Intensive Study of Concord Century’s Transformation Strategy Starting financial Analysis

首长宝佳集团有限公司（以下简称首长宝佳）于1992年在香港联合交易所上市，早期从事以矿物、金属、铜及黄铜材料贸易为主的包括电线加工、物业投资业务在内的多元化经营活动。随着首钢集团和香港长江实业集团的入驻，1994年该公司做出重大决策，调整主营业务进入钢帘线制造业，曾一度占据国内市场前三甲的地位。 中国的钢帘线生产企业随着其下游的轮胎和汽车制造业的大发展，也经历了从高速成长到产能过剩的过程，首长宝佳并没有在高速发展的市场中做大做强，反而在市场低迷时公司业绩大幅下滑。 本文从首长宝佳的股东权益回报率这一指标入手，通过一系列财务指标的纵向分析，并将其与竞争对手相关指标进行横向对比，从多维度观察这...Shougang Concord Century Holdings Limited was listed in Hong Kong Ex-changes and Clearing Limited in 1992. Its principal business activities covered trading of metallic ores, metals, copper and brass products as well as processing of electrical wires and property investment. 1994 significant decision was made by the company management to switch its core business into steel cord producing after S...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）_高级管理人员工商管理硕士(EMBA)学号：X200915611

“经济人假说”:争论与超越——兼论中国经济学的创建

“经济人假说”是当前西方主流经济学最核心的理论基础。然而 ,这一假说并不是一成不变和为所有的经济学家都能接受的。一方面 ,这一假说在逻辑上是处于不断的发展之中的 ,这形成了主流经济学的发展演化 ;另一方面 ,对这一假说的背离 ,又形成了各种非主流经济学流派。不可否认 ,“经济人假说”本身是有缺陷的 ,正视这种缺陷并努力把经济学建立在更加坚实的基础之上 ,是经济学理论创新的现实途径。在创建中国经济学的过程中 ,需要对“经济人假说”作出选择 ,从理论建设的角度看 ,当前尚不具备构建中国经济学理论体系的条件 ,最要紧的还是多做一些基础性的准备工作 ,以期为中国经济学塑造出坚实的理论基

On the Pedagogy of Individual Teachers

流行的“教育学”文本不可信 ,不可爱。不可信是说“教育学”缺少逻辑的力量 ,不可爱是说“教育学”缺少写作者思想“教育”时显现的个体 ① 生命之光 (思想作为动词 )。本文从揭示“教育学”不可信、不可爱的命运入手 ,将拯救教育学的命运部分地交给与“教育”有着原初的亲缘关系的教师 ,因为教师的“师”不仅仅是“会计师”的“师” ,即不仅仅是专业人员 ,而且教师有可能是“儿童天国的引路人”[1 ] ,也可能是“儿童误入歧途的作俑者”。Popular pedagogy texts are both untrustworthy and absent of loveliness. The for mer indicates that it is lacking in logical power. The latter means that it does not show the sunshine of individual life of the write r who is thinking about education. This article aims to expose the untrustworthi ness and unloveliness of popular pedagogy and calls upon the emergence of a peda gogy of individual teacher

Stitching Measurement Technique for Large-aperture Aspheric Surface during Grinding Process

为实现对磨削加工阶段大口径非球面光学元件的精密测量,提出一种基于坐标测量的多段拼接综合优化数据处理模型。基于多体系统理论、最小二乘原理建立两段面形轮廓拼接数学模型;提出基于曲率原理和非球面方程最小二乘拟合的冗余数据剔除数学模型;建立多段拼接的综合优化处理模型;利用TAylOr HObSOn轮廓仪对口径为176 MM的非轴对称非球面光学元件的3条母线进行分段测量试验并通过文中提出的数学模型进行数据拼接处理,试验结果表明,拼接测量结果与单次测量结果相比,误差最大值的平均值为0.25μM,最小值的平均值为–0.22μM,比该光学元件的面形峰-谷值2.77μM高出一个数量级,达到检测要求。试验结果证明所提多段拼接综合优化数据处理模型的正确性及有效性,该模型可以进行工程应用。In order to test large-aperture aspheric surface optice element accurately during grinding process, a comprehensive optimization data processing model of stitching measurement is proposed based on coordinate measuring.Firstly, the stitching model for two segments of surface shape contour is built based on multi-body system theory and least square principle; secondly, the rejecting redundant data model is built based on curvature principle and least square fitting of aspheric equation; then the comprehensive optimization processing model for multiple segments stitching is built; three generatrices of a non-axisymmetry aspherical optical element whose aperture is 176 mm is stitching measured by Taylor Hobson profilometer and the data is processed by the model mentioned in the text.The results show that the maximum average error of the stitching measurement is 0.25 μm, and the minimum average error of the stitching measurement is –0.22 μm which is compared with the single measurement.The error is an order of magnitude higher than the surface shape peak–valley value 2.77 μm of the optic element, and matches the measurement requirements.The experimental results prove the correctness and effectiveness of the comprehensive optimization data processing model of stitching measurement, and the model can be applied in engineering.国家自然科学基金资助项目(51075343;51275433

Volumetric Error Modeling and Compensation of Precision Measuring Platform Based on Multi-system Theory

