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Synthesis and Characterization of a Novel Copoly(aryl ether ketone) Containing 4, 4'-Biphenyl-bis[4-phthalazin-1(2H)-one] Moiety

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Chinese Chemical Letters 2003年第2期14卷 145-146页

作者： Shao Yin zhang Xi Gao JIAN Shu De xiao Jin Yan WANG Jie zhang Department of Polymer Science and Materials Dalian University of TechnologyDalian 116012

A new monomer of 4, 4-biphenyl-bis[4-phthalazin-1(2H)-one] was synthesized from biphenyl and phthalic anhydride, and a novel copoly(aryl ether ketone) (PPEK) was synthesized from 2, 2-bis(4-hydroxyphenyl)-propane (BPA), 4, 4'-biphenyl-bis-[4-phthalazin-1(2H)-one], 4, 4- difluorodiphenylketone (DFK). The monomer and copolymer were characterized by FT-IR and 1H-NMR. DSC and TGA were used to the novel polymer.

关键词： Poly(aryl ether ketone) 4,4'-biphenyl-bis[4-phthalazin-1(2H)-one] 2,2-bis(4-hydroxy- phenyl)-propane(BPA).

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风电机组雷电过电压的仿真分析

电工技术学报 2015年第24期30卷 237-244页

作者：肖翔张小青李聪北京交通大学电气工程学院北京100044

雷击会对风电机组造成严重损坏,是影响风场安全运行的主要因素。在雷击过程中,雷电流流经塔体,并通过电磁场的耦合作用,在塔体内部三相电缆和机组变压器上产生雷电过电压,影响内部设备的正常运行。通过电磁暂态软件PSCAD搭建了比较全面... 详细信息

雷击会对风电机组造成严重损坏,是影响风场安全运行的主要因素。在雷击过程中,雷电流流经塔体,并通过电磁场的耦合作用,在塔体内部三相电缆和机组变压器上产生雷电过电压,影响内部设备的正常运行。通过电磁暂态软件PSCAD搭建了比较全面的风电机组模型,对风电机组的暂态过电压进行计算分析,并研究了不同大小的接地电阻以及不同接地方式对风电机组过电压分布的影响。计算结果表明良好的接地系统有利于降低电缆上的过电压,但不能改变塔体上过电压的最大值,而接地方式的不同对过电压影响巨大,两种接地方式各有优劣。最后为风电机组加入避雷器,验证了防雷设计的有效性,仿真结果为风电机组的安全、经济的防雷设计提供了参考依据。

关键词：雷击风机模型过电压接地方式避雷器保护

Comprehensive genome sequencing analyses identify novel gene mutations and copy number variations associated with infant developmental delay or intellectual disability(DD/ID)

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Genes & Diseases 2022年第5期9卷 1166-1169页

作者： Yuxia Chen xiang Tang Ling Liu Qinrong Huang Li Lin Guoing Liu Nong xiao Department of Children Rehabilitation Children's Hospital of Chongqing Medical UniversityMinistry of Education Key Laboratory of Child Development and DisordersNational Clinical Research Center for Child Health and DisordersChina International Science and Technology Cooperation Base of Child Development and Critical DisordersChildren's Hospital of Chongqing Medical UniversityChongqing Key Laboratory of Translational Medical Research in Cognitive Development and Learning and Memory DisordersChongqing 400014PR China

To the Editor,Developmental delay or intellectual disability(DD/ID)is one of the most common neurodevelopmental disabilities worldwide with high clinical and genetic *** etiology remains unexplained in nearly 70%of these patients,and an accurate diagnosis still poses a challenge in clinical *** DD/ID cohort studies mostly used panel sequencing or chromosome microarray analysis(CMA),but targeted capture probes could not be updated in time,resulting in an increased risk of missed detection of genetic abnormalities.

