Chinese family firms and an analysis of their financial strategy

据资料显示，世界上大约80%的企业与家族有关。在美国和欧洲，早期的工业化是随着家族企业的兴起而发展起来的，当时的企业基本上都是家族式经营。即使在当代，世界各国的家族企业仍然是企业群体中数量最为庞大的部分，也是各国经济中最为活跃的成分。在美国家族企业也是经济的主导力量：75%以上的企业属于家族企业；上市公司中由家族控制的超过40%；家族企业占国民生产总值的40%；在《财富》500强企业中有超过1/3的企业可以被看作是家族企业；世界上最成功的一些企业就是从家族企业发展而来的，而且有的仍为创业的家族或是后来继承的家族控制着，如强生、福特、洛克菲勒、沃尔玛、杜邦、宝洁、摩托罗拉、惠普、迪斯尼等等。然而...Abstract According to statistics, about 80 percent of the firms all over the world are related to family. In America and Europe, early industrialization developed together with the uprising of the family firms when most of the firms were operated by family. Even in contemporary era, family firms are the biggest group among all the firms and the most active element in the economy as well. In the U...学位：博士后院系专业：管理学院工商管理教育中心_工商管理硕士(MBA)学号：BH1700002

拉格朗日追踪法在速凝浆液流动模拟中的应用

速凝水泥浆液黏度具有时变特性,流动过程中黏度时空分布不均匀。本研究通过实验测量速凝浆液的流变特性,建立该浆液的流变本构模型。考虑到速凝浆液物性参数随体变化,基于拉格朗日追踪方法,建立速凝浆液流动的数学模型。通过有限元数值模拟可以得到黏度,压力随时间变化的规律,对比数值结果与室内实验结果,验证该数学模型的适用性。对比传统方法,通过流量、压力、注浆能耗间的变化规律,验证了速凝浆液流动中采用拉格朗日追踪法描述流体物性参数随时间和空间变化的必要性。研究结果可为实际工程注浆参数的确定提供理论依据,也可为注浆工程的优化设计提供科学依据

宝黛相争 谁伴宝玉欧洲游?

部门经理应当如何处理公与私的矛盾?领导面对复杂的人际关系,应该采取何种处事原则?家族企业中的空降CEO,如何应对各种人事矛盾避免引火烧身

Numerical simulation of phosphorus release from resuspended sediment

One of the main issues in environmental hydraulics is pollutant release from sediments. For instance, the strong affinity between phosphorus and sediment permits most of the phosphorus to be adsorbed on the surface of the sediment particles in rivers or lakes. Post sediment resuspension, phosphorus is desorbed from the sediment to the overlying water. The release of phosphorus from the resuspended sediment is an important process in the secondary pollution of water. Herein, a coupled mechanical model of the overlying water, sediment, and pollutant was established based on the experimentally gathered data. Two types of sediment with different adsorption and desorption characteristics were selected to simulate the process of sediment resuspension and phosphorus release under different hydrodynamic conditions. The simulation results were subsequently used to analyze the relationship between the flow field characteristics and phosphorus concentration, from which the relationships between velocity, particle volume fraction, turbulent kinetic energy, total phosphorus concentration, desorbed phosphorus concentration, and time were elucidated. Based on the results, phosphorus is rapidly released into the overlying water from the resuspended sediment, and it reaches a peak value in a short duration. Unlike the release process of non-adsorption pollutants, hydrodynamic conditions and sediment properties play a crucial role in the phosphorus release process. The turbulent kinetic energy rapidly increases with the flow velocity, whereas the desorbed phosphorus concentration exhibits a certain relationship with the particle volume fraction and turbulent kinetic energy. In particular, the turbulent kinetic energy increases the desorbed phosphorus concentration per unit time. Additionally, the time taken by the total phosphorus concentration to attain its peak value is closely related to the characteristics of the flow field, whereas the amount of phosphorus is closely related to sediment properties. Post sediment resuspension, the release of phosphorus shows the characteristics of a centralized and massive release, which suggests that the total phosphorus concentration in the overlying water would change in a short duration and cause secondary pollution in the water environment

