检索结果-南通市图书馆

Green Energy & Environment 2017年第4期2卷 419-427页

作者： Peng wang Xia Chen dong-liang wang Yong-Qi Li Ye Liu Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University

The phosphine-functionalized phosphonium-based ionic liquids(dppm-Q, dppe-Q, dppp-Q and dppb-Q) as the bi-functional ligands enable the efficient one-pot tandem hydroformylationeacetalization. It was found that, in dppm-Q, dppe-Q, dppp-Q and dppb-Q, the incorporated phosphino-fragments were responsible for Rh-catalyzed hydroformylation and the phosphoniums were in charge of the subsequent acetalization as the Lewis acid catalysts. Moreover, the diphosphonium-based ionic liquid of dppb-DQ could be applied as a co-solvent to immobilize the Rh/dppb-Q catalytic system with the advantages of the improved catalytic performance, the available catalyst recyclability, and the wide generality for the substrates.

关键词： Phosphines Phosphonium-based ionic liquids Bi-functional ligands Recyclability of homogeneous catalysts Tandem hydroformylationeacetalization

The Mining of Citrus EST-SNP and Its Application in Cultivar Discrimination

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Agricultural Sciences in China 2010年第2期9卷 179-190页

作者： JIANG dong YE Qing-liang wang Fu-sheng CAO Li Citrus Research Institute Chinese Academy of Agricultural Sciences Chongqing 400712 P.R.China

Single nucleotide polymorphisms （SNPs） are the most abundant sequence variations found in plant genomes and are widely used as molecular genetic markers in cultivar identification and genetic diversity studies. The objective of this study was to identify SNP markers useful for discrimination of citrus cultivars, since large numbers of expressed sequence tags （ESTs） of sweet orange are available from the National Center for Biotechnology Information （NCBI）. We now have the opportunity to discover SNP markers suitable for determining the haplotypes with which to distinguish very closely related cultivars and to assess genetic diversity within or between related species of citrus. SNPs and small insertions/deletions （Indels） from ESTs of sweet orange and satsuma were identified by the in silico SNP discovery strategy. 55 296 EST sequences of sweet orange and 2 575 of satsuma retrieved from the NCBI repository were mined for potential SNPs. Cleaved amplified polymorphic sequences （CAPS） and sequencing approaches were used to validate putative SNPs in a sample of 30 citrus accessions. A total of 3 348 putative SNPs were identified based on the abundance of sequences and haplotype cosegregation. Of these 3 348 SNPs, the transitions, transversions and Indels ratios were 47.9, 36.1 and 16.0%, respectively. The SNPs occurred on average at a frequency of 1 per 164 bp in the coding region of citrus. 14 SNPs were randomly selected and genotyped according to 30 citrus accessions including 23 accessions of sweet orange; 11 SNPs displayed polymorphism with an average polymorphism information content （PIC） of 0.20 among 30 citrus accessions. The genetic diversity present in sweet orange was low, so the 14 SNP markers failed to discriminate different cultivars of sweet orange, but they did succeed in distinguishing accessions of inter-species of citrus. In this study, SNPs were mined from EST sequences of sweet orange and satsuma, which displayed potential capability as molecular ma

关键词： citrus single nucleotide polymorphisms (SNPs) EST-SNP cleaved amplified polymorphic sequences (CAPS)

Comprehensive analysis of distal-less homeobox family gene expression in colon cancer

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World Journal of Gastrointestinal Oncology 2023年第6期15卷 1019-1035页

作者： Yong-Cheng Chen dong-Bing Li dong-liang wang Hui Peng Department of General Surgery(Endoscopic Surgery) The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655Guangdong ProvinceChina Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655Guangdong ProvinceChina Biomedical Innovation Center The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655Guangdong ProvinceChina Department of Medicine ChosenMed Technology(Beijing)Co.Ltd.Beijing 100176China Department of General Surgery(Anorectal Surgery) The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655Guangdong ProvinceChina

