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Chinese Medical Sciences Journal 2024年第2期39卷 149-154页

作者： Ying-Xue Cui chuan-Jin song Xue-Si Hou Gui-Lin Liu Xu Ji Shao-song Wang Department of Neurology Beijing Hospital of Traditional Chinese MedicineCapital Medical UniversityBeijing 100010China

Vertebral artery dissection is a rare pathology that can cause ischemic stroke in young *** massage,especially improper pulling manipulation,is a cause of vertebral artery *** present a case of 32-year old woman who developed acute multiple posterior circulation ischemic cerebral infarctions as a result of left vertebral artery V4 segment dissection after receiving neck *** underwent emergency vertebral artery stent implantation at the site of the *** were relieved the day after *** patient recovered without adverse complications or endovascular restenosis in the following year.

关键词： vertebral artery dissection acute ischemic stroke stent implantation endovascular therapy

Development of a Multiplex Real-Time Quantitative PCR Assay for Detecting Vaginal Microbiota in Chinese Women-China,2021-2022

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China CDC weekly 2024年第31期6卷 793-798,I0001,I0002页

作者： Xiaolei Wang Yuanyuan Zhang Tingting Liu chuan song Xiaoyu Xue Jun Liu Hongxin Zhao Clinical Center for HIV/AIDS Beijing Ditan HospitalCapital Medical UniversityBeijingChina Beijing Institute of Infectious Diseases BeijingChina Beijing Key Laboratory of Emerging Infectious Diseases Institute of Infectious DiseasesBeijing Ditan HospitalCapital Medical UniversityBeijingChina National Center for Infectious Diseases Beijing Ditan HospitalCapital Medical UniversityBeijingChina Beijing Ditan Hospital Peking UniversityBeijingChina Department of Gynecology Beijing Ditan HospitalCapital Medical UniversityBeijingChina

Introduction:The Nugent score,limited by subjectivity and personnel requirements,lacks *** a precise and simple molecular test is therefore essential for detecting vaginal microbiota compositions and evaluating vaginal ***:We evaluated the vaginal health of Chinese women using quantitative polymerase chain reaction(qPCR)to target Lactobacillus crispatus(***),***,Gardnerella vaginalis(***),Atopobium vaginae(***),and Megasphaera *** vaginosis(BV)-related bacteria shared a fluorescent *** 16S rDNA sequencing as a reference standard,we evaluated and validated the diagnostic accuracy of the qPCR ***:Both qPCR and 16S rDNA sequencing demonstrated 90.5%concordance in segregating vaginal community state type(CST),as visualized through heatmaps and ***’s correlation analysis revealed strong correlations between the two methods in calculating the RA of ***(CST I),***(CST III),and BV-related bacteria(CST IV),with coefficients of 0.865,0.837,and 0.827,*** operating characteristic analysis showed that qPCR had significant diagnostic accuracy for CST I,CST III,and CST IV(molecular BV),with area under the curve values of 0.967,0.815,and 0.950,respectively,indicating strong predictive ***:Vaginal health can be evaluated using a single qPCR amplification experiment,making the multiplex qPCR assay a highly accurate tool for this purpose.

关键词： Vaginal Assay precise

3D modeling for effect of tool eccentricity on coupled thermal and material flow characteristics during friction stir welding

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Transactions of Nonferrous Metals Society of China 2024年第10期34卷 3309-3325页

作者： Hao SU Ji CHEN chuan-song WU Key Laboratory for Liquid−Solid Structural Evolution&Processing of Materials Ministry of EducationInstitute for Materials JoiningShandong UniversityJinan 250061China

A novel three-dimensional numerical model is proposed to investigate the effect of tool eccentricity on the coupled thermal and material flow characteristics in friction stir welding(FSW) *** asymmetrical boundary condition at the tool-workpiece interface,and the dynamic mesh technique are both employed for the consideration of the tool eccentricity during tool *** is found that tool eccentricity induces the periodical variation of the heat densities both at the tool-workpiece interface and inside the shear layer,but the fluctuation amplitudes of the heat density variations are ***,it is demonstrated that tool eccentricity results in significant variation of the material flow behavior in one tool rotating ***,the material velocity variation at the retreating side is particularly important for the formation of the periodic characteristics in *** modeling result is found to be in good agreement with the experimental one.

