检索结果-南通市图书馆

Pilot Plant to Conduct Various Advanced Temperature Control Strategies for a Partially Simulated Chemical Reactor System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pilot Plant to Conduct Various Advanced Temperature Control ...

Electromagnetic Time Reversal Algorithms and Source Localization in Lossy Dielectric Media

The 12th Asian Pacific Confederation of Chemical Engineering Congress

作者： ahmad khairi abdul wahab Mohamed Azlan Hussain Rosli Omar Deparment of Chemical Enginccring Faculty of EngineeringUnivcrsiti Malaya50603 Kuala LumpurMALAYSIA Department of Chemical Engineering Faculty of EngineeringUniversid Malaya50603 Kuala LumpurMALAYSIA Department of Electrical Engineering Faculty of EngineeringUniversiti Malaya50603 Kuala LumpurMALAYSIA

There are many industrial usages of chemical reactors which produce useful *** are highly non-linearity behavior,hence good and accurate controls have become a major factor in determining the aspects of process safety,quality and *** this reason,a practical par- tially simulated(PARS-EX)reactor pilot plant has been designed to conduct such online control

关键词： online implementation partially simulated advanced control chemical reactor

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2014年第12期61卷 779-789页

作者： abdul wahab Amer Rasheed Tasawar Hayat Rab Nawaz Department of Mathematics COMSATS Institute of Information Technology Department of Mathematics Quaid-i-Azam University Nonlinear Analysis and Applied Mathematics (NAAM) Research Group Faculty of Science King Abdulaziz University

The problem of reconstructing the spatial support of an extended radiating electric current source density in a lossy dielectric medium from transient boundary measurements of the electric fields is studied. A time reversal algorithm is proposed to localize a source density from loss-less wave-field measurements. Further, in order to recover source densities in a lossy medium, we first build attenuation operators thereby relating loss-less waves with lossy ones. Then based on asymptotic expansions of attenuation operators with respect to attenuation parameter, we propose two time reversal strategies for localization. The losses in electromagnetic wave propagation are incorporated using the Debye's complex permittivity, which is well-adopted for low frequencies(radio and microwave) associated with polarization in dielectrics.

关键词： time reversal electromagnetic waves inverse source problem Debye’s law attenuation operators

Application of automated image analysis to the identification and extraction of recyclable plastic bottles

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

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第6期10卷 794-799页

作者： Edgar SCAVINO Dzuraidah abdul wahab Aini HUSSAIN Hassan BASRI Mohd Marzuki MUSTAFA Faculty of Engineering Universiti Kebangsaan Malaysia

An experimental machine vision apparatus was used to identify and extract recyclable plastic bottles out of a conveyor belt. Color images were taken with a commercially available Webcam, and the recognition was performed by our homemade software, based on the shape and dimensions of object images. The software was able to manage multiple bottles in a single image and was additionally extended to cases involving touching bottles. The identification was fulfilled by comparing the set of measured features with an existing database and meanwhile integrating various recognition techniques such as minimum distance in the feature space, self-organized maps, and neural networks. The recognition system was tested on a set of 50 different bottles and provided so far an accuracy of about 97% on bottle identification. The extraction of the bottles was performed by means of a pneumatic arm, which was activated according to the plastic type; polyethylene-terephthalate (PET) bottles were left on the conveyor belt, while non-PET bottles were extracted. The software was designed to provide the best compromise between reli-ability and speed for real-time applications in view of the commercialization of the system at existing recycling plants.

关键词： Computer vision Pattern recognition Automated sorting Recycling

Calcification Response of Coccolithophores to Eutrophication

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

Calcification Response of Coccolithophores to Eutrophication

作者： wahab abdul 西南科技大学

学位级别：硕士

颗石藻细胞是单细胞光合海藻类,珊瑚藻类主要是海洋单细胞浮游植物。颗石藻虫物种海洋球石藻是现代海洋中分布最广泛的物种。因为它们可以通过光合作用消化碳和碳酸钙(球石),所以它们的物种遍布全世界。它们是世界上最大的碳群,也是最... 详细信息

