2,588 research outputs found
Research of Online Musie Product Supply Chain Contract Coordination
数字技术的进步和互联网的渗透,带动了传统的音乐产业颠覆性的变革,数字化形态的在线音乐产品正在逐步取代传统音乐产品的地位,广泛影响着人们的生活。在线音乐产品全新的市场特性使在线音乐产品的相关企业面临的现实环境更加富有挑战性,进而企业与企业之间对决的战线拉长,企业与企业之间的竞争开始上升到供应链与供应链之间的竞争。 本文以在线音乐产品供应链作为研究对象,基于传统的供应链契约协调理论,分析在单曲收费模式和广告分账模式下的在线音乐产品供应链契约的有效性和合理性。 本文首先综述了有关学者对供应链契约协调理论的研究;然后在传统的实体产品供应链契约的基础上,根据在线音乐产品的特点,对供应链契约运用于在线...The progress of digital technology and the penetration of Internet have led the traditional music industry to undergo a disruptive change. Online music product, which is in the digital form, is gradually taking the place of traditional music product and has great influence on people's lives. The new market characteristics of online music product have made the actual environment faced with related ...学位:管理学硕士院系专业:管理学院_技术经济及管理学号:1772006115139
Design and Implementation of Equipment Management Information System for an Enterprise
目前我国的设备资产管理存在各种问题,管理水平极为不平衡,总体上信息化程度不高,管理上较为落后。集团企业希望能够了解整个公司的资产真实运作情况,掌握公司资产的运行、维修、维护和费用情况,实现企业资产财务和实物的账实相符;明确资产使用权、管理权、所有权单位的相关职责和权利,实现资产全生命周期内设备的运行、维护、维修过程全面追踪;实现资产合理调配,盘活资产存量、及时处置闲置资产,使资产价值能实现最大化;通过基础数据的收集为资产配置的标准化和运维费用的标准化提供决策依据,实现资产全生命周期过程中设备资产的全面追踪。 本文对于集团型企业中管理层人员的设备管理需求和设备管理过程中出现的问题,根据企业设备...In our country,asset management exist at present various problems, such as information technology coverage is not high, the management of different companies big difference, the larger the gap between the company, the management of the main means of manual management is lagging behind. Managers want to know the real operation of all assets, operational control of company assets, repair, maintenanc...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323035
A Research of the Cultural Marketing for LiShizhen Medicine Group Co.Ltd.
进入21世纪以来,我国经济快速发展,人均收入持续增长,人们的医疗保健意识不断增强;与此同时,我国逐渐进入老龄化社会。在这些因素的综合影响下,近几年来,我国医药产业发展迅速,其中西医西药占了医药产业大多数。与西医西药相比,中药在治疗方面往往见效慢、疗程长、服用不方便,而很多人不了解中医药,甚至持排斥心理。中药生产企业必须改变人们排斥、甚至歧视中医药的观点,需要进行了文化营销。 作为市场竞争主体的李时珍医药集团有限责任公司(下文中简称:李时珍医药集团)的外部经济环境、行业环境和内部资源条件等诸多方面都发生着日新月异的变化。面对逐渐扩大的产业规模和不利的公众偏见,如何抓住发展机遇、改变公众观念,已...Since the 21st century, China's rapid economic development, per capita income continues to grow, people's health care awareness is growing; At the same time, China has gradually entered the aging society. Under the influence of these factors, in recent years, China's pharmaceutical industry has developed rapidly, of which Western medicine accounted for most of the pharmaceutical industry. Compared...学位:工商管理硕士院系专业:管理学院_工商管理硕士(高级管理人员工商管理硕士)学号:X201015614
Studies of melanopsin in the mudskipper Boleophthalmus pectinirostris
大弹涂鱼(Boleophthalmuspectinirostris)是生活于潮间带淤泥滩涂的一种两栖鱼类。课题组前期研究表明,雌性大弹涂鱼生殖群体在繁殖季节出现半月周期的产卵现象,血清中的性类固醇激素、褪黑素、间脑中的褪黑素受体亚型基因mtnr1a1.4和卵巢中的褪黑素受体亚型基因mtnr1a1.7也具有明显的半月周期变化节律,并且半月周期峰值出现的时间与产卵时间基本一致。为了进一步了解大弹涂鱼黑视蛋白与褪黑素以及半月周期产卵习性的关系,本文采用分子生物学等方法克隆了大弹涂鱼四种黑视蛋白基因亚型(opn4m1、opn4m3、opn4x1、opn4x2),研究了其在不同组织、日周期、半月周期和不...The burrow-dwelling species of the mudskipper Boleophthalmus pectinirostris is widely distributed in the marine intertidal regions. In our previous study, during the spawning season, the female mudskipper stock exhibits a semilunar spawning pattern, variations of plasma steroid hormones, melatonin, melatonin recepter genes of mtnr1a1.4 in the diencephalon and mtnr1a1.7 in the ovary, were synchroni...学位:理学硕士院系专业:海洋与地球学院_海洋生物学学号:2232014115136
Research on Inertial/Celestial Navigation System Algorithm
