检索结果-南通市图书馆

CAutoCSD-Evolutionary Search and Optimisation Enabled Computer Automated Control System Design

International Journal of Automation and computing 2004年第1期1卷 76-88页

作者： kiam heong ang Gregory C.Y. Kay Chen Tan Hiroshi Kashiwagi Department of Electronics and Electrical Engineering University of Glasgow Glasgow G12 8LT UKDepartment of Electronics and Electrical Engineering University of Glasgow Glasgow G12 8LT UKDepartment of Electronics and Electrical Engineering University of Glasgow Glasgow G12 8LT UKDepartment of Mechanical Engineering and Material Science Kumamoto University Japan

This paper attempts to set a unified scene for various linear time-invariant (LTI) control system design schemes, by transforming the existing concept of “computer-aided control system design” (CACSD) to novel “computer-automated control system design” (CAutoCSD). The first step towards this goal is to accommodate, under practical constraints, various design objectives that are desirable in both time and frequency domains. Such performance-prioritised unification is aimed at relieving practising engineers from having to select a particular control scheme and from sacrificing certain performance goals resulting from pre-commitment to such schemes. With recent progress in evolutionary computing based extra-numeric, multi-criterion search and optimisation techniques, such unification of LTI control schemes becomes feasible, analytical and practical, and the resultant designs can be creative. The techniques developed are applied to, and illustrated by, three design problems. The unified approach automatically provides an integrator for zero-steady state error in velocity control of a DC motor, and meets multiple objectives in the design of an LTI controller for a non-minimum phase plant and offers a high-performance LTI controller network for a non-linear chemical process.

关键词： Linear time invariant (LTI) proportional plus integral plus derivative (PID) control system design (CSD) computer aided control system design (CACSD) performance index genetic algorithms (GA) evolutionary computation (EC) process control r

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The coronary computed tomography angiogram: from the basics to advanced interpretation

引用

Journal of Geriatric Cardiology 2006年第1期3卷 35-44页

作者： Tiong kiam ONG Stephan Achenbach Department of Cardiology Jalan Tun Ahmad Zaidi Adruce Kuching Sarawak 93586 Malaysia Department of Internal Medicine Ⅱ (Cardiology) University of Erlangen Nuremberg Germang

　　Introduction　　According to the WHO's World Health Report 2003, 1cardiovascular disease was responsible for 16.7 million deaths annually. As a result, it is now the leading cause of death in developed countries and in many developing countries. Detecting and preventing the progression of coronary artery disease is the target of many pharmaceutical, technological and other scientific programs today. Presently, the main diagnostic tool for evaluating coronary arteries is thc conventional coronary angiogram (CCA).……

关键词： MPR from the basics to advanced interpretation The coronary computed tomography angiogram CTA MDCT oral MIP

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Image-Based Automatic Diagnostic System for Tomato Plants Using Deep Learning

引用

Computers, Materials & Continua 2021年第4期67卷 595-612页

作者： Shaheen Khatoon Md Maruf Hasan Amna Asif Majed Alshmari Yun-kiam Yap College of Computer Science and Information Technology King Faisal UniversityAl-Ahsa31982Saudi Arabia College of Science King Faisal UniversityAl-Ahsa31982Saudi Arabia

Tomato production is affected by various threats,including pests,pathogens,and nutritional deciencies during its growth *** control is not timely,these threats affect the plant-growth,fruit-yield,or even loss of the entire crop,which is a key danger to farmers’livelihood and food *** plant disease diagnosis methods heavily rely on plant pathologists that incur high processing time and huge *** and cost-effective methods are essential for timely detection and early intervention of basic food threats to ensure food security and reduce substantial economic *** developments in Articial Intelligence(AI)and computer vision allow researchers to develop image-based automatic diagnostic tools to quickly and accurately detect *** this work,we proposed an AI-based approach to detect diseases in tomato *** goal is to develop an end-to-end system to diagnose essential crop problems in real-time,ensuring high *** paper employs various deep learning models to recognize and predict different diseases caused by pathogens,pests,and nutritional *** Convolutional Neural Networks(CNNs)are trained on a large dataset of leaves and fruits images of tomato *** compared the performance of ShallowNet(a shallow network trained from scratch)and the state-of-theart deep learning network(models are ne-tuned via transfer learning).In our experiments,DenseNet consistently achieved high performance with an accuracy score of 95.31%on the test *** results verify that deep learning models with the least number of parameters,reasonable complexity,and appropriate depth achieve the best *** experiments are implemented in Python,utilizing the Keras deep learning library backend with TensorFlow.

