抛物型积分算子的弱型极限行为

设0≤βλ})=1α||?||q q||f||q L1(Rn),以及limλ→0+λqm({x∈Rn:Tα?,βf(x)-?(x)ρ(x)α-β||f||L1(Rn)>λ})=0,其中?满足Lqβ-Dini条件,当β=0时,还需满足∫Sn-1?(x′)J(x′)dσ(x′)=0.同时,给出了相应的抛物型极大奇异积分和Marcinkiewicz积分的弱型极限行为.此外,建立了关于Heisenberg群Hn上Hardy-Littlewood极大函数的相应结果.国家自然科学基金(批准号:11771358和11471041)资助项

Research on the Developing strategy of Xiamen Quanjiafu Foods Co. Ltd.

摘要 中国速冻食品行业是从上个世纪90年代中期以来飞速发展的“朝阳性”产业，随着经济发展、消费观念改变和技术提升以及中国城市化进程的加快，速冻食品市场必将拥有光明的前景。 近年来速冻食品行业正朝着规模化、品牌化和竞争的有序化方向发展，大企业凭借品牌知名度和技术更新能力日益蚕食着中小企业的高端市场，消费升级和城乡销售终端的超市化，更使中小企业赖以生存的中低档产品市场受到挤压。面对挑战，属于地区性中小企业的厦门全嘉福食品有限公司急需从战略角度考虑未来的发展方向。 本文运用战略管理理论，在内外部环境分析的基础上对全嘉福食品有限公司的发展战略进行研究并提出实施方案。 本文共分四部分：第一部分是...Abstract The quick-frozen food industry in China, which is called “the rising sun” industry, has developed rapidly since the middle of 1990s. Along with the development of Chinese economy, the changes in people’s concept of consumption and promotion in technology, as well as the rapid development in China’s urbanization and super-marketization, the quick-frozen food industry will surely en...学位：工商管理硕士院系专业：管理学院工商管理教育中心（MBA中心）_工商管理硕士(MBA)学号：20041518

The Elevation of Labor Cost on Export Trade of China’s Industrial Sectors——An Empirical Study Based on The Data of 33 Industries

在我国经济增长日趋放缓的背景下，关于转变经济增长方式和我国经济增长驱动力的研究日益引起学术界重视。长期以来我国经济增长主要依靠三驾马车，投资、消费和进出口，其中投资和进出口是我国经济增长的主要驱动力，然而近年来我国内外部环境的改变使得我国出口环境发生很大变化。我国即将步入老龄化时代，劳动力成本逐年上升，我国廉价劳动力优势受到很多新兴经济体的挑战，同时世界经济不稳定使我国出口市场受到很大影响。本文基于这样的背景研究劳动力成本上升对我国出口贸易的影响。 本文运用1999-2012年33个工业行业的出口面板数据和工业行业的年平均工资数据建立计量模型，就劳动力成本上升对我国工业行业出口贸易的影响做了...The economic growth has noticeably slowed down, which is the current overall economic situation in China. It is in this context that research about the achievement of a restructured transformation of the economic growth pattern and the driving force of China’s economic growth have been given priority within academic fields. The development of China has long been droved by three factors: investment...学位：经济学硕士院系专业：经济学院_国际经济学学号：1572012115182

Hydraulic press design for mass customization based on product layout model

【中文文摘】为实现液压机产品的大规模定制快速响应设计,提出了一种基于布局模型的产品设计方法。通过构建液压机的产品功能需求模型、运动功能模型和模块结构模型之间的映射,将得到的布局结构实例化,采用有限元和变量化方法进行布局结构的分析和优化,从而得到最优布局模型。分析得到的所有布局模型将作为产品平台的一部分加以存储,以支持产品的大规模定制设计。论述了液压机产品布局模型的拓扑结构和约束信息表达方法。最后给出了基于布局的大规模定制产品的配置和变型设计过程,该过程显示,布局模型的研究与应用可明显提高液压机类机械产品的设计效率。另外,对产品布局模型在大规模定制产品平台开发过程中进行了分析,完善和补充了大规模定制产品平台体系。 【英文文摘】To meet the requirements of rapid design of hydraulic press, a methodology of Mass Customization (MC) product design based on product layout model was proposed, in which hydraulic press layout model was exemplified through mapping among product requirements model, movement function model and module structure model. And then the layout model was analyzed and optimized by Finite Element Method (FEM) to obtain the most optimized layout model. All the layout models were added into product platform database to support MC product design. Sub- sequently , the topology and const raint description of layout model were discussed. Finally , the configuration and va- riant design process of MC product based on layout model was provided to illust rate that layout model could effectively improve the design efficiency of hydraulic press.国家自然科学基金资助项目(70402013); 福建省青年科技人才创新项目资金(2004J019)资助项目

Research on Commonality Decision,Evaluation and its Application for Product Family

