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Numerical simulation of the preparation of semi-solid metal slurry with damper cooling tube method

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Journal of University of Science and Technology Beijing 2007年第5期14卷 443-448页

作者： Haoqiang Yang shuisheng Xie Lei li State Key Laboratory for Fabrication and Processing of Nonferrous Metals Beijing General Research Institute for Nonferrous Metals Beijing 100088 China

In semi-solid forming process, preparing the slurry with rosette or globular microstructure is very important. A new approach named the damper cooling tube method （DCT）, to produce the semi-solid metal slurry, has been introduced. To optimize the technical parameters in designing the apparatus, the finite volume method was adopted to simulate the flow process. The temperature effects on the rheological properties of the slurries were also considered. The effects of the technical parameters on the slurry properties were studied in detail.

关键词： semi-solid forming rheology damper cooling tube method finite volume method

A Feasible and Novel Multi-Generation System Taking Advantage of Two-Stage Compressor for Luxury Hotels

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Journal of Thermal Science 2021年第3期30卷 817-827页

作者： li Hongqiang ZHOU Saiqun HE Changjie DENG Lu li Lu li shuisheng ZHANG Guoqiang College of Civil Engineering Hunan UniversityChangsha 410082China National Center for International Research Collaboration in Building Safety and Environment(NCIRCBSE) Hunan UniversityChangsha 410082China Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education Hunan UniversityChangsha 410082China 3rd Construction Co. Ltd of China Construction Fifth EngineeringChangsha 410004China Key Laboratory for Damage Diagnosis of Engineering Structures of Hunan Province Hunan UniversityChangsha 410082China Ltd of China Construction Fifth Engineering Changsha 410004China

In order to satisfy heating,cooling and domestic hot water demand and energy conversion in luxury hotels,a feasible and novel multi-generation system taking advantage of the two-stage compressor was proposed and *** feature of this novel system is that the compressing power can be reduced and domestic water can be generated at the same time by adopting two-stage compressors instead of conventional one-stage compressor with a high compressing *** energy-saving mechanism and two operating modes were introduced in *** a further way,the thermodynamic performance was calculated by Aspen Plus so as to make a better understanding of this novel *** the calculation results showed that,in summer and transition seasons operating mode,the system can obtain COP(Coefficient of Performance)7.3,and 60℃ domestic hot water,when evaporating temperature is 4℃;while,in winter season operating mode,the system can obtain COP 3.1,and 58℃ domestic hot water,when evaporating temperature is-24℃.Compared with the conventional independent systems,this system can achieve higher energy-efficient,higher waste heat recovery,reduce energy consumption,and meet multiple energy demands simultaneously.

关键词： two-stage compression building energy conversion heat recovery district energy systems energy saving multi-energy output

Research on Landscape Energy-Saving Integrated Water Curtain System

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Journal of Thermal Science 2019年第6期28卷 1150-1163页

作者： GUO Pengxin li Hongqiang HE Changjie ZHENG Yingfa li shuisheng ZHANG Guoqiang 3rd Construction Co. Ltd of China Construction Fifth EngineeringChangsha 410004China College of Civil Engineering Hunan UniversityChangsha 410082China Ltd of China Construction Fifth Engineering Changsha 410004China National Center for International Research Collaboration in Building Safety and Environment(NCIRCBSE) Hunan UniversityChangsha 410082China Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education Hunan UniversityChangsha 410082China

Aiming at the serious heat and cold loss of the building glass curtain wall in the field of amusement and tourism,and the need to meet the landscape requirements of the building facade,this paper put forward the idea of integrating the shading and consumption reduction of glass curtain wall with the landscape requirements,that is,the water curtain was set outside the glass curtain wall to form a landscape energy-saving integrated water curtain wall system,while meeting the needs of landscape and *** establishing the numerical calculation model of the system,the corresponding relationship between the thickness of water film and the weakening of solar radiation intensity was revealed,as well as the influence of wind speed and wind direction on the nozzle exit angle and velocity selection;and the synergistic law of air flow rate and air temperature drop *** results showed that the water film thickness at 3-4 cm can reduce the solar radiation by 65%-80%.The temperature of the air layer between the water film and the curtain wall decreased as the air flow rate decreased,when the thickness of water film was 2 cm and the air velocity was 0.5-1.5 m/s,the air temperature dropped to 2.47-3.6°***,through the analysis of the actual project-ICE World&WATER Park,the system can reduce 66.8%of solar radiation,and reduce the air layer temperature by 3.9°C.

