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Structural investigation and luminescent properties of BaZr(BO_3)_2:Eu^(3+) phosphors containing Si

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Chinese Science Bulletin 2010年第29期55卷 3252-3255页

作者： ZHANG ZhongPeng LI guangmin ZHANG XiaoSong XU ShengYan JI Ting LI Lan Insititute of Material Physics Tianjin University of Technology Key Laboratory of Display Materials and Photoelectric Devices Ministry of Education Tianjin Key Laboratory for Optoelectronic Materials and Devices Tianjin 300191 China Department of Fundamental Subjects Tianjin Institute of Urban Construction Tianjin 300384 China Tianjin Xinhua Staff and Workers University Tianjin 300040 China

Si4+-doped BaZr(BO3)2:Eu3+ phosphors are prepared by a conventional solid-state *** influence of Si4+ addition on the charge transfer state of Eu3+-O2- and photoluminescence(PL) properties of BaZr(BO3)2:Eu3+ are *** temperature PL spectra indicated that efficient emission is obtained by Si *** values for the peak-peak ratio(PPR) of BaZr(BO3)2:Eu3+ at higher Si doping concentrations implied that the Eu3+ ion is located in a more asymmetric environment in BaZr0.8Si0.2(BO3)2:Eu3+ than in the undoped *** Judd-Ofelt parameters Ωλ(λ=2,4) were calculated from the PL data,giving results that were consistent with those from the *** maximum radiative quantum efficiency was achieved at a Si doping concentration of 20 mol%.

关键词： Si掺杂铕离子荧光粉发光性能结构调查硅掺杂固相反应电荷转移

Genetic Algorithm for Solving Quadratic Bilevel Programming Problem

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Wuhan University Journal of Natural Sciences 2007年第3期12卷 421-425页

作者： WANG guangmin WAN Zhongping WANG Xianjiai FANG Debin School of Water Resource and Hydropower Wuhan University Wuhan 430072 Hubei China School of Mathematics and Statistics Wuhan UniversityWuhan 430072 Hubei China School of Economics and Management Wuhan UniversityWuhan 430072 Hubei China

By applying Kuhn-Tucker condition the quadratic bilevel programming, a class of bilevel programming, is transformed into a single level programming problem, which can be simplified by some rule. So we can search the optimal solution in the feasible region, hence reduce greatly the searching space. Numerical experiments on several literature problems show that the new algorithm is both feasible and effective in practice.

关键词： quadratic bilevel programming genetic algorithm optimal solution

Design and simulation of self-powered radio frequency identification (RFID) tags for mobile temperature monitoring

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Science China(Technological Sciences) 2013年第1期56卷 1-7页

作者： CHU HeQun WU guangmin CHEN JianMing FEI Fei MAI John D LI Wen J MEMS Laboratory Department of Physics Faculty of Science Kunming University of Science and Technology Department of Mechanical and Biomedical Engineering City University of Hong Kong

This paper presents a design for a self-powered radio frequency identification (RFID) tag with a thin film bulk acoustic reso- nating piezoelectric power supply (PPS), which can be used for portable remote temperature monitoring. We call this system a PPS-RFID for short. The RFID systems have been found to have many applications in the internet of things (IOT) in the past decade. But semi-active RFID tags require an onboard battery which limits their applications in many fields. For these reasons, our research focuses on power sources for the RFID tags. This paper emphasizes the circuit design and simulation of PPS. In our tests, 0.283 mW was generated by PPS at 1 Hz vibration by a 650 N impact force. The results showed that the integrated PPS could supply sufficient power for the designed PPS-RFID tag. The PPS-RFID tag can be widely used for temperature monitoring during mobile transport of perishable items such as medicines or food.

关键词： self-powered radio frequency identification (RFID) piezoelectric temperature monitoring energy harvesting internet of things

Haplotype variations in QTL for salt tolerance in Chinese wheat accessions identified by marker-based and pedigree-based kinship analyses

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The Crop Journal 2020年第6期8卷 1011-1024页

