scholarly journals COMPARISON BETWEEN HAAR AND DAUBECHIES WAVELET TRANSFORMIONS ON FPGA TECHNOLOGY

2014 ◽  
pp. 23-29
Author(s):  
Fatma H. Elfouly ◽  
Mohamed I. Mahmoud ◽  
Moawad I. M. Dessouky ◽  
Salah Deyab
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Audio Signal ◽  
Design Procedure ◽  
Discrete Wavelet ◽  
Analysis Tool ◽  
Daubechies Wavelet ◽  
Daubechies Wavelets ◽  
Real Time Processing ◽  
Practical Applications

Recently, the Field Programmable Gate Array (FPGA) technology offers the potential of designing high performance systems at low cost. The discrete wavelet transform has gained the reputation of being a very effective signal analysis tool for many practical applications. However, due to its computation-intensive nature, current implementation of the transform falls short of meeting real-time processing requirements of most application. The objectives of this paper are implement the Haar and Daubechies wavelets using FPGA technology. In addition, the comparison between the Haar and Daubechies wavelets is investigated. The Bit Error Rat (BER) between the input audio signal and the reconstructed output signal for each wavelet is calculated. It is seen that the BER using Daubechies wavelet techniques is less than Haar wavelet. The design procedure has been explained and designed using the stat-of-art Electronic Design Automation (EDA) tools for system design on FPGA. Simulation, synthesis and implementation on the FPGA target technology has been carried out.

scholarly journals Minimization of Harmonics Noise Using Wavelet Transformation Technology

2011 ◽  
pp. 216-223
Author(s):  
Mr. Debasis Dash ◽  
Mr. Shatyaprakasha Satapathy ◽  
Dr. Chittaranjan Panda
Keyword(s):  
Wavelet Analysis ◽  
Wavelet Packet ◽  
Statistical Significance ◽  
Audio Signal ◽  
Design Procedure ◽  
Wavelet Packets ◽  
Threshold Function ◽  
Analysis Tool ◽  
Real Time Processing ◽  
Wavelet Spectra

The field programmable gate array technology can design high performance system at low cost for wavelet analysis. Wavelet transform has gained the reputation of being a very effective signal analysis tool for much practical application. Implementation of transform needs the meeting of real-time processing for most application. The objectives of this paper are to compare the Haar and Daubeches technology and to calculate the bit error rate (BER) between the input audio signal and reconstructed output signal. It is seen that the BER using Daubechies wavelet technology is less than Haar wavelet. The design procedure is explained using the stat of art electronic design. Automation tools for system design on FPGA, simulation, synthesis and implementation on the FPGA technology has been carried out. The power hovmoller, cross wavelet spectra and coherence are described. A Practical step-up-step guide to wavelet analysis is given with examples taken from time series. The guide includes a comparison to the windowed Fourier transform. New statistical significance test for wavelet power spectra are developed by deriving theoretical wavelet spectra for white and red noise. Empirical formula is given for the effect of smoothing on significance levels and filtering. The notion of orthogonal no separable trivet wavelet packets, which is the generation of orthogonal university wavelet packets is introduced. A de-noising method based on wavelet packet shrinkage is developed. The principle of wavelet packet shrinkage for de-noising and the section of thresholds and threshold function are analyzed.

A waste biomass derived hard carbon as a high-performance anode material for sodium-ion batteries

2016 ◽  
Vol 4 (34) ◽  
pp. 13046-13052 ◽  
Author(s):  
Pin Liu ◽  
Yunming Li ◽  
Yong-Sheng Hu ◽  
Hong Li ◽  
Liquan Chen ◽  
...  
Keyword(s):  
Anode Material ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Low Cost ◽  
Sodium Ion ◽  
Cycle Performance ◽  
Sodium Ion Batteries ◽  
Waste Biomass ◽  
Hard Carbon ◽  
Practical Applications

This study reports a hard carbon material derived from a waste biomass of corn cob and the influence of carbonized temperature on electrochemical performance. This study provides a promising anode material with low cost, high initial coulombic efficiency and excellent cycle performance, making sodium-ion batteries closer to practical applications.

Converting micro-sized kerf-loss silicon waste to high-performance hollow-structured silicon/carbon composite anodes for lithium-ion batteries

2020 ◽  
Vol 4 (9) ◽  
pp. 4780-4788 ◽  
Author(s):  
Qiang Ma ◽  
Jiakang Qu ◽  
Xiang Chen ◽  
Zhuqing Zhao ◽  
Yan Zhao ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Low Cost ◽  
Lithium Ion ◽  
Carbon Composite ◽  
Lithium Storage ◽  
Practical Applications ◽  
Storage Performance ◽  
Silicon Carbon ◽  
Composite Anodes

Low-cost feedstocks and rationally designed structures are the keys to determining the lithium-storage performance and practical applications of Si-based anodes for lithium-ion batteries (LIBs).

