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Extraction of optimized parameters for Si_(0.6)Ge_(0.4)material and SPP mode propagation through Si_(0.6)Ge_(0.4)/Ag/Si_(0.6)Ge_(0.4)waveguide

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Optoelectronics Letters 2013年第6期9卷 454-457页

作者： md.Ghulam Saber Rakibul hasan Sagor Department of Electrical and Electronic Engineering Islamic University of Technology

The Lorentz model and modified Debye model(md.)parameters for Si0.6Ge0.4are presented.A nonlinear optimization algorithm is *** obtained parameters are used to determine the complex relative permittivity of Si0.6Ge0.4,and compared with the experimental data for *** the obtained parameters are used to analyze the properties of symmetric surface plasmon polariton(SPP)mode propagation in a dielectric-metal-dielectric(Dmd.material constructed with silver(Ag)and Si0.6Ge0.4for further verifying the extracted parameters.

关键词： SPP模式优化参数材料提取传播波导相对介电常数表面等离激元

Efficacy of Exercise-based Rehabilitation after Coronary Artery Bypass Graft and Stroke

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Efficacy of Exercise-based Rehabilitation after Coronary Art...

作者： md. MONERUZZAMAN 山东大学

学位级别：硕士

背景:现有大量报道指出基于运动的康复治疗(exercise-based rehabilitation,ER)对心血管和脑血管疾病的恢复有益。疾病特异性或个性化的康复计划是促进康复和减少患者痛苦的关键。研究发现,在冠状动脉旁路移植术(coronary arterybypassg... 详细信息

背景:现有大量报道指出基于运动的康复治疗(exercise-based rehabilitation,ER)对心血管和脑血管疾病的恢复有益。疾病特异性或个性化的康复计划是促进康复和减少患者痛苦的关键。研究发现,在冠状动脉旁路移植术(coronary arterybypassgraft,CABG)和脑卒中后进行个性化的运动康复治疗,能够有效提高患者的运动功能,改善躯体功能。但是确定心血管疾病康复计划方案所需的血流动力学参数,即心脏健康的重要前提的评价指标仍然不明确;此外,关于CABG的患者和中风患者的运动康复对患者整体生活质量(quality of life,QoL)和心脏健康的影响和改进方法还需要进一步的探讨。目的:本研究旨在通过系统性回顾及meta分析评定运动康复对CABG和脑卒中患者的心脏健康、运动功能和QoL的疗效,并进一步给出指南建议。方法:我们进行了两项系统综述。在第一项研究中,遵循无元分析的综合指南(Synthesis without meta-analysis,SWiM),我们检索了从 2000 年 1 月 1 日到 2022 年 9 月15日的四个在线数据库(EBSCOhost,Scopus,PubMed和Webof Science)中与CABG有关的数据,明确目前CABG的康复方案。在第二项研究中,我们检索了从2012年1月至2022年1月在Web of Science,PubMed Central和Scopus上发表的关于脑卒中后康复治疗的文章,并进行meta分析。我们在两项综述中都使用PICOS(population,intervention,comparison,outcome,and study design)方法进行数据检索。检索到的数据按照2020年系统综述和荟萃分析优先报告的条目(preferred reporting items for systematic reviews and meta-analyses,PRISMA)声明进行呈现。两项研究的系统综述方案均已在线注册和发布。结果:在第一项研究中,我们纳入了共包括599名CABG患者的9项基于运动的康复治疗的随机对照试验(randomized control trials,RCT)。患者出院后随访及入院过程中进行心脏康复(cardiac rehabilitation,CR),其中采用多联运动疗法(包括吸气肌训练、运动、上肢和下肢活动以及有氧运动)的患者,与使用单联运动疗法(呼吸训练)的患者相比,其在6分钟步行实验中,功能(6-minute walking distance,6MWD)取得了显著改善(中等质量的证据)。与单联运动疗法组患者相比,多联运动疗法组患者在出院时的最高摄氧量(volume of oxygen peak,VO2peak)无显著升高,但在随访期间VO2peak发现了显著的改善(证据质量中等)。另外,进行门诊康复治疗(包括高强度吸气肌训练、上下肢力量训练和有氧运动的患者,其出院时的6MWD和VO2peak也显著改善高质量证据)在使用不同健康相关的QoL问卷评估的多项运动组患者中,QOL的改善并不明显。第二项研究共纳入1 1项RCT。其中的康复治疗计划包括有氧运动、平衡训练、柔韧性训练、力量训练、上下肢伸展、游戏式运动,以及心血管疾病风险因素的咨询。其中4项RCT的分析结果表明,脑卒中后进行康复治疗的患者的6分钟步行实验中(six-minute walking test,6MWT)和 VO2peak 均数差(mean difference,md.为-57.61m 有显著改善;(95%置信区间[confidence interval,CI],-72.34m,-42.89m;Pmd.-2.30 mL/kg/min;95%CI,-3.51,-1.09;P=0.00)。然而,脑卒中患者康复治疗后血流动力学无明显改善,即血压的平均差(md.0.84mmHg;95%CI,-1.01,2.69;P=0.54),心率(md.1.64;95%Cl,-2.36,5.64;P=0.42)和心输出量(md.0.19;95%CI,-0.25,0.37;P=0.37)。结论:我们的研究表明,基于多联运动康复康复治疗(肢体锻炼、吸气肌训练、有氧和抗阻训练的组合),在合理的指导下,能够改善住院和门诊康复患者的运动功能。然而,多联运动康复疗法对CABG患者的健康相关的QoL没有明显的影响。在脑卒中患者中,运动康复后的血流动力学(心率、血压和心排出量)改善不显著,但运动功能,特别是6MWT和VO2peak显著提高。本研究提示我们,为了改善患者血流动力学和提高脑卒中后康复的效果,康复从业人员在对患者的康复计划中应该优先考虑心血管运动康复训练,足够的

