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Critical bubble radius in solvent sublation

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Chinese Chemical Letters 2007年第10期18卷 1293-1296页

作者： peng yu bi hui ru dong nan nan wang College of Science Beijing University of Chemical Technology Beijing 100029 People＇s Republic of China

The complex compound of dithizone-Co（Ⅱ） was separated and concentrated from the aqueous phase to n-octanol by solvent sublation. From the analysis of the coalescence behavior of bubbles on water-organic interface, the conception of critical bubble radius was proposed, and the value of the critical bubble radius in the water-octanol system was obtained： 1.196 × 10^-3 m. The simulation of the mathematical model using CBR and experimental data is completed with perfect results, and the simulation of the mathematical model using CBR is very different with the classic one. The analytical results proved that the critical bubble radius should be adequately considered in mathematical model of solvent sublation.

关键词： Solvent sublation Coalescence behavior Bubble Critical bubble radius

Effect of water droplet in solvent sublation

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Chinese Chemical Letters 2008年第5期19卷 623-626页

作者： peng yu bi hui ru dong nan nan wang College of Science Beijing University of Chemical Technology Beijing 100029 China

Aqueous phase layer around bubble and water droplet are two additional processes in solvent sublation. In the dynamic process of mass transfer, they are always neglected, but they are very important in the investigation of thermodynamic equilibrium. In this paper, the effect of water droplet in solvent sublation was discussed in detail, and the previous mathematical model of solvent subaltion was improved. Matlab 6.5 was used to simulate the process of water droplets, and the comparison between the previous hypothesis and the improvement in this paper showed the superiority, especially in the investigation of thermodynamic equilibrium. Moreover, the separation and concentration of the complex compound dithizone-Co（Ⅱ） from aqueous phase to n-octanol by solvent sublation also proved the improved mathematical model was reasonable.

关键词： Solvent sublation Water droplet Mathematical model

Development of remaining life prediction of crankshaft remanufacturing core

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Advances in Manufacturing 2013年第1期1卷 91-96页

作者： Li-Hong dong bin-Shi Xu nan Xue hui-peng wang Hao-yu Li Science and Technology on Remanufacturing Laboratory

This paper reviewed the main research work in the field of remaining life prediction of crankshaft remanufacturing core by Science and Technology on Remanu- facturing Laboratory. Based on the results of finite element analysis, the R angle zone of crankshaft was determined as a major measuring position. A special measuring probe is developed, and bending fatigue bench tests were carried out to collect electromagnetic damage information during fatigue process. A neural network model was established to identify damage degree of crankshaft core, and a damage evaluation equipment for crankshaft core was developed.

关键词： Remanufacturing Remaining life Crankshaft Metal magnetic memory Multi-frequency eddy current

Human bocavirus 1 and 2 genotype-specific antibodies for rapid antigen testing in pediatric patients with acute respiratory infections

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World Journal of Pediatrics 2023年第10期19卷 1009-1016页

作者： Ri De Yan-peng Xu Fang wang yu-Tong Zhou Pan-Deng Shi ru-nan Zhu yu Sun Li-Ying Liu Li-Ping Jia hui-Jin dong hui Zhao Cheng-Feng Qin Lin-Qing Zhao Laboratory of Virology Beijing Key Laboratory of Etiology of Viral Diseases in ChildrenCapital Institute of PediatricsBeijing 100020China State Key Laboratory of Pathogen and biosecurity Beijing Institute of Microbiology and EpidemiologyAcademy of Military Medical SciencesBeijing100071China

Background Previous serological studies of human bocavirus(HBoV)1 could not exclude cross-reactivity with the other three HBoVs,particularly *** To search for genotype-specific antibodies against HBoV1 and HBoV2,the divergent regions(DRs)located on the major capsid protein VP3 were defined through viral amino acid alignment and structure ***-deduced peptides were used as antigens to harvest corresponding anti-DR rabbit *** determine their genotype specificities for HBoV1 and HBoV2,these sera samples were used as antibodies against the antigens VP3 of HBoV1 and HBoV2(expressed in Escherichia coli)in western blotting(WB),enzyme-linked immunosorbent assay(ELISA),and bio-layer interferometry(BLI)***,the antibodies were evaluated with clinical specimens from pediatric patients with acute respiratory tract infection by indirect immunofluorescence assay(IFA).Results There were four DRs(DR1–4)located on VP3 with different secondary and tertiary structures between HBoV1 and *** the reactivity with VP3 of HBoV1 or HBoV2 in WB and ELISA,high intra-genotype cross-reactivity of anti-HBoV1 or HBoV2 DR1,DR3,and DR4,but not anti-DR2,was ***-specific binding capacity of anti-DR2 sera was confirmed by BLI and IFA,in which only anti-HBoV1 DR2 antibody reacted with HBoV1-positive respiratory *** Antibodies against DR2,located on VP3 of HBoV1 or HBoV2,were genotype specific for HBoV1 and HBoV2,respectively.

