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Modeling Photonic Crystal Devices by Dirichlet-to-Neumann Maps
Photonic crystals(PhCs) are important artificial materials.In recent years,they has been extensivly studied both theoretically and experimentally,due to their unusual ability to control and manipulate light.Because of the periodicity of the....
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High-speed Polarization Control in Optical Fiber and Polarization Encoding Communication
Polarization effect is a nonnegligible problem in the field of fiber technology.On the one hand,a large number of polarization problems in fiber system,for example, polarization dependent loss,polarization mode dispersion(PMD),depolarization....
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Study on Photosensitive Erbium Doped Optical Fibers and Bragg Grating-Assisted Coupler for Add/Drop F
In recent years,a focus on the study of optical fiber communication is AON,and it is the necessarily developing result for optical network.Rare earth doped fibers and all fiber optical add/drop filters become two of the Key Technologies in A....
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Studies on Optical Vestigial Sideband Modulation Formats and Key Techniques of OTDM System
At present the combination of DWDM with OTDM techniques has gradually become the main part of backbone of modern communication networks,which is regarded as the development of the ultra-high speed,ultra high capacity and ultra long haul opti....
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Some Key Issues on Energy-Efficient Methods for Wireless Sensor Networks
Wireless sensor networks are emerging technologies,which adopts distributed information processing techniques with high precision monitoring, fault-tolerant performance,large coverage areas,remote monitoring and many other advantages.It can....
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Study on Low-Power Technologies of High-Performance Embedded Processors
Entering the 21st Century,with the development of integrated circuit technologies,the development of microprocessor chip has encountered many opportunities and chanllenges.Power consumption is one of the main constraints of processor design.....
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High-utility Association Rule Mining
The association rule mining(ARM) aims at extracting interesting correlations between items,and is one of the most important tasks of data mining.ARM has been widely used in many fields such as scientific research,telecommunication networks,....
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Research on Self-Similarity and Bursty Network Traffic Thoery and Network Traffic Model Analysis
Recently, with kinds of mass multi-media applications being carried over the network, theories of network traffic model and researches on network traffic analysis have caught researchers’attentions in the fields of computer network and com....
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Research on Chirped Pulse Stacking Technique in High Power Laser Front-end System
The research work within this dissertation is supported by 863-804 project "The Simulation and Design of High Power Laser Front-end System" and the National Natural Science Foundation of China "Nonlinear Transmission Characteristics of High....
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Analysis and Applications of High-power Fiber Lasers
High-power lasers have long been an important research topic in laser optics. As a special kind of solid-state lasers,the fiber lasers find prospective applications in medical,optical communication,lidar,optical sensing,material processing,a....
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Research on Some Key Issues in Face Recognition under Complex Conditions
As the coming of the 21st century,face recognition is facing an important and difficult period.During the passed 40 years,a lot of theories and successful algorithms have been studied and proposed,and most key issues of face recognition unde....
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Research on Terminal Reconfigurability in Composite Reconfigurable Wireless Networks
The concept of composite reconfigurable wireless networks is becoming an important development orientation for the 4G wireless mobile communications in the future.The target of composite reconfigurable wireless networks is that multiple of h....
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Studies on Spin-polarized Transport Properties in a Fractal Semiconductor Multilayers Heterostructure
In this paper we investigate theoretically the spin-polarized transport properties of electrons tunneling through fractal semiconductor multilayers with two ferromagnetic contacts (F/FSM/F) in the presence of a spin-orbit interaction, which....
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Research on Key Techniques in Blind Demodulation of CPM-signal in Non-Cooperative Communication
Non-cooperative communication is an unauthorized accessing communication mode.The receiver demodulates the received signal by the modern signal processing technology which does not affect the user in common cooperative communication.In non-c....
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Research on Nonlinear Filtering with Application to Speaker Tracking
Speaker localization is one of the important techniques in acoustic signal processing, which have found many applications in fields such as speech enhancement, video-conferencing,human-computer interface,robot navigation,et al.Traditional ap....
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Research on the Field and Circuit Characteristics of Non-uniform Transmission Line
Transmission lines are important components in the modern communication system and microwave high-speed circuit.The non-uniform structures of the transmission line can cause reflection,radiation,and coupling to the surrounding circuit,especi....
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Unsupervised Structural Learning and Its Applications
The representation of data is one of the key in machine learning.Traditional methods usually represent the data as points in high dimensional space via feature vector. Due to its simplicity,great progress and developments have been made in m....
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Studies on Bionic Optimization Algorithms and Their Applications in Digital Image Processing
Digital image processing is one of the most active areas of computer applications.From the invention of CT,the popularity of digital cameras and the development of digital television services,to the applications of remote sensing image proce....
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Development of SiO_2 ILD Chemical Mechanical Polishing Slurry and Its Performance Analysis
Intergrated Circuit is the core of the electronic information industry and one of the most important high-tech to promote national economic and social development.From the IC manufacturing process,we can see that chemical mechanical polishin....
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Incremental Detection Method for Memory Access Overrun in Multi-loop Programs
Memory overrun belongs to a kind of dangerous and universal defects among several kinds of defect which are able to compromise safety and security of software system seriously.By it,Hackers can cause many types of denial-of-service vulnerabi....
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Adaptive Resource Allocation for Multi-Carrier Systems
Adaptive resource allocation for multi-carrier systems is studied in this thesis.Several adaptive resource allocation algorithms are proposed for OFDM systems with continuous bits, OFDM systems with discrete bits,and MIMO-OFDM systems with i....
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Multi-Label Classification with Its Application into Multimedia Analysis
Automatically annotating concepts for multimedia is a key to semantic-level video browsing,search and navigation.The research on this topic evolved through two paradigms.The first paradigm used binary classification to detect each individual....
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Ride Comfort Research on the Multifunctional Harvester and Dynamical Simulation
This thesis is finished based on the State Eleventh Five-year Scientific and Technological Support Project——The Research and Explore of the Multifunctional Key Technical Equipment on the Forest Harvesting and Cultivating Operation.This t....
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Research on Reputation Mechanism in Peer-to-Peer File Sharing System
The rapid development of Intemet has brought new challenge to the traditional network model,resulting in the emergence of P2P system.It makes the transfer of Internet computing model,from client/server model to peer-to-peer.At present,P2P te....
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Research on Some Key Problems of Reputation Mechanism in Peer-to-Peer Environments
While P2P technology has been widely deployed and successfully applied in the fields of stream media,file-sharing,content distribution,distributed storage management,distributed computing and so on,there still exists some issues need to be s....