Redesign Of Freshman Electrical Engineering Courses For Improved Motivation And Early Introduction Of Design,
2011
Portland State University
Redesign Of Freshman Electrical Engineering Courses For Improved Motivation And Early Introduction Of Design, Phillip Wong, Melinda Holtzman, Branimir Pejcinovic, Malgorzata Chrzanowska-Jeske
Electrical and Computer Engineering Faculty Publications and Presentations
The student experience during the freshman year has been recognized as one of the keys to not only attracting more students into engineering and improving retention, but also to forming some significant attributes of successful engineering graduates. Portland State University is an urban university, and its Electrical and Computer Engineering (ECE) department serves a relatively large and very diverse student population including a large fraction of transfer and part-time students. Traditionally, all engineering disciplines within our Maseeh College of Engineering and Computer Science had a similar freshman year curriculum. The common entry course – Engineering and Applied Science (EAS) 101 …
Efficient Packet Delivery In Modern Communication Networks,
2011
New Jersey Institute of Technology
Efficient Packet Delivery In Modern Communication Networks, Nan Wang
Dissertations
Modern communication networks are often designed for diverse applications, such as voice, data and video. Packet-switching is often adapted in today’s networks to transmit multiple types of traffic. In packet-switching networks, network performance is directly affected by how the networks handle their packets. This work addresses the packet-handling issues from the following two aspects: Quality of Service (QoS) and network coding.
QoS has been a well-addressed issue in the study of IP-based networks. Generally, nodes in a network need to be informed of the state of each communication link in order to make intelligent decisions to route packets according to …
Optimizing Resource Allocation In Next-Generation Optical Access Networks,
2011
New Jersey Institute of Technology
Optimizing Resource Allocation In Next-Generation Optical Access Networks, Jingjing Zhang
Dissertations
To meet rapidly increasing traffic demands caused by the popularization of Internet and the spouting of bandwidth-demanding applications, Passive Optical Networks (PONs) exploit the potential capacities of optical fibers, and are becoming promising future-proof access network technologies. On the other hand, for a broader coverage area and higher data rate, integrated optical and wireless access is becoming a future trend for wireless access. This thesis investigates three next-generation access networks: Time Division Multiplexing (TDM) PONs, Wavelength Division Multiplexing (WDM) PONs, and WDM Radio-Over-Fiber (RoF) Picocellular networks.
To address resource allocation problems in these three networks, this thesis first investigates respective …
Digital Image Forensics,
2011
New Jersey Institute of Technology
Digital Image Forensics, Fei Long
Theses
Digital image forensics is a relatively new research field that aims to expose the origin and composition of, and the history of processing applied to digital images. Hence, the digital image forensics is expected to be of significant importance to our modern society in which the digital media are getting more and more popular. In this thesis, image tampering detection and classification of double JPEG compression are the two major subjects studied. Since any manipulation applied to digital images changes image statistics, identifying statistical artifacts becomes critically important in image forensics. In this thesis, a few typical forensic techniques have …
Design And Evaluation Of An Adaptable Vector Coprocessor For Multicores,
2011
New Jersey Institute of Technology
Design And Evaluation Of An Adaptable Vector Coprocessor For Multicores, Timothy William Steele
Theses
Future applications for multi-core processor systems will require increased signal processing power along with increased resource utilization and decreased power consumption. Conservative power consumption will be of paramount importance primarily for battery-powered portable multi-core platforms (e.g., advanced cell phones, tablet computers, etc.). This thesis investigates the robustness, efficiency and effectiveness of vector coprocessor sharing policies in multi-core environments. Vector coprocessor sharing is based on an innovative design for a vector lane that forms the building block for the creation of larger vector coprocessors. This innovative lane design contains a floating-point multiply unit, a floating-point add/subtract unit, a miscellaneous function unit, …
Underwater Localization And Tracking Of Physical Systems,
2011
University of Connecticut
Underwater Localization And Tracking Of Physical Systems, Patrick E. Carroll
Master's Theses
In this paper, we investigate the problem of localizing an underwater sensor node basedon message broadcasting from multiple surface nodes. With the time-of-arrival measurementsfrom a DSP-based multicarrier modem, each sensor node localizes itself based on the traveltime differences among multiple senders to the receiver. Using one-way message passing, such asolution can scale to accommodate a large number of nodes in a network. We consider the issuefrom not only the physical layer, but also at the node processing layer by incorporating a trackingsolution. We present simulation results as well as preliminary testing results in a swimming poolwith both stationary and moving …
Influence Of Tert-Butylpyridine On The Band Energetics Of Nanostructured Tio2 Electrodes And The Photoelectrochemical Properties Of Dye-Seneitized Electrodes,
2011
College of Chemistry and Chemical Engineering, Institute of Applied Chemistry, Xinyang Normal University, Henan, China, 464000;
