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Research on the Development Strategy of Rural Cooperative Economy in the Post‐Epidemic Era ‐‐ Take the Rural Areas in Northern Anhui Province as an Example

Frontiers in Economics and Management

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Frontiers in Economics and Management 2023年第2期4卷 50-54页

作者： xuwen Zhang Han Han Senao Li Jing yan

In recent years, the development of the rural cooperative economy, the government and how to develop. At present, the coordinated development of rural revitalization and urbanization cannot be separated from the revitalization of the rural economy, which means that how to develop the rural cooperative economy has become an important issue of the current rural revitalization. This project is based on discussing how to develop the rural cooperative economy in northern Anhui. Through literature collection, field investigation and research, data analysis and sorting, combined with the advantages of rural areas in northern Anhui, it analyzes the current bottleneck of development and the factors restricting the development of rural cooperative economy in northern Anhui. Based on the basic situation of the rural cooperative economic development, the country and the Anhui province introduced support of rural cooperative economic development policy with the north of rural cooperative economic development actual situation, on the basis of a series of north of rural cooperative economy development quality countermeasures and Suggestions, innovative to develop two village mutual learning evaluation mechanism, promote land adoption agriculture, construction live help farmers base countermeasures, such as policy support, resources as a whole, innovation consciousness gives the specific path of rural cooperative economic development.

关键词： Rural Revitalization Cooperative Economy Urbanization Development Farmers' Income Increase Production Union

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Asymmetry of inferior turbinate in patients with nasal septum deviation and its significance for nasal ventilation surgery

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EUROPEAN ARCHIVES OF OTO-RHINO-LARYNGOLOGY 2021年第5期279卷 2423-2431页

作者： Liu, Jinfeng Qian, Zhuoming yan, Zhanfeng yang, xuwen Wang, Ningyu Capital Med Univ Beijing Chaoyang Hosp Dept Otorhinolaryngol Head & Neck Surg 8 Gongti South Rd Beijing 100020 Peoples R China Univ Chinese Acad Sci Beijing Huairou Dept Otorhinolaryngol Beijing 101400 Peoples R China Beijing Univ Chinese Med Dongzhimen Hosp Dept Otorhinolaryngol Beijing 100700 Peoples R China Capital Med Univ Clin Med Sch 3 7 Med Students Long Schooling Class 3 Beijing 100020 Peoples R China

Purpose To investigate the asymmetry of the inferior turbinate (IT) in patients with nasal septum deviation (NSD). Methods The paranasal sinus computed tomography (CT) of 100 patients with NSD were retrospectively investigated from February 2018 to December 2019. The thickness of IT, IT mucosa and IT bone, the distance between the IT and the midline were measured on both the concave and convex sides, and which correlation with NSD was analyzed. Results The widths of the IT, IT bone and IT medial mucosa on the concave side were larger than those on the convex side (all P < 0.05). The distance from the IT and IT bone to the midline on the concave side was smaller than those on the convex side (P < 0.05, respectively). The degree of NSD had a negative correlation with the widths of the IT and IT bone on the convex side, and the distance between the IT and the midline on the concave side;and a positive correlation with the distance from IT and IT bone to the midline on the convex side, and IT mucosa thickness on the concave side (all P < 0.05). Conclusion The asymmetric IT width is mainly caused by both hypertrophies of the IT mucosa on the concave side and atrophy of the IT bone on the convex side. Therefore, during the surgery of nasal ventilation reconstruction, the IT on the convex side are suggested to be protected from intervention. In contrast, it is necessary to lateralize the IT bone and reduce the IT submucosal tissue on the concave side. However, routine excision of the IT bone is not recommended.

