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Development and evaluation of an online monitoring single-particle optical particle counter with polarization detection

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Journal of Environmental Sciences 2024年第4期138卷 585-596页

作者： Weijie Yao Xiaole Pan Yu Tian Hang Liu Yuting Zhang shandong Lei Junbo Zhang Yinzhou Zhang LinWu Yele Sun Zifa Wang State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

We developed a single-particle optical particle counter with polarization detection(SOPC)for the real-time measurement of the optical size and depolarization ratio(defined as the ratio of the vertical component to the parallel component of backward scattering)of atmospheric particles,the polarization ratio(DR)value can reflect the irregularity of the *** SOPC can detect aerosol particles with size larger than 500 nm and the maximum particle count rate reaches~1.8×10^(5)particles per *** SOPC uses a modulated polarization laser to measure the optical size of particles according to forward scattering signal and the DR value of the particles by backward S and P signal *** sampling rate of the SOPC was 106#/(sec·channel),and all the raw data were processed *** calibration curve was obtained by polystyrene latex spheres with sizes of 0.5-10μm,and the average relative deviation of measurement was 3.96% for sub 3μm particles.T-matrix method calculations showed that the DR value of backscatter light at 120°could describe the variations in the aspect ratio of particles in the above size *** performed insitu observations for the evaluation of the SOPC,the mass concentration constructed by the SOPC showed good agreement with the PM_(2.5)measurements in a nearby state-controlled monitoring *** instrument could provide useful data for source appointment and regulations against air pollution.

关键词： Instrument development Single particle detection Measurement uncertainty Optical simulation Mass concentration

A　Fast　Recursive　Algorithm　for　Positive　and　Inverse　in　Damped　Wave　Equation　Problems

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Systems Science and Systems Engineering 1994年第4期4卷 357-362页

作者： QIU Zhongfang(shandong Institute of Architecture and Engineering,jinan,250014,china)

Based on the damped wave equation,the damped wave equation for seismic exploration is given for the study on evaluation problem of stratum acoustic impedance by the seismic data *** applying Cauchy Problem instead of mixed problem in the process Of identifying acoustic impedance,we for give a fast identification algorithm of recurtive layer by *** order to avoid the accumulation of errors while identifying,the method of removing errors layer by layer is *** using the principle of Pulse Variation and even under the circumstance of big noise,we can identify the structure of stratum clearly.

关键词： damped wave equation impedance identification seismic exploration Cauchy Problem principle of Pulse Variation.

Cubic surface fitting to image by combination

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Science china(Information Sciences) 2010年第7期53卷 1287-1295页

作者： LI XueMei1, ZHANG CaiMing1,2, YUE YiZhen1 & WANG KunPeng1 1School of Computer Science and Technology, shandong University, jinan 250101, china 2School of Computer Science and Technology, shandong Economics University, jinan 250014, china School of Computer Science and Technology Shandong University Jinan China School of Computer Science and Technology Shandong Economics University Jinan China

We present a new method for constructing a fitting surface to image data. The new method is based on a supposition that the given image data are sampled from an original scene that can be represented by a surface defined by piecewise quadratic polynomials. The surface representing the original scene is known as the original surface in this paper. Unlike existing methods, which generally construct the fitting surface to the original surface using image data as interpolation data, the new method constructs the fitting surface using the image data as constraints to reverse the sampling process, which improves the approximation precision of the fitting surface. Associated with each data point and its near region, the new method constructs a quadratic polynomial patch locally using the sampling formula as constraint. The quadratic patch approximates the original surface with a quadratic polynomial precision. The fitting surface which approximates the original surface is formed by the combination of all the quadratic polynomial patches. The experiments demonstrate that compared with Bi-cubic and Separable PCC methods, the new method produced resized images with high precision and good quality.

关键词： surface fitting quadratic polynomial image resizing reversing

The incorporation of C_(60) in cavities of 5,10,15,20-tetra-4-oxy(2-stearic acid)phenyl porphyrin in LB film

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Chinese Journal of Chemistry 1995年第5期13卷 415-422页

作者： LIU, Hong-Guo FENG, Xu-Sheng YANG, Kong-ZhangInstitute of Colloid and Interface Chemistry, shandong University, jinan, shandong 250100, chinaCHENG, Chuan-Fu LI, Jian Department of Physics, shandong Normal University, jinan, shandong 250014, chinaLIANG, Wei-AnDepartment of Chemistry, shandong University, jinan, shandong 250100, china Institute of Colloid and Interface Chemistry Shandong University Jinan Shandong 250100 China Department of Chemistry Shandong University Jinan Shandong 250100 China

The structure and properties of mixed monolayer or LB film of 5,10,15,20-tetra-4-oxy(2-stearic acid)phenyl porphyrin/C60 were studied. A isotherms and small angle X-ray diffraction (SAXD) results show that C60 molecules were incorporated into the cavities of por-phyrin molecules in mixed monolayer and LB film . UV-vis spectra of mixed LB films show that the absorption intensity of porphyrin varied compared with pure porphyrin film, probably arising from the interactions between C60 and porphyrin ring. C60 molecules in mixed systems are well-dispersed. The TPP(CO2H)/C60 mixed LB film is a kind of two-dimensional host-guest system.

