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Experimental Study and Property Analysis of Seal-filling Hydrogel Material for Hermetic Wall in Coal Mine

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Journal of Wuhan university of Technology(Materials Science) 2010年第1期25卷 152-155页

作者：罗振敏 School of Energy Engineering Key Western China Laboratory for Coal Exploitation Development and Safety for Ministry of EducationXi'an University of Science and Technology

The effects of monomer, crosslinker, and accelerator content on the mechanical property of seal-filling hydrogel material for building hermetic wall were analyzed through a series of single-direction compression experiments. Grey predication by GM（1,1） model was also used to analyze the persistent property of hydrogel material. The results showed that the elastic modulus and strength of seal-filling hydrogel increased, and the elastic tended to reduce with the growth of monomer and crosslinker content. In comparison, the effect of accelerator content was diametrically opposed. At the same time, staggered change of elastic modulus occurred and its demarcation point generally appeared at the point of 50% of vertical deformation value. In addition, through the testing of correlation degree, the accuracy of the grey prediction model to test the persistent stability of hydrogel material can be proved. As the concentration of hydrophilic monomer in hydrogel material increased, the stability was improved. The energy originated from explosion shock wave can be absorbed by seal-filling hydrogel through deformation.

关键词： hermetic wall hydrogel mechanical property persistent stability

Characteristics of stable L-band SFS using dual-forward synchronous pumping technique

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Chinese Optics Letters 2009年第7期7卷 568-571页

作者：王秀琳黄文财许惠英蔡志平 Department of Physics Xiamen University Department of Physics Jimei University Department of Electronic Engineering Xiamen University

We investigate the characteristics of the dual-forward synchronously pumped L-band erbium-doped su- perfiuorescent fiber source （SFS）. The effects of pump ratio and fiber length arrangements on the output characteristics of the L-band SFS in terms of mean wavelength, spectral linewidth, and output power are analyzed. It is shown that the optimized pump ratio and fiber length arrangements provide broadening spectral linewidth and enhanced pumping efficiency, while the synchronous pump ensures stable mean wavelength operation. A new single-forward pumping scheme with a section of unpumped fiber is pro- posed to achieve a mean wavelength stable L-band SFS with a broadening linewidth of 50.4 nm and a pumping efficiency of 33.5%.

关键词： Erbium Fibers Linewidth

Hydrothermal growth of well-aligned TiO_2 nanorod arrays: Dependence of morphology upon hydrothermal reaction conditions

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Rare Metals 2010年第3期29卷 286-291页

作者： LI Yuxiang ZHANG Mei GUO Min WANG Xidong Department of Physical Chemistry University of Science and Technology Beijing Beijing 100083 China College of Engineering Peking University Beijing 100871 China

Well-aligned TiO2 nanorod arrays （TNAs） were prepared on pretreated quartz substrates via hydrothermal *** effect of the different preparation conditions on the growth morphologies of TNAs was systematically investigated by X-ray diffraction （XRD） and field-emission scanning electron microscopy （FE-SEM）.The photocatalytic properties were tested by photodegradation of a methyl blue *** is demonstrated that the hydrothermal reaction conditions,such as precursor concentration,hydrothermal reaction temperature,and hydrothermal reaction times,can greatly affect the growth of *** the preparation process,TNAs with 2 μm in length and 140-170 nm in diameter and well-aligned orientation have been successfully *** photocatalytic experiment results indicate that TNAs have much better photocatalytic activity than TiO2 nanoparticles.

关键词： titanium dioxide nanorod arrays hydrothermal method photocatalyst

Effect of BCP ultrathin layer on the performance of organic light-emitting devices

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Optoelectronics Letters 2008年第5期4卷 317-320页

作者： WANG Hong YU Jun-sheng LI Lu TANG Xiao-qing JIANG Ya-dong School of Optoelectronic Information State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China

Based on conventional double layer device, triple layer organic light-emitting diodes (OLEDs) with two heterostructures of indium-tin oxide (ITO)/N,N'-diphenyl-N,N'-bis(1-naphthyl)(1,1'-biphenyl)-4,4'-diamine(NPB)/2,9-dimethyl-4,7-diphenyl- 1,10-phenanthroline (BCP)/ 8-Hydroxyquinoline aluminum (Alq3)/Mg:Ag using vacuum deposition method have been fabricated. The influence of different film thickness of BCP layer on the performance of OLEDs has been investigated. The results showed that when the thickness of the BCP layer film gradually varied from 0.1 nm to 4.0 nm, the electrolumines- cence (EL) spectra of the OLEDs shifted from green to greenish-blue to blue, and the BCP layer acted as the recombination region of charge carriers related to EL spectrum, enhancing the brightness and power efficiency. The power efficiency of OLEDs reached as high as 7.3 lm/W.

关键词：电致发光器件超薄层 OLEDs 异质结构

Proteome changes in the plasma of Papilio xuthus (Lepidoptera:Papilionidae):effect of parasitization by the endoparasitic wasp Pteromalus puparum (Hymenoptera:Pteromalidae)

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Journal of Zhejiang university-Science B(Biomedicine & Biotechnology) 2009年第6期10卷 445-453页

作者： Jia-ying ZHU Gong-yin YE Qi FANG Cui HU State Key Laboratory of Rice Biology Institute of Insect Sciences Zhejiang University Hangzhou 310029 China

Although the biochemical dissection of parasitoid-host interactions is becoming well characterized, the molecular knowledge concerning them is minimal. In order to understand the molecular bases of the host immune response to parasitoid attack, we explored the response of Papilio xuthus parasitized by the endoparasitic wasp Pteromalus puparum using proteomic approach. By examining the differential expression of plasma proteins in the parasitized and unparasitized host pupae by two-dimensional (2D) electrophoresis, 16 proteins were found to vary in relation to parasitization compared with unparasitized control samples. All of them were submitted to identification by mass spectrometry coupled with a database search. The modulated proteins were found to fall into the following functional groups: humoral or cellular immunity, detoxification, energy metabolism, and others. This study contributes insights into the molecular mechanism of the relationships between parasitoids and their host insects.

