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Search Results: 1 - 10 of 32085 matches for " 仉小猛 "
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含风电电力系统的主从博弈经济调度
Economic dispatch for power system integrated with wind power using Stackelberg game

梦林,,文劲宇
控制理论与应用 , 2018, DOI: 10.7641/CTA.2017.70676
Abstract: 风力发电具有显著的随机性和波动性, 对电力系统原有调度模式提出挑战. 采用鲁棒优化处理风电不确定 性, 利用鲁棒优化蕴含的博弈思想, 将风电场看作调度中心的一个虚拟博弈者, 利用双层规划法建立了二者的主从 博弈模型, 将调度中心看作领导层, 其决策目标为电网运行的成本最低, 将风电场看作下属层, 其决策目标是能保证 系统实时安全运行的最大风电出力区间. 由于考虑了火电机组的阀点效应, 主从博弈模型呈现出非线性双层规划 的数学特点, 提出一种改进教与学算法与线性规划相嵌套的求解方法. 最后, 采用改进的10机39节点系统对模型以 及求解方法的有效性进行了验证.
Wind power generation has obvious randomness and volatility, which challenge the original scheduling mode of power systems. The paper adopts robust optimization method to cope with the wind power uncertainty, and it takes the wind farm as a virtual game player of the dispatching center by using the game theory contained in robust optimization. A Stackelberg game model for dispatching center and the wind farm is established by utilizing the bi-level programming method. In the model, the dispatching center is taken as the leader level whose decision objective is the lowest power system operation cost, and the wind farm is taken as the follower level whose decision objective is the maximum wind power safe interval which can ensure the power system operation safety in real-time. As the valve point effect of thermal power units is considered, the model presents the characteristics of bi-level nonlinear programming, and a nested solving method of an improved teaching-and-learning method and linear programming is proposed. Finally, the revised 10-machine 39-node system is used to verify the effectiveness of the model and the solution method.
高温钢坯防氧化涂料用易熔玻璃粘结剂的制备及改性
王书华,魏连启,,周旬,叶树峰,陈运法
过程工程学报 , 2011,
Abstract: 为使防氧化涂料在高温普碳钢坯上粘附,熔制了P2O5-ZnO-Na2O系基础玻璃,用B2O3,Fe2O3,MnO,CoO,NiO进行改性并对其性能进行了表征.结果表明,粘结剂在升温过程中有晶相析出,用B2O3和Fe2O3改性后其软化温度为750℃,继续用MnO,CoO,NiO改性其软化温度为596℃;热处理前粘结剂为无定型玻璃态,用B2O3和Fe2O3改性后于476℃保温10min,主要有Zn(PO3)2晶体析出,用B2O3,Fe2O3,MnO,CoO,NiO改性后于428℃保温10min,主要有Ni(PO3)2析出;晶相析出后,玻璃的软化温度提高54℃.将不同易熔玻璃作为高温粘结剂,软化温度是决定高温瞬间粘附性能的重要因素.粘结剂加入涂料中,实现了涂料在高温钢坯上瞬间粘附,实验室防氧化效果为59.24%,简要分析了涂料和玻璃粘结剂的结合机理.
两步溶液浸渍法提高石墨材料的高温抗氧化性能
邓亚利,,魏连启,叶树峰,陈运法
过程工程学报 , 2012,
Abstract: 用2种浸渍液采用两步浸渍法对石墨材料进行浸渍处理,以提高其高温抗氧化性能.浸渍液一的主要组分为MgCl2,Al(OH)3,H3PO4;浸渍液二的主要组分为硼砂、三聚磷酸钠及TiO2.采用SEM,TG-DTA,XRD分析了浸渍后材料的化学组成、结构及氧化失重.结果表明,在1150℃空气中氧化1h,石墨失重率小于10%,其抗氧化性能比未经处理的空白样提高60%.处理后的石墨在高温作用后其表面结构致密且边缘棱角分明,与空白样有明显区别.2种浸渍液在高温作用下生成了玻璃聚合体,附着在石墨表面及孔隙中,起到抗氧化作用.
Preparation of Silicon Nitride Ceramics with High Wear Resistance by Aqueous Colloidal Process
水溶性胶态成型工艺制备氮化硅耐磨结构陶瓷

HAO Hong-Shun,XU Li-Hua,ZHANG Xiao-Meng,LIU Ming,FU Zhi,
郝洪顺
,徐利华,,刘明,扶志

无机材料学报 , 2008,
Abstract: Advanced silicon nitride ceramics with high wear resistance were fabricated by colloidal process. Orthogonal design was utilized to optimize the process parameters.The change of Zeta potential for Si3N4 particles after adding dispersant was analyzed. Furthermore, the microstructure, mechanical properties and wear resistance of silicon nitride ceramics were investigated. The results indicate that the green body with high density can be formed when the volume fraction of solid phase of silicon nitride slurry is equal to 45%. And silicon nitride ceramics with fracture toughness of 7.21MPa·m1/2, hardness of 9.30GPa is obtained in the optimum condition. The friction and wear tests show that silicon nitride ceramics happen to crisp rupture and break off in the dry condition; while in the water-lubricated condition, the film of Si(OH)4 is formed on the friction surface, and the wear mechanism is mainly chemical fretting wear.
Improvement in Anti-oxidation of Two-step Dipping Graphite with Different Solutions
两步溶液浸渍法提高石墨材料的高温抗氧化性能

DENG Ya-li,ZHANG Xiao-meng,WEI Lian-qi,YE Shu-feng,CHEN Yun-fa,
邓亚利
,,魏连启,叶树峰,陈运法

