2010 4th International Conference on Bioinformatics and Biomedical Engineering最新文献_第6页

Spatial-Temporal Source Reconstruction of MEG via Variational EM Algorithm 基于变分EM算法的脑磁图时空源重构

2010 4th International Conference on Bioinformatics and Biomedical Engineering Pub Date : 2010-06-18 DOI: 10.1109/ICBBE.2010.5517755

J. Kan, Richard C. Wilson

{"title":"Spatial-Temporal Source Reconstruction of MEG via Variational EM Algorithm","authors":"J. Kan, Richard C. Wilson","doi":"10.1109/ICBBE.2010.5517755","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5517755","url":null,"abstract":"Magnetoencephalography(MEG) is a new noninvasive brain imaging technique reconstructed electronic activities of brain by measured the magnetic field surrounding scalp. The aim of this paper is to explore a new method of MEG source spatio-temporal reconstruction based on optimizing the reconstructed MEG source model. We make the assumption that the stimulated electronic activities of the brain are located on a particular part of cortex where we partition it with multiple even voxels. In terms of Biot-Savart Law of electromagnetism, the spatial source model is built with multiple unknown parameters which reflect the information of the source location. Then, we try to solve this parameters optimization as a Maximum-likelihood estimation (MLE) using variational EM algorithm. According to the application of this approach, this paper also addresses that the solution of MEG signal reconstruction should be considered to avoid overlapping the calculation complexity, which may result in too expensive calculation to practice. Whereas, this approach also provides a new possibility and the new angle to solve MEG source reconstruction.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"69 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79754043","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: 0

Segmentation of White Matter Based on Region Growing and Threshold Theory 基于区域生长和阈值理论的脑白质分割

2010 4th International Conference on Bioinformatics and Biomedical Engineering Pub Date : 2010-06-18 DOI: 10.1109/ICBBE.2010.5516524

Min Li, Hongyan Luo, Renbin He, Wenwu Zhu, L. Tan, Yi Wu

引用次数: 1

Textural Feature Analysis for Ultrasound Breast Tumor Images 乳腺超声肿瘤图像的纹理特征分析

2010 4th International Conference on Bioinformatics and Biomedical Engineering Pub Date : 2010-06-18 DOI: 10.1109/ICBBE.2010.5516918

Qiuxia Chen, Qi Liu

引用次数: 6

NOR1 Enhanced CB1954 Induced Cell Cytotoxicity in HepG2 Is Dependent on Grb2 Mediated MAPK Pathway NOR1增强CB1954诱导的HepG2细胞毒性依赖于Grb2介导的MAPK通路

2010 4th International Conference on Bioinformatics and Biomedical Engineering Pub Date : 2010-06-18 DOI: 10.1109/ICBBE.2010.5516376

R. Gui, Jing Liu, Deng-qing Li, Hua Tang, Zhenqian Feng, X. Nie

{"title":"NOR1 Enhanced CB1954 Induced Cell Cytotoxicity in HepG2 Is Dependent on Grb2 Mediated MAPK Pathway","authors":"R. Gui, Jing Liu, Deng-qing Li, Hua Tang, Zhenqian Feng, X. Nie","doi":"10.1109/ICBBE.2010.5516376","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5516376","url":null,"abstract":"Nitroreductase gene NOR1 is possibly involved in the chemical carcinogenesis of hepatic cancer and nasopharyngeal carcinoma. We have demonstrted that NOR1 overexpression could convert monofunction alalkylating agent, CB1954 ([5-aziridin-1-yl]-2,4-dinitrobenzamide) into a toxic form by reduction of the 4-nitro group of CB1954 and enhancing cell killing in nasopharyngeal carcinoma(NPC) cell line CNE1. However, the mechanisms are not known.Using cDNA microarrys and quantitative Real-time PCR, we previously found that NOR1 increased the expression of Grb2 mRNA by 4.8 fold in hepatic cancer cell HepG2. In the present study, we found that NOR1 increased the Grb2 protein expression by 3 fold and enhanced the CB1954 induced cell killing in HepG2 cells ,and the cell cytotoxicity could be inhibited by adding tyrosine kinase inhibitor genestein or by stable transfection of Grb2 shRNA (pU6+27-shGrb2) to silence the expression of Grb2. Western blot analysis showed that Grb2 downexpression could reduce the activity of MAPK. Moreover, inhibiting the activatiton of MAPK by MEK inhibtor PD98059 suppressed CB1954 induced cell killing. These results suggested that NOR1 gene enhanced CB1954 cell cytotoxicity through upregulating expression of Grb2 and activiation of MAPK signal transduction in HepG2 cells.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"9 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80513429","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: 1

Preparation of a Composite Plate Using Nonmetallic Materials Powder from the Waste Printed Circuit Boards 利用废旧印刷电路板中的非金属材料粉末制备复合板

2010 4th International Conference on Bioinformatics and Biomedical Engineering Pub Date : 2010-06-18 DOI: 10.1109/ICBBE.2010.5516729

