129 research outputs found

    以习近平新时代中国特色社会主义经济思想引领新时代经济发展——中国经济规律研究会第28届年会综述

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    为贯彻党的十九大精神,深入学习习近平新时代中国特色社会主义经济思想,进一步推动中国特色社会主义政治经济学的发展创新,中国经济规律研究会第28届年会暨习近平新时代中国特色社会主义经济思想研讨会,于2018年4月21日~22日在四川大学隆重召开。此次会议由中国经济规律研究会和四川大学主办,四川大学经济学院、四川大学中国特色社会主义政治经济学研究中心承办,《马克思主义研究》编辑部、中国社会科学院经济社会发展研究中心协办。四川大学副校长晏世经教授出席并致辞,中国

    PCI术后患者抗血小板治疗方案的药物经济学评价

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    目的从医疗保险角度,对经皮冠脉支架置入(percutaneous coronary intervention,PCI)术后3种抗血小板药物治疗方案进行经济学评价。方法 3种治疗方案为在使用阿司匹林基础上,经验性给予国产氯吡格雷,或经验性给予替格瑞洛,或根据CYP2C19基因型指导选择国产氯吡格雷或替格瑞洛,由此建立决策树模型并进行成本效果分析,预测该3种方案避免主要心血管事件的发生率以及成本,研究时间为1年。结果经验性给予国产氯吡格雷联合阿司匹林治疗方案为成本最低方案,但直接给予替格瑞洛联合阿司匹林治疗方案的经济性最好。结论对于PCI术后的患者,最推荐直接采用替格瑞洛联合阿司匹林的治疗方案

    财经媒体地域偏见实证研究

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    本文结合心理学和社会学的理论分析,从地域差异的宏观视角来解释媒体偏见产生的可能根源,其逻辑在于:一方面,我国经济、制度、文化建设存在明显的地域差异性,媒体在裁剪新闻时很容易对这种社会真实产生框架依赖,在报道时会不自觉地贴上地域标签;另一方面,地域差异的长期存在会形成社会的刻板印象,逐渐固化成一种社会规范,并产生强大的社会压力,而媒体会遵从这种压力,从而在报道时呈现出地域性偏见。本文以2004—2014年期间来自我国八家主流财经媒体的203860份新闻报道为研究样本,所展开的一系列实证结果表明:我国媒体在新闻报道时存在着显著的地域偏见。具体而言,相比其它地域,对于地处经济发展水平较高,或制度建设较为完善,或社会信任程度较高的地域的上市公司,媒体会给予更多的正面报道。这一结论让我们看到媒体偏见形成背后特殊的地缘因素和宏观背景,即便在同一个国家内,区域的分割也会深刻地影响到媒体的报道行为。国家自然科学基金项目(71472161;7179060171672158);;中央高校基本科研业务费专项资金(20720181005)的资

    三种湿地植物抗寒性的初步研究

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    在阶段性降温条件下,研究了三种常用湿地植物黄鸢尾(Iris pseudacorus L.)、花菖蒲(Iris ensata Thunb.)及水芹(Oenabthe javanica)叶片抗寒性相关生理指标(可溶性蛋白质含量、可溶性糖含量、游离脯氨酸含量、丙二醛含量、超氧化物歧化酶活性、过氧化物酶活性、过氧化氢酶活性以及细胞质膜相对透性)的变化。结果表明,冷锻炼使湿地植物通过对抗氧化酶活性及渗透性的调节来提高其机体的抗寒性。低温条件下,黄鸢尾的抗氧化酶活性显著增加,5℃时SOD活性是初始值的5.77倍;花菖蒲保持较高的CAT活性,5℃时其CAT活性是黄鸢尾CAT活性的8.95倍,是水芹CAT活性的3.77倍;水芹叶片中脯氨酸含量明显提高,温度和脯氨酸含量呈负相关(R=-0.755,P=0.050)。综合比较各项生理指标可以得到这三种湿地植物的耐寒性大小顺序依次为:黄鸢尾>花菖蒲>水芹

    Acoustic Emission Warning Signals Change Law Research during Deformation and Failure of Gassy Coal Rock

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    为提高矿井瓦斯突出灾害预测准确率,基于力学、声学理论,采用实验室试验方法,以标准煤试样为研究对象,对含瓦斯煤岩变形破裂过程声发射(AE)预警声信号变化规律进行研究。试验结果表明:围岩应力增大,煤岩破裂由低围岩应力的脆性破坏逐渐过渡到高围岩应力状态的塑性破坏,可根据声发射高幅信号提前预测煤岩破裂时刻。瓦斯的力学和非力学作用对煤岩体力学性质和变形特性的影响均随瓦斯压力的增加而变大。瓦斯压力越大,则煤岩破裂进程加快,积累的声发射能量迅速释放,高值振铃计数声发射信号覆盖时间区段变长,声发射信号能及时反映含瓦斯煤岩的不稳定性

