224 research outputs found

    论先合同过错责任

    Get PDF

    针对新型寿险现金价值的反洗钱问题研究

    Get PDF
    从我国寿险产品创新概况出发,研究了洗钱活动的操作手法,并借鉴国际上较为成熟的经验来完善和健全我国保险业的反洗钱机制

    和亲剧的性别文化解读

    Get PDF

    大长径比筒形透明注塑件浇口设计与优化

    Get PDF
    分析了典型大长径比筒形透明注塑件—PMMA握把结构的工艺特点,设计了中心进胶爪形浇口,并利用Moldflow软件对其尺寸进行了优化分析,解决了此类塑件常出现的熔接痕、偏心等缺陷,为此类产品的模具设计提供了典型例证

    束缚和异氟烷麻醉对大鼠心率变异性及HPA轴影响的比较

    Get PDF
    目的为了观察束缚固定和异氟烷(流量:0.8 L,浓度:1.5%)麻醉状态中大鼠的心率变异性的变化;并通过比较9天每天30 min束缚干预和异氟烷麻醉对大鼠的体重、痛阈以及与HPA轴相关激素的影响,来评估长期使用异氟烷麻醉和束缚固定对大鼠应激程度的影响,选择更适宜的大鼠固定方法,为基础医学的实验方法提供重要的参考。方法 SD大鼠随机分为3组:空白组,束缚组,异氟烷麻醉组。急性实验通过记录大鼠心电图15 min,观察束缚固定和异氟烷麻醉情况下大鼠心率,心率变异性的变化。慢性实验中比较连续干预9天(30 min/d)前后3组大鼠体重、痛阈变化以及与应激状态相关激素含量的变化。结果 1)急性试验:与空白组大鼠相比,束缚干预和异氟烷麻醉均造成大鼠心率显著增加,具有统计学意义(P 0.05)。结论以上结果提示:低浓度的异氟烷造成麻醉中大鼠心率增加,心率变异性下降,产生以交感兴奋为主的自主神经功能状态改变。多次束缚固定易造成大鼠HPA轴激活,产生慢性应激的效应。在长期需要固定动物的实验中,与束缚固定相比异氟烷麻醉是更好的固定方法。国家自然科学基金(81674083

    STUDY ON THE LITFSI-BASED ELECTROLYTES FOR Li/MnO_2 BATTERIES

    Get PDF
    为改善lI/MnO2电池的低温放电性能,制备了一系列新型lITfSI系电解液,并且溶剂中加入适量乙酸甲酯.研究结果表明,电解液lITfSI(1 MOl/l)/PC∶dME∶EC∶MA是一种较好的体系.To improve the discharge performance of Li/MnO2 batteries at low temperatures,a series of new LiTFSI-based electrolytes were prepared.The methyl acetate was added into the mixed solvent.The experiments indicate that the LiTFSI(1 mol/L)PC∶DME∶EC∶MA(1∶1∶1∶3) is a good electrolyte

    军队院校专业学位研究生教育发展战略研究

    Get PDF
    从历史发展的角度,运用比较和实证研究的方法,对军队院校专业学位研究生教育目前存在的问题及其产生的原因进行了分析。最后以这些分析为基础,从军队和军队院校建设的全局角度,对军队院校专业学位研究生教育面向未来的发展战略提出了建议。学位与研究生教育“十一五”国家级课题《我国学位与研究生教育学科专业目录体系结构、功能定位和管理机制研究》(课题编号:W2,合同号:06w0206a);; 湖南省2006年学位与研究生教育教学改革重点研究课题《工程硕士研究生培养模式创新研究》(项目编号:06A01)的资助

    Optimum Design of Die Casting Die for Aluminum Alloy Microscope Arm

    Get PDF
    针对L形窄长铝合金显微镜立臂,安装孔多,位置精度高和要求外观表面一次成形不再后续加工等特点,采用CAE模拟分析技术,优化压铸工艺及模具结构,实现低成本制造模具,小吨位压铸机上安装大尺寸模具。并解决了试模中出现的局部裂纹、表面流痕和抽芯过程中铸件易翻转等问题。经批量生产验证,该模具工作稳定可靠,铸件质量达到要求。CAE analysis was applied for optimizing the die casting process & die structure to meet the requirement of precision assembling of its many fixed holes and one-step forming of its surface for the narrow & long microscope arm.Finally the die was manufactured with low cost successfully on a small tonnage die casting machine completely free of cracks,flowing marks or casting overturn that occurred during the trial test.The die functioned steadily with castings of required quality in volume production.福建省教育厅科技计划项目(JB05269);; 福建省自然科学基金项目(2007J0170

