Numerical Optimization Of A Three-Chamber Muffler Hybridized With A Side Inlet And A Perforated Tube By Sa Methodm,
2010
Department of Automatic Control Engineering, ChungChou Institute of Technology, 6, Lane 2, Sec. 3, Shanchiao Rd., Yuanlin, Changhua 51003, Taiwan, R.O.C.
Numerical Optimization Of A Three-Chamber Muffler Hybridized With A Side Inlet And A Perforated Tube By Sa Methodm, Min-Chie Chiu
Journal of Marine Science and Technology–Taiwan
Research on new techniques of multi-chamber mufflers equipped with a side inlet and an internal non-perforated tube has been well addressed and developed; however, the research work of multi-chamber mufflers in conjunction with side inlet and internal perforated tubes which may efficiently increase the acoustical performance is rare. Therefore, the main purpose of this paper is to not only analyze the sound transmission loss (STL) of three-chamber side mufflers with a perforated tube but also to optimize their best design shape under a limited space. In this paper, both the generalized decoupling technique and plane wave theory in solving the …
The Role Of Non-Financial Features Related To Corporate Governance In Business Crisis Prediction,
2010
Department of Business Management, National Taipei University of Technology
The Role Of Non-Financial Features Related To Corporate Governance In Business Crisis Prediction, Fengyi Lin, Deron Liang, Wing-Sang Chu
Journal of Marine Science and Technology–Taiwan
Recent outbreak of corporate financial crises worldwide has brought attention to the need for a new international financial architecture which rests on crisis prediction and crisis management. It is therefore both desirable and vital to explore new predictive techniques for providing early warnings aganist bankruptcy. Financial data have been widely used by researchers to predict financial distress or business crisis, but few studies exploit the use of non-financial indicators related to corporate governance to construct business crisis prediction model. This article introduces into the field of business crisis prediction model based on a combination of both financial and corporate governance …
Vector Quantization Based On Steady-State Memetic Algorithm,
2010
Department of Electronics Engineering, Ching-Yun University, Chungli, Taiwan, R.O.C
Vector Quantization Based On Steady-State Memetic Algorithm, Chien-Min Ou
Journal of Marine Science and Technology–Taiwan
A novel memetic algorithm (MA) for the design of vector quantizers (VQs) is presented in this paper. The algorithm uses steady-state genetic algorithm (GA) for the global search and K-means algorithm for the local improvement. As compared with the usual MA using the generational GA for global search, the proposed MA dramatically reduces the computational time for VQ training. In addition, it attains a near global optimal solution, and its performance is insensitive to the selection of initial codewords. Numerical results show that it can save more than 70% of computation time while maintaining a comparable performance as previous MA
Vfife Method Applied For Offshore Template Structures Upgraded With Damper System,
2010
Department of Marine Environment and Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan.
Vfife Method Applied For Offshore Template Structures Upgraded With Damper System, Po-Yen Chang, Hsien Hua Lee, Guo-Wei Tseng, Pei-Yin Chung
Journal of Marine Science and Technology–Taiwan
In this study, a plane frame element derived from vector form intrinsic finite element (VFIFE) method is adapted and applied to study the dynamic responses of an offshore template platform subject to wave forces. Furthermore, this vector form intrinsic finite element is modified in order to incorporate a visco-elastic material, which has excellent energyabsorption ability, to a damping device installed in the structural system to mitigate the wave-induced vibration. The method adopted in this study is a scheme similar to the one by updating the geometry of the structural system during the calculation of each time step, which is also …
Design And Application Of An Image-Processing-Based Fuzzy Autopilot For Small-Boat Approaching Maneuvers,
2010
Department of Transportation Science, National Taiwan Ocean University, Keelung, Taiwan, R.O.C
Design And Application Of An Image-Processing-Based Fuzzy Autopilot For Small-Boat Approaching Maneuvers, Sin-Der Lee, Ching-Yaw Tzeng, Young-Zehr Kehr, Chih-Kai Kang, Chi-Chun Huang
Journal of Marine Science and Technology–Taiwan
