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An assessment of steady-state conditions in single slug horizontal pneumatic conveying

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Particuology 2021年第5期19卷 187-195页

作者： A.Lavrinec O.Orozovic h.Rajabnia K.Williams M.G.Jones G.E.Klinzing Centre for Bulk Solids and Particulate Technologies The University of NewcastleNSW 2308Australia Department of Chemical and Petroleum Engineering The University of PittsburghPA 15261USA

This study used a 3D coupled CFD–DEM model to assess how slugs tend towards steady state in single slug horizontal pneumatic *** slug length,inlet velocity and initial stationary layer fractions were systematically varied for a total of 72 *** made observation that slugs tend towards a steady state was confirmed via a theoretical *** derivation shows that slugs move towards their steady state lengths *** allowed for a calculation of a characteristic time scale which is a measure of how quickly a slug tends towards the steady *** theoretical estimate which is a function of slug porosity,steady length,velocity and stationary layer fraction has good agreement with simulated results.A link between steady slug length and solids loading ratio was also shown.

关键词： Pneumatic conveying Dense phase Slug flow Steady state

RESEARCh ON ThE ESTIMATE OF SAFETY AND TOXICITY OF P-NITROPhENOL SODIUM WIThA PhYSIOLOGICALLY BASED PhARMACOKINETICS MODEL

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Chinese Medical Sciences Journal 1997年第1期12卷 32-36页

作者：高强 N.Kurihara h.Yanagisawa O.Wada Department of hygiene and Preventive Medicine Faculty of Medicine University of Tokyo.

The safety and toxicity of chemicals given first to animals and finally to humans are generally estimated with a method of safe coefficient, which is scientifically a way lack of grounds. To make a change of the old method, we designed a Physiologically Based Pharmacokinetics Medel for the estimate of safety and toxicity of chemicais. As an example,p-nitrophenol sodium (PNP-Na) is used in the research work. Studies of the PNP-Na pharmacokinetics in bodies of rat as well as humans are made, and possibilities of making use of the Model in the estimate of safety and toxicity of chemicals are discussed.

关键词： physiologically based pharmacokinetics model (PBPK ) p-nitrophenol sodium (PNP-Na) estimation of safety of chemical

Prospects of huygens’ Metasurfaces for Antenna Applications

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Engineering 2022年第4期8卷 21-26页

作者： George V.Eleftheriades Minseok Kim Vasileios G.Ataloglou Ayman h.Dorrah Department of Electrical and Computer Engineering University of TorontoTorontoON M5S 3G8Canada

*** In recent years,there has been an intense research effort by the international community in the field of“artificial”electromagnetic materials,or“metamaterials.”Metamaterials are engineered structures that induce a tailored arrangement of magnetic and electric dipole moments when excited by an incident electromagnetic *** certain conditions,such as when the comprising unit cells are sub-wavelength,metamaterials can be homogenized and described in terms of macroscopic constitutive parameters such as permeability,permittivity,and refractive index.A summary of the early work on“artificial dielectrics”can be found in Ref.[1].In the over 20-year-old field of metamaterials,the desired macroscopic parameters correspond to extreme properties such as negative permittivity,negative permeability,and a negative refractive *** the most recognized metamaterial is that which realizes a negative refractive index,originally demonstrated at microwaves and based on a unit cellmade out of a split-ring resonator and a wire[2].In the engineering community,a transmission-line approach was developed for implementing metamaterials with significant advantages,such as reduced transmission losses and wider operating bandwidths[3,4].

关键词： refractive arrangement artificial

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迭代均衡系统中的一种SNR估计方法

电子与信息学报 2008年第4期30卷 836-839页

作者：李强 W h Mow 李少谦电子科技大学通信学院抗干扰移动通信国家重点实验室成都610054 香港科技大学电子与电机工程系中国香港

该文首先分析了最大后敛概率(Maximum A posterior Probability,MAP)迭代均衡及其简化算法Max-Log- MAP(MLM)、缩放软信息的Max-Log-MAP算法(Scaled Max-Log-MAP,SMLM)对SNR估计误差的敏感性问题,然后利用SMLM算法对SNR估计误差不敏感的特性,提出了一种基于SMLM的软输出信息估计信道SNR的方法。最后,利用该算法,还提出了一种新的迭代均衡算法,并研究了其性能,结果表明该算法不仅不需要任何导引符号开销,还能获得非常接近具有理想的SNR的MAP算法的误码性能。