    Large Scale Numerical Simulations For Multi-Phase Fluid Dynamics With Moving Interfaces

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    This short communication presents our recent studies to implement numerical simulations for multi-phase flows on top-ranked supercomputer systems with distributed memory architecture. The numerical model is designed so as to make full use of the capacity of the hardware. Satisfactory scalability in terms of both the parallel speed-up rate and the size of the problem has been obtained on two high rank systems with massively parallel processors, the Earth Simulator (Earth simulator research center, Yokohama Kanagawa, Japan) and the TSUBAME (Tokyo Institute of Technology, Tokyo, Japan) supercomputers

    Phytoplankton community structures revealed by pigment signatures in Norwegian and Greenland Seas in summer 2012

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    对2012年中国第5次北极科学考察期间的挪威海和格陵兰海两个断面的光合色素进行了高效液相色谱(HPlC)分级分析,通过藻类色素化学分类分析软件(CHEMTAX)获得了不同浮游植物类群对叶绿素A的贡献,进而得到该海域表层和次表层(30 M)的浮游植物群落结构。结果表明:表层总叶绿素A的浓度为23.59 ng/l,低于次表层的30.38 ng/l,其中浮游植物根据粒径划分对总叶绿素A的贡献由高到低依次是微型浮游植物、小型浮游植物和微微型浮游植物。该海域同时存在葱绿叶绿素(PrASInO)、墨角藻黄素(fuCO)、别藻黄素(AllO)、多甲藻素(PErId)、玉米黄素(zEA)、19-丁墨甲藻黄素(19'bf)和19-六已墨甲藻黄素(19'Hf)等色素,其浓度和分布与温盐和营养盐等环境因子存在一定的相关性。不同粒径浮游植物色素组成显示,微微型浮游植物群落中以S型定鞭藻(28%)、n型定鞭藻(21%)、硅藻(18%)和青绿藻(12%)占优;微型浮游植物群落的优势类群为S型定鞭藻(53%)、n型定鞭藻(20%)和硅藻(12%);而小型浮游植物群落主要为硅藻(63%)和甲藻(17%)。Composition of phytoplankton controlled not only the formation of the Food Chain,but also the efficiency of energy transfer.At the same time,phytoplankton influenced the distribution of nutrient and the sedimentation of organic particulate matter.So study of phytoplankton community structures plays an important role in understanding the ecological function of phytoplankton.Photosynthetic pigments needed by photosynthesis,are very good biomarkers.They can be used to research and characterize phytoplankton community structure.Norwegian and Greenland Seas which are influenced by the Arctic water with low temperature and salinity and Atlantic water with high temperature and salinity.Understanding of correlation between environmental factors and phytoplankton community structure,is important for understanding the community structure of the marine organisms and their ecological function.During the 5thChinese Arctic Research Expedition in summer 2012,we analyze the photosynthetic pigments fromNorwegian and Greenland Seas by HPLC.Contributions of different phytoplankton assemblages to Chlorophyll a were obtained by Chemical Taxonomy( CHEMTAX),and thus resulted in composition of the phytoplankton community structure at the surface and subsurface water( about 30 m depth).The result showed that average concentration of Chlorophyll a at surface water was 23.59 ng / L,lower than that at upper water( 30.38 ng / L).The contributions of phytoplankton to Chlorophyll a were nano-> micro-> pico-one.Prasinoxanthin,Fucoxanthin,Alloxanthoxyletin,Peridinin,Zeaxanthin,19'-but-fucoxanthin,19-hexanoyloxyfucoxanthin were observed in the waters.Their distributions were relative to environmental factors,including Nutrients,temperature and salinity.These photosynthetic pigments showed negative correlations with temperature and salinity.Whereas they showed positive relations with nutrients,including NO-2,NO-3,SiO3 2-and PO3-4.The correlations of different phytoplankton and environmental factors were different.Diatoms had a very significant positive correlation with SiO3 2-,but had no correlation with PO3-4,NO-2and NO-3; Haptophytes-N had significant positive correlations with PO3-4,NO-2and NO-3; Haptophytes-S also had a positive correlation with PO3-4,but had no correlation with NO-2and NO-3.The maximum values of these photosynthetic pigments,except for Zea and Fuco,existed in the subsurface of the section BB.The distribution and concentration of photosynthetic pigments could explain the distribution and abundance of the phytoplankton to some extent.Not only because the pigments are complex and multiple,but also because there are inevitable errors in the testing and sampling,we cant determine the existence and abundance of the phytoplankton.So we use the CHEMTAX to obtain the contributions of different phytoplankton assemblages to Chlorophyll a,and thus resulted in composition of phytoplankton community structure.The composition of phytoplankton showed that Haptophytes-S( 28%), Haptophytes-N( 21%),Diatoms( 18%),and Prasinophytes( 12%) were main assemblages in the picoplankton; the main composition of nanophytoplankton were Haptophytes-S( 53%),Haptophytes-N( 20%),and Diatoms( 12%); meanwhile, Diatoms( 63%) dominated the microphytoplankton,followed by Dinoflagellates( 17%).Haptophytes-S,Haptophytes-N and Diatoms were dominant species in the surface and subsurface of section BB and AT belonging to the Norwegian and Greenland Sea.If Fucoxanthins and Diatomss existence in picophytoplankton could explain the tendency of phytoplankton to micro and miniaturization,these still need to be more sufficient evidence.国家自然科学基金(41076130;41206189); 南北极环境综合考察与评价专项(CHINARE2011-2015

