检索结果-南通市图书馆

Inner wall running state monitoring for the main pipe of nuclear power

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2013年第10期56卷 2606-2614页

作者： ZHANG YuCun zhou shan FU XianBin Institute of Electrical Engineering Yanshan University

The heat conduction equation is solved in this paper under specific boundary *** coefficients of the obtained distribution equation are simplified with the piecewise integral *** the associated model for the cylindrical thermal equipment is *** relationship of the surface temperatures,the material properties and the inner wall state of the cylindrical thermal equipment is described in the associated *** model is applied to the inner wall running state monitoring of the main pipe.A multi-channel distributed optical fiber temperature measurement system is designed to acquire the external surface temperatures of the main *** the associated model can be used to analyze the surface temperature data of the main *** location and the physical dimension of the inner wall defect can be ***,the inner wall defect monitoring of the main pipe can be *** feasibility of this method is verified by *** method also provides a theoretical basis for the real-time monitoring of the main pipe’s internal state.

关键词： inner wall defect running state monitoring multi-channel distributed optical fiber temperature measurement mainpipe of nuclear power

Bioleaching of two different types of chalcopyrite by Acidithiobacillus ferrooxidans

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2013年第2期20卷 119-124页

作者： Ying-bo Dong Hai Lin Kai-bin Fu Xiao-fang Xu shan-shan zhou Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education) University of Science and Technology Beijing School of Civil and Environmental Engineering University of Science and Technology Beijing

Two different types of chalcopyrite （pyritic chalcopyrite and porphyry chalcopyrite） were bioleached with AcidithiobaciUus ferrooxidans ATF6. The bioleaching of the pyritic chalcopyrite and porphyry chalcopyrite is quite different. The copper extraction reaches 46.96% for the pyritic chalcopyrite after 48-d leaching, but it is only 14.50% for the porphyry chalcopyrite. Proper amounts of initial ferrous ions can improve the efficiency of copper extraction for the two different types of chalcopyrite. The optimum dosage of ferrous ions for the pyritic chalcopyrite and porphyry chalcopyrite is different. The adsorption of ATF6 on the pyritic chalcopyrite and porphyry chalcopyrite was also studied in this paper. It is found that ATF6 is selectively adsorbed by the two different types of chalcopyrite; the higher adsorption onto the pyritic chalcopyrite than the porphyry chalcopyrite leads to the higher copper dissolution rate of the pyritic chalcopyrite. In addition, the zeta-potential of chalcopyrite before and after bioleaching further confirms that ATF6 is more easily adsorbed onto the pyritic chalcopyrite.

关键词： chalcopyrite bioleaching adsorption functional groups

β-Phase Crystallization of Poly(vinylidene fluoride) in Poly(vinylidene fluoride)/Poly(ethyl methacrylate) Blends

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2019年第1期37卷 94-100,4-7页

作者： Zi-Jie Huang Jing Jiang Gi Xue Dong-shan zhou Department of Polymer Science and Engineering School of Chemistry and Chemical Engineering Key Laboratory of High Performance Polymer Materials and Technology and The State Key Laboratory of Coordination Chemistry Nanjing University School of Physical Science and Technology Xinjiang Key Laboratory and Phase Transitions and Microstructures in Condensed Matters Yili Normal University

The nature of the crystalline phase of poly(vinylidene fluoride)(PVDF) in compatible blends with poly(ethyl methacrylate)(PEMA) was investigated by using X-ray diffraction(XRD), infrared microscopy(IR) and differential scanning calorimetry(DSC). The βphase of PVDF was observed after quenching from the melt and further annealing above the glass transition temperature over a composition range. The PVDF/PEMA blend with weight ratio of 3:2 has formed higher content of PVDF β crystals than others. By taking advantage of fast cooling rate of ultrafast differential scanning calorimeter(UFDSC), the quenching process of blends was modeled and tested simultaneously, and the melting behavior of β crystals in all blends was investigated. Three types of crystallization behavior of βphase PVDF in blends were found after quenching-annealing at different temperatures.

关键词： β-Crystal of PVDF Mesophase PVDF/PEMA blend Ultra-fast scanning calorimetry

Gnetuhainin S, a New Resveratrol Dimer from Gnetum hainanense

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2002年第6期13卷 549-550页

作者： shan zhou Ying Hong WANG Mao LIN Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050

Gnetuhainin S, a new resveratrol dimer, was isolated from the lianas of Gnetum hainanense C. Y. Cheng. Its structure and relative configuration were established on the basis of spectroscopic evidence.

关键词： Gnetuhainin S Gnetum hainanense Gnetaceae resveratrol dimer.

Passive location using CDMA mobile communication system based on repeater equipment

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2008年第2期15卷 32-38页

作者： TIAN Zeng-shan zhou Fei ZHANG Tian-qi Department of Communication and Information Engineering ChongqingUniversity of Posts and Telecommunications Chongqing 400065 China

To overcome the drawback of a short operation range and low-resolution of a passive location system using a civil communication signal, the new idea that utilizes code division multiple access （CDMA） signal and repeater is disposed off. First, the CDMA passive location model and observation function are given, and the error source and error range are analyzed. Subsequently, the CDMA passive location algorithm in a repeater environment is described and simulated. The simulation result shows that the algorithm can provide the location value with high accuracy.

