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Adsorption of surfactants onto acrylic ester resins with different pore size distribution

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Science china Chemistry 2006年第5期49卷 445-453页

作者： YANG Weiben1,2,3,LI Aimin1,3,CAI Jianguo1,3,MENG Guanhua1,3 & ZHANG Quanxing1,3 1. State Key laboratory of Pollution Control and Resource Reuse,School of the Environment,nanjing university,nanjing 210093,china 2. nanjing College of Chemical Technology,nanjing 210048,china 3. Jiangsu Engineering & Technology research Center for Organic Toxicant Control and Resource Reuse,nanjing 210038,china 1. State Key laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210093 China 2. nanjing College of Chemical Technology Nanjing 210048 China 3. Jiangsu Engineering & Technology research Center for Organic Toxicant Control and Resource Reuse Nanjing 210038 China

In this study, a series of acrylic ester resins with different pore size distribution were prepared successfully by varying the type and the amount of pore-forming agents. In order to inves-tigate the adsorption behavior and mechanism of surfactants on acrylic ester resins, three kinds of surfactants were utilized as adsorbates that were sodium 6-dodecyl benzenesulfonate (6-NaDBS), sodium 1-dodecyl benzene sulfonate (1-NaDBS) and sodium 1-dodecyl sulfonate, respectively. It was observed that the surface area was available in a particular pore size and an appropriate pore size of resins appeared to be more important for the adsorption of surfactants. As compared to commercial acrylic ester resins XAD-7 and HP2MG, 50# and 38# resins exhibited more excellent adsorption properties toward 1-NaDBS and 6-NaDBS. The experimental equilibrium data were fitted to the Langmuir, and double-Langmuir models. Two models provided very good fittings for all resins over the temperature range studied. The investigation indicated that electrostatic attraction and hydrogen bond between resins and surfactants were the main forces and had an obvious effect on adsorption proc-ess.

关键词： acrylic ester resin, surfactant, adsorption, pore size distribution, isotherm.

NEAR OPTIMAL CLUSTER-HEAD SELECTION FOR WIRELESS SENSOR NETWORKS

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Journal of Electronics(china) 2007年第6期24卷 721-725页

作者： Zhu Xiaorong Shen Lianfeng national mobile Comm. research Lab Southeast University Nanjing 210096 China

Clustering in wireless sensor networks is an effective way to save energy and reuse bandwidth. To our best knowledge, most of the clustering protocols proposed in literature are of a dynamic type, where cluster heads are selected in each period, followed by cluster formation. In this paper, a new static type clustering method called Hausdorff clustering, which is based on the location of sensor nodes as well as communication efficiency and network connectivity, is proposed. The cluster head, however, is rotated within the cluster by a fuzzy logic algorithtn that optimizes the network lifetime. Simulation results show that this approach can significantly increase the lifetime of the sensor network.

关键词： Sensor networks Hausdorff clustering Fuzzy logic

In situ synthesis of DNA micro-arrays using typography technique

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Science china Chemistry 2007年第1期50卷 75-83页

作者： TANG JianXin 1,2 ,HE NongYue 1,2,3 &LI Song 1 1State Key laboratory of Bioelectronics,southeast university,nanjing 21.096,china 2Key laboratory of Green Packaging and Application of Biological Nanotechnology of Hunan Province,Hunan university of Tech- nology,Zhuzhou 412008,china 3Zhongshan Huoju Polytechnic,Zhongshan 528436,china 1. State Key laboratory of Bioelectronics Southeast University Nanjing 210096 China 2. Key laboratory of Green Packaging and Application of Biological Nanotechnology of Hunan Province Hunan University of Technology Zhuzhou 412008 China 3. Zhongshan Huoju Polytechnic Zhongshan 528436 China

A novel typography technique was developed to in situ synthesize oligonucleotide arrays on glass slide,which has the celerity,high spatial resolution,lower cost,reliable operation,and high synthetic *** principle and process of the typography technique for fabricating gene-chips have been described in detail.A suit of poly(terafluoroethylene)devices for synthesizing oligonucleotide arrays were designed and prepared,and the fiber tubes with a number of nano-or micron-channels were em- *** oligonucleotide arrays of 16 and 160 features with four different probes were synthesized using the typography *** four specific oligonucleotide probes including the matched and the mismatched by the fluorescent target sequence gave obviously different hybridization fluorescent *** was indicated that the gene-chip fabricated by the typography method could be used to rapidly screen single-nucleotide polymorphisms(SNP)and to detect mutations.