关键词： friction stir welding tool eccentricity thermal behavior periodic material flow numerical simulation

Post-synthetic modifications of MOFs by different bolt ligands for controllable release of cargoes

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Chinese Chemical Letters 2024年第10期35卷 404-407页

作者： Hao Wang Meng-Qi Pan Ya-Fei Wang Chao Chen Jian Xu Yuan-Yuan Gao chuan-song Qi Wei Li Xian-He Bu College of New Materials and Chemical Engineering Beijing Key Lab of Special Elastomeric Composite MaterialsBeijing Institute of Petrochemical TechnologyBeijing 102617China School of Materials Science and Engineering National Institute for Advanced MaterialsTKL of Metal and Molecule-Based Material ChemistryNankai UniversityTianjin300350China College of Chemical Engineering Inner Mongolia University of TechnologyHohhot 010051China

Post-synthetic modifications(PSM)have drawn great attention as a vigoroso tool to tune or enhance the performance of metal-organic frameworks(MOFs).However,the current PSM method usually have to sacrifice the porosity of MOFs to enrich their functionality,such as pore space partition(PSP)and postsynthetic elimination and insertion(PSE&I),causing a trade-off in this *** address this issue,we herein propose a new PSM strategy of using the size-matching ligands as the bolts to lock MOFs'pores,which could be anchored onto open metal sites(OMSs)after guest loading through a stepwise *** a result,the loaded cargoes undergo a controlled releasing process with respect to different bolt *** proposed strategy provides a promising way to balance the functionality and porosity of MOFs.

关键词： Post-synthetic modifications Metal-organic frameworks Bolting ligand Control release Cargo

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河北省乡村振兴水平评价及空间差异研究

中国农业资源与区划 2024年第3期45卷 187-195页

作者：宋川张宁河北开放大学河北农业大学

[目的]对2010—2020年河北省及其各区域乡村振兴水平进行测度，并针对区域差异展开解析，以期为该区域农业绿色发展提供科学参考。[方法]文章构建河北省乡村振兴评价指标体系，然后基于2010—2020年的面板数据，综合运用熵权法、均权法... 详细信息

[目的]对2010—2020年河北省及其各区域乡村振兴水平进行测度，并针对区域差异展开解析，以期为该区域农业绿色发展提供科学参考。[方法]文章构建河北省乡村振兴评价指标体系，然后基于2010—2020年的面板数据，综合运用熵权法、均权法、加权综合评价指数法对河北省及其区域乡村振兴水平进行测度，同时选取变异系数和锡尔指数对区域差异进行测度和分解。[结果]（1）河北省乡村振兴发展水平及产业兴旺、生态宜居、乡风文明、治理有效、生活富裕5个子系统均呈现稳步逐年上升趋势，其中，乡风文明、治理有效两子系统水平偏低，产业兴旺和生态宜居水平相对较高，变化趋势以生态宜居增长最快，生活富裕增长缓慢，产业兴旺波动性较大。（2）河北省各区域乡村振兴水平和变化趋势差异较大。邯郸和唐山发展水平最高，沧州和承德相对较低，邯郸、保定、石家庄、张家口和承德5市水平提升较快，衡水变化最小，其他地区提升速度相对缓慢。（3）冀东、冀南地区的乡村振兴水平区域差异性较小，冀中、冀北区域差异相对较大，冀北和四大区域间差异是造成全省差异性的主要原因。[结论]河北省乡村振兴发展水平整体呈现逐年递增趋势，但增幅有限；地区发展不平衡，地区发展水平差距大，中心城市规模小，乡村之间、地区之间要素流动的成本高，难以对乡村造成有效辐射，农业产业基础薄弱，公共服务设施不足等诸多乡村振兴的短板依然存在。未来应继续加强推进缩小区域间差异，尤其是冀北和冀中地区内部乡村振兴发展不平衡问题较严重。

关键词：乡村振兴指标体系水平测度区域差异

来源：博看期刊

超声振动对2195铝锂合金搅拌摩擦焊接头显微组织与力学性能的影响

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Transactions of Nonferrous Metals Society of China 2024年第1期34卷 80-93页

