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超塑化剂与水泥流动性能评估

商品混凝土 2007年第1期 67-73页

作者： Kazuo yamada Takumi Sugamata hiroshi Nakanishi 李蓉

为获得持久的混凝土结构,最重要的一步就是混凝土的无损浇注。在过去的十几年里,混凝土材料间的兼容性是控制无损浇注混凝土的工作性的重要问题,这一课题备受关注。每位工程师都希望有可靠的方法检测超塑化剂与水泥的流动性能。在这篇... 详细信息

为获得持久的混凝土结构,最重要的一步就是混凝土的无损浇注。在过去的十几年里,混凝土材料间的兼容性是控制无损浇注混凝土的工作性的重要问题,这一课题备受关注。每位工程师都希望有可靠的方法检测超塑化剂与水泥的流动性能。在这篇文章中,我们从基本原理着眼对检测流动性能的方法进行了论述。重要的一点就是超塑性混凝土的变形性质。当新拌混凝土均质性地变形时,混凝土拌和物的工作性可以被超塑化剂的一个基本理论所解释,也就是,流动性与水化物的表面积超塑化剂吸附量成正比关系。而且,超塑化剂与水泥的流动性检测还应考虑水灰比和材料混合程序等混凝土的实际情况。

关键词：超塑化剂流动性能混凝土拌和物混凝土材料扩展度塑性混凝土坍落混凝土结构混凝土工作性混

On the electrical conductivity of alginate hydrogels

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Regenerative Biomaterials 2018年第5期5卷 293-301页

作者： Georgia Kaklamani Diana Kazaryan James Bowen Fabrice Iacovella Spiros h.Anastasiadis George Deligeorgis Institute of Electronic Structure&Laser Foundation for Research&Technology HellasP.O.Box 138571110 HeraklionCreteGreece School of Engineering and Innovation The Open UniversityMilton Keynes MK76AAUK Department of Chemistry University of CreteP.O.Box 220871003 HeraklionCreteGreece

hydrogels have been extensively used in the field of biomedical applications,offering customizable natural,synthetic or hybrid materials,particularly relevant in the field of tissue *** the bioelectronics discipline,hydrogels are promising mainly as sensing platforms with or without encapsulated cells,showing great potential in healthcare and ***,to date there is little data in the literature which characterizes the electrical properties of tissue engineering materials which are relevant to *** this work,we present electrical characterization of alginate hydrogels,a natural polysaccharide,using a four-probe method similar to electrical impedance *** acquired conductance data show distinct frequency-dependent features that change as a function of alginate and crosslinker concentration reflecting ion kinetics inside the measured ***,the presence of NIh 3T3 fibroblasts encapsulated in the hydrogels matrix was found to alter the artificial tissue’s electrical *** method used provides valuable insight to the frequency-dependent electrical response of the resulting *** is hoped that the outcome of this research will be of use in the development of cell/electronic interfaces,possibly toward diagnostic biosensors and therapeutic bioelectronics.

关键词： alginate bioelectronics conductivity hydrogel polysaccharide resistance fibroblasts

Ambient air pollution and lung disease in China： health effects, study design approaches and future research

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Frontiers of Medicine 2015年第3期9卷 392-400页

作者： Jeffrey h. Mandel Christine Wendt Charles Lo Guangbiao Zhou Marshall hertz Gurumurthy Ramachandran University of Minnesota School of Public health Minneapolis MN 55455 USA University of Minnesota Medical School Veteran 's Administration Hospital Minneapolis MN 55455 USA University of Minnesota Mechanical Engineering Department Minneapolis MN 55455 USA State Key Laboratory of Biomembrane and Membrane Biotechnology Institute of Zoology Chinese Academy of Sciences Beij ing 100101 China University of Minnesota Medical School Minneapolis MN 55455 USA

Ambient air pollution in China has worsened following dramatic increases in industrialization, automobile use and energy consumption. Particularly bothersome is the increase in the PM2.5 fraction of pollutants. This fraction has been associated with increasing rates of cardio-respiratory disease in China and elsewhere. Ambient pollutant levels have been described in many of China＇s cities and are comparable to previous levels in southern California. Lung cancer mortality in China has increased since the 1970s and has been higher in men and in urban areas, the exact explanation for which has not been determined. The estimation of individual risk for Chinese citizens living in areas of air pollution will require further research. Occupational cohort and casecontrol designs each have unique attributes that could make them helpful to use in this setting. Other important future research considerations include detailed exposure assessment and the possible use of biomarkers as a means to better understand and manage the threat posed by air pollution in China.

