Technique Center

China, China

Technique Center

China, China
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Gou X.-F.,Lanzhou Jiaotong University | Zhu L.-Y.,Lanzhou Jiaotong University | Xie J.-L.,Technique Center
Proceedings - 2010 3rd International Congress on Image and Signal Processing, CISP 2010 | Year: 2010

A self-exciting vibration model of a single-degree-of-freedom blooming mill, part of the main blooming drive system, is presented and its dynamical equation is established. According to the bifurcation, phase portrait and Poincaré portrait, the nonlinear dynamical motions are studied in one parameter. The software Matlab/Simulink is used to create a block diagram of the circuit system. The result of the simulation verifies the motion of the circuit system and is consistent with a numerical simulation of the mechanical system. The software Multisim is used to simulate the mathematical description of the circuit, and a phase portrait analysis is performed. Because there are errors in the electronic elements, the result of the circuit simulation using Multisim is different from the numerical simulation of the mechanical system. ©2010 IEEE.

Zhu H.,Zhejiang Sci-Tech University | Zhang Y.,Zhejiang Sci-Tech University | Yang X.,Zhejiang Sci-Tech University | Liu H.,Zhejiang Sci-Tech University | And 3 more authors.
Journal of Hazardous Materials | Year: 2015

The waste management of used flocculants is a thorny issue in the field of wastewater treatment. To natural cellulose based flocculants, utilization of hazardous cellulose solvent and simplification of synthetic procedure are the two urgent problems needing to be further improved. In this work, a series of natural dicarboxyl cellulose flocculants (DCCs) were one-step synthesized via Schiff-base route. The cellulose solvent (NaOH/Urea solution) was utilized during the synthesis process. The full-biodegradable flocculants avoid causing secondary pollution to environment. The chemical structure and solution property of the DCC products were characterized by FT-IR, 1H NMR, 13C NMR, TGA, FESEM, charge density and ζ-potential. Kaolin suspension and effluent from paper mill were selected to evaluate the flocculation activity of the DCCs. Their flocculation performance was compared with that of commercial cationic polyacrylamide and poly aluminium chloride flocculants. The positive results showed that the NaOH/Urea solvent effectively promoted the dialdehyde cellulose (DAC) conversion to DCC in the one-step synthesis reaction. The DCCs with the carboxylate content more than 1mmol/g exhibited steady flocculation performance to kaolin suspension in the broad pH range from 4 to 10. Its flocculation capacity to the effluent from paper mill also showed excellent. © 2015 Elsevier B.V.

Liu Z.-B.,Control Iron and Steel Research Institute, China | Liang J.-X.,Control Iron and Steel Research Institute, China | Li W.-H.,Control Iron and Steel Research Institute, China | Zhang X.-L.,Technique Center | And 2 more authors.
Kang T'ieh/Iron and Steel | Year: 2015

A new ultra-high strength stainless steel with ultra-high purity has been successfully developed through the-precipitation hardening of intermetallic compound and carbide and ultra-clean. The results show that its tensile strength Rm is 1 940 MPa, and the fracture toughness, KIC, is more than 90 MPa·m1/2. Besides, it also shows good fatigue and high-temperature mechanical properties. The corrosion resistance of the steel is equivalent to that of 15-5PH stainless steel under the condition of the marine atmosphere and sea water immersion, which is much better than that of AerMet100 steel at the same strength level. Due to the excellent combination of mechanical and anti-corrison properties, the developed steel is expected to be widely used in the fields of aviation, aerospace, advanced machinery, and nuclear. ©, 2015, Chinese Society for Metals. All right reserved.

