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Weak-Coupling Theory for Low-Frequency Periodically Driven Two-Level Systems

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Communications in Theoretical Physics 2008年第8期50卷 493-496页

作者： CHEN Ai-Xi HUANG ke-Lin wang zhi-Ping Department of Applied Physics East China Jiaotong University Nanchang 330013 China

We generalize the Wu-Yang strong-coupling theory to solve analytically periodically driven two-level systems in the weak-coupling and low-frequency regimes for single- and multi-period periodic driving of continuous-wave-type and pulse-type including ultrashort pulses of a few *** also derive a general formula of the AC Stark shift suitable for such diverse situations.

关键词： two-level system weak-coupling ultrashort pulse

A new aryl glycoside from Euphorbia helioscopia L.

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Chinese Chemical Letters 2009年第2期20卷 181-183页

作者： Wei Sheng Feng Li Gao Xiao ke Zheng Yan zhi wang Henan College of Traditional Chinese Medicine Zhengzhou 450008 China

A new aryl glycoside, 3″-O-galloyl-benzyl-O-α-L-rharnnopyranosyl-（1 → 6）-β-D-glucopyranoside, was isolated from Euphorbia helioscopia L., and its structure was elucidated on the basis of various spectroscopic da... 详细信息

关键词： Euphorbia Euphorbia helioscopia L. Aryl glycoside

A highly selective turn-on colorimetric and luminescence sensor based on a triphenylamine-appended ruthenium(Ⅱ) dye for detecting mercury ion

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Chinese Chemical Letters 2015年第5期26卷 580-584页

作者： Su-Hua Fan Jie Shen Hai Wu ke-zhi wang An-Guo Zhang School of Chemical and Materials Engineering Fuyang Normal College College of Chemistry Beijing Normal University College of Materials and Chemistry & Chemical Engineering Chengdu University of Technology

A dual colorimetric and luminescent sensor based on a heteroleptic ruthenium dye [Ru（Hipdpa）（Hdcb- py）（NCS）2]^-.0.5H^＋ 0.5[N（C4H9）4]＋ Ru（Hipdpa） {where Hdcbpy = monodeprotonted-4,4＇-dicarboxy-2,2＇- bipyridine and Hipdpa = 4-（1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl）-N,N-diphenylaniline} for selective detection of Hg2. is presented. The results of spectrophotometric titrations revealed an evident luminescence intensity enhancement （I/Io = 11 ） and a considerable blue shift in visible absorption and luminescence maxima with the addition of rig2.. The sensitive response of the optical sensor on Hg^2＋ was attributed to the binding of the electron-deficient Hg^2＋ to the electron-rich sulfur atom of the thiocyanate （NCS） ligand in the Ru（Hipdpa）, which led to an increase in the energy gap between the highest occupied molecular orbital （HOMO） and the lowest unoccupied molecular orbital （LUMO）. Accordingly, the blue shift in the absorption spectrum of Ru（Hipdpa） due to the binding of Hg2. was obtained. Ru（Hipdpa） was found to have decreased Hg2~ detection limit and improved linear region as compared to di（tetrabutylammonium） cis-bis（isothiocyanato）bis（2,2＇-bipyridine-4-carboxylic acid-4＇- carboxylate）ruthenium（ll） N719. Moreover, a dramatic color change from pink to yellow was observed, which allowed simple monitoring of Hg^2＋ by either naked eyes or a simple colorimetric reader. Therefore, the proposed sensor can provide potential applications for Hg2＊ detection.

关键词： Ruthenium dye Mercury Colorimetric sensor Luminescence sensor

A new phenylethanoid glycoside from Rabdosia lophanthoides(Buch.-*** ***) Hara.

