oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 58 )

2018 ( 1585 )

2017 ( 1584 )

2016 ( 1629 )

Custom range...

Search Results: 1 - 10 of 73678 matches for " 朱培 "
All listed articles are free for downloading (OA Articles)
Page 1 /73678
Display every page Item
四旋翼飞行器自适应滑模控制方法研究
Adaptive Sliding Mode Controller for Quad Rotor Aircraft
 [PDF]

, 王立峰
Dynamical Systems and Control (DSC) , 2015, DOI: 10.12677/DSC.2015.41002
Abstract:
四旋翼飞行器的模型参数不确定性及外界扰动,使控制系统的设计具有挑战性。本文提出了一种自适应滑模控制方法,应用于四旋翼控制系统的快回路和慢回路中实现航点轨迹跟踪。在滑模控制保证系统的鲁棒性前提下,引入自适应控制单元来补偿模型参数不确定性和外界扰动,并用Lyapunov理论证明了系统的渐进稳定。仿真结果表明该方法能够良好的跟踪参考高度和轨迹。
It is a challenge to design the controller for quadrotor aerial robot because of its uncertainty of model parameter and extern disturbance. The paper presents an adaptive sliding mode controller which is applied to the slow and fast loop control of quadrotor for waypoints trajactory tracking. On the premise of sliding mode control to ensure the control robustness, the adaptive control variables are used to compensate the parameter uncertainty and extern disturbance. Base on the Lyapunov theory, the global asymptotic stability is validated. It behaves perfectly at the reference altitude and trajectory track in simulation.
一类新型半拓扑空间及其分离性质
A New Semi-Topological Space and Its Separation Property
 [PDF]

胡西超,
Pure Mathematics (PM) , 2015, DOI: 10.12677/PM.2015.54020
Abstract:
2002年,A. Csaszar引入的广义拓扑空间定义仅包含拓扑空间定义条件的一半。因此,广义拓扑实际上是一类半拓扑。如果把广义拓扑相对于拓扑的另一半条件作为另一类半拓扑,那么这类半拓扑能否像广义拓扑那样具有一些良好的特征性质?本文就此问题进行研究,在这类半拓扑的点集理论和分离性质获得了一系列结果。
In 2002, the concept of a generalized topological space was introduced by A. Csaszar. But it contains only half of the conditions in the definition of a topological space. Therefore, a generalized topology is a kind of semi-topologies actually. If we use the other condition of a topology which is contrary to the generalized topology as another semi-topology, can this new semi-topology be of some good properties, just like a generalized topology? This thesis is about this problem, and several results are obtained for the theories of point set and separation properties of this semi-topological space.
一种基于时空可信度推断AS商业关系的方法
Method for Inferring AS Relationship Based on Temporal and Spatial Reliability
 [PDF]

刘磊, , 胡照明
Software Engineering and Applications (SEA) , 2016, DOI: 10.12677/SEA.2016.51005
Abstract:
本文提出了一种基于时空可信度的AS商业关系推断方法,该方法选取多个时间点的不同监测点路由表,基于路由策略和层次结构初步推断每个时刻不同监测点的AS商业关系,并基于空间一致性和时间稳定性计算其可信度值,根据给定阈值选取可信的AS商业关系。同时,本文还分析了路由监测点数量与阈值对有效AS商业关系推断的影响。实验结果表明,选取恰当数量的路由监测点与阈值可以有效提高AS商业关系的精准度。
In this paper, a new method of inferring AS relationship by analyzing the temporal and spatial reliability is proposed. Firstly, the method selects the routing tables which originate from different monitored points in different intervals. Based on the routing strategy and the hierarchical structure, the AS relationship of different monitored points is inferred in every time window. Moreover, we define and calculate the value of the temporal and spatial reliability by analyzing the spatial consistency and time stability. Furthermore, we set a threshold and regard any AS relationship with reliability value greater than the threshold as trusted relationship. In the meanwhile, we analyze the number of monitored points and the threshold to infer the influence on AS relationship’s validity. Experiment result shows that the accuracy of AS relationship deduction can be largely improved by selecting appropriate number of routing monitored points and the threshold value through our proposed methods.
关于R-半拓扑空间的一些探究
Some Research on R-Semi-Topology Space
 [PDF]

