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An Improved Mumford-Shah Model and Its Applications to Image Processing with the Piecewise Constant Level Set Method

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自动化学报 2007年第12期33卷 1259-1262页

作者： SONG jin-Ping li Shuai-jie Institute of Applied Mathematics College of Mathematics and Information ScienceHenan UniversityKaifeng 475004P.R.China

为快分割并且降噪，提高 penalization 学期的古典 Mumford-Shah (MS ) 模型需要，即增加 penalization 参数，它导致目标的渐渐的消失。在这份报纸，我们建议一个改进 Mumford-Shah (IMS ) 模型避免现象，并且采用 piecewise 常数水平... 详细信息

为快分割并且降噪，提高 penalization 学期的古典 Mumford-Shah (MS ) 模型需要，即增加 penalization 参数，它导致目标的渐渐的消失。在这份报纸，我们建议一个改进 Mumford-Shah (IMS ) 模型避免现象，并且采用 piecewise 常数水平集合方法(PCLSM ) 和坡度降下方法解决最小化问题。数字实验被给显示出新模型和算法的效率和优点。

关键词：分段持续水平集方法分割降噪经典MS模型最小化算法

Genetic Structure and Eco-Geographical Differentiation of Cultivated Keng Rice(Oryza sativa ***) in China Revealed by Microsatellites

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Journal of Integrative Agriculture 2012年第11期11卷 1755-1766页

作者： ZHANG Dong-ling WANG Mei-xing QIYong-wen SUN Jun-li WANG Feng-mei li jin-jie ZHANG Hong-liang Eli Zi-chao Key Laboratory of Crop Heterosis and Utilization Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing 100193 P.R. China Zhejiang Academy of Agricultural Sciences Hangzhou 310021 P.R.China Guangzhou Sugarcane Industry Research Institute Guangzhou 510316 P.R. China Ministry of Agriculture Beijing 100026 P.R. China

China is one of the largest centers of genetic diversity of Oryza sativa L. and is the original centers of Oryza sativa L. subspecies japonica. Using a genetically representative core collection of 1 442 rice landraces of japonica in China, the genetic structure, differentiation, and geographic diversity were analyzed. The model-based structure analysis on varieties within three ecotypes revealed 16 eco-geographical types, which are partially accorded with some of the ecological zones in China. The differentiation of eco-geographical types contributed to the local ecological adaption and physical isolation, and maybe could be used to develop the heterotic groups of japonica. To facilitate the identification of different ecotypes and eco-geographical types, we provided the SSR character alleles of each ecotype or geographical eco-group and a rapid discriminated method based on these character alleles. Lastly, investigation on genetic diversity, genetic differentiation indicated that southwest region of China, including south of Yunnan Province, northwest of Guangxi Zhuang Autonomous Region, and southwest of Guizhou Province, possessed the highest genetic diversity and all the necessary conditions as a center of genetic diversity and should be the center of genetic diversity of rice landraces of japonica in China.

关键词： japonica rice population structure eco-geographical differentiation China microsateltites

Fine Mapping and Cloning of the Grain Number Per-Panicle Gene (Gnp4) on Chromosome 4 in Rice (Oryza sativa L.)

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Agricultural Sciences in China 2011年第12期10卷 1825-1833页

作者： ZHANG Zhan-ying li jin-jie YAO Guo-xin ZHANG Hong-liang DOU Hui-jing SHI Hong-li SUN Xing-ming li Zi-chao Key Laboratory of Crop Heterosis and Utilization Ministry of Agriculture/Beijing Key Laboratory of Crop Genetic Improvement ChinaAgricultural University Beijing 100193 P.R.China

Grain number per-panicle is one of the most important components for rice yield. Spikelets on the primary and secondary branches determine the grain number per-panicle in rice. In this study, we identified a natural mutant, gnp4, lack of lateral spikelet on the secondary branches in the field condition. In addition, the Gnp4 and Lax1-1 double mutant showed dramatically reduced secondary branches and spikelets in panicle at reproductive stage, and tillers at vegetative stage. By map-based cloning approach, and using four F2 segregating populations, the Gnp4 gene was finally mapped to a 10.7-kb region on the long arm of chromosome 4 in rice. In this region, only one gene was predicted, and genomic DNA sequencing of the 10.7-kb region showed no nucleotide differences between the mutant and wild type. Interestingly, we found that the methylation level of several cytosines in the promoter CpG islands region of the predicted gene in gnp4 were different from the wild type. Thus, we propose that the DNA methylation changes at these sites may induce to decrease expression level of Gnp4, consequently, resulting in phenotypic variation.