Influence Of Tert-Butylpyridine On The Band Energetics Of Nanostructured Tio2 Electrodes And The Photoelectrochemical Properties Of Dye-Seneitized Electrodes, Shu-Ming Yang, Ji-Chao Wang, Hui-Zhi Kou, Hong-Bin Xue, Hong-Jun Wang, Yu-Ling Guo
Journal of Electrochemistry
The flat band edges (Efb) of nanostructured TiO2 electrodes in electrolyte solutions with tert-butylpyridine (TBP) of different concentrations have been determined with spectroelectrochemical technique. TBP played a role in band energetics of nanostructured TiO2 electrodes. The Efb values of -2.25, -2.46 and -2.62 V were determined in three 0.2 mol•L-1 tetrabutylammonium perchlorate (TBAP) acetonitrile electrolytes which contain 0, 0.2 and 0.4 mol•L-1 TBP respectively. The addition of Li+ ions shifted Efb positively. The Efb values of -1.12, -1.22 and -1.30 V were determined in three 0.2 mol•L-1 LiClO4 acetonitrile electrolytes which contain 0, 0.2 …
Electrochemical Capacitive Performance Of Mesoporous Carbon Based Co-Ni Oxides,
2011
1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;
Electrochemical Capacitive Performance Of Mesoporous Carbon Based Co-Ni Oxides, Zhen-Sheng Yang, Ling-Bin Kong, Li Deng, Yong-Chun Luo, Long Kang
Journal of Electrochemistry
By using defects on the surface of CMK-3 served as nucleation center, Co0.25Ni0.75 oxide/C composite was successfully prepared through a simple chemical co-precipitation method. Characterization was carried by using X-ray diffraction, BET and scanning electron microscopy. Results showed that a perfect mesoporous network of interconnected nanoflakes was obtained for Co0.25Ni0.75 oxide/C composite and, this material has a less crystallization, interconnected nanoflakes network structure and a narrow mesoporous distribution at about 3~4 nm. The highly dispersed and loosely packed Co0.25Ni0.75 oxide/C composite possessed good electrochemical accessibility and fast diffusion rate of OH …
Effect Of Pore Size On Pseudo-Capacitive Performance Of Nio In The Mixed Electrolyte Of Koh And Hexacyanoferrate,
2011
Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China;
Effect Of Pore Size On Pseudo-Capacitive Performance Of Nio In The Mixed Electrolyte Of Koh And Hexacyanoferrate, Wen Wu, Meng-Yan Hou, Dan-Dan Zhou, Yong-Yao Xia
Journal of Electrochemistry
In this paper, five kinds of NiO samples with different pore size distributions were synthesized .The electrochemical capacitance of the samples were characterized in 3 mol/L KOH solution with and without hexacyanoferrate addition. Electrochemical test results indicated the NiO sample with an optimum pore size of about 15 nm shows high Coulombic efficiency of the N4(NiO) electrode as the redox reaction of hexacyanoferrate ions would be limited in the pore, thus prevent ion diffusion into the bulk electrolyte solution .
Preparation And Performance Of Carbon-Coated Si/C Composites,
2011
Li-ion Batteries Lab, School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China;
Preparation And Performance Of Carbon-Coated Si/C Composites, Li-Li Du, Quan-Chao Zhuang, Tao Wei, Yong-Li Cui, Zhi Sun, Shi-Gang Sun
Journal of Electrochemistry
Si/C composite for lithium ion batteries was obtained by pyrolyzing and ball-milling. The microstructure and component of the composite was characterized by SEM and XRD, the electrochemical performance was investigated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and galvano static charge-discharge tests. The results illustrate that the particle of Si/C composite prepared by pyrolysis exhibits inerratic morphology, uniform carbon-coating layer, good electrical conductivity, low resistance. The first intercalated-lithium capacity of the composite material is 4495 mAh/g; the first coulomb efficiency is 65.3%. From the second week the coulomb efficiency maintains 97%, and the capacity at the 100th cycle can …
Research Progress In Orthosilicates As Cathode Materials For Li-Ion Batteries,
2011
State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Department of Chemistry, Xiamen University, Xiamen, 361005 (P. R.China);
Research Progress In Orthosilicates As Cathode Materials For Li-Ion Batteries, Dong-Ping Lv, Lin Wang, Yong Yang
Journal of Electrochemistry
Rechargeable Li-ion batteries fulfilling high-energy density, high safety, environmental friendliness, and low cost are demanded urgently for energy storage systems. Besides the structure stability arising from the strong Si-O covalent bond, environmental benignancy and low cost from the characteristics of Fe, Mn, Si elementals, orthosilicates (Li2MSiO4) show promising prospect to meet the demand of high-energy density for its two available Li+ per formula unit. Motivated by these significant advantages, Li2MSiO4 have been intensively investigated in the past few years. In the present work, we gave a review on the progress of orthosilicate research …
Study On Direct Electro-Oxidation Of Anisaldehyde,
2011
College of Chemical Engineering and Materials Science of Zhejiang University of Technology, State Key Laboratory Breeding Base of Green Chemistry, Zhejiang University of Technology, Hangzhou 310032, Zhejiang,China;
Study On Direct Electro-Oxidation Of Anisaldehyde, Lin-Lin Wu, Ying-Hong Zhu, Shan-Shan Li, Hong-Yan Zeng, Chun-An Ma
Journal of Electrochemistry
The oxidation of anisole on Pt electrode was investigated by cyclic voltammery and constant potential electrolysis. The influence of scan rates, substrate concentration, supporting electrolytes and solvent were considered . The results show that the electro-oxidation process of anisole was irreversible. In this research the sulfuric acid was the best supporting electrolytes and acetone was the best solvent, and the process was controlled by diffusion . The product of constant potential electrolysis was charactered by GC-MS .The results show that the main products was anisaldehyde, and the selectivity was up to 66.5% when using acetone as solvent.