关键词： Nasal septum deviation Inferior turbinate Nasal obstruction Septoplasty Inferior turbinate hypertrophy

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Study on three-point bending behavior of sandwich beams with novel auxetic honeycomb core

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MATERIALS TODAY COMMUNICATIONS 2023年 35卷

作者： Li, Lizheng He, Qiang Jing, xuwen Jiang, Yonggang yan, Dejun Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212000 Peoples R China Cssc Huangpu Wenchong Shipbuilding Co Ltd Guangdong Prov Key Lab Adv Welding Technol Ships Guangzhou 510715 Peoples R China

To further enhance the impact resistance of honeycomb sandwich beams, an auxetic honeycomb core is proposed by introducing rhombic structure into the concave hexagonal honeycomb, thus obtaining a new auxetic honeycomb core sandwich beam (NDH). The bending resistance of NDH is investigated through numerical simulations. The analysis confirms that the NDH has better bending resistance and energy-absorbing properties than the internally concave hexagonal honeycomb sandwich beam (REH). Furthermore, the stable plastic deformation and high energy absorption is closely related to the bearing position and structural parameters. When the punch is directly above the new honeycomb cell (T-position), NDH shows better bearing capacity. In addition, increasing the panel thickness is conducive to enhancing the bending resistance of sandwich beam. The panel thickness arrangement with t(f)/t(b) > 1 has better bending resistance than other arrangements under the same total front and rear panel thickness. The composite proportional assessment method (COPRAS) is further used to set affect weights of structure parameters on its bending resistance. It is proved that the bending resistance of NDH may be rapidly enhanced by thickening new honeycomb cells. This research provides some perspectives and methods for the future research on the impact resistance for sandwich panels with novel honeycomb core.

关键词： Sandwich beam New auxetic honeycomb core Three-point bending Complex proportional assessment method

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Impact resistance analysis and multi-objective optimization of polyurea-coated auxetic honeycomb sandwich panels

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MATERIALS TODAY COMMUNICATIONS 2023年 35卷

作者： He, Qiang Li, Lizheng Jing, xuwen Jiang, Yonggang yan, Dejun Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212000 Peoples R China Cssc Huangpu Wenchong Shipbuilding Co Ltd Guangzhou 510715 Peoples R China

To investigate the protective capacity and mechanism of polyurea-coated auxetic honeycomb sandwich structures under impact loading. The mechanical properties of a sandwich panel under the action of a cylindrical punch is numerically simulated by LS-DYNA. Firstly, the impact of different coating positions on the protective properties of sandwich panels is analyzed and concluded which coating method is most effective. Then, the mechanism of the impact resistance of sandwich panels strengthened by the thickness, grading and orientation of the auxetic honeycomb cores is discussed by outline volume analysis. Finally, a multi-objective optimization of the sandwich panel's internal concave hexagonal structural parameters with the best impact resistance is carried out. It is shown that the coating of polyurea elastomers can effectively increase the impact protection performance of sandwich panels. The best impact resistance is achieved by the back side coated sandwich panel (type B). Increasing the wall thickness of auxetic honeycomb and the thickness of the upper graded honeycomb core can effectively increase the impact resistance of the type B sandwich panel. Optimized type B sandwich panel has a 6.2% reduction in maximum deflection (D) compared to the unoptimized version. The findings of this research provide a reference for the study and design of polyurea-coated sandwich panels.

关键词： Polyurea elastomer Auxetic honeycomb Impact resistance Numerical simulation

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Electrochemiluminescence ultrasensitive immunoassay for carbohydrate antigen 125 based on AgInS₂/ZnS nanocrystals

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ANALYTICAL AND BIOANALYTICAL CHEMISTRY 2021年第8期413卷 2207-2215页

作者： Yin, Min Wang, yan Gao, xuwen Du, Shichao Cheng, yan Yu, Shuai Zou, Guizheng Xue, Fumin Qilu Univ Technol Shandong Acad Sci Shandong Anal & Testing Ctr Sch Pharmaceut SciKey Lab Appl Technol Sophistic Jinan 250014 Shandong Peoples R China Shandong Univ Sch Chem & Chem Engn Jinan 250100 Shandong Peoples R China

