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Dielectric Spectroscopy Study on Vesicles of CTAB/SDBS System

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Chinese Chemical Letters 2001年第1期12卷 91-94页

作者： Su Xiang WEI Ying LI kong shuang zhao Department of Chemistry South China Normal UniversityGuangzhou 510631

Amphiphilic molecules can form into different structures, such as micelle, microemulsion, vesicle, liposome, liquid crystals, and so on by self-associating. The Dielectric Spectroscopy (DS) method has been applied to the systems of micelle and microemulsion successfully. For the first time the author put the method to the system of vesicle of CTAB/SDBS. The experiments show clear dielectric relaxation and the results were discussed primarily.

关键词： Dielectric spectroscopy vesicle macroscopic relaxation time

Studies on the Phase Properties of Winsor Ⅰ-Ⅲ Type Microemulsions with Dielectric Relaxation Spectroscopy

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Chinese Chemical Letters 2005年第9期16卷 1263-1266页

作者： Jin Ling CHAI Yan Hong GAO kong shuang zhao Gan Zuo LI Gao Yong ZHANG Department of Chemistry Shandong Normal University Jinan 250014 Key Laboratory for Colloid and Interface Chemistry of State Education Ministry Shandong University Jinan 250100 Department of Chemistry.Beijing Normal University Beijing 100875

The dielectric relaxation spectroscopy （DRS） of Winsor I -Ⅲ microemulsions for nonionic surfactant octyl polyglucoside CsG1.46/1-butanol/cyclohexanedwater system was studied. The experiment shows that the permittivity decreases with the increase in the frequency and clear dielectric relaxation phenomena were observed. Permittivity obviously decreases with the change of the microstructure of the microemulsion, W/O, B.C. and O/W can be distinguished by the permittivity.

关键词： Phase property microemulsion dielectric relaxation spectroscopy

Application of ultra-sonication, acid precipitation and membrane filtration for co-recovery of protein and humic acid from sewage sludge

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Frontiers of Environmental Science & Engineering 2016年第2期10卷 327-335页

作者： Liangliang WEI Kun WANG Xiangjuan kong Guangyi LIU shuang CUI Qingliang zhao Fuyi CUI Key Laboratory of Songliao Aquatic Environment (Ministry of Education) Jilin Jianzhu University Changchun 130118 China School of Mu-nicipal & Environmental Engineering Harbin Institute of Technology Harbin 150090 China Center of Science & Technology of Construction of the Ministry of Housing and Urban Rural Development of E R. China Beijing 100835 China Procter & Gamble Company Guangzhou 510620 China

A novel method was applied to co-recover proteins and humic acid from the dewatered sewage sludge for liquid fertilizer and animal feed. The proteins in sewage sludge were first extracted using the processes of ultra- sonication and acid precipitation, and then the humic acid was recovered via membrane filtration. The extraction efficiency was 125.9mg humic acid-gWSS volatile suspended solids （VSS） and 123.9 mg proteins-g-1 VSS at the optimal ultrasonic density of 1.5 W·mL-1. FT-IR spectrum results indicated that the recovered proteins and humic acid showed similar chemical characteristic to the natural proteins and humic acid. The acidic solution （pH 2） could be recycled and used more than 10 times during the co-recovery processes. In addition, the dewatered sludge could be easily biodegraded when the humic acid and proteins are extracted, which was essential for further utilization. These findings are of great significance for recovering valuable nutrient fi＇om sewage sludge.

