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Plasma Science and Technology 2020年第2期22卷 87-94页

作者： Qunxia ZHANG cao fang Zhu CHEN Qing HUANG Key Laboratory of High Magnetic Field and Ion Beam Physical Biology Institute of Technical Biology and Agriculture EngineeringHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China Anhui Jianzhu University Hefei 230601People's Republic of China

Fungal infection of human nails,or onychomycosis,affects 10%of the world's adult population,but current therapies have various *** this work,we employed a self-made low-temperature plasma(LTP)device,namely,an atmospheric-pressure plasma jet(APPJ)device to treat the nails infected with Trichophyton rubrum(***)with the aid of persulfate *** found that persulfate solution had a promoting effect on plasma treatment of *** addition of sodium persulfate,the APPJ therapy could cure onychomycosis after several times of *** such,this work has demonstrated a novel and effective approach which makes good use of LTP technique in the treatment of onychomycosis.

关键词： low-temperature plasma(LTP) persulfate onychomycosis Trichophyton rubrum(T rubrum)

Effective and selective adsorption of uranyl ions by porous polyethylenimine-functionalized carboxylated chitosan/oxidized activated charcoal composite

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Frontiers of Chemical Science and Engineering 2022年第3期16卷 408-419页

作者： Juan Shen fang cao Siqi Liu Congjun Wang Rigui Chen Ke Chen School of Materials Science and Engineering Southwest University of Science and TechnologyMianyang621010China State Key Laboratory of Environmental-friendly Energy Materials Southwest University of Science and TechnologyMianyang621010China

Composite materials have elicited much interest because of their superior performance in the removal of toxic and radioactive uranyl ions from aqueous *** polyethyleneimine as a functional group,carboxylated chitosan as a matrix,and oxidizing activated carbon as a nanofiller,this study synthesized a novel environment-friendly polyethylenimine-functionalized carboxylated chitosan/oxidized activated charcoal(PCO)biocomposite with a unique three-dimensional porous *** was synthesized through an easy chemical cross-linking *** characterization certified the formation of the unique three-dimensional porous *** obtained PCO was used to remove uranyl ions from an aqueous solution,demonstrating the maximum adsorption capacity of 450 mg·g^(−1).The adsorption capacity of PCO decreased by less than 7.51%after five adsorption-desorption *** exhibited good adsorption selectivity(K_(d)=3.45×10^(4) mL·g^(−1))for uranyl *** adsorption mechanism of PCO was also *** material showed good potential for application in the treatment of wastewater containing uranyl ions.

关键词： polyethylenimine carboxylated chitosan activated charcoal uranyl ion adsorption

Microstructure and Corrosion Behavior of the As-Extruded Mg-4Zn-2Gd-0.5Ca Alloy

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Acta Metallurgica Sinica(English Letters) 2020年第3期33卷 362-374页

作者： Hao-Yi Niu fang-fang cao Kun-Kun Deng Kai-Bo Nie Jin-Wen Kang Hong-Wei Wang Shanxi Key Laboratory of Advanced Magnesium-Based Materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China

In order to study the corrosion resistance of extruded magnesium alloys,the Mg-4Zn-2Gd-0.5Ca alloy was extruded at the speed of 0.01-0.1 mm/s with the temperature of 280-360℃in present *** extrusion results show that the volume fraction of precipitates(Vpre),VDRX(the dynamic recrystallization rate) and the average size of DRXed grain(dDRX) decrease with the decrease in extrusion speed,and the corrosion rate of the alloy also shows a downward *** the contrary,the values of Vpre,VDRX and dDRX increase with the increase in extrusion temperature,and the corrosion resistance of Mg-4Zn-2Gd-0.5Ca alloy *** the extrusion speed is 0.01 mm/s and the extrusion temperature is 280℃,the alloy has the best corrosion *** corrosion of extruded Mg-4Zn-2Gd-0.5Ca alloy occurs preferentially on the magnesium matrix around W and I phases in the DRXed *** the further corrosion,the corrosion continues to spread along the phase,and the corrosion area gradually *** corrosion plays a leading role in the corrosion ***,there are a large number of basal plane textures in the unDRXed region,which is conducive to improving the corrosion resistance of magnesium *** addition,the decrease in grain size also makes the corrosion of magnesium alloy more uniform.

关键词： Mg-4Zn-2Gd-0.5Ca alloy Extrusion EIS(electrochemical impedance spectroscopy) Weight loss Corrosion resistance

Study on Applying Optimal Path to Land Valuation

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Geo-Spatial Information Science 2006年第1期9卷 49-54页

作者： WANG Wei DONG Fei SHI Lite cao fang State Key Laboratory of Information Engeering in Surveying. Mapping and Remote Sensing. Wuhan University 129 Luoyu Road Wuhan 430079 China

As an important role in the urban land price system, the basic land price appraisal directs and refleets all kinds of land price in the real estate market. Using geographic information systems （GIS） with algo rithms and powerful analysis functions to valuate land will improve the rationality and convenience of land valu- ation. The objective of the study on basic land price using the optimal path algorithm is to decrease the man made error, enhance automatization, avoid make inconvenience by roadblock object.