We developed a near-infrared (NIR) electrochemiluminescence (ECL) immunosensor for sensitively and selectively determining carbohydrate antigen 125 (CA125) with toxic-element-free and environmental-friendly AgInS2/ZnS nanocrystals (NCs) as tags. The core/shell-structured AgInS2/ZnS NCs not only can be conveniently prepared via an aqueous synthetic procedure, but also has high photoluminescence quantum yield (PLQY) of up to 61.7%, highly monodispersed, water-soluble, and desired biological compatibility. As AgInS2/ZnS NCs can be oxidized via electrochemically injecting holes into their valence band at + 0.84 V, both the monodispersed AgInS2/ZnS NCs in solution and the surface-confined AgInS2/ZnS NCs immobilized in sandwich-typed immuno-complexes with CA125 as analyte can exhibit efficient oxidative-reduction ECL around 695 nm under physiological conditions with the presence of tri-n-propylamine (TPrA). The ECL intensity from the AgInS2/ZnS NCs immobilized in sandwich-typed immuno-complexes increases linearly and selectively with an increased concentration of CA125 from 5 x 10(-6) to 5 x 10(-3) U/mL, and limit of detection (LOD) was 1 x 10(-6) U/mL (S/N = 3). This reliable platform can provide an effective detection method in the early diagnosis and treatment of ovarian cancer.

关键词： Electrochemiluminescence (ECL) Immunosensor AgInS2/ZnS NCs Carbohydrate antigen 125 (CA125)

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管理层薪酬与公司并购重组决策——来自中国A股上市公司的证据

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中南财经政法大学研究生学报 2018年第3期 23-31页

作者：闫续文中南财经政法大学金融学院

本文选取了2008-2014年中国A股上市公司管理层薪酬以及并购重组数据,从上市公司管理层行为角度出发,基于管理层薪酬对上市公司并购重组行为进行解释,通过构建回归模型,发现上市公司管理层薪酬和上市公司发生并购重组的可能性、并购重组... 详细信息

本文选取了2008-2014年中国A股上市公司管理层薪酬以及并购重组数据,从上市公司管理层行为角度出发,基于管理层薪酬对上市公司并购重组行为进行解释,通过构建回归模型,发现上市公司管理层薪酬和上市公司发生并购重组的可能性、并购重组的次数以及并购重组的绩效之间都存在着显著的正向关系。根据已有文献的研究,并购重组行为会对管理层薪酬产生显著的促进作用,为了解决固有的内生性问题,本文引入了＂八项规定＂作为外生的政策冲击,采用DID的方法,发现以上结果依旧显著。因此,进一步完善公司治理结构,健全对管理层的制约与激励机制才是保证公司长期稳定发展的关键。

关键词：薪酬激励并购重组并购重组绩效限薪

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Selective Frustrated/Nonfrustrated Anion-Migrated Ring-Opening Polymerization of 1-Cyclopropylvinylbenzene

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MACROMOLECULES 2022年第12期55卷 5140-5148页

作者： Bai, Hongyuan Wang, Yinran Han, Li Wang, Xuefei yan, Hong Li, xuwen Chen, Siwei Leng, Haitao Yao, Zijing Ma, Hongwei Dalian Univ Technol Sch Chem Engn Dept Polymer Sci & Engn Dalian 116024 Peoples R China

