检索结果-南通市图书馆

Effect of body material and temperature variation on the performance of the time delay pyrotechnic compositions

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

Defence Technology（防务技术） 2018年第3期14卷 261-265页

作者： Azizullah Khan Abdul Qadeer Malik Zulfiqar Hameed Lodhi zain ul abdin School of Chemical and Materials Engineering (SCME) National University of Sciences and Technology (NUST)

Significance of body material and temperature variation on burning time and burning rate of Si/Pb O/Pb_3O_4/FG and B/BaCrO_4/FG pyrotechnic delay compositions were experimentally studied. Brass and stainless steel were used as delay body materials. High resolution oscilloscope and a customized chronometer were simultaneously used for the measurement of burning time and burning rate. Results reveal that brass material with controlled column dimensions reduced the variation in burning time of Si/Pb O/Pb_3O_4/FG delay mixture from 7.43% to 4.17% and that of B/Ba CrO_4/FG mixture from 16.83% to 9.39%.Similarly the variation in burning rate was reduced from 7.57% to 4.12% and from 17% to 9.69% for Si/Pb O/Pb_3O_4/FG and B/BaCrO_4/FG mixtures respectively. Si/PbO/Pb_3O_4/FG delay mixture was also subjected to temperature ranging from -54℃ up to+100℃. The burning rate of this composition varied linearly with temperature. Burning rate increased from 28.01 mm/s to 34.38 mm/s when the temperature was varied from -54℃ to +100℃.

关键词：温度变化体材料时间烟火身体表演混合物高分辨率

用于阴离子识别的二茂铁基偶氮苯化合物的合成（英文）

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) 2016年第2期17卷 144-154页

作者： Xiao-ting ZHAI Hao-jie YU Li WANG Zheng DENG zain-ul abdin Yong-sheng CHEN The State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang University

目的:研究二茂铁基偶氮苯化合物的光电响应性能及离子识别性能,并研究取代基对其离子识别性能的影响。创新点:考察取代基对于二茂铁基偶氮苯化合物的影响,并提出可能的机理。方法:循环伏安(CV)法和紫外可见吸收光谱(UV-vis)法。结论:通... 详细信息

目的:研究二茂铁基偶氮苯化合物的光电响应性能及离子识别性能,并研究取代基对其离子识别性能的影响。创新点:考察取代基对于二茂铁基偶氮苯化合物的影响,并提出可能的机理。方法:循环伏安(CV)法和紫外可见吸收光谱(UV-vis)法。结论:通过CV法和UV-vis法研究二茂铁基偶氮苯化合物的离子识别性能,发现硝基取代的化合物对于F^-和H_2PO_4^-具有选择性离子识别作用,而氨基取代的化合物则识别作用不明显。

关键词：二茂铁偶氮苯光电响应离子识别

Parasitic Effects of Solitary Endoparasitoid, Aenasius bambawalei Hayat (Hymenoptera: Encyrtidae) on Cotton Mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae)

在线全文

学校读者我要写书评

暂无评论

Advances in Entomology 2016年第2期4卷 90-96页

作者： Muhammad Qammar Shahzad zain ul abdin Saqi Kosar Abbas Muhammad Tahir Fiaz Hussain Department of Entomology University of Agriculture Faisalabad Pakistan

Parasitization has an enormous impact on host physiology, development and reproduction. The effect of parasitism by endoparasitoid, Aenasius bambawalei Hayat (Hymenoptera: Encyrtidae) on survival and reproduction of mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) on different host stages was studied. Our data reveals that host mealybugs parasitized by the wasp at the 2nd instar stage were died during the 3rd instar stage of their life. However, those parasitized at the 3rd instar stage could reach the adult stage and were able to produce their progeny. After 6 days of parasitization, all parasitized hosts of the 2nd, 3rd and adult stages were died except the 1st instar. Results showed that parasitized host mealybugs had significantly lower reproductive potential than the unparasitized ones. Maximum parasitoid emergence was recorded in the 3rd instar host stage. This basic research regarding survival and reproduction of the parasitized host mealybugs would be very helpful in devising sustainable biological control strategies for cotton mealybug.

