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Experimental studies of H_(2)/Ar plasma in a cylindrical inductive discharge with an expansion region

Chinese Physics B 2024年第10期33卷 321-330页

作者： shi-Bo li Si-Yu Xing Fei Gao you-Nian Wang Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China

The electrical parameters of H_(2)/Ar plasma in a cylindrical inductive discharge with an expansion region are investigated by a Langmuir probe,where Ar fractions range from 0%to 100%.The influence of gas composition and pressure on electron density,the effective electron temperature and the electron energy probability functions(EEPFs)at different spatial positions are *** driver region,with the introduction of a small amount of Ar at 0.3 Pa,there is a rapid increase in electron density accompanied by a decrease in the effective electron ***,the shape of the EEPF transitions from a three-temperature distribution to a bi-Maxwellian distribution due to an increase in electron-electron ***,this phenomenon resulting from the changes in gas composition vanishes at 5 Pa due to the prior depletion of energetic electrons caused by the increase in pressure during hydrogen *** EEPFs for the total energy in expansion region is coincident to these in the driver region at 0.3 Pa,as do the patterns of electron density variation between these two regions for differing Ar *** 5 Pa,as the discharge transitions from H_(2)to Ar,the EEPFs evolved from a bi-Maxwellian distribution with pronounced low energy electrons to a Maxwellian distribution in expansion *** evolve may be attributed to a reduction in molecular vibrational excitation reactions of electrons during transport and the transition from localized electron dynamics in hydrogen discharge to non-localized electron dynamics in argon *** order to validate the experimental results,we use the COMSOL simulation software to calculate electrical parameters under the same *** evolution and spatial distribution of the electrical parameters of the simulation results agree well with the trend of the experimental results.

关键词： inductively coupled plasma transmission and distribution energy distribution functions

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缙云山风灾迹地生态重建过程中的竞争研究

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西南师范大学学报（自然科学版） 2000年第5期25卷 601-605页

作者：石胜友李旭光王周平何正明许文蔚西南师范大学生命科学学院重庆400715 缙云山自然保护区重庆400700

采用Hegyi提出的单木竞争指数模型对缙云山风灾迹地生态重建过程中主要优势种四川大头茶、川灰木、小叶栲、马尾松的种内种间竞争强度进行了定量分析 .结果表明 :1)对象木种内竞争较其伴生树种间的竞争剧烈 . 2 )竞争强度与对象木的胸... 详细信息

采用Hegyi提出的单木竞争指数模型对缙云山风灾迹地生态重建过程中主要优势种四川大头茶、川灰木、小叶栲、马尾松的种内种间竞争强度进行了定量分析 .结果表明 :1)对象木种内竞争较其伴生树种间的竞争剧烈 . 2 )竞争强度与对象木的胸径呈幂函数关系 . 3)对象木的生长速度与竞争指数之间有极显著的负相关关系 .

关键词：竞争指数风灾迹地缙云山生态重建

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Expression of neuroglobin in ocular hypertension induced acute hypoxic-ischemic retinal injury in rats

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International Journal of Ophthalmology(English edition) 2011年第4期4卷 393-395页

作者： Shao-Yang shi Xue-Mei Feng you li Xun li and Xiao-Long Chen Department of Ophthalmology Shengjing Hospital of China Medical University Shenyang 11004 Liaoning Province China

AIM: To investigate the Expression of neuroglobin (Ngb) in the retina of rats with ocular hypertension induced acute retinal hypoxic-ischemic injury. METHODS: Seventy Wistar rats were divided into 7 groups randomly. The Experimental model was induced by elevation of intraocular pressure via anterior chamber canula insertion in the left eyes and the fellow eyes were preserved as normal controls. The retinal tissues were taken at 1, 5, 10, 15, 20, 30 and 60 minutes after hypoxic-ischemia injury. Protein was extracted, and then analyzed by Western-blot method. SPSS was used for statistical analysis. RESULTS: The time-depended expressions of Ngb were observed. The level of Ngb increased rapidly at 1 minute after ischemia and reached to the peak at 5 minutes, which had significant difference from that of control group (P 0.05). CONCLUSION: The expression of Ngb in retinal tissue increased rapidly after hypoxic-ischemic injury in rats, suggesting that Ngb may play an important role in the process of acute retinal hypoxic-ischemic injury.