BACKGROUND The distal-less homeobox(DLX)gene family plays an important role in the development of several ***,the expression pattern,prognostic and diagnostic value,possible regulatory mechanisms,and the relationship between DLX family genes and immune infiltration in colon cancer have not been systematically *** We aimed to comprehensively analyze the biological role of the DLX gene family in the pathogenesis of colon *** Colon cancer tissue and normal colon tissue samples were collected from the Cancer Genome Atlas and Gene Expression Omnibus *** rank sum test and t-test were used to assess DLX gene family expression between colon cancer tissue and unpaired normal colon *** was used to analyze DLX gene family variants.R software was used to analyze DLX gene expression in colon cancer and the relationship between DLX gene family expression and clinical features and correlation heat *** survival package and Cox regression module were used to assess the prognostic value of the DLX gene *** pROC package was used to analyze the diagnostic value of the DLX gene family.R software was used to analyze the possible regulatory mechanisms of DLX gene family members and related *** GSVA package was used to analyze the relationship between the DLX gene family and immune *** ggplot2,the survminer package,and the clusterProfiler package were used for *** DLX1/2/3/4/5 were significantly aberrantly expressed in colon cancer *** expression of DLX genes were associated with M stage,pathologic stage,primary therapy outcome,residual tumor,lymphatic invasion,T stage,N stage,age,perineural invasion,and history of colon ***5 was independently correlated with the prognosis of colon cancer in multivariate ***1/2/3/4/5/6 were involved in the development and progression of colon cancer by participating in immune infiltration and associated pathways,including the

关键词： Colon cancer The Cancer Genome Atlas Distal-less homeobox genes Prognosis Immune infiltration

Properties of seven-filament Cu/Ag-sheathed(Ba,K)Fe_(2)As_(2)tapes fabricated from round and square wires

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Rare Metals 2021年第12期40卷 3651-3659页

作者： Zhen-Kun Jin Cong Liu Chao Yao Liu Li He Huang dong-liang wang Chi-Heng dong Kai wang Xian-Ping Zhang Satoshi Awaji Yan-Wei Ma Key Laboratory of Applied Superconductivity Institute of Electrical EngineeringChinese Academy of SciencesBeijing 100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China High Field Laboratory for Superconducting Materials Institute for Materials ResearchTohoku UniversitySendai 980-8577Japan

Iron-based superconductor,a promising candidate for high-field applications,has attracted significant *** practical utilization,the superconducting tapes should have high transport critical current density(J_(c)),low production cost,larger mechanical strength and good *** this study,seven-filament Cu/Agsheathed(Ba,K)Fe_(2)As_(2)tapes were fabricated from round and square *** is found that the tapes rolled from square wires have a desirable uniformity of filament deformation and distribution,compared with the ones rolled from round ***,the J_c of tape was obviously improved by using square drawing dies instead of traditional round *** the tapes rolled from square wires annealed under ambient and 2 MPa by hot pressing,the transport J_c values reached 1.51×10^(4) A·cm^(-2)and 4.86×10^(4) ***^(-2)(4.2K,10T),*** deformation process on the cross section of the tapes during rolling was analyzed by using the powder-flow *** results indicate a potential application of Cu/Ag(Ba,K)Fe_(2)As_(2)tapes in high-magnetic-field region.

关键词： Iron-based superconductor Multi-filament tape Cu/Ag sheath Square drawing dies Critical current density Powder-flow model

Mechanical Behavior and Failure Mechanism of an As-Extruded Mg-11wt%Y Alloy at Elevated Temperature

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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 969-981页

作者： Lan Zhang Dao-Kui Xu Bao-Jie wang Cui-Lan Lu Shuo wang Xiang-Bo Xu dong-liang wang Xin Lv En-Hou Han School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Environmental and Chemical Engineering Shenyang Ligong UniversityShenyang110159China Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang110819China Institute of Corrosion Science and Technology Guangdong510070China

Through carrying out the high-temperature tensile experiments on an as-extruded Mg-11wt%Y alloy at 350℃,400℃,450℃,500℃and 550℃,the mechanical behavior and fracture mechanisms at elevated temperatures are investigated and *** results show that with the increase of temperature,the yield strength and ultimate tensile strength of the alloy increase at first and then decrease,while that the elongation ratio decreases firstly and then *** the sample being tested at 350℃,the values of yield strength,ultimate tensile strength and the elongation ratio are 188 MPa,266 MPa and 11%,*** 400℃,the yield strength and ultimate tensile strength reach the maximum values of,respectively,198 MPa and 277 MPa,but the elongation ratio is the lowest and its value is only 8%.When the applied temperature is increased to 550℃,the values of yield strength and ultimate tensile strength,respectively,decrease to 140 MPa and 192 MPa and the elongation ratio increases to 38%.Failure analysis demonstrates that the fracture surfaces of different samples are mainly composed of plastic dimples and exhibit the typical characteristic of ductile *** observation to the fracture side surfaces indicates that at the temperatures of 350℃and 400℃,microcracks mainly initiate in the interior of Mg_(24)Y_(5)*** the temperatures are 450℃,500℃and 550℃,the cracks preferentially initiate at the Mg_(24)Y_(5)/α-Mg interfaces.

