Research on The Legal System of Mandatory Dividend of Listed Corporation in China

在我国资本市场转型的特定阶段，当上市公司内部难以自发形成良好的分红机制时，便需要从外部规制措施上入手，实施强制分红制度。通过对强制分红制度的合理运用，一方面可以保障中小投资者的合法权益，另一方面可以对公司内部分红行为加以引导，加速其自发形成良性分红机制。 除引言和结语外，全文分为四章。 第一章主要论述了我国上市公司分红现状及存在的问题。我国上市公司不容乐观的分红现状是内部治理机制的缺失和外部规制措施的乏力共同造成的，并且存在“控股股东掌控了公司分红政策”、“缺乏有效的救济措施”以及“配套税收体制不完善”三个主要问题。 第二章对强制分红制度进行了深入的理论分析，明确了强制分红制度的定义，论...In the specific stage of the transformation of the capital market, when the listing corporation is difficult to form a spontaneously sharing mechanism, we need to start from the external regulatory measures, and implement a mandatory dividend system. By the rational use of the mandatory dividend system, it on the one hand can protect the right of return on assets of minority shareholders, on the o...学位：法律硕士院系专业：法学院_法律硕士学号：1302013115025

饱和砂土的断裂现象研究

当饱和砂土层液化后,可能发生不均匀渗流,导致砂土中断层的形成,从而为滑坡提供了滑动面。对饱和砂土中的断裂(或称作水层)现象进行了分析,结果表明,只有当砂土层中某处被堵塞不能渗流且该状态一直保持时,才有稳定的断层,否则断层会逐渐消失。同时,对分析结果与试验结果进行了对照

Sediment-water Flux and Processes of Nutrients and Gaseous Nitrogen Release in a China River Reservoir

以九龙江北溪西陂电站库区为例,于2013年不同季节开展原状泥柱静态培养、气态氮水柱剖面观测和通量模拟实验,结合水和沉积物理化参数和微生物参数,研究河流库区沉积物-水界面营养盐及气态氮的释放过程和通量.结果表明,库区沉积物nH+4和PO3-4总体表现为释放行为[平均nH+4通量(480±675)Mg·(M2·d)-1,平均PO3-4通量(4.56±0.54)Mg·(M2·d)-1],而nO-3和nO-2表现为吸附行为.洪水季节带来大量的有机质沉积在库区,造成枯水期沉积物无机氮磷向上覆水体释放.湖泊区气态氮释放以n2为主(>98%),沉积物-水界面n2释放通量平均为(15.8±12.5)Mg·(M2·d)-1.水柱n2净增量有明显的空间差异和垂向分布规律,受沉积物-水界面生地化过程(反硝化和厌氧氨氧化作用)和流动水团的综合影响.下游站位存在较强的硝化作用,n2O相对富集,主要受水中氨氮占无机氮的比例控制.The key processes and fluxes of nutrients( N and P) and gaseous N( N2 and N2O) across the sediment-water interface in a river reservoir( Xipi) of the Jiulong River watershed in southeast China were studied.Intact core sediment incubation of nutrients exchange,in-situ observation and lab incubation of excess dissolved N2 and N2O( products of nitrification,denitrification and Anammox),and determination of physiochemical and microbe parameters were carried out in 2013 for three representative sites along the lacustrine zone of the reservoir.Results showed that ammonium and phosphate were generally released from sediment to overlying water [with averaged fluxes of N( 479.8 ± 675.4) mg·( m2·d)- 1and P( 4.56 ± 0.54) mg·( m2·d)- 1],while nitrate and nitrite diffused into the sediment.Flood events in the wet season could introduce a large amount of particulate organic matter that would be trapped by the dam reservoir,resulting in the high release fluxes of ammonium and phosphate observed in the following low-flow season.No clear spatial variation of sediment nutrient release was found in the lacustrine zone of the reservoir.Gaseous N release was dominated by excess dissolved N2( 98% of total),and the N2 flux from sediment was( 15.8 ± 12.5) mg·( m2·d)- 1.There was a longitudinal and vertical variation of excess dissolved N2,reflecting the combined results of denitrification and Anammox occurring in anoxic sediment and fluvial transport.Nitrification mainly occurred in the lower lacustrine zone,and the enrichment of N2 O was likely regulated by the ratio of ammonium to DIN in water.国家自然科学基金项目(41076042;41376082); 中央高校基本科研业务费专项(2012121053); 中国科学院城市环境与健康重点实验室(城市环境研究所)开放基金项目(KLUEH201008

LARGE-SCALE EXPOSITION PLANNING AND MANAGEMENT OPTIMIZATION BASED ON VISITORS' BEHAVIOR SIMULATION:A CASE STUDY of QINGDAO INTERNATIONAL HORTICULTURAL EXPOSITION 2014