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Chinese Chemical Letters 2009年第4期20卷 453-455页

作者： Wei Sheng Feng Xin Yu Zang Xiao ke Zheng Yan zhi wang Henan College of Traditional Chinese Medicine Zhengzhou 450008 China

A new phenylethanoid glycoside, 3-hydroxy-4-methoxy-β-phenylethoxy-O-α-L-rhamnopyranosyl-（1 → 3）-2-O-acetyl-O-β-D- glucopyranoside, named lophanthoside A, was isolated from Rabdosia lophanthoides （Buch.-*** ***... 详细信息

关键词： Rabdosia lophanthoides Lophanthoside A Phenylethanoid glycoside

Visceral response to acute retrograde gastric electrical stimulation in healthy human

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World Journal of Gastroenterology 2005年第29期11卷 4541-4546页

作者： Shu-Kun Yao Mei-Yun ke zhi-Feng wang Da-Bo Xu Yan-Li Zhang Department of Gastroenterology Peking Union Medical College Hospital Beijing 100730 China

AIM: To investigate the visceral response to acute retrograde gastric electrical stimulation (RGES) in healthy humans and to derive optimal parameters for treatment of patients with ***: RGES with a series of effective parameters were performed via a bipolar mucosal electrode implanted along the great curvature 5 cm above pylorus of stomach in 12 healthy human subjects. Symptoms associated with dyspepsia and other discomfort were observed and graded during RGES at different settings, including long pulse and pulse train. Gastric myoelectrical activity at baseline and during different settings of stimulation was recorded by a multi-channel ***: The gastric slow wave was entrained in all the subjects at the pacing parameter of 9 cpm in frequency, 500 ms in pulse width, and 5 mA in *** frequently appeared symptoms during stimulation were satiety, bloating, discomfort, pain, sting, and nausea. The total symptom score for each subject significantly increased as the amplitude or pulse width was adjusted to a higher scale in both long pulse and pulse train. There was a wide diversity of visceral responses to RGES among ***: Acute RGES can result in a series of symptoms associated with dyspepsia, which is beneficial to the treatment of obesity. Optimal parameter should be determined according to the individual sensitivity to electrical stimulation.

关键词： Visceral response Retrograde gastric electrical stimulation Symptom Obesity

Energy-efficient trajectory planning for amulti-UAV-assisted mobile edge computing system

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Frontiers of Information Technology & Electronic Engineering 2020年第12期21卷 1713-1725页

作者： Pei-qiu HUANG Yong wang ke-zhi wang School of Automation Central South UniversityChangsha 410083China Department of Computer and Information Sciences Northumbria UniversityNewcastle NE 18STUK

We study a mobile edge computing system assisted by multiple unmanned aerial vehicles(UAVs),where the UAVs act as edge servers to provide computing services for Internet of Things *** goal is to minimize the energy consumption of this system by planning the trajectories of *** problem is difficult to address because when planning the trajectories,we need to consider not only the order of stop points(SPs),but also their deployment(including the number and locations)and the association between UAVs and *** tackle this problem,we present an energy-efficient trajectory planning algorithm(TPA)which comprises three *** the first phase,a differential evolution algorithm with a variable population size is adopted to update the number and locations of SPs at the same *** the second phase,the k-means clustering algorithm is employed to group the given SPs into a set of clusters,where the number of clusters is equal to th at of UAVs and each cluster contains all SPs visited by the same *** the third phase,to quickly generate the trajectories of UAVs,we propose a low-complexity greedy method to construct the order of SPs in each *** with other algorithms,the effectiveness of TPA is verified on a set of instances at different scales.

关键词： Multiple unmanned aerial vehicles Mobile edge computing Trajectory planning Differential evolution k-means clustering algorithm Greedy method

Fast Fourier Transform-based Support Vector Machine for Prediction of G-protein Coupled Receptor Subfamilies

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Acta Biochimica et Biophysica Sinica 2005年第11期37卷 759-766页

作者： Yan-zhi GUO Meng-Long LI ke-Long wang zhi-Ning WEN Min-Chun LU Li-Xia LIU Lin JIANG College of Chemistry,Sichuan University,Chengdu 610064,China College of Chemistry Sichuan UniversityChengdu 610064 China

Although the sequence information on G-protein coupled receptors(GPCRs)continues togrow,many GPCRs remain orphaned(*** specificity unknown)or poorly characterized with littlestructural information available,so an automated and reliable method is badly needed to facilitate the identifi-cation of novel *** this study,a method of fast Fourier transform-based support vector machinehas been developed for predicting GPCR subfamilies according to protein’s *** classifyingClass B,C,D and F subfamilies,the method achieved an overall Matthew’s correlation coefficient andaccuracy of 0.95 and 93.3%,respectively,when evaluated using the jackknife *** method achieved anaccuracy of 100% on the Class B independent *** results show that this method can classify GPCRsubfamilies as well as their functional classification with high accuracy.A web server implementing theprediction is available at http://***/blast/Pred-GPCR.