Exploring novel polymerization mechanisms for the preparation of switchable isomers in chains from homopolymerization with only monomers is undoubtedly an exhilarating and challenging pursuit in polymer chemistry. Therefore, this work presents a novel strategy for realizing reversible cycle anion migrated ring-opening polymerization (AMROP) and general anionic polymerization (thermodynamics limits the further ring-opening reaction of the 1-cyclopropylvinylbenzene (CPVB) unit, and this process is defined as frustrated AMROP). By employing alkali metal alkoxides (potassium tert-butoxide (t-BuOK) and sodium 2,3-dimethylpentan-3-olate (NaODP)) as additives, the opening of the cyclopropyl group in CPVB can be controlled during homopolymerization. Additionally, the structure and sequence distribution of inserted CPVB units are determined by distinct selective polymerization mechanisms. Thus, the synthetic polymer includes two structural units, i.e., ring-opened CPVB (ro), which is generated from AMROP, and nonopened CPVB (ga), which results from frustrated AMROP (F-AMROP). Furthermore, in view of steric hindrance from the penultimate-unit effect during chain growth of CPVB, the process of F-AMROP cannot continuously occur and requires the AMRO process of CPVB to decrease the steric hindrance around active centers. Therefor;under the influence of steric hindrance from the penultimate unit, AMRO, and thermodynamics, a reversible cycle of frustrated and nonfrustrated AMROP can be activated during the polymerization process, which further realizes a single monomer to prepare an alternating polymer with different isomers. Ultimately, the mechanisms for AMROP and F-AMROP are explored deeply with density functional theory calculations. This intriguing mechanistic finding will become a pioneering and innovative strategy for development of polymerization mechanisms and unprecedented polymer structures in polymer synthesis.

关键词： Additives Chemical structure Molecular structure Polymerization Polymers

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Fabrication of HKUST-1 Based Ink for Direct Writing of Precursors of Primary Explosives 2nd

Fabrication of HKUST-1 Based Ink for Direct Writing of Precu...

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2nd International Conference on Development and Application of Carbon Nanomaterials in Energetic Materials, ICCN 2021

作者： yang, Caimin Hu, yan Zeng, Huipeng Liu, xuwen Ye, Yinghua Shen, Ruiqi School of Chemistry and Chemical Engineering Nanjing University of Science and Technology Nanjing210094 China Micro-Nano Energetic Devices Key Laboratory Ministry of Industry and Information Technology Nanjing210094 China

ISBN: (纸本)9789811917738

As a direct-write molding technology based on the principle of layer-by-layer accumulation, inkjet printing has shown application prospects in the field of micro-sized energetic materials. Based on HKUST-1, the influence of three binders of polyvinyl alcohol, ethylcellulose, and polyvinylidene fluoride on the printing characteristics of precursor inks was explored. The binder system suitable for ink preparation was screened out, and the best printing parameters were determined. The matching rule between the printing line width and the needle aperture was studied. Moreover, the best ink formula and needle size which can achieve the target line width were selected. The optimized ink was pyrolyzed at a high temperature under an inert atmosphere to prepare a composite of nano-copper coated by porous carbon and copper azide-porous carbon composite energetic materials was in-situ prepared through a gas–solid azidation reaction. This work laid the foundation for the subsequent realization of micro-scale precision charges based on carbon-based copper azide energetic materials. © 2022, China Ordnance Society.

关键词： Ink jet printing

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Quantifying the roles of thermal volatilization and decomposition in microwave remediation of polycyclic aromatic hydrocarbon-polluted soil and modeling remediation effectiveness

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JOURNAL OF HAZARDOUS MATERIALS 2024年 463卷 132884页

作者： Deng, Jibao Wang, Hefei Su, yan Shen, Ke Chen, xuwen Zhou, Xian Hu, Xiaojie Gao, yanzheng Nanjing Agr Univ Inst Organ Contaminant Control & Soil Remediat Coll Resources & Environm Sci Nanjing 210095 Peoples R China Shenyang Acad Environm Sci Shenyang 110167 Peoples R China Weigang Rd Nanjing 210095 Peoples R China

Microwave irradiation is a promising technology for the remediation of soil contaminated by organic contaminants. However, the roles of volatilization and decomposition in microwave removal of polycyclic aromatic hydrocarbons (PAHs) in soil have not yet been quantitatively determined. A model describing the removal efficiency of benz(a)anthracene (BaA) at different treatment times and varied conditions was constructed, wherein BaA removal efficiency was positively and linearly correlated with soil temperature. BaA removal in soil was attributed to thermal volatilization (97.8%) and decomposition (2.2%). Radicals such as center dot OH and center dot O (-)(2) were found to initiate BaA decomposition, the pathway of which was elucidated through HPLC-MS analysis, revealing benz(a)anthracene-7,12-dione as the main intermediate product. The new ideas and perspectives founded in this study offer theoretical support for microwave remediation of organic compound-contaminated sites.

