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金属应力腐蚀开裂敏感性评定标准探讨
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作者 张兴超 刘志盈 《航天标准化》 2009年第3期13-16,共4页
通过对国内外金属应力腐蚀开裂敏感性的评定标准概述及评定指标分析,提出航天产品用金属应力腐蚀开裂敏感性的评定标准选择应注意的问题,并参照ECSS相关标准,给出应优选的评定标准。
关键词 金属材料 应力腐蚀开裂 敏感性评定 评定标准 航天产品
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催产素喷鼻对学龄期孤独症谱系障碍患者社会行为的影响 被引量:2
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作者 彭荣春 静进 韦朝霞 《广州医科大学学报》 2018年第3期44-47,共4页
目的:评价催产素喷鼻治疗对学龄期孤独症谱系障碍患者社会行为的影响及用药的安全性,为学龄期孤独症谱系障碍患者的药物治疗提供依据。方法:采用前瞻性、随机、双盲、安慰剂对照的研究方法,选取符合诊断标准的6-12岁孤独症谱系障碍患者4... 目的:评价催产素喷鼻治疗对学龄期孤独症谱系障碍患者社会行为的影响及用药的安全性,为学龄期孤独症谱系障碍患者的药物治疗提供依据。方法:采用前瞻性、随机、双盲、安慰剂对照的研究方法,选取符合诊断标准的6-12岁孤独症谱系障碍患者45例,随机分为安慰剂组(n=24)和催产素喷鼻治疗组(n=25)(8国际单位),每天2次为8周。分别在治疗前、治疗8周和12周时,检查催产素血药浓度、状态-特质焦虑量表(state-trait anxiety questionnaire,STAI)测试、emotion sensitivity,情绪敏感性评定(emotion sensitivity ratings),观察其他发展行为和社会认知的改变,记录催产素副作用。结果:催产素喷鼻治疗可改善情绪知觉,尤其可增加模糊的面孔的快乐情绪识别,可以帮助改善ASD的核心特征。对状态-焦虑状态无明显改善,对眼神读心实验无明显影响。催产素喷鼻可轻度增加催产素的血药浓度,但耐受性良好,治疗剂量未发现明显副作用。结论:催产素喷鼻可改善孤独症谱系障碍儿童部分社会行为异常,安全性高,值得尝试。 展开更多
关键词 社会认知催产素 孤独症谱系障碍状态-特质焦虑量表 情绪敏感性评定
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Reservoir-landslide Hazard Assessment Based on GIS: A Case Study in Wanzhou Section of the Three Gorges Reservoir 被引量:5
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作者 WANG Meng QIAO Jian-ping 《Journal of Mountain Science》 SCIE CSCD 2013年第6期1085-1096,共12页
Reservoir-landslide is mainly caused by changes in hydrodynamic conditions of slope interior at the time of water storage or discharge. The current study mainly focuses on the typical reservoirlandslide, but the sudde... Reservoir-landslide is mainly caused by changes in hydrodynamic conditions of slope interior at the time of water storage or discharge. The current study mainly focuses on the typical reservoirlandslide, but the sudden occurrence of some unknown landslides brought a lot of difficulties for hazards prevention. Therefore, we proposed a method to evaluate the regional scale reservoir-landslide hazard. We took Wanzhou section of Three Gorges Reservoir(China) as the study area and systemically and synthetically carried out the reservoir-landslide hazard evaluation under the condition of water level regulation. Firstly, we made reservoir-landslide susceptibility assessment by using the methods of spatial analysis and statistics based on geological and geomorphological materials and field survey data, and then, analyzed the regional-scale slope stability based on the infinite slope model used to analyze the bank slope stability change under the condition of water fluctuation, finally, developed a reservoir-landslide hazard evaluation model based on the results of susceptibility and stability. The hazard evaluation model was used to predict and evaluate the hazard change under the role of water level regulation. The results showed that the landslide hazard of the whole region decreased during water storage, landslide hazards increased during water discharge. The faster the regulation speed, the greater the slope hazard. The results can provide the basis for hazard management and regional land-use planning. 展开更多
关键词 Reservoir-landslide Hazards assessment
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Financial Valuation of Segment-Specific Marketing Activities and Market Segment Development
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作者 Heinz Eckart Klingelh6fer 《Journal of Modern Accounting and Auditing》 2012年第8期1140-1157,共18页
By applying methods of investment appraisal, this paper offers a financial approach for determining the optimal level of segment-specific marketing activities and market development under the conditions of imperfect m... By applying methods of investment appraisal, this paper offers a financial approach for determining the optimal level of segment-specific marketing activities and market development under the conditions of imperfect markets and uncertainty. Within the scope of marketing planning and controlling, the model is suited to optimizing an enterprise's market activities and taking interdependencies between market segments, production, and investments into account. Applying duality theory of linear programming allows for identifying the income determinants and deriving formulas for a correct valuation by using (corrected) net present values (NPVs). Under certain conditions, they can also be used to easily evaluate and financially interpret the effects of parameter changes. The author uses sensitivity analysis to support these findings and to obtain more information on the effects of these determinants. 展开更多
关键词 market segmentation market development financial valuation imperfect markets investment (corrected) net present value income determinant segment-specific activity duality theory sensitivity analysis market share BUDGET production
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