靳敏倩,
Pure Mathematics (PM) , 2016, DOI: 10.12677/PM.2016.66062
Abstract:
本文首先对R-半拓扑空间中点集的性质进行研究,然后对R-半拓扑的比较进行讨论,最后研究R-半拓扑空间的分离性质,并且在上述三个方面都分别获得了一些理论结果。
Firstly, we explore the properties of point set on R-semi-topology space and then discuss the comparative theory of R-semi-topology. Finally separation properties of the R-semi-topology space are studied. Some theoretical results are obtained respectively in the above three aspects.
原子核的U(6/24)超对称性Ⅱ.U(3)×(j=(1/2),(3/2),(5/2),(11/2))多j超对称性

科学通报 , 1985,
Abstract: 一、引言我们在前文中讨论了原子核的U(6/24)超对称性,而且较详细地讨论了O(6)×(j=1/2,3/2,5/2,11/2)多j超对称性。本文讨论U(3)×(j=1/2,3/2,5/2,11/2)多j超对称性。
“群体”与“群体生理”的逻辑检验——兼评钟补求与王天铎两先生的争论

科学通报 , 1963,
Abstract: “群体”一词既是形态术语“群体”的歧义词,又是“整体”、“全体“、“总体”、“集体”、“综合体”或“复合体”的近义词或条件同义词,也是植物学术语“成员群”、“聚居群”、“种群”、“群落”、“生物地理群落”、“生物群落”、“植物群落”、“栽培植物群落”、“农业植物群落”、“植丛”、“群丛”、“群集”、“小群聚”或“大群聚”等等的俗称。这种多义
用酶标试纸检测青菜叶片内的长叶车前花叶病毒

科学通报 , 1982,
Abstract: 将免疫酶标抗体溶液,湿润醋酸纤维薄膜,待凉干后冰箱保存备用。用上述薄膜紧贴于一定方式处理过的器官、组织表面进行孵育,然后用酶底物显色的方法就能检测这些器官、组织内的相关抗原,作者称这种含有酶标记抗体的薄膜为酶标试纸。免疫酶标技术以往使用的是
酶标醋酸纤维膜免疫电泳技术定量检测青菜病毒

科学通报 , 1985,
Abstract: 我们建立的酶标醋酸纤维膜免疫电泳技术KEXUE TONGBAO, A Monthly Journal of Science,6 (1982), 670—672. ]灵敏度高,使用方便。本文进一步报道该技术的定量检测。 将酶标醋酸纤维膜免疫电泳的实验结果,用改装的凝胶电泳扫描装置予以扫描记录,查明线性关系好,重复性强。本文所用抗原系长叶车前花叶病毒(简称RMV),并用过氧
浮游动物的生态培养法

科学通报 , 1988,
Abstract: 曾经报道泥鳅(Misgurus anguillicaudatus)促进小球藻(Chlorella)的增殖(《科学通报》1980,7:330—331)。今用罗非鱼(Tilalia mossambica)与小球藻混养,小球藻的敌害生物——浮游动物——被罗非鱼大量吞食,不会成灾。罗非鱼也能起搅拌、补充二
泥鳅促进小球藻的增殖

科学通报 , 1980,
Abstract: 在文献中尚未见到用泥鳅(Misgurus anguillicaudatus)促进小球藻(Chlorella)增殖的培养方法。本试验把泥鳅养在小球藻的培养液中(泥鳅与藻液的重量比一般采用1:100—1:50),对促进小球藻的增殖效果显著,比用人工搅拌的方法进行培养,增殖快且培养稳定。实验是将粉核小球藻培养在两个500毫升容量的烧杯内,每一烧杯装有300毫升培养液,
Page 1 /73678
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.