关键词： neuroglobin hypoxia-ischemia retina

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Multi-policy threshold signature with distinguished signing authorities

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The Journal of China Universities of Posts and Telecommunications 2011年第1期18卷 113-120页

作者： WANG Feng ZHOU you-sheng GU li-ze ZHENG shi-hui YANG Yi-xian Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Key Laboratory of Network and Information Attack and Defence Technology Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

Threshold signature plays an important role to distribute the power of a single authority in modem electronic society. In order to add functions and improve efficiency of threshold signatures, a multi-policy threshold signature scheme with distinguished signing authorities is proposed. In the scheme two groups can sign and verify each other, so the scheme is two-way signing and verifying. Moreover, the threshold values of the two groups can change with the security classification of the signing document, every discretionary signatory only signs a small part of the document instead of the whole one, so the bandwidth of data transmission for group signature construction can be reduced and the size of group signature is equivalent to that of any individual signature.

关键词： threshold signature multi-policy group verified distinguished signing authorities

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Divergence, evolution and adaptation in ray-finned fish genomes

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Science China(life Sciences) 2019年第8期62卷 1003-1018页

作者： Chao Bian Yu Huang Jia li Xinxin you Yunhai Yi Wei Ge Qiong shi Center of Reproduction Development and AgingFaculty of Health SciencesUniversity of MacaoMacaoChina Shenzhen Key Lab of Marine Genomics Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic AnimalsBGI Academy of Marine SciencesBGI MarineBGIShenzhen518083China Laboratory of Aquatic Genomics College of Life Sciences and OceanographyShenzhen UniversityShenzhen518060China

With the rapid development of next-generation sequencing technologies and bioinformatics, over 50 ray-finned fish genomes by far have been sequenced with high quality. The genomic work provides abundant genetic resources for deep understanding of divergence, evolution and adaptation in the fish genomes. They are also instructive for identification of candidate genes for functional verification, molecular breeding, and development of novel marine drugs. As an example of other omics data, the Fish-T1 K project generated a big database of fish transcriptomes to integrate with these published fish genomes for potential applications. In this review, we highlight the above-mentioned recent investigations and core topics on the ray-finned fish genome research, with a main goal to obtain a deeper understanding of fish biology for theoretical and practical applications.

关键词： ray-finned fish genome transcriptome application

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Variations of Single Nucleotide Polymorphism (SNP) of Hordoindoline a Gene (hina) and Its Relationships with Kernel Hardness in 92 North American Barley Varieties (Hordeum vulgare L.)

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Agricultural Sciences in China 2009年第12期8卷 1440-1447页

作者： CHEN Guo-yue YANG shi-dong li Wei-tao li Wei WEI Yu-ming ZHENG you-liang Triticeae Research Institute Sichuan Agricultural University Ya'an 625014 P.R.China Key Laboratory of Crop Genetic Resources and Improvement in Southwest China Ministry of Education/Sichuan Agricultural University Ya'an 625014 P.R. China College of Agronomy Sichuan Agricultural University Ya'an 625014 P.R.China

Grain texture in barley （Hordeum vulgare L.） is an important quality character. The single nucleotide polymorphisms （SNPs） in Hordoindoline a （hina） gene and its relationship with hardness index among North American harley cultivars were investigated. The hina genes in 36 cultivars were sequenced for the SNP analyses, and 17 sets of SNP primers were designed to detect the SNP variations of hina locus in 92 North American barley cultivars. SNP detection indicated that there were four haplotypes in the hina genes of 92 barley cultivars, and haplotype 01 and 02 were shared by 68 and 14 cultivars, respectively, suggesting that there was a very limited diversity in hina genes among North American barley cultivars. Despite the wide range in hardness exists in 92 barley cultivars, however, unlike wheat, where a clear relationship has been demonstrated between a number of SNPs in the wheat hardness genes and quality （soft or hard wheat）, there was no such relationship for barley. The genotypes used in this study demonstrated that there was a low level of polymorphism in hina gene in North American barley cultivars and these polymorphisms had no impact on grain hardness.

