OCEANS 2006 - Asia Pacific最新文献_第3页

Identification and Analysis of Dolphin Signatures from Ocean Ambient Noise Measurements 海洋环境噪声测量中海豚特征的识别与分析

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393825

G. Latha, S. Ramji

引用次数: 3

Efficient Active Sonar Parameter Estimation Using Linear FM Signals via Hermite Decompositions 基于Hermite分解的线性调频信号有效主动声纳参数估计

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393951

M.R. Sharif, S. Abeysekera

引用次数: 0

Broadband FIR Beamformer for Underwater Aoustic Communication 用于水声通信的宽带FIR波束形成器

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393847

Youngchol Choi, Yong-Kon Lim

{"title":"Broadband FIR Beamformer for Underwater Aoustic Communication","authors":"Youngchol Choi, Yong-Kon Lim","doi":"10.1109/OCEANSAP.2006.4393847","DOIUrl":"https://doi.org/10.1109/OCEANSAP.2006.4393847","url":null,"abstract":"Beamforming for underwater acoustic communication (UAC) is affected by the broadband feature of UAC signal, which has relatively low center frequency compared with the signal bandwidth. The narrow-band assumption does not hold good in the UAC. (Unrealistic assumption) In this paper, we present computer simulation results of a broadband FIR beamformer for UAC using the baseband equivalent array signal model for phase-coherent UAC. We consider a vertical uniform linear array with 8 omni-directional elements and UAC system with carrier frequency 25 KHz and symbol rate 5 KHz. Pulse shaping filter (PSF) is the raised cosine filter with roll-off factor 0.25. Hence bandwidth to carrier frequency ratio is 0.25. The sensor spacing is half of the wavelength corresponds to carrier frequency. For simplicity, we assume that there is no signal fading and phase synchronization is perfect. We have considered two propagating paths: direct and surface reflected ones. The surface reflected path is regarded as interference signal. The signal to noise ratio (SNR) and signal to interference ratio (SIR) are fixed to 6 dB and OdB, respectively. The results show that the broadband FIR beamformer achieves optimum signal to interference and noise ratio (SINR) and outperforms the conventional narrowband beamformer by 0.5 dB of SINR when the inter-tap delay is a quarter of the symbol interval and the order of FIR filter is one. The broadband FIR beamformer performance is degraded when the FIR filter order is increased above the optimum value. The inter-tap delay should be small enough and it is related to the optimum FIR filter order.","PeriodicalId":268341,"journal":{"name":"OCEANS 2006 - Asia Pacific","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116502149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Prediction of Nutrient Fixation Effect of an Artificial Lagoon in Kobe Airport Island 神户机场岛人工泻湖的营养固定效果预测

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393908

K. Otsuka, N. Nakatani, T. Sawada

引用次数: 0

Health Assessment and Environmental Impacts of Modal Shift in Transportation 交通运输模式转换的健康评价与环境影响

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393837

Pingjian Liu, E. Kobayashi

{"title":"Health Assessment and Environmental Impacts of Modal Shift in Transportation","authors":"Pingjian Liu, E. Kobayashi","doi":"10.1109/OCEANSAP.2006.4393837","DOIUrl":"https://doi.org/10.1109/OCEANSAP.2006.4393837","url":null,"abstract":"Truck transport now accounts for more than half of goods distribution in Japan. However, truck transportation contributes to human health problems and climate change. A modal shift in transportation affects a wide range of factors, including the use of fossil fuel energy, globe-warming, and sea or land resources. The modal shift from truck transportation to sea transportation maybe one method for addressing these problems. The present paper proposes a method for evaluating the influence of the modal shift in transportation on health changes using the technique of health risk assessment. First, the level of airborne carcinogens from ship and truck exhaust was determined. Then, the density of each carcinogen in locations across Japan was calculated. Finally, the number of people in Japan who would suffer from cancer was derived, and the effects of the modal shift on health are evaluated based on the density calculation data and cancer risk. The current study also evaluates the modal shift from truck and car transportation to sea transportation for two representative routes in Japan using the ecological footprint method. Carbon dioxide (CO2) and other greenhouse gas emissions, and changes in forest cover before and after the modal shift are calculated to show an ecological footprint calculation related to the modal shift in transportation. Based on these assessments, this article confirms that: there is substantial potential for reducing the ecological footprint using the modal shift; and the exhaust emitted by ships poses less harm to people than truck exhaust.","PeriodicalId":268341,"journal":{"name":"OCEANS 2006 - Asia Pacific","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128022153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Synthesis and Coordination of the Motion of Multiple Flapping Foils for Control of a Biorobotic AUV 仿生水下航行器多扑翼运动的综合与协调控制

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393817

A. Menozzi, H. Leinhos

引用次数: 5

Design and Implementation of II/4 Shift D-QPSK Baseband Modem Using DSP Techniques 基于DSP技术的II/4 Shift D-QPSK基带调制解调器的设计与实现

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393970

R. Mohamad, N. M. Anas, K. Dimyati

引用次数: 2

Modeling and Simulation of the VideoRay Pro III Underwater Vehicle VideoRay Pro III水下航行器的建模与仿真

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393862

Wei Wang, C. Clark

引用次数: 54

Study of Focusing Structure in Time-Reversal-Mirror Technique 时间逆镜技术聚焦结构研究

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393922

Y. Chiu, Chi-Fang Chen, Ming-Hung Lin

引用次数: 0

An Area Localization Scheme for Underwater Sensor Networks 水下传感器网络的区域定位方法

OCEANS 2006 - Asia Pacific Pub Date : 2006-05-01 DOI: 10.1109/OCEANSAP.2006.4393969

V. Chandrasekhar, W. Seah

引用次数: 157