关键词：运动康复心脏康复脑卒中 CABG 血流动力学

Comparison of microstructure and mechanical properties of titanium/ steel composite plates by two manufacturing processes

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Journal of Iron and Steel Research International 2018年第3期25卷 347-356页

作者： Xuan Yang Chang-gen Shi Yu-heng Ge md.Nahid hasan Sabuj Army Engineering University of PLA Nanjing 210007 Jiangsu China

Two types of titanium/steel composite plates with the same thickness were manufactured by parallel explosive welding and double vertical explosive welding and rolling, respectively. The comparative analysis of microstructure showed that the interface of double vertical explosive welding plate （B plate） tended to be straight while the interface of parallel explosive welding plate （A plate） was wavy bonding. Defects near the interface of B plate were extruded, and the thickness of the diffusion layer of B plate was thicker under the effects of preheating temperature and press-working. Comparative tests of mechanical properties indicated that the tensile shear strength of B plate was lower while its micro-hardness was higher. Specimens of these two types of plates were neither separated nor cracked after bending up to 180° in the three-point bending test. From the microstructural observation of tensile fracture characteristics, A plate had strong toughness fracture while B plate had mainly ductile fracture with cleavage fracture as the supplement. Macroscopically, the tensile strength of the latter was 7.9% less than that of the former. However, both satisfied the Chinese standard of tensile strength.

关键词： Double vertical explosive welding Hot rolling Parallel explosive welding Titanium/steel composite plate Microstructure Mechanical property

Precise Measurement of Moving Object by Moiré-Based Image Processing Technique

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Open Journal of Fluid Dynamics 2012年第4期2卷 202-207页

作者： md. Tawhidul Islam Khan Maeda Kazuhiko Kenbu Teramoto md. Mahbub hasan Department of Advanced Technology Fusion Saga University Saga Japan Faculty of Science and Engineering Saga University Saga Japan Graduate School of Science and Engineering Saga University Saga Japan

Moiré images that are generally termed as moiré fringes have been generated due to the interference of two repetitive gratings. These patterns can be applied to many uses in metrology such as the measurements of surface profilometry of aerofoil, stress-strain effects, thermal deformation and so on. Moreover, 3D surface reconstruction as well as movement characterization of linearly and rotary moving objects can be visualized and identified by the moiré imaging technique. Recently it is approached as an emerging tool in the fields of biotechnology-particularly in biomechanics, nanotechnology, broadband communication and optoelectronics as well. Conventional Moiré interferometry evaluates the interference of two light waves being reflected on a reference surface and the object to be profiled. However, satisfactions in the requirements for the current significant issues in obtaining accurate measurements regarding the information of the movements as well as the dimensional deformations of objects dealing with the online inspection in micro-level and nano-level are still challenging. Particularly, for the demand of the present real-time auto-inspection of different precise information of movements objects statistically and dynamically. In that case single light wave system makes the moiré sensing system easier and applicable in real-time imaging. Furthermore, avoiding the employment of expensive conventional imaging facilities in 3-D measurement in mechanical as well as bio-mechanical systems has become a critical problem to be tackled. Therefore, research has been conducted focusing on the objective of developing a simple but precise measuring tool based on a single wave moiré imaging technique for multidimensional motion sensing by employing simple image processing approaches. An experimental set-up with a small CMOS camera has been developed capable of measuring the motion of an object by using a simply ink-printed straight optical grating lines attached to the movin

关键词： Moiré Imaging Single Grating Method Precise Measurement

Identification of Low Nitrogen Stress Induced Genes and Expression Analysis of the Thioredoxin Protein Gene Family in Rice (Oryza Sativa L.)