颗石藻细胞是单细胞光合海藻类,珊瑚藻类主要是海洋单细胞浮游植物。颗石藻虫物种海洋球石藻是现代海洋中分布最广泛的物种。因为它们可以通过光合作用消化碳和碳酸钙(球石),所以它们的物种遍布全世界。它们是世界上最大的碳群,也是最大的主要生产者之一。随着人口的增加,人类越来越依赖海洋作为食物来源和生活。因此,我们的文明越来越容易受到海洋系统的负面影响。关于碳和氮在细胞水平上相互作用的信息缺乏与生态相关的浮游植物物种,我们研究了硝酸根的有效性对广泛分布的海洋球石藻有害藻华的碳和氮含量的影响。这些自然现象,对捕鱼生产,公共卫生和现代工业产生了显着的负面影响。细胞在足够的(～280uM)和环境(～10uM)硝酸根离子中培养。后者代表了典型的地表水硝酸盐浓度。在过去的几十年里,硝酸铒的全球频率,规模和地理范围都有所增加。有人提出,全球变化和富营养化是主要趋势。因此,本文的第一部分重点关注海洋球石藻可能形成的环境条件。使用分批培养技术,提高温度和营养素负荷(磷酸盐和硝酸盐)。海洋球石藻(PMLB92/11)也在氮气下分批培养。作为磷钙化石的限制,多元化广泛分布着一批海洋微藻,生物生产。由球孢霉产生植物海洋球石藻产生的细胞内钙化受各种环境因素调节。方解石在细胞表面的球石形式。批次孵化使用海洋球石藻。我们探索了这种钙化过程的反应,通过改变初始培养基正常浓度为1ppm(百万分率)的生长速率和颗粒有机磷的氮和磷生产。尽管总有机氮限制下颗粒有机氮产量下降了 96%,但颗粒有机磷产量下降了85%。在磷限制下,氮的增长率下降31%,磷的限制率增加26%。无机碳元素,有机碳元素,有机氮元素,颗粒无机碳产量在氮极限下增加1.5倍,在磷极限下增加3.3倍,并产生颗粒状有机磷和石蜡形态分析。在氮极限下颗粒无机碳的产量增加了 1.2倍,并且在P极限下没有变化,结论是氮限制下颗粒无机氮产量的减少和磷限制下颗粒无机磷产量的减少代表了细胞的生理反应,颗粒碳生产代表了一种方法学的人为因素。此外,紫外-可见光谱和傅里叶红外光谱分析显示,氮磷施肥增强的石英石钙化的时间依赖性伴随着方解石向文石非晶相的晶相转变。结果表明,石灰石的形成不受磷或氮限制的影响,其钙化率可能会受到影响。后一个结论显然与我们的数据相矛盾。我们讨论这个推理的原因。

关键词：钙化颗石藻氮磷浓度海洋球石藻批量培养有机和无机碳生产

Self-management of osteoarthritis while waiting for total knee arthroplasty during the COVID-19 pandemic among older Malaysians

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第29期11卷 7043-7052页

作者： ahmad Nabil khairi Mahdzir Sumaiyah Mat Shi Rui Seow Rizal abdul Rani Muhammad Kamil Che Hasan Nor Hamdan Mohamad Yahaya Physiotherapy Programme Faculty of Health SciencesUniversiti Kebangsaan MalaysiaKuala Lumpur 50300Kuala LumpurMalaysia Center for Healthy Ageing and Wellness Faculty of Health SciencesUniversiti Kebangsaan MalaysiaKuala Lumpur 50300Kuala LumpurMalaysia Department of Orthopedic&Traumatology Faculty of MedicineUniversiti Kebangsaan MalaysiaKuala Lumpur 56000Kuala LumpurMalaysia Department of Medical Surgical Nursing Kulliyyah of NursingInternational Islamic University MalaysiaKuantan 25200PahangMalaysia