关键词： diagnosis clinical infant

Association Between Dentin Matrix Protein 1 （rs10019009） Polymorphism and Ankylosing Spondylitis in a Chinese Han Population from Shandong Province

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Chinese Medical Journal 2016年第6期129卷 657-664页

作者： Jian-Min Liu Ya-Zhou Cui Geng-Lin zhang xiao-Yan Zhou Jing-xiang Pang Xue-Zheng Wang Jin-xiang Han Allergy and Clinical Immunology Research Centre First Affiliated Hospital of Liaoning Medical University Jinzhou Liaoning 121001 China National Laborat'ory for Bio-Drugs of Mini'stry of Health Provincial Laboratory fo'r Modern Medicine and Technology of Shanclong Research Center for Medicinal Biotechnology Shandong Academy of Medical Sciences Jinan Shandong 250062 China

Background： Ankylosing spondylitis （AS） is the most common rheumatic condition that is slowly progressive and predominantly affects adolescents. Pathological bone formation associated with AS is an important cause of disability. The aim of the study was to investigate the possible involvement of the genes related to endochondral ossification and ectopia ossification in genetic susceptibility to AS in a Chinese Han population. Methods： Sixty-eight single nucleotide polymorphisms （SNPs） from 13 genes were genotyped in discovery cohorts including 300 AS patients and 180 healthy controls. The rs10019009 in dentin matrix protein 1 （DMP1） gene shown as association with AS after multiple testing corrections in discovery cohorts was replicated in a validation independent cohort of 620 AS patients and 683 healthy controls. The rs 10019009 was assessed with bioin fomlatics including phylogenetic context, F-SNP and FastSNP functional predictions, secondary structure prediction, and molecular modeling. We performed a functional analysis of rs10019009 via reverse transcription-polymerase chain reaction, alkaline phosphatase （ALP） activity in human osteosarcoma U2OS cells. Results： Interestingly, the SNP rs10019009 was associated with AS in both the discovery cohort （P = 0.0012） and validation cohort （P - 0.0349）, as well as overall （P = 0.0004） in genetic case-control association analysis. After a multivariate logistic regression analysis, the effect of this genetic variant was observed to be independent of linkage disequilibrium. Via bioinformatics analysis, it was found that the amino acid change of the rs 10019009 led to changes of SNP function, secondary structure, tertiary confomlation, and splice mode. Finally, functional analysis ofrsl0019009 in U2OS cells demonstrated that the risk T allele of the rsl0019009 increased enzymatic activity of ALP, compared to that of the nonrisk allele （P = 0.0080）. Conclusions： These results suggested that the DMP1 gene seems to be involve

关键词： Alkaline Phosphatase Ankylosing Spondylitis Dentin Matrix Protein I Ectopic Mineralization Polymorphisms

Oligo-lysine Induced Formation of Silica Particles in Neutral Silicate Solution

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Chemical Research in Chinese Universities 2006年第3期22卷 368-370页

作者： zhang xiao-dong SUN Ying-ying ZHUANG Jia-qi YANG Wen-sheng College of Chemistry Jilin University Changchun 130023 P.R. China

Oligo-（lysine） n （n = 1-4） containing different numbers of lysine residues was used to induce the condensation of silicic acid to form silica particles in neutral silicate solution. It was found that the condensation rate and the formation of silica particles are dependent on the number of lysine residues in an oligo-lysine. Oligo-lysine with more lysine residues can link more silicic acid together to form a matrix that promotes the effective aggregation of the condensed silica pieces to form large silica particles.

关键词： Biosilification Polylysine Silica

Habitat heterogeneity and biotic interactions mediate climate influences on seedling survival in a temperate forest

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Forest Ecosystems 2023年第5期10卷 579-588页

作者： Haikun Liu Hang Shi Quan Zhou Man Hu xiao Shu Kerong zhang Quanfa zhang Haishan Dang Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan430074China University of Chinese Academy of Sciences Beijing100049China

Seedling stage has long been recognized as the bottleneck of forest regeneration,and the biotic and abiotic processes that dominate at seedling stage largely affect the dynamics of *** might be particularly vulnerable to climate stress,so elucidating the role of interannual climate variation in fostering community dynamics is crucial to understanding the response of forest to climate *** seedling survival data of 69 woody species collected for five consecutive years from a 25-ha permanent plot in a temperate deciduous forest,we identified the effects of biotic interactions and habitat factors on seedling survival,and examined how those effects changed over *** found that interannual climate variations,followed by biotic interactions and habitat conditions,were the most significant predictors of seedling *** light showed a positive impact on seedling mortality,and seedling survival responded differently to soil and air *** of conspecific neighbor density were significantly strengthened with the increase of maximum air temperature and vapor pressure deficits in the growing season,but were weakened by increased maximum soil temperature and precipitation in the non-growing ***,seedling survival was strongly correlated with interannual climate variability at all life stages,and the strength of the correlation increased with seedling *** addition,the importance of biotic and abiotic factors on seedling survival differed significantly among species-trait ***,the neighborhood-mediated effects on mortality might be significantly contributing or even inverting the direct effects of varying abiotic conditions on seedling survival,and density-dependent effects could not be the only important factor influencing seedling survival at an early stage.