关键词： passive location civil communication signal,location model repeater equipment operation range

Combustion and energy balance of aluminum holding furnace with bottom porous brick purging system

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2012年第1期19卷 200-205页

作者： ZHANG Jia-qi zhou Nai-jun zhou shan-hong School of Energy Science and Engineering Central South UniversityChangsha 410083China College of Aerospace and Material Engineering National University of Defense TechnologyChangsha 410073China Shenyang Aluminum and Magnesium Engineering and Research Institute Shenyang 110001China

For acquiring the details in aluminum holding furnace with bottom porous brick purging system,efforts were performed to try to find out the potential optimal operation *** adopting transient analysis scheme and constant boundary temperature,combustion in the furnace was investigated numerically using computational fluid dynamics(CFD).The predicted gas temperature shows good agreement with the measured results,and the predicted energy distribution of the furnace is consistent with that obtained from energy balance experiment,which confirms the reliability of the numerical *** results show that as the fuel-air mixture temperature rises up from 300 K to 500 K,the energy utilization of the furnace could increase from 34.55% to 37.14%.However,as the excess air coefficient increases from 1.0 to 1.4,energy utilization drops from 34.55% to 29.56%.Increasing the combustion temperature is the most effective way to improve the energy efficiency of the *** reactant temperature and medium excess air coefficient are recommended for high operation performance,and keeping the furnace jamb sealed well for avoiding leakage has to be emphasized.

关键词： aluminum holding furnace combustion flow numerical study computational fluid dynamics

Functional characterization of the catalytic and bromodomain of FgGCN5 in development,DON production and virulence of Fusarium graminearum

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2020年第10期19卷 2477-2487页

作者： WANG Qian-nan HUANG Pan-pan zhou shan-yue The Key Lab of Integrated Crop Pests Management of shandong Province/College of Plant Health and Medicine Qingdao Agricultural UniversityQingdao 266109P.R.China

FgGCN5,a GCN5 homolog in Fusarium graminearum,plays a critical role in hyphal vegetative growth,asexual and sexual reproduction,deoxynivalenol(DON)biosynthesis and plant *** nuclear localized GCN5,four conserved sequence motifs(I-IV)are presented in the catalytic domain and a bromodomain in the *** a lysine acetyltransferase,conserved negatively charged residues are present to neutralize the protons from lysine ***,the role of conserved motifs/domains and residues in FgGCN5 are ***,we generated deletion mutant strains for each the conserved motifs/domains and a glutamate residue 130(E130)replacement *** of each conserved motif in the catalytic domain and replacement of E130 site resulted in manifold defects in hyphae growth,asexual and sexual development,DON biosynthesis,and plant *** defects in the mutant strains were similar to deletion *** deletion of the bromodomain led a significant reduction in DON production and virulence,with no effects on hyphae growth,asexual or sexual ***5 was further found to localize to the nucleus in conidia and hyphae *** conclusion,FgGCN5 encodes a nuclear localized *** conserved motifs in the catalytic domain and E130 are essential for correct functions of the *** conserved bromodomain is impotant for DON production and pathogen *** was the first report to identify the functions of conserved motifs/domains in FgGCN5,which will contribute to our understanding of the mechanism(s)by which FgGCN5 regulates ***.

关键词： FgGCN5 catalytic domain bromodomain DON virulence

A novel glycoside hydrolase 74 xyloglucanase CvGH74A is a virulence factor in Coniella vitis

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2020年第11期19卷 2725-2735页

作者： QIN Jia-xing LI Bao-hua zhou shan-yue The Key Lab of Integrated Crop Pests Management of shandong Province/College of Plant Health and Medicine Qingdao Agricultural UniversityQingdao 266109P.R.China

Grape white rot is a destructive fungal disease occurring ***,Coniella vitis was identified as the predominant pathogen causing this disease in *** the periderms of grape shoots are severely degraded by ***,it was speculated that cell wall-degrading enzymes(CWDEs)might play a key role in the pathogenesis of this ***,this study aimed to examine the hydrolytic activity of the CWDEs of *** results showed that xylanase(Xy)and xyloglucanase(XEG)had high levels of hydrolytic activity both in vitro and in ***,a high-virulence fungal strain exhibited higher levels of Xy and XEG activities compared with a low-virulence *** genome of the fungus was found to harbor two XEG-coding genes CvGH74A and CvGH74B,which belonged to the glycoside hydrolase(GH)74 *** expression level of CvGH74A was found to be high during pathogen ***74A gene deletion mutants were generated using the split-marker *** deletion of CvGH74A decreased both the hydrolytic activities of XEG and Xy and also the ability of the fungus to infect the grape *** differences in the hyphal growth,morphology of colonies,or conidiation were found between theΔCvGH74A mutant strains and the wild-type ***,these results suggested that CvGH74A acted as an important virulence factor,and its enzymatic activity might regulate the virulence of the *** study was novel in reporting that GH74 XEG acted as a virulence factor in ***.

关键词： Coniella vitis GH74 grape white rot virulence xyloglucanase

Exploration of Unbound States by Analytical Continuation in the Coupling Constant Method Within Relativistic Mean Field Theory

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2001年第2期18卷 196-198页

作者： YANG Si-Chun MENG Jie zhou shan-Gui Department of Technical Physics&MOE Key Laboratory for Heavy Ion Physics Peking UniversityBeijing 100871 Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100080 Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000

For the first time,the analytical continuation in the coupling constant method has been combined with the relativistic mean field theory to study the unbound states in spherical *** 1d_(3/2) neutron state in ^(16)O and the 2d_(5/2) and 1g_(9/2) neutron states in ^(48)Ca are taken as *** calculated energies and widths are compared with available data.

关键词： continuation states relativistic