关键词： Divergent regions Genotype-specific antibody Human bocavirus 1 and 2 Major capsid protein VP3

A novel mechanism fusion data control method for slab camber in hot rolling

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Journal of Iron and Steel Research International 2023年第5期30卷 960-970页

作者： Le-bao Song dong Xu peng-fei Liu Jin-hang Zhou hui-qing Yan Jing-dong Li Hai-nan He Hai-jun yu Xiao-chen wang Quan Yang National Engineering Technology Research Center of Flat Rolling Equipment University of Science and Technology BeijingBeijing 100083China Xinjiang Joinworld Co. Ltd.Urumqi 830000XinjiangChina 2250 Hot Strip Mill Hunan Lianyuan Iron and Steel Co.Ltd.Loudi 417000HunanChina

For asymmetric plate shape,control over the hot rolling process mainly depends on the subjective judgement and personal experience of the operator as there are great deviations and much instability in hot ***,the intrinsic mechanisms and sensitivity affecting characteristic parameters and variables in the asymmetric rolling process remain ***,a novel mechanism fusion data control method for slab camber in hot rolling using dimensional analysis and data-driven technique was *** approach of dimensional analysis was used to establish a mathematical model and analyse the main parameters affecting the slab camber of the rough ***,the established mathematical model combined with the data-driven techniques was employed to accurately predict the slab bending ***,the superiority and effectiveness of the proposed model were demonstrated by a comparison with three regression ***,the proposed control strategy was successfully applied in a 1580 mm hot rolling industrial *** automatic control results show that the hit rate of slab cambers in different sizes from 10 to 30 mm is improved,and the quality stability of intermediate slab is significantly improved.

关键词： Mechanism model Dimensional analysis Data-driven technique Camber control Hot rolling

Predicting hepatocellular carcinoma: A new non-invasive model based on shear wave elastography

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World Journal of Gastroenterology 2024年第25期30卷 3166-3178页

作者： dong Jiang Yi Qian Yi-Jun Gu ru wang Hua yu hui dong dong-yu Chen Yan Chen Hao-Zheng Jiang bi-Bo Tan Min peng Yi-Ran Li Department of Ultrasound Eastern Hepatobiliary Surgery HospitalThe Third Affiliated Hospital of Naval Medical UniversityShanghai 200433China Department of Pathology Shanghai Eastern Hepatobiliary Surgery HospitalThird Affiliated Hospital of Naval Medical UniversityShanghai 200433China Department of College of Art and Science Case Western Reserve UniversityClevelandOH 44106United States Ultrasound Diagnosis PLA Naval Medical CenterShanghai 200437China

BACKGROUND Integrating conventional ultrasound features with 2D shear wave elastography(2D-SWE)can potentially enhance preoperative hepatocellular carcinoma(HCC)*** To develop a 2D-SWE-based predictive model for preoperative identification of *** A retrospective analysis of 884 patients who underwent liver resection and pathology evaluation from February 2021 to August 2023 was conducted at the Oriental Hepatobiliary Surgery *** patients were divided into the modeling group(n=720)and the control group(n=164).The study included conventional ultrasound,2D-SWE,and preoperative laboratory *** logistic regression was used to identify independent predictive factors for RESULTS In the modeling group analysis,maximal elasticity(Emax)of tumors and their peripheries,platelet count,cirrhosis,and blood flow were independent risk indicators for *** factors yielded an area under the curve of 0.77(95%confidence interval:0.73-0.81)with 84%sensitivity and 61%*** model demonstrated good calibration in both the construction and validation cohorts,as shown by the calibration graph and Hosmer-Lemeshow test(P=0.683 and P=0.658,respectively).Additionally,the mean elasticity(Emean)of the tumor periphery was identified as a risk factor for microvascular invasion(MVI)in malignant liver tumors(P=0.003).Patients receiving antiviral treatment differed significantly in platelet count(P=0.002),Emax of tumors(P=0.033),Emean of tumors(P=0.042),Emax at tumor periphery(Pnant liver lesions,correlating significantly with MVI and antiviral treatment efficacy.

关键词： Shear wave elastography Predicting model Microvascular invasion Antiviral treatment Hepatocellular carcinoma

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光谱法分析乙丙共聚物的序列结构及链节比

高等学校化学学报 2006年第5期27卷 961-965页

作者：董慧茹陶红王楠楠毕鹏禹北京化工大学理学院北京100029

用FTIR,1H NMR和13C NMR分析乙丙共聚物的序列结构与链节比.通过对乙丙共聚物1H NMR,13C NMR和13C1-H二维核磁共振谱的综合分析,提出了与前人不同的归属,并提出了不同位置碳原子积分面积相关性分析方法,该方法避免了烦琐的理论计算,可... 详细信息

用FTIR,1H NMR和13C NMR分析乙丙共聚物的序列结构与链节比.通过对乙丙共聚物1H NMR,13C NMR和13C1-H二维核磁共振谱的综合分析,提出了与前人不同的归属,并提出了不同位置碳原子积分面积相关性分析方法,该方法避免了烦琐的理论计算,可简便地得到乙丙共聚物的主要序列结构.通过比较1H NMR和13C NMR计算乙丙共聚物中乙烯、丙烯链节比,表明可以用1H NMR代替13C NMR完成对乙丙共聚物中乙烯、丙烯链节比的定量计算.

