检索结果-南通市图书馆

Multisymplectic Fourier pseudo-spectral integrators for Klein-Gordon-Schrdinger equations

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2013年第5期56卷 915-932页

作者： KONG LingHua WANG Lan JIANG ShanShan duan yali School of Mathematics and Information Science Jiangxi Normal University School of Science Beijing University of Chemical Technology School of Mathematics University of Science and Technology of China

A multisymplectic Fourier pseudo-spectral scheme, which exactly preserves the discrete multisym- plectic conservation law, is presented to solve the Klein-Gordon-SchrSdinger equations. The scheme is of spectral accuracy in space and of second order in time. The scheme preserves the discrete multisymplectic conservation law and the charge conservation law. Moreover, the residuals of some other conservation laws are derived for the geometric numerical integrator. Extensive numerical simulations illustrate the numerical behavior of the multisymplectic scheme, and demonstrate the correctness of the theoretical analysis.

关键词： Klein-Gordon-SchrSdinger equations multisymplectic integrator Fourier pseudo-spectral meth- od. conservation law. soliton

Fluorometric Discrimination Technique of Phytoplankton Population Based on Wavelet Analysis

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2012年第3期11卷 339-346页

作者： ZHANG Shanshan SU Rongguo duan yali ZHANG Cui SONG Zhijie WANG Xiulin Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationOcean University of ChinaQingdao266100P.R.China College of Information Science and Engineering Ocean University of ChinaQingdao 266100P.R.China

The discrete excitation-emission-matrix fluorescence spectra (EEMS) at 12 excitation wavelengths (400, 430, 450, 460, 470, 490, 500, 510, 525, 550, 570, and 590 nm) and emission wavelengths ranging from 600-750 nm were determined for 43 phytoplankton species. A two-rank fluorescence spectra database was established by wavelet analysis and a fluorometric discrimination technique for determining phytoplankton population was developed. For laboratory simulatively mixed samples, the samples mixed from 43 algal species (the algae of one division accounted for 25%, 50%, 75%, 85%, and 100% of the gross biomass, respectively), the average discrimination rates at the level of division were 65.0%, 87.5%, 98.6%, 99.0%, and 99.1%, with average relative contents of 18.9%, 44.5%, 68.9%, 73.4%, and 82.9%, respectively; the samples mixed from 32 red tide algal species (the dominant species accounted for 60%, 70%, 80%, 90%, and 100% of the gross biomass, respectively), the average correct discrimination rates of the dominant species at the level of genus were 63.3%, 74.2%, 78.8%, 83.4%, and 79.4%, respectively. For the 81 laboratory mixed samples with the dominant species accounting for 75% of the gross biomass (chlorophyll), the discrimination rates of the dominant species were 95.1% and 72.8% at the level of division and genus, respectively. For the 12 samples collected from the mesocosm experiment in Maidao Bay of Qingdao in August 2007, the dominant species of the 11 samples were recognized at the division level and the dominant species of four of the five samples in which the dominant species accounted for more than 80% of the gross biomass were discriminated at the genus level; for the 12 samples obtained from Jiaozhou Bay in August 2007, the dominant species of all the 12 samples were recognized at the division level. The technique can be directly applied to fluorescence spectrophotometers and to the developing of an in situ algae fluorescence auto-analyzer for phytoplankton

关键词： phytoplankton population 3D discrete fluorescence spectra wavelet analysis two-rank database discrimination

Fluorescence Discrimination and Determination Technique for Phytoplankton Composition by Coif2 Wavelet Packet

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2013年第1期12卷 53-62页

作者： duan yali SU Rongguo SHI Xiaoyong WANG Xiulin ZHU Chenjian SUN Yan College of Chemistry and Chemical Engineering Ocean University of China Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Taiyuan University of Technology

An in vivo fluorescence discrimination technique for phytoplankton population was developed by using Wavelet packet transform, cluster analysis and non-negative least squares. The technique was used to analyze water samples from different sea regions. For simulative mixtures, when dominant species account for 60%, 70%, 80%, 90% at the division level, the correct discrimination ratios (CDRs) are 83.0%, 99.1%, 99.7% and 99.9% with the relative contents of 58.5%, 68.4%, 77.7% and 86.3%, respectively; when the algae dominance are 60%, 70%, 80%, 90%, 100% at the genus level, the CDRs are 86.1%, 94.9%, 95.2%, 96.8% and 96.7%, respectively. For laboratory mixtures, the CDRs are 88.1% and 78.4% at the division and genus level, respectively. For field samples, the CDRs were 91.7% and 80% at the division and genus level, respectively (mesocosm experiments), and the CDRs were 100% and 66.7% at the division and genus level, respectively (Jiaozhou Bay). The fluorometric technique was used to estimate the phytoplankton community composition and relative abundance of different classes for the April 2010 cruise in the Yellow Sea with the results agreeing with those in published papers by other authors.