关键词： air pollution PM2.5 lung disease study design epidemiology

Enhancing Cloud Performance Using File Format Classifications

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Computers, Materials & Continua 2022年第2期70卷 3985-4007页

作者： Muhammad Junaid Adnan Sohail Monagi h.Alkinani Adeel Ahmed Mehmood Ahmed Faisal Rehman Department of Computing Iqra UniversityIslamabadPakistan Department of Computer Science and Artificial Intelligence College of Computer Science and EngineeringUniversity of JeddahJeddahSaudi Arabia Department of Information Technology The University of Haripur Department of Computing COMSATS UniversityAbbottabad CampusPakistan

Metaheuristic approaches in cloud computing have shown significant results due to theirmulti-objective *** approaches are now considering hybridmetaheuristics combining the relative optimized benefits of two or more algorithms resulting in the least tradeoffs among several *** critical factors such as execution time,throughput time,response time,energy consumption,SLA violations,communication overhead,makespan,and migration time need careful attention while designing such dynamic *** improve such factors,an optimizedmulti-objective hybrid algorithm is being proposed that combines the relative advantages of Cat Swarm Optimization(CSO)with machine learning classifiers such as Support Vector Machine(SVM).The adopted approach is based on SVMone to many classification models of machine learning that performs the classifications of various data format types in the cloud with best *** CSO,grouping phase is used to divide the data files as audio,video,image,and text which is further extended by polynomial Kernel function based on various input features and used for optimized load ***,proposed approach works well and achieved performance efficiency in evaluated QoS metrics such as average energy consumption by 12%,migration time by 9%,and optimization time by 10%,in the presence of competitor baselines.

关键词： Classification load balancing optimization cloud computing

Effects of single and dual species herbivory on the behavioral responses of three thrips species to cotton seedlings

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Insect Science 2017年第4期24卷 684-698页

作者： Rehan Silva Gimme h. Walter Lewis J. Wilson Michael J. Furlong School of Biological Sciences The University of Queensland St. Lucia Queensland 4072 Australia Cotton Research Unit CSIRO Agriculture Flagship Locked Bag 59 Narrabri NSW 2390 Australia

This study investigated the olfactory responses of 3 thrips species [Frankliniella schultzei Trybom, E occidentalis Pergrande and Thrips tabaci Lindeman （Thysanoptera： Thripidae）] to cotton seedlings [Gossypium hirsutum L. （Malvales： Malvaceae）] simulta- neously damaged by different combinations of herbivores. Cotton seedlings were damaged by foliar feeding Tetranychus urticae Koch （Trombidiforms： Tetranychidae）, helicoverpa armigera hibner （Lepidoptera： Noctuidae）, Aphis＇ gossypii Glover （hemiptera： Aphidi- dae） or root feeding Tenebrio molitor L. （Coleoptera： Tenebrionidae）. Thrips responses to plants simultaneously damaged by 2 species of herbivore were additive and equivalent to the sum of the responses of thrips to plants damaged by single herbivore species feeding alone. For example, E occidentalis was attracted to T. urticae damaged plants but more attracted to undamaged plants than to plants damaged by h. armigera. Plants simultane- ously damaged by low densities of T. urticae and h. armigera repelled E occidentalis but as T. urticae density increased relative to h. armigera density, E occidentalis attraction to coinfested plants increased proportionally. Thrips tabaci did not discriminate between un- damaged plants and plants damaged by h. armigera but were attracted to plants damaged by T. urticae alone or simultaneously damaged by T. urticae and h. armigera. Olfactometer assays showed that simultaneous feeding by 2 herbivores on a plant can affect predator- prey interactions. Attraction of F. occidentalis to plants damaged by its T. urticae prey was reduced when the plant was simultaneously damaged by h. armigera, T. molitor, or A. gossypii and F. schultzei was more attracted to plants simultaneously damaged by T. urticae and h. armigera than to plants damaged by T. urticae alone. We conclude that plant responses to feeding by I species of herbivore are affected by responses to feeding by other herbivores. These plant-mediated interactions between herbivo

关键词： attraction dual-herbivory Frankliniella occidentalis Frankliniella schultzei induced responses predictability simultaneous damage Thrips tabaci

Performance of Gradient-Based Optimizer for Optimum Wind Cube Design

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Computers, Materials & Continua 2022年第4期71卷 339-353页

作者： Alaa A.K.Ismaeel Essam h.houssein Amir Y.hassan Mokhtar Said Faculty of Computer Studies(FCS) Arab Open University(AOU)Muscat130Sultanate of Oman Faculty of Science Minia UniversityMiniaEgypt Faculty of Computers and Information Minia UniversityMiniaEgypt Electronics Research Institute GizaEgypt Electrical Engineering Department Faculty of EngineeringFayoum UniversityFayoumEgypt

Renewable energy is a safe and limitless energy source that can be utilized for heating,cooling,and other *** energy is one of the most important renewable energy *** fluctuation of wind turbines occurs due to variation of wind velocity.A wind cube is used to decrease power fluctuation and increase the wind turbine’s *** optimum design for a wind cube is the main contribution of this *** decisive design parameters used to optimize the wind cube are its inner and outer radius,the roughness factor,and the height of the wind turbine hub.A Gradient-Based Optimizer(GBO)is used as a new metaheuristic algorithm in this *** objective function of this research includes two parts:the first part is to minimize the probability of generated energy loss,and the second is to minimize the cost of the wind turbine and wind *** Gradient-Based Optimizer(GBO)is applied to optimize the variables of two wind turbine types and the design of the wind *** metrological data of the Red Sea governorate of Egypt is used as a case study for this *** on the results,the optimum design of a wind cube is achieved,and an improvement in energy produced from the wind turbine with a wind cube will be compared with energy generated without a wind *** energy generated from a wind turbine with the optimized cube is more than 20 times that of a wind turbine without a wind cube for all cases studied.