导航系统由于其任务和应用环境的特殊性,对于系统的可靠性和精度均提出较高的要求,单一的导航系统模式无法满足所需的要求,而惯性导航(INS)与天文导航(CNS)分别存在某些不足,二者组合使用可利用优势构成性能更好的高精度组合导航系统。为此,本文将主要以单一导航研究为基础展开对惯性/天文组合导航分析,针对系统的误差进行算法讨论和修正建模,提出可应用于譬如深海、沙漠、深山等特殊环境下长航时导航定姿、定位的惯性/天文组合导航方案。 本文首先针对单一导航系统不同导航方法分析研究了误差模型及主要影响因素,分别单独建立了惯性导航以及天文导航的误差模型,以此为基础,惯性导航部分分析了卡尔曼滤波法并建立数学编排...Because of the particularity of its task and application environment, the navigation system model cannot meet the required requirements for the reliability and precision of the system. The inertial navigation system (INS) and the celestial navigation system (CNS) have their own advantages and disadvantages, and their combination can give full play to their advantages, constitute a strong autonomy ...学位:工程硕士院系专业:航空航天学院_工程硕士(控制工程)学号:2322014115337
Design and Implementation of Student Information Management System for a University
随着计算机技术和网络技术的发展及应用,传统的手工信息管理模式已经不能适应现代学生信息管理的要求。本课题主要是结合目前高校学生的实际情况,考虑到不同的用户对学生信息管理系统的实际需求,建立一套基于B/S模式的高校学生信息管理系统。本文着重阐述学生信息管理系统的设计与开发整个流程和过程。 本系统设置了三种用户权限,不同权限内的用户拥有不同的功能:一是学生用户,能对个人信息进行修改和查询操作,并能修改登录密码,查询个人的所有档案信息;二是档案管理员,能对学生的各种档案信息进行添加、删除、修改和查询操作,其他的用户只能查看个人的档案信息,其中档案信息包括学生学术水平、学生学习能力水平、学生基本个人信...With the development and application of computer and network technology, the traditional isolated information management model has far unable to adapt to modern student information management requirements. This paper is mainly based on the actual situation of college students, taking into account the actual needs of different users of the students’ information management system, the establishment ...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201223074
Bayesian Inference for Nonlinear DSGE Model via Multiple-try Metropolis Algorithm
本文提出一种改进的多重尝试Metropolis算法,用于非线性动态随机一般均衡模型的贝叶斯参数估计和模型选择。多重尝试策略通过每次迭代抽取多个尝试点的方法来提高算法的混合速率,新方法中提出使用近似的方法提高计算速度,并通过接收概率调整偏差。数值实验表明新方法在相同的计算时间内具有更高的估计效率。最后,本文比较了具有不同货币政策设定的模型对中国经济数据的拟合效果,发现中国数据更加支持具有时变通胀目标的模型。This paper proposes a multiple-try-based Metropolis algorithm for Bayesian parameter estimation and model selection in nonlinear dynamic stochastic general equilibrium( DSGE) models. Multiple-try method generates multiple trial points in each iteration to achieve faster mixing rate. The new approach proposes to use approximation to save computational cost,the approximation bias is adjusted through the acceptance rate. Simulation results demonstrate effectiveness of the proposed algorithm. The algorithm is applied to estimate DSGE models with different monetary policy settings using the macroeconomic data of China. It shows that the data favors the model with time-varying inflation target.国家自然科学基金项目“状态空间模型参数的高效序贯蒙特卡洛估计及在金融中的应用”(11101341)的资
Studies on the plasmon-enhanced second-harmonic generation from Ag-ZnO hybrid system
金属纳米结构同非线性材料相结合的杂化体系已经被应用到全光开关、光学成像、生物传感等方面。尽管基于杂化体系的非线性效应近年来被广泛关注,但依旧存在许多亟待解决的问题。如由于纳米结构自身的尺寸特征,使得能够用于产生二次谐波的激发能量的利用率降低;非线性材料只有部分在表面等离激元效应的增强区域内,即二者的空间上的叠加较小,无法达到对信号的充分放大。与此同时,通过定性研究杂化体系的非线性信号强度与非线性材料之间的关系,对于提高杂化体系的信号增强能力具有重要的科学意义和实用价值。针对上述问题,我们对特定的金属纳米结构/非线性材料体系的二次谐波特性展开了研究。 本论文共分为四个部分。绪论部分介绍了等离激...Hybrid nanostructures, which combine nonlinear dielectrics with plasmonics metals, are of fundamental importance for enormous applications ranging from all-optical switching to imaging or bio-sensing. Though nonlinear effects based on hybrid nanostructures have caused broad attention from researchers, there are still many unsolved major scientific issues. For example, because of dimension characte...学位:工程硕士院系专业:物理科学与技术学院_工程硕士(电子与通信工程)学号:1982013115299
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