关键词： Tomato plant disease classication and prediction deep learning convolutional neural network RestNet VGGNet DenseNet

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Assessment of left ventricular ejection fraction: comparison of two dimensional echocardiography, cardiac magnetic resonance imaging and 64-row multi-detector computed tomography

引用

Journal of Geriatric Cardiology 2006年第1期3卷 2-8页

作者： Chee Khoon LIEW Rapaee ANNUAR Tiong kiam ONG Sze Piaw CHIN Tobias Seyfarth Yean Yip FONG Choon Kiat ang Houng Bang LIEW Kui Hian SIM Department of Cardiology Sarawak General Hospital Sarawak Malaysia University Malaysia Sarawak Siemens Cardiac Solutions Erlangen Germany Department of Cardiology Sarawak General Hospital SarawakMalaysia

Objectives To compare left ventricular ejection fraction (LVEF) determined from 64-row multi-detector computed tomography (64-row MDCT) with those determined from two dimensional echocardiography (2D echo) and cardiac magnetic resonance imaging (CMR). Methods Thirty-two patients with coronary artery disease underwent trans-thoracic 2D echo, CMR and contrast-enhanced 64-row MDCT for assessment of LVEF within 48 hours of each other. 64-row MDCT LVEF was derived using the Syngo Circulation software; CMR LVEF was by Area Length Ejection Fraction (ALEF) and Simpson method and 2D echo LVEF by Simpson *** The LVEF was 49.13 ± 15.91% by 2D echo, 50.72 ± 16.55% (ALEF method) and 47.65 ± 16.58%(Simpson method) by CMR and 50.00 ± 15.93% by 64-row MDCT. LVEF measurements by 64-row MDCT correlated well with LVEF measured with CMR using either the ALEF method (Pearson correlation r = 0.94, P ＜0.01) or Simpson method (r = 0.92, P＜0.01). It also correlated well with LVEF measured using 2D echo (r = 0.80, P ＜ 0.01). Conclusion LVEF measurements by 64-row MDCT correlated well with LVEF measured by CMR and 2D echo. The correlation between 64-row MDCT and CMR was better than the correlation between 2D echo with CMR. Standard data set from a 64-row MDCT coronary study can be reliably used to calculate the LVEF.

关键词： ejection fraction echocardiography magnetic resonance imaging computed tomography

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Feasibility and accuracy of coronary imaging in elderly patients using the 64-row multi-detector computed tomography: a correlation study with conventional coronary angiography

引用

Journal of Geriatric Cardiology 2006年第1期3卷 9-14页

作者： Chee Khoon LIEW Sze Piaw CHIN Tiong kiam ONG Seyfarth Tobias Yean Yip FONG Choon Kiat ang Houng Bang LIEW Rapaee ANNUAR Kui Hian SIM Deptartment of Cardiology Sarawak General Hospital SarawakMalaysia Siemens Cardiac Solutions Erlangen Germany Universitv Malaysia Sarawak Malaysia

Background Elderly patients generally have higher occurrence of coronary calcification, increased heart rate and difficulty with prolonged breath-holding. The aim of our study was to investigate the feasibility and accuracy of using 64-row multi-detector computed tomography (MDCT) in the assessment of coronary artery stenoses in elderly patients. Methods One hundred and fifty two patients with suspected or known coronary artery disease were divided into 4 groups according to their age (Group A: 40-49 years,n=34; Group B: 50-59 years, n=57; Group C: 60-69 years, n=48; Group D: 70 years and above; n=13). Coronary CT angiography (CTA) using a 64-row MDCT was performed and the findings were compared with that of conventional coronary angiography (CCA).Using axial images, multi-planar reconstructions (MPR) and maximum intensity projections (MIP), coronary segments of lumen diameter = 1.5mm were analyzed for the presence of significant stenosis (= 50% ). Results Percentages of poor image quality from coronary CTA preventing reliable correlations with CCA were 21%, 14%, 19% and 62% in Groups A to D respectively. Patients in Group D had significantly higher calcium scores compared with the other groups (P＜0.001). In patients where CTA images were of acceptable quality, percentages of accurate correlations with CCA were 89.8%, 93.4%, 86.6% and 78.0% for Groups A to D *** were no significant difference in serum creatinine, heart rate and contrast volume between the 4 groups. Conclusions The 64-row MDCT coronary angiography was less accurate and feasible for patients aged 70 years or above due to heavy coronary calcification and inability to perform a satisfactory breath-hold. However, a high diagnostic accuracy with the MDCT is possible in patients aged less than 70 years.