关键词： barley Hordoindoline a gene hardness SNP haplotype

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Isolation and Characterization of GmSTY1,a Novel Gene Encoding a Dual-Specificity Protein Kinase in Soybean（ Glycme max L.）

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Journal of Integrative Plant Biology 2006年第7期48卷 857-866页

作者： Zhao-shi Xu you-Zhi Ma Xian-Guo Cheng li-Xia Cao lian-Cheng li Ming Chen Key Laboratory of Crop Genetics and Breeding Ministry of Agriculture Institute of Crop Science the Chinese Academy of Agricultural Sciences Beijing 100081 China

Phosphorylation of protein klnases has profound effects on their activity and interaction with other proteins. Tyroslne phosphorylation was reported to be involved in various physiological processes in plants; however, no typical receptor tyrosine kinase has been isolated from plants thus far. Dual-specificity kinases are potentially responsible for the phosphorylation of both tyrosine and serine/threonine of target proteins. A cDNA clone encoding a putative dual-specificity protein kinase was isolated by screening the cDNA GAL4 activation domain （AD） fusion library of soybean （Glycine max L.）, and its entire length was obtained using 5＇-rapid ampUflcatlon of cDNA ends. The predicted polypeptide of 330 amino acid residues, designated as GmSTY1, contains all 11 conserved subdomains, which share common characteristics with both the serine/ threonine and tyroslne protein klnases reported thus far. In addition, three potential N-linked glycosylation sites （NXS/T）, as well as phosphorylation motifs （SXXXS/T）, were observed, suggesting that GmSTY1 may be post-translationally modified. Furthermore, a potential N-myristoylation motif （MGARCSK） was found, suggesting that the GmSTY1 protein could associate with membranes in vivo. Southern blotting analysis revealed a single-copy of GmSTY1 in the genome. Northern blotting analysis showed that this gene was upregulated by drought and salt treatment in a time-dependent manner; however, exogenous abscisic acid （ABA） could not significantly affect the mRNA accumulation of GmSTY1. Interestingly, the transcript of this gene was remarkably downregulated by cold treatment during the early stages of the response, but upregulated later. These results Indicate that the protein kinase was possibly regulated by abiotic stresses in an ABA-independent pathway.

关键词： abiotic stress dual-specificity Glycine max , serine/threonine/tyrosine protein kinase.

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Synthesis and Design of Distillation Columns for Wide-Boiling Binary Mixtures with Vapor Recompression Heat Pumps

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China Petroleum Processing & Petrochemical Technology 2023年第4期25卷 127-138页

作者： shi li SINOPEC Research Institute of Petroleum Processing Co. LtdBeijing 100083China

The vapor recompression heat pump(VRHP) distillation technology offers significant improvements in energy efficiency for distillation systems with small temperature differences between the top and bottom of the column. However, the separation of wide-boiling binary mixtures leads to substantial temperature differences between the top and bottom of the column. This limits the applicability of conventional VRHP due to high capital costs and strict performance requirements of the compressor. To overcome these challenges and to accommodate compressor operating conditions, a novel synthesis and design method is introduced to integrate VRHPs with wide-boiling binary mixture distillation columns(WBMDCs). This method enables quick determination of an initial configuration for the integrated WBMDC-VRHP system and helps identify the optimum configuration with the minimum total annual cost. Two examples, namely the separation of benzene/toluene and isopropanol/chlorobenzene, are employed to derive optimum configurations of the WBMDC-VRHP and compare them with the WBMDC. A systematic comparison between the WBMDC-VRHP and WBMDC demonstrates the superior steady-state performance and economic efficiency of the WBMDC-VRHP.