关键词： phytoplankton species wavelet packet transform feature spectra norm spectra database discrimination

Autophagy induced by human adenovirus B7 structural protein VI inhibits viral replication

在线全文

学校读者我要写书评

暂无评论

Virologica Sinica 2023年第5期38卷 709-722页

作者： Linlin Zhang yali duan Wei Wang Qi Li Jiao Tian Yun Zhu Ran Wang Zhengde Xie Beijing Key Laboratory of Pediatric Respiratory Infectious Diseases Key Laboratory of Major Diseases in ChildrenMinistry of EducationNational Clinical Research Center for Respiratory DiseasesLaboratory of Infection and VirologyBeijing Pediatric Research InstituteBeijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthBeijing100045China Research Unit of Critical Infection in Children 2019RU016Chinese Academy of Medical SciencesBeijing100045China Department of Infectious Diseases Beijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthBeijing100045China Beijing Coal Group General Hospital Beijing100045China

Human adenovirus B7(HAdV-B7)causes severe acute lower respiratory tract infections in ***,neither the child-specific antivirals or vaccines are available,nor the pathogenesis is ***,as part of innate immunity,plays an important role in resistance to viral infection by degrading the virus and promoting the development of innate and adaptive *** study provided evidence that HAdV-B7 infection induced complete autophagic flux,and the pharmacological induction of autophagy decreased HAdV-B7 *** this process,the host protein Bcl2-associated athanogene 3(BAG3)mediated autophagy to inhibit the replication of HAdV-B7 by binding to the PPSY structural domain of viral protein pVI through its WW structural *** findings further our understanding of the host immune response during viral infection and will help to develop broad anti-HAdV therapies.

关键词： Human adenovirus B7(HAdV-B7) Autophagy Bcl2-associated athanogene 3(BAG3) Virus replication

Genetic Analysis of Human Adenovirus Type 7 Strains Circulating in Different Parts of China

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Virologica Sinica 2021年第3期36卷 382-392页

作者： yali duan Changchong Li Li Deng Shuhua An Yun Zhu Wei Wang Meng Zhang Lili Xu Baoping Xu Xiangpeng Chen Zhengde Xie Beijing Key Laboratory of Pediatric Respiratory Infection Diseases Key Laboratory of Major Diseases in ChildrenMinistry of EducationNational Clinical Research Center for Respiratory DiseasesResearch Unit of Critical Infection in ChildrenChinese Academy of Medical Sciences2019RU016Laboratory of Infection and VirologyBeijing Pediatric Research InstituteBeijing Children’s HospitalCapital Medical UniversityNational Center for Children's HealthBeijing 100045China The 2nd Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University Wenzhou 325027China Guangzhou Women and Children's Medical Center Guangzhou 510623China Children's Hospital of Hebei Province Shijiazhuang 050031China

To investigate the molecular epidemiology and genetic variation of human adenovirus type 7(HAdV-7)in children with acute respiratory infections(ARI)in ***-7-positive respiratory samples collected from children with ARI in Beijing,Shijiazhuang,Wenzhou and Guangzhou from 2014–2018 were selected for gene amplification and sequence ***-seven HAdV-7 clinical strains with hexon,penton base and fiber gene sequences were ***17 strains were selected randomly from different cities for whole genome *** and variation analyses were performed based on the obtained sequences,HAdV-7 prototype strain Gomen(AY594255),vaccine strains(AY495969 and AY594256)and representative sequences of *** phylogenetic trees constructed based on whole genome sequences,major capsid protein genes(hexon,penton base and fiber)and the early genes(E1,E2,E3 and E4)were not completely *** HAdV-7 strains obtained in this study always clustered with most of the circulating strains worldwide from the 1980 s to the *** with the HAdV-7 prototype strain Gomen(AY594255),some amino acid mutations in loop1 and loop2 of hexon and the RGD loop region of the penton base gene were *** analysis showed that partial regions of 55 k Da protein and 100 kDa hexon-assembly associated protein genes among all HAdV-7 strains in this study were from HAdV-16 and HAdV-3,*** study demonstrated the molecular evolution characteristics of HAdV-7 strains circulating in China and provided basic reference data for the prevention,control and vaccine development of HAdV-7.

关键词： Human adenovirus type 7(HAdV-7) Genome-wide sequence analysis Mutation Genetic recombination

A High Sensitivity Pressure Sensor Based on Two-Dimensional Photonic Crystal

在线全文

学校读者我要写书评

暂无评论

Photonic Sensors 2016年第2期6卷 137-142页

作者： Shangbin TAO Deyuan CHEN Juebin WANG Jing QIAO yali duan Nangjing University of Posts and Telecommunications Nanjing 210009 China

In this paper, we propose and simulate a pressure sensor based on two-dimensional photonic crystal with the high quality factor and sensitivity. The sensor is formed by the coupling of two photonic crystal based waveguides and one nanocavity. The photonic crystal withthe triangular lattice is composed of GaAs rods. The detailed structures of the waveguides and nanocavity are optimized to achieve better quality factor and sensitivity of the sensor. For the optimized structures, the resonant wavelength of the sensor has a linear redshift as increasing the applied pressure in the range of 0 - 2 GPa, and the quality factor keeps unchanged nearly. The optimized quality factor is around 1500, and the sensitivity is up to 13.9nm/GPa.