作者： Shizhou Yu Jianhui Wu Meng Wang Weiming Shi guangmin Xia Jizeng Jia Zhensheng Kang Dejun Han State Key Laboratory of Crop Stress Biology for Arid Areas Northwest A&F UniversityYangling 712100ShaanxiChina Molecular Genetics Key Laboratory of China Tobacco Guizhou Academy of Tobacco ScienceGuiyang 550081GuizhouChina State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008JiangsuChina Key Laboratory of Plant Cell Engineering and Germplasm Innovation Ministry of EducationSchool of Life SciencesShandong UniversityJinan 250100ShandongChina Key Laboratory of Crop Gene Resources and Germplasm Enhancement Ministry of Agriculture/The National Key Facility for Crop Gene Resources and Genetic ImprovementInstitute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Most modern wheat cultivars were selected on the basis of yield-related indices measured under optimal fertilizer and irrigation *** climate change,land degradation and salinity caused by sea water encroachment,wheat is increasingly subjected to environmental ***,expanding urbanization increasingly encroaches upon prime agricultural land in countries like China,and alternative cropping areas must be *** of these areas have moderate constraining factors,such as ***,it is important to investigate whether current genetic materials and breeding procedures are maintaining adequate variability to address future problems caused by abiotic *** this study,a panel of 307 wheat accessions,including local landraces,exotic cultivars used in Chinese breeding programs and Chinese cultivars released during different periods since1940,were subjected to a genome-wide association study to dissect the genetic basis of salinity *** marker-based and pedigree-based kinship analyses revealed that favorable haplotypes were introduced in some exotic cultivars as well as a limited number of Chinese landraces from the 1940 ***,improvements in salinity tolerance during modern breeding are not as obvious as that of *** broaden genetic diversity for increasing salt tolerance,there is a need to refocus attention on local landraces that have high degrees of salinity tolerance and carry rare favorable alleles that have not been exploited in breeding.

关键词： Genome-wide association study Linkage disequilibrium Salt tolerance Haplotype tracing Triticum aestivum

Characterizing nitric oxide emissions from two typical alpine ecosystems

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Journal of Environmental Sciences 2019年第3期31卷 312-322页

作者： Fei Lin Chunyan Liu Xiaoxia Hu Yongfeng Fu Xunhua Zheng Rui Wang Wei Zhang guangmin Cao State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC) Institute of Atmospheric Physics Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Northwest Institute of Plateau Biology Chinese Academy of Sciences

portion of alpine meadows has been and will continue to be cultivated due to the concurrent increasing demands for animal-and crop-oriented foods and global ***, it remains unclear how these long-term changes in land use will affect nitric oxide(NO) emission. At a field site with a calcareous soil on the Qinghai-Tibetan Plateau,the authors measured the year-round NO fluxes and related variables in a typically wintergrazed natural alpine meadow(NAM) and its adjacent forage oat field(FOF). The results showed that long-term plow tillage, fertilization and growing forage oats significantly yielded ca. 2.7 times more(p < 0.01) NO emissions from the FOF than the NAM(conservatively 208 vs. 56 g N/(ha·year) on average). The spring freeze–thaw period and non-growing season accounted for 17%-35% of the annual emissions, respectively. The Q10 of surface soil temperature(Ts) was 8.9 in the NAM(vs. 3.8 in the FOF), indicating increases of 24%–93% in NO emissions per 1–3 °C increase. However, the warming-induced increases could be smaller than those due to land use change and management practices. The Tsand concentrations of ammonium, nitrate and water-extractable organic carbon jointly explained 69% of the variance in daily NO fluxes from both fields during the annual period(p < 0.001). This result indicates that temporally and/or spatially distributed NO fluxes from landscapes with calcareous soils across native alpine meadows and/or fields cultivated with forage oats can be predicted by simultaneous observations of these four soil variables.

关键词： Alpine meadow Annual NO fluxes Non-growing season Freeze–thaw period Land use change Global warming

Seismic labeled data expansion using variational autoencoders

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Artificial Intelligence in Geosciences 2020年第1期1卷 24-30页

作者： Kunhong Li Song Chen guangmin Hu Ph.D School of Resources and Environment and Center for Information Geoscience University of Electronic Science and Technology of China(UESTC)Chengdu611731China Center for Information Geoscience UESTCChengdu611731China

Supervised machine learning algorithms have been widely used in seismic exploration processing,but the lack of labeled examples complicates its ***,we propose a seismic labeled data expansion method based on deep variational Autoencoders(VAE),which are made of neural networks and contains two partsEncoder and *** of training samples leads to overfitting of the *** training the VAE with whole seismic data,which is a data-driven process and greatly alleviates the risk of *** Encoder captures the ability to map the seismic waveform Y to latent deep features z,and the Decoder captures the ability to reconstruct high-dimensional waveform Yb from latent deep features ***,we put the labeled seismic data into Encoders and get the latent deep *** can easily use gaussian mixture model to fit the deep feature distribution of each class labeled *** resample a mass of expansion deep features z* according to the Gaussian mixture model,and put the expansion deep features into the decoder to generate expansion seismic *** experiments in synthetic and real data show that our method alleviates the problem of lacking labeled seismic data for supervised seismic facies analysis.