针对大口径光学元件精密检测平台的工作特点及影响其空间误差的各项几何误差因素,运用多体系统理论,用低序体阵列描述多体系统拓扑结构,建立一种空间误差数学模型。综合应用激光干涉仪、球杆仪和激光位移传感器等仪器设备,提出大口径光学元件精密检测平台各项几何误差和空间误差的测量方法,并对模型中所涉及的各项几何误差进行了系统分析和全面测量,对空间误差进行补偿。误差补偿实验证明所提模型正确有效,将空间误差从补偿前-70.01~22.14μM降低到补偿后-4.22~5.8μM,大大提高了精密检测平台的测量精度。A volumetric error model is proposed according to the working characteristics and the geometric errors of a large-size optical element precision measuring platform.The volumetric error model is based on multi-system theory,and the topological structures of the multi-system theory are described by the number arrays of low-order body.To testify the volumetric error model,a new combined measurement experiment by the application of laser interferometer,double-ball bar,laser displacement sensor and other relative instruments is conducted for measuring the geometric and volumetric errors of the measuring platform before and after error compensation.The error compensation experiments show that the volumetric error is reduced from -70.01 ~ 22.14 μm to -4.22 ~ 5.8 μm,which also reflects the validity of the volumetric error model.国家自然科学基金项目(51075343); 福建省自然科学基金项目(2012J05098

Evidence for Involvement of Unaffected Parietal Cortex in Brain Reorganization from Acute Stroke : A fMRI Study

目的:利用功能性磁共振成像(fMRI)技术探讨缺血性卒中急性期的脑功能重组特点。资料与方法:采用被动单指运动任务,对4例急性皮质下梗死患者和4名正常人进行fMRI研究,比较正常人与卒中患者之间以及每个卒中患者之间fMRI结果的异同。结果:正常人被动单指运动激活对侧感觉运动皮层(SMC)、后顶叶皮层(PPC)和双侧辅助运动区(SMA)。卒中患者健手运动fMRI结果基本同正常人; 患手运动时,除1例同(健)侧SMC、SMA、前运动皮层(PMC)激活外,4例均呈现出同侧PPC的激活。结论:首次应用fMRI技术采用恒定的被动刺激探讨卒中急性期患者运动恢复的神经机制,结果显示了正常人和脑卒中患者之间fMRI结果的显著差异,反映了卒中急性期脑功能的重组情况,也为卒中急性期健侧半球PPC中介运动恢复提供了新的实验依据

Brain imaging studies on motor recovery after stroke

近年来有研究从横向和纵向角度考察卒中后脑功能重组及其与运动恢复的关系。就脑卒中恢复的神经影像学研究进展进行综述 ,探讨损伤同侧及对侧半球在运动恢复中的作用

Vegetation carbon stocks and net primary productivity of the mangrove forests in Shenzhen,China

红树林是滨海湿地"蓝碳"的主要类型之一.准确和定位评估不同植物群落的固碳能力,对于红树林保育管理和恢复造林具有指导作用.本研究对深圳福田红树林4种代表性群落(白骨壤群落、秋茄群落、海桑群落、无瓣海桑群落)的各个植被碳库组分(乔木植物生物量碳库、林下灌丛碳库、呼吸根碳库、枯立木碳库、枯倒木碳库和枯枝落叶层碳库等)进行调查,计算各群落的植被碳储量,并通过生长增量-凋落物产量法计算得到各群落的净初级生产力.结果表明:白骨壤群落、秋茄群落、海桑群落和无瓣海桑群落的植被碳储量分别为28.7、127.6、100.1、73.6 t C·hm~(-2),各群落的净初级生产力分别为8.75、7.67、9.60、11.87 t C·hm~(-2)·a~(-1).位于深圳市中心的福田红树林,每年固定大气CO2高达4000 t.本研究结果将为红树林"蓝碳"碳汇功能的评估提供理论指导,并为我国红树林碳汇林建设提供依据.Mangroves are the most important coastal blue carbon sinks. The accurate estimation on the carbon sequestration capacity of plant communities would guide the mangrove conservation,afforestation and management. This study investigated the vegetation carbon stocks of dominant mangrove communities,which were Avicennia marina,Kandelia obovata,Sonneratia caseolaris,and Sonneratia apetala in Futian Nature Mangrove Reserve in Shenzhen,Guangdong Province of China.Vegetation carbon stock consisted of living trees( aboveground and belowground biomass),understory,pneumatophore,standing dead trees,fallen dead trees and litter in these communities. The net primary productivity( NPP) was calculated from the litterfall and incremental growth in the same year of each community. Our results showed that the vegetation carbon stocks for A. marina,K. obovata,S. caseolaris,and S. apetala communities were 28. 7,127. 6,100. 1,and 73. 6t C·hm~(-2),and the NPP were 8.75,7.67,9.60,and 11.8 t C·hm~(-2)·a~(-1),respectively. Therefore,acting as urban forests,Futian mangroves in Shenzhen assimilated about 4000 t CO2·a-1.These results provided guidance for mangrove blue carbon assessment,and theoretical basis for the construction of coastal carbon sequestration forests in China.国家自然科学基金项目(31270581);; 福建省自然科学基金项目(2013J01145);; 深圳城市管理局科研项目(201406)资助~