作为产品族规划或再设计的关键环节,通用性决策有效缓解产品系列繁殖的负面效应,成为企业资源整合的重要手段。通过研究产品族通用性相关文献,回顾了产品族通用性的基本概念并分析了通用性决策在产品族设计中的关键作用;基于通用性决策过程,着重从零部件层次、正反两个方面论述了通用性对产品族全生命周期各阶段成本的影响,总结了基于产品族体系结构的通用性评价指标和面向参数化产品族的通用性评价指标,分析了通用性与产品性能、通用性与市场绩效之间的权衡模型及其应用;最后讨论了目前研究中的不足之处并指出了产品族通用性的未来研究方向。As a key link in product family/platform planning or redesign,commonality decision effectively alleviates the negative effects of product line propagation,leading to an important measure in enterprise resources integration. Via analysis of pertinent literatures on product family commonality,basic concepts were reviewed and the pivotal role of commonality decision in product family design was demonstrated firstly. Then,based on the process of commonality decision,impacts of commonality on costs at each stage of the whole lifecycle were discussed from component level and both positive and negative aspects,evaluation indexes both based on the product family architecture and for parametric product family were summarized,tradeoff models between commonality and product performance and between commonality and market performance were examined in detail. Finally,deficiencies in recent researches were pointed out and future research directions were discussed.国家自然科学基金资助项目(71172055);; 科技部创新方法工作专项(2011IM020400);; 厦门市科技计划项目(3502Z20125017

Mathematical Modeling and Numerical Analysis of Tooth Profiles Based on Line of Action

在研究直齿圆柱齿轮啮合原理的基础上,提出了面向啮合线的齿轮齿廓设计方法。建立了面向给定啮合线的齿轮齿廓的数学模型;并以啮合线为椭圆形状的齿轮齿廓设计为例;验证了设计方法的合理性和正确性,最后计算了利用该方法设计出的齿轮的重合度,并与相同参数的渐开线齿轮进行了比较。研究结果表明:通过给定的啮合线形状设计齿轮齿廓比直接给定齿廓形状更容易控制齿轮的啮合性能。On the basis of research on engagement principle of spur gear drive,a design method of tooth profile based on line of action is presented.The mathematical models,including the equation of action line,the equation of the tooth profile for the driving gear,and the equation of the conjugate tooth profile,are established based on the meshing theory.The simulation result of the specific example demonstrates the design method is correct and feasible.The contact ratio of the proposed gear drive is calculated.A comparison study of the contact ratio with the involute gear drive is also carried out in this work.It will be better to control the performances of a gear set by specifying the shape of action line rather than specifying tooth profiles of mating gear.国家自然科学基金项目(51205335;50975242); 福建省高校产学合作科技重大专项项目(2011H6024); 福建省教育厅项目(JB11175)资

Solid-state NMR study of electrode/electrolyte materials for lithium-ion batteries

固体核磁共振(nMr)技术可探测固态材料中目标原子核周围的化学环境,是一种研究短程结构信息灵敏的表征手段.通过高转速魔角旋转6,7lI nMr谱,2d6,7lI EXSy谱以及弛豫时间T1,T2的测定,可获得锂离子电池电极/电解质材料的微观结构和离子扩散动力学信息,并可用于研究锂离子电池正负极材料在充放电过程中的结构变化,为锂离子电池电极/电解质材料的设计与发展提供理论支持.本文综述了近年来固体nMr技术在锂离子电池正负极材料、固体电解质及固体电解质界面膜(SEI)研究中的应用和发展.Solid state NMR can probe the surrounding chemical environment of nucleus in the solid materials,which is a useful characterization tool for studying the local structure informations.Through high magic angle spinning(MAS)6,7Li NMR,2D6,7Li EXSY spectra and the testing of T1,T2,we can analyze the microstructures of batteries electrode/electrolyte materials and the dynamics of lithium ions,therefor understand the structure evolution of cathode/anode materials over charge/discharge process,which provides a theoretical support for the design and development of electrode/electrolyte materials for lithium-ion batteries.In this paper,we review the recent development and application of solid state NMR techniques in the study of cathode/anode,solid electrolyte materials and solid electrolyte interface film.国家重点基础发展研究计划(2011CB935903); 国家自然科学基金重点项目(21233004)资

Role of Nrf2/ARE in chemoprevention of cancer

化学致癌过程是涉及启动、促进和进展等多阶段的复杂过程。癌症的化学预防是应用天然的或合成的化学物质,以阻断、抑制或其癌变过程,从而达到预防肿瘤的目的。化学致癌物的体内生物转化依靠肝脏的Ⅰ相和Ⅱ相代谢相酶来完成。作为对化学预防剂的应答反应,碱性亮氨酸拉链蛋白家族成员转录因子Nrf2首先从胞质蛋白Keap1上解离,然后发生核内转位,与Ⅱ相代谢酶基因上游的抗氧化反应元件结合诱导Ⅱ相代谢酶基因的表达,这是化学防癌的重要机制;Nrf2/ARE对Ⅱ相代谢酶的调节涉及PI3K、MAPK、PKC等细胞内重要信号传导途径。这些发现加深了化学防癌机制的认识并为评估潜在抗癌物质提供了新的策略。 【英文摘要】 Chemical carcinogenesis is involved in complicated multiple stages of initiation,promotion and progression.Chemoprevention comprises multiple intervention methods using either pharmacological or dietary agents to impede,arrest,or reverse carcinogenesis at various stages.Biotransformation of carcinogens may be associated with hepatic phase Ⅰ and Ⅱ detoxifying enzymes.It is proved that Nrf2,a member of the basic-leucine zipper family of transcription factors,is dissociated from cytoplasmic protein Keap1 first..

水稻辐照花粉受精行为的研究

水稻辐照花粉受精行为的研究王侯聪，陈正明，陈如铭，杨觉民（厦门大学生物系，厦门）杨惠杰（福建省农科院稻麦研究所）用0、0.093、0.186和0.372kgy的￣60COy射线辐照不育系的保持系V＿20b的成熟花穗，辐照后即在不育系V＿20A（经温汤..