Constitutional Restrictions of Academic Freedom——The Consideration from A Comparative Perspective

内容摘要 作为基本人权的学术自由，其宪法限制其实具有相对性和具体性的特点。正如林来梵教授指出，在理解基本人权的界限时，我们不能泛泛而论人权的相对性或抽象的公共利益概念，而应针对具体的权利及其具体的情形做出具体的考虑。学术自由的内涵已然从传统意义上的防御国家侵害的自由，逐渐演变成了要求国家予以物质保障、制度保障的自由。其区分为防御权功能的学术自由与受益权功能的学术自由与客观价值秩序的学术自由三个部分。本文仅就学术自由防御权功能视角的宪法限制予以论述，而学术自由的防御权功能指，学术自由的主体要求国家不得予以侵犯的利益，否则该主体可以直接依据规定要求停止侵害。可知，防御权功能视角的学术自由大体指，...ABSTRACT As a basic right, the constitutional restrictions of academic freedom are characterized by relativity and specification. As Laifan Lin professor indicates, we could not talk about the relativity of basic rights or abstract public interests in generalities,should make a specific consideration in specific circumstances. The connotation of academic freedom has translated from the freedom of...学位：法学硕士院系专业：法学院法律系_宪法学和行政法学学号：1362008115065

传统还是现代:新生代农民工的婚恋现状

本文通过对江苏省武进市新生代农民工进行抽样问卷调查,初步明确了新生代农民工的婚恋现状。研究发现:1.新生代农民工的婚恋现状呈现一些现代性的特征,但仍然受传统婚恋模式的影响;2.新生代农民工群体内部存在明显的高未婚率的问题,但导致这种问题的原因是多方面的;3.新生代农民工生育意愿较弱,但具有较强的赡养意愿。厦门大学公共事务学院赞助的“新生代农民工的文化适应与身份认同”课题的部分研究成

Research on Three-phase UPS with Unbalanced Load

三相电压的对称输出是衡量交流电源性能的一个重要指标。提出了一种新型的三相UPS逆变器系统,利用Δ/Z0型变压器为三相不平衡负载造成的零序电流分量提供通路,再通过设计正、负序双PI控制器抑制不平衡负载中负序电压分量。从而解决零序电压和负序电压造成的三相电压不平衡问题,使该三相UPS逆变电源系统可带三相不平衡负载。试制一台60k VA的三相UPS样机,并给出实验结果。The balanced output of three-phase voltage is an important index to measure the function of alternating current.In order to obtain high-grade output voltage in the case where the load is out-off-balance, this paper analyzed the mechanism and result of threephase voltage caused by unbalanced load, and some existing solutions to solve this problem. A new three-phase UPS inverter system is also raised which use △ /ZO transformer to provide a current path for zero-sequence current that caused by three-phase unbalanced load. What's more, it controlled the component of negative sequence voltage in the unbalanced load by designing the doubled PI controller(of positive and negative sequence). In these ways it could solve the imbalance of three-phase voltage caused by Zero-sequence voltage and,making the three-phase UPS inverter system able to load the three-phase unbalanced load. A 60 k VA three-phase UPS prototypes was built and the results were given based on the experiments

网络社区的社会互动研究

信息时代,网络社区逐渐兴起,社会互动在网络社区呈现出新的特点。研究发现,网络社区的社会互动呈现出对传统社会互动形式的继承和发展的特点,对个人和社会都具有非常重要的作用。最后,本文还对如何正确引导网络舆论与集体行为进行了思考

新生代农民工的职业选择与职业流动——以福建省厦门市为例

本文通过对厦门市997名新生代农民工的问卷调查,对其职业选择和职业流动进行了考察和分析。研究结果发现:新生代农民工职业选择更加灵活,开始从制造业和建筑业逐步向服务业转移;新生代农民工的工作满意度并不高,职业流动频率相对较高,职业期望逐渐从“生存理性“向“发展理性“的方向转变。厦门大学公共事务学院赞助的“新生代农民工的文化适应与身份认同”课题的部分研究成

A Survey of the Theoretical and Empirical Researches on Momentum Strategies

Jegadeesh和Titm an(1993)发现惯性策略(mom entum strategy)即买入近期股价上涨的股票,卖出近期股价下跌的股票,这种利用历史信息的投资策略可以获得显著的超常收益。本文首先刻画了惯性策略的发展演变过程,然后评述了行为金融和有效市场学派在学术论战中所提出的立场观点、理论模型和实证证据,最后笔者回顾了国内在这一研究领域的最新进展。Jegadeesh and Titman(1993)documents that the momentum strategies of buying the stocks that have performed well in the past and selling the stocks that have performed poorly in the past generate significant positive returns.Supporters of both "efficient market hypothesis" and "behavioural finance" have developed a controversy on how to explain this phenomenon.This paper outlines the researches on momentum strategies,and then reviews the standpoints,theoretical models and empirical studies which have been proposed by "efficient market hypothesis"and "behavioural finance".Finally,we review the condition of the researche on momentum strategies in China

