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Research on synchronization of complex networks with random nodes
具有随机节点结构的复杂网络同步研究

Liu Jin-Liang,<br>
物理学报 , 2013,
Abstract: This paper deals with the synchronization of complex networks with random nodes. Sufficient conditions for the synchronization of complex networks are derived by using the Lyapunov functional method and linear matrix inequality technique, and the obtained criteria depend on not only the size of the delay, but also the probability distribution of random nodes. A simulation example is exploited in order to illustrate the effectiveness of the proposed method.
DISTRIBUTION OF LOCUSTS & GRASSHOPPERS IN HEBEI PROVINCE
河北省蝗虫分布状况

Ren Chunguang,<br>任春光,王振庄,李炳文,,武瑞林
生态学报 , 1990,
Abstract: This article records 75 species of locusts and grasshoppers from Hebei Province. The acridoids are belonging to 5 subfamilies, 40 genera. According to the characteristics of ph sical geography of He-bei Province, it may be divided into four zones: Zhangbei plateau, Northern moatainous, Western montainous and Hebei plains. The distributional number of locusts and grasshopprs are 44,50,43, and 29 species respectively. Different species of locusts and grasshoppers have their own distibutional zonation, plasticity and regularity in different longitude, latitude and elevation. The range of the vertical distribution fdr different locusts and grasshoppers are also varied from each other with their own upper and lower limit.
Study on PCP degradation ability of sludge in different levels of UASB reactor
UASB系统不同高度层污泥降解五氯酚能力研究

Xue Jianliang,Li Jinchunzi,Liu Guangmin,<br>薛建,春子,广民
环境工程学报 , 2011,
Abstract: 为探讨五氯酚对不同类型的厌氧微生物的毒性影响,采用UASB反应器进行了PCP模拟污水连续流实验,采用间歇实验研究UASB反应器中不同类型污泥降解五氯酚能力的实验,揭示不同PCP浓度冲击下对系统微生物的影响及各种污泥对五氯酚的降解能力差异。结果表明,在不同的PCP冲击负荷的阶段,厌氧系统对PCP和COD的去除率均表现出先迅速降低后缓慢升高的变化趋势,最终稳定运行两者的去除率可达91.5%和82.4%以上。而五氯酚对不同种群的微生物产生影响有差异,PCP对系统产甲烷菌活性产生明显抑制,而系统底层污泥的降解五氯酚的速率常数是上层的4~10倍,UASB系统降解五氯酚主要由产酸菌群为主的产酸相完成的。
河北省蝗虫种类、优势种及其分布

华北农学报 , 1984, DOI: 10.7668/hbnxb.1984.03.014
Abstract: <正>为查清蝗虫种类,明确数量多、分布广和对作物造成危害的优势种,掌握其发生和活动规律,为提高测报和防治水平提供科学依据,按照省"关于1980—1983年蝗虫调查研究项目计划"的要求,以省植保处生防站和沧州地区防蝗站为主,组织唐山地区植
一类网络环境下的离散线性系统的可靠性滤波器设计研究

电子学报 , 2012,
Abstract: 本文对一类网络环境下的离散线性系统进行了可靠性滤波器设计,其中用一组随机变量来表示传感器的概率性失真,并综合考虑网络环境的时滞、错序、丢包等非理想服务质量,建立了包含传感器随机失真的系统模型;通过使用李亚普诺夫泛函稳定性理论和线性矩阵不等式技术给出了可靠性滤波器设计算法存在可行解的充分性条件,最后通过数值算例验证本文给出方法的有效性.
群桩高墩大跨刚构-连续组合梁桥快速施工技术

铁道工程学报 , 2001,
Abstract: ?本文详细介绍了内昆铁路李子沟大桥综合施工技术,主要有深基群桩快速施工技术、大体积混凝土温度控制与防裂技术、矩形变截面液压提升平台式爬模的研制、加工和施工技术、高墩线形控制技术、高墩大跨刚构-连续组合梁快速施工和合龙技术、机械化综合配套技术等,取得了显著技术、经济和社会效益,为今后类似工程提供了成功的经验,具有广泛的推广应用价值。
Operating Effectiveness of Electron Transmission Film at the Input of MCP
微通道板电子透射膜的工作特性