Improving reservoir permeability by electric pulse controllable shock wave

Controllable shock wave (CWS) parameters such as amplitude, operating area and number of operations are easy to control and have received extensive attention as a potential new technology for reservoir permeability enhancement. Based on the continuous-discontinuous element method (CDEM) and considering the coupling mechanism of reservoir deformation, failure, pore seepage and fracture flow, a multiphysical field coupling model of reservoir permeability enhancement under CWS is proposed. Under the fluid-solid coupling condition, the formation and development dynamic process of reservoir fractures are obtained, and the change of reservoir permeability is also obtained. The compression fracture zone, tensile fracture zone and undamaged zone are formed around the wellbore. After repeated impact, the number of fractures is more sensitive to tectonic stress, the fracture aperture is more sensitive to reservoir strength. Different from hydraulic fracturing, a large number of fractures in different directions will appear around the main fracture after repeated impact, forming a complex fracture network similar to spider web, which may be beneficial to improve reservoir permeability. The permeability of reservoirs with different tectonic stresses and strengths increases nonlinearly and monotonicly with repeated impacts. Based on CDEM, the change of reservoir permeability with tectonic stress, strength and impact times is obtained, which is a nonlinear monotonic three-dimensional relationship. Based on that relationship, the parameters of CWS can be controlled to predict the change of reservoir permeability, such as peak pressure, duration, impact times, etc. Therefore, it can optimize the reservoir fracturing scheme and improve the reservoir fracturing efficiency, which has considerable practical significance in engineering

Research on phosphorus release from resuspended sediment under wind-induced waves in shallow water

Sediment-water interfaces are important interfaces for lakes, which are related to most environmental and ecological problems. Wind-induced waves cause secondary pollution via sediment resuspension. Since the coupling mechanism of water, resuspended sediments, and phosphorus affects the release of phosphorus (P) near the interface, a coupled model was explored for two sediment types with different adsorption-desorption capabilities to examine sediment resuspension and P release. The relationships among wind speed, wave characteristics, sediment distribution and P concentration were obtained. For different sediments, the unit sediment desorption release is negatively correlated with wind speed. When sediments are resuspended under low or moderate wind speed, the P concentration in the overlying water increases abruptly, hampering diffusion. P release exhibits the characteristics of concentrated release in a small region and changes the water environment rapidly

车轮-地面耦合动力学行为的CDEM-DEM分析

越野车辆在软土路面上行驶时，其车轮-地面相互作用的动态力学行为极其复杂，车轮的下陷程度和通行能力均为车辆地面力学研究的重点。为探究车轮在软土路面通行时的动力学性能，本文提出了一种连续-非连续单元法（Continuous-discontinuous Element Method, CDEM）与颗粒离散元法（Discrete Element Method, DEM）相结合的耦合计算方法。该方法中，车轮采用CDEM单元进行描述，软土路面采用DEM颗粒进行描述，CDEM单元与DEM颗粒之间采用罚弹簧进行耦合，通过在车轮上施加动态扭矩，实现了车轮在软土路面上摩擦、滚动及前行过程的精确模拟。借助CDEM与DEM的耦合，探讨了车轮花纹、路障对车辆行驶过程中动力学行为的影响规律。研究结果表明：花纹车轮及光面车轮均在软土路面留下清晰可见的车辙；花纹轮胎较光面轮胎表现出更强的通行能力；花纹车轮转动速度较小，但其车轮平动速度远高于光面车轮，花纹车轮平动与其线速度之比约为12.78%，而光面车轮比值仅为2.80%；车轮在软土路面行驶过程中，相同质量下的光面车轮下陷深度远高于花纹车轮；车辆在含路障路面通行时，地面起伏度与车辆行驶能耗之间密切相关，起伏度越大，所需能量越大

一种模袋填充式锚固注奖装置和方法

本发明公开了一种模袋填充式锚固注浆装置，包括:孔口封孔钢管(1)、壁面花眼(2)、定压阻塞器A(3)、孔口封孔模袋(4)、注浆钢管(5)、定压阻塞器B(6)、加强筋(7)、孔底锚固钢管(8)、孔底锚固模袋(9)。本发明通过将锚杆分成孔口封孔钢管、注浆钢管、孔底锚固钢管三部分，并设置模袋、加强筋、壁面花眼，结合模袋注浆胀大、不宜漏浆等特点，实现了孔低的锚固和孔口的填充封闭；通过壁面花眼，实现水泥浆、凝固浆的有效注入松散围岩；从而，有效提高了注浆压力，快速填充了破碎带松散围岩，避免了注浆液被地下水冲蚀，最终形成坚固的模袋填充式锚杆，全面提高了工程质量和技术水平

Pension information comprehensive service platform

本发明公开了一种养老信息化综合服务平台，包括终端设备、数据管理模块、挖掘与推荐模块、服务设计与发布模块、用户与服务管理模块、用户表现模块以及对外数据接口；本发明将医疗机构、养老机构内及附近社区老年健康档案上传至“云端”，为机构内的老人、周边社区和家庭提供日常生活管理、健康咨询/管理、紧急救助等服务。解决了三大养老模式和医院封闭系统限制资源共享的问题，实现各养老服务平台在服务对象、信息及各类资源的无障碍流动，通过调整和整合实现养老服务供需上的长期平衡，从而实现居家、社区、养老院和医院养护医融合