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Identification of Low Nitrogen Stress Induced Genes and Expr...

作者： md. Nuruzzaman 华中农业大学

学位级别：硕士

Nitrogen has traditionally been considered one of the most important plant nutrients. In the plant system, this cycle is very complex and involved many enzymes. Increasing the efficiency of these enzymes is one of the better ways to increase the nitrogen use efficiency (NUE) of the plant system. For this purpose in the present study 12 candidate genes induced by low nitrogen stress were studied for their function in the nitrogen metabolism or related cycle in the plants by overexpressing and gene silencing and also checking the T-DNA insertion mutants of the candidate genes. Overexpressed, silenced transgenic plants and mutant lines were not showed any kind of visible phenotypic changes under normal and low nitrogen stress conditions in the hydroponic culture and field condition. Promoter analysis, GFP expression of the candidate genes were observed in the different tissues of plant life cycles.Thioredoxin (Trx) proteins play important biological functions in cells by changing redox via thioldisulfied exchange. This system is specifically widespread in plants. Through database search, 30 potential Trx protein-encoding genes (OsTrx) identified in rice (Oryza sativa L.). Analysis of the complete set of OsTrx proteins are presented here, including chromosomal location, conserved motifs, domain duplication, and phylogenetic relationship. Number of more introns in OsTrx5 suggested the origin of Trx gene.A comprehensive expression profile of Trx genes family was investigated by analyzing the signal data of this family extracted from the whole genome microarray analysis of Minghui63 and Zhenshan97, two indica parents, and the hybrid of these two parents Shanyou63, using 27 different tissues representing the entire life cycle of rice. Results revealed specific expression of some members at germination transition as well as 3-leaf stage during the vegetative growth phase of rice. OsTrx genes are also found to be differentially up- or down-regulated in rice seedlings sub

关键词： heading thioredoxin nitrate sterile germination seedling reductase transgenic Arabidopsis dehydrogenase

Evaluate the Strength of Denim Goods Using Different Washing Technique

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Journal of Materials Science and Chemical Engineering 2021年第3期9卷 1-8页

作者： Jakaria Ahamed md. Faysal Mahmud md. Faysal Ahammed Rony Mia md. Zahid hasan Tarequl hasan Khan Golam Qibria Limon Al Mojnun Shamim Department of Textile Engineering National Institute of Textile Engineering & Research (NITER) Savar Dhaka Bangladesh School of Textile Science & Engineering Wuhan Textile University Wuhan China College of Chemistry & Chemical Engineering Wuhan Textile University Wuhan China

Day by day, the demand and popularity of denim have increased. With the increase in demand for denim, washing has also increased. When we washed a piece of denim fabric, then its properties also changed. The properties are tensile strength, GSM, color fading, stiffness, abrasion resistance, moisture regain, etc. In this study, we conduct different washing processes on denim fabric such are Stonewash, Caustic wash, Acid wash, Normal wash, Pigment wash, Sandblasting, and Super whitewash. After washing, the properties of denim fabric have been analyzed especially strength. The tear and tensile strength were measured by ISO standard. From the above washing method, Normal & pigment wash showed good strength properties comparing with others.

关键词： Denim Fabric Washing Treatment Tear Strength Tensile Strength Normal Wash Pigment Wash

An Experimental Investigation of Different Washing Processes on Various Properties of Stretch Denim Fabric

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Journal of Materials Science and Chemical Engineering 2021年第1期9卷 1-15页

作者： md. Zayedul hasan A. K. M. Ayatullah Hosne Asif Abdur Razzaque md. Rakibul hasan Sudip Sur md. Omar Faruque Department of Textile Engineering Mawlana Bhashani Science and Technology University Santosh Tangail Bangladesh