关键词： vapor recompression heat pump wide-boiling binary mixtures distillation column energy saving synthesis and design

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混凝土中多点聚集爆炸效应起爆参数优化设计

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爆炸与冲击 2025年第1期45卷 151-165页

作者：时本军李杰徐小辉徐天涵郭纬李孝臣李超李干陆军工程大学爆炸冲击防灾减灾全国重点实验室江苏南京210007

混凝土介质中多点同时或彼此微差爆炸可产生复杂的地冲击波叠加聚集效应,从而使特定作用区域内的地冲击波压力显著增强,大大提升爆炸的毁伤威力。为获取多点爆源不同排布方式下爆炸聚集效应及地冲击传播衰减规律,进行了混凝土中单点和... 详细信息

混凝土介质中多点同时或彼此微差爆炸可产生复杂的地冲击波叠加聚集效应,从而使特定作用区域内的地冲击波压力显著增强,大大提升爆炸的毁伤威力。为获取多点爆源不同排布方式下爆炸聚集效应及地冲击传播衰减规律,进行了混凝土中单点和七点聚集爆炸的现场和数值模拟试验,基于正交设计方法和灰色系统理论对多点起爆参数进行了优化设计,建立了比例装药间距、比例有源装药高度和比例起爆微差等因素与不同爆心距下峰值压力间的灰色关联度系数及灰色关联度,确定了起爆参数的优选组合,并开展了数值模拟试验检验。分析结果表明:影响地冲击聚集效应的主要因素为比例装药间距,其次为比例起爆微差,最次为比例有源装药高度。在本模拟试验情况下,采用优化的起爆参数时,即在比例装药间距为0.549 m/kg^(1/3)、比例起爆微差为0.239 m/kg^(1/3)和比例有源装药高度为0 m/kg^(1/3)时,地冲击波聚集效应达到最佳,最大可达单点同等装药量产生的地冲击压力的4.7倍。

关键词：灰色理论聚集爆炸混凝土关联度优化设计

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Efficient circularly polarized photoluminescence and electroluminescence of chiral spiro-skeleton-based thermally activated delayed fluorescence molecules

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Science China Chemistry 2022年第7期65卷 1347-1355页

作者： Yi-Pin Zhang shi-Quan Song Meng-Xi Mao Cheng-Hui li you-Xuan Zheng Jing-lin Zuo State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China MaAnShan High-Tech Research Institute of Nanjing University Maanshan 238200China

Chiral thermally activated delayed fluorescence(TADF) molecules showing circularly polarized luminescence(CPL) have great potential in 3D displays. However, the relationships among CPL property, device performance and molecule structure are still not clear. In this article, we develop a strategy to promote dissymmetry factors without sacrifice in device performance and study the impact of molecule structures towards CPL property. Three novel TADF enantiomers are synthesized and studied.(R/S)-SCN with diminutive cyano group as an acceptor shows dissymmetry factor |gPL| ≈ 1.4×10^(-3) and noticeable organic light-emitting diode(OLED) performances with a maximum external quantum efficiency(EQEmax) of 23.0%. For(R/S)-SPHCN, the prolonged electron withdrawing group benzonitrile enhances |gPL| up to 3.6×10^(-3) with decreased device EQEmaxof 15.4%. By further replacing benzonitrile with(trifluoromethyl)pyridine, the enantiomers of(R/S)-SCFPY show similar |gPL| factors of 3.5×10^(-3) and device EQE_(max)up to 23.3%, which represents the highest efficiency among sprio-type TADF materials based OLEDs. Furthermore, the OLEDs also show obvious circularly polarized electroluminescence with gELfactors of-1.4/1.8×10^(-3),-3.6/3.6×10^(-3) and-3.7/3.6×10^(-3), respectively. These results indecate by delicate functional group engineering, high g factor can be achieved while maintaining decent device performances. Besides,(R/S)-SCFPY represents an impressive TADF emitter, which shows promoted g factor and recorded high device EQE_(max)among similar molecules.

关键词： chiral spiro-skeleton thermally activated delayed fluorescence circularly polarized photoluminescence circularly polarized electroluminescence dissymmetry factor

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