关键词： typography oligonucleotide in situ synthesis DNA microarrays

Preparation of Compound Ultrafine CeO2 by Wet-Solid-Phase Mechanochemical Modification

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Journal of Rare Earths 2004年第Z1期22卷 42-45页

作者： Gu Ziyin Chen Weifan（china national Special Superfine Powder Engineering research Center, nanjing university of Science & Technology, nanjing 10094, china） Hu Pinggui Li Yongxiu Engineering research Center for Rare Earth Nanchang UniversityNanchang 330047 China 　　 Engineering Research Center for Rare Earth Nanchang UniversityNanchang 330047 China Engineering Research Center for Rare Earth Nanchang UniversityNanchang 330047 China

To satisfy practical requirements from industrial applications, an alternate route for synthesis compound ultrafine CeO2 powders by wet-solid-phase mechanochemical modification using industrial grade hydrated cerium carbonate as raw material was *** effect of modifier reaction percentage, reaction time, calcining temperature and modifier amount on particle size, density, suspensibility, and hardness of compound CeO2 powder was *** phase evolutions of preparation process were characterized by *** micrograph of the final product shows that compound CeO2 powders obtained are well-dispersed, spherically-shaped, uniformly-sized and submicron-sized *** method is readily available in raw material, low in cost, simple in process, and has great potential for *** compound CeO2 powders of different physical properties can be synthesized by controlling the above-mentioned influence factors in preparation process.

关键词： ultrafine compound CeO2 powder mechanochemical modification preparation rare earths

Low-Complexity Detection and Decoding Scheme for LDPC-Coded MLC NAND Flash Memory

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china communications 2018年第6期15卷 58-67页

作者： Xusheng Lin Guojun Han Shijie Ouyang Yanfu Li Yi Fang School of Information Engineering Guangdong University of Technology national mobile communications research laboratory Southeast University

With the development of manufacture technology, the multi-level cell(MLC)technique dramatically increases the storage density of NAND flash memory. As the result,cell-to-cell interference(CCI) becomes more serious and hence causes an increase in the raw bit error rate of data stored in the ***, low-density parity-check(LDPC)codes have appeared to be a promising solution to combat the interference of MLC NAND flash memory. However, the decoding complexity of the sum-product algorithm(SPA) is extremely high. In this paper, to improve the accuracy of the log likelihood ratio(LLR) information of each bit in each NAND flash memory cell, we adopt a non-uniform detection(N-UD) which uses the average maximum mutual information to determine the value of the soft-decision reference ***, with an aim to reduce the decoding complexity and improve the decoding performance, we propose a modified soft reliabilitybased iterative majority-logic decoding(MSRBI-MLGD) algorithm, which uses a non-uniform quantizer based on power function to decode LDPC codes. Simulation results show that our design can offer a desirable trade-off between the performance and complexity for high-column-weight LDPC-coded MLC NAND flash memory.

关键词： Cell-to-cell interference(CCI) LDPC codes MLC NAND flash memory non-uniform detection(N-UD) modified soft reliability-based iterative majority-logic decoding(MSRBI-MLGD) algorithm

Recent progress of solar physics research in china

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research in Astronomy and Astrophysics 2011年第12期11卷 1377-1402页

作者： Cheng Fang 1 School of Astronomy and Space Science,nanjing university,nanjing 210093,china 2 Key laboratory of Modern Astronomy and Astrophysics(nanjing university),Ministry of Education,china School of Astronomy and Space Science Nanjing University Nanjing 210093 China Key laboratory of Modern Astronomy and Astrophysics (nanjing university) Ministry of Education China

Owing to the largely improved facilities and working conditions, solar physics research in china has recently shown marked development. This paper reports on the recent progress of solar physics research in china's Mainland, mainly focusing on several hot issues, including instrumentations, magnetic field observations and research, solar flares, filaments and their eruptions, coronal mass ejections and related processes, as well as active regions and the corona, small-scale phenomena, solar activity and its predictions. A vision of the future is also described.