关键词：核磁共振谱红外光谱乙丙共聚物序列结构链节比

Evaluation of the Safety and Immune Efficacy of Recombinant Human Respiratory Syncytial Virus Strain Long Live Attenuated Vaccine Candidates

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Virologica Sinica 2021年第4期36卷 706-720页

作者： Li-nan wang Xiang-Lei peng Min Xu yuan-Bo Zheng yue-Ying Jiao Jie-Mei yu yuan-hui Fu Yan-peng Zheng Wu-Yang Zhu Zhong-Jun dong Jin-Sheng He College of Life Sciences and bioengineering School of ScienceBeijing Jiaotong UniversityBeijing100044China National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijing102206China School of Medicine and Institute for Immunology Beijing Key Lab for Immunological Research on Chronic DiseasesTsinghua UniversityBeijing100084China

Human respiratory syncytial virus(RSV)infection is the leading cause of lower respiratory tract illness(LRTI),and no vaccine against LRTI has proven to be safe and effective in *** study assessed attenuated recombinant RSVs as vaccine candidates to prevent RSV infection in *** constructed recombinant plasmids harbored(5′to 3′)a T7 promoter,hammerhead ribozyme,RSV Long strain antigenomic cDNA with cold-passaged(cp)mutations or cp combined with temperature-sensitive attenuated mutations from the A2 strain(A2cpts)or further combined with SH gene deletion(A2cptsΔSH),HDV ribozyme(δ),and a T7 *** vectors were subsequently co-transfected with four helper plasmids encoding N,P,L,and M2-1 viral proteins into BHK/T7-9 cells,and the recovered viruses were then passaged in Vero *** rescued recombinant RSVs(rRSVs)were named rRSV-Long/A2cp,rRSV-Long/A2cpts,and rRSV-Long/A2cptsΔSH,respectively,and stably passaged in vitro,without reversion to wild type(wt)at sites containing introduced mutations or *** rRSV-Long/A2cpts and rRSV-Long/A2cptsΔSH displayed temperature-sensitive(ts)phenotype in vitro and in vivo,all rRSVs were significantly attenuated in ***,BALB/c mice immunized with rRSVs produced Th1-biased immune response,resisted wtRSV infection,and were free from enhanced respiratory *** showed that the combination ofΔSH with attenuation(att)mutations of cpts contributed to improving att phenotype,efficacy,and gene stability of *** successfully introducing att mutations and SH gene deletion into the RSV Long parent and producing three rRSV strains,we have laid an important foundation for the development of RSV live attenuated vaccines.

关键词： Human respiratory syncytial virus(RSV) RSV long strain Live attenuated vaccine Safety Protective immunity

Realizing n-type GeSe thermoelectrics:boosting solubility of donor dopants by enhancing crystal symmetry

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Rare Metals 2024年第12期43卷 6583-6595页

作者： Xiao-Huan Luo Jia-hui Cheng bing-Cai Duan Mo-Ran wang yu-Wei Zhou Tu Lyu Chao-Hua Zhang Sheng-nan Zhang Fu-Sheng Liu Li-peng Hu Shenzhen Key Laboratory of Special Functional Materials Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Guangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringInstitute of Deep Earth Sciences and Green Energy Shenzhen University Superconducting Materials Research Center Northwest Institute for Nonferrous Metal Research

The successful deployment of thermoelectric materials necessitates the concurrent development of highperformance p-type and n-type pairs situated within an identical ***,limiting by the low dopant solubility,the conventional doping often cannot transfer the Fermi level to the opposite carrier ***,the solubility limit of donor dopants was enhanced to achieve n-type GeSe by inducing additional cationic vacancies through raising crystal *** the intrinsic p-type nature of GeSe to n-type poses significant challenges,primarily due to the exceedingly low dopant solubility within its native orthorhombic *** overcome this,the In2Te3 alloying was initially employed to transition GeSe from orthorhombic to rhombohedral structure,simultaneously generating a large number of Ge *** this,the introduction of Pb acts to mitigate the excessive Ge vacancies,steering the material toward a weak p-type ***,the elevated Ge vacancy concentration serves to extend the solubility limit of bi donor dopant,which not only promotes the formation of cubic phase,but also enables the p-n type *** a result,a peak zT of 0.18 at 773 K was attained for the n-type cubic Ge0.55bi0.2Pb0.25Se（In2Te3）0.1,marking an18-fold enhancement in comparison with its n-type orthorhombic *** work attests to the efficacy of introducing vacancies through enhancing crystal symmetry as an effective means to expand dopant solubility,thereby offering valuable insights into the achievement of compatible p-and n-type chalcogenides within the same matrix.

关键词： Cationic vacancy Crystal symmetry GeSe Solubility Thermoelectric