关键词： G-protein coupled receptor subfamily fast Fourier transform support vector machine prediction

One-step preparation of modified photothermal-driven melamine foam with gradient wettability for oil-waterseparation

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Frontiers of Materials Science 2024年第3期18卷 71-82页

作者： Mengdan Jia Mei-Chen Lin Hai-Tao Ren Bing-Chiuan Shiu Ching-Wen Lou zhi-ke wang Li-Yan Liu Ting-Ting Li Innovation Platform of Intelligent and Energy-Saving Textiles School of Textile Science and EngineeringTiangongUniversityTianjin 300387China Tianjin and Ministry of Education key Laboratory for Advanced Textile Composite Materials Tiangong UniversityTianjin 300387China Department of Biomedical Engineering College of Biomedical EngineeringChina Medical UniversityTaichung 404333China College of Material and Chemical Engineering Minjiang UniversityFuzhou 350108China Department of Bioinformatics and Medical Engineering AsiaUniversityTaichung 413305China Department of Medical Research China Medical University HospitalChina Medical UniversityTaichung 404333China Advanced Medical Care and Protection Technology Research Center College of Textile and ClothingQingdaoUniversityQingdao 266071China Department of Textile and Clothing Shandong Vocational College of Science and TechnologyWeifang 261053China

The absorption of high-viscosity oil by traditional oil absorbing materials has always been a *** there is an urgent need to solve the problem of slow absorption of high-viscosity *** this work,an emulsion composed of polydimethylsiloxane(PDMS),carbon black(CB)and waterborne polyurethane(solid content 40%)was sprayed on the melamine foam(MF).After volatilization of organic solvents,the photothermal material CB was fixed on the MF framework,making it *** raising the temperature of the modified foam to accelerate the internal thermal movement of high-viscosity oil molecules around the foam,intermolecular forces are reduced,thereby accelerating the separation *** absorption capacity of this modified MF towards organic solvents and oil is up to 79 times its own *** addition,the mechanical properties of the modified foam are improved to a certain extent,more conducive to the continuous oil-water *** photothermal absorption material provides ideas for the rapid removal of high-viscosity oil,heavy oil,etc.

关键词： photothermal high-viscosity oil oil-water separation

Surface micro-arrays enhancing electromagnetic interference shielding of polydimethylsiloxane/multiwalled carbon nanotubes nanocomposites

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Nano Research 2025年第1期18卷 508-519页

作者： ke Jiang zhi Chen Ji Yu Chen Zheng Shan Huang Ming wang Chongqing key Laboratory of Soft-Matter Material Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China School of Mechanics Civil Engineering and ArchitecturesNorthwestern Polytechnical UniversityXi’an 710072China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China

Herein,the electromagnetic shielding performance of surface concave-convex(SC)and zig-zag micro-arrays was studied by using a simulation prediction and a three-dimensional(3D)printing custom ***,surface stripe concaveconvex(SSC)and surface cylindrical concave-convex(SCC)micro-arrays with or without zig-zag micro-arrays are designed,and their shielding performance is simulated in multi-bands(C-,X-band).The multiwalled carbon nanotubes/polydimethylsiloxane composites(MWCNT/PDMS)with different SC structures and different electrical conductivity are molded in acrylonitrile-butadiene-styrene copolymer(ABS)molds which are printed by a 3D *** results show that the electromagnetic interference shielding effectiveness(EMI SE)of the samples can be enhanced by constructing the SC micro-arrays with zig-zag micro-arrays,and improving with the increase of conductivity and *** addition,the shielding mechanism of the SC-MWCNT/PDMS composites is investigated and discussed by an electromagnetic simulation.

关键词： surface micro-arrays electrical properties electromagnetic interference(EMI)shielding three-dimensional(3D)printing