关键词： Proteomics Plasma Parasitism Immune response Pteromaluspuparum Papilio xuthus

Fractal analysis of polyferric chloride-humic acid(PFC-HA) flocs in different topological spaces

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Journal of Environmental Sciences 2009年第1期21卷 41-48页

作者： WANG Yili LU Jia DU Baiyu SHI Baoyou WANG Dongsheng College of Environmental Science and Engineering The Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry University Beijing 100083 China. State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beifing 100085 China

The fractal dimensions in different topological spaces of polyferric chloride-humic acid （PFC-HA） flocs, formed in flocculating different kinds of humic acids （HA） water at different initial pH （9.0, 7.0, 5.0） and PFC dosages, were calculated by effective densitymaximum diameter, image analysis, and N2 absorption-desorption methods, respectively. The mass fractal dimensions （De） of PFC-HA floes were calculated by bi-logarithm relation of effective density with maximum diameter and Logan empirical equation. The Df value was more than 2.0 at initial pH of 7,0, which was 11% and 13% higher than those at pH 9.0 and 5.0, respecively, indicating the most compact flocs formed in flocculated HA water at initial pH of 7.0. The image analysis for those flocs indicates that after flocculating the HA water at initial pH greater than 7.0 with PFC flocculant, the fractal dimensions of D2 （logA vs. logdL） and D3 （logVsphere vs. logdL） of PFC-HA floes decreased with the increase of PFC dosages, and PFC-HA floes showed a gradually looser structure. At the optimum dosage of PFC, the D2 （logA vs. logdL） values of the flocs show 14%-43% difference with their corresponding Dr, and they even had different tendency with the change of initial pH values. However, the D2 values of the floes formed at three different initial pH in HA solution had a same tendency with the corresponding Df. Based on fractal Frenkel-Halsey-HiU （FHH） adsorption and desorption equations, the pore surface fractal dimensions （Ds） for dried powders of PFC-HA flocs formed in HA water with initial pH 9.0 and 7.0 were all close to 2.9421, and the Ds values of flocs formed at initial pH 5.0 were less than 2.3746. It indicated that the pore surface fractal dimensions of PFC-HA floes dried powder mainly show the irregularity from the mesopore-size distribution and marcopore-size distribution.

关键词： polyferric chloride-humic acid (PFC-HA) flocs topological spaces fractal dimensions effective density image analysis pore surface fractal

Investigation of nanometer-scale films using low angle Xray reflectivity analysis in IPOE

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Optoelectronics Letters 2007年第2期3卷 88-90页

作者： WANG Zhan-shan XU Yao WANG Hong-chang ZHU Jing-tao ZHANG Zhong WANG Feng-li CHEN Ling-yan Institute of Precision Optical Engineering Tongji University Shanghai 200092 China

The X-ray low angle reflectivity measurement is used to investigate single and bilayer films to determine the parameters of nanometer-scale structures,three effectual methods are presented by using X-ray reflectivity analysis to provide an accurate estimation of the nanometer film structures. The parameters of tungsten (W) single layer, such as the material density, interface roughness and deposition rate, were obtained easily and speedily. The base metal layer was introduced to measure the profiles of single low Z material film. A 0.3 nm chromium (Cr) film was also studied by low angle reflectivity analysis.

关键词： IPOE 纳米级薄膜 X线反射率分析多层结构参数

Phase regulated suppression and enhancement switches of four-wave mixing and fluorescence

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Frontiers of physics 2014年第2期9卷 153-156页

作者： Zhi-Guo Wang Peng Ying Pei-Ying Li Hua-Yan Lan He-Qing Huang Hao Tian Jian-Ping Song Yan-Peng Zhang Key Laboratory for Physical Electronics and Devices of the Ministry of Education Shaanxi Key Lab of Information Photonic Technique Xi'an Jiaotong University Xi'an 710049 China

We experimentally study the phase regulated switch between elcctromagnctically induced trans- parency and electromagmetically induced absorption in probe transmission signal and the conver- sion between enhancement and suppression in four-wave mixing and fluorescence signals for the first time. By changing the relative phase, electromagnetically induced transparency can be eonverted into electromagnetically induced absorption. In this process, the conversion from suppression to enhancement is also obtained in four-wave mixing and fluorescence signals. This research can be applied in non-linear optical device like optical switch and optical wavelength convertor.

关键词： four-wave mixing fluorescence phase regulation enhancement and suppression

Minimization of infiuence by the drooping eyelid in extracting pupil center for eye tracking systems

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Progress in Natural Science:Materials International 2008年第9期 1155-1159页

作者： Xiaopeng Wei a,b,, Dongsheng Zhou a, Qiang Zhangb,, Boxiang Xiaoa a School of Mechanical Engineering, Dalian university of Technology, Dalian 116024, China b Liaoning Key Laboratory of Intelligent Information Processing, Dalian university, Dalian 116622, China

Precise pupil center detection is an important factor for gaze tracking in video-oculography (VOG) *** methods per-form well to extract the features when the area of pupil in eye image is clear, whereas, interferences, such as eyelashes, corneal refiection etc., will lead to a low success *** main reason is the closure of *** this paper, a systemic 3D transformation algorithm is proposed to accurately ascertain the pupil center, in spite of the complicating factors mentioned *** show the good per-formance of our *** the pupil center could be extracted accurately, even though only 25% of the pupil is visible.

关键词： Pupil center VOG 3D transformation Projection transformation Least squares