The Research and Design of Portable Leaf Disease Spots Image Acquisition System

2011 ◽  
Vol 128-129 ◽  
pp. 1480-1483
Author(s):  
Kai Song ◽  
Zhe Wang ◽  
Feng Ju Shen
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Image Acquisition ◽  
Processing System ◽  
Image Features ◽  
Acquisition System ◽  
Ultra Low Power ◽  
Real Time Processing ◽  
Leaf Disease ◽  
Image Acquisition System

The crop leaf disease spots image recognition technology has a great significance in identifying diseases and in effective spraying of pesticides to liminate diseases. We researched and designed the portable leaf disease spots image acquisition system since current PC-based processing system is high cost and lack of flexibility and real-timing, This system uses a high-performance 32-bit DSP chip based DM642 as its main processor, and also uses ultra-low power consumption and ultra-small size video decoder chips, large-capacity memories and high-performance communicator interfaces. As a result of the reasonable design of hardware architecture, this system realized leaf disease spots image features collecting and processing ，video transmitting, and achieved strong real-time processing capability, easy operation, low cost, anti-interference ability and other characteristics. The system prototype works well, and meets the design requirements.

An Infrastructure for Wireless Sensor-Cloud Architecture via Virtualization

2015 ◽  
pp. 143-170
Author(s):  
S. P. Anandaraj ◽  
S. Poornima
Keyword(s):  
Cloud Computing ◽  
High Performance ◽  
Critical Infrastructure ◽  
Low Cost ◽  
Real Time Processing ◽  
Infrastructure Monitoring ◽  
Efficient Management ◽  
Spatially Distributed ◽  
Reconfigurable Platform ◽  
Sensor Cloud

A typical WSN contains spatially distributed sensors that can cooperatively monitor the environment conditions, like second, temperature, pressure, motion, vibration, pollution and so forth. WSN applications have been used in several important areas, such as health care, military, critical infrastructure monitoring, environment monitoring, and manufacturing. At the same time. WSN Have some issues like memory, energy, computation, communication, and scalability, efficient management. So, there is a need for a powerful and scalable high-performance computing and massive storage infrastructure for real-time processing and storing the WSN data as well as analysis (online and offline) of the processed information to extract events of interest. In this scenario, cloud computing is becoming a promising technology to provide a flexible stack of massive computing, storage, and software services in ascalable and virtualized manner at low cost. Therefore, sensor-cloud (i.e. an integrated version of WSN & cloud computing) infrastructure is becoming popular nowadays that can provide an open flexible, and reconfigurable platform for several monitoring and controlling applications.

Design and Implementation of Multi Tone Modulation System Based on Sound Card

2014 ◽  
Vol 644-650 ◽  
pp. 3755-3758
Author(s):  
Dan Ren
Keyword(s):  
Virtual Instrument ◽  
High Performance ◽  
Low Cost ◽  
Audio Signal ◽  
Signal Acquisition ◽  
Sound Card ◽  
Development Platform ◽  
Actual Application ◽  
Signal Collection ◽  
Stable Performance

A multi tone modulation system design and development with a low-cost and high performance was developed, taking LabVIEW as the software development platform and the computer sound card as the hardware platform. The system is capable of audio signal acquisition, multi tone modulation, demodulation, waveform and spectrum analysis, and other functions. Actual application shows that the system is not only high accuracy, and reliable, stable performance, easy to operate and extensions. The signal collection technology based on the sound card and the combination of virtual instrument has a broad application prospect in engineering survey and practical teaching.

scholarly journals Nitrogen and Cobalt Co-Coped Carbon Materials Derived from Biomass Chitin as High-Performance Electrocatalyst for Aluminum-Air Batteries

Catalysts ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 954 ◽  
Author(s):  
Mi Wang ◽  
Jian Ma ◽  
Haoqi Yang ◽  
Guolong Lu ◽  
Shuchen Yang ◽  
...  
Keyword(s):  
Carbon Material ◽  
High Performance ◽  
Low Cost ◽  
Reduction Reaction ◽  
Discharge Voltage ◽  
Limiting Current ◽  
Alkaline Electrolyte ◽  
Hydrogen Electrode ◽  
Onset Potential ◽  
Practical Applications

