毛竹水溶性多糖提取工艺的优化及结构表征

采用响应面法优化毛竹水溶性多糖的提取工艺,分析其成分,并进行结构表征。研究结果表明,优化的毛竹多糖(BSP)提取条件为:料液比1∶27(g/mL)、提取温度78 ℃、提取时间4 h,该条件下BSP提取率为(5.18±0.07)%,提取物中多糖含量为(72.14±0.02)%,糖醛酸含量为(9.76±0.03)%;BSP具有酸性多糖典型的官能团特征吸收峰,其单糖组成及摩尔比为n_甘露糖∶n_葡萄糖∶n_阿拉伯糖∶n_木糖∶n_鼠李糖∶n_半乳糖=62.52∶23.05∶10.35∶2.78∶0.79∶0.51;BSP由两个主峰组成,相对分子质量分别为91.11、4.55 kDa。BSP是一种混合酸性多糖。     

员工企业社会责任感知影响人力资源管理效能？—基于领导行为的协同中介

通过对贵州、广东和福建3个省80家企业1148名员工进行调研,基于员工对企业社会责任、领导行为感知对人力资源管理效能带来积极影响为研究问题构建了一个中介模型。企业社会责任在组织微观层面的内涵越来越得到企业的重视,实现了员工的企业社会责任由产出需求转向投资视角,成为企业满足员工工作需要和工作资源的参照标准体系,有利于提升企业人力资源管理效能。本文研究发现:企业社会责任分别从企业经济责任、法律责任、伦理责任和自行裁量责任影响人力资源管理效能;变革型领导和交易型领导对企业社会责任和人力资源管理效能具有协同中介作用。研究结论对于企业社会责任、领导行为和人力资源管理三者匹配具有重要的理论和现实意义。     

The use of landslide hazard maps to determine mitigation priorities in a dam reservoir and its protection area

Despite longstanding research on the landslide hazard assessment and mapping, the use this information in regional planning applications remains largely unclear. There is still a need for novel methods to interpret the results of hazard analyses. In this respect, the main research question of this study is how the landslide hazard maps can be evaluated in planning practice. To evaluate this issue, a comprehensive case study was carried out and a new methodology, defining the order of priority for the locations where mitigation measures are applied was developed. The investigations were carried out in the Melen Dam reservoir, which provides potable water to the city of Istanbul, and the dam protection area (Duzce, Turkey) in four main stages: (i) Evaluation of the general characteristics of the study area, (ii) preparation of landslide inventory, (iii) development of landslide hazard model, and (iv) implementation of the results of hazard analyses in planning. As a consequence, a decision support system that can evaluate analytically complicated outputs “P_Combined”, “P_{AL min.}”, and “L_Total” and provide clear decisions “Urgent”, “Primary”, and “Secondary” was suggested. Considering the limited resources available for the mitigation measures, the determination of mitigation priorities for the micro-catchments constitutes the key land-use policy for the protection of the dam reservoir.     

Geographies of Algorithmic Violence: Redlining the Smart City

City governments are embracing data-driven and algorithmic planning to tackle urban problems. Data-driven analytics have an unprecedented capacity to call urban futures into being. At the same time, they can depoliticize planning decisions. I argue that this shift calls urban studies scholars to investigate geographies of algorithmic violence—a repetitive and standardized form of violence that contributes to the racialization of space and spatialization of poverty. This article examines this broader phenomenon through the case of a proprietary market value assessment that is being used to guide development in cities across the United States. The assessment employs an algorithm that helps city officials make critical decisions about which neighborhoods to target for investment, disinvestment and public service upgrades or disconnections. I argue that the racial, infrastructural, and epistemological violence associated with this evaluation can potentially lead to a new kind of municipal redlining. The article brings insights from critical race theory into conversation with critical scholarship on algorithms by analyzing how algorithmic violence works through data-driven planning technologies to depoliticize and leverage power while further entrenching racism and inequality.     

Tent City: Patterns of Informality and the Partitioning of Sacramento

Unsanctioned tent cities are increasing in number in cities throughout the western United States. Scholars explain the phenomenon as homeless people asserting their ‘right to the city’ or as ‘managed marginality’. These explanations capture much of the socio-political relationship between local government and homeless populations, but do not explain the long-term persistence of tent cities and the fluctuating nature of their visibility. A spatial history of informal encampments in Sacramento at three key moments—the founding of the city, the Great Depression and the Great Recession—reveals a long-term ebb and flow of tent cities occupying close-to-the-center, urban vacancies. Urban vacancies arise from the partitioning of the city into specific purposes, places and people, a taken-for-granted perception of how cities should be. The visibility of tent cities disrupts this aesthetic notion of stability and growth as homeless people use the tent to protest their isolation and exclusion.     

