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Synergistic Effect in Mixed Capillary Gas Chromatographic Stationap Phases Containing Heptakis(2,3,6-tri-o-pentyl)-β-cyclodextrin and Dibenzo-18-crown-6

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Chinese Chemical Letters 1999年第3期10卷 223-226页

作者： Li Ming YUAN Ruo Nong FU Xue Xian CHEN shi Hong GUl Rong Ji DAI (Chemistry Department of Yunnan Normal University.kunming 650092)(Department of Chemical Engineering.Beijing institute of Technology,BEijing 100081)(Solar Energy Research Institute ofyunna

used－silical capillary columns containing heptakis（2、3、6－tri－o－pentyl）-β-cyclodextrinand dibenzo-18-crown-6 were *** studying the selectivity of mixed stationary phases forsome solute *** well as comparing with the heptakis（2．3、6-tri-O-pentyl）-β-cyclodextrin and thedibenzo-18-crown-6 used as individual stationary phase、the synergistic effects were *** effects were affected by the column *** ratio and linear velocity of carrier gas．

关键词： Gas chromatography mixed stationary phase synergistic effect heptakis(2.3.6-tri-o-pentyl)-β-cyclodextrin dibenzo-18-crown-6

Improved Optimal Duty Model Predictive Current Control Strategy for PMSM

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Chinese Journal of Electrical Engineering 2022年第3期8卷 133-141页

作者： Dingdou Wen Jie Yuan Yang Zhang Chuandong shi School of Electrical and Information Engineering Hunan University of TechnologyZhuzhou 412007China

To further improve the steady-state performance of the conventional dual vector model predictive current control(MPCC),an improved optimal duty MPCC strategy for permanent magnet synchronous motor(PMSM)is *** strategy is realized by selecting an optimal voltage vector combination and its duration from the five basic voltage vector combinations,followed by acting on the *** five combinations are:the combination of the optimal voltage vector at the previous moment and basic voltage vector with an angle difference of 60°;the combination of the optimal voltage vector at the previous moment and basic voltage vector with an angle difference of-60°;the combination of the aforementioned three basic voltage vectors with the zero *** results indicate that the method effectively reduces the stator current ripple without increasing the calculational ***,it improves the steady-state performance of the system without altering the dynamic performance of the system.

关键词： Model predictive current control improved optimal duty optimal voltage vector combination steady-state performance PMSM

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原发性肝癌的基因治疗载体的研究

绍兴文理学院学报（自然科学版） 2003年第10期23卷 62-64,67页

作者：施国明昆明医学院附属第二医院，云南昆明650032

就近年国内外原发性肝癌的基因治疗载体研究如分类、调控、存在问题和展望作一综述．

关键词：原发性肝癌基因治疗载体

Characteristics of chemical components in PM2.5 at a plateau city, South-west China

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Frontiers of Environmental Science & Engineering 2016年第5期10卷 97-105页

作者： Jianwu shi Xiang DING Yue ZHOU Ran YOU Lu HUANG Jiming HAO Feng XIANG Jian YANG Ze shi Xinyu HAN Ping NING Faculty of Environmental Science and Engineering Kunming University of Science and Technology Kunming 650500 China School of Environment Tsinghua University Beijing 100084 China Yunnan Environmental Monitoring Center Kunming 650000 China kunming Environmental Monitoring Center Kunming 650228 China

A sampling campaign including summer, autumn and winter of 2014 and spring of 2015 was accomplished to obtain the characteristic of chemical components in PM2.5 at three sites ofkunming, a plateau city in South-west China. Nine kinds of water-soluble inorganic ions （WSI）, organic and element carbon （OC and EC） in PM2.5 were analyzed by ion chromatography and thermal optical reflectance method, respectively. Results showed that the average concentrations of total WSI, OC and EC were 22.85±10.95 μg.m -3, 17.83±9.57 μg.m-3 and 5.114-4.29 μg.m-3, respectively. They totally accounted for 53.0% of PM2.5. Secondary organic and inorganic aerosols （SOA and SIA） were also assessed by the minimum ratio of OC/EC, nitrogen and sulfur oxidation ratios. The annual average concentrations of SOA and SIA totally accounted for 28.3% of the PM2.5 concentration. The low proportion suggested the primary emission was the main source of PM2.5 in kunming. However, secondary pollution in the plateau city should also not be ignorable, due to the appropriate temperature and strong solar radiation, which can promote the atmospheric photochemical reactions.

