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纳米-生物界面定量分析及其在纳米医学领域的应用

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纳米-生物界面定量分析及其在纳米医学领域的应用

Thermal Loss Analysis of a Flat Plate Solar Collector Using Numerical Simulation

第十四届中国包头·稀土产业论坛、中国稀土学会2022学术年会

作者：王黎明丛亚林 didar baimanov 陈春英

纳米材料与生物体作用过程复杂,生物体的纳米材料含量低、多组分、动态变化等特点,给生物体系纳米材料的分析带来重大挑战。针对上述分析难题,以同步辐射大科学装置为基础,发展了高灵敏、高分辨、原位定量与定位分析方法:建立纳米材料... 详细信息

纳米材料与生物体作用过程复杂,生物体的纳米材料含量低、多组分、动态变化等特点,给生物体系纳米材料的分析带来重大挑战。针对上述分析难题,以同步辐射大科学装置为基础,发展了高灵敏、高分辨、原位定量与定位分析方法:建立纳米材料与蛋白质、与磷脂分子吸附结构的定量分析方法,;进一步发展单细胞超高分辨的元素成像方法,用于观察单细胞内纳米材料空间分布与行为5-6;发展原位化学分析方法,表征体内水平、生物微环境及细胞内纳米材料发生的化学反应。综合这些方法,研究金属纳米材料在个体到单细胞水平的转运和转化过程及生物安全性机制,研究金属纳米药物抗新冠病毒及抗菌的物理化学机制系统地揭示纳米材料与生物体作用的规律及应用潜力。

关键词： nano-bio interface protein corona single cell imaging antiviral nanomaterial

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Computers, Materials & Continua 2022年第12期73卷 4627-4640页

作者： Timur Merembayev Yedilkhan Amirgaliyev Murat Kunelbayev didar Yedilkhan Institute of Information and Computational Technologies CS MES RK AlmatyKazakhstan International Information Technology University AlmatyKazakhstan Al-Farabi Kazakh National University AlmatyKazakhstan Astana IT University Nur-SultanKazakhstan

In this paper,we studied theoretically and numerically heated losses of a flat solar collector to model the solar water heating system for the Kazakhstan climate *** different climatic zones with a growing cost for energy or lack of central heating systems,promising is to find ways to improve the energy efficiency of the solar *** mathematical model(based on ordinary differential equation)simulated the solar system work process under different *** bridge the modeling and real values results,we studied the important physical parameters such as loss coefficient,Nu,Ra,and Pr *** impacted the efficiency of flat solar collectors and heat losses of the *** developed mathematical models,the design and composition of the software and hardware complex,and automated control and monitoring systems allow solar hot water heating systems to increase the energy efficiency of life support systems and heat supply of buildings by reducing energy consumption for heat *** simulation result showed that during the daytime,the temperature of water in the collector is 70°C;the storage of heated water since heated water is cooled at *** defined that a work period of the system can be extended with high efficiency(April-October)for Almaty region.

关键词： Solar heating system heat loss coefficient dynamic simulation flat plate collector

利用第一性原理模拟研究Li和LiO_(2)的溶剂化结构和动力学及其在非水有机电解质溶剂中的转化

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Chinese Journal of Catalysis 2022年第11期43卷 2850-2857页

作者： Behnaz Rahmani didar Axel Groß 乌尔姆大学理论化学研究所德国乌尔姆乌尔姆赫尔姆霍兹研究所电化学储能德国乌尔姆

利用密度泛函理论计算和从头算分子动力学(AIMD)模拟研究了三种有机电解质中Li^(+)和LiO_(2)在O_(2)还原时的溶剂化、扩散和转化.这些过程对锂空气电池的性能至关重要.除详细研究溶剂化壳层结构外,还利用AIMD模拟推导了扩散率,并与Blue-... 详细信息

利用密度泛函理论计算和从头算分子动力学(AIMD)模拟研究了三种有机电解质中Li^(+)和LiO_(2)在O_(2)还原时的溶剂化、扩散和转化.这些过程对锂空气电池的性能至关重要.除详细研究溶剂化壳层结构外,还利用AIMD模拟推导了扩散率,并与Blue-Moon系综方法一起探索Li^(+)和O_(2)-形成LiO_(2)以及2LiO_(2)歧化为Li_(2)O_(2)+O_(2).通过对比模拟结果和气相计算结果,研究电解质对这些反应的影响,结果表明,对于参与这些反应的离子物种,电解质的影响更为显著.

