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国家电连锁零售巨头经过近年来的蓬勃发展,其在一二级市场的布局业已基本完成。在强大经济驱动和良好的政策环境下,它们自然开始把目光投向潜力巨大且不断成熟的三四级市场。2006年4月2日,国美集团副总裁李俊涛向网易商业报道透露说,国美已经正式启动了农村市场计划。该计划的核心内容是:借进入农村市场契机,发展大量的下线——农村零售商,完成国美从单一的零售终端角色到经销商角色的过渡。至此,大型家电连锁巨头进军农村家电市场的号角已经吹响,家电行业新一轮的角逐不可避免,硝烟正起。在这场乡镇家电渠道的大革命中,以国美为代表的家电… 相似文献
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在我国,特别是在东部发达地区,经销商的经营模式已经处于转型过程中,对资金的需求量是很大的。每当在旺季打款或者看上好的终端的时候,货款和进店费就成了悬在经销商头上的紧箍咒,所以经销商在一年到头的绝大多数时间里生意是不温不火的。 相似文献
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家电零售模式主要包括三种:综合商场.家电专卖店、家电连锁大卖场。近年来,家电连锁大卖场利用其雄厚的资本实力和快速复制的性能在全国各地跑马圈地带动了整个家电零售行业的加速升级,综合商场依靠完善的终端网点布局和强大的顾客吸引力在家电零售业中也占据着重要的位置,比较而言,家电专卖店(本文主要指品牌和厂家专卖)无论在资本实力还是终端网络方面都具有明显的劣势。 相似文献
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Numerical Study on Arc Plasma Behavior During Arc Commutation Process in Direct Current Circuit Breaker 总被引:1,自引:0,他引:1
This paper focuses on the numerical investigation of arc plasma behavior during arc commutation process in a medium-voltage direct current circuit breaker(DCCB) contact system.A three-dimensional magneto-hydrodynamic(MHD) model of air arc plasma in the contact system of a DCCB is developed,based on commercial software FLUENT.Coupled electromagnetic and gas dynamic interactions are considered as usual,and a thin layer of nonlinear electrical resistance elements is used to represent the voltage drop of plasma sheath and the formation of new arc root.The distributions of pressure,temperature,gas flow and current density of arc plasma in arc region are calculated.The simulation results indicate that the pressure distribution related to the contact system has a strong effect on the arc commutation process,arising from the change of electrical conductivity in the arc root region.In DCCB contact system,the pressure of arc root region will be concentrated and higher if the space above the moving contact is enclosed,which is not good for arc root commutation.However,when the region is opened,the pressure distribution would be lower and more evenly,which is favorable for the arc root commutation. 相似文献
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在春雷的滚滚声中,一年一度的“五一”黄金周悄悄的向我们走近了。面对熙熙攘攘的人群,面对车如流水马如龙的繁华景象,面对“假日经济”的无限诱惑.众多“思想家”绞尽脑汁,各种花样也是层出不穷,如是促销也变得唯美起来。 相似文献
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针对地区电网发展特点,从电网投入产出角度出发,研究和探索了地区电网评估体系,利用数据包络分析方法,以220 kV及110 kV电网、35 kV及以下电网分别作为研究对象构建投入产出评价模型,通过综合效率分析、投影分析,得到了基于投入与产出的电网效益值、非有效单元与目标值的差距、投入要素的冗余等信息,系统全面地评价了地区电网的投入产出效率,为优化资源配置,提高资源使用效率提供了科学的辅助决策依据,有利于促进各级电网协调发展。实例计算结果证明了该方法的有效性。 相似文献
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This paper focuses on a numerical simulation of the arc plasma behavior in the arc splitting process,considering the eddy currents in the electrodes and the splitter plate.Based on three-dimensional(3D) magneto-hydrodynamic(MHD) theory,a thin layer of nonlinear electrical resistance elements is used in the model to represent the voltage drop of plasma sheath and the formation of new arc root in order to include the arc splitting process in the simulation.In the arcing process,eddy currents in metal parts are generated by a time-varying magnetic field.The arc model is calculated with the time-varying magnetic field term,so that the eddy current effects can be considered.The effect of nonlinear permeability of a ferromagnetic material is also involved in the calculation.Using the simulation results for the temperature,velocity and current density distribution,the arc splitting process is analyzed in detail.The calculated results are compared with the simulation neglecting eddy currents. 相似文献
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从历史演变上看,竞争焦点、厂商关系与经销商会议的发展密切相关,如下表所示:所以,如今的经销商年会应该是一个“充电器”,充足与会经销商一年的“电”,“电”由知识、信心、情感组成,使得参加会议后的每一个经销商,能统一思想,雄心勃勃,信心满怀。输入知识、信心、技能,混合成 相似文献