Abstract Aiming at the defect that there is no ability for conventional weighted comprehensive assessment method (WCA) to grade drought risk directly, a based on k-means cluster points realize classification of proposed in this paper. On basis calculating value points, inverse distance weight interpolation (IDWI) and multidimensional normal diffusion (MND) were used quantify value, discriminati...

Bacterial adhesion onto hospital material surfaces still represents a big healthcare issue, being preventive measures required to mitigate this problem, such as increasing surface hydrophilicity. In the present study, gum Arabic, hydrophilic polysaccharide, was used modify of polyethylene terephthalate (PET). Initial water contact angle (WCA) and WCA after several washing cycles were studied re...

Clustering methods allow fast connection and also better routing and topology management of mobile ad hoc networks (MANET). In this paper a survey of clustering techniques for MANET is presented and some preliminary concepts for designing clustering algorithms are introduced. These concepts relate to network topology, routing schemes, graph partitioning and mobility algorithms. In addition, som...

Recent years witness a great deal of interest in artificial intelligence (AI) tools the area optimization. AI has developed large number to solve most difficult search-and-optimization problems computer science and operations research. Indeed, metaheuristic-based algorithms are sub-field AI. This study presents use metaheuristic algorithm, that is, water cycle algorithm (WCA), transportation pr...

A novel amphiphilic graft copolymer possessing polypropylene (PP) main chain and poly(oligoethylene glycol methacrylate) (POEGMA) pendant units was synthesized starting from chlorinated (PP-Cl), characterized. PP-Cl produced macroradicals at chlorine bounded carbon atoms by visible light irradiation in the presence of dimanganese decacarbonyl [Mn2(CO)10] initiated free-radical photopolymerizati...

در این پژوهش مسئله زمان‌بندی کار کارگاهی منعطف با ماشین‌های موازی درنظرگرفتن معیار تولید پاک‌تر، منابع دوگانه انسان-ماشین، زمان دسترسی کارها و پردازش وابسته به سرعت ماشین‌ها بررسی می­‌شود. اهداف شامل حداقل­‌کردن مجموع جریمه‌­های دیرکرد زودکرد افزایش است. داده می‌شود تا تکمیل کاهش یابد. درحالی‌که آلودگی صوتی محیط تولیدی منجر توجه رویکرد پاک‌تر که نگرشی پیشگیرانه است، اینجا سعی شده است حداقل­کردن...

Abstract Superhydrophobic surface coatings have enormous potential to protect wood from excessive water uptake. Unfortunately, such often require toxic chemicals or complex fabrication methods, and their mechanical stability is very limited. As an alternative, highly water-repellent surfaces with mean contact angles (WCAs) of 160° were prepared by straightforward spray-deposition alkyl ketene d...

در این مقاله یک مدل ریاضی برای مسئله سیستم تولیدی همکارانه ساخت بر اساس سفارش با رعایت انصاف تخصیص بار‌های تولید طراحی شده است. اهداف اصلی مدل، کمینه‌سازی هزینه‌‌های کل و حداکثر استفاده از منابع به‌منظور عادلانه شرایط عدم­قطعیت کنترل پارامتر‌های غیرقطعی روش برنامه‌ریزی فازی ‌شده نتایج نشان می‌دهد افزایش نرخ عدم‌قطعیت، می­یابد. ازآنجاکه ظرفیت کارخانه‌ها ثابت است، مقدار تقاضا، هر کارخانه نیز می­ی...

The present study aims to investigate the effects of gum rosin (GR) microspheres coating over hydrophobicity outer layer a polypropylene (PP) based surgical face mask. was deposited surface mask by electrospraying technique. deposition GR confirmed field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR) analysis. thermal analysis determined coopera...