过程工程学报 , 2012,
Abstract: A two-step dipping method was used to treat graphite with two solutions for improving its oxidation resistance.One dipping solution was mainly composed of magnesium chloride,aluminum hydroxide,phosphoric acid and another one borax,sodium tripolyphosphate,titanium dioxide.The composition and structure and mass change of the dipped graphite were analyzed by SEM,TG-DTA and XRD.The results showed that the mass loss of dipped graphite sample was less than 10% in air at 1150℃ for 1 h and the oxidation resistance was increased by 60% compared with untreated blank sample.The treated sample had flat surface,compact structure and clear edge after high temperature treatment,which was different from blank sample.The two kinds of dipping solution in high temperature formed glass polymer which was attached on the surface and pores of graphite,playing the role of oxidation resistance.
Preparation and Modification of Low Melting Glass as High Temperature Oxidation-resistant Coatings Binder for Steel Ingots
高温钢坯防氧化涂料用易熔玻璃粘结剂的制备及改性

WANG Shu-hua,WEI Lian-qi,ZHANG Xiao-meng,ZHOU Xun,WANG Xiao-jing,YE Shu-feng,CHEN Yun-fa,
王书华
,魏连启,,周旬,王晓婧,叶树峰,陈运法

过程工程学报 , 2011,
Abstract: The low melting glass used as a binder for high-temperature plain carbon steel was synthesized by P2O5,ZnO,and Na2O,then modified with B2O3,Fe2O3,MnO,CoO,and NiO.The results of DTA and XRD showed that the low-melting glasses could be changed to glass-ceramic with heat treatment.Zinc phosphate was precipitated from the A glass which modified with B2O3 and Fe2O3 after the heat treatment,while nickel phosphate was precipitated from the glass C which modified with B2O3,Fe2O3,MnO,CoO and NiO.The softening temper...
基于人工神经网络的煤炭消耗量预测研究
Prediction of the Coal Consumption Based on Artificial Neural Network
 [PDF]

义美, 韩杨
Computer Science and Application (CSA) , 2013, DOI: 10.12677/CSA.2013.36048
Abstract:
本文利用我国2000~2011年的能源统计数据,针对我国煤炭消耗量问题,应用人工神经网络模型对煤炭消费量进行预测分析与评估。首先通过对2000~2010年的能源统计数据对网络模型进行学习训练,在此基础上对2011年的煤炭消费量进行预测。然后,在对这12年的煤炭消费量预测的结果进行评估分析。最后为与煤炭消耗相关的决策者们提供科学且有价值的参考依据。
>To the coal consumption problem of China, artificial neural network model for coal consumption’s predictive analysis and assessment was set up with the energy statistics of the years 2000-2011. At first, the ANN model was trained through the energy statistics of the years 2000-2010, on this basis, the model will predict the coal consumption of the year 2011. Then the results predicted of the coal consumption in the recent 12 years will be analyzed and assessed. In a word, it provides some scientific and valuable reference for the managers and decision makers.
一株土壤杆菌降解菲的代谢途径初探

中国科学 地球科学 中国科学 地球科学 , 2005,
Abstract: ?初步探讨了分离自大庆油田驱油水中的一株高效降解菲的土壤杆菌Phx1代谢菲的途径.Phx1在牛肉膏蛋白胨(BP)培养基、Luria-Bertani(LB)培养基和无机盐(MS)培养基中均可以在24h内将100μg/mL的菲几乎降解殆尽,且BP和LB培养基对菌体的生长以及菲的降解是有益的.对Phx1在MS培养基中降解菲1,3,7d产物分别进行GC-MS分析,结果从第1d的降解产物中检测到了1-羟基-2-萘甲酸(1H2N)和1-萘酚(NOL),到第3d时只发现NOL,第7d时NOL也消失了,而NOL是菲的细菌经典代谢途中所没有的,并发现此物质在降解产物中有大量的积累;对其不同时间降解产物进行HPLC分析,结果验证了GC-MS的结果,并首次发现菲降解中由邻苯二甲酸(OPA)产生邻苯二酚(CAT)的新现象;进一步以OPA为底物接种Phx1,结果在其降解产物中也检测到CAT,从而推断Phx1降解菲的途径不完全相同于目前已有的报道,可能是一条新途径.
全国加权残值法工作会议记要(1987.9.25~27)

工程力学 , 1987,
Abstract: 为了开好第三届全国加权残值法学术会议和讨论一些急需解决落实的问题,全国加权残值法工作会议由同济大学徐次达教授主持于1987年9月25日—27日在成都西南交大成都分院召开。
汾河地堑湖盆第四纪地貌—沉积特征的构造控制
,郭家秀,胡向阳
地理学报 , 2010, DOI: 10.11821/xb201001008
Abstract: 野外对临汾、太原盆地第四纪中晚期所发育的湖积地貌-沉积特征调查发现,湖盆在对应于S8、S5和S1古土壤开始发育时期(时代分别为0.77MaBP、0.55MaBP和0.13MaBP)曾发生了三次强烈湖退,这三次湖退都是构造原因所致的;而在L11-S8、L8-S5、L5-S1黄土古土壤堆积发育期间(时代分别对应于0.96~0.77MaBP、0.74~0.55MaBP和0.47~0.13MaBP)、以及S1古土壤发育以后的时期(时代为0.07MaBP之后)出现的却是缓慢湖侵或盆地下沉。根据这些发现并结合地球物理学前期已获得的有关盆地深部上地幔结构及活动规律,本文提出了盆地湖侵-湖退过程的构造控制模式。在上地幔强烈上拱→减弱或渐趋稳定→再次强烈上拱的构造循环中,地表湖盆会以大幅快速湖退→缓慢湖侵→再大幅快速湖退这样的表现与之对应。盆地地表的地貌-沉积发育与地下的上地幔活动应具有因果关系。
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