关键词： glass curtain wall integration of landscape and energy-saving water curtain sunshade evaporative cooling natural resources

肺炎支原体肺炎患儿血清D-二聚体和C反应蛋白及降钙素原水平变化的临床意义

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当代医学 2024年第1期30卷 86-89页

作者：李俊雄李水生廖燕金清流县总医院检验科福建三明365300

目的探讨肺炎支原体肺炎(MPP)患儿血清D-二聚体(D-D)、C反应蛋白(CRP)和降钙素原(PCT)水平变化的临床意义。方法选取2020年1月至2022年1月于清流县总医院就诊的120例MPP患儿作为MPP组,根据疾病严重程度分为轻症组(n=76)与重症组(n=44),... 详细信息

目的探讨肺炎支原体肺炎(MPP)患儿血清D-二聚体(D-D)、C反应蛋白(CRP)和降钙素原(PCT)水平变化的临床意义。方法选取2020年1月至2022年1月于清流县总医院就诊的120例MPP患儿作为MPP组,根据疾病严重程度分为轻症组(n=76)与重症组(n=44),并以同期50名门诊体检正常儿童作为对照组,比较各组及MPP组不同病程分期患儿血清D-D、CRP和PCT水平。分析D-D、CRP、PCT与MPP病情严重程度相关性,绘制ROC曲线分析D-D、CRP、PCT单一检测与联合检测对MPP的诊断价值。结果重症组和轻症组血清D-D、CRP和PCT水平均高于对照组,且重症组高于轻症组(P0,P<0.05)。ROC曲线分析结果显示,血清D-D、CRP、PCT三者联合检测的AUC、灵敏度和特异度均明显高于D-D、CRP、PCT单一检测(P<0.05)。结论血清D-D、CRP和PCT水平与MPP病情严重程度呈正相关,其水平能反映MPP患儿病情变化,可作为MPP患儿疗效评估的重要指标,三种指标联合检测的诊断价值更高。

关键词：肺炎支原体肺炎 D-二聚体 C反应蛋白降钙素原

基于纤维-骨料细观分布的自密实钢纤维混凝土单调和循环压缩性能研究

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中南大学学报（自然科学版） 2024年第9期55卷 3384-3399页

作者：雷明锋胡子威刘凌晖扎西草李水生杨子汉中南大学土木工程学院湖南长沙410075 中国建筑第五工程局有限公司湖南长沙410004

自密实钢纤维混凝土(SFRSCC)压缩性能表现和内部组分含量及分散状态均具有显著关联。为探究这种关联特性,定制不同组分配比的SFRSCC拌合物来浇筑制备棱柱体试块,并分别开展单调及循环压缩实验探索其压缩性能特性研究;随后截取每组试块... 详细信息

自密实钢纤维混凝土(SFRSCC)压缩性能表现和内部组分含量及分散状态均具有显著关联。为探究这种关联特性,定制不同组分配比的SFRSCC拌合物来浇筑制备棱柱体试块,并分别开展单调及循环压缩实验探索其压缩性能特性研究;随后截取每组试块的数个特征截面,采用粗骨料面积占比来描述粗骨料含量,将钢纤维含量及分散情况量化为Voronoi增韧面积统计值,并结合实测数据建立压缩力学特性和内部组分含量及分布特性之间的关联。参考上述关联特性,建立SFRSCC单调和循环压缩弹塑性损伤本构性能曲线方程。研究结果表明:粗骨料含量的增长提高了基体弹性模量和峰值强度,但骨料胶结难以抑制宏观裂缝的非稳定扩展;纤维数量的增加可减小钢纤维的增韧区域面积,从而能够延缓峰后塑性变形的累积,控制宏观裂缝生成,这种增韧效应和Voronoi增韧面积呈负相关,与增韧效率系数呈正相关;在自密实工艺下,钢纤维数量增加会抑制粗骨料含量的增长,需平衡Voronoi面积和粗骨料面积占比以满足增韧与增强需求。建立的SFRSCC单调和循环压缩弹塑性损伤本构性能曲线方程可实现不同组分分布下SFRSCC结构局部压缩性能的可靠分析。