BACKGROUND The study sought to understand the self-management strategies used by patients during the postponement of their total knee arthroplasty(TKA)procedure,as well as the associations between the length of waiting time,pain,and physical frailty and *** study focused on individuals aged 50 years and above,as they are known to be more vulnerable to the negative impacts of delayed elective surgery and *** study hypothesizes that delayed TKR due to coronavirus disease 2019(COVID-19)will bear negative effect in self-management,pain,and physical frailty and function in older *** To investigate the effects of COVID-19 pandemic on self-management,pain,and physical function in older adults awaiting TKA in *** This cross-sectional study has the data of participants,who matched the criteria and scheduled for TKA for the first time,extracted from the TKA registry in the Department of Orthopaedics and Traumatology,Hospital Canselor Tuanku *** on pain status,and self-management,physical frailty,and instrumental activities daily living were also *** linear regression analysis with a significant level of 0.05 was used to identify the association between waiting time and pain on physical frailty and functional *** Out of 180 had deferred TKA,50%of them aged 50 years old and above,80%were women with ethnic distribution Malay(66%),Chinese(22%),Indian(10%),and others(2%)***-two percent of the participants took medication to manage their pain during the waiting time,while 10%used herbs and traditional supplements,and 68%did exercises as part of their osteoarthritis(OA)***-six participants were found to have physical frailty(strength,assistance with walking,rising from a chair,climbing stairs,and falls questionnaire score>4)which accounted for 72%.Increased pain was associated with physical frailty with odds ratio,odds ratio(95%confidence interval):1.46(1.04-2.05).

关键词： Osteoarthritis Total knee arthroplasty Aged COVID-19 Pain Functional performance

Design, mechanism, delivery and therapeutics of canonical and Dicer-substrate siRNA

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Pharmaceutical Sciences 2019年第5期14卷 497-510页

作者： Maria abdul Ghafoor Raja Haliza Katas Muhammad wahab Amjad Department of Pharmaceutics Faculty of PharmacyNorthern Border UniversityRafha73211Saudi Arabia Centre for Drug Delivery Research Faculty of PharmacyUniversiti Kebangsaan MalaysiaKuala Lumpur50300Malaysia

Upon the discovery of RNA interference(RNAi),canonical small interfering RNA(si RNA) has been recognized to trigger sequence-specific gene silencing. Despite the benefits of si RNAs as potential new drugs,there are obstacles still to be overcome,including off-target effects and immune stimulation. More recently,Dicer substrate si RNA(Dsi RNA) has been introduced as an alternative to si RNA. Similarly,it also is proving to be potent and target-specific,while rendering less immune stimulation. Dsi RNA is 25–30 nucleotides in length,and is further cleaved and processed by the Dicer enzyme. As with si RNA,it is crucial to design and develop a stable,safe,and efficient system for the delivery of Dsi RNA into the cytoplasm of targeted cells. Several polymeric nanoparticle systems have been well established to load Dsi RNA for in vitro and in vivo delivery,thereby overcoming a major hurdle in the therapeutic uses of Dsi RNA. The present review focuses on a comparison of si RNA and Dsi RNA on the basis of their design,mechanism,in vitro and in vivo delivery,and therapeutics.

关键词： RNA interference Drug delivery system Polymeric nanoparticles Gene silencing Gene carrier Non-viral vector

COVID-19 in Social Media:the Effect of Fear Appeal Messages in Facebook in User's Hygienic Perception

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

COVID-19 in Social Media:the Effect of Fear Appeal Messages ...

作者： abdul wahab Siddiqi 上海交通大学

学位级别：硕士

With the outbreak of COVID-19 disease in late 2019,a massive wave of fear appeal messages related to this disease was published in the world *** users also widely spread fear appeal messages related to *** research uses the theory of EPPM to explore the impact of COVID-19 related fear appeal messages in Facebook social networks on the hygienic perception of Facebook users in *** achieve this goal,a nationwide paper-and-pen survey was conducted in five populated provinces of Afghanistan among Facebook users who were exposed to Fear appeal messages related to *** EPPM questionnaire was developed using the World Health Organization recommendations,and after confirming its reliability,it was provided to 425 Facebook *** using the non-random quota sampling method,the samples were *** analyze the obtained data,Pearson correlation coefficients and multilinear regression tests with a 95% confidence level(P <0.05)were used using SPSS 25 *** Pearson correlation coefficient results show a significant positive relationship between the Facebook users' perception of threat severity,perception of susceptibility to COVID-19,perception of self-efficacy,perception of response efficacy,and Fear appeal *** multilinear regression results show that the variables of perceived threat severity and perceived susceptibility of Facebook users in Afghanistan can be predicted through the exposure to Fear appeal *** contrast,the self-efficacy and the response efficacy variables cannot be predicted by Facebook users' exposure to Fear appeal ***,as Facebook users in Afghanistan perceived a more significant threat of COVID-19 than self-efficacy,they were led to the process of fear control.