This paper presents an image-processing-based fuzzy autopilot scheme for accomplishing small-boat approaching maneuvers in a harbor environment. In the proposed approach, two canvas targets are arranged in cascade on the quayside to form a leading line. The targets are detected by a charge coupled device (CCD) camera mounted on the bow of the boat, and their geometric centers are computed by a Hue- and Saturation-based image-processing scheme. The autopilot system calculates the current heading deviation and tracking deviation angles of the boat by analyzing the displacements of the target centers relative to the CCD center line. These angles are then …
Layered Frequency-Domain Turbo Equalization For Single Carrier Broadband Mimo Systems,
2010
Missouri University of Science and Technology
Layered Frequency-Domain Turbo Equalization For Single Carrier Broadband Mimo Systems, Jian Zhang, Yahong Rosa Zheng, Jingxian Wu
Electrical and Computer Engineering Faculty Research & Creative Works
A new layered frequency-domain turbo equalization (LFDTE) scheme is proposed for single carrier (SC) multiple input multiple-output (MIMO) systems. the proposed scheme combines the respective advantages of layered detection and turbo equalization to further lower the bit error rate (BER) for high-data-rate communications. Different from the traditional frequency-domain turbo equalization (FDTE) method for MIMO systems, our new detection algorithm employs a layered structure in each turbo iteration, and at each layer a group of best data streams is detected in the form of soft symbols and then canceled from the received signals in frequency domain. the extrinsic information for the …
Opportunistic Relaying For Multi-Antenna Cooperative Decode-And-Forward Relay Networks,
2010
Missouri University of Science and Technology
Opportunistic Relaying For Multi-Antenna Cooperative Decode-And-Forward Relay Networks, Weiliang Zeng, Chengshan Xiao, Youzheng Wang, Jianhua Lu
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, we investigate the relaying scheme for multi-antenna cooperative networks without channel state information at the transmitters. It is shown that the classic opportunistic relaying scheme, which allows only one relay node to forward the message, may lead to significant loss when it is extended to the corresponding multi-antenna relay scenarios. a generalized opportunistic relaying approach, which selects more transmit antennas distributed on multiple relay nodes to transmit data simultaneously, is proposed to maximize the network throughput via balancing the source-relay and the relay-destination channels. Numerical examples show the large impact of multiple antennas and relays on the …
Low-Complexity Turbo Block Decision Feedback Equalization For Mimo Systems,
2010
Missouri University of Science and Technology
Low-Complexity Turbo Block Decision Feedback Equalization For Mimo Systems, Jun Tao, Jingxian Wu, Yahong Rosa Zheng
Electrical and Computer Engineering Faculty Research & Creative Works
This paper proposes a low-complexity turbo block decision feedback equalizer (BDFE) with reliability-Based successive soft interference cancellation (SSIC) for multiple-input multiple-output (MIMO) systems. Turbo equalization in MIMO systems needs to combat both InterSymbol interference (ISI) due to frequency-selective fading and multiplexing interference (MI) among data streams transmitted by different antennas. the proposed MIMO BDFE performs SSIC on both ISI in the time domain and MI in the space domain. for an SSIC receiver, the order in which the symbols are detected and canceled is critical to the system performance, yet it is often overlooked in the literature. We propose a …
Solving Multi-Scale Low Frequency Electromagnetic Problems,
2010
Missouri University of Science and Technology
Solving Multi-Scale Low Frequency Electromagnetic Problems, Zhi Guo Qian, Mao Kun Li, Zu Hui Ma, Li (Lijun) Jun Jiang, Weng Cho Chew
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, we will discuss two methods to tackle the low-frequency, multi-scale electromagnetics problem. First we will discuss the augmented electric field integral equation (AEFIE), and then, we will discuss the equivalence principle algorithm (EPA). The AEFIE allows the solution of such problems without the need to perform a loop search of a complex structure. The EPA allows the separation of circuit physics from wave physics in a multiscale problem. Hybridization of these two methods will be discussed.