关键词：缩放Max-Log-MAP算法软输出信息 SNR估计迭代均衡

Molluscicidal effect of green synthesized silver nanoparticles using Azadirachta indica on Biomphalaria alexandrina snails and Schistosoma mansoni cercariae

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Asian Pacific Journal of Tropical Biomedicine 2023年第1期13卷 35-44页

作者： Salwa S.Younis Iman F.Abou-El-Naga Khaled h.Radwan Medical Parasitology Department Faculty of MedicineAlexandria UniversityAlexandriaEgypt Agriculture Genetic Engineering Research Institute CairoEgypt

Objective:To assess the molluscicidal effect of the eco-friendly green synthesized neem silver nanoparticles(neem-Ag NPs)against Biomphalaria alexandrina,the snail intermediate host for Schistosoma mansoni,and their cercaricidal ***:Methanol extracts from neem fruits were used for green synthesis of neem-Ag *** neem-Ag NPs were characterized using UV-visible absorption spectra,dynamic laser light scattering technique,and transmission electron *** potential molluscicidal effect against adult and juvenile Biomphalaria alexandrina and the effect of the sub-lethal concentration on hatching of snail eggs and Schistosoma mansoni cercariae were ***:The surface plasmon resonance of neem-Ag NPs showed a sharp absorption peak atλ_(max)=518 nm together with multiple *** hydrodynamic diameter was(77.15±34.53)nm,the polydispersity index(0.338±0.000)and the zeta-potential-14.07 ***,transmission electron microscopy showed that the average size of the nanoparticles was(27±2)*** was evident and a light-colored capping layer could be seen coating the *** snails(LC_(50):0.83 ppm)were more susceptible to neem-Ag NPs than adults(LC_(50):1.07 ppm).In addition,neem-Ag NPs and neem at LC_(50)concentrations inhibited the egg-hatching of snails and showed cercaricidal activity in a time-dependent ***:Neem-Ag NPs have lethal activities against Biomphalaria alexandrina snails and their eggs,as well as Schistosoma mansoni ***,neem-Ag NPs could be a potential agent to control schistosomiasis.

关键词： Biomphalaria alexandrina Neem Schistosoma mansoni Azadirachta indica Silver nanoparticles Molluscicide

Fuzzy Ideals and Fuzzy Distributive Lattices

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模糊系统与数学 2011年第3期25卷 30-36页

作者： S. h. Dhanani Y. S. Pawar Department of Mathematics K. I. T. 's College of Engineering Kolhapur 416003 India Department of Mathematics Shivaji University Kolhapur 416003India

Our main objective is to study properties of a fuzzy ideals(fuzzy dual ideals).A study of special types of fuzzy ideals(fuzzy dual ideals) is also *** properties of a fuzzy ideals(fuzzy dual ideals) are *** of a fuzzy lattice homomorphism are *** ideal lattice of a fuzzy lattice is defined and *** results in fuzzy distributive lattice are proved.

关键词： Fuzzy Lattice Fuzzy Ideal Fuzzy Convex Lattice Fuzzy Lattice homomorphism Fuzzy Distributive Lattice

Chemometric Amylose Modeling and Sample Selection for Global Calibration Using Artificial Neural Networks

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食品科学 2008年第8期29卷 118-124页

作者： ShIMIZU N OKADOME h WADA D KIMURA T OhTSUBO K Graduate School of Life and Environmental Sciences University of Tsukuba Ibaraki 305-8572 Japan National Food Research Institute Incorporated Administrative Agency Ibaraki 305-8642 Japan Graduate School of Agriculture Hokkaido University Hokkaido 060-8589 Japan