作者：戴翔石磊田春燕武传松高嵩山东大学材料液固结构演变与加工教育部重点实验室济南250061 齐鲁工业大学(山东省科学院)机械工程学院济南250353

采用新型超声振动强化搅拌摩擦焊对第三代2195-T6铝锂合金进行焊接,研究超声振动对接头显微组织与力学性能的影响。研究表明,超声振动强化搅拌摩擦焊能够增强塑性材料流动,进而抑制焊接缺陷,提高无缺陷接头的临界焊接速度。在保证接头... 详细信息

采用新型超声振动强化搅拌摩擦焊对第三代2195-T6铝锂合金进行焊接,研究超声振动对接头显微组织与力学性能的影响。研究表明,超声振动强化搅拌摩擦焊能够增强塑性材料流动,进而抑制焊接缺陷,提高无缺陷接头的临界焊接速度。在保证接头抗拉强度达到母材75%的条件下,超声振动强化搅拌摩擦焊的焊接速度和效率均高于常规搅拌摩擦焊。施加超声振动能够大幅提升较高焊接速度条件下的接头力学性能。超声振动强化搅拌摩擦焊接头的极限抗拉强度为449.5 MPa,达到母材的83.1%。超声振动强化搅拌摩擦焊接能够在保证接头质量的前提下提升临界焊接速度和焊接效率。

关键词： 2195-T6铝锂合金搅拌摩擦焊超声振动强化搅拌摩擦焊焊接速度晶粒结构接头性能

广义分数阶算子下非标准Lagrange系统的Noether定理

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应用数学学报 2024年第4期47卷 531-548页

作者：沈世磊宋传静苏州科技大学数学科学学院苏州215009

自然界中几乎不存在简单的线性动力学系统,大多数都是以非保守非线性动力学系统的形式存在,而非标准Lagrange函数可以用于非保守非线性问题的动力学建模.同时,分数阶模型也是研究复杂动力学及物理行为的较好选择.因此本文研究了广义分... 详细信息

自然界中几乎不存在简单的线性动力学系统,大多数都是以非保守非线性动力学系统的形式存在,而非标准Lagrange函数可以用于非保守非线性问题的动力学建模.同时,分数阶模型也是研究复杂动力学及物理行为的较好选择.因此本文研究了广义分数阶算子下非标准Lagrange系统的Noether对称性与守恒量.首先,建立广义分数阶算子下非标准Lagrange系统的Lagrange方程,然后基于Hamilton作用量在无限小变换下的不变性,建立广义分数阶算子下非标准Lagrange系统的Noether定理,并给出该系统的对称性及相应的守恒量.在特定条件下广义分数阶算子下非标准Lagrange系统的Noether守恒量可以退化为整数阶非标准Lagrange系统的Noether守恒量,最后举例说明所得结果的具体应用.

关键词：广义分数阶算子非标准Lagrange系统 Noether定理对称性与守恒量

Tumour response following preoperative chemotherapy is affected by body mass index in patients with colorectal liver metastases

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World Journal of Gastrointestinal Oncology 2024年第2期16卷 331-342页

作者： Hua-chuan song Hang-Cheng Zhou Ping Gu Bing Bao Quan Sun Tian-Ming Mei Wei Cui Kang Yao Huan-Zhang Yao Shen-Yu Zhang Yong-Shuai Wang Rui-Peng song Ji-Zhou Wang Department of General Surgery Provincial Hospital Affiliated to Anhui Medical UniversityHefei 230001Anhui ProvinceChina Department of Hepatobiliary Surgery The First Affiliated Hospital of University of Science and Technology of ChinaDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001Anhui ProvinceChina Department of Pathology The First Affiliated Hospital of University of Science and Technology of ChinaDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001Anhui ProvinceChina Department of Gastrointestinal Surgery Tongcheng People’s HospitalTongcheng 231400Anhui ProvinceChina Department of Gastrointestinal Surgery Suzhou Hospital Affiliated to Anhui Medical UniversitySuzhou 234000Anhui ProvinceChina Department of General Surgery Xuancheng People’s HospitalXuancheng 242000Anhui ProvinceChina