关键词： Seedling survival Extreme interannual climate Negative density-dependence Species coexistence

Towards adaptable synchrotron image restoration pipeline

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Nuclear Science and Techniques 2024年第10期35卷 4-16页

作者： Chun Li xiao-Xue Bi Yu-Jun zhang Zhen zhang Li-Wen Wang Jian Zhuang Dong-Liang Chen Yu-Hui Dong Yi zhang Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China

Synchrotron microscopic data commonly suffer from poor image quality with degraded resolution incurred by instrumentation defects or experimental *** restoration methods are often applied to recover the reduced resolution,providing improved image details that can greatly facilitate scientific *** these methods,deconvolution techniques are straightforward,yet either require known prior information or struggle to tackle large experimental *** learning(DL)-based super-resolution(SR)methods handle large data well,however data scarcity and model generalizability are *** addition,current image restoration methods are mostly offline and inefficient for many beamlines where high data volumes and data complexity issues are *** overcome these limitations,an online image-restoration pipeline that adaptably selects suitable algorithms and models from a method repertoire is *** this study,using both deconvolution and pretrained DL-based SR models,we show that different restoration efficacies can be achieved on different types of synchrotron experimental *** describe the necessity,feasibility,and significance of constructing such an image-restoration pipeline for future synchrotron experiments.

关键词： Synchrotron Deconvolution Deep learning Super-resolution Pipeline

Two New Types of Conserved Quantities Deduced from Noether Symmetry for Nonholonomic Mechanical System

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Communications in Theoretical Physics 2009年第2期51卷 205-208页

作者： zhang xiao-Ni FANG Jian-Hui PANG Ting LIN Peng College of Physics Science and Technology China University of Petroleum Dongying 257061 China

For a nonholonomic mechanical system, the generalized Mei conserved quantity and the new generalized Hojman conserved quantity deduced from Noether symmetry of the system are studied. The criterion equation of the Noether symmetry for the system is got. The conditions under which the Noether symmetry can lead to the two new conserved quantities are presented and the forms of the conserved quantities are obtained. Finally, an example is given to illustrate the application of the results.

关键词： Noether symmetry conserved quantity nonholonomic mechanical system

Synthesis, Structure and Properties of Two New Coordination Polymers Based on 4-[（8-Hydroxy-5-quinolinyl）azo]-benzenesulfonic Acid

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Chemical Research in Chinese Universities 2014年第1期30卷 27-31页

作者： LUO Yanan XU Xianzhu SUN Fuxing YU xiaoyang zhang xiao zhang Ting YU Liying State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150080 P. R. China State Key Laboratory of Inorganic Synthesis & Preparative Chemistry Jilin University Changchun 130012 P. R. China College of Chemical and Pharmaceutical Engineering Jilin Institute of Chemical Technology Jilin 132022 P. R. China

Two new coordination polymers based on 4-[（8-hydroxy-5-quinolinyl）azo]-benzenesulfonic acid（H2L）,{[CdL（H2O）2]·H2O}n（1） and {[CdL（en）]·EtOH}n（2）（en=ethylenediamine）,were solvothermally synthesized and structurally characterized by single-crystal X-ray *** 1 and 2 exhibit infinite 1D ladder-shaped chain structures,which are isostructural except that the two coordinating water molecules in compound 1 were replaced by one en molecule in compound 2 due to the use of different organic *** 1 and 2 were constructed into different supramolecular frameworks by hydrogen bonding and π…π stacking *** addition,the fluorescent properties of compounds 1 and 2 were ***,they were also investigated via IR spectral analysis,elemental analysis,powder X-ray diffraction（PXRD） and thermogravimetric analysis（TGA）.

关键词： 4-[(8-Hydroxy-5-quinolinyl)azo]-benzenesulfonic acid Solvothermal synthesis Coordination polymer Fluorescent property