新生代农民工的社会流动惰距

通过对6名新生代农民工的集体访谈,对他们在社会流动的过程中存在的流动惰距问题进行了探讨,结果发现:新生代农民工的社会流动惰距表现为身份认同的困境、社会地位与经济地位的不一致、市民化进程缓慢和部分公民权利的缺失。厦门大学公共事务学院赞助的“新生代农民工的文化适应与身份认同”课题的部分研究成

Enrichment of Heavy Metals by Casuarina equisetifolia of Different Stand Ages

为认识木麻黄(Casuarina equisetifolia)防护林带重金属消减效应,利用电感耦合等离子体质谱(ICP-MS)测定了福建省平潭国有防护林场林龄分别为5,15,20,30年的木麻黄小枝、细根、凋落物及林地土壤中5种重金属(Cr、Cu、Zn、Cd和Pb)的含量.结果表明:平潭木麻黄林地土壤重金属Cr、Cu、Zn、Pb、Cd含量均低于福建省土壤和福建海岸带土壤的重金属含量背景值,未发现重金属污染;木麻黄Cr、Cd和Zn的平均含量高出普通植物的正常值范围,木麻黄中重金属含量依Zn>Cr>Pb>Cu>Cd顺序降低;木麻黄细根中的重金属含量最高,且细根对重金属的富集系数也最高;木麻黄对Cr、Cu、Zn、Cd的富集系数均大于1;木麻黄细根中Zn、Cu元素含量显著正相关;小枝对Cr、Cd和Pb,细根对Zn的富集系数均与林龄极显著正相关;木麻黄现存生物量中,Cr、Cu、Zn、Cd和Pb的现存储量分别为3.06~3.46 kg/hm2,1.14~1.57kg/hm2,11.67~12.57 kg/hm2,0.05~0.09 kg/hm2和0.45~1.84 kg/hm2,且主要存在于根和树干中;随着林龄的增加,木麻黄积累大量的重金属,并达到其峰值.综上所述,木麻黄防护林在防风固沙的同时,能够吸收富集大量的重金属,对海岸带的重金属污染具有明显的消减作用.Casuarina equisetifolia is the key species in the seashore shelter belt in Fujian Province.It is necessary to assess enrichment of heavy metals by C. equisetifolia.Concentrations of heavy metals,including Cr,Cu,Zn,Cd and Pb,in branchlet,fine root,litter and soil of C.equisetifolia in 4 ages( 5,15,20,30 a) were determined.There was no heavy metal pollution in the shelter belt soil. The results showed that the content of the heavy metals in C. equisetifolia could be ranked from high to low as Zn>Cr>Pb>Cu>Cd.The heavy metal content of the fine root was significantly higher than the other parts,and the concentration coefficient of the fine root was also the highest in C. equisetifolia.There was a significant positive correlation between the content of Zn and Cu in the fine root. The concentration coefficients of Cr,Cd,Pb in branchlet,and the concentration coefficient of Zn in the fine root were significantly correlated with stand age.Existing reserves of Cr,Cu,Zn,Cd and Pb were 3. 06-3. 46 kg / hm2,1. 14-1. 57 kg/hm2,11. 67-12. 57 kg/hm2,0. 05-0. 09 kg/hm2,0. 45-1. 84 kg/hm2. Heavy metals mainly existed in the root and trunk.C. equisetifolia had the capability of accumulating heavy metals during growth,and the potential to reduce heavy metal pollution.国家自然科学基金(41176090);; 国家科技支撑计划(2009BADB2B0302

媒体监督、政治关联与高管变更——中国的经验证据

本文研究媒体对政治关联高管行为的监督和约束作用。结果发现,并购绩效越差的公司,高管越容易被变更,但是,政治关联高管即使并购绩效差也较不容易被变更。进一步研究还发现,当媒体对并购事件的负面报道次数较多,或者当公司位于地方媒体监督功能较强的省份时,高管的政治关联背景并不能起到"护身符"的作用,他们并购败绩后被变更概率与非政治关联高管无显著差异。这说明,媒体监督这种非正式外部治理机制可以通过强大的社会舆论力量约束政治关联高管行为,从而提高上市公司治理水平

双亚苄基哌啶与蛋白酶体抑制剂对舌鳞癌细胞存活率和周期的影响

目的:探讨双亚苄基哌啶(Bis-Benzylidine Piperidon,RA190)与蛋白酶体抑制剂MG132对舌鳞癌细胞活率和周期的影响。方法:分别培养舌鳞癌细胞CAL27、TCA8113。设无细胞空白组、无加药对照组和不同终浓度(0. 1,0. 2,0. 4,0. 5,0. 8,1. 6,3. 2,6. 4μg/m L) RA190或MG132实验组,培养24 h后,CCK8法酶标仪检测各组细胞存活率,流式细胞仪分析各组细胞周期分布情况。结果:相同浓度下,MG132组舌鳞癌细胞存活率低于RA190组(P<0. 05); MG132与RA190组CAL27细胞存活率均低于TCA8113细胞(P<0. 05); MG132组的CAL27细胞G2/M期数量占比高于对照组,差异均有统计学意义(P<0. 05)。结论:舌鳞癌细胞对MG132作用的敏感性高于RA190; CAL27细胞对MG132、RA190的敏感性高于TCA8113; MG132阻滞CAL27细胞于G2/M期,可能提高了CAL27细胞对MG132敏感性