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A Linear Domain System Identification for Small Unmanned Aerial Rotorcraft Based on Adaptive Genetic Algorithm

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Journal of Bionic Engineering 2010年第2期7卷 142-149页

作者： Xusheng Lei,Yuhu Du School of the instrumentation Science and opto-electronic Engineering,Beihang University,Beijing 100191,P.R.China [a] School of the instrumentation Science opto-electronic Engineering Beihang University Beijing 100191 P. R. China

This paper proposes a new adaptive linear domain system identification method for small unmanned aerial *** the flash memory integrated into the micro guide navigation control module, system records the data sequences of flighttests as inputs (control signals for servos) and outputs (aircraft’s attitude and velocity information).After data preprocessing, thesystem constructs the horizontal and vertical dynamic model for the small unmanned aerial rotorcraft using adaptive *** identified model is verified by a series of simulations and *** between flight data and the one-stepprediction data obtained from the identification model shows that the dynamic model has a good estimation for real unmannedaerial rotorcraft *** on the proposed dynamic model, the small unmanned aerial rotorcraft can perform hovering,turning, and straight flight tasks in real flight tests.

关键词： small unmanned aerial rotorcraft dynamic space model model identification adaptive genetic algorithm

Effects of temperature and pressure on the structural and optical properties of ZnO films grown by pulsed laser deposition

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Science China(technological Sciences) 2010年第2期53卷 317-321页

作者： ZHAO Lei, XU ChangShan, LIU YuXue & LIU YiChun Center for Advanced opto-electronic Functional Materials Research, Northeast Normal University, Changchun 130024, China 1. Center for Advanced opto-electronic Functional Materials Research Northeast Normal University Changchun 130024 China

ZnO thin films were deposited on fused silica via pulsed laser deposition (PLD) at substrate temperatures from 300°C to 800°C and ambient oxygen pressures ranging from 10-2 mTorr to 240 mTorr. X-ray diffraction (XRD) and Raman spectra indicated that wurtzite ZnO was obtained in all cases. The highly c-oriented ZnO films were obtained for oxygen pressures above 11 mTorr. The room-temperature photoluminescence (PL) spectra demonstrated that all the films exhibited strong near-band-edge (NBE) emission, while deep-level (DL) emission was also observed in films deposited at oxygen pressures below 80 mTorr. From analysis of the XRD, Raman and photoluminescence PL data, an optimal condition was identified for the deposition of highly crystallized ZnO films.

关键词： zinc oxide film pulsed laser deposition optical properties

Study on An Absolute Non-Collision Hash and Jumping Table IP Classification Algorithms

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Wuhan University Journal of Natural Sciences 2004年第5期9卷 835-838页

作者： SHANG Feng-jun 1,2 ,PAN Ying-jun 1 1. Key Laboratory of opto-electronic tech.ology and System of Ministry of Education/College of opto-electronic Engineering,Chongqing University, Chongqing 400044,China 2. College of Computer Science and tech.ology, Chongqing University of Posts and Telecommunications, Chongqing 400065,China Chongqing University Key Laboratory of Opto-Electronic Technology and System of Ministry of Education/College of Opto-Electronic Engineering Chongqing China (GRID:grid.190737.b) (ISNI:***) Chongqing University of Posts and Telecommunications College of Computer Science and Technology Chongqing China (GRID:grid.411587.e) (ISNI:***) Chongqing University Key Laboratory of Opto-Electronic Technology and System of Ministry of Education/College of Opto-Electronic Engineering Chongqing China (GRID:grid.190737.b) (ISNI:***)

In order to classify packet, we propose a novel IP classification based the non-collision hash and jumping table trie-tree (NHJTTT) algorithm, which is based on noncollision hash Trie-tree and Lakshman and Stiliadis proposing a 2-dimensional classification algorithm (LS algorithm). The core of algorithm consists of two parts: structure the non-collision hash function, which is constructed mainly based on destination/source port and protocol type field so that the hash function can avoid space explosion problem; introduce jumping table Trie-tree based LS algorithm in order to reduce time complexity. The test results show that the classification rate of NHJTTT algorithm is up to 1 million packets per second and the maximum memory consumed is 9 MB for 10 000 rules. Key words IP classification - lookup algorithm - trie-tree - non-collision hash - jumping table CLC number TN 393.06 Foundation item: Supported by the Chongqing of Posts and Telecommunications Younger Teacher Fundation (A2003-03).Biography: SHANG Feng-jun (1972-), male, Ph.D. candidate, lecture, research direction: the smart instrument and network.

关键词： IP classification lookup algorithm trie-tree non-collision hash jumping table

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在CdS吸收型热光双稳态现象中的空间效应

中国激光 1993年第4期20卷 285-290页

作者：李慎电子科技大学电子技术系成都610054

在CdS单晶片(厚度为1～3μm)上,用Ar^+激光(λ=514.5nm)作光源,实现了室温热光光学双稳态(OB),记录了热光光学双稳态下的横向空间效应和开关波。研究了在热光光学双稳态和热击穿状态下晶体的不同性状,估算出相互独立工作的热光OB元件之... 详细信息

在CdS单晶片(厚度为1～3μm)上,用Ar^+激光(λ=514.5nm)作光源,实现了室温热光光学双稳态(OB),记录了热光光学双稳态下的横向空间效应和开关波。研究了在热光光学双稳态和热击穿状态下晶体的不同性状,估算出相互独立工作的热光OB元件之间的最小距离为200μm。