Tracking Simultaneous Time-Varying Power Harmonic Distortions Using Filter Banks,
2010
Universidade Federal de Juiz de Fora
Tracking Simultaneous Time-Varying Power Harmonic Distortions Using Filter Banks, Carlos A. Duque, Paulo M. Silveira, Thomas L. Baldwin, Paulo F. Ribeiro
University Faculty Publications and Creative Works
Although it is well known that the Fourier analysis is only accurately applicable to steady-state waveforms, it is a widely used tool to study and monitor time-varying signals, such as are commonplace in electrical power systems. The disadvantages of the Fourier analysis, such as frequency spillover or problems due to sampling (data window) truncation can often be minimized by various windowing techniques, but they nevertheless exist. This paper demonstrates that it is possible to track and visualize amplitude and time-varying power systems harmonics, without frequency spillover caused by classical time-frequency techniques. This new tool allows for a clear visualization of …
Low-Loss Hollow Waveguide Platforms For Optical Sensing And Manipulation,
2010
Brigham Young University - Provo
Low-Loss Hollow Waveguide Platforms For Optical Sensing And Manipulation, Evan J. Lunt
Theses and Dissertations
This dissertation presents a method for fabricating integrated hollow and solid optical waveguides on planar substrates. These waveguides are antiresonant reflecting optical waveguides (ARROWs), where high-index cladding layers confine light to hollow cores through optical interference. Hollow waveguides that can be filled with liquids or gases are an important new building block for creating highly-integrated optical sensors. The method developed for fabricating these integrated waveguides employs standard processes and materials used in the microelectronics industry, allowing for parallel, low-cost fabrication. Dielectric cladding layers are deposited on a silicon wafer using plasma-enhanced chemical vapor deposition (PECVD). After the lower cladding layers …
A Monocular Marker-Free Gait Measurement System,
2010
Technological University Dublin
A Monocular Marker-Free Gait Measurement System, Jane Courtney, Annraoi M. De Paor
Articles
This paper presents a new, user-friendly, portable motion capture and gait analysis system for capturing and analyzing human gait, designed as a telemedicine tool to monitor remotely the progress of patients through treatment. The system requires minimal user input and simple single-camera filming (which can be acquired from a basic webcam) making it very accessible to nontechnical, nonclinical personnel. This system can allow gait studies to acquire a much larger data set and allow trained gait analysts to focus their skills on the interpretation phase of gait analysis. The design uses a novel motion capture method derived from spatiotemporal segmentation …
Channel Equalization For Single Carrier Mimo Underwater Acoustic Communications,
2010
Missouri University of Science and Technology
Channel Equalization For Single Carrier Mimo Underwater Acoustic Communications, Chengshan Xiao, Jun Tao, Yahong Rosa Zheng, T. C. Yang, Wen Bin Yang
Electrical and Computer Engineering Faculty Research & Creative Works
Multiple-input multiple-output (MIMO) underwater acoustic (UWA) channels introduce both space-time interference (STI) and time-varying phase distortion for transmitted signals. in such cases, the equalized symbols produced by conventional equalizer aiming for STI cancelation suffer phase rotation and thus cannot be reliably detected. in this paper, we propose a new equalization scheme for high data rate single carrier MIMO UWA channels. Different from existing methods employing joint equalization and symbol wise phase tracking technology, the proposed scheme decouples the interference cancelation (IC) operation and the phase compensation operation, leading to a generalized equalizer structure combining an IC equalizer with a phase …
Thin Film Microfluidic And Nanofluidic Devices,
2010
Brigham Young University - Provo
Thin Film Microfluidic And Nanofluidic Devices, Mark Noble Hamblin
Theses and Dissertations
Lab-on-a-chip devices, also known as micro total analysis systems (μTAS), are implementations of chemical analysis systems on microchips. These systems can be fabricated using standard thin film processing techniques. Microfluidic and nanofluidic channels are fabricated in this work through sacrificial etching. Microchannels are fabricated utilizing cores made from AZ3330 and SU8 photoresist. Multi-channel electroosmotic (EO) pumps are evaluated and the accompanying channel zeta potentials are calculated. Capillary flow is studied as an effective filling mechanism for nanochannels. Experimental departure from the Washburn model is considered, where capillary flow rates lie within 10% to 70% of theoretical values. Nanochannels are fabricated …
Growth And Characterization Of Non-Polar Gan Materials And Investigation Of Efficiency Droop In Ingan Light Emitting Diodes,
2010
Virginia Commonwealth University
Growth And Characterization Of Non-Polar Gan Materials And Investigation Of Efficiency Droop In Ingan Light Emitting Diodes, Xianfeng Ni
Theses and Dissertations