    Road Dust Loading and Chemical Composition at Major Cities in Fujian Province

    Get PDF
    采集并分析了福建省重点城市厦门、漳州、泉州和莆田城区具有代表性的57个地面扬尘和16个土壤样品的26种无机元素、8种水溶性离子和碳成分等组成.不同城市粒径≤100μM的路面尘负荷平均值在6.99 g.M-2与10.11 g.M-2之间,而粒径≤2.5μM的路面尘(PM2.5)负荷平均值在4.0 Mg.M-2和12.5 Mg.M-2之间.不同城市土壤尘和路面尘PM2.5中浓度最高的元素都是SI、CA、Al、fE和k,路面尘中CA元素明显富集,而主要人为来源的重金属元素如Cu、Pb、zn、Cr在路面尘PM2.5中的浓度显著高于土壤尘.漳州城区路面尘PM2.5中二次离子nH4+、nO3-和SO24-的含量明显高于其它地区,厦门、漳州和泉州城区路面尘PM2.5中Mg2+和CA2+之间都存在显著的正相关关系.四城市路面尘中有机碳(OC)的含量均高于济南、石家庄以及北京地面扬尘OC的含量,元素碳(EC)的含量均低于北京地区路面扬尘EC的含量.泉州和莆田两地OC和EC的相关性较好,说明路面尘中OC和EC有相同或相似的来源.质量平衡结果显示泉州和莆田路面尘PM2.5中含量最高的是土壤尘,其次为有机物.按化学组成特征对路面尘PM2.5进行聚类解析,得到受大气沉降影响、受土壤尘影响、受大气沉降和土壤尘共同作用以及受土壤尘和建筑尘共同作用4类样品.A total of 57 road dust and 16 urban soil samples were collected from four cities,Xiamen,Zhangzhou,Quanzhou and Putian in Fujian Province,China.Twenty-six elements,eight water soluble ions,organic carbon and elemental carbon in the fraction of particulate diameter less than 2.5 μm(PM2.5) derived through a suspension chamber were analyzed.The average loading of road dust with diameter less than 100 μm in the four cities ranged from 6.99 g·m-2 to 10.11 g·m-2,while the loading of PM2.5 ranged from 4.0 mg·m-2 to 12.5 mg·m-2.Both the soil and road dust samples were characterized with much higher concentrations of Si,Ca,Al,Fe and K.But for the anthropogenic elements such as Cu,Pb,Zn,Cr and Ti,much lower levels were found in the soil PM2.5 than those in the road dust PM2.5.Significantly higher levels of NH+4,NO-3 and SO2-4 were found in the road dust PM2.5 from Zhangzhou in comparison with those from other cities in this study.The calcium ion(Ca2+) content was significantly positively correlated with the Mg2+ content in the road dust PM2.5 from Xiamen,Zhangzhou and Quanzhou.The levels of organic carbon(OC) in the road dust PM2.5 in these four cities were higher than those reported in Ji'nan,Shijiazhuang and Beijing while the levels of elemental carbon(EC) were all lower than those in the urban road dust from Beijing,Significant positive correlation between EC and OC was found in samples from Quanzhou and Putian,suggesting the same and/or similar sources.The result of mass balance indicated that higher percentage compositions were soil and OM in both Quanzhou and Putian.Based on the cluster analysis,the 57 road dust samples were divided into four types: influenced by atmospheric deposition,influenced by soil dust,influenced by atmospheric deposition and soil dust,and influenced by soil and construction dust.国家自然科学基金项目(40971257;41171365); 环境保护公益性行业科研专项(201009004); 福建省自然科学基金计划项目(2009J05106
    corecore