关键词： sewage sludge co-recovery proteins humicacid recycling biodegradation rate

Dielectric Spectra of Aerosol OT/Water Systems at Different Concentrations and Temperatures

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Chemical Research in Chinese Universities 2011年第6期27卷 1065-1071页

作者： zhao kong-shuang JIA Zhan-jie YANG Li-kun XIAO Jin-xin College of Chemistry Beijing Normal University Beijing 100875 P. R. China Beijing FLUOBON Surfactant Institute Beijing 100080 P. R. China

The dielectric spectra of aerosol OT[AOT, sodium（bis-2-ethylhexyl）sulfosuccinate]/water systems at different concentrations and temperatures were investigated by the dielectric relaxation spectroscopy（DRS）. Through the dielectric spectra of different concentrations, two dielectric relaxations were observed over a frequency range from 40 Hz to 110 MHz and the mechanisms of the relaxations were also interpreted based on the Grosse’s model. The low-frequency relaxation（around 105 Hz） was attributed to the radial diffusion of counterions along the long-half axis of the rod-like micelle, and the high-frequency relaxation（around 106 Hz） was ascribed to the radial diffusion of counterions along the short-half axis. Furthermore, specific emphasis was placed on studying the effects of temperature on system’s conductivity. It was observed that the low-frequency limit of conductivity（κl） decreased and then increased with the increment of temperature under the measured concentration. On the other hand, the conductivity（κm and κh） in meso- and high-frequency ranges always increased as temperature increased. Both the tendencies of alteration which mentioned above should be related to the phase transition of AOT/water system.

关键词： Aerosol OT Rod-like micelle Dielectric relaxation spectroscopy

Diagnosing holographic type dark energy models with the Statefinder hierarchy, composite null diagnostic and w-w′pair

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Science China(Physics,Mechanics & Astronomy) 2018年第3期61卷 65-76页

作者： Ze zhao shuang Wang CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences School of Physical Science University of Chinese Academy of Sciences School of Astronomy and Space Science Sun Yat-Sen University

The main purpose of this work is to distinguish various holographic type dark energy （DE） models, including the AHDE, HDE, NADE, and RDE model, by using various diagnostic tools. The first diagnostic tool is the Statefinder hierarchy, in which the evolution of Statefinder hierarchy parmeter S3（1）（z） and S4（1）（z） are studied. The second is composite null diagnostic （CND）, in which the trajectories of {S（1）4, ∈} and {S4（1）, e} are investigated, where ∈ is the fractional growth parameter. The last is w-w′ analysis, where w is the equation of state for DE and the prime denotes derivative with respect to lna. In the analysis we consider two cases： varying current fractional DE density Ωde0 and varying DE model parameter C. We find that：（1） both the Statefinder S4（1） can lead to larger hierarchy and the CND have qualitative impact on AHDE, but only have quantitative impact on HDE. （2） S4（1） differences than S 4（1）, while the CND pair has a stronger ability to distinguish different models than the Statefinder hierarchy. （3） For the case of varying C, the {w, w′} pair has qualitative impact on AHDE; for the case of varying Ωde0, the {w, w′} pair only has quantitative impact; these results are different from the cases of HDE, RDE, and NADE, in which the {w, w′} pair only has quantitative impact on these models. In conclusion, compared with HDE, RDE, and NADE, the AHDE model can be easily distinguished by using these diagnostic tools.

关键词： dark energy cosmology cosmological constant

Copolymerization and Properties of Multicomponent Crosslinked Hydrogels

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Chinese Journal of Polymer Science 2015年第1期33卷 173-183页

作者： Zheng-bai zhao shuang-shuang An Hai-jiao Xie 姜勇 School of Chemistry and Chemical Engineering Southeast University

A series of multicomponent hydrogels were prepared by the copolymerization of hydrophobic silicon-containing monomer 3-bis（trimethylsilyloxy） methylsilylpropyl glycerol methacrylate（Si MA） with the solvent-responsive monomers 2-hydroxyethyl methacrylate（HEMA） and N-vinyl pyrrolidone（NVP） and thermosensitive monomer N,N-dimethyl acrylamide（DMA）. 2-Hydroxy-2-methyl phenyl acetone（D-1173） was chosen as UV initiator and five different dienes/triene monomers were selected as crosslinking agent in order to select the best crosslinker. The ethanol extraction experiments as well as the FTIR, DSC and TG results showed that the copolymerization was effective. The optical, permeability, and mechanical analysis results demonstrated that the obtained hydrogels were highly transparent with good oxygen permeability and mechanical properties. And the impact of crosslinker on the mechanical properties of the hydrogels was also discussed in detail. The basic results demonstrated that the obtained hydrogels had good stimuli-responsive effects to both p H value and solvent.