Chemometric amylose modeling for global calibration,using whole grain near infrared transmittance spectra and sample selection,was used in an artificial neural network(ANN) ,to assess the global and local models generated,based on samples of newly bred Indica,Japonica and rice. Global sample sets had a wide range of sample variation for amylose content(0 to 25.9%) . The local sample set,Japonica sample,had relatively low amylose content and a narrow sample variation(amylose;12.3% to 21.0%) . For sample selection the CENTER algorithm was applied to generate calibration,validation and stop sample sets. Spectral preprocessing was found to reduce the optimum number of partial least squares(PLS) components for amylose content and thus enhance the robustness of the local calibration. The best model was found to be an ANN global calibration with spectral preprocessing;the next was a PLS global calibration using standard spectra. These results pose the question whether an ANN algorithm with spectral preprocessing could be developed for global and local calibration models or whether PLS without spectral preprocessing should be developed for global calibration models. We suggest that global calibration models incorporating an ANN may be used as a universal calibration model.

关键词：直链淀粉人工神经网络分析方法食品标准

Thermomechanical treatment of austempered ductile iron

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China Foundry 2007年第4期4卷 304-309页

作者： A.A.Nofal h.Nasr El-din M.M.Ibrahim Central Metallurgical Research and Development Institute (CMRDI)CairoEgypt

The production of lightweight ferrous castings with increased strength properties became unavoidable facing the serious challenge of lighter aluminum and magnesium castings. The relatively new ferrous casting alloy ADI offers promising strength prospects, and the thermo-mechanical treatment of ductile iron may suggest a new route for production of thin-wall products. This work aims at studying the influence of thermomechanical treatment, either by ausforming just after quenching and before the onset of austempering reaction or by cold rolling after austempering. In the first part of this work, ausforming of ADI up to 25% reduction in height during a rolling operation was found to add a mechanical processing component compared to the conventional ADI heat treatment, thus increasing the rate of ausferrite formation and leading to a much finer and more homogeneous ausferrite product. The kinetics of ausferrite formation was studied using both metallographic as well as XRD-techniques. The effect of ausforming on the strength was quite dramatic （up to 70% and 50% increase in the yield and ultimate strength respectively）. A mechanism involving both a refined microstructural scale and an elevated dislocation density was suggested. Nickel is added to ADI to increase hardenability of thick section castings, while ausforming to higher degrees of deformation is necessary to alleviate the deleterious effect of alloy segregation on ductility. In the second part of this work, the influence of cold rolling （CR） on the mechanical properties and structural characteristics of ADI was investigated. The variation in properties was related to the amount of retained austenite （7~） and its mechanically induced transformation. In the course of tensile deformation of ADI, transformation induced plasticity （TRIP） takes place, indicated by the increase of the instantaneous value of strain-hardening exponent with tensile strain. The amount of retained austenite was found to decrease due to

关键词： ADI ausforming cold-rolling thermomechanical treatment transformation induced plasticity

Metabolic abnormalities play a crucial role in non-obese people suffering from non-alcoholic fatty liver disease(NAFLD)

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hepatobiliary Surgery and Nutrition 2022年第2期11卷 333-334页

作者： Qing Ye Takanori Ito Linda henry Mindie h.Nguyen Department of hepatology of The Third Central hospital of Tianjin TianjinChina Department of Gastroenterology and hepatology Nagoya University Graduate School of MedicineNagoyaJapan Division of Gastroenterology and hepatology Stanford University Medical CenterPalo AltoCAUSA

We read the article entitled“The presence of NAFLD in nonobese subjects increased the risk of metabolic abnormalities than obese subjects without NAFLD:A population-based cross-sectional study”by hu et al.(1),which was published in the latest issue of hepatobiliary Surgery Nutrition,with great *** the authors described,due to rapid urbanization and sedentary lifestyles,the prevalence of non-alcoholic fatty liver disease(NAFLD)has *** this population-based,cross-sectional health survey study,in which the data were obtained from community health centers,the investigators reported that the prevalence of NAFLD in Shanghai,China grew from 15%in 2005 to 32.7%in 2017(1).To gain a better understanding of the prevalence of metabolic features in relation to NAFLD status,gender,and age,the authors quantified the risks of having different metabolic conditions between the following 4 groups:(I)the non-obese NAFLD group;(II)the non-obese non-NAFLD group;(III)the obese non-NAFLD group;and(IV)the obese NAFLD group(1).

关键词： NAFLD Surgery obese