关键词： EPPM Fear appeal messages Perceived threat severity Perceived susceptibility Perceived self-efficacy Perceived response efficacy COVID-19

In vitro analysis on bactericidal screening and antioxidant potentiality of leaf and root extracts of Thottea siliquosa(Lam.)Ding *** ethnobotanical plant

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2013年第11期3卷 859-865页

作者： Saiba abdul wahab Nusaiba Kumaraswamy Murugan College of Pharmaceutical Sciences Medical College Plant Biochemistry and Molecular Biology Laboratory Department of BotanyUniversity College

Objective:Natural products of plant origin are potential source of novel antimicrobial and antioxidative *** siliquosa(Lam.)Ding Hou.(***).A medicinal herb used by local tribals for treating various *** present study aims at the phytochemical screening,GC-MS analysis,in vitro antibacterial activity and antioxidant potentiality of root and leaf extracts of ***:Hot continuous Soxhlct extraction,GC-MS analysis,antibacterial analysis by disc diffusion,microdilution assay and antioxidant potentialities by hydroxyl radical and nitric oxide radical *** data was statistically ***:Phytochemical screening of the ethyl acetate and methanolic extract of leaf and root revealed the presence of phenols,alkaloids,tannins and *** extract revealed a pool of phytochemicals by comparison with authentic standards from spectral *** the extracts has shown their broad spectrum of inhibition against the selected bacteria Staphylococcus aureus,Escherichia coli,Pseudomonas aeruginosa and Klebsiella pneumonia compared with standard antibiotic drug *** extracts showed antioxidant activity by scavenging of free radicals such as hydroxyl and nitric *** IC_(50)values of the ethyl acetate extracts leaf and root and standard in this assay were I67.5±0.67,99.4±1.2,192±2.5μg/mL *** those methanolic extracts of leaf and root were 269.5±0.89 and 289.1±2.66μg/mL ***,ethyl acetate and methanolic extracts also caused a moderate dose-dependent inhibition of nitric oxide with an IC_(50)range 65.5±1.55 to 148±3.09μg/*** inhibitory activities were found to be dose ***:The present study provides evidence that ethyl acetate and methanol extract of leaf and root of *** are potential source of natural antioxidants and bactericidal *** is essential that research should continue to isolate and purify the bio active components of this natural p

关键词： Antibacterial activity Antioxidant potentiality Phytochemicals Soxhlet extraction Thottea siliquosa

Autonomous Unmanned Aerial Vehicles Based Decision Support System for Weed Management

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第10期73卷 899-915页

作者： Ashit Kumar Dutta Yasser Albagory abdul Rahaman wahab Sait Ismail Mohamed Keshta Department of Computer Science and Information Systems College of Applied SciencesAlMaarefa UniversityAd DiriyahRiyadh13713Kingdom of Saudi Arabia Department of Computer Engineering College of Computers and Information TechnologyTaif UniversityTaif21944Kingdom of Saudi Arabia Department of Archives and Communication King Faisal UniversityAl AhsaHofuf31982Kingdom of Saudi Arabia

Recently,autonomous systems become a hot research topic among industrialists and academicians due to their applicability in different domains such as healthcare,agriculture,industrial automation,*** the interesting applications of autonomous systems,their applicability in agricultural sector becomes *** unmanned aerial vehicles(UAVs)can be used for suitable site-specific weed management(SSWM)to improve crop *** spite of substantial advancements in UAV based data collection systems,automated weed detection still remains a tedious task owing to the high resemblance of weeds to the *** recently developed deep learning(DL)models have exhibited effective performance in several data classification *** this aspect,this paper focuses on the design of autonomous UAVs with decision support system for weed management(AUAV-DSSWM)*** proposed AUAV-DSSWM technique intends to identify the weeds by the use of UAV images acquired from the target ***,the AUAV-DSSWM technique primarily performs image acquisition and image pre-processing ***,the Adam optimizer with You Only Look Once Object Detector-(YOLOv3)model is applied for the detection of *** the effective classification of weeds and crops,the poor and rich optimization(PRO)algorithm with softmax layer is *** design of Adam optimizer and PRO algorithm for the parameter tuning process results in enhanced weed detection performance.A wide range of simulations take place on UAV images and the experimental results exhibit the promising performance of the AUAV-DSSWM technique over the other recent techniques with the accy of 99.23%.

关键词： Autonomous systems object detection precision agriculture unmanned aerial vehicles deep learning parameter tuning