关键词： PM2.5 Plateau city Organic carbon Element carbon Inorganic ions Secondary components

Detecting micro-blog user interest communities through the integration of explicit user relationship and implicit topic relations

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Science China(Information Sciences) 2017年第9期60卷 64-77页

作者： Yu QIN Zhengtao YU Yanbing WANG Shengxiang GAO Linbin shi Institute of Information Engineering and Automation Kunming University of Science and Technology Key Laboratory of Intelligent Information Processing Kunming University of Science and Technology

In order to effectively utilize the explicit user relationship and implicit topic relations for the detection of micro-blog user interest communities, a micro-blog user interest community(MUIC) detection approach is proposed. First, through the analysis of the follow relationship between users, we have defined three types of such relationships to construct the user follow-ship network. Second, taking the semantic correlation between user tags into account, we construct the user interest feature vectors based on the concept of feature mapping to build a user tag based interest relationship network. Third, user behaviors, such as reposting, commenting, replying, and receiving comments from others, are able to provide certain guidance for the extraction of micro-blog topics. Hence, we propose to integrate the four mentioned user behaviors that are considered to provide guidance information for the traditional latent Dirichlet allocation(LDA) model. Thereby, in addition to the construction of a topic-based interest relationship network, a guided topic model can be built to extract the topics in which the user is interested. Finally, with the integration of the afore-mentioned three types of relationship network, a micro-blog user interest relationship network can be created. Meanwhile, we propose a MUIC detection algorithm based on the contribution of the neighboring nodes. The experiment result proves the effectiveness of our approach in detecting MUICs.

关键词： feature mapping implicit topic guided topic model contribution of the neighboring nodes

Steel ladle exchange models during steelmaking and continuous casting process

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Journal of Iron and Steel Research International 2017年第6期24卷 617-624页

作者： Bang-fu Huang Nai-yuanTian Zhe shi Zhi-wei Ma Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 YunnanChina Clean Metallurgy Key Laboratory of Complex Iron Resources Kunming 650093 Yunnan China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

The models and influencing factors of steel ladles exchange during the steelmaking and continuous casting process of H steel plant were investigated. Based on analysis of the operation process and turnover time of steel ladles, relationship models for the turnover number, turnover rate, continuous casting number, number of ladles with additional turnover, and number of ladles without additional turnover were built. The turnover rules of steel ladles for one basic oxygen furnace （BOF） matching one continuous caster （CC） and two BOFs matching two CCs modes were simulated by using a Gantt chart. The models of steel ladle exchange were proposed for casting of a single CC and overlapping casting of two CCs. By analyzing the influencing factors, the following conclusions were drawn. The exchange ladle should not have the task of transporting liquid ste^l in the CC that stops casting earli- er. The end time of the empty ladle in the CC that stops casting earlier should be earlier than the start time of the full ladle in the CC that stops casting later. After evaluating the factors influencing the start casting time, turnover cycle, casting time, continuous casting number, and overlapping time, a prioritization scheme of steel ladle exchange was proposed based on the steel grade. First, the turn- over cycle and single heat casting time were determined; based on these, a reasonable ladle turnover number was calculated. Second, the turnover number and continuous casting number were optimized for maximizing the number of ladles without additional turnover. Lastly, to reduce the casting number during the overlapping time to be lower than the turnover number, the overlapping time was shortened.

关键词： SteelmakingContinuous castingSteel ladleExchange modelTurnover optimizationProduction scheduling

Leaf physiological and anatomical responses of two sympatric Paphiopedilum species to temperature

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Plant Diversity 2022年第1期44卷 101-108页

作者： Jing-Qiu Feng Ji-Hua Wang shi-Bao Zhang Key Laboratory of Economic Plants and Biotechnology Yunnan Key Laboratory for Wild Plant ResourcesKunming Institute of BotanyChinese Academy of SciencesKunming650201YunnanChina University of Chinese Academy of Sciences Beijing100049China Flower Research Institute of Yunnan Academy of Agricultural Sciences Kunming650205YunnanChina

Paphiopedilum dianthum and *** are two endangered orchid species,with high ornamental and conservation *** are sympatric species,but their leaf anatomical traits and flowering period have significant ***,it is unclear whether the differences in leaf structure of the two species will affect their adaptabilities to ***,we investigated the leaf photosynthetic,anatomical,and flowering traits of these two species at three sites with different temperatures(kunming,16.7±0.2°C;Puer,17.7±0.2°C;Menglun,23.3±0.2°C)in southwest *** with those at Puer and kunming,the values of light-saturated photosynthetic rate(Pmax).stomatai conductance(gs),leaf thickness(LT),and stomatai density(SD)in both species were lower at *** values of Pmax,gs,仃,adaxial cuticle thickness(CTad)and SD in *** were higher than those of *** at the three *** with ***,there were no flowering plants of *** at *** results indicated that both species were less resistance to high temperature,and *** had a stronger adaptability to high-temperature than *** findings can provide valuable information for the conservation and cultivation of Paphiopedilum species.

