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Prediction of operational parameters effect on coal flotation using artificial neural network

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Journal of University of Science and Technology Beijing 2008年第5期15卷 528-533页

作者： E. Jorjani sh. Mesroghli S. Chehreh Chelgani Department of Mining Engineering Science and Research BranchIslamic Azad University

Artificial neural network procedures were used to predict the combustible value （i.e. 100-Ash） and combustible recovery of coal flotation concentrate in different operational conditions. The pulp density,pH,rotation rate,coal particle size,dosage of collector,frother and conditioner were used as inputs to the network. Feed-forward artificial neural networks with 5-30-2-1 and 7-10-3-1 arrangements were capable to estimate the combustible value and combustible recovery of coal flotation concentrate respectively as the outputs. Quite satisfactory correlations of 1 and 0.91 in training and testing stages for combustible value and of 1 and 0.95 in training and testing stages for combustible recovery prediction were achieved. The proposed neural network models can be used to determine the most advantageous operational conditions for the expected concentrate assay and recovery in the coal flotation process.

关键词： coal flotation operational parameters artificial neural networks combustible recovery

Effect of surface nanocrystallization and PPEC time on complex nanocrystalline hard layer fabricated by plasma electrolysis

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Transactions of Nonferrous Metals Society of China 2010年第3期20卷 425-431页

作者： M.ALIOFKHAZRAEI sh.AHANGAR ANI A.SABOUR ROUHAGHDAM Department of Materials Engineering Faculty of EngineeringTarbiat Modares University Department of Advanced Materials and Renewable Energies Iranian Research Organization for Science and Technology(IROST)

Size distribution of nano-carbides produced by duplex treatments of surface nanocrystallization(by surface severe plastic deformation) and plasma electrolytic carburizing on CP-Ti was *** and kurtosis of Gussian shape distribution curves were studied and the effect of time was *** usage of longer time is more suitable for achieving less size of complex *** roughness of treated samples was *** is observed that there is an optimum level for time on surface roughness increasing(difference between two measured data).

关键词： surface nanocrystallization hard layer roughness CP-Ti

Dynamical modeling and controllability analysis of a flexible needle in soft tissue

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International Journal of Modeling, Simulation, and Scientific Computing 2014年第2期5卷 130-157页

作者： Arefeh Boroomand Mahdi Tavakoli ron Sloboda Nawaid Usmani Department of Electrical and Computer Engineering University of Alberta EdmontonABCanada T6G 2V4 Department of Medical Physics Cross Cancer Institute 11560 University AvenueEdmontonABCanada T6G 1Z2 Department of Radiation Oncology Cross Cancer Institute 11560 University AvenueEdmontonABCanada T6G 1Z2

This paper is concerned with deriving a dynamic model of a moderately flexible needle inserted into soft tissue,where the model’s output is the needle *** main advantages of the proposed dynamic modeling approach are that the presented model structure involves parameters that are all measurable or identifiable by simple exper-iments and that it considers the same inputs that are currently used in the clinical practice of manual needle *** manual needle insertion suffers from the fact that flexible needles bend during insertion and their trajectories often vary from those planned,resulting in positioning *** of needle insertion accuracy via robot-assisted needle steering has received significant attention in the past decade.A common assumption in previous research has been that the needle behavior during insertion can be adequately described by static models relating the needle’s forces and torques to its *** closed-loop control purposes,however,a dynamic model of the flexible needle in soft tissue is *** this paper,we propose a Lagrangian-based dynamic model for the coupled needle/tissue system,and analyze the response of the dynamic ***(controllability)analysis is also performed,which is only possible with a dynamic *** proposed dynamic model can serve as a cornerstone of future research into designing dynamics-based control strategies for closed-loop needle steering in soft tissue aimed at minimizing position error.

关键词： Dynamic modeling controllability flexible needle

Isolating sorbicilin-producing fungi from Darband cave and evaluating the sorbicilin biomedical applications

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Studies in Fungi 2020年第1期5卷 103-112页

作者： Zareshahi F Abolmaali sh Darvish Alipour Astaneh sh Asghari A Dep.for Biotechnology Faculty of BiotechnologySemnan UniversityIran Dep.for Biology Faculty of Basic ScienceSemnan UniversityIran Dep.for Chemistry Faculty of ChemistrySemnan UniversityIran