关键词： Li-空气电池氧化锂氧还原密度泛函理论从头算分子动力学溶剂化扩散歧化

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Comparative in vitro Study of the biological activity and chemical composition extracts of Helicteres isora L. obtained by water and subcritical water extraction

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Food Quality and Safety 2020年第2期4卷 101-106页

作者： Zohreh didar Department of Food Science and Technology Neyshabur BranchIslamic Azad UniversityNeyshaburIran

Objectives:Subcritical water extraction technique is considered as an environmentally extraction *** aim of this study was to compare the different characteristics of water extract and subcritical water extract of Helicteres isora *** and Methods:Water extraction was performed under the following conditions:25℃,24 h,and solid-to-water ratio 1:*** water extract was carried out under specific conditions(pressure=10 bar,temperature=160℃,solid-to-water ratio=1:30,time=30 min).Chemical composition analysis was performed using GC-Mass ***-biofilm activity in the terms of anti-attach and removal of biofilm were assessed using the ELISA reader method and reading absorbance at 570 ***-microbial activity against Bacillus cereus,Staphylococcus aureus,Staphylococcus saprophyticus,and Bacillus subtilis was investigated by measurement of inhibitory zone ***-enzymatic and antioxidant properties were also ***:The results of GC-Mass analysis showed some components extracted in subcritical method which were absent in water extract such as octadecanoic acid,hexadecanoic acid,and *** activity of the two tested extracts revealed that subcritical water extract had more antioxidant capacity than water extract(P≤0.05).The two tested extracts exhibited anti-enzymatic activity against polyphenol oxidase enzyme with better performance of subcritical water ***-biofilm activity of the two extracts implies that,in the case of preventing biofilm formation,both extracts had similar efficiency but in the removal of biofilm,subcritical water extract showed better *** extracts had anti-microbial activity against ***,***,***,and *** with better performance of subcritical water ***-enzymatic assay also showed similar ***:Subcritical water extract of *** showed more antioxidant activity as well as anti-biofilm,anti-bacterial,and anti-enz

关键词： Helicteres isora L. subcritical water anti-biofilm antioxidant anti-bacterial

A PRIORITY-BASED NEGOTIATIONS APPROACH FOR HANDLING INCONSISTENCIES IN MULTI-PERSPECTIVE SOFTWARE REQUIREMENTS

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Journal of Systems Science & Complexity 2008年第4期21卷 574-596页

作者： Kedian MU Zhi JIN didar ZOWGHI School of Mathematical Sciences Peking University Beijing 100871 China. Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100190 China. Faculty of Engineering and Information Technology University of Technology Sydney NSW 2007 Australia.

多观点要求说明的矛盾在要求过程期间是一个弥漫的问题。然而，管理矛盾不只是一个纯技术问题。它总是在相应股东之中与相互作用和比赛的一个过程被联系。这篇论文的主要贡献是介绍一条协商途径给在多观点软件要求处理矛盾。特别地，相... 详细信息

多观点要求说明的矛盾在要求过程期间是一个弥漫的问题。然而，管理矛盾不只是一个纯技术问题。它总是在相应股东之中与相互作用和比赛的一个过程被联系。这篇论文的主要贡献是介绍一条协商途径给在多观点软件要求处理矛盾。特别地，相对每个观点的要求的优先级在在不同股东之中解决矛盾上在继续的协商起一个重要作用。产生到评估建议的协商建议和一条途径的一个算法也分别地在这篇论文被介绍。

关键词：自动协商优先权矛盾处理软件需求

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Implementation decision making for internetware driven by quality requirements

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Science China(Information Sciences) 2014年第7期57卷 55-73页

作者： WEI Bo JIN Zhi ZOWGHI didar YIN Bin Academy of Mathematics and Systems Science Chinese Academy of Sciences Key Lab.of High Confidence Software Technologies Ministry of EducationPeking University

Internetware is an emerging software paradigm in the open,dynamic and ever-changing Internet environment.A successful internetware must demonstrate acceptable degree of quality when carrying out its ***,when internetware is being dynamically constructed,making implementation decisions to satisfice the quality requirements becomes a critical *** the traditional software engineering,quality requirements are usually refined stepwise by sub-requirements utilizing goal modeling perspective,until some potential functional design alternatives are *** goal-oriented paradigms have adopted graphical goal models to reason about quality requirements and proposed qualitative or quantitative reasoning ***,these techniques may become unviable due to the ever-changing operating environment and demands for run-time decision *** this paper,we propose an approach for implementation decision making driven by quality requirements for *** focuses on the symbolic formula representation of requirements goal models with the tree structure,which is of well-defined syntax and clear ***,we explore some reasoning rules which effectively automate each reasoning action on the *** supports multiple-factor decision making.A case study is also provided to illustrate our proposed *** have developed a supporting tool based on our theoretical approach that we also present in this paper.