关键词： Deep learning Variational autoencoders Data expansion

Optimization and Effects of Catalytic Ozonation of Actual Phenolic Wastewater by CuO/Al2O3

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China Petroleum Processing & Petrochemical Technology 2019年第3期21卷 74-80页

作者： Ma Rui Liu guangmin Feng Sihui Qiu Xiaoyu Zhang Yanqing Xia Shumei Xue Jianliang College of Materials Science and Chemical Engineering Harbin Engineering UniversityHarbin 150001 College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590

In order to improve the ability of ozone to catalyze the degradation of phenolic pollutants in wastewater,the CuO/Al2O3 catalysts was prepared by the impregnation precipitation method and an ozone catalytic oxidation system was *** actual phenolic sewage was used as the treatment *** the reaction conditions of the system were optimized,and the treatment effect was determined,while the non-catalytic system was used as a control *** the same time,the influence of salt and ammonia nitrogen related water quality on the system was *** optimal reaction conditions for the treatment of phenolic wastewater covered:a catalyst dosage of 30 g/L,an ozone flow rate of 0.3 m3/h,a pH value of 8.80,and a reaction time of 15 *** these conditions,the phenol and COD removal rates of the system reached 98.7%and 49.4%,respectively,which were by 31.3 percentage points and 16.2 percentage points higher than that of the ozonation system *** salt and ammonia nitrogen in the sewage can reduce the oxidation effect of the *** the salinity reached 10%and the ammonia nitrogen content reached 13 000 mg/L,the removal rate of phenol could be reduced by about 20%.The results of this paper have a reference value for phenol wastewater treatment engineering.

关键词： CuO/Al2O3 catalyst catalytic ozonation phenolic wastewater reaction conditions water quality factor

Transfer of small chromosome fragments of Agropyron elongatum to wheat chromosome via asymmetric somatic hybridization

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Science China(Life Sciences) 2004年第5期47卷 434-441页

作者： WANG Jing,XIANG Fengning,XIA guangmin & CHEN Huimin School of Life Sciences,Shandong University,Jinan 250100,China 1. School of Life Sciences Shandong University 250100 Jinan China

The chromosome constitution of hybrids and chromation patterns of Agropyro-nelelongatum(Host)Neviski in F5 somatic hybrid lines Ⅱ -1-3 and l-1-9 between Triticum aesti-vum *** *** were *** on the statistic data of pollen omther cells,F5 l-1-9 and Ⅱ-1-3 had 20—21 bivalents with a frequency of 84.66% and 85.28%,of which,89.83% and 89.57% were ring *** result indicated that both hybrid lines were basically stable in the chromosome constitution and *** analysis showed that the two hybrids contained biparental and integrated ***(Genome in situ hybridization)revealed that in the form of small chromosome segments,*** chromatin was scattered on 4—6 wheat chromo-somes near by the region of centromere and telomere in the two hybrid *** analysis in-dicated that *** DAN segments were distributed on the 2A,5B,6B and 2D wheat chromosomes in the hybrids,which was in accordance with the GISH results that small-segments intercalated poly-site.

关键词： Triticum aestivum L.,Agropyron elongatum(Host)Neviski,F5 somatic hybrid lines,small chromosome segment translocation,in situ hybridization,simple sequence repeat.

Rhodauricanol A, an analgesic diterpenoid with an unprecedented5/6/5/7 tetracyclic system featuring a unique16-oxa-tetracyclo[11.2.1.0^(1,5).0^(7,13)]hexadecane core from Rhododendron dauricum

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Chinese Chemical Letters 2023年第4期34卷 183-187页

作者： Yuanyuan Feng Suqin Zha Hanqi Zhang Biao Gao Guijuan Zheng Pengfei Jin Yingyi Chen guangmin Yao Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation School of PharmacyTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China

A novel diterpenoid with an unprecedented 5/6/5/7 tetracyclic system, rhodauricanol A(1), five new grayanane-derived diterpenoids, dauricanols A-E(2-6), and five known ones(7-11) were isolated from the flowers of Rhododendron dauricum. Rhodauricanol A(1) possesses a unique 5/6/5/7 tetracyclic ring system featuring a 16-oxa-tetracyclo[11.***.1.0^(1,5).0^(7,13)]hexadecane core. Dauricanols A-C(2-4) are the first1,3-dioxolane conjugates of grayanane diterpenoids and 5-hydroxymethylfurfural and vanillin, respectively, and dauricanols D(5) and E(6) represent the first examples of 6-deoxy-1,5-seco-grayanane diterpenoids. Their structures were determined by spectroscopic methods, quantum chemical calculation including ^(13)C NMR-DP4+ analysis and ECD calculation, and single-crystal X-ray diffraction analysis. Plausible biosynthetic pathways for 1-4 were proposed. All the isolates showed significant analgesic activities,and dauricanols B(3) and C(4) showed more potent analgesic activities than the positive control, morphine.

关键词： Rhododendron dauricum L.(Ericaceae) Diterpenoids Single-crystal X-ray diffraction Biosynthetic pathways Analgesics