关键词： Wind turbine wind cube gradient-based optimizer metaheuristics energy source

Semi-empirical model of solar plages

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Science China Mathematics 2001年第4期44卷 528-535页

作者：方成丁明德 J.-C.hénoux W.C.Livingston Department of Astronomy Nanjing University Nanjing China Observatoire de Paris DASOP-UMR8645 (CNRS) Meudon Cedex France National Solar Observatory Tucson USA

By use of the 2-m McMath-Pierce telescope at Kitt Peak, the high-quality spectra of a moderate-brightness plage near the center of solar disk were obtained. The data include seven spectral lines: hα, hβ, Call h and K lines and infrared triplet. Under the assumption of plane-parallel atmosphere, the hydrostatic, transfer and statistic equilibrium equations were solved iteratively and the semi-empirical model of the plage has been obtained. It can well reproduce the observed seven line profiles. The model has been compared with two existing plage models. Further improvement has also been discussed.

关键词： plage solar activity atmospheric model

Isovector pairing and particle-number fluctuation effects on the spectroscopic factors of one-proton stripping and one-neutron pick-up reactions in proton-rich nuclei

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Chinese Physics C 2018年第8期42卷 137-158页

作者： Y.Benbouzid N.h.Allal M.Fellah M.R.Oudih Laboratoire de Physique Theorique-Facultéde Physique-USThB BP32 El-Alia16111 Bab-Ezzouar-Alger-Algeria

Expressions of the spectroscopic factors（SFs） corresponding to one-particle transfer reactions have been established using a schematic *** expressions have been derived by taking into account the isovector neutron-proton（np） pairing correlations and a particle-number projection in the framework of the generalized SharpBCS（SBCS） *** proposed expressions of the projected wave-functions of odd-mass nuclei have been used for this *** formalism has first been tested using the single-particle energies of the schematic picketfence *** is shown that the np pairing and particle-number fluctuation effects are far from negligible and they depend on the pairing gap parameter *** behavior is not the same when the parent nuclei are even-even or *** dealing with the SFs corresponding to one-proton stripping and one-neutron pick-up reactions in proton-rich nuclei have then been established within the framework of the realistic Woods-Saxon *** is shown that the np pairing effect as well as the particle-number projection effect are important and thus have to be included in future calculations of the SF corresponding to these kinds of reactions.

关键词： neutron-proton pairing particle-number projection spectroscopic factor

Proximal gastric motility in critically ill patients with type 2 diabetes mellitus

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World Journal of Gastroenterology 2007年第2期13卷 270-275页

作者： Nam Q Nguyen Robert J Fraser Laura K Bryant Marianne Chapman Richard h holloway Department of Gastroenterology Hepatology and General Medicine Royal Adelaide Hospital South Australia Investigation and Procedures Unit Repatriation General Hospital South Australia Anaesthesia and Intensive Care Royal Adelaide Hospital South Australia

AIM： To investigate the proximal gastric motor response to duodenal nutrients in critically ill patients with longstanding type 2 diabetes ***： Proximal gastric motility was assessed （using a barostat） in 10 critically ill patients with type 2 diabetes mellitus （59±3 years） during two 60-min duodenal infusions of Ensure （1 and 2 kcal/min）, in random order, separated by 2h fasting. Data were compared with 15 non-diabetic critically ill patients （48 ± 5 years） and 10 healthy volunteers （28 ±3 years）. RESULTS： Baseline proximal gastric volumes were similar between the three groups. In diabetic patients, proximal gastric relaxation during I kcal/min nutrient infusion was similar to non-diabetic patients and healthy controls. In contrast, relaxation during 2 kcal/ min infusion was initially reduced in diabetic patients （P 〈 0.05） but increased to a level similar to healthy humans, unlike non-diabetic patients where relaxation was impaired throughout the infusion. Duodenal nutrient stimulation reduced the fundic wave frequency in a dose-dependent fashion in both the critically ill diabetic patients and healthy subjects, but not in critically ill patients without diabetes. Fundic wave frequency in diabetic patients and healthy subjects was greater than in non-diabetic ***： In patients with diabetes mellitus, proximal gastric motility is less disturbed than nondiabetic patients during critical illness, suggesting that these patients may not be at greater risk of delayed gastric emptying.

关键词： Proximal gastric function Diabetes mellitus type 2 Critical illness Enteral nutrition