk assessment model, and the levelE model are employed for comparing the delta and the extended delta indices and testing the two calculation methods. Results show that the delta and the extended delta indices produce the same importance ranking in these three test examples. It is also shown that these two proposed calculation methods dramatically reduce the computational burden.     

基于DSPF2812的发动机转速测量系统设计

在研究现有的几种发动机转速测量方法基础上,设计了一种以T型测速方法为原理,以DSPF2812为控制核心的发动机转速测量系统。给出了系统的测量原理以及实现发动机转速测量的软件编程方法和信号调理电路设计,同时应用LabVIEW软件实现对信号的监测和数据存储,最后对该测量系统进行了实验测试,在实际测试中取得了良好的效果。该系统具有测速精度高、测速范围广以及实时性强等特点,为汽车发动机性能研究、故障处理以及后续的分析提供了重要的参考依据,同时该系统还可以应用到电机测速等其它测速领域,具有较高的实用价值。     

民族地区脱贫户返贫风险评估与预警机制构建

有效识别返贫风险并及时预警是阻断脱贫人口返贫的前提.采用生计脆弱性 分析框架构建民族地区脱贫户返贫风险评估体系,并对西南民族地区脱贫户返贫风险进行 测算,在此基础上构建脱贫户返贫预警机制.结果发现:脱贫户的返贫风险主要集中在人力 风险和金融风险,是兼有一定程度的自然、物质、社会风险的高度复合形态;脱贫户返贫预警 机制应结合警度与警源,针对不同风险等级的脱贫户,持续测度其生计状况,评估政策有效 性,优化改进方案.因此,民族地区政府面对不同风险等级的脱贫户,政策制定需要因户制 宜;五大返贫风险需应对及时,靶向精确;应着力于改善区位条件,挖掘资源优势,为脱贫户 提供多样化的生计策略选择.     

成都建设“世界现代田园城市”的战略构想

创建“世界现代田园城市”是成都在全球经济一体化、中国和平崛起和西部大开发背景下所确立的全球定位和长期战略。本文阐述了“世界现代田园城市”的内涵与特征,探讨了成都建设“世界现代田园城市”的基本条件、发展目标与功能定位,提出了相应的战略路径和对策措施。     

The classing gaze and its gendering effects: (dis)‐respectability,emotional (in)‐competency,and the counselling experiences of domestically violent Taiwanese men

Research on domestically violent men typically takes an oppositional logic of gender. While the significance of class in researching domestically violent men is identified, class and gender are often treated as separate entities that do not complicate each other. Drawing upon group observations and in‐depth interviews, this paper identifies how intersections of class and gender manifest in the counselling experiences of domestically violent Taiwanese men. From a Bourdieusian feminist analysis, the authors analyse (1) how class distinctions serve to (re)produce gendered hierarchy; (2) how contradictory experiences of gender reveal a relational understanding of class; and (3) how the gendered nature of domestically violent men is inscribed with a meaning of (working) class specificity for maintaining middle‐class ‘purity’. In analysing men's multiple and conflicting experiences, this paper contributes to research on domestically violent men by showing how class and gender are actively constructed and not produced in a monolithic/invariant way.