南四湖区湿地信息遥感提取技术研究

利用遥感技术快速、定量地提取变化较快的湿地信息是重要的遥感研究内容之一;以南四湖区为试验区,利用TM数据,在对图像处理的基础上,根据该区各湿地类型及其它相关地类的光谱特征,提出了单红外阈值法与改进的监督分类相结合,分层提取湿地信息的技术方法,显示该区共有湿地14类,其中,自然湿地91 119.51hm2,人工湿地12 2243.13hm2。     

洗涤助剂层状结晶二硅酸钠的技术进展及发展前景

介绍了新一代无磷洗涤助洗荆——层状结晶二硅酸钠的性能、技术进展情况,并对今后层状结晶二硅酸钠的发展提出了自己的见解。     

地震荷载下反倾层状岩质边坡倾倒变形破坏规律及数值模拟研究

为了掌握不同地震荷载作用下的边坡稳定性能,采用振动台试验并结合离散元数值模拟对典型反倾层状岩质边坡进行了分析,对地震作用下反倾层状岩质边坡的动力响应特性和变形破坏规律进行了研究。结果表明：1)边坡的顶部和坡面首先出现变形,边坡开始出现层间错动导致最终彻底破坏;2)地震波频率对边坡的变形破坏有着显著影响,不同频率正弦波作用于边坡时,边坡上各个地方的加速度响应状况各不相同;3)在频率较小的正弦波作用下边坡的顶部及坡面浅表部松动变形,在频率较大的正弦波作用下边坡内部出现横向拉张裂缝,拉张裂缝会导致边坡的崩塌溃坏;4)在数值模拟分析边坡的加速度响应情况时,从边坡底部到顶部,随着高程的不断增加,其加速度放大系数增长幅度逐渐增加;5)地震波不仅影响边坡上监测点位加速度响应的大小,同时还对不同高程下其加速度响应变化情况产生影响。研究结果显示了边坡加速度响应数值模拟分析与振动台模型试验结果的一致性,所得结论对工程施工参数设计具有一定的借鉴价值。     

低比压履带式集矿机履带板的破损分析与改进

文章在介绍低比压履带式集矿机行走机构结构原理的基础上,对履带板在试验中的破损现象进行了详细的描述。通过对履带板的静态实体仿真分析得到了履带板的位移及应力云图,同时结合试验条件分析了导致履带板破损的原因,并提出了相应的预防措施和改进建议,对低比压履带式集矿机的改进与完善及性能的充分发挥有着重要的现实意义。     

交通基础设施、人力资本分层集聚与区域全要素生产率——基于我国285个地级市面板数据的经验分析

本文以2003～2013年285个地级市的面板数据,考察中国交通基础设施通过人力资本流动与集聚进一步影响区域全要素生产率的内在机制。研究结果显示：（1）交通基础设施的完善对区域全要素生产率具有显著的正向作用,更加有利于大城市TFP的提升;（2）融入人力资本分层集聚及其与交通基础设施的交互作用同样促进作用显著,并且有利于大城市TFP的提升,而不利于中小城市的TFP的提升;（3）经济越发达,交通基础设施对区域全要素生产率的促进作用越明显;（4）信息化水平与交通基础设施替代作用明显,中小城市的替代作用更强。     

层状灰岩各向异性力学特征及声发射演化试验分析

为研究层状岩体力学强度的各向异性特征,室内钻取7种不同层理倾角灰岩样,进行单轴压缩试验,并辅以声发射监测.试验结果表明:随着层理倾角增加,灰岩单轴抗压强度呈现先减小后增大的"V"形特征,在层理倾角为45°时达到最小值;以45°为界,45°以前,声发射能量累计曲线有两个明显台阶,在0.3σp(σp为峰值强度)与0.7σp两个点存在激增现象,45°及以后,声发射能量累计曲线呈锯齿状增加,无明显台阶;声发射b值以45°为界,45°以前整体呈下降趋势,在中间存在升高并保持一段台阶,45°及以后,呈"V"形,最低点出现在0.6σp度左右.     

浅谈岩土工程勘察报告的编写工作

岩土工程勘察报告是建筑地基基础设计和施工的重要依据。在保证外业和土工化验资料准确可靠的基础上,文字报告和有关图表应按合理的程序编制。要重视现场编录、原位测试和实验资料检查校核,使之相互吻合,相互印证。地基岩土分层是一个重要环节,要根据岩土地质时代、土的成因类型、岩土性质、状态、岩石风化程度和物理力学指标合理划分。岩土的工程力学性质是根据原位测试和实验资料的数理统计值综合判定。报告要充分搜集利用相关的工程地质资料,做到内容齐全,论据充足,重点突出,正确评价建筑场地条件、地基岩土条件和特殊问题,为工程设计和施工提供合理适用的建议。     

Policy metaphors: From the tuberculosis crusade to the obesity apocalypse

In this paper we examine the conceptual and political work that metaphors do, with particular regard to how they construct problems and thus in turn limit the range of solutions.¹ Common metaphors in the United States, Canada, the United Kingdom and Australia are examined (war, disease and crime metaphors, and the economy and nation as a body) by analysing historical and modern texts about the policy issues of tuberculosis, immigration, asylum seeking, welfare, obesity and food insecurity. Through this we show that metaphors, in conjunction with discourses, may work to: naturalise and privilege certain constructions of problems; attribute blame and responsibility; support claims about the urgency and extent of required intervention (and who should deliver it, to whom and how); influence the identification and consideration of solutions by constructing the problem in particular ways; intentionally or unintentionally result in stigmatisation and non-trivial discrimination (social and workplace); and erase or highlight the role of actors, processes, social relations and systems. Vallis has developed the analysis, the bulk of the paper, and Inayatullah has articulated the theoretical links to causal layered analaysis (CLA). While there are multiple ways to use CLA, in this paper we use CLA to map a number of issues accross perspectives and frames, and to deconstruct creating the possibility for alternative futures. We do not explore alternative or preferred futures.     

关于生产无磷助洗剂δ-层状结晶二硅酸钠产品的可行性分析

介绍了新一代无磷助洗剂层状结晶二硅酸纳的产品概况 ,并做了市场及在国内工业化生产的可行性分析     

Time in the New Economy: The Impact of the Interaction of Individual and Structural Temporalities on Job Satisfaction

The 24/7 economy creates new organizational temporalities including a temporal structure called layered‐task time (LTT), characterized by greater simultaneity, fragmentation, contamination, and constraint. This paper develops a measure of LTT, and examines the relationship between its components and job satisfaction as moderated by an individual's polychronicity, or propensity for multitasking. A total of 306 employees from various jobs, organizations, and industries were surveyed. The LTT measures provide promising initial evidence of reliability and content validity. We also find that those who are more polychronic are more satisfied in environments characterized by a need for multitasking and using dissimilar skills, as well as organizational temporal constraint and unpredictable shifts in temporal boundaries. Finally, we discuss implications for research on temporal structures in the workplace.