关键词： Mg-Y alloy High-temperature tensile properties Fracture mechanism Failure analysis

Synthesis and characterization of SBA-15 macrospheres with hierarchical pore structure

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Chinese Chemical Letters 2009年第11期20卷 1371-1375页

作者： dong liang Yan wang Jing Hong Ma Jian Hong Liu Shu Wei Chen Rui Feng Li Key Laboratory of Coal Science and Technology MOE College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China

The new macroscopic-scale SBA-15 spheres with diameter of 0.2-0.5 mm are prepared by a sol-gel method, in which the tetrabutylorthosilicate （TBOS） is used as silicon source and triblock copolymer （P123） and polyoxyethylene octylphenol ether （OP- 10） are used as templates. The resulting spherical samples are characterized by XRD, N2 adsorption-desorption, TEM and SEM methods. The results show that the inner structure of SBA-15 macrospheres has macroporous channels （0.5 um） and mesoporous skeleton （4-5 nm）. These SBA-15 macrospheres with the hierarchical pore structure demonstrate high absorption capacity for Emodin molecules.

关键词： Nanostructures Sol-gel growth Electron microscopy Adsorption

Diagnosis and treatment of an elderly patient with 2019-nCoV pneumonia and acute exacerbation of chronic obstructive pulmonary disease in Gansu Province:A case report

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World Journal of Clinical Cases 2020年第17期8卷 3903-3910页

作者： Tian-Peng He dong-liang wang Jing Zhao Xiao-Ying Jiang Jin He Jian-Ke Feng Yuan Yuan First Department of Critical Care Medicine Gansu Provincial HospitalLanzhou 730000Gansu ProvinceChina Department of Medical Gansu Provincial HospitalLanzhou 730000Gansu ProvinceChina Department of Medical Infectious Diseases of Gansu Provincial HospitalTianshui 741024Gansu ProvinceChina

BACKGROUND In December 2019,the first patient with 2019-novel coronavirus(2019-nCoV)was reported in Wuhan,China,and the disease spread rapidly across the country and surrounding countries within 2 *** of February 29,2020,a total of 91 confirmed cases had been reported in Gansu *** case report of the diagnosis and treatment of an elderly patient with 2019-nCoV pneumonia complicated by acute exacerbation of chronic obstructive pulmonary disease in Gansu Province aims to provide a better reference for the treatment of patients in the *** SUMMARY The patient,a 94-year-old female,lived in Maiji District of Tianshui,Gansu Province,*** January 30,2020,she was admitted to the Fourth People’s Hospital of Tianshui after 9 d of close contact with a patient with 2019-nCoV *** was subsequently admitted to Gansu Provincial Hospital of Traditional Chinese Medicine for isolation and transferred to Tianshui Gansu Provincial Hospital of Infectious Diseases on February 3,2020 for *** initial examination,her body temperature was 36.7°C,pulse was 80,breathing was 20,and blood pressure was 130/80 *** was conscious with normal development and normal *** pharynx was not red,and bilateral tonsils were not red and *** lungs sounded slightly coarse with no dry or wet *** first symptoms were cough and fatigue on 2 *** patient was hospitalized for 12 *** active treatment,she was discharged on February 14 with a good *** A history of exposure to the affected area or patient is a major cause of 2019-nCoV infection,and population clustering is a high risk factor for *** may not necessarily have respiratory system symptoms as the only clinical manifestation but may also have concomitant or first onset digestive *** should be paid to the prevention and treatment of multiple organ dysfunction *** acid testing is extremely important and needs to be repe

关键词： 2019-nCoV pneumonia Acute exacerbation of chronic obstructive pulmonary disease Epidemiological investigation Clinical manifestations Integrated Chinese and Western medicine treatment

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基于最大化子模和RRWM的视频协同分割

自动化学报 2016年第10期42卷 1532-1541页

作者：苏亮亮唐俊梁栋王年安徽大学电子信息工程学院合肥230601 安徽大学训算智能与信号处理教育部重点实验室合肥230039

成对视频共同运动模式的协同分割指的是同时检测出两个相关视频中共有的行为模式,是计算机视觉研究的一个热点.本文提出了一种新的成对视频协同分割方法.首先,利用稠密轨迹方法对视频运动部分进行检测,并对运动轨迹进行特征表示;然后,... 详细信息

成对视频共同运动模式的协同分割指的是同时检测出两个相关视频中共有的行为模式,是计算机视觉研究的一个热点.本文提出了一种新的成对视频协同分割方法.首先,利用稠密轨迹方法对视频运动部分进行检测,并对运动轨迹进行特征表示;然后,引入子模优化方法对单视频内的运动轨迹进行聚类分析;接着采用基于重加权随机游走的图匹配方法对成对视频运动轨迹进行匹配,该方法对出格点、变形和噪声都具有很强的鲁棒性;同时根据图匹配结果实现运动轨迹的共显著性度量;最后,将所有轨迹分类成共同运动轨迹和异常运动轨迹的问题转化为基于图割的马尔科夫随机场的二值化标签问题.通过典型运动视频数据集的比较实验,其结果验证了本文方法的有效性.