(,<br>闫
光子学报 , 2004,
Abstract: A 4nm thick amorphous Al 2O 3 electron transmission film at the input of MCP is fabricated by electrostatic film-posting technology, which causes no carbon contamination in inner channel surface. The relation between film posting and glow discharge of the gases is discussed, and the electron transmission and ion barrier effectiveness of electron transmission film at the input of MCP are measured. Results of the experiment show that a 4 nm thick amorphous Al 2O 3 electron transmission film is characterized by high electron transmission, ion feedback prevention.
Studies of Electron Transmission Film at the Input of MCP by AES
微通道板电子透射膜工艺的AES研究

(,<br>闫
光子学报 , 2004,
Abstract: Electron transmission films at the input of microchannel plate(MCP) are fabricated by cold basement sputtering and electrostatic film-posting technologies. The surface compositions of the electron transmission films at the input of MCP are measured respectively by Auger electron spectroscopy(AES). Some active channel surface composition and inner channel depth profile analyses are also made for MCPs through failing technique. It is found that the failing technique of cold basement sputtering causes the serious carbon contamination on the active channel surface of MCP, such MCPs cannot be rejuvenated. However, the failing technique of electrostatic film-posting has no effect on the active channel surface, such MCPs can be rejuvenated.
柴油机过量空气系数的防熄火要求
Requirements for the Excess Air Coefficient to Avoid Flameout in Diesel Engine
 [PDF]

文鹏, , 高占胜
Journal of Security and Safety Technology (JSST) , 2015, DOI: 10.12677/JSST.2015.31001
Abstract:
柴油机这一当前应用最广泛的重要动力装置,往往由于过量空气系数降低而影响动力性能甚至直接熄火。本文根据柴油机过量空气系数与其平均有效压力、排气平均温度等主要参数的关系,基于缸内燃料燃烧过程的热力学计算,对柴油机过量空气系数的防熄火要求进行分析,给出了柴油机防熄火的临界过量空气系数理论值求解方法,从而在理论上进一步阐述了随着过量空气系数的降低,柴油机的动力性降低、热负荷增加、燃烧质量下降的现象;特别是当过量空气系数低于临界值时,柴油机会熄火,无法维持正常工作。所得结论对柴油机理论与应用的深入研究,提高其在各种不同条件下工作的可靠性具有实际意义。
As the most widely used and important power plant at present, due to the decrease of excess air coefficient (EAC), the dynamic performance of diesel engine often receives great influence even direct flameout. According to the relationship between EAC and main parameters such as mean effective pressure and mean exhaust temperature, based on the thermodynamic calculation about fuel combustion process in cylinder, this paper analyses the requirements for the EAC to avoid flameout in diesel engine and provides the method of calculating the critical EAC, and thus we can give further elaboration to the phenomenon that with the loss of EAC, the power performance re-duces, the thermal load increases and the combustion quality reduces in theory; especially when EAC is less than the critical value, the diesel engine will face flameout and can’t maintain normal work. The conclusion has practical significance to the further study of diesel engine theory and application, the reliability increase under all kinds of different conditions.
PHYSICAL PROPERTIES AND CONTROL FACTORS OF PERMIAN WUTONGGOU FORM ATION IN JIMUSAR SAG, EAST OF JUNGGAR BASIN
准噶尔盆地东部吉木萨尔凹陷二叠系梧桐沟组储层物性特征及控制因素

School of Resources,Information,China University of Petroleum,Beijing,China,<br>春慧,振奎,朱桂芳,王庆东,张建.
天然气地球科学 , 2007,
Abstract: By analyzing a great quantity of laboratory data, this paper studies the physical properties and pore structure of the sandstone reservoirs in the Permian Wutonggou formation. The reservoirs are of low porosity, moderate permeability and coarse throat. The reservoirs can be classified into 3 categories and 6 subdivisions according to the industrial standard. The sand beds of potential exploration are Types I and of the 3rd category reservoirs. The control factors of physical property are mechanical compaction, sandstone grain diameter, and denudation. It is pointed out that 3000m of burial depth is a threshold, above which the reservoir physical properties are relatively preferable because of weak compaction. It is predicted that the high quality reservoir is mainly distributed in the slope zone from Ji No. 7 well to Ji No. 17 well.
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