综放工作面动态分次加架技术实践

针对一些不规则布置的综放工作面,介绍了当工作面长度变长时,采取不同的布置及加架方式的优缺点。这对于一些储量较少,地质条件复杂的矿井具有很好的借鉴意义。     

How does attachment style influence the brand attachment – brand trust and brand loyalty chain in adolescents?

This study contributes to the growing body of literature investigating how and why consumers form connections to brands by applying an attachment theoretical framework. According to the attachment theory, children develop internal working models of the reliability of others in the interaction with the primary caregiver(s). It can be assumed that this attachment style, which is conceptualized along two dimensions (secure–anxious and dependent–independent), not only influences intimate relationships in the long run, but may also play an important role in customer relationships. The author investigates the influence of attachment style along the brand attachment – brand trust and brand loyalty chain. The sample consists of 216 adolescents. The results derived from structural equation modeling (SEM) by proposing a non-recursive model show that the dependent–independent dimension of parental attachment style positively influences the corresponding dimension of brand attachment predisposition and is important for all of the constructs along the brand attachment – brand trust and brand loyalty chain. However, this is not the case with the secure–anxious dimension of parental attachment style. The secure–anxious dimension of brand attachment predisposition does, on the other hand, have a significant impact at least on brand trust. The results are discussed from an attachment theoretical point of view and corroborate the suppositions of Rindfleisch, Burroughs, and Wong (2009 Rindfleisch, Aric, James E. Burroughs, and Nancy Wong. 2009. The safety of objects: Materialism, existential insecurity, and brand connection. Journal of Consumer Research 36 (1): 1–16.[Crossref], [Web of Science ®] , [Google Scholar]), who grounded their findings on terror management theory. Several possible implications of these results for the theory and practice of brand management and advertising, especially in the light of the gamification of advertising, are discussed.     

一种基于Edline线特征的车道线识别算法

为了提升车道线检测的准确性和实时性,改良车道偏离预警系统的性能,提出了一种新的车道线识别算法。首先应用投影法对采集到的图像设立感兴趣区域,以此来减少图像中存在的干扰信息;其次应用一种改进后的自适应高斯滤波算法对采集所得图像进行平滑处理,减少图像中不必要的细节;最后采用边缘绘制算法进行边缘检测,在此基础上,提出一种线段检测算法——Edline算法提取边缘线,对检测到的直线段进行筛选和聚类。利用引用计数法对车道线进行跟踪和预测。结果表明,新算法的平均处理时间为17.1 ms,准确率为96.19%,将其应用在车道偏离预警系统中可以有效地提高预警效率,提升预警的准确性和响应速度。研究结果丰富了车道线识别理论,可为车道偏离预警系统的应用及基础研究提供参考。     

上部覆盖层下伏页岩一类潜在滑坡演化变形机制分析

为研究上部覆盖层下伏页岩这一类型的滑坡失稳变形,需要确定其变形的潜在影响因素,从定量角度上分析这一类型滑坡灾害的变形演化问题。以容县六王镇西流河潜在滑坡为研究对象,借助钻孔勘探、室内试验和地质调绘,详细分析了西流河滑坡的工程地质概况,并推测其可能的变形演化机制,然后利用Geostudio数值软件建立西流河滑坡的渗流模型,模拟其在不同降雨工况下的渗流规律。研究发现:西流河滑坡在持续降雨过程中稳定性系数从1.224逐步降低至1.09,稳定性系数不断下降,滑坡体内由垂直入渗逐步转化沿滑动带稳定渗流;当遭遇极端暴雨情况(50年重现期)时,滑坡体内稳定渗流场显著增厚,饱和滑带土增多,滑坡安全储备达到极限。由此可以得出:上部覆盖层下伏页岩一类滑坡变形演化过程主要分滑坡体上部覆盖层堆积阶段,垂直入渗至页岩富水软化阶段和稳定渗流至潜在滑动带软化蠕变这3个阶段;其中上部覆盖层的高渗透性和下伏页岩的隔水特征是导致页岩风化带软化蠕变和稳定渗流场形成的关键因素。研究结果为上部覆盖层下伏页岩这一类滑坡影响因素的研究提供了一些证据,对研究滑坡演化变形机制具有借鉴意义。     

国家治理能力现代化下领导行为转变研究

实现国家治理体系和治理能力现代化离不开科学的领导方式和现代化的领导理念。新时期,领导干部要开阔思维,增强自身能力建设,形成与治理能力现代化相适应的领导新理念、新方法,实现从"管理"走向"治理"的领导行为方式转变。"治理"是对管理的继承与创新,治理强调控制少一些,引导多一些,"治理"要求领导干部要善于突破管理的桎梏,努力推进组织、制度、奖惩等管理要素的升级;同时要求领导干部沿着价值新方向不断探索,发挥愿景、利益和魅力的作用。