General lighting with InGaN light emitting diodes (LEDs) as light sources is of particular interest in terms of energy savings and related environmental benefits due to high lighting efficiency, long lifetime, and Hg-free nature. Incandescent and fluorescent light sources are used for general lighting almost everywhere. But their lighting efficiency is very limited: only 20-30 lm/W for incandescent lighting bulb, approximately 100 lm/W for fluorescent lighting. State-of-the-art InGaN LEDs with a luminous efficacy of over 200 lm/W at room temperature have been reported. However, the goal of replacing the incandescent and fluorescent lights with InGaN LEDs is still elusive since …
A New Adaptive Compression Scheme For Data Aggregation In Wireless Sensor Networks,
2010
Missouri University of Science and Technology
A New Adaptive Compression Scheme For Data Aggregation In Wireless Sensor Networks, Priya Kasirajan, Carl Larsen, S. Jagannathan
Electrical and Computer Engineering Faculty Research & Creative Works
Wireless sensor nodes typically have limited processing capabilities and are powered by batteries. the amount of energy expended in transmitting a single data bit would be several orders of magnitude higher when compared to the energy needed for a 32-bit computation. Thus, to maximize network lifetime, data transmissions should be minimized without losing vital information. in this paper, a novel adaptive compression scheme using nonlinear estimation theory is proposed for data aggregation. Satisfactory performance of the proposed compression scheme in the presence of noise, distortion, and quantization errors is demonstrated using Lyapunov approach. the proposed scheme is contrasted with existing …
A New Receiver Placement Scheme Using Delaunay Refinement-Based Triangulation,
2010
Missouri University of Science and Technology
A New Receiver Placement Scheme Using Delaunay Refinement-Based Triangulation, Mohammed Rana Basheer, Sarangapani Jagannathan
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, a sub-optimal solution to the receiver placement and number of receiver determination problem is introduced. to achieve this overall goal, first, localization error for a received signal strength indicator (RSSI)-Based N-receiver system localizing a transmitter is estimated. Subsequently, this estimator error along with the 2D-tessellation techniques such as Delaunay refinement are used to position candidate receivers not only to minimize their number needed to meet the location error threshold but also to reduce the dilution of localization accuracy due to the layout of receivers. Rigorous mathematical analysis indicates that the receiver count generated by our Delaunay Refinement-Based …
Improving Electromagnetic Compatibility Performance Of Packages And Sip Modules Using A Conformal Shielding Solution,
2010
Missouri University of Science and Technology
Improving Electromagnetic Compatibility Performance Of Packages And Sip Modules Using A Conformal Shielding Solution, Nozad Karim, Jingkun Mao, Jun Fan
Electrical and Computer Engineering Faculty Research & Creative Works
High-speed digital and wireless devices radiate unintentional electromagnetic noise, which can affect the normal operation of other devices within the same system, causing intra-system electromagnetic interference (EMI) problems, or contribute to the total radiated EMI from the system, resulting in potential system-level EMI issues. PCB and system level shielding may alleviate the system-level EMI between wireless PCB board and the outside environment, but seldom prevent the intra-system EMI within the shielding enclosure. Package and System in Package (SiP) level shielding is desirable to shield the unintended radiation and protect the other circuits on board. Traditionally an external metal lid is …
Electrical Modelling Of Temperature Distributions In On-Chip Interconnects, Packaging, And 3d Integration,
2010
Missouri University of Science and Technology
Electrical Modelling Of Temperature Distributions In On-Chip Interconnects, Packaging, And 3d Integration, Lijun Jiang, Chuan Xu, Howard Smith, Barry Rubin, Alina Deutsch, Alain Caron
Electrical and Computer Engineering Faculty Research & Creative Works
In this talk, we will introduce a novel methodology using existing electromagnetic modelling tools for interconnect and packaging structures to simulate and model the temperature distribution without major modifications to these tools or simulated structures. This methodology can easily be integrated with the chip technology information and frame an electrical circuit simulator into an automatic, template-based simulation and optimization flow. A new accurate closed-form thermal model is further developed to simplify unnecessary object details. The model allows an equivalent medium with effective thermal conductivity (isotropic or anisotropic) to replace details in non-critical regions accurately so that complex interconnect structures can …
Analysis Of Mutual Inductance Effect Between Decoupling Capacitors On Planar Power Bus,
2010
Missouri University of Science and Technology
Analysis Of Mutual Inductance Effect Between Decoupling Capacitors On Planar Power Bus, Jingook Kim, Bruce Archambeault, James L. Knighten, Jun Fan
Electrical and Computer Engineering Faculty Research & Creative Works
The physics associated with mutual inductance between vias has been analyzed, and a method has been proposed to calculate the total equivalent inductance including the effect of mutual inductance. the method has been further simplified to an expression in a closed form. the equations have also been verified and shown to be accurate by measurements. © 2010 IEEE.