关键词： Sun: general -- Sun: coronal mass ejections (CMEs) -- solar physics:recent progress

Experimental study on filtering,transporting, concentrating and focusing of microparticles based on optically induced dielectrophoresis

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Science china(Technological Sciences) 2010年第9期53卷 2388-2396页

作者： ZHU XiaoLu,YIN ZhiFeng,GAO ZhiQiang & NI ZhongHua Jiangsu Key laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments,southeast university,nanjing 211189,china 1. Jiangsu Key laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments Southeast University Nanjing 211189 China

The key problem to be solved for the dielectrophoresis (DEP) application is to provide dynamically reconfigurable microelectrodes and low-cost methodology for bioparticle *** emergence of optically induced DEP (ODEP) based on photoconductive effect provides a potential solution for the above *** this paper,an ODEP chip is designed and fabricated,and the corresponding experimental platform was established,whereupon four types of particle manipulation regimes–filtering,transporting,concentrating and focusing based on ODEP are experimentally demonstrated and the operating performances are quantitatively *** experiment results show that the functions and performances of ODEP manipulation are heavily dependent on the geometrical shape,scales and speed of optical patterns,actuating signal frequency and the electric conductivity of the *** manipulation efficiency can increase by more than 50% via increasing the optical line ***,the efficiency is obviously affected by the inclination angle of the optical oblique lines in the manipulation of particle ***,the maximum velocity of particles increases with the increment of the inside radius and the thickness of the optical trapping *** manipulation efficiency is always related to signal frequency and solution conductivity,and empirically,satisfactory performance and high efficiency are obtained when the solution electric conductivity ranges from 5×10-4 S/m to 5×10-3 S/m.

关键词： optically-induced dielectrophoresis particle manipulation filtering transporting concentrating focusing

宽带CDMA系统中最大多普勒频移估计方法的研究

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通信学报 2004年第6期25卷 157-165页

作者：盛彬尤肖虎东南大学移动通信国家重点实验室江苏南京210096

估计最大多普勒频移或者是移动台的速度对于优化接收机的性能至关重要。本文主要研究了宽带码分多址通信系统中四种最大多普勒频移的估计方法并通过对WCDMA系统的理论计算和计算机仿真比较了它们在具有各向同性散射体和高斯噪声的瑞利... 详细信息

估计最大多普勒频移或者是移动台的速度对于优化接收机的性能至关重要。本文主要研究了宽带码分多址通信系统中四种最大多普勒频移的估计方法并通过对WCDMA系统的理论计算和计算机仿真比较了它们在具有各向同性散射体和高斯噪声的瑞利信道中的性能差异。

关键词：宽带码分多址最大多普勒频移瑞利衰落信道

An efficient quantum secret sharing protocol with orthogonal product states

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Science china(Physics,Mechanics & Astronomy) 2007年第3期50卷 331-338页

作者： YANG YuGuang1,2, WEN QiaoYan3 & ZHU FuChen4 1 School of Computer, Beijing university of Technology, Beijing 100022, china 2 State Key laboratory of Information Security, Graduate university of Chinese Academy of Sciences, Beijing 100022, china 3 School of Science, Beijing university of Posts and Telecommunications, Beijing 100876, china 4 national Key laboratory for Modern communications, Chengdu 610041, china 1. School of Computer Beijing University of Technology Beijing 100022 China 2. State Key laboratory of Information Security Graduate University of Chinese Academy of Sciences Beijing 100022 China 3. School of Science Beijing University of Posts and Telecommunications Beijing 100876 China 4. national Key laboratory for Modern communications Chengdu 610041 China

An efficient quantum secret sharing protocol with orthogonal product states in the 33 Hilbert space is presented. The particles in the orthogonal product states form two particle sequences. One sequence is sent to Bob and the other is sent to Charlie after rearranging the particle orders. With the help of Alice, Bob and Charlie make the corresponding local measurement to obtain the information of the or- thogonal product states prepared. This protocol has many distinct features such as great capacity and high efficiency.

关键词： quantum secret sharing orthogonal product state orthogonal measurement