BACKGROUND Colorectal cancer is the third most prevalent malignancy globally and ranks second in cancer-related mortality,with the liver being the primary organ of *** chemotherapy is widely recommended for initially or potentially resectable colorectal liver metastases(CRLMs).Tumour pathological response serves as the most important and intuitive indicator for assessing the efficacy of ***,the postoperative pathological results reveal that a considerable number of patients exhibit a poor response to preoperative *** mass index(BMI)is one of the factors affecting the tumori-genesis and progression of colorectal cancer as well as prognosis after various antitumour *** studies have indicated that overweight and obese patients with metastatic colorectal cancer experience worse prognoses than those with normal weight,particularly when receiving first-line chemotherapy regimens in combination with *** To explore the predictive value of BMI regarding the pathologic response following preoperative chemotherapy for *** A retrospective analysis was performed in 126 consecutive patients with CRLM who underwent hepatectomy following preoperative chemotherapy at four different hospitals from October 2019 to July *** and multivariate logistic regression models were applied to analyse potential predictors of tumour pathological *** Kaplan-Meier method with log rank test was used to compare progression-free survival(PFS)between patients with high and low ***<24.0 kg/m^(2) was defined as low BMI,and tumour regression grade 1-2 was defined as complete tumour *** Low BMI was observed in 74(58.7%)patients and complete tumour response was found in 27(21.4%)*** rate of complete tumour response was significantly higher in patients with low BMI(29.7%vs 9.6%,P=0.007).Multivariate analysis revealed that low BMI[odds ratio(OR)=4.56,95%confidence interval(CI):1

关键词： Colorectal liver metastases Body mass index Tumour regression grade Preoperative chemotherapy Hepatectomy

Numerical simulation for the comparison of thermal and plastic material flow behavior between symmetrical and asymmetrical boundary conditions during friction stir welding

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Advances in Manufacturing 2023年第1期11卷 143-157页

作者： Hao Su chuan-song Wu MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing Institute of Materials JoiningShandong UniversityJinan250061People’s Republic of China

An accurate description of the contact condition between the tool and the workpiece material is one of the most important issues for expounding the underlying multi-physics coupled mechanism during friction stir welding(FSW)*** the present study,a novel asymmetrical boundary condition around the tool-workpiece contact interface is proposed for the FSW of AA2024-T4 alloy.A three-dimensional computational fluid dynamics model is employed for the comparison of the coupled thermal and plastic material flow behavior between asymmetrical and symmetrical boundary *** results of heat generation,temperature distribution,tunnel defect formation and material flow streamline during the welding process are quantitatively ***,various experimental measuring methods are utilized to obtain information about temperature,thermal cycle,tool torque and horizontal cross-section around the exiting *** is revealed that the modeling results of heat flux density and temperature distribution around the pin,as well as material flow characteristics all change significantly for the two models with different boundary ***,the asymmetrical boundary condition is more capable of predicting temperature fluctuation,plastic material flow along the vertical direction,as well as tunnel defect formation during ***,the superiority of the model with asymmetrical boundary condition over the symmetrical one during the numerical simulation of FSW is elucidated.

关键词： Friction stir welding(FSW) Numerical simulation Heat generation Plastic material flow Asymmetrical boundary condition

Numerical simulation of humping phenomenon in high speed gas metal arc welding

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Frontiers of Materials Science 2011年第2期5卷 90-97页

作者： Ji CHEN chuan-song WU State Key Lab of Advanced Welding Production Technology Harbin Institute of Technology Harbin 150001 China Institute of Materials Joining Shandong University Jinan 250061 China

It is of great significance to obtain a thorough understanding of the physical mechanisms responsible for humping bead phenomenon in high speed gas metal arc welding （GMAW） in order to raise welding efficiency. Experiments were conducted to observe the weld pool behaviors in high speed GMAW, and it was found that both the severely deformed weld pool surface and strong backward flowing play a dominant role in humping bead formation. In this study, a mathematical model is developed to quantitatively analyze the forming mechanism of humping beads for high speed GMAW through considering both the momentum and heat content distribution of the backward flowing molten metal inside the weld pool. The transient development of temperature profiles in the weld pool with severe deformation demonstrates the humping bead forming process under some welding conditions. The predicted and measured humping bead dimensions are in agreement.

关键词： numerical simulation humping weld bead high-speed GMAW