关键词： computed tomography angiography coronary artery disease elderly

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High-resolution computed tomography in patients with atypical 'cardiac' chest pain: a study investigating patients at 10-year cardiovascular risks defined by the Framingham and PROCAM scores

引用

Journal of Geriatric Cardiology 2006年第1期3卷 17-21页

作者： Choon Kiat ang Alan Yean Yip FONG Sze Piaw CHIN Tiong kiam ONG Seyfarth M Tobias Chee Khoon LIEW Rapaee ANNUAR Houng Bang LIEW Kui Hian SIM Deptartment of Cardiology Sarawak General Hospital Sarawak Malaysia Siemens Medical Solutions Germany Deptartment of Cardiology Sarawak General Hospital SarawakMalaysia University Malaysia Sarawak Malaysia

Background and objective Atypical 'cardiac' chest pain (ACCP) is not usually caused by myocardial ischaemia. Current noninvasive investigations for these symptoms are not yet as accurate as invasive coronary angiography. The latest 64-row multi-detector computed tomography (MDCT) technology is non-invasive, has high specificity and negative predictive values for the detection of significant coronary disease. Our aim was to investigate if this modality can provide more information in the assessment of outpatients with ACCP in addition to established cardiovascular risk scores. Methods Seventy consecutive patients presenting to the outpatient clinic with ACCP underwent 64-row MDCT scan of the coronary arteries. They were categorized into low, medium or high risk groups based upon the Framingham and PROCAM scores. We defined a clinically abnormal MDCT scan as coronary stenosis =50% or calcium score ＞400 Agatston. Results Fifty-three (75.7%) patients did not have clinically abnormal scans. Framingham score classified 43 patients as low-risk while PROCAM classified 59 patients as low-risk. MDCT scans were abnormal for 18.6% and 22.0% of the respective low-risk group of patients. For patients with medium-to-high risk, 33.3% and 36.4% of Framingham and PROCAM patient groups respectively had abnormal MDCT scans. Conclusion MDCT adds valuable information in the assessment of patients with ACCP by identifying a significant proportion of patients categorized as low-risk to have underlying significant coronary stenosis and coronary calcification by established cardiovascular risk scores.

关键词： multi-detector computed tomography atypical 'cardiac' chest pain coronary artery disease risk stratification

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Efficient transcription of the larvicidal cry4Bagene from Bacillus thuringiensisin transgenic chloroplasts of the green algal Chlamydomonas reinhardtii

引用

Advances in Bioscience and Biotechnology 2012年第4期3卷 362-369页

作者： Thanate Juntadech Kittisak Yokthongwattana Sithichoke Tangphatsornruang Yun-kiam Yap Gerd Katzenmeier Chanan angsuthanasombat Department of Biochemistry and Center for Excellence in Protein Structure and Function Faculty of Science Mahidol University Bangkok Thailand DivisionInstitute of Molecular Biosciences Mahidol University Salaya Campus Nakornpathom Thailand National Center for Genetic Engineering and Biotechnology Thailand Science Park Pathumthani Thailand

Unicellular micro-alga Chlamydomonas reinhardtii has been recognized as a promising host for expressing recombinant proteins albeit its limited utility due to low levels of heterologous protein expression. Here, transcription of the 3.4-kb mosquito-larvicidal cry4Ba gene from Bacillus thuringiensis in transgenic C. reinhardtii chloroplasts under control of the promoter and 5’-untranslated region of photosynthetic psbA gene was accomplished. Inverted repeats in chloroplast genomes of the host strain with deleted endogenous psbA genes were selected as recombination targets. Two transformant lines were obtained by dual-phenotypic screening via exhibition of resistance to spectinomycin and restoration of photosynthetic activity. Stable and site-specific integration of intact cry4Ba and psbA genes into chloroplast genomes found in both transgenic lines implied homoplasmy of organelle populations. Achievement in cotranscription of cry4Ba and psbA transgenes revealed by RT-PCR and Northern blot analyses demonstrates the sufficiency of this system’s transcription machinery, offering the further innovation for insecticidal protein production.