关键词： Parasitization Cotton Mealybug A. bambawalei Instars Reproduction

Reinforcing the management of type 1 gastric esophageal varices

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

World Journal of Gastroenterology 2024年第19期30卷 2615-2617页

作者： zain Majid Ghazi Abrar Department of Gastroenterology Sindh Institute of Urology and TransplantationKarachi 75500Pakistan

Variceal bleed represents an important complication of cirrhosis,with its presence reflecting the severity of liver *** varices,though less frequently seen than esophageal varices,present a distinct clinical challenge due to its higher intensity of bleeding and associated *** upon the Sarin classification,GOV1 is the most common subtype of gastric varices seen in clinical practice.

关键词： Gastric varices Sarin classification Gastroesophageal varices Cyanoacrylate Endoscopic variceal ligation Trans jugular intrahepatic portosystemic shunt

UV固化的环氧丙烯酸树脂耐磨加硬涂层的制备及性能（英文）

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

材料科学与工程学报 2016年第2期34卷 181-187页

作者：任鹏飞王立俞豪杰田志飞任福杰邓正陈永盛 zain-ul abdin Muhammad Saleem 浙江大学化学工程与生物工程学院化学工程国家重点实验室浙江杭州310027

本文通过环氧树脂和丙烯酸为原料反应合成了环氧丙烯酸树脂(EA),然后用硅烷偶联剂3-甲基丙烯酰氧丙基三甲氧基硅烷(MPS)对其进行改性,得到可紫外光固化的有机硅耐磨透明涂层,并对涂层的各种性能进行了测试,如硬度测试、附着力测试和耐... 详细信息

本文通过环氧树脂和丙烯酸为原料反应合成了环氧丙烯酸树脂(EA),然后用硅烷偶联剂3-甲基丙烯酰氧丙基三甲氧基硅烷(MPS)对其进行改性,得到可紫外光固化的有机硅耐磨透明涂层,并对涂层的各种性能进行了测试,如硬度测试、附着力测试和耐磨性能测试等。结果表明,相比未涂覆的有机玻璃基材,涂覆后的有机玻璃基材的表面硬度和透光率均有所增加,且随硅烷偶联剂含量的增加而有所提高。对耐磨涂层的热稳定性也进行了研究,结果发现,改性后的环氧丙烯酸树脂的热稳定性要明显好于未改性的。

关键词： UV固化涂料环氧丙烯酸树脂耐磨性能

Identification of Software Bugs by Analyzing Natural Language-Based Requirements Using Optimized Deep Learning Features

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第3期78卷 4379-4397页

作者： Qazi Mazhar ul Haq Fahim Arif Khursheed Aurangzeb Noor ul Ain Javed Ali Khan Saddaf Rubab Muhammad Shahid Anwar Department of Computer Science and Engineering and International Bachelor’s Program in Informatics Yuan Ze UniversityZhongliTaoyuan320315Taiwan Department of Computer Science National University of PakistanRawalpindiPunjab46000Pakistan Department of Computer Software Engineering MCSNational University of Sciences and TechnologyIslamabad44000Pakistan Department of Computer Engineering College of Computer and Information SciencesKing Saud UniversityP.O.Box 51178Riyadh11543Saudi Arabia Department of Computer Science School of PhysicsEngineering and Computer ScienceUniversity of HertfordshireHatfieldAL109ABUK Department of Computer Engineering College of Computing and InformaticsUniversity of SharjahSharjah27272United Arab Emirates Department of AI and Software Gachon UniversitySeongnam-SI13120South Korea

