601 research outputs found

    Preparation of a nano- and micro-fibrous decellularized scaffold seeded with autologous mesenchymal stem cells for inguinal hernia repair

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    疝气,是人体组织或腹内脏器离开原来正常部位通过人体间隙、腹壁上的缺损或薄弱位置,转移到其他部位。目前,临床上主要通过外科手术和人工补片来修补疝气,每年大约有50万人接受疝修补手术。大部分腹股沟疝能通过人使用工合成补片达到修复目的。腹股沟疝无张力修补术中应用不可降解聚合物补片以增强腹股沟腹壁薄弱区,虽然显著降低了传统腹股沟疝手术的复发率,但不可降解补片易使患者出现慢性疼痛、补片感染和精索损伤等并发症。基于前期研究,我们以羊主动脉为原材料,通过物理或化学的方法有效去除细胞、活性蛋白成分,从而有效降低材料的免疫原性,再经过冻干灭菌等工艺处理,制备出一种新型的脱细胞基质材料。脱细胞后的支架仅保留了胶原...A hernia is defined as the exit of viscera, such as the bowl, through the wall of the cavity or defects in which it normally resides. In clinic, artifial patches were abroadly used for the repairing of the defects which formed in patients abdominal wall. Hernia repair operations are among some of the most commonly performed surgical procedures with an estimate of 500 thousand laparotomies performe...学位:理学硕士院系专业:医学院_生理学学号:2452014115345

    Emission Inventory of Volatile Organic Compounds and Ozone Formation Potential in Fujian

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    近年来,随着福建地区经济快速发展,城市化进程不断加快,环境与经济发展的矛盾日益突出,臭氧浓度逐渐攀升。挥发性有机物是臭氧的主要前体物,对臭氧的生成及大气污染有着不可忽视的影响。本研究建立了福建省挥发性有机物排放清单,分析了挥发性有机物的排放特征及时空分布特点,并计算了臭氧生成潜势,为该地区空气质量改善提供了重要的基础数据。 本研究以福建省为研究对象,综合利用各类统计资料、结合福建省本地调研情况等,主要采用排放因子法,选取具有代表性的活动水平数据和排放因子,开发了福建省包括9个城市在内的2015年挥发性有机物排放清单。在此基础上,结合ArcGIS技术,对VOCs排放清单进行区县空间分配,得到排...In recent years, with the rapid economic development and accelerated progress of urbanization, the contradiction between environment and economy is increasingly prominent. Frequent ozone concentration exceeding have caused the deterioration of air quality. As the main precursor of ozone, VOCs have a negligible impact on the generation of ozone and air pollution. For better understanding of the cha...学位:理学硕士院系专业:环境与生态学院_环境科学学号:3312014115170

    Identifying with Heroes by Authority and Among the People in the Case of Hailing’s Death during the Opium War

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    海龄由于其不恰当的军事手段,导致矛盾激化,矛盾聚焦于海龄在京口的活动、死亡方式。围绕其死亡方式,各方争端不断,持续长久。争端方对此各执一词,镇江人利用流言否认海龄殉节,与官方直接对立。争端折射出官方与民间在认同上的差异。Hailing’s inopportune operation led to contradiction sharpened and accumulated. Hailing’s action and death caused heated debates for a long time. People in Zhenjiang didn’t agree to the authority’s view that Hailing sacrificed his life for the country. This disagreement reflects that the authority and the people had different views on hero

    Analyzing on changing patterns of reading and appraising the examination papers in the Ming Dynasty

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    明代科场评卷方式颇多争论,争论双方都各持一词,缺乏对影响科场评卷诸要素以及评阅过程的系统分析。由于评卷与录取是一个系统过程,在人为评阅过程中,评阅时间、评阅人员、评阅标准、试卷本身等都是制约评卷的因素,上述因素相互制约,不断变化,对评卷产生影响,进一步影响录取标准。There were much debate on patterns of reading and appraising the examinations papers.Both sides have their different version, but they are short of analyzing. Appraising and enrolling is a complicated system, in the artificial course of reading and appraising the examinations papers , no much time, complicated standard of appraising, too many subjects, shortage of examinees and so on. All that subjective and objective factors condition each other and change continuely ,influence appraising and admission criteria

    A Study of the Implementation of the New Enterprise Income Tax System since the “Merger of the Two Laws” - In the Case of Haicang District, Xiamen City, Fujian Province