    一种上行垂直流人工湿地耦合微生物电解池强化脱氮的方法及装置

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    本发明公开了一种上行垂直流人工湿地耦合微生物电解池强化脱氮的方法及装置,步骤:A、由系统底部均匀布水,废水首先沿底部非导电填料层呈推流式上升;B、废水流入阳极导电填料层;C、接着废水流入非导电填料隔离层,为阴极导电填料层和阳极导电填料层之间分隔器;D、废水流入阴极导电填料层,硝酸盐氮得到自养反硝化去除;E、废水经上部非导电填料层内排水管流出。阳极导电填料层分别与非导电填料隔离层、底部非导电填料层相连,阴极导电填料层分别与上部非导电填料层、非导电填料隔离层相连,阴极集电极和阳极集电极分别放置在阴极导电填料层及阳极导电填料层内。操作简单,大幅度提高上行垂直流人工湿地对低碳高硝氮这类废水的去除效能。</p

    马铃薯遗传转化系统的优化及禽流感病毒(H5N1)基因的导入

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    通过对以马铃薯 (Solanum tuberosum L .)块茎为受体的农杆菌转化系统进行优化 ,筛选出使三个品种 (鲁引 1号、克新 3号、优金 )的受体均可得到高频分化的培养基 :MS+2 .0 mg/L BA+3.0mg/L ZT+0 .5mg/L NAA+0 .5mg/L GA.对几种农杆菌转化条件的比较研究发现 ,菌体用 Ms+0 .5mg/L GA液体重悬并稀释 4倍 ,与受体于 2 8℃ ,10 0 r/min振荡侵染 2 0~ 30 min,共培养时在分化培养基上加 30 μ mol/L AS(乙酰丁香酮 ) ,16 h弱光照共培养 3d,可使马铃薯品种鲁引 1号的转化效率较常规方法提高 5~ 7倍 .将禽流感病毒 (H5N1)基因与 35S启动子及 nos终止子构建表达载体 p130 1H5N1,直接法转入农杆菌 EHA10 5,用此菌株转化马铃薯得到再生植株 .基因组总 DNA经 PCR和 Southern杂交证明目的基因已整合到马铃薯基因组

    Legal Research on the Interlocking Share-Holding of Corporations (ISOC)

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    公司相互持股作为企业结合的一种有效方式,已经引起我国经济界、法律界乃至全社会的密切关注和高度重视。公司相互持股研究作为一项崭新的课题,是我国《公司法》修改必然会涉及到的内容之一。如何规制公司相互持股成为近几年来国内法学界热烈讨论的话题。本论文立足我国实践,并结合世界各国尤其是日本对公司相互持股规制的立法经验,对我国公司相互持股法律规制所涉及到的问题进行研究。本论文由前言、正文、结束语和后记等部分组成。正文部分分为三章,主要内容如下: 第一章从公司相互持股的基本理论入手,主要介绍了公司相互持股的定义、类型及其产生的原因,并对公司相互持股的正负效应进行分析,作为全文论述的理论铺垫。 第二章对国...Interlocking share-holding of corporations (ISOC) has been drawing great attention both from economic circle and jurisprudential circle, which is one of effective way of corporation combination and is a must-be focus in amending of the Corporation Law. How to regulate ISOC has been a hot topic in the jurisprudential circle. Intending to deal with the problem faced in the regulation of ISOC, the au...学位:法律硕士院系专业:法学院法律系_法律硕士(JM)学号:20010810
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