关键词：钢纤维自密实混凝土钢纤维分布粗骨料分布 Voronoi面积循环受压弹塑性损伤

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Full-length transcriptome sequence and SSR marker development for genetic diversity research in yellowfin seabream Acanthopagrus latus

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Journal of Oceanology and limnology 2023年第3期41卷 1073-1083页

作者： Jin ZHANG Jinmei liU Chong HAN Cheng PENG Yong li Junhong XIA Yong ZHANG shuisheng li Haoran liN State Key Laboratory of Biocontrol Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic AnimalsSchool of Life SciencesSun Yat-Sen UniversityGuangzhou 510275China Zhuhai Modern Agriculture Development Center Zhuhai 519000China Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhou 510260China

Yellowfin seabream Acanthopagrus latus is an important economic fish in Chinese coastal *** its narrow distribution and overfishing,the genetic diversity of yellowfin seabream has been restricted for artificial breeding and *** performed full-length transcriptome sequencing and assembly of the genome of yellowfin seabream.A total of 68086 unigenes were obtained,with an N50 of 3391 bp on average length of 2933 bp.A total number of 50593 expressed sequence tags linked to simple sequence repeats(EST-SSR)were identified,among them dinucleotide repeats(40.6%)and AC/GT motifs(38.5%)were the most *** the 190 EST-SSRs for which PCR primer pairs were designed,150 primer pairs successfully amplified target loci and 15 SSRs showed high *** alleles per locus ranged 6-50 on average of *** expected and observed heterozygosity varied from 0.632 to 0.969 and from 0.519 to 0.953,*** polymorphic index content(PIC)values of each locus ranged 0.587-0.966 on average of *** six yellowfin seabream population samples preliminarily tested for genetic diversity and differentiation,the Fangchenggang(FCG)population in Guangxi Province had the highest mean observed heterozygosity(H_(o))value(0.786),whereas the Zhangzhou(ZZ)population in Fujian Province had the lowest(0.678).The pairwise fixation index(Fst)values indicated significant population differentiation among six yellowfin seabream *** study provided evidence for the usefulness of the transcriptomic resource information and EST-SSR markers for natural resource conservation,population genetics,and breeding studies of yellowfin seabream in South China.

关键词： yellowfin seabream Acanthopagrus latus full-length transcriptome expressed sequence tags linked to simple sequence repeats(EST-SSR)marker genetic diversity

Identification of potential sex-related genes in Siniperca chuatsi

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Journal of Oceanology and limnology 2021年第4期39卷 1500-1512页

作者： Qiaoying ZHU Chong HAN Cheng PENG Xingni ZHOU Chongwei WANG linqiang HAN shuisheng li Guifeng li Haoran liN Yong ZHANG State Key Laboratory of Biocontrol Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)School of Life SciencesSun Yat-Sen UniversityGuangzhou 510275China Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266373China Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationGuangdong Institute of Applied Biological ResourcesGuangzhou 510260China Guangdong liangshi Aquatic Seed Industry Co. Ltd.Foshan 528100China

Mandarin fish(Siniperca chuatsi)is an economically important freshwater fish cultured in *** this species,females grow faster than ***,due to the lack of available genomic and transcriptome information,the mechanisms of sex differentiation remain poorly *** this study,Illumina high-throughput sequencing technology was used to sequence four cDNA libraries;the tissues examined included hypothalamus,pituitary gland,ovary,and testis.A total of 134124 high-quality unigenes were obtained on average length of 1361 bp and N50 of 3312 bp.A search of all-unigene sequences against NR,NT,SwissProt,KOG,KEGG,GO,and InterPro databases resulted in 59688(44.50%),76329(56.91%),50432(37.60%),45741(34.10%),48760(36.35%),5241(3.91%),and 46099(34.37%)annotations,*** a comparison of ovarian and testicular libraries,15289 ovary-biased genes and 10035 testis-biased genes were identified,including a series of genes related to sex determination and differentiation,such as cyp19a1a,foxl2,sox9,dmrt1,amh,and *** addition,49495 SSRs and 85899 SNPs were detected in transcriptome *** real-time PCR results of 15 sex-related functional genes indicated that RNA-seq data was *** study will contribute to a better understanding of the molecular mechanisms of sex differentiation and development in Mandarin fish.