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    2007年3月16日,十届全国人大第五次会议审议通过了新企业所得税法,并于2008年1月1日起实行。新法结束了中国多年来内外资企业所得税法并列运行的历史,对我国社会主义市场经济建设,促进改革开放具有深远的意义。它不仅旨为增强我国企业国际竞争力,也为在更高水平上吸引外资、公平各类企业税负创造有利条件。 时至今日,新企业所得税制度执行已有二年多的时间。新制度执行有没达到预期的目的,是本论文立足论证的问题。考虑到新制度实行时日不长,全国范围内的评估有待于用大量数字来进行说明,非我能力所及,因此,论文主要选作者所工作的区域——厦门海沧的相关数据,来进行这个问题的论证。 本论文由四部分构成: 第一...On March 16, 2007, the Fifth Session of the Tenth National People’s Congress passed a new enterprise income tax, which became effective on January 1, 2008. The new law put an end to the years of operation of two paralleled enterprise income taxes – one for enterprises with domestic investment and one for enterprises with foreign investment. The new legislation has had far-reaching implications for...学位:工商管理硕士院系专业:管理学院高级经理教育中心(EMBA项目)_财政学(含税收学)学号:X200715605

    On the provision of military supplies-focusing on the Livestock and grain in west line from 1729 to 1735

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    论文以清代西路军需作为研究对象,以粮食和牲畜为重点,运用历史学的实证法,兼以数据统计,考察雍正朝西路军需补给及河西驻军的军需补给。全文由绪论、正文和结语三大部分组成,正文又包括六章。绪论:界定研究对象“西路”、“军需”等概念,介绍了选题缘由及意义;回顾学术史;陈述运用的资料及研究方法。第一章:探讨雍正朝陕甘行政区划的变迁,气候状况及甘肃八府二州县的社会经济状况,雍正朝陕甘的粮食储备。第二章:将雍正朝河西和安西以西作为两大区域,以雍正朝为时段,考察雍正朝西路军事布防数量的变化。第三章:以具体的军需案为研究对象,分析雍正七年以后西路军需粮食需求的种类及数量,分析不同种类补给粮食的数量及区域分布;第...On the provision of military supplies —focusing on the Livestock and grain in west line from 1729 to1735 The paper by the Qing Dynasty west line military supplies took theresearch object, takeing the grain and the domestic animal as the keypoint, the utilization history study real diagnosis law, concurrently by the data statistics, inspects Yong Zheng the military suppliesmilitary supplies which ...学位:历史学博士院系专业:人文学院历史学系_中国古代史学号:B20040201

    Design and Implementation of Computer Monitoring System Using in Large-scale Hydropower Stations

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    水力资源占中国常规能源资源剩余可采储量的40%左右,是中国重要的能源资源。更重要的是水电是可再生的清洁能源,对于保护全球大气环境,实现可持续发展具有重要作用。在优先发展水电是必须坚持的能源发展方针的思想指导下,我国大型水电基地和流域水电开发的步伐正在加快。在此形式下大型水电站的自动化系统建设也变得越来越重要。水电站计算机监控系统是大型水电站的自动化系统的重要组成部分,因此当前对水电站计算机监控系统的设计开发越来越引起专家和学者们的重视。 随着计算机软件、硬件、工业控制、通信网络等方面新技术的迅速发展,为水电站计算机监控系统的发展提供了有力的支持。为实现“无人值班”(少人职守)创造了良好的技术...Hydraulic resource that is about 40 percent of available conventional energy of remaining reserves is the important energy resources in China. It is more important that the hydropower is the reproductive, clean energy for the protection of the global atmospheric environment and its continuous development. Based on the development of hydropower is prior to others, the large bases of hydropower and ...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201023020

    两岸四地创新型人才战略合作与中华区域自主创新发展研究

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    创新型人才在国家自主创新过程中起着决定性作用。分析了两岸四地(中国内地、中国香港、中国澳门、中国台湾)的创新型人才战略,发现两岸四地在人才结构、产业、教育、科技等方面互补性较强,通过人才交流、教育合作、科技合作等措施加强两岸四地的创新型人才战略合作,对两岸四地均有益处,最终有利于促进中华区域的自主创新。国家社会科学基金项目(11BJY003); 教育部人文社会科学基金项目(10YJA790253); 福建省软科学基金项目(2011R068
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