关键词： rice gnp4 laxl-1 grain number per-panicle methylation

Laboratory study of property-modified prebaked carbon anode and application in large aluminum electrolysis cells

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Journal of Central South University of Technology 2005年第z1期12卷 68-71页

作者： XIAO jin li jie YE Shao-long LAI Yan-qing liU Ye-xiang School of Metallurgical Science and Engineering Central South University Changsha 410083 China School of Metallurgical Science and Engineering Central South University Changsha 410083 China School of Metallurgical Science and Engineering Central South University Changsha 410083 China School of Metallurgical Science and Engineering Central South University Changsha 410083 China School of Metallurgical Science and Engineering Central South University Changsha 410083 China

A kind of complex additive mainly containing Al, Mg, F, and O was prepared. The synthetical performances of the property-modified prebaked anodes containing additives were tested in laboratory. On the basis of ideal testing results obtained, a large number of industrial prebaked property-modified anodes are prepared in a large-scale aluminum company. Further more, they are all used in 160 kA prebaked anode aluminum electrolysis cells. The statistic result show that, compared with common anodes, the property-modified ones enhance current by 11.6 kg per ton aluminum averagely.

关键词： aluminum electrolysis property-modified anodes laboratory study industrial application

Taraxastane-type triterpenoids from the medicinal and edible plant Cirsium setosum

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Chinese Journal of Natural Medicines 2019年第1期17卷 22-26页

作者： liN Peng-Cheng JI lin-lin ZHONG Xiang-Jian li jin-jie WANG Xin SHANG Xiao-Ya liN Sheng College of Pharmaceutical Sciences Qinghai University for Nationalities Beiijing Key Laboratory of Bioactive Substances and Functional Foods Beijing Union University State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical College

Guided by TNF-α secretion inhibitory activity assay, four taraxastane-type triterpenoids, including two new ones, 22-oxo-20-taraxasten-3β, 30-diol(1) and 22α-hydroxy-20-taraxasten-30β, 30-triol(2), have been obtained from an active fraction of the petroleum ether-soluble extract of the the medicinal and edible plant Cirsium setosum. Their structures were elucidated by spectroscopic data and CD data analysis. In the TNF-α secretion inhibitory activity assay, compounds 1 and 2 were active with the IC50 of 2.6 and 3.8 μmol·L-1, respectively. In addition, compounds 1 and 2 showed moderately selective cytotoxicity against the human ovarian cancer(A2780) and colon cancer(HCT-8) cell lines.

关键词： Cirsium setosum Taraxastane-type triterpenoid TNF-α secretion inhibitory activity Cytotoxicity

Synthesis, Characterization and Properties of Bipolar Triphenylamine Charge Transport Materials

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Chinese Journal of Structural Chemistry 2019年第4期38卷 533-540页

作者： liU Xi-Cheng liU Xin-Yu ZHOU Ping li jin-jie TIAN Hao-Ze li Xiang-Gao School of Chemistry and Chemical Engineering Qufu Normal University School of Chemical Engineering and Technology Tianjin University

Four bipolar triphenylamine(TPA) charge transport materials were constructed by introducing imidazole and trifluoroacetyl groups into the TPA units, and characterized by the nuclear magnetic resonance spectrum(NMR) and mass spectrometry(MS). Among them, 4-(2-(1,3-trifluoroacetyl)imidazole)-phenyl-4,4?-di(4-methoxyphenyl)amine(2 Me OTPA-IOS, 1) was determined by X-ray single-crystal diffraction. The compound crystallizes in monoclinic system, space group P21/c with a = 24.338(5), b = 9.565(2), c = 11.456(2) ?, β = 99.427(3)°, Mr = 565.47, V = 2631.0(8) ?3,Z = 4,Dc = 1.428 g/cm3, μ = 0.125 mm–1, F(000) = 1160, the final R = 0.0559 and wR = 0.1265 for 5150 observed reflections with I > 2σ(I). The optimized configurations of the target compounds were obtained by quantum chemical calculation, and the bipolarity of transportable holes and electrons was predicted by the frontier molecular orbital(HOMO and LUMO), which was further confirmed by the time of flight(TOF) method. In addition, the introduction of the terminal flexible chain enhances the solubility, thermal stability(DSC and TGA) and film-forming property of all compounds, and the frontier orbital energy of the solid film of the compounds was also tested(UV-vis and PYS). Thus, these compounds have the bipolarity of transportable holes and electrons and show good solubility and thermal stability.

关键词： triphenylamine(TPA) bipolarity material hole-transport electron-transport

Mapping of three QTLs for seed setting and analysis on the candidate gene for qSS-1 in rice(Oryza sativa L.)