Electric Vehicles And Power Batteries,
2011
Key Lab. ofElectrochemical Power Souree, Hubei Province, College ofChemistry andMolecular Sciences, Wuhan University, Wuhan 430072.China
Electric Vehicles And Power Batteries, Xin-Ping Ai, Han-Xi Yang
Journal of Electrochemistry
In retrospect of the historical development of Electric Vehicles (EV), the impact of battery technologies on the progress of EV was discussed. In consequence, it is concluded that the lack of advanced batteries was the main cause for the fluctuations of EV development and the sluggish commercialization of electric cars in the past century. After a brief introduction to the classification and the requirements of electric vehicles, the main issues of the batteries including safety, temperature range for operation and the cost as well as the effects of these factors on the applications of advanced batteries for electric vehicles were …
Comparison Of Catalytic Performance On Different Materials Supported Pd Catalysts For Formic Acid Oxidation,
2011
1. College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R.China
Comparison Of Catalytic Performance On Different Materials Supported Pd Catalysts For Formic Acid Oxidation, Su-Dong Yang, Yan-Yu Liang, Zhu-Liang Wen, Qi-Jun Song, Xiao-Gang Zhang
Journal of Electrochemistry
Graphite oxide (GO) was prepared from by Hummers method. Then the graphene nanosheets supporting Pd catalysts were prepared by a single-step chemical reduction method. The electrocatalytic performance for formic acid oxidation of the prepared Pd/graphene composite was studied as an electrode material in comparison with the composite catalysts based on the other carbons (MWCNTs, SWCNTs, and Vulcan XC-72 carbon black). X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements indicated that the Pd nanoparticles were well dispersed on the surface of the graphene nanosheets with a small particle size. The electrocatalytic oxidation of formic acid was studied by electrochemically active …
Synthesis And Catalytic Property Of Flaked Spindle-Like Cuo Nanocrystals,
2011
1. Department of Chemistry, Xinzhou Teachers’ University, Shanxi Xinzhou 034000, China; 2.Department of Chemistry, Beijing Normal University, Beijing 100875, China;
Synthesis And Catalytic Property Of Flaked Spindle-Like Cuo Nanocrystals, Jian-Feng Fan, Li-Qing Li, Yu-Feng Huang, Lou-Zhen Fan
Journal of Electrochemistry
A simple and efficient electrochemical route was developed for the synthesis of flaked spindle-like CuO nanocrystals using aqueous electrolyte and Cu sacrificial anode (graphite as the cathode) in an undivided cell at a constant potential mode under room temperature. The morphologies, structure and component of CuO nanocrystals obtained were characterized by SEM, XRD, respectively. Flaked spindle-like CuO nanocrystals were successfully used to modify a GC electrode to detect H2O2 with cyclic voltammetry (CV) and amperometric (AC).The results showed that products were pure monoclinic CuO nanocrystals. The linear range for the determination of hydrogen peroxide is from 1.0 …
Investigation Of Supercapacitors Based On Polyvinyl Alcohol Hydrogel-Polymer Electrolyte,
2011
Academy of Material Science and Engineering, Huaqiao University, Quanzhou 362021, China;
Investigation Of Supercapacitors Based On Polyvinyl Alcohol Hydrogel-Polymer Electrolyte, Kai-Qing Xu, Le-Qing Fan, Ji-Huai Wu, Qing Leng, Xin Zhong, Jian-Ming Lin, Miao-Liang Huang, Zhang Lan
Journal of Electrochemistry
For the first time, the supercapacitor based on the hydrogel-polymer electrolyte which consisted of the cross-linking of polyvinyl alcohol-glutaraldehyde (PVA-GA) using 2-acrylamido-2-methyl propane sulfonic acid (AMPS) as solicitation reagent was assembled. The gel polymer electrolyte was characterized by FTIR and AC impedance. The maximum ionic conductivity is 1.23 mS/cm at room temperature. The electrochemical properties of the supercapacitor were investigated by cyclic voltammetry, AC impedance spectra and constant current charge-discharge curve. The results show that the specific capacitance reachs 139 F/g with AMPS of 1.0 g and 0.05 mL of 5 %(by mass) GA. And the specific capacitance still retained …