关键词： transcriptome Mandarin fish HPG axis female and male

Production of XX neo-male mandarin fish, Siniperca chuatsi, after sexual differentiation by oral administration of 17α-methyltestosterone

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Water Biology and Security 2023年第1期2卷 96-103页

作者： Jingjun Huang Shiyan liu Haofeng Ouyang Chong Han Meihui li linqiang Han shuisheng li Guifeng li Haoran lin Yong Zhang State Key Laboratory of Biocontrol and School of life Sciences Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic FishSun Yat-Sen UniversityGuangzhou510275PR China Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao266373PR China Guangdong liangshi Aquatic Seed Industry Co. LtdFoshan528100PR China

A well-known fact about mandarin fish(Siniperca chuatsi)is that females grow faster than *** fish that have all-female populations have economic advantages,but traditional neo-male fish are difficult to *** this study,indirect feeding of 500 mg/kg 17α-methyltestosterone(MT)to XX mandarin fish(60 dpf,days post fertilization)with completely differentiated ovaries induced secondary sex *** 40 days after MT treatment,14.7%of mandarin fish with complete reversal was produced,which showed for the first time that XX mandarin fishes with differentiated ovaries still have potentially bisexual germ cells and the plasticity of sex *** the MT treatment group,there was no significant difference in survival compared to the control *** body weight of the MT treatment group was significantly lower than that of the control group 40 days after treatment(dat)(Plinization of mandarin fish was also confirmed by the expression patterns of sex-specific genes sox9,dmrt1,cyp19a1a and foxl2.A significant amount of sox9 and dmrt1 was expressed in the fish gonads of the MT treatment group,whereas cyp19a1a and foxl2 were minimally expressed in the fish gonads.

关键词： 17α-methyltestosterone(MT) Mandarin fish Sex reversal Sex-specific genes

Efficient adsorption separation of methane from C_(2)-C_(3) hydrocarbons in a Co(Ⅱ)-nodes metal-organic framework

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Chinese Journal of Chemical Engineering 2024年第5期69卷 192-198页

作者： Jie Zhang Xingzhe Guo Bing lin Guangzu Xiong Hanshuang Wang Min Zhang liwen Fan Bingwen li shuisheng Chen Department of Chemistry and Chemical Engineering Taiyuan Institute of TechnologyTaiyuan 030008China Engineering Research Center of Oligosaccharides Fuyang Normal UniversityFuyang 236041China Shandong Key Laboratory of Biophysics Institute of BiophysicsDezhou UniversityDezhou 253023China

Methane(CH_(4))as a substitute for other mineral fuels plays a crucial role in reducing energy consumption and preventing environmental *** present study employs a solvothermal method to fabricate a porous framework Co-metal-organic framework(Co-MOF)containing two distinct secondary building units(SBUs):an anionic[Co_(2)(μ_(2)-OH)(COO)_(4)(H_(2)O)]and a neutral[CoN_(2)(COO)_(2)].Notably,within the anionic SBUs,the coordinated water molecules induce the generation of divergent unsaturated Co(Ⅱ)centers in the unidirectional porous channels,thereby creating open metal *** adsorption performance of Co-MOF towards pure component gases was systematically *** results demonstrated that Co-MOF exhibits superior adsorption capacity for C_(2)-C_(3) hydrocarbons compared to CH_(4),which offers the potential for efficient adsorption and separation of CH_(4) from C_(2)-C_(3) *** gas selectivity separation ratios of Co-MOF for C_(2)H_(6)/CH_(4) and C_(3)H_8/CH_(4) were calculated using the ideal adsorbed solution theory method at 273/298 K and 0.1 *** results revealed that Co-MOF achieved remarkable equilibrium separation selectivity for CH_(4) and C_(2)-C_(3) hydrocarbon gases among non-modified MOFs,signifying the potential of the synthesized Co-MOF for efficient recovery and purification of CH_(4) from C_(2)-C_(3) *** experiments further demonstrate the ability of Co-MOF to purify methane from C_(2)-C_(3) hydrocarbons in practical gas separation ***,molecular simulation calculations further substantiate the propensity of anionic SBUs to interact with C_(2)-C_(3) hydrocarbon *** study provides a novel paradigm for the development of porous MOF materials in the application of gas mixture separation.

关键词： Co-MOF Separation hydrocarbons Dynamic breakthrough curves Molecular simulations adsorbent Monte Carlo simulation