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Investigation of 'chazi'(damaged-enamels)on Chenghua doucai Porcelains

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science china(Technological sciences) 2009年第6期52卷 1722-1729页

作者： DU Feng1 & SU BaoRu2 1 Institute of Chemistry & Molecular Engineering,qingdao university of science & technology,qingdao,china 2 College of Information science & technology,qingdao university of science & technology,qingdao,china Institute of Chemistry & Molecular Engineering Qingdao University of Science & Technology Qingdao China College of Information science & technology Qingdao University of Science & Technology Qingdao China

At the end of the 1950s,Sun Yingzhou considered that the 'chazi'(damaged colour)on Chenghua doucai imperial porcelain as a defect was originally produced in firing process during Chenghua period(1465―1487).Researchers in china have accepted his *** any fragment with the 'chazi' has never been found in several tons of Chenghua imperial sherds excavated from Ming imperial kiln site in *** china,few scholars have questioned the formation of 'chazi',and further investigated *** researchers at the Research Laboratory in the British Museum,employing unde-structive EDXRF,have analyzed the chemical composition of the 'chazi'(damaged colour)on a Chen-ghua doucai stem cup in the museum,and they have confirmed that the 'chazi'(damaged colour)was caused by the fire of the Jianfu palace in the Forbidden City in *** on their research,the authors studied the colour chemical principle of the 'chazi's' formation *** to the ceramic technology principle,scientific reasoning for the 'chazi' was carried *** the help of the history of Qing court,the brainteaser of the 'chazi' was totally uncovered,the misunderstanding for the 'chazi' has also been *** research also suggests that employing modern science and technology is a direction to study Chinese ancient ceramic further.

关键词： Chenghua doucai porcelains court eunuchs the set on fire at the Jianfu palace ’chazi’(damaged-enamels) the British Museum colour chemical principle archaeology using science and technology

Further study of sources of the imported cobalt-blue pigment used on Jingdezhen porcelain from late 13 to early 15 centuries

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science china(Technological sciences) 2008年第3期51卷 249-259页

作者： DU Feng1 & SU BaoRu2 1 Institute of Chemistry & Molecular Engineering, qingdao university of science & technology, qingdao 266000, china 2 College of Information science technology, qingdao university of science & technology, qingdao 266000, china Institute of Chemistry & Molecular Engineering Qingdao University of Science & Technology Qingdao 266000 China College of Information science technology Qingdao University of Science & Technology Qingdao 266000 China

Based on the conclusion of modern scientific analysis: the cobalt-blue pigment applied on Jingdezhen official porcelain during Yuan Dynasty and prior to Xuande reign of Ming Dynasty (1271―1425) contains high iron and low manganese con- tents, and the cobalt during Xuande and after Xuande periods (after 1426) of Ming Dynasty contains high manganese and low iron contents, in combination with the traditional archaeological method, the related historical textual records were in- vestigated and analyzed, the imported cobalt employed on Jingdezhen official porcelain was studied comprehensively, systematically and logically. In fact, 'Su Ma Li Qing' (Samarra-blue) and 'Su Bo Ni Qing' (Sumatra-blue) are definitely different cobalt ores originated in different places, because of their very similar translitera- tions in Chinese, the confusion has appeared in ancient books for more than 400 years, which considered 'Su Ma Li Qing' and 'Su Bo Ni Qing' as the same co- balt-blue pigment. In this article the mistake was corrected, the possible producing places and the approximate eras of the two pigments imported to china and used at Jingdezhen were also suggested.

关键词： imported cobalt-blue pigments employed on official blue-and-white porcelain Yuan Dynasty early Ming Dy- nasty Mn/Fe content ratio Su Ma Li Qing (Samarra-blue) Su Bo Ni Qing (Sumatra-blue) scientific archae- ological research transliteration

Approximately optimal tracking control for discrete time-delay systems with disturbances

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Progress in Natural science:Materials International 2008年第2期18卷 225-231页

作者： Gongyou Tang a,,Huiying Sun b,Haiping Pang c a College of Information science and Engineering,Ocean university of china,qingdao 266100,china b College of Information and Electrical Engineering,Shandong university of science and technology,qingdao 266510,china c College of Automation and Electronic Engineering,qingdao university of science and technology,qingdao 2.6042.china College of Information science and Engineering Ocean University of China Qingdao 266100 China College of Information and Electrical Engineering Shandong University of Science and Technology Qingdao 266510 China College of Automation and Electronic Engineering Qingdao University of Science and Technology Qingdao 266042 China

