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Search Results: 1 - 10 of 433271 matches for " <br>刘鑫 "
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基于公理设计的项目质量目标传递研究
Research of Project Quality Target Transfer Based on Axiomatic Design
 [PDF]


Service Science and Management (SSEM) , 2015, DOI: 10.12677/SSEM.2015.44B007
Abstract:

为揭示项目质量目标的传递规律,本文将公理设计理论引入质量管理中,对项目质量目标分解及其传递进行研究。本文从公理设计的角度出发,构建了基于公理设计理论的项目质量目标传递模型,模型主要包括质量目标单元定义、质量目标分解和形成、质量目标单元间目标传递。运用公理设计特有的Z字形映射,根据顾客质量目标、质量功能目标与质量设计目标之间的转化关系,建立了项目质量背景下的目标传递模型。
Purpose of this study is to reveal the transfer pattern of project quality target and to establish its decomposition model. Based on the theory of axiomatic design, the route of quality target transmission is given. What is more, the decomposition and formation mechanism of the quality target unit is also established. Through the conversion of customer quality target, quality functional target, and the conversion of quality functional target and quality design target by Axiomatic Design, the transfer model of quality target is established.

前瞻性货币政策的微观传导机制有效吗*——来自中国上市企业资产负债表的证据
IS FORWARDLOOKING MONETARY POLICY EFFECTIVE——Evidence from Balance Sheets of Listed Companies in China

,韬、#br#
- , 2018,
Abstract: 摘要 本文根据新古典资本需求理论和实际余额效应理论建立了一个包含投资需求和投资效率的前瞻性泰勒规则模型,并构造了一个反映企业投融资需求状况的企业综合状况指数,将其引入扩展的前瞻性泰勒规则模型,然后从宏观和行业两个层面对加入企业综合状况指数的前瞻性泰勒规则进行了检验和比较。研究发现:(1)前瞻性利率传导的企业资产负债表渠道基本有效,短期名义利率对于超过80%行业的企业综合状况指数缺口的反应系数显著,但对不同行业的反应差异较大;(2)短期利率对企业综合状况的反应系数较小,而对通胀缺口和产出缺口的反应系数相对较高,显示货币当局调整利率可能更多的是针对通胀缺口和产出缺口反应;(3)货币政策对资产价格“反应不足”,其对股价的反应系数非常小,对房价的反应系数不显著。
Abstract: Based on the neoclassical capital demand theory and the real balance effect theory,this paper establishes a forwardlooking Taylors Rule model which contains demand and efficiency of investment,and constructs an integrated conditions index reacting on corporate balance sheets which is introduced to the forwardlooking Taylors Rule model,then tests and compares the forwardlooking Taylors rule which contains integrated conditions index from the macro level and industry levelIt finds out as followsFirst,the forwardlooking interest rate transmission channel of corporate balance sheet is almost effective,the reaction coefficients of shortterm nominal interest rates responding on integrated conditions index gap of over 80% of overall industry are significant,but differences of coefficients of response on different industries are largeSecond,the reaction coefficients of monetary policy responding on integrated conditions index gap are small,but the reaction coefficients of shortterm nominal interest rates responding on inflation gap and output gap are relatively high,which indicates the monetary authority to adjust interest rates is likely to more respond on inflation gap and the output gapThird,the response of monetary policy on asset prices is “inadequate”,the reaction coefficients of monetary policy responding on stock price are very small,and the reaction coefficients of monetary policy responding on stock price are not significant
Nonlinear finite element buckling analysis of tubing with weight in constant-curvature wells
等曲率井中有重钻柱屈曲的非线性有限元分析

Liu Feng,Wang Xinwei,<br>,
力学学报 , 2005,
Abstract: The equilibrium equations and the potential energy function of tubing buckling with weight in constant-curvature wells are derived. The buckling process of tubing with weight in constant-curvature wells is then analyzed by finite element method. The clear definitions of the critical load for sinusoidal and helical buckling are given. The effects of gravity, top deviation angle and curvature of the wells on the buckling behaviors are considered in the analyses. It is shown that with the increase of the load, the buckling first occurs at the lower portion of the tubing where the axial load is largest, then the buckling spreads upwards and finally entire buckling of the tubing occurs. The buckling displacement, the contact force of the wells and the bending moment of the tubing vary periodically. The gravity of tubing strongly weakens the buckling of the tubing whose effects cannot be neglected. The larger the curvature of the wells and the top deviation angle are, the weaker the buckling of the tubing is.
Fractal compressive sensing for high-dimension signal recovery
分形压缩感知高维信号重构方法

Liu Jixin,Sun Quansen,<br>,孙权森
中国图象图形学报 , 2012,
Abstract: In the research field of digital signal processing,compressive sensing(CS) becomes more and more important because it changes the traditional signal processing method based on Shannon’s sampling theorem.Under the CS framework,signal recovery is a key point to obtain the digital termination product.The basis pursuit(BP) algorithm seems the most fundamental method of CS recovery,which is essentially an L1-norm minimization problem.However,BP can not be used for the signals with more than one dimension.Therefore,this paper presents a new high-dimension CS recovery method based on fractal dimension theory.The Minkowski dimension is used to replace the L1-norm as an object function in CS recovery.The visualization and SNR of our experimental results show that fractal CS recovery not only inherits the advantage of BP but also improves the dimensional extensive property.
企业价值观管理体系的构建及其作用机制——基于A.O.史密斯公司的案例研究
Construction of Enterprise Value Management System and Exploration of the Mechanism of the System——Case Study Based on A.O. Smith