This research work was designed to explore the effect of different washing processes (enzyme wash, enzyme stone wash, enzyme stone wash with bleaching, heavy enzyme stone wash with bleaching) on various properties of stretch denim fabric. Different properties like tensile strength, tear strength, dimensional stability to washing, color fastness to washing, color fastness to water, color fastness to perspiration, color fastness to light, color fastness to rubbing, changes in fabric weight were investigated in context with different washing processes for stretch denim fabric. All tests were carried out according to the ISO (International Organization for Standardization). Enzyme washed fabric illustrated better performance regarding tear strength, tensile strength and dimensional stability;but showed moderate performance in different color fastness properties. But the color fastness to rubbing of heavy enzyme stone wash was excellent. No significant change was observed regarding the grade of color change and color staining for color fastness to wash, color fastness to perspiration and color fastness to light with respect to different types of washing processes like enzyme wash, enzyme stone wash, enzyme stone wash with bleaching and heavy enzyme stone wash with bleaching. The grade for dry rubbing and wet rubbing was comparatively better for enzyme wash rather than other washing processes. The GSM (gram per square meter) of stretch denim fabric also increased accordingly after different kinds of washing process rather than untreated stretch denim fabric. The dimensional stability of stretch denim fabric also altered after going through different washing process. The highest shrinkage was occurred in weft direction for heavy enzyme stone wash with bleaching.

关键词： Enzyme Wash Stone Enzyme Wash Stretch Denim Bleaching Tensile Strength

Heart Disease Detection by Using Machine Learning Algorithms and a Real-Time Cardiovascular Health Monitoring System

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World Journal of Engineering and Technology 2018年第4期6卷 854-873页

作者： Shadman Nashif md. Rakib Raihan md. Rasedul Islam Mohammad hasan Imam Department of Computer Science & Engineering Rajshahi University of Engineering & Technology (RUET) Rajshahi Bangladesh Department of Electrical & Electronic Engineering American International University-Bangladesh (AIUB) Dhaka Bangla-desh

Cardiovascular diseases are the most common cause of death worldwide over the last few decades in the developed as well as underdeveloped and developing countries. Early detection of cardiac diseases and continuous supervision of clinicians can reduce the mortality rate. However, accurate detection of heart diseases in all cases and consultation of a patient for 24 hours by a doctor is not available since it requires more sapience, time and expertise. In this?study, a tentative design of a cloud-based heart disease prediction system had been proposed to detect impending heart disease using Machine learning techniques. For the accurate detection of the heart disease, an efficient machine learning technique should be used which had been derived from a distinctive analysis among several machine learning algorithms in a Java Based Open Access Data Mining Platform, WEKA. The proposed algorithm was validated using two widely used open-access database, where 10-fold cross-validation is applied in order to analyze the performance of heart disease detection. An accuracy level of 97.53% accuracy was found from the SVM algorithm along with sensitivity and specificity of 97.50% and 94.94%respectively. Moreover, to monitor the heart disease patient round-the-clock by his/her caretaker/doctor, a real-time patient monitoring system was developed and presented using Arduino, capable of sensing some real-time parameters such as body temperature, blood pressure, humidity, heartbeat. The developed system can transmit the recorded data to a central server which are updated every 10 seconds. As a result, the doctors can visualize the patient’s real-time sensor data by using the application and start live video streaming if instant medication is required. Another important feature of the proposed system was that as soon as any real-time parameter of the patient exceeds the threshold, the prescribed doctor is notified at once through GSM technology.

关键词： Data Mining Machine Learning IoT (Internet of Things) Patient Monitoring System Heart Disease Detection and Prediction

Evaluation of Combined Effect of Micronutrients (ZnSO₄ + Borax) and Fungicides to Control the Purple Blotch Complex of Onion (Allium cepa)

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American Journal of Plant Sciences 2016年第5期7卷 715-723页

作者： hasan Ali Hosna Ara Chowdhury Nisha md. Belal Hossain md. Rafiqul Islam Department of Plant Pathology Sher-e-Bangla Agricultural University Dhaka Bangladesh

Ten different treatments viz. T0 = Control, T1 = Micronutrients (ZnSO4 + Borax), T2 = Rovral 50 WP + Micronutrients, T3 = Dithane M-45 + Micronutrients, T4 = Ridomil Gold + Micronutrients, T5 = Cupravit + Micronutrients, T6 = Rovral 50 WP, T7 = Dithane M-45, T8 = Ridomil Gold and T9 = Cupravit were evaluated against the purple blotch complex disease of onion caused by Alternaria porri and Stemphylium vesicarium in field condition for bulb yield. In lab condition, all the tested chemical fungicides (Rovral 50 WP, Dithane M-45, Ridomil Gold MZ-72 and Cupravit 50 WP) significantly reduced mycelial growth of both pathogens. Among the fungicides, Rovral 50 WP @ 0.2% reduced the highest radial mycelial growth followed by Dithane M-45 @ 0.45% and Ridomil Gold MZ-72 @ 0.2% compared to control. In field experiment, application of Rovral 50 WP @ 0.2% along with micronutrients showed significant effect in reducing disease incidence and severity which significantly increased bulb yield and yield contributing characters.

关键词： Onion Purple Blotch Complex Micronutrients Fungicides