Detection Of Acute Promyelocytic Leukemia Pml/Rarî± Fusion Gene Using Graphene Modified Glassy Carbon Electrode,
2011
1. Department of Pharmaceutical Analysis of the Fujian Meidical University, Fuzhou 350004,China; ;
Detection Of Acute Promyelocytic Leukemia Pml/Rarî± Fusion Gene Using Graphene Modified Glassy Carbon Electrode, Zhi-Xian Lian, Guang-Xian Zhong, Kun Wang, Ai-Lin Liu, Xin-Hua Lin, Yuan-Zhong Chen
Journal of Electrochemistry
A graphene modified glassy carbon electrode (GCE) was prepared by electrochemical reduction of graphite oxide fixed on the surface of GCE. Then, the amino-group modified probe of acute promyelocytic leukemia (APL) PML/RARα fusion gene fragment was immobilized onto surface of the graphene modified GCE by coupling activating agent. With methylene blue (MB) as a novel electrochemical indicator, artificial APL PML/RARα fusion gene fragment was measured by differential pulse voltammetry (DPV). The result indicated graphene nanomaterial showed good sensitization on the signal of MB. The relationship between the reduction peak current of MB and the concentration of complementary strand was linear …
Dft Study Of Co2 Reduction To Hydrocarbons On Cu Surfaces,
2011
2. College of Chemistry and Chemical Engineering, Hunan University of Arts and Science, Changde 415000 Hunan, China
Dft Study Of Co2 Reduction To Hydrocarbons On Cu Surfaces, Li-Hui Ou, Sheng-Li Chen
Journal of Electrochemistry
CO2 reduction on Cu(111) single crystal surfaces was studied using DFT calculations on the reaction energies and the minimum energy paths. The results indicated that the possible reaction paths for CO2 reduction on Cu(111) surface are CO2(g) + H* → COOH* → (CO +OH)*, (CO + H)* → CHO*, CHO + H → CH2O* → (CH2+O)*, CH2* + 2H* → CH4 or 2CH2* → C2H4. On Cu(111) surface, the reaction rate is controlled by steps of CH2O* → (CH2 …
Anode Electrodeposition Of Ti/Mno2 Electrode And Electrocatalytic Oxidization Properties Of Phenol Degradation,
2011
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin150001, Heilongjiang, China
Anode Electrodeposition Of Ti/Mno2 Electrode And Electrocatalytic Oxidization Properties Of Phenol Degradation, Ye Chen, Wen-Li Zhao, Qing Wen
Journal of Electrochemistry
Ti-base manganese dioxide (Ti/MnO2) electrode was prepared by anodically electrodeposition technology in this paper. The structure of the electrode, the microstructure of the electrode surface and the element composition of the electrode were analyzed by XRD, SEM and EDS. The preparation process parameters of the electrode were studied in detail with the help of the V~logi curve and phenol degradation curve. The Ti/MnO2 electrode was anodically electrodeposited at current density 4mA•cm-2, the Mn2 + ions concentration 0.5mol•L-1 and temperature70℃. The V~logi curve and phenol degradation curve were used to evaluate electrocatalytic oxidization properties …
Electrochemical Studies Of Zinc Injection Into The Structure Materials Of Nuclear Power Plants,
2011
School of Environment Science and Engineering, North China Electric Power University.Baoding 071000,Hebei, China
Electrochemical Studies Of Zinc Injection Into The Structure Materials Of Nuclear Power Plants, Sheng-Han Zhang, Yu Tan, Ke-Xin Liang
Journal of Electrochemistry
The electrochemical and semiconductor characters of oxide films formed on 304L, 316L stainless steel and alloy 600 in high temperature water with zinc addition were studied. Stress corrosion cracking and occupational radiation can be retarded effectively by zinc injection to the primary circuit of pressurized water reactor (PWR). The semiconductor characters of the materials formed by zinc injection was analyzed by Mott-Schottky curves. The surface morphology and components of the corrosion oxide layer were examined and detected by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The result reveals that the smaller crystals and the complex Zn-Cr-Ni-Fe oxide were …