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Journal of Integrative Agriculture 2016年第4期15卷 735-743页

作者： Elsheikh Y M Ahmed ZHANG Yan-pei YU Jian-ping Rashid M A Rehman ZHANG Zhan-ying ZHANG Hong-liang li jin-jie li Zi-chao Key Laboratory of Crop Heterosis and Utilization Ministry of Education Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University

The lower seed setting is one of the major hindrances which face grain yield in rice. One of the main reasons to cause low spikelet fertility （seed setting） is male sterility or pollen abortion. Notably, pollen abortion has been frequently observed in advanced progenies of rice. In the present study, 149 BC2F6 individuals with significant segregation in spikelet fertility were generated from the cross between N040212 （indica） and Nipponbare （japonica） and used for primary gene mapping. Three QTLs, qSS-1, qSS-7 and qSS-9 at chromosomes 1, 7 and 9, respectively, were found to be associated with seed setting. The recombinant analysis and the physical mapping information from publicly available resources exhibited that the qSS-1, qSS-7 and qSS-9 loci were mapped to an interval of 188, 701 and 3741 kb, respectively. The seed setting responsible for QTL qSS-1 was further fine mapped to 93.5 kb by using BC2F7 population of 1 849 individuals. There are 16 possible putative genes in this 93.5 kb region. Pollen vitality tests and artificial pollination indicated that the male gamete has abnormal pollen while the female gamete was normal. These data showed that low seed setting rate relative to qSS-1 may be caused by abnormal pollen grains. These results will be useful for cloning, functional analysis of the target gene governing spikelet fertility （seed setting） and understanding the genetic bases of pollen sterility.

关键词： rice (Oryza sativa L.) QTL mapping seed setting pollen sterility

Hyperbranched Azopolymer with Quadruple Responsibility

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Chinese Journal of Polymer Science 2021年第9期39卷 1169-1176页

作者： Chen Tian Ke-Cong Zhou Yu-Fei Lua jin-jie li Yuan Yao Xin-Feng Tao Qi-Xin Zhuang Yu-Feng Xie Shao-liang ling Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Department of Periodontology Shanghai Ninth People's HospitalCollege of StomatologyShanghai Key Laboratory of Stomatology&Shanghai Research Institute of StomatologyShanghai Jiao Tong UniversityShanghai 200011China

Simply constructing multiple responsive polymers with obvious shape and dimension variations on their assemblies upon different stimuli is still rarely *** this study,we report a hyperbranched polymer named HPAzoBAHB-star-PEG_(9) with quadruple-response to light,temperature,pH and oxidation *** polymer contains azobenzene chromophore,sulfide,amide and amine groups in its hydrophobic hyperbranched core,and the core is capped with hydrophilic polyethylene glycol(PEG_(9))***-5tar-PEG_(9) could assemble into unusual leaf-like lamellar micelles at 25℃ under the guidance of orderly arranged H-aggregate of azobenzene *** leaf-like lamellar micelles can transform into vesicles upon UV irradiation and lower temperature,or convert to smaller spherical micelles in acidic or oxidative environments,respectively,with the destroy of ordered azobenzene *** quadruple-responsive hyperbranched polymer is suitable to con struct multiple stimuli-resp on sive micro/nanostructures,or accurate delivery and release following subtle stimuli seque nces.

关键词： Hyperbranched Azopolymer Multiple responsibility Self-assembly

Identification of summer nectar plants contributing to outbreaks of Mythimna separata(Walker)(Lepidoptera: Noctuidae) in North China

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Journal of Integrative Agriculture 2018年第7期17卷 1516-1526页

作者： GUO Pei WANG Gao-ping jin li-jie FAN Xing-qi HE Han-lin ZHOU Pei-wen GUO Xian-ru li Wei-zheng YUAN Guo-hui College of Plant Protection Henan Agricultural University

The presence of adequate nectar sources along the migratory pathway is a prerequisite for moths of oriental armyworm, Mythimna separata, to reach target habitats and lay eggs. Identification of plant species and assessment of their suitability as wild nectar sources along the summer migration pathway of adult M. separata are critical steps in making effective forecasts of second-and third-generation armyworm outbreaks in North China. We explored five aspects of moth-nectar source relationships：（1） Field investigations in 2014 and 2015 showed that the florescence of chaste tree, Vitex negundo var. heterophylla, a primary nectar plant in apiculture, coincided with the summer migration of oriental armyworm moths. The flowers of chaste tree opened day and night and M. separata moths were found actively flying around and resting on tree.（2） Identification of moth-borne pollen by scanning electronic microscopy（SEM） micrographs in 2015 and 2016 revealed that 15.4% of 369 moths trapped by blacklight traps, 17.1% of 557 moths captured by vertical-pointing searchlight traps and 24.4% of 311 moths caught by pheromone traps were found with pollen attached to their proboscis. A total of 228 pollen-carrying individuals out of 1237 armyworm moths were captured by the three types of traps. The three highest percentages of pollen-bearing armyworm moths were carrying pollen of Toona sp.（59.65%）, ligustrum sp.（27.19%） and Syringa sp.（4.39%）. In total, 14 types of pollen were detected where three were identified to species, 10 to genus and one as an unknown species.（3） Analysis of geographical distribution, flowering periods and relative abundances of candidate nectar plants suggested that Chinese toon, Toona sinensis, and privet, ligustrum lucidum, were two important nectar plant species.（4） Analysis on relationship between pollen and ovarian development showed that 14, 15 and 10 females carrying pollen of T. sinensis had ovaries at developmental stages Ⅰ, Ⅱ and Ⅲ, respectively. Many

关键词： Mythimna separata pollen ovarian development nectar plant