关键词： C60 LB film porphyrin

Present Development Situation of Transgenic Crops and Effect on Ecological Environment

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Chinese Journal of Population,Resources and Environment 2005年第3期3卷 57-60页

作者： Wen Wujun 1 & Liang Hongming 2 1 Research Center for Sustainable Development of shandong Province, jinan 250014, china 2 Yingda Science and Technology Co. Ltd., Luneng Group, jinan 250001, china Research Center for Sustainable Development of shandong Province Jinan 250014 China Yingda Science and Technology Co. Ltd Luneng Group Jinan 250001 China

The present development situation of transgenic crops and their effect on ecological environment are introduced in the paper. Some relevant strategies for their future and how to control the risks of ecological enviro... 详细信息

关键词： transgenic crop ecological environment present conditions effect

Cloning,Sequencing and Expression Analysis of the First Cellulase Gene Encoding Cellobiohydrolase 1 from a Cold-adaptive Penicillium chrysogenum FS010

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Acta Biochimica et Biophysica Sinica 2007年第2期39卷 101-107页

作者： Yunhua HOU~(1,2) Tianhong WANG~1 Hao LONG~1 and Huiynan ZHU~(1,2) ~1State Key Laboratory of Microbial Technology,shandong University,jinan 250100,china ~2Department of Food and Biologic Engineering,shandong Institute of Light Industry,jinan 250323,china State Key Laboratory of Microbial Technology Shandong University Jinan 250100 China Department of Food and Biologic Engineering Shandong Institute of Light Industry Jinan 250323 China

A cellobiohydrolase 1 gene (cbhl) was cloned from Penicillium chrysogenum FS010 by amodified thermal asymmetric interlaced polymerase chain reaction (TAIL-PCR).DNA sequencing showsthat cbhl has an open reading frame of 1590 bp, encoding a putative protein of 529 amino acid *** amino acid sequence revealed that CBHI has a modular structure with a predicted molecular massof 56 kDa and consists of a fungal type carbohydrate binding module separated from a catalytic domain bya threonine rich linker *** putative gene product is homologous to fungal cellobiohydrolases inFamily 7 of the glycosyl hydrolases.A novel cbhl promoter (1.3 kb) was also cloned and sequenced,whichcontains seven putative binding sites (5'-SYGGRG-3') for the carbon catabolite repressor *** ofvarious carbon sources to the cbhl transcription of *** was examined by Northern analysis,suggesting that the expression of cbhl is regulated at transcriptional *** cbhl gene in cold-adaptivefungus *** was expressed as an active enzyme in Saccharomyces cerevisiae *** recombinantCBHI accumulated intracellularly and could not be secreted into the medium.

关键词： Penicillum chrysogenum cellobiohydrolase TAIL-PCR promoter of cbh1

Study on Human Capital Valve Quantity Model and Investment Featuers

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Chinese Journal of Population,Resources and Environment 2005年第1期3卷 49-54页

作者： Chen Peian, Li Yujiang & Li Zhen Population, Resources and Environment College, shandong Normal University, jinan shandong 250014, china Population Resources and Environment College Shandong Normal University Jinan Shandong 250014 China

In this paper, human capital is considered a kind of goods in terms of investment. Basic consumption and profit margin are the two important components of human capital goods value. Compared with that of the material capital, the human capital consumption has the following features. The importance of human capital investment determined by the supply-demand mechanism, is growing gradually; The course of investment and return takes a long period of time; Human capital is characterized by strong technicality and weak negotiability; The investment profit margin is changeable and discriminating.

关键词： human capital value measure profit margin

Repetitious-Hot-Pressing Technique in Hot-Pressing Process

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Journal of Materials Science & Technology 2003年第5期19卷 486-488页

作者： Shixue SONG, Xing AI, Wei GAO and Jun ZHAO1)School of Mechanical Engineering, shandong University, jinan 250061, china2)School of Science, jinan University, jinan 250022, china School of Mechanical Engineering Shandong University Jinan 250061 China School of Science Jinan University Jinan 250022 China

A new pressing method was proposed for hot-pressing process. Experimental results indicated that the porosity in Al2O3/TiC/ Ni/Mo (hereafter called AI2O3/TiC composite) composite compacts decreases by 6% after adopting this new technique, compared to traditional hot-pressing technique under the same sintering temperature. The flexural strength and Vicker hardness increase from 883 MPa to 980 MPa and from 16 GPa to 21.1 GPa, respectively. A theoretical model was given to analyze the densification mechanism of the composite in the process of repetitious-hot-pressing.

关键词： Hot-pressing sintering Repetitious-hot-pressing sintering Composite

On the Distribution of Integral Ideals and Hecke Grssencharacters

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Chinese Annals of Mathematics,Series B 2010年第3期31卷 385-392页

作者： Huixue LAO School of Mathematical Sciences Shandong Normal University Jinan 250014 China.

The author uses analytic methods to study the distribution of integral ideals and Hecke Grossencharacters in algebraic number fields. Nowak＇s results on the distribution of integral ideals, and Chandrasekharan and G... 详细信息

关键词： Dedekind zeta-function Integral ideal Grossencharacters