To evaluate the potential of fungi from Darband cave,Semnan,Iran,for valuable antibacterial and anticancer agents,molecular screening was done against polyketides(PKS);the source for numerous diverse secondary *** were isolated from soil and *** antibacterial activity of the isolates was studied against indicator bacteria by well diffusion agar method,and analyzed by PCR for PKS *** positive strains were compared for toxicity against indicators and A549 *** of antibacterial agents was investigated in 26 days followed by partial purification of the *** layer chromatography(TLC)and High Performance Liquid Chromatography(HPLC)analyses were done to reveal the nature of the toxin(s).The isolates exhibited the antimicrobial activity against Staphylococcus aureus,Bacillus cereus,and Bacillus *** isolates selected for further studies based on the yellow culture broth,the presence of PKS,and antibacterial *** strains were identified as Penicillium chrysogenum using 18s rDNA *** yellow culture,87%identity of the PKS 12/PKS 13,the results of HPLC,and the toxic effects against certain bacteria and A549 cells confirmed the production of the sorbicillinoid in *** strains;DDFCC170 and *** partially-purified antibacterial-anticancer agents named as AnBa170 and AnBa186 exhibited bactericide effect on *** and *** compounds killed A549 cells with an IC_(50) value of 0.25μM and 0.22μM ***170 and AnBa186 are attractive for pharmaceutical *** on the literature,the cytotoxicity of sorbicillinoids against tumor cells and bacteria is related to their oxidation capacity.

关键词： Antibacterial Penicillium chrysogenum PKS Sorbicillin

Preliminary study on search for genes for early embryonic development in goldfish by mRNA differential display

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Chinese Science Bulletin 1997年第13期42卷 1133-1135页

作者： Li, sh Han, W Ma, HF Institute of Developmental Biology Chinese Academy of Sciences Beijing 100080 China

MATERNAL RNAs stored in eggs play an essential role during the initial stage of embryonic de-velopment in animals and they are degraded as the development proceeds. In some animals (e.g. fish and amphibian), zygotic genes begin to transcribe new mRNA only when the embryosdevelop to about midblastula stage. This degradation of maternal RNA and synthesis of

关键词： mRNA differential display early embryonic development gene goldfish.

Seroepidemiology of Helicobacter pylori infection among asymptomatic Chinese children

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World Journal of Gastroenterology 2000年第5期6卷 759-761页

作者： Xu CD Chen SN Jiang sh Xu JY shanghai Second Mil Med Univ Ruijin Hosp Dept Pediat Shanghai 200025 Peoples R China

INTRODUCTIONIncreasing data has demonstrated that Helicobacterpylori(***),a spiral gram negativebacterium,colonized in human stomach,can causetype B gastritis,is strongly associated withgastric and duodenal ulceration,and has beenimplicated in the causation of gastric carcinomaand mucosa-associated lymphoid tissue(MALT)*** has been reported that there

关键词： Helicobacter infection/infancy children Helicobacter pylori seroepidemiology gastritis stomach neoplasms gastric mucosa family

Synthesis of Novel Molecular Receptors from Estradiol Dimer

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Chinese Chemical Letters 1997年第6期8卷 483-486页

作者： Li, DH shi, DC Chen, sh Zhao, HM SICHUAN UNIV FAC SCIDEPT CHEMCHENGDU 610064PEOPLES R CHINA

A novel type of estrogen-based receptor has been synthesized. These receptor compounds 3a-d have been characterized by mass spectra, H-1 NMR spectra, IR spectra and elemental analyses.

关键词： EI MS IR Synthesis of Novel Molecular Receptors from Estradiol Dimer KBr HNMR

Effects on the Surface Passive Film of Carbon Anode on Cell Behavior

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Chinese Chemical Letters 1997年第2期8卷 175-176页

作者： Ma, sh Li, J Jing, XB Wang, FS ACAD SINICA CHANGCHUN INST APPL CHEMPOLYMER PHYS LABCHANGCHUN 130022PEOPLES R CHINA

The properties of the films formed in the electrolyte of PC/DME LiClO4 on two kinds of carbon materials were examined by cathodic polarization measurements. The result suggested that the films on both carbon electrode... 详细信息

关键词： DME Effects on the Surface Passive Film of Carbon Anode on Cell Behavior Cell

A New Ursene Type Triterpenoid from Crepis napifera

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Chinese Chemical Letters 2000年第8期11卷 711-712页

作者： Wu, sh Luo, XD Ma, YB Wu, DG Chinese Acad Sci Kunming Inst Bot Lab Phytochem Kunming 650204 Peoples R China

A new triterpenoid, urs-20-en-3 beta-acetoxy-22 alpha-ol, and three known compounds 3 beta-acetoxy-amyrin, 3 beta-acetoxy-lupeol, lupeol were isolated from the leaves of Crepis napifera (Franch.) Babe. Their structure... 详细信息

关键词： Crepis napifera (Franch.) Babc. Compositae triterpenoid urs-20-en-3 beta-acetoxy-22 alpha-ol 3 beta-acetoxy-amyrin 3 beta-acetoxy-lupeol lupeol