关键词： PAHs Microwave irradiation Soil remediation Decomposition pathways

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Altered levels of circulating CD8⁺CXCR5⁺PD-1⁺T follicular cytotoxic cells in primary Sjogren's syndrome

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CLINICAL RHEUMATOLOGY 2022年第6期41卷 1697-1708页

作者： Zhai, xuwen Wang, yanlin Guo, Hui Liang, Zhaojun Feng, Min Wu, yanyao Qin, yan Zhao, Xiangcong Gao, Chong Luo, Jing Shanxi Med Univ Simulat Hosp Clin Skills Teaching Jinzhong 030600 Shanxi Peoples R China Shanxi Med Univ Dept Med Div Rheumatol Hosp 2 Taiyuan 030001 Shanxi Peoples R China Shanxi Med Univ Dept Med Div Nephrol Hosp 2 Taiyuan 030001 Shanxi Peoples R China Shenzhen Baoan Shiyan Peoples Hosp Dept Med Div Nephrol Shenzhen 518005 Guangdong Peoples R China Harvard Med Sch Brigham & Womens Hosp Dept Pathol Boston MA 02115 USA

Background Circulating CD8(+)T-cells expressing the C-X-C chemokine receptor type 5 (CXCR5) (CD8(+)CXCR5(+)T), a recently identified follicular cytotoxic T cell subset, are involved in antiviral immunity and autoimmunity, but their abundance and role in the pathogenesis of primary Sjogren syndrome (pSS) are unknown. Methods Circulating CD8(+)CXCR5(+)T cell and CD8(+) regulatory T cells (CD8(+)Treg) were evaluated in 49 pSS patients (19 patients with pulmonary involvement) and 24 age- and sex-matched healthy controls (HCs) by flow cytometry. Orthogonal partial least squares discriminant analysis (OPLS-DA) was performed, and receiver operating characteristic curves (ROC) were generated to identify characteristic cell subsets. Spearman's correlation analysis was conducted to examine the relationships between CD8(+)T cell subsets and clinical features. Results The proportions and numbers of CD8(+)CXCR5(+) , CD8(+)CXCR5(+) programmed death 1-positive (PD-1(+)), and CD8(+)CXCR5 PD-1(+)T cells were significantly higher, whereas those of CD8 +/- Treg were markedly lower, in pSS patients than HCs. The CD8(+)CXCR5(+)PD-1(+)T cell to CD8(+)Treg ratio had the greatest discriminatory power for pSS and HCs according to OPLS-DA and ROC analyses. The increased numbers of CD8(+)CXCR5(+)T cells and CD8(+)CXCR5(+)PD-1(+)T cells were strongly associated with those of CD4(+)CXCR5(+)T and B cells. The proportions and numbers of CD8(+)CXCR5(+)PD-1(+)T cells were increased in pSS patients with lung involvement. Conclusions We identified a new CD8(+)CXCR5(+)PD-1(+)T subset, which was increased in abundance in pSS patients, particularly those with lung involvement, compared with HCs. Also, the CD8(+)CXCR5(+)PD-1(+)T to CD8(+)Treg ratio may be useful for identifying pSS. Our findings suggest that targeting follicular CD8(+)T cell subsets has therapeutic potential for pSS.

关键词： CD8(+)CXCR5(+) follicular cytotoxic T subsets CD8(+) regulatory T cells Lung involvement OPLS-DA Primary Sjogren's syndrome

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