关键词： Chlamydomonas reinhardtii Chloroplast Transformation Inverted Repeats Bt-cry4Ba Transcript psbA Promoter

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

64-row multi-dector computed tomography coronary image from a center with early experience: first illustration of learning curve

引用

Journal of Geriatric Cardiology 2006年第1期3卷 29-34页

作者： Sze Piaw CHIN Tiong kiam ONG Chee Khoon LIEW M.Tobias Seyfarth Fong Yean Yip ALAN Houng Bang LIEW Kui Hian SIM Dept of Cardiology Sarawak General Hospital Siemens Cardiac Solutions Erlangen Germany

Background and objectives The recent joint ACCF/AHA clinical competence statement on cardiac imaging with multi-detector computed tomography recommended a minimum of 6 months training and 300 contrast examinations, of which the candidate must be directly involved in at least 100 studies. Whether this is adequate to become proficient in interpretation of coronary computed tomogsignificant coronary stenosis in a center with 1 year's experience using a 64-row scanner. Methods A total of 778 patients underwent contrast-enhanced CTA between January and December 2005. Out of these patients, 301 patients also underwent contrast-enhanced conventional coronary angiography (CCA). These patients were divided into 4 groups according to the time the examination was underwent. Group Q1: first quarter of the year (n=20), Group Q2: second quarter (n=128), Group Q3: third quarter (n=134), and Group Results The sensitivity, specificity, positive, and negative predictive values were Q1 - 64%, 89%, 49% and 94%, respectively; Q2 -79%, 96%, 74% and 97%, respectively; Q3 - 78%, 96%, 74%, 97%, respectively, and Q4 - 100% for all. Conclusions In a center with formal training and high caseload, our accuracy in CTA analysis reached a plateau after 6 months experience. Test-bolus protocols produce better image quality and can improve accuracy. New centers embarking on CTA will need to overcome an initial 6-month learning curve depending upon the caseload during which time they should consider correlation with CCA.

关键词： computed tomography training angiography coronary artery disease

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

不同D/t比例对空心铝管材料能量吸收和塑性破坏性能的影响

引用

有色金属工程 2019年第7期9卷 21-26页

作者：胡涞 YEO kiam Beng 吴怀超丁宁陈华徐雨贵州大学现代制造技术教育部重点实验室贵阳550025 The Advanced Composites & Materials Faculty of Engineering University Malaysia Sabah Malaysy 贵州大学机械工程学院贵阳550025 重庆机电职业技术学院电气与电子工程学院重庆402760

为研究设备中使用的铝管材料能量吸收和塑性破坏性能,以滑靴副摩擦磨损试验机中空铝管材料6061-T4为载体,研究铝管在三点准静态横向载荷的作用下的塑性破坏程度和能量吸收大小。以三点准静态下不同跨度尺寸为研究试点,提出了两种试验理... 详细信息

为研究设备中使用的铝管材料能量吸收和塑性破坏性能,以滑靴副摩擦磨损试验机中空铝管材料6061-T4为载体,研究铝管在三点准静态横向载荷的作用下的塑性破坏程度和能量吸收大小。以三点准静态下不同跨度尺寸为研究试点,提出了两种试验理论并运用铝管拉伸试验机ISTRON-8801进行试验分析。结果表明,经过横向标准三点处弯曲加载的圆形铝管结构经历了三个塑性变形阶段:起皱阶段、起皱与弯曲阶段、结构崩溃阶段。在恒定跨度长度中,铝管随着不同直径/厚度( D/t )比例(12.48、22.54、27.50和36.32)的增加,所吸收的应变能量也会增加;管子承受的最大载荷也随着 D/t 比例的增加而增加。同时,管子在皱缩阶段吸收能量大小会受D/t比例的变化影响。

关键词：铝管能量吸收塑性破坏准静态 D/t

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

纤维改性酶在生活用纸生产中的应用

引用

国际造纸 2009年第4期28卷 1-6页

作者：包建兵曾健鸿巴克曼实验室化工(上海)有限公司

随着生活用纸行业的快速发展,市场竞争对于成纸品质和生产成本提出了更高的要求,而纤维改性酶在生活用纸中的实际应用表明:它不但能提高成纸的综合品质,还能进一步降低总的生产成本。纤维改性酶是环境友好型产品,应用安全方便。文中详... 详细信息

随着生活用纸行业的快速发展,市场竞争对于成纸品质和生产成本提出了更高的要求,而纤维改性酶在生活用纸中的实际应用表明:它不但能提高成纸的综合品质,还能进一步降低总的生产成本。纤维改性酶是环境友好型产品,应用安全方便。文中详细列举了巴克曼纤维改性酶在中国不同纸机上的实际应用案例。

关键词：生活用纸行业纤维改性应用安全生产成本酶综合品质环境友好型市场竞争

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：