Yang N.-Y.,Nanjing University of Traditional Chinese Medicine | Liu L.,Nanjing University of Traditional Chinese Medicine | Tao W.-W.,Nanjing University of Traditional Chinese Medicine | Duan J.-A.,Nanjing University of Traditional Chinese Medicine | Tian L.-J.,Technique Center
Phytochemistry | Year: 2010

Five diterpenoids and 14 known diterpenoids were isolated from the petroleum ether extract of Pinus massoniana resin. Their structures were elucidated by spectroscopic data interpretation. The cytotoxic activities of these compounds were evaluated using the MTT method. The results showed that three of the less polar diterpenoids had strong cytotoxicity against A431 and A549 cancer cells, whereas those of high polarity had none. © 2010 Elsevier Ltd. All rights reserved.

Shan X.,Anhui University of Architecture | Guanghui X.,Anhui University of Architecture | Jianhua C.,Anhui University of Architecture | Wanyun Y.,Technique Center
Advanced Materials Research | Year: 2012

Based on the energy saving design standards in hot summer and cold winter zone like Anhui province, a new type of sandwich insulation composite wall panel is researched, Influence on thermal performances of new sandwich insulation composite wall panel due to in different thermal insulation material, different content of the oblique connection rebar, different thermal insulation layer thickness and different internal and external wall thickness, are analyzed. The results show that, in not take extra insulation measures, this kind of sandwich insulation composite wall panel thermal performance can meet the hot summer and cold winter area energy-saving design standard requirements. Research results and practical engineering contact tightly, It has a comparatively high practical value. © (2012) Trans Tech Publications, Switzerland.

Ding K.,Anhui University of Architecture | Wang G.,Anhui University of Architecture | Yin W.,Technique Center
Applied Mechanics and Materials | Year: 2013

As a new constructional material, composite sandwich panels are applied in engineering more often than ever. This paper focuses on the structure and foreign research status of sandwich panels which are used in practical engineering problems that need attention. The structure of the composition of the sandwich panel, force characteristics and analysis methods, a set of load-bearing thermal insulation, sound insulation and decoration in one of the new sandwich insulation composite wall form, can comprehensively address architectural, structural safety, and contradict the thermal insulation performance and durability problem. Thus they can be better applied to the engineering practice and meet the development requirement of building energy-saving and adaptation of housing industrialization. © (2013) Trans Tech Publications, Switzerland.

Yang R.-D.,South China University of Technology | Cheng Z.,South China University of Technology | Chen G.-W.,South China University of Technology | Chen G.-W.,Technique Center | Yang F.,South China University of Technology
Journal of Applied Polymer Science | Year: 2015

Powder coating for dry coating technique of paper as the promising method has attracted more and more attentions in recent years due to its advantages in reducing the dosage of water and saving energy compared with conventional coating. This study focused on the in situ polymerization of methyl methacrylate (PMMA) under a water-free condition in supercritical carbon dioxide in the presence of inorganic kaolin. The effects of varying the concentrations of the monomer, initiator, and stabilizer on the molecular weight and morphology of the resultant PMMA were investigated and discussed. Then the powder coating was systematically evaluated and characterized by gel permeation chromatography, scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Meanwhile, the feasibility of manufacturing PMMA/kaolin powder coatings was explored, and the mechanism of polymerization and the thermal degradation kinetics of powder coating were studied. The experimental results showed that the properties of PMMA as a film former were suitable with the molecular weight and narrow molecular weight distribution close to that in conventional coating when the concentration of monomer was about 10 wt %, concentration of initiator ∼1-1.5 wt % and stabilizer about 10 wt % with respect to monomer. Moreover, the interfacial bonds and dispersion situation of polyacrylic ester-based water-free powder coating particles were fairly well, the powder coating possesses good film-forming property combined with outstanding thermal-stability performance. The combination of these characteristics makes PMMA/kaolin powder coating an excellent candidate for dry coating technique of paper applications. © 2015 Wiley Periodicals, Inc.

Zhou L.-C.,Technique Center
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2010

Wear is one of the common failures of contact mechanical seal. The main wear types, seal law of the mechanical seal in high consistency refiner of P-RC APMP line are analyzed based on the basis structure, working principal and design feature of its mechanical seal. In order to extend the life of mechanical seal, controlling the critical parameters affecting the wear rate is proposed.

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