2014年青岛世园会参观人次众多,需要对参观者行为进行模拟分析,以保证活动安全,提升游客体验。研究提出了通过行为模拟支持规划评价、预警及对策的技术框架。利用路径调查与陈述偏好调查获得参观者行为数据并建立模型,进而在多个情景下对个体行游轨迹进行了模拟仿真,分析预测了参观者排队、密度等参数的时空分布情况。在针对不同类型的评价对象提出各自评价指标的基础上,从模拟结果中辨识可能存在的问题,并从规划与管理两方面提出预警及优化对策。研究证明了对大型展会活动开展参观者行为模拟的技术框架的可行性,其结果对本次世园会具有一定的实践指导意义。It is necessary to simulate visitors' behavior in Qingdao International Horticultural Exposition 2014 for security and high-quality visitor experience due to the huge estimated pedestrian volume.This paper proposes a technical framework in purpose of supporting the assessment, early warning as well as countermeasures based on behavior simulation.Visitors' activity data are collected through a route choice survey and the informants' reported preference, based on which the behavior models are estimated.Visitors' trajectories under several scenarios are simulated, together with the spatio-temporal distributions of visitors' density and queuing behaviors.Criteria are proposed to evaluate each simulated object, based on which indexes are set up, used to identify problems that are likely to happen in the real exposition.In the end, the paper proposes early warnings and countermeasures of both planning and administration.The simulation framework is demonstrated to be feasible and valuable for the exposition.国家自然科学基金项目“基于行为分析的商业综合体空间优化方法研究”的部分成

振动载荷下饱和砂土中液化区的演化特性

考察了振动载荷下饱和砂土液化区演化的特性。结果表明,砂土骨架强度越低,结构越松,外载强度越大,渗透性越小,液化区发展越快,且范围越大,土内部各处的响应存在相位差

基于均衡学习的增强哈希桶模型研究

在使用哈希查找表构造IEEE 802.1Q协议中VLAN（虚拟局域网）网桥定义的过滤数据库时,哈希桶常被用于解决多个关键字对应同一个存储地址而造成的"哈希冲突"。传统哈希桶通过唯一的哈希地址获取整个学习表的资源,效率较低。文章提出了一种改进哈希表冲突的优化方法,通过双哈希桶和溢出桶来构造哈希表,并采用均衡学习的方式进行地址学习操作。该方法在双哈希桶溢出的情况下,将溢出条目暂存到溢出桶,并通知软件完成双哈希桶中冲突条目的释放和溢出桶中溢出条目的搬移操作。仿真实验结果表明,新的哈希算法可以有效减少哈希冲突的发生率,提高哈希表存储空间的利用率

泥石流的启动分析

分析了由于振动或冲刷等动载荷引起散体堆积物的液化或流态化而导致的泥石流。 据此， 认为这是在小坡角(10°以内)条件下泥石流形成的主要原因

功能化金属有机骨架材料中CO_2/N_2吸附分离的理论研究

金属有机骨架材料作为高比表面积、高孔隙率以及孔径尺寸可调的多孔材料,是一种极具潜力的CO_2物理吸附剂。本文构建了-H、-F、-Cl、-NH2官能团功能化修饰的金属有机骨架kgm-1结构,通过巨正则蒙特卡罗模拟方法研究了不同压强下功能化修饰的金属有机骨架中CO_2/N2吸附与分离行为,结果发现:CO_2和N_2的吸附量随着压强的升高而增加,功能化修饰对CO_2吸附量的影响明显大于对N2吸附量的影响。在kgm-1-H、kgm-1-F、kgm-1-Cl、kgm-1-NH_2四种构型中,-F修饰可以显著提高kgm-1的CO_2吸附量,并提高CO_2/N2的选择吸附比;功能化修饰后的选择性顺序遵循kgm-1-F> kgm-1-H> kgm-1-Cl>kgm-1-NH_2。通过气体分子-骨架间的相互作用力分析发现,骨架材料吸附气体分子主要是依靠骨架-气体分子间范德华力,极性官能团的引入明显提高了气体分子-骨架之间的相互作用力,尤其对于极性较强的CO_2吸附,因此也提高了CO_2/N2混合气体的选择吸附比。本文凸显了功能化效应对CO_2/N2吸附与分离性能的影响,同时也为碳捕获与封存技术中吸附剂材料的设计与筛选提供了理论依据

Numerical simulation on solid-liquid two-phase flow in cross fractures

This paper presents a series of numerical simulation on solid-liquid two-phase flow in cross fractures based on the Two-Fluid Model and the kinetic theory of granular flow (KTGF). First, the model is validated by previous experimental data. Second, the dimensionless controlling parameters are derived to describe the particle-laden flow in cross fractures, including the angle between the main and branch slots (bypass angle) theta, inlet particle volume fraction alpha(s0), the ratio of particle size to branch slot width d(s)/w(b), the Archimedes number Ar and the Reynolds number Re. Third, the effects of the dimensionless parameters are investigated. The results show that particles tend to accumulate at the intersection between the main slot and the branch slot. Larger bypass angle between the main slot and branch slot leads to less particle&#39;s flow into the branch slot. The distance of the branch fracture from the inlet of the main fracture induces different particle-flow characteristics into the branch slot. Particle volume fraction at the stable stage increases with the decrease of d(s)/w(b). The deposition thickness of particles increases with the increase of the inlet volume fraction and Ar number, while decreases with the increase of Re number. (C) 2018 Elsevier Ltd. All rights reserved.</p