关键词：稠密轨迹子模函数图匹配共显著性马尔科夫随机场

考虑自增强影响的Ⅲ型复合材料气瓶连续损伤模拟及渐进失效分析（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2019年第1期20卷 36-49页

作者： Bin-bin LIAO dong-liang wang Li-yong JIA Jin-yang ZHENG Chao-hua GU Institute of Process Equipment Zhejiang University First Aircraft Institute of Aviation Industry Corporation State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University

目的:成型后的金属内胆复合材料气瓶,即III型复合材料气瓶(以下简称气瓶),需采用自紧工艺来提高疲劳寿命。最佳自紧压力是自紧工艺的重要参数。本文旨在建立确定最佳自紧压力和气瓶渐进失效的有限元方法,研究自紧后气瓶纤维和基体损伤... 详细信息

目的:成型后的金属内胆复合材料气瓶,即III型复合材料气瓶(以下简称气瓶),需采用自紧工艺来提高疲劳寿命。最佳自紧压力是自紧工艺的重要参数。本文旨在建立确定最佳自紧压力和气瓶渐进失效的有限元方法,研究自紧后气瓶纤维和基体损伤演化规律,并探讨自紧后气瓶复合材料层和金属内衬层的应力变化。创新点:1.建立针对三维气瓶的Hashin失效准则和指数型损伤演化的渐进失效模型,并通过ABAQUSUMAT隐式有限元方法确定气瓶最佳自紧压力;2.通过渐进失效分析,揭示自紧后的气瓶纤维和基体损伤的损伤演化规律,并阐明自紧对气瓶渐进失效的影响。方法:1.基于连续损伤力学,建立三维Hashin失效准则和指数型损伤演化的渐进失效理论模型;2.通过ABAUQS-UMAT二次开发用户子程序实现渐进失效理论模型,并开展气瓶渐进失效计算;3.通过平板拉伸算例以及与气瓶试验数据对比,验证模型的准确性。结论:1.基体损伤首先出现在螺旋层,而纤维损伤首先出现在环向层。2.除了自紧后的泄压阶段和自紧后重新加压至压力值等于自紧压力的升压阶段,有无自紧的气瓶损伤演化规律基本一致;而在上述泄压和升压阶段,基体损伤保持不变,说明经过自紧后的气瓶在工作压力下存在基体损伤。3.当内压压力低于自紧压力时,自紧工艺才会影响气瓶应力分布;且随着压力的升高,基体损伤不变,内衬应力减少,纤维应力增加;此外,经过自紧的气瓶在工作压力下最大环向和轴向内衬应力减少且出现在筒体部分的两端。

关键词：复合材料气瓶损伤演化行为 Hashin失效准则有限元分析

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金刚石基燃料电池催化剂的研究进展

无机材料学报 2017年第7期32卷 673-680页

作者：董亮王艳辉臧建兵东北大学秦皇岛分校河北省电介质与电解质功能材料重点实验室秦皇岛066004 燕山大学亚稳材料制备技术与科学国家重点实验室秦皇岛066004

金刚石是由共价键方式连接的sp^3杂化碳原子组成,具有极强的稳定性。含硼金刚石(BDD)薄膜、BDD颗粒、非掺杂纳米金刚石(ND)等新型金刚石又兼具一定的导电性,因此成为高稳定性燃料电池催化剂的理想载体材料。研究者进一步发现通过对上述... 详细信息

金刚石是由共价键方式连接的sp^3杂化碳原子组成,具有极强的稳定性。含硼金刚石(BDD)薄膜、BDD颗粒、非掺杂纳米金刚石(ND)等新型金刚石又兼具一定的导电性,因此成为高稳定性燃料电池催化剂的理想载体材料。研究者进一步发现通过对上述新型金刚石进行适当功能化处理,可以进一步提高催化剂的催化活性和稳定性。对金刚石进行掺杂处理,既包括向金刚石晶格中掺杂,也包括向金刚石衍生的石墨结构中进行掺杂,能够得到新型高稳定性燃料电池非铂催化剂,且金刚石sp^3结构在提高非铂催化剂稳定性方面作用独特。本文总结介绍了相关研究成果,希望能为后续研究提供参考借鉴。

关键词：金刚石燃料电池稳定性综述