关键词： design alternatives decision making implementation decision internetware quality requirements

Constant envelope FrFT OFDM: spectral and energy efficiency analysis

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Journal of Systems Engineering and Electronics 2019年第3期30卷 467-473页

作者： DIDA Mussa Ally HUAN Hao TAO Ran WANG Teng URYNBASSAROVA didar School of Information and Electronics Beijing Institute of Technology School of Computational and Communication Science and Engineering Nelson Mandela African Institute of Science and Technology

Constant envelope with a fractional Fourier transformorthogonal frequency division multiplexing(CE-FrFT-OFDM) is a special case of a constant envelope OFDM(CE-OFDM), both being energy efficient wireless communication techniques with a 0 dB peak to average power ratio(PAPR). However, with the proper selection of fractional order, the first technique has a high bit error rate(BER) performance in the frequency-time selective *** paper performs further analysis of CE-FrFT-OFDM by examining its spectral efficiency(SE) and energy efficiency(EE) and compare to the famous OFDM and Fr FT-OFDM techniques. Analytical and comprehensive simulations conducted show that, the CE-Fr FT-OFDM has five times the EE of OFDM and Fr FT-OFDM systems with a slightly less SE. Increasing CE-FrFT-OFDM’s transmission power by increasing its amplitude to 1.7 increases its SE to match that of the OFDM and Fr FT-OFDM systems while slightly reducing its EE by 20% to be four times that of OFDM and Fr FTOFDM systems. OFDM and Fr FT-OFDM’s amplitude fluctuations cause rapid changing output back-off(OBO) power requirements and further reduce power amplifier(PA) efficiency while CE-FrFTOFDM stable operational linear range makes it a better candidate and outperforms the other techniques when their OBO exceeds1.7. Higher EE and low BER in time-frequency selective channel are attracting features for CE-FrFT-OFDM deployment in mobile devices.

关键词： fractional Fourier transform(FrFT) constant envelope spectral efficiency(SE) energy efficiency(EE) high power amplifier

Activity Diagram Synthesis Using Labelled Graphs and the Genetic Algorithm

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Journal of Computer Science & Technology 2021年第6期36卷 1388-1406页

作者： Chun-Hui Wang Zhi Jin Wei Zhang didar Zowghi Hai-Yan Zhao Wen-Pin Jiao Key Laboratory of High Confidence Software Technology(Ministry of Education) Peking University Beijing 100871China Institute of Software School of Electronics Engineering and Computer SciencePeking UniversityBeijing 100871China School of Computer Science Inner Mongolia Normal UniversityHohhot 010022China Faculty of Engineering and Information Technology University of TechnologySydney 2007Australia

Many applications need to meet diverse requirements of a large-scale distributed user *** challenges the current requirements engineering ***-based requirements engineering was proposed as an umbrella term for dealing with the requirements development in the context of the large-scale user ***,there are still many *** others,a key issue is how to merge these requirements to produce the synthesized requirements description when a set of requirements descriptions from different participants are *** techniques are needed for supporting the requirements *** are widely used in industry to represent *** paper chooses the activity diagrams and proposes a novel approach for the activity diagram synthesis which adopts the genetic algorithm to repeatedly modify a population of individual solutions toward an optimal *** a result,it can automatically generate a resulting diagram which combines the commonalities as many as possible while leveraging the variabilities of a set of input *** approach is featured by:1)the labelled graph proposed as the representation of the candidate solutions during the iterative evolution;2)the generalized entropy proposed and defined as the measurement of the solutions;3)the genetic algorithm designed for sorting out the high-quality *** cases of different scales are used to evaluate the effectiveness of the *** experimental results show that not only the approach gets high precision and recall but also the resulting diagram satisfies the properties of minimization and information preservation and can support the requirements traceability.

关键词： crowd-based requirements engineering requirements synthesis activity diagram genetic algorithm

The antioxidant and physicochemical properties of microencapsulated bioactive compounds in Securigera securidaca(L.)seed extract by co-crystallization

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Food Quality and Safety 2019年第4期3卷 243-250页

作者： Ali Behnam Nik Mohsen Vazifedoost Zohreh didar Bahareh Hajirostamloo Department of Food Science and Technology Neyshabur BranchIslamic Azad UniversityNeyshaburIran

Securigera securidaca seed is a good source of phenolic compounds with high antioxidant *** and maintenance of natural antioxidants have always been a challenge and microencapsulation is a suitable method for this *** this study,the chemical compounds of the plant seed extract were identified by GC/MS *** compounds from the seed ethanolic extract were microencapsulated in the sucrose matrix during the co-crystallization *** evaluations included total phenolic compounds,radical scavenging ability,production efficiency,moisture content,and flowability characteristics of the produced powders,such as compressibility index,Hausner ratio,and angle of *** results showed significant differences in the phenolic compounds and the radical scavenging ability between the control sample and the co-crystallized powder(P<0.05).The production efficiency and the moisture content of extract-containing co-crystallized powder were 84%and 0.14%,*** particle size difference of the microencapsulated powder could significantly affect the powder flowability characteristics(P<0.05),and particles with a size of 1 mm showed better flowability ***-IR charts for samples revealed chemical bonds specific to saccharose molecule indicating no changes in covalent bonds present in saccharose molecule structure after the *** electron microscope images showed the presence of vacant spaces and porosity in the structure of saccharose crystals formed during the process of *** a result,the co-crystallized powder obtained from the plant extract can be used as an appropriate antioxidant in the food and pharmaceutical formulations.

关键词： co-crystallization natural antioxidant bioactive flowability