关键词： Multicomponent hydrogel Silicon-containing monomer Hydrophilic monomer Crosslinker Stimuli-responsive.

Multiple CRC-aided variable successive cancellation list decoder of polar codes

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The Journal of China Universities of Posts and Telecommunications 2017年第2期24卷 83-88页

作者： Cao Miao zhao shuang zhao Shengmei Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications

In order to change the path candidates, reduce the average list size, and make more paths pass cyclic redundancy check （CRC）, multiple CRC-aided variable successive cancellation list （SCL） decoding algorithm is proposed. In the decoding algorithm, the whole unfrozen bits are divided into several parts and each part is concatenated with a corresponding CRC code, except the last part which is concatenated with a whole unfrozen CRC code. Each CRC detection is performed, and only those satisfying each part CRC become the path candidates. A variable list is setup for each part to reduce the time complexity. Variable list size is setup for each part to reduce the time complexity until one survival path in each part can pass its corresponding CRC. The results show that the proposed algorithm can reduce the average list size, and the frame error rate （FER） performance, and has a better performance with the increase of the part number.

关键词： polar codes successive cancellation list decoder cyclic redundancy check list path variable list size

Supercooling Suppression of Microencapsulated n-Alkanes by Introducing an Organic Gelator

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Chemical Research in Chinese Universities 2012年第3期28卷 539-545页

作者： ZHU kong-ying WANG shuang QI Heng-zhi LI Hui zhao Yun-hui YUAN Xiao-yan Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300072P.R.China Analysis and Measurement Center Tianjin UniversityTianjin 300072P.R.China

Supercooling of the microencapsulated phase change materials（PCMs） during cooling usually happens. This phenomenon can interfere with heat transfer and is necessary to further overcome. In this study, mela- mine-formaldehyde microcapsules containing two n-alkane PCMs, namely, n-dodecane（Cl2） or n-tetradecane（C14） were prepared by in situ polymerization. A small amount of n-hexatriacontane（C36） was introduced as an organic ge- lator into the core of microcapsules to cope with the supercooling problem. Analyses demonstrate that supercooling of the microencapsulated C12 or C14 was significantly suppressed by adding 3%（mass fraction） C36, without changing the spherical morphology and dispersibility. It could be also found that the enthalpy of microencapsulated CI2 or C14 containing C36 was similar to that of microencapsulated n-alkanes without C36, whereas the difference between onsets of crystallization and melting（degree of supercooling） is similar to that of those of pure n-alkanes, suggesting the re- markable suppression ability of the organic gelator on supercooling.

关键词： Supercooling Microcapsule Phase change material Gelator n-Alkane

Gene Expression Data Classification Using Consensus Independent Component Analysis

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Genomics, Proteomics & Bioinformatics 2008年第2期6卷 74-82页

作者： Chun-Hou Zheng De-shuang Huang Xiang-Zhen kong Xing-Ming zhao College of Information and Communication Technology Qufu Normal University Rizhao 276826 China Intelligent Computing Lab Institute of Intelligent Machines Chinese Academy of Sciences Hefei 230031China

We propose a new method for tumor classification from gene expression data, which mainly contains three steps. Firstly, the original DNA microarray gene expression data are modeled by independent component analysis （ICA）. Secondly, the most discriminant eigenassays extracted by ICA are selected by the sequential floating forward selection technique. Finally, support vector machine is used to classify the modeling data. To show the validity of the proposed method, we applied it to classify three DNA microarray datasets involving various human normal and tumor tissue samples. The experimental results show that the method is efficient and feasible.

关键词： independent component analysis feature selection support vector machine gene expression data