Development of convenient, economic electrocatalysts for oxygen reduction reaction (ORR) in alkaline medium is of great significance to practical applications of aluminum-air batteries. Herein, a biomass chitin-derived carbon material with high ORR activities has been prepared and applied as electrocatalysts in Al-air batteries. The obtained cobalt, nitrogen co-doped carbon material (CoNC) exhibits the positive onset potential 0.86 V vs. RHE (reversible hydrogen electrode) and high-limiting current density 5.94 mA cm−2. Additionally, the durability of the CoNC material in alkaline electrolyte shows better stability when compared to the commercial Pt/C catalyst. Furthermore, the Al-air battery using CoNC as an air cathode catalyst provides the power density of 32.24 mW cm−2 and remains the constant discharge voltage of 1.17 V at 20 mA cm−2. This work not only provides a facile method to synthesize low-cost and efficient ORR electrocatalysts for Al-air batteries, but also paves a new way to explore and utilize high-valued biomass materials.

scholarly journals Approaching high-performance potassium-ion batteries via advanced design strategies and engineering

2019 ◽  
Vol 5 (5) ◽  
pp. eaav7412 ◽  
Author(s):  
Wenchao Zhang ◽  
Yajie Liu ◽  
Zaiping Guo
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Low Cost ◽  
Potassium Ion ◽  
Operating Voltage ◽  
Design Strategies ◽  
Research Strategies ◽  
Practical Applications ◽  
Electrode Cell ◽  
Key Issues

Potassium-ion batteries (PIBs) have attracted tremendous attention due to their low cost, fast ionic conductivity in electrolyte, and high operating voltage. Research on PIBs is still in its infancy, however, and achieving a general understanding of the drawbacks of each component and proposing research strategies for overcoming these problems are crucial for the exploration of suitable electrode materials/electrolytes and the establishment of electrode/cell assembly technologies for further development of PIBs. In this review, we summarize our current understanding in this field, classify and highlight the design strategies for addressing the key issues in the research on PIBs, and propose possible pathways for the future development of PIBs toward practical applications. The strategies and perspectives summarized in this review aim to provide practical guidance for an increasing number of researchers to explore next-generation and high-performance PIBs, and the methodology may also be applicable to developing other energy storage systems.

scholarly journals Design and fabrication of high performance photovoltaic based Controllable SnS/rGO hybrid composite: An excellent counter electrode for dye sensitized solar cell

2021 ◽  
Author(s):  
M. Indhumathy ◽  
A Praksam ◽  
H. H. Hegazy
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Tin Sulfide ◽  
Hydrothermal Route ◽  
Counter Electrodes ◽  
One Pot ◽  
Practical Applications ◽  
Dye Sensitized ◽  
Reduced Graphene ◽  
Composite Samples

Abstract To catalyse the decrease of triiodide in the electrolyte, state-of-the-art dye-sensitized sun directed cells (DSSCs) usually use respectable and uncommon Pt as counter electrodes, which greatly limits the practical applications of DSSCs. Appropriately, choices with low cost, fabulous electro- catalytic action, and predominant electrochemical stability to Pt are exceedingly looked for after. Herein, we report tin sulfide/reduced graphene oxide (SnS/rGO) composites are facile synthesized via a simple one-pot hydrothermal route and characterized by XRD, FESEM, Raman, UV-DRS, BET and PL studies. Due to the synergic effect between the SnS nanoparticles and rGO, these composite samples showed outstanding electro-catalytic property on reducing the triiodide. Therefore, the DSSC equipped with SnS/rGO nanocomposite CE achieved a power conversion efficiency (PCE) of 7.72%, which was higher than those of use SnS nanoparticles (5.21%). The improved mechanism of SnS/rGO nanocomposite was also discussed.

scholarly journals Photonic skins based on flexible organic microlaser arrays

2021 ◽  
Vol 7 (31) ◽  
pp. eabh3530
Author(s):  
Chunhuan Zhang ◽  
Haiyun Dong ◽  
Chuang Zhang ◽  
Yuqing Fan ◽  
Jiannian Yao ◽  
...  
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Low Cost ◽  
Single Mode ◽  
Direct Writing ◽  
Practical Applications ◽  
Single Mode Laser ◽  
Integrated Devices ◽  
Laser Sources ◽  
Mechanical Sensor

Flexible photonics is rapidly emerging as a promising platform for artificial smart skins to imitate or extend the capabilities of human skins. Organic material systems provide a promising avenue to directly fabricate large-scale flexible device units; however, the versatile fabrication of all-organic integrated devices with desired photonic functionalities remains a great challenge. Here, we develop an effective technique for the mass processing of organic microlaser arrays, which act as sensing units, on the chip of photonic skins. With a bilayer electron-beam direct writing method, we fabricated flexible mechanical sensor networks composed of coupled-cavity single-mode laser sources on pliable polymer substrates. These microlaser-based mechanical sensor chips were subsequently used to recognize hand gestures, showing great potential for artificial skin applications. This work represents a substantial advance toward scalable construction of high-performance and low-cost flexible photonic chips, thus paving the way for the implementation of smart photonic skins into practical applications.

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