,杨东涛<br>LIU Xin,YANG Dongtao
- , 2015,
Abstract: 摘要 运用探索性单案例研究的方法,以A.O.史密斯公司为研究对象,旨在构建企业的价值观管理体系并解释其作用机理。研究结果发现,企业的价值观管理体系主要由CEO及各级领导的示范、要求、反复教导,以“价值观”为主线的耦合对接的人力资源管理实践和内部监督机制三大板块构成,并在总体上呈现出自上而下、逐级外推的涓滴效应。此外,价值观管理体系的主要管理实践通过社会角色、从众,服从和说服等社会影响机制实现员工与组织的价值观一致性。研究成果能为企业界进行有效的价值观管理实践提供系统指导。
In this study,we take A.O. Smith as the subject and use single exploratory case study to construct an enterprise value management system and explain the mechanism of the system. The study finds that the enterprise value management system mainly consists of three parts. Specifically, they are demonstration, requirement and repeated teaching of the CEO and leaders at all levels, coupling human resource practices around values and internal oversight mechanism. The system runs mainly according to the trickle-down model. In addition, the main management practices of the system achieve the goal of value congruence through social influence, such as social roles, conformity, obedience and persuasion. The results provide a systematic guidance for enterprises to conduct effective value management
认知无线电带宽频谱感知性能分析及优化
Optimization and Performance Analysis for Bandwidth Spectrum Sensing in Cognitive Radio

, 仲伟志<br>LIU Xin, ZHONG Weizhi
- , 2015,
Abstract: 摘要: 为了降低认知无线电中主用户受到的干扰,根据主用户状态的变化,通过将通信带宽分为感知频带和传输频带,建立了次用户在整个帧周期内进行带宽频谱感知的模型.该模型中,次用户在每个帧使用部分带宽进行频谱感知,其余的带宽传输数据.在限制主用户受到的干扰和次用户虚警概率的基础上,通过联合优化感知带宽比和检测概率,最大化次用户的频谱效率.使用MATLAB软件仿真模型的干扰概率和频谱效率,结果表明:相比传统的时间频谱感知,当虚警概率为0.5时,带宽频谱感知能够使主用户受到干扰的概率降低30%;当干扰概率为0.2时,带宽频谱感知能够使次用户的频谱效率提高0.3 (bit/s)/Hz.
Abstract: To decrease interference to primary user (PU) in cognitive radio (CR), a bandwidth spectrum sensing model of secondary user (SU) over the whole frame was built through dividing the communication bandwidth into sensing frequency band and transmission frequency band, according to the status variation of PU. In this model, SU uses part of the bandwidth to perform spectrum sensing and the rest to transmit data in a frame. Subject to the constraints of the interference to PU and the false alarm probability of SU, the spectrum efficiency of SU was maximized through jointly optimizing sensing bandwidth proportion and detection probability. Using the MATLAB software to simulate the interference probability and the spectrum efficiency, it is found that compared to the conventional time spectrum sensing, the bandwidth spectrum sensing decreases the interference probability to PU by 30% with the false alarm probability of 0.5, and improves the spectrum efficiency of SU by 0.3 (bit/s)/Hz with the interference probability of 0.2
基于EAHP的多式联运路径选择研究
Study on Multi-Transportation Path Selection Based on EAHP
 [PDF]

,
Management Science and Engineering (MSE) , 2014, DOI: 10.12677/MSE.2014.33010
Abstract:
多式联运的路径选择是关系到物流成本和运输时间的关键性问题。本文综合考虑影响多式联运路径选择的各种因素,将定性分析和定量分析相结合,利用改进的可拓层次分析法(EAHP),构建可拓层次分析模型,同时通过专家偏好度来简化计算,从而得到满意的多式联运路径方案。
The choice of approaches to the multi-transportation is a crucial problem associated with the lo-gistics cost and the transportation time. This article comprehensively concerns the factors that in-fluence the multimodal transportation choice. With the method of the combination of the qualita-tive analysis and the quantitative analysis, adding the improved utilization of the Extension Ana-lytic Hierarchy Process Method (EAPH), EAHP mode can be constructed. Meanwhile, by means of the simplified calculation of the expert preference simplified calculation, the satisfactory multimodal transportation scheme can be achieved.
转轴角加速度测量及其USB数据采集
,
重庆大学学报 , 2007, DOI: 10.11835/j.issn.1000-582X.2007.09.008
Abstract: 转轴角加速度是旋转机构转动时的一项重要参数,旋转体的角加速度在实践中有着广泛和重要的应用.对角加速度的测量原理、方法进行了研究,寻求一种高精度连续测量角加速度可行的方法.设计了基于AT09S8515单片机和PDIUSBD12接口控制器件的USB数据采集设备.利用的单片机AT09S8515具有自动捕获信号上升或下降沿的功能,为转速信号的周期测量提供了方便.
路基工程优化模型

系统工程理论与实践 , 1991,
Abstract: 道路路基优化设计的关键问题在于三个方面:一是DTM的产生及精度;二是建立确切的数学模型;三是寻求合适的优化方法。文中针对道路路基工程的性质和特点,给出了以变坡点设计标高为优化变量、路基土石方工程费为目标函数的数学模型。它适应于铁路、公路及河道设计的可行性研究和初步设计阶段。
探索中小专业出版社的改革与发展之路——基于中航传媒的实践经验

科技与出版 , 2012,
Abstract: 基于对出版传媒业当前形势的三个判断,从强化专业出版、优化企业管理、资本化运作3个方面总结了改革与发展的成果,在此基础上谈了自己的体会。
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