关键词： Photonic crystal waveguide nanocavity pressure sensor

Enhancing the Photosensitivity of Hypocrellin A by Perylene Diimide Metallacage‑Based Host–Guest Complexation for Photodynamic Therapy

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第11期16卷 71-87页

作者： Rongrong Li Tianfeng Yang Xiuhong Peng Qian Feng yali Hou Jiao Zhu Dake Chu Xianglong duan Yanming Zhang Mingming Zhang State Key Laboratory for Mechanical Behavior of Materials Shaanxi International Research Center for Soft MatterSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Pharmacy Health Science CenterXi’an Jiaotong UniversityXi’an 710061People’s Republic of China Department of Rehabilitation Medicine Shaanxi Provincial People’s HospitalXi’an 710068ShaanxiPeople’s Republic of China Department of Gastroenterology The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061People’s Republic of China

The development of supramolecular hosts which can efficiently encapsulate photosensitizers to improve the photodynamic efficacy holds great promise for cancer ***,we report two perylene diimide-based metallacages that can form stable host–guest complexes with planar conjugated molecules including polycyclic aromatic hydrocarbons and photosensitizers(hypocrellin A).Such host–guest complexation not only prevents the aggregation of photosensitizers in aqueous environments,but also offers fluorescence resonance energy transfer(FRET)from the metallacage to the photosensitizers to further improve the singlet oxygen generation(Φ_(Δ)=0.66).The complexes are further assembled with amphiphilic polymers,forming nanoparticles with improved stability for anticancer *** in vitro and in vivo studies indicate that the nanoparticles display excellent anticancer activities upon light irradiation,showing great potential for cancer photodynamic *** study provides a straightforward and effective approach for enhancing the photosensitivity of conventional photosensitizers via host–guest complexation-based FRET,which will open a new avenue for host–guest chemistry-based supramolecular theranostics.

关键词： Metallacages Host-guest interactions Fluorescence resonance energy transfer Singlet oxygen Photodynamic therapy

时效处理对汽车用镁基复合材料显微结构和性能的影响

在线全文

学校读者我要写书评

暂无评论

热加工工艺 2016年第22期45卷 135-137页

作者：段亚丽内蒙古交通职业技术学院内蒙古赤峰024005

研究了时效处理时间对SiC/AZ81镁基复合材料显微结构和性能的影响。结果表明,随着时效时间的延长,SiC/AZ81镁基复合材料中β-Mg_(17)Al_(12)析出相数量先增多后减少,析出相尺寸先减小后增大;不同时效处理时间下SiC/AZ81镁合金基复合材... 详细信息

研究了时效处理时间对SiC/AZ81镁基复合材料显微结构和性能的影响。结果表明,随着时效时间的延长,SiC/AZ81镁基复合材料中β-Mg_(17)Al_(12)析出相数量先增多后减少,析出相尺寸先减小后增大;不同时效处理时间下SiC/AZ81镁合金基复合材料中均无其他新相生成;复合材料的压缩屈服强度先增大后减小,当时效时间为20 h时,复合材料的压缩屈服强度达到最大值,为182.1 MPa;SiC/AZ81镁合金基复合材料的磨损率先增大后减小,当时效时间为16 h时,SiC/AZ81镁合金基复合材料具有最高的磨损率。因此,最佳时效时间为16 h。

关键词：时效时间显微结构屈服强度磨损率

点焊工艺参数对汽车用镁铝异种合金接头组织和性能的影响

在线全文

学校读者我要写书评

暂无评论

电焊机 2014年第11期44卷 166-168页

作者：段亚丽内蒙古交通职业技术学院内蒙古赤峰024005

采用电阻点焊实现了对镁铝异种金属的焊接,研究了焊接压力、焊接电流、焊接时间对Mg/Al点焊接头组织和力学性能的影响。结果表明,随着焊接压力、焊接电流和焊接时间的增加,Mg/Al异种金属点焊接头拉剪力先增加后减小;熔核晶粒尺寸随着焊... 详细信息

采用电阻点焊实现了对镁铝异种金属的焊接,研究了焊接压力、焊接电流、焊接时间对Mg/Al点焊接头组织和力学性能的影响。结果表明,随着焊接压力、焊接电流和焊接时间的增加,Mg/Al异种金属点焊接头拉剪力先增加后减小;熔核晶粒尺寸随着焊接电流的增大、焊接时间的延长而增大;焊接压力7 k N、焊接电流40 k A、焊接时间100 ms时,Mg/Al异种金属点焊接头拉剪力达到最大值3.3 k N。

关键词：镁铝电阻点焊拉剪力