Optimal tracking control (OTC) for discrete time-delay systems affected by persistent disturbances with quadratic performance index is considered. By introducing a sensitivity parameter,the original OTC problem is transformed into a series of two-point boundary value (TPBV) problems without time-advance or time-delay terms. The obtained OTC law consists of analytic feedforward and feedback terms and a compensation term which is the sum of an infinite series of adjoint vectors. The analytic feedforward and feedback terms can be found by solving a Riccati matrix equation and two Stein matrix equations. The compensation term can be obtained by using an iteration formula of the adjoint vectors. Observers are constructed to make the approximate OTC law physically realizable. A simulation example shows that the approximate approach is effective in tracking the reference input and robust with respect to exogenous persistent disturbances.

关键词： Discrete systems Time-delay systems Disturbances Optimal control Tracking control

Analysis on Influence Factors of Real-time Identification of Neural Network in Sheet Intelligent Bending

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稀有金属材料与工程 2011年第S3期40卷 14-18页

作者： Su Chunjian, Zhang Guangheng, Guo Sumin Shandong university of science and technology, qingdao 266510, china Shandong Univ Sci & Technol Coll Mech & Elect Engn Qingdao 266510 Peoples R China

The scheme of intelligent control system of cap-bending has been advanced in this paper using the neural network technology, based on the prominent problem that bending springback difficult to control accurately during the forming process of cap-bending. The key technology of real-time identification for material performance parameter and friction coefficient was researched, and the back-propagation neural network of real-time identification for material performance parameters and friction coefficient was established, which can real-time identify the needed material performance parameters through the real-time monitoring variable. Factors that affecting recognition results of neural network model were analyzed, such as influences of the selection of the sample date and the algorithm for identification result. Factors affecting neural network generalization ability were discussed, such as influences of the selection of the sample date and the node number of the hidden layer for generalization ability. The results provide a guarantee for improving the convergence accuracy and the generalization ability of network, and provide a basis for the building of intelligent bending control of network model.

关键词： sheet bending intelligent control real-time identification influence factor

A video encryption method based on chaotic maps in DCT domain

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Progress in Natural science:Materials International 2008年第10期18卷 1299-1304页

作者： Shuguo Yang~(a,b,*) Shenghe Sun~a ~a School of Electrical Engineering and Automation,Harbin Institute of technology,Harbin 150001,china ~b qingdao university of science and technology,qingdao 266061,china School of Electrical Engineering and Automation Harbin Institute of Technology Harbin 150001 China qingdao university of science and technology Qingdao 266061 China

This paper proposes a new and secure video encryption method based on chaotic maps in DCT domain,which is quite in keeping with the common ideas and the frequent practices of video *** select the I-frames of the video sequence as encryption objects. First,we introduce two coupling chaotic maps to scramble the DCT coefficients of every original I-frame,and receive the scrambled ***,we encrypt the DCT coefficients of the scrambled 1-frame using another chaotic *** the whole process,we use three chaotic maps and five keys;the I-frame is encrypted ***,we performed several tests and the experimental results have proved our method to be secure and efficient.

关键词： Video encryption Chaotic map I-frame Scrambling Video sequence

Stereocontrol during the radical polymerization of methyl methacrylates with combined Lewis acids:Aluminium trichloride(AlCl_3) and iron dichloride tetrahydrate

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science china Chemistry 2010年第5期53卷 1141-1147页

作者： SANG Qian,FENG Ying ,DONG XiuCai & ZHAO JiRuo Key Laboratory of Rubber-Plastics,Ministry of Education qingdao university of science and technology,qingdao 2.6042.china 1. Key Laboratory of Rubber-Plastics Ministry of Education Qingdao University of Science and Technology Qingdao 266042 China

The radical polymerization of methyl methacrylate(MMA) was carried out in the presence of combined Lewis acids of the AlCl3-FeCl2 *** with the polymerization produced in the presence of single Lewis acids,AlCl3 or FeCl2,the MMA polymerization in the presence of AlCl3-FeCl2 composite in CHCl3 or 1-butanol produced a polymer with a higher isotacticity and in toluene produced a polymer with a much higher isotacticity(mm=50%) .The molecular weight and polydispersity of PMMA in the presence of Lewis acids were similar with those in the absence of Lewis acids,although Lewis acids decelerate the polymerization of *** effects of the Lewis acids were greater in a solvent with a lower polarity.A possible stereocontrol mechanism of the polymerization was *** Lewis acid composite of AlCl3-FeCl2 readily formed a complex with growing *** complexes possessed apparent bulkiness that changes the direction of monomer addition to the growing radical center.