关键词： GIS optimal path shortest path land price appraisal land valuation basic land price

Seasonal variation and sources of low molecular weight organic acids in precipitation in the rural area of Anshun

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Chinese Science Bulletin 2011年第10期56卷 1005-1010页

作者： ZHANG YanLin LEE XinQing cao fang HUANG DaiKuan State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

Low molecular weight (LMW) organic acids are important and ubiquitous chemical constituents in the atmosphere.A comprehensive study of the chemical composition of precipitation was carried out from June 2007 to June 2008 at a rural site in Anshun,in the west of Guizhou Province,*** this period,118 rainwater samples were collected and the main LMW carboxylic acids were determined using ion *** average pH of rainwater was 4.89 which is a typical acidic *** most abundant carboxylic acids were formic acid (volume weight mean concentration:8.77 μmol L-1) and acetic acid (6.90 μmol L-1),followed by oxalic acid (2.05 μmol L-1).The seasonal variation of concentrations and wet deposition fluxes of organic acids indicated that direct vegetation emissions were the main sources of the organic *** concentrations were observed in winter and were ascribed to the low winter rainfall and the contribution of other air pollution sources northeast of the study *** ratio of formic and acetic acids in the precipitation ([F/A] T) was proposed as an indicator of pollution *** suggested that the pollution resulted from direct emissions from natural or anthropogenic *** with acid precipitation in other urban and rural areas in Guizhou showed that there was a decreasing contribution of LMW organic acids to free acidity and all anions in rainwater from urban to remote rural ***,it is necessary to control emissions of organic acids to reduce the frequency of acid rain,especially in rural and remote areas.

关键词：低分子量有机酸农村地区季节变化降水安顺平均浓度化学成分污染来源

Reversible Data Hiding in Encrypted Image Based on Block Classification Permutation

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Computers, Materials & Continua 2019年第4期59卷 119-133页

作者： Qun Mo Heng Yao fang cao Zheng Chang Chuan Qin School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai200093China College of Information Engineering Shanghai Maritime UniversityShanghai201306China ICD-LOSI UMR CNRS 6281University of Technology of Troyes10000 TroyesFrance

Recently,reversible data hiding in encrypted image(RDHEI)has attracted extensive attention,which can be used in secure cloud computing and privacy protection *** this paper,a novel RDHEI scheme based on block classification and permutation is *** owner first divides original image into non-overlapping blocks and then set a threshold to classify these blocks into smooth and non-smooth blocks *** block classification,content owner utilizes a specific encryption method,including stream cipher encryption and block permutation to protect image content *** the encrypted image,data hider embeds additional secret information in the most significant bits(MSB)of the encrypted pixels in smooth blocks and the final marked image can be *** the receiver side,secret data will be extracted correctly with data-hiding *** receiver only has encryption key,after stream cipher decryption,block scrambling decryption and MSB error prediction with threshold,decrypted image will be *** data hiding key and encryption key are both obtained,receiver can find the smooth and non-smooth blocks correctly and MSB in smooth blocks will be predicted correctly,hence,receiver can recover marked image *** results demonstrate that our scheme can achieve better rate-distortion performance than some of state-of-the-art schemes.

关键词： Reversible data hiding image encryption image recovery

Hole transport and phonon scattering in epitaxial PbSe films

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第1期9卷 137-142页

作者： Jian-xiao SI Hui-zhen WU Tian-ning XU Chun-fang cao Department of Physics Zhejiang University Hangzhou 310027 China College of Physics and Mathematics Zhejiang Normal University Jinhua 321004 China

The combined characterizations of mobility and phonon scattering spectra allow us to probe hole transport process in epitaxial PbSe crystalline films grown by molecular beam epitaxy (MBE). The measurements of Hall effect show p-type con- ductivity of PbSe epitaxial films. At 295 K, the PbSe samples display hole concentrations of (5～8)×1017 cm–3 with mobilities of about 300 cm2/(V·s), and at 77 K the hole mobility is as high as 3×103 cm2/(V·s). Five scattering mechanisms limiting hole mobilities are theoretically analyzed. The calculations and Raman scattering measurements show that, in the temperatures between 200 and 295 K, the scattering of polar optical phonon modes dominates the impact on the observed hole mobility in the epitaxial PbSe films. Raman spectra characterization observed strong optical phonon scatterings at high temperature in the PbSe epitaxial films, which is consistent with the result of the measured hole mobility.

