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“随着国际产业转移加快与结构调整深度化,2008年及今后较长时间内,发达国家向我国转移成套高端技术装备等重化工制造业的高潮将会逐渐显现。”机械工业信息研究院战略与规划研究所日前发布2008中国装备制造业发展形势与展望报告,对当前我国装备制造业面临的国际市场形势做出上述判断。在同一天召开的装备制造业自主创新研讨会上,国家发改委重大装备办李冶司长提醒装备制造企业,应提早做好应对市场饱和后行业竞争格局变化的准备,尽快提升企业的自主创新能力。 相似文献
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当我们带着问题去阅读《中国制造业向何处去》的时候,我们在书里找到了答案,升级与转移——中国制造业的突围之路。对于整个制造业而言,产业结构的改善和产业素质与效率的提高是产业升级的重要途径,而对于区域的产业结构调整,产业转移就是其重要的途径。在市场经济发展日渐成熟,产业升级加速的今天,产业的升级与转移将是制造业发展的光明出路。 相似文献
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全球经济最突出的表现就是发达国家把非核心的制造业转移到发展中国家,利用发展中国家廉价的劳动力、土地、矿产等资源以及当地的市场牟取利益的最大化。全球范围制造业东移的趋势已经持续了30年。在这段时期内中国东部沿海地区依靠交通便利、工业基础相对雄厚的优势, 相似文献
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Electrical Engineering - Der Magnetisierungsstrom von Stromwandlern wird während des Betriebes nach zwei Methoden ermittelt. Die eine beruht auf der Berechnung aus dem... 相似文献
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针对孤岛直流微电网中多个储能单元的协调控制,提出了一种基于改进一致性算法的储能系统分布式控制策略。首先,提出了一种改进一致性算法,并证明该算法相比经典一致性算法收敛时间更短。然后,基于改进一致性算法,提出了一种储能系统分布式控制策略,通过合理调节各储能单元的功率,维持了直流母线电压的稳定、避免了储能电池的过充过放。该策略具有两种运行模式,分别适用于微电网有扰动与无扰动的情况,在及时调节储能单元功率的同时,减少了控制所需的通信量和计算量。最后,搭建了孤岛直流微电网系统仿真算例,仿真验证了所提控制策略的有效性及其在控制时间方面的优越性。 相似文献
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应用科学有效的评价方法对综合能源系统(integrated energy system, IES)的规划方案进行评价,可为其合理建设与运行提供重要保障。首先分析了双碳目标下工业园区IES的能源架构及运行模式,将其多能互补的特征与碳减排、碳交易机制有机融合,构建了涵盖经济、技术和环境三大方面的综合评价指标体系。然后,针对IES运行的不确定性问题,以云物元模型建立综合评价的基础框架并对该模型实际应用的不足进行了两点改进:一方面考虑评价者对模糊性的可接受程度对云熵参数计算方法进行优化;另一方面基于最小鉴别信息原理将决策实验室(decision-making trial and evaluation laboratory, DEMATEL)法与CRITIC法结合,解决了单一赋权方法导致的偏向性问题,得到更为合理的组合权重。最后,通过算例分析验证了所提评价方法可以有效解决传统物元评价的长板或短板效应以及系统运行不确定性带来的评价难题。 相似文献
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An operational transconductance amplifier (OTA) and an operational amplifier are being used to synthesize various second-order cascadable active RC filters. Two of them are active R filters. The filters are studied both theoretically and experimentally and are found to have low sensitivity to variations in their component values. They work satisfactorily in practice, except that some of them have a rather limited dynamic range. 相似文献
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Differences in the rules and lack of communication may produce inconsistent solutions for the net power interchange between regional transmission organizations (RTOs). Such inconsistencies cause trading barriers or seams issues which may impact grid reliability and cause economic inefficiencies. We describe several challenges to the efficient allocation of resources across multiple RTOs that are caused by these inconsistencies. We also question joint optimal dispatch as a benchmark by illustrating some potential weaknesses of this approach. 相似文献
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《The Electricity Journal》2019,32(10):106675
Energy Management Systems (EMS) are control schemes in charge of defining the optimal scheduling of dispatchable units in a microgrid. Output set points from the EMS could be exploited in other control loops that may benefit from the microgrids expected behavior improving their operation. In this context, this paper proposes a novel coupled operation of an EMS with an Adaptive Protection System (APS), such that the information of the EMS serves to compute the parameters of the protective devices deployed in a microgrid. This aspect is formalized in the present proposal based on already developed APS and EMS frameworks. To evaluate the performance of the proposal, the microgrid installed in Huatacondo, north of Chile, was used as a test-bed. The obtained results indicate that considering the information provided to the APS form the EMS improves the overall performance of the microgrid in case of failure, despite the operating conditions. This also indicates that moving towards an integrated design of the EMS and APS might enhance the behavior (robustness) of a microgrid (as a whole) in case of failures or contingencies. 相似文献