关键词： Conservation Cultivation High-temperature Leaf anatomy Paphiopedilum Photosynthesis

Searching for AGN and pulsar candidates in 4FGL unassociated sources using machine learning

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Research in Astronomy and Astrophysics 2021年第1期21卷 143-157页

作者： Ke-Rui Zhu shi-Ju Kang Yong-Gang Zheng Department of Physics Yunnan Normal UniversityKunmingYunnan650092China School of Physics and Electrical Engineering Liupanshui Normal UniversityLiupanshuiGuizhou553004China

In the fourth Fermi Large Area Telescope source catalog(4 FGL),5064γ-ray sources are reported,including 3207 active galactic nuclei(AGNs),239 pulsars,1336 unassociated sources,92 sources with weak association with blazars at low Galactic latitudes and 190 other *** employ two different supervised machine learning classifiers,combined with the direct observation parameters given by the 4 FGL fits table,to search for sources potentially classified as AGNs and pulsars in the 1336 unassociated *** order to reduce the error caused by the large difference in the sizes of samples,we divide the classification process into two separate steps in order to identify the AGNs and the ***,we select the identified AGNs from all of the samples,and then select the identified pulsars from the remaining *** the 4 FGL sources associated or identified as AGNs,pulsars and other sources with the features selected through the K-S test and the random forest(RF)feature importance measurement,we trained,optimized and tested our classifier ***,the models are applied to classify the 1336 unassociated *** to the calculation results of the two classifiers,we report the sensitivity,specificity,accuracy in each step and the class of unassociated sources given by each *** accuracy obtained in the first step is approximately 9595%;in the second step,the obtained overall accuracy is approximately 80%.Combining the results of the two classifiers,we predict that there are 583 AGN-type candidates,115 pulsar-type candidates,154 other types ofγ-ray candidates and 484 of uncertain types.

关键词： gamma rays:galaxies galaxies:active methods:statistical

Postulation of Seedlings Resistance Genes to Yellow Rust in Commercial Wheat Cultivars from Yunnan Province in China

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Agricultural Sciences in China 2011年第11期10卷 1723-1731页

作者： LI Ming-ju FENG Jing CAo shi-qin LIN Rui-ming CHENG Geng CHEN Wan-quan XU shi-chang State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of AgriculturalSciences Beijing 100193 P.R.China Institute of Environment and Resources Yunnan Academy of Agricultural Sciences Kunming 650205 P.R.China Institute of Plant Protection Gansu Academy of Agricultural Sciences Lanzhou 730070 P.R.China Institute of Food Crops Yunnan Academy of Agricultural Sciences Kunming 650205 P.R.China

The objective of this study was to characterize yellow （stripe） rust resistance gene（s） in 52 commercial wheat cultivars from Yunnan Province in China, and to provide information for their rational deployment in field. Seedlings of wheat cultivars were inoculated with 25 differential isolates ofPuccinia striiformis from foreign and home to postulate resistance genes to yellow rust, and then validated by pedigree. There were 10 probable resistance genes characterized in these cultivars, in which, Yr9 was most commonly postulated to be present in thirteen cultivars. Yr21, the second, was present in four cultivars. Yr8, the third, were present in three cultivars. Yr6, Yrl 7 and Yr26, the fourth, was present in two cultivars respectively. The other gene（s） such as, Yr2＋YrA, Yr7 and Yr27, were only present in single cultivar（s）; unknown gene（s） or gene（s） combination（s） were present in 22 cultivars. One cultivar （Yunmai 42） had no resistance gene tested in this study. Cultivars such as Yunmai 52, Mian 1971-98, Kunmai 4, and Yunmai 56 carried effective genes and can be popularized mainly; Yr9 should be planted with other Yr genes. In the meantime other effective genes should be introduced to realize gene diversity for controlling wheat yellow rust. Yunmai 42 should be reduced to avoid rust breakout. Unknown gene cultivars should be utilized and be researched deeply.

关键词： wheat cultivars yellow (stripe) rust resistance genes gene postulation