关键词： Electrical properties of PbSe Mobility Scattering mechanism

Sedimentary nitrogen dynamics in a coastal reef area with relatively high nitrogen concentration

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Acta Oceanologica Sinica 2023年第4期42卷 33-40页

作者： Zhiming Ning Ronglin Xia Bin Yang cao fang Wei Jiang Guodong Song Guangxi Laboratory on the Study of Coral Reefs in the South China Sea School of Marine SciencesGuangxi UniversityNanning 530004China Guangxi Key Laboratory of Marine Environmental Change and Disaster in Beibu Gulf Beibu Gulf UniversityQinzhou 535011China Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of ChinaQingdao 266100China

The migration and transformation of nitrogen(N)in sediments play an important role in regulating the N concentration and nutrient structures in shallow ***,studies of sedimentary N dynamics are rarely focused on carbonate sediments,although these account for about 40%of the continental shelf ***,the regulation mechanisms of the N dynamics in the carbonate sands of coral reefs are not *** the coral reef area of Weizhou Island,which has a relatively high N concentration,as the research object,we conducted a series of flow-through reactor experiments to investigate the fluxes of different N forms at the interface of sediment and seawater and their regulation mechanism by environmental *** fluxes of dissolved inorganic and organic N(DIN and DON)at different stations were-0.39-0.12 mmol/(m^(2)·h) and-0.18-0.39 mmol/(m^(2)·h),***(0.11-0.25 mmol/(m^(2)·h) was closely coupled to nitrification,which was limited by the availability of organic matter and its degradation product(i.e.,NH_(4)^(+)).Thus,the excessive NO_(3)^(-) might be reduced to NH4+by dissimilatory nitrate reduction to ammonium,rather than to N_(2) by ***_(3)^(-) reduction peaked at intermediate advection rates(96 L/(m^(2)·h)) and flow path lengths(10 cm),but the release of DON also peaked at the same *** addition,climate warming would significantly affect sedimentary N dynamics at Weizhou *** results may help address the broader issue of the N cycle in coral reef eco systems under the dual pressure of climate warming and anthropogenic activities,and these results are beneficial to coral reef protection and local ecological management.

关键词： nitrogen dynamics sediments coral reefs Weizhou Island

A rapid and accurate 3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide colorimetric assay for quantification of bacteriocins with nisin as an example

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第8期8卷 549-554页

作者： WANG fang cao Li-ting HU Song-hua Department of Veterinary Medicine College of Animal Sciences Zhejiang University Hangzhou 310029 China

The objective of this study is to propose a more accurate and faster MTT 3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide colorimetric assay (MCA) for quantitative measurement of polypeptide bacteriocins in solutions with nisin as an example. After an initial incubation of nisin and indicator bacterium Micrococcus luteus NCIB 8166 in tubes, MTT was added for another incubation period. After that, nisin was quantified by estimating the number of viable bacteria based on measuring the amount of purple formazan produced by cleavage of yellow tetrazolium salt MTT. Then MCA was compared to a standard agar diffusion assay (ADA). The results suggested a high correlation coefficient (r2=0.975±0.004) between optical density (OD) and the inhibitory effect of nisin on a bacterial strain Micrococcus luteus NCIB 8166 at a range of 0.125～32 IU/ml. The MCA described in this study was very quick. Quantification of nisin took only 7～8 h and the detection limit was at the level of 0.125 IU/ml when compared to 12 IU/ml and 24～28 h for ADA. The MCA provides an accurate and rapid method for quantifi-cation of nisin in solutions and is expected to be used for quantification of other antimicrobial substances.

关键词： MTT colorimetric assay Nisin Micrococcus luteus

CHAUS:Scalable VM-Based Channels for Unbounded Streaming

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Journal of Computer Science & Technology 2017年第6期32卷 1288-1304页

作者： Yu Zhang Yu-Fen Yu Hui-fang cao Jian-Kang Chen Qi-Liang Zhang School of Computer Science and Technology University of Science and Technology of China Hefei 230027 China

Stream processing is a special form of the dataflow execution model that offers extensive opportunities for optimization and automatic parallelism. A streaming application is represented by a graph of computation stages that communicate with each other via FIFO channels. In shared-memory environment, an FIFO channel is classically a com- mon, fixed-size synchronized buffer shared between the producer and the consumer. As the number of concurrent stage workers increases, the synchronization overheads, such as contention and waiting times, rise sharply and severely impair application performance. In this paper, we present a novel multithreaded model which isolates memory between threads by default and provides a higher level abstraction for scalable unicast or multicast communication between threads -- CHAUS （Channel for Unbounded Streaming）. The CHAUS model hides the underlying synchronization details, but requires the user to declare producer-consumer relationship of a channel in advance. It is the duty of the runtime system to ensure reliable data transmission at data item granularity as declared. To achieve unbounded buffer for streaming and reduce the synchronization overheads, we propose a virtual memory based solution to implement a scalable CHAUS channel. We check the programmability of CHAUS by successfully porting dedup and ferret from PARSEC as well as implementing MapReduce library with Phoenix-like API. The experimental results show that workloads built with CHAUS run faster than those with Pthreads, and CHAUS has the best scalability compared with two Pthread versions. There are three workloads whose CHAUS versions only spend no more than 0.17x runtime of Pthreads on both 16 and 32 cores.

关键词： streaming thread model pipeline parallelism unbounded channel virtual memory