Software project outcomes heavily depend on natural language requirements,often causing diverse interpretations and issues like ambiguities and incomplete or faulty *** are exploring machine learning to predict software bugs,but a more precise and general approach is *** bug prediction is crucial for software evolution and user training,prompting an investigation into deep and ensemble learning ***,these studies are not generalized and efficient when extended to other ***,this paper proposed a hybrid approach combining multiple techniques to explore their effectiveness on bug identification *** methods involved feature selection,which is used to reduce the dimensionality and redundancy of features and select only the relevant ones;transfer learning is used to train and test the model on different datasets to analyze how much of the learning is passed to other datasets,and ensemble method is utilized to explore the increase in performance upon combining multiple classifiers in a *** National Aeronautics and Space Administration(NASA)and four Promise datasets are used in the study,showing an increase in the model’s performance by providing better Area Under the Receiver Operating Characteristic Curve(AUC-ROC)values when different classifiers were *** reveals that using an amalgam of techniques such as those used in this study,feature selection,transfer learning,and ensemble methods prove helpful in optimizing the software bug prediction models and providing high-performing,useful end mode.

关键词： Natural language processing software bug prediction transfer learning ensemble learning feature selection

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

二茂铁基噻吩与3-己基噻吩共聚研究

二茂铁基噻吩与3-己基噻吩共聚研究

Robust design of sliding mode control for airship trajectory tracking with uncertainty and disturbance estimation

第十八届全国波谱学学术年会

作者： Hamad Khalid 俞豪杰王立 Muhammad Akram Nasir M.Abbasi zain-ul-abdin Muhammad Saleem 化学工程联合国家重点实验室化学工程与生物工程学系浙江大学化学工程联合国家重点实验室化学工程与生物工程学系

＜正＞聚噻吩的超共轭结构使其具有独特的光学和电学性能,在有机太阳能电池、场效应晶体管和有机电子学方面有很好的应用前景,最近数十年来获得研究者们的关注。二茂铁基由于其可逆的氧化还原性能在化学和生物传感器方面有着应用。有文...

＜正＞聚噻吩的超共轭结构使其具有独特的光学和电学性能,在有机太阳能电池、场效应晶体管和有机电子学方面有很好的应用前景,最近数十年来获得研究者们的关注。二茂铁基由于其可逆的氧化还原性能在化学和生物传感器方面有着应用。有文献报道了噻吩与二茂铁结合起来用作有机信息存储和化学传感器等。基于这两种基团的特性,我们合成了二茂铁基噻吩（TEF）,再选用反应条件简单温和的氧化聚合法将TEF与3-己基噻吩（3HT）共聚。噻吩环上2位与5位碳参与反应失去质子。聚合过程可由1H-MNR监控,观察噻吩环上质子的

关键词：

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

Journal of Systems Engineering and Electronics 2024年第1期35卷 242-258页

作者： WASIM Muhammad ALI Ahsan CHOUDHRY Mohammad Ahmad SHAIKH Inam ul Hasan SALEEM Faisal Department of Aeronautics and Astronautics Engineering Institute of Space TechnologyIslamabad 44000Pakistan Department of Electrical Engineering University of Engineering and TechnologyTaxila 47080Pakistan Department of Measurements and Control Systems Silesian University of TechnologyGliwice 44-101Poland The Joint Doctoral School Silesian University of TechnologyGliwice 44-100Poland

The robotic airship can provide a promising aerostatic platform for many potential *** applications require a precise autonomous trajectory tracking control for *** has a nonlinear and uncertain *** is prone to wind disturbances that offer a challenge for a trajectory tracking control *** paper addresses the airship trajectory tracking problem having time varying reference path.A lumped parameter estimation approach under model uncertainties and wind disturbances is opted against distributed *** uses extended Kalman filter(EKF)for uncertainty and disturbance *** estimated parameters are used by sliding mode controller(SMC)for ultimate control of airship trajectory *** comprehensive algorithm,EKF based SMC(ESMC),is used as a robust solution to track airship *** proposed estimator provides the estimates of wind disturbances as well as model uncertainty due to the mass matrix variations and aerodynamic model *** stability and convergence of the proposed method are investigated using the Lyapunov stability *** simulation results show that the proposed method efficiently tracks the desired *** method solves the stability,convergence,and chattering problem of SMC under model uncertainties and wind disturbances.

关键词： airship chattering extended Kalman filter(EKF) model uncertainties estimation sliding mode controller(SMC)

在线全文

学校读者我要写书评

暂无评论

聚磷腈的合成与表征

聚磷腈的合成与表征