关键词：光学双稳态半导体材料激光

Design of a Two layer Scalable Wavelength Routing Optical Interconnection Network

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Chinese Journal of Lasers 1999年第6期8卷 3-5页

作者： JING Wencai ZHOU Ge ZHANG Yimo LIU Wei TIAN Jindong (College of Precision instrument & opto electronics Engineering, Tianjin University, opto electronic Information Science and tech.ology Lab., Tianjin 300072, China) 天津大学精密仪器与光电子工程学院光电信息技术科学开放实验室天津 300072 天津大学精密仪器与光电子工程学院光电信息技术科学开放实验室天津

In this paper, a two layer scalable wavelength routing optical interconnection network is presented. The top layer of the network is a multi wavelength bi directional optical bus which has high bandwidth and low latency; the sub layer of the network is single wavelength synchronous pipelined ring which has low communication latency and high scalability. The way to implement the optical system of the network is put forward, and the synchronous pipelined optical interconnect ring is designed and implemented.

关键词： wavelength routing optical interconnection network optical bus communication latency scalability

Plasmonic Mach-Zehnder interferometric sensor based on a metal-insulator-metal nanostructure

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Chinese Physics B 2017年第7期26卷 328-332页

作者：沈萌王鸣杜澜潘庭婷 Jiangsu Key Laboratory on opto-electronic tech.ology School of Physical Science and TechnologyNanjing Normal University

A plasmonic Mach-Zehnder interferometric sensor based on a semicircular aperture-slit nanostructure patterned on a metal-insulator-metal film is proposed and demonstrated by finite difference time domain（FDTD） simulation. Due to the interference between two different surface plasmon polariton modes in this design, the transmission spectra exhibit oscillation behaviors in a broad bandwidth, and can be readily tailored by changing the SPP path length and core layer thickness. Based on this principle, the characteristics of refractive index sensing are also demonstrated by simulation. This structure is illuminated with a collimated light source from the back side to avoid impacts on the interference. Meanwhile,these results show that the proposed structure is promising for portable, efficient, and sensitive biosensing applications.

关键词： surface plasmon polariton Mach-Zehnder interferometry metal-insulator-metal structures

Impact of Optical Hop Constraints on the IP/MPLS-over-WSON Networks CAPEX

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China Communications 2015年第11期12卷 112-118页

作者： LIU Fengqing Jaume Comellas School of opto-electronic Engineering Nanjing University of Posts and Telecommunications Dept.of Signal Theory and Communications Universitat Politècnica de Catalunya Barcelona

In this work,the impact of hop constraints on the CAPEX of multi-layer IP/MPLS over WSON networks is evaluated under different scenarios. By routing lightpaths with different number of transparent hops,the cost of networks varies significantly. This effect is thoroughly analyzed with a heuristic algorithm for different network topologies belonging to some European network operators. The main conclusion extracted is that limiting the transparent reach in such multi-layer networks can give a good tradeoff between CAPEX of IP/MPLS networks and WSON networks,and even lead to signifi cant savings in CAPEX when compared to longer lightpaths routing strategies.

关键词： IP/MPLS over WSON networks optical hop constraints CAPEX heuristics

A New Method for Locating Calculation of Arbitrary Spatial Straight Line or Plane in NC Machining

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厦门大学学报（自然科学版） 2002年第S1期41卷 149-150页

作者： YAN Shu-tian, LIU Tao, WU Zai-xin, HU Chi-bing, HU Li-zh i (College of Mechano-electronic Engineering, Gansu University of techn ology, Lanzhou 730050, China)

In the manufacturing process, we often encounter so me location machining of space arbitrary straight lines and planes that are not on ly unparalleled but also not vertical with the machine tool spindle or the cutti ng tool. In the past, we can do the location machining through the methods of dr awing line and making level in the ordinary machine tool. In the numerical contr ol machining of the CNC machine tool and manufacturing center, however, the spac e location and angle of the arbitrary straight lines and planes must be precisel y calculated in advance. So that precisely locating can be guaranteed in machini ng. Therefore, how to work out the space location angle of the arbitrary straigh t lines and planes to be machined both conveniently and precisely, turns out to be the must-be-solved chief problem in the numerical control machining. In thi s paper, through the deeply research of this problem, a new kind of calculating formula that calculates and defines the space location angle of the arbitrary st raight lines and planes by using the methods of analytic calculating. The formul a has been applied in the practical manufacturing calculation. It is proved that the new space angle calculating methods of arbitrary straight lines and planes is convenient in calculating and precise in locating. And it provides us a n ew, brief and precise calculating method in the numerical control machining of t he numerical control machine tool and manufacturing center.

关键词： arbitrary straight line arbitrary plane pr ojected angle inclination location

A Single-phase Spindle Motor Design for DVD Application

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Journal of Materials Science & tech.ology 2000年第2期16卷 250-255页

作者： D.R.Huang, T.F.Ying, L.T.Kuo, S.J.Wang, H.C.Huang and C. Y.Huang (opto-electronic & System Labs., ITRI, Chutung, Hsinchu, Taiwan-China) opto-electronic and System Labs. ITRI Chutung Hsinchu Taiwan

A single phase brushless spindle motor with innovative design has been developed for application in a DVD drive. The methods used to reduce the cogging torque and to improve the dynamic performance of this new design motor are proposed in this paper. The single phase brushless spindle motor is usually applied for cooling fan, pump and blower before the performance is improved by the reengineering process. The stator configuration and the drive circuit have been remodeled in order to meet the requirements of the spindle motor used in the DVD applications.

关键词： DVD Design