Yin Jin, Guangming Li, Wenzhi He

{"title":"Preparation of a Composite Plate Using Nonmetallic Materials Powder from the Waste Printed Circuit Boards","authors":"Yin Jin, Guangming Li, Wenzhi He","doi":"10.1109/ICBBE.2010.5516729","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5516729","url":null,"abstract":"With the production of electrical and electronic equipment (EEE) being one of the fastest growing markets in the world, the steep increasing amount of waste electrical and electronic equipment (WEEE) has triggered off a serious environmental crisis. A composite plate produced by using nonmetallic materials of pulverized waste printed circuit boards(PCBs) obtained after air classification as filler was prepared. The main mechanical properties of composite plate such as tensile strength, bending and impact strength were compared according to different filler particle size, dosage, and modifier and the inner structure of the composite plate was investigated by fractography study. The results indicated that using polypropylene S700 as the base resin and maleic anhydride grafted polypropylene (MAH-g-PP) as a modifier, the mechanical properties of composite plate were excellent when non-metallic materials with particle size from 0.125 to 0.3mm adding amount was 20 wt%. This technique of recycling waste PCBs offers a new way for the improvement of recovery and treatment system of WEEE and possesses wide application prospects.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"92 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79014282","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: 3

On the Integration of Different Physiological Model Systems 论不同生理模型系统的整合

2010 4th International Conference on Bioinformatics and Biomedical Engineering Pub Date : 2010-06-18 DOI: 10.1109/ICBBE.2010.5516509

J. Kretschmer, A. Wahl, K. Moller

引用次数: 1

Acute Toxicity Test of Landfill Leachates Using Protozoan Communities 利用原生动物群落进行垃圾渗滤液急性毒性试验

2010 4th International Conference on Bioinformatics and Biomedical Engineering Pub Date : 2010-06-18 DOI: 10.1109/ICBBE.2010.5515286

Ting Liu, Zhulei Chen, Qianwen Fu, B. Shi, Lie Yang

{"title":"Acute Toxicity Test of Landfill Leachates Using Protozoan Communities","authors":"Ting Liu, Zhulei Chen, Qianwen Fu, B. Shi, Lie Yang","doi":"10.1109/ICBBE.2010.5515286","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5515286","url":null,"abstract":"Leachate contains high concentrations of organic matter, ammonia, metals, and other toxic compounds, which may pose serious risks to ecosystems and human health. In order to set up the appropriate toxicological criteria for the leachate, leachate toxicity tests with various organisms need to be conducted. The objective of this investigation was to evaluate the toxicity of leachate using the protozoan community, and the toxic effects of varies seasonal leachates were also compared. Leachates from two municipal solid waste landfills in Wuhan, China were used to develop short-term acute toxicity testing. Bioassays were conducted recording toxicity against various seasonal protozoan communities as median effective concentrations (EC50 values) of species after 24 h exposure. Various seasonal protozoan communities were all sensitive to the leachate samples and the species of the communities decreased with an increase in the leachates concentrations. The EC50 values of Landfill A oscillated between 1.03% and 2.24%, and the EC50 values of Landfill B were between 2.79% and 6.60%. Fluctuation of physicochemical parameters and EC50s of leachates depended rather on landfill age than season of the year (seasonal variations). The results from the bivariate correlation analyses between EC50s and physicochemical parameters implied that the toxicity of leachate might reliably depend on the chemical oxygen demand (COD) and ammonia nitrogen (NH4+-N).","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"45 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79048808","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: 1

Pollutants Removal from Municipal Wastewater Using Vertical Multilevel Soil Infiltration System 垂直多层土壤渗透系统去除城市污水中的污染物

2010 4th International Conference on Bioinformatics and Biomedical Engineering Pub Date : 2010-06-18 DOI: 10.1109/ICBBE.2010.5517425

Shengjiong Yang, Chuanping Feng, L. Hou, Chun-bo Hao

引用次数: 0

Agricultural Burning Detection Using Remote Sensing: A Case Study in Zhejiang Province, China 基于遥感技术的农业燃烧探测——以浙江省为例

2010 4th International Conference on Bioinformatics and Biomedical Engineering Pub Date : 2010-06-18 DOI: 10.1109/ICBBE.2010.5516543

Zili Zhang, H. Yu, Zunying Hu, Bin Zhou, Mingchun Han

{"title":"Agricultural Burning Detection Using Remote Sensing: A Case Study in Zhejiang Province, China","authors":"Zili Zhang, H. Yu, Zunying Hu, Bin Zhou, Mingchun Han","doi":"10.1109/ICBBE.2010.5516543","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5516543","url":null,"abstract":"Random agricultural burning such as crop straw fire, especial during the harvest seasons of summer and autumn, is a very common phenomenon in rural or suburban cities in China. However, several pollutions may caused by this kind of biomass burning including climate-destructive aerosols and carbon fluxes which decrease seriously regional air quality and may have an negative impact on public human health leading to respiratory illness. Using remote sensing is an available method to detect and monitor agricultural burning arbitrarily with its better time and spatial effectiveness. As a part of EOS mission, MODIS was suitable for fire detection as some high-temperature-sensitive bands of the sensor had been improved. A hybrid algorithm presented by the paper had archived two major advancements on adjusting the potential thresholds to suit lower temperature of crop straw burning than forest fires and introducing latest land cover data to exclude fake agriculture burning fire points which not located in croplands. The results had been validated by FIRMS's active fire production suggesting that the modified algorithm works well for agriculture burning under complex land characteristic of eastern China, especially in Zhejiang province. A very large potential for satellite data as an efficient method to detect agriculture burning was also demonstrated in the study.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"38 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81566441","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: 1

Disinfection for Removal of Zooplankton with Chlorine Dioxide 二氧化氯消毒去除浮游动物

2010 4th International Conference on Bioinformatics and Biomedical Engineering Pub Date : 2010-06-18 DOI: 10.1109/ICBBE.2010.5516154

Tao Lin, S. Fan, Wei Chen

引用次数: 1