关键词： MMA radical polymerization tacticity Lewis acid stereocontrol polymerization

Nano Au/TiO_2 hollow microsphere membranes for the improved sensitivity of detecting specific DNA sequences related to transgenes in transgenic plants

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science china Chemistry 2008年第11期51卷 1066-1073页

作者： ZHANG YongChun, YANG Tao, ZHOU Na, ZHANG Wei & JIAO Kui College of Chemistry and Molecular Engineering, qingdao university of science and technology, qingdao 2.6042, china 1. College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 China

Gold nanoparticles (nano Au)/titanium dioxide (TiO2) hollow microsphere membranes were prepared on the carbon paste electrode (CPE) for enhancing the sensitivity of DNA hybridization detection. The immobilization of nano Au and TiO2 microsphere was investigated with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The hybridization events were monitored with EIS us-ing [Fe(CN)6]3-/4- as indicator. The sequence-specific DNA of the 35S promoter from cauliflower mosaic virus (CaMV35S) gene was detected with this DNA electrochemical sensor. The dynamic detection range was from 1.0×10-12 to 1.0×10-8 mol/L DNA and a detection limit of 2.3×10-13 mol/L could be ob-tained. The polymerase chain reaction (PCR) amplification of the terminator of nopaline synthase (NOS) gene from the real sample of a kind of transgenic soybean was also satisfactorily detected.

关键词： Au nanoparticle TiO_2 hollow microsphere DNA electrochemical biosensor CaMV35S gene NOS gene

Preparation, characterization, viscosity and thermal conductivity of CaCO_3 aqueous nanofluids

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science china(Technological sciences) 2010年第2期53卷 360-368页

作者： ZHU HaiTao1, LI ChangJiang2, WU DaXiong1, ZHANG CanYing1 & YIN YanSheng2 1 College of Materials science and Engineering, qingdao university of science and technology, qingdao 2.6042, china 2 Department of Materials, Ocean university of china, qingdao 266003, china 1. College of Materials science and Engineering Qingdao University of Science and Technology Qingdao 266042 China2. Department of Materials Ocean University of China Qingdao 266003 China

CaCO3 aqueous nanofluids were prepared by dispensing aqueous CaCO3 paste into distilled water under ultrasonic vibration. The actual microstructures of the CaCO3 nanofluids with different particle volume fractions were characterized by freeze etching replication transmission electron microscopy (FERTEM). Thermal conductivity and rheological behavior of the nanofluids were measured by standard analyzers. The results show that CaCO3 paste as raw material for nanofluids is advantageous to reducing aggregation of primary nanoparticles. The effective viscosities and effective thermal conductivities of the CaCO3 nanofluids are related to the aggregates of nanoparticles and can be well predicted by the modified Krieger & Dougherty formula and the modified Hamilton & Crosser model, respectively.

关键词： CaCO3 nanofluid thermal conductivity viscosity microstructure

Plastic Deformation of Nano-TiO_2 Ceramics Prepared by Different Methods

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Journal of Materials science & technology 1999年第1期15卷 71-74页

作者： Zuolin CUI(Research Center of Nanostructure Materials, qingdao Institute of Chemical technology, 2.6042 qingdao, china) Research Center of Nanostructure Materials Qingdao Institute of Chemical Technology 266042 Qingdao China

The comparative study of the tensile plastic deformation of nano(n)-TiO2 ceramic prepared byphysical gas condensation (P) and chemical hydrolysis precipitation (C) methods was conductedby a gas pressure forming technique at 750~800℃. The results show that n-TiO2 (P) possessesexcellent property of tensile pIastic deformation comparing with n-TiO2(C). The reason for thisis attributed to the surface cleanness and soft agglomeration of n-TiO2 (P) particfe prepared inreIatively cIean vacuum condition.

关键词： TiO Nano Plastic Deformation of Nano-TiO2 Ceramics Prepared by Different Methods