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Asian Agricultural Research 2024年第4期16卷 3-7页

作者： Haosong LI rao chen College of Economics and Management Beijing University of AgricultureBeijing Research Center of Rural RevitalizationBeijing 102206China

In the economic development of Beijing,although the share of the total amount of agricultural industry in the overall economy is relatively low,it has an important impact on the daily life of residents,social stability and the development of other industries.Changping District,as an important agricultural production base of Beijing,its agricultural development has an indispensable strategic significance for the stability and growth of the entire regional economy.Therefore,it is very important to study the structure of agricultural industry in Changping District.Based on the detailed analysis of the agricultural industrial structure of Changping District,this paper uses the grey relation theory to analyze the different industries in the agricultural industrial structure of Changping District,including planting,forestry,animal husbandry,fishery and agricultural,forestry,service industries,in order to reveal the impact of these industries on the agricultural industrial structure of Changping District.Through this study,it comes up with specific and feasible suggestions for the optimization of agricultural industrial structure in Changping District,and provides valuable reference for the agricultural development of other areas in Beijing.

关键词： Grey relation theory Changping District Agricultural industrial structure

Analysis of Influencing Factors on Fruit Consumption of Urban and Rural Residents in Beijing

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Asian Agricultural Research 2024年第6期16卷 1-4,10页

作者： Zihao WANG rao chen Weimin YANG College of Economics and Management Beijing University of AgricultureBeijing 102206China Beijing Research Center of Rural Revitalization Beijing 102206China Department of Basic Education Beijing University of AgricultureBeijing 102206China

In light of the rapid expansion of China s economy,there has been a notable shift in the consumption patterns of urban and rural residents.This is evident in the increased consumption of agricultural products,with fruit consumption representing a particularly pronounced trend.The 2023 Beijing Consumption Statistics indicate that demand for fruit is increasing,accompanied by heightened competition for quality and brands.The paper is based on research that examines the current situation of fruit consumption among urban and rural residents in Beijing.The results indicate that when urban and rural residents in Beijing purchase fruits,price is the most significant factor influencing fruit consumption.Taste,appearance,and variety are also considered to be important influencing factors,while the influence of factors such as fruit type,consumption pattern,and fruit brand is relatively minor.

关键词： Urban and rural residents of Beijing Fruit consumption Influencing factor Consumption behavior

振动搅拌技术在水泥稳定碎石基层施工中的应用

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佛山陶瓷 2024年第1期34卷 33-35页

作者：陈骁山东普润公路工程有限公司潍坊262500

为研究振动搅拌技术对水泥稳定碎石性能的影响,本文分析了振动搅拌的作用机理,从混合料拌制、混合料运输、基层摊铺、基层碾压、接缝处理、养生作业等多个环节,分析了水泥稳定碎石基层施工中振动搅拌技术要点,梳理工艺流程,提出关键工... 详细信息

为研究振动搅拌技术对水泥稳定碎石性能的影响,本文分析了振动搅拌的作用机理,从混合料拌制、混合料运输、基层摊铺、基层碾压、接缝处理、养生作业等多个环节,分析了水泥稳定碎石基层施工中振动搅拌技术要点,梳理工艺流程,提出关键工序的技术要点。旨在依托振动搅拌技术构建更加高效、合理的水泥稳定碎石基层施工体系,为现场作业提供明确的技术指导,也为公路工程提供技术助力。

关键词：水泥稳定碎石基层振动搅拌施工技术

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微反应器内甲苯连续二硝化制备二硝基甲苯

化工学报 2024年第3期75卷 867-876页

作者：陈饶赵鑫陈戴欣姜圣坤廉应江王金波杨梅陈光文中国科学院大连化学物理研究所辽宁大连116023 中国科学院大学北京100049 中国五洲工程设计集团有限公司北京100053

为实现二硝基甲苯(DNT)的安全高效生产,采用微反应技术,以甲苯为原料、硝硫混酸为硝化剂,研究了甲苯连续二硝化反应过程基本规律。提高反应温度、增大硝酸与甲苯的摩尔比、降低混酸含水量、减小硝硫摩尔比、集成釜式搅拌操作有利于DNT... 详细信息

为实现二硝基甲苯(DNT)的安全高效生产,采用微反应技术,以甲苯为原料、硝硫混酸为硝化剂,研究了甲苯连续二硝化反应过程基本规律。提高反应温度、增大硝酸与甲苯的摩尔比、降低混酸含水量、减小硝硫摩尔比、集成釜式搅拌操作有利于DNT的生成;降低反应温度、提高混酸含水量和硝硫摩尔比,有利于降低2,4-/2,6-DNT比值。针对80/20DNT产品进行了硝化工艺优化。在反应温度75℃、混酸含水量14%(质量分数)、硝硫摩尔比1/4或1/3、搅拌时间5 min条件下,产物中一硝基甲苯(MNT)含量小于0.2%,2,4-和2,6-DNT含量大于96%,2,4-/2,6-DNT比值小于4.25,其他DNT异构体含量均小于4%,符合行业标准。绝热条件下,室温进料,混酸含水量14%(质量分数),硝硫摩尔比1/4,搅拌时间10min,生产的产品质量符合行业标准。研究结果为甲苯连续二硝化工艺开发及80/20DNT产品的连续制备提供了基础。

关键词：微反应器微通道过程强化硝化二硝基甲苯

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脑小血管病血液生物标志物的研究进展

中风与神经疾病杂志 2024年第4期41卷 319-324页

作者：饶晨(综述) 朱蕾(审校) 安徽理工大学第一附属医院神经内科安徽淮南232007

脑小血管疾病(CSVD)是一组由各种病因引起的关于脑血管系统病变,从而导致一系列临床、影像学、病理表现的动态性血管性疾病。人类预期寿命的普遍增长,高患病率、高复发率的特征使CSVD受到普遍关注。随着影像学、神经病理生理学等研究发... 详细信息

脑小血管疾病(CSVD)是一组由各种病因引起的关于脑血管系统病变,从而导致一系列临床、影像学、病理表现的动态性血管性疾病。人类预期寿命的普遍增长,高患病率、高复发率的特征使CSVD受到普遍关注。随着影像学、神经病理生理学等研究发展,CSVD患者的发病机制和诊断治疗取得些许进展。目前,研究人员发现通过对CSVD血液生物标志物的研究可能有助于提高疾病早期诊断、早期干预及改善预后。并且血液生物标志物的易取性及简便性使其在临床上能具有更广泛的应用前景。本文就CSVD相关血液生物标志物的研究进展进行综述。

关键词：脑小血管病生物标志物蛋白质基因血浆代谢物

Problems and Countermeasures in Benefit Linkage between Agricultural Leading Enterprises and Farmers

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Asian Agricultural Research 2020年第4期12卷 17-19,23页

作者： rao chen Weimin YANG Zhenghe ZHANG Economics and Management School Beijing University of Agriculture/Beijing New Socialist Countryside Construction Research Base Beijing 102206 China Library of Beijing University of Agriculture Beijing 102206 China Economics and Management School China Agricultural University Beijing 100083 China

The agricultural leading enterprises and farmers have formed a mutual linkage,mutual restraint,and interdependent benefit linkage mechanism.This paper mainly analyzes the existing problems in the benefit linkage between the agricultural leading enterprises and farmers,and draws on the successful domestic benefit linkage model,and comes up with policy recommendations to provide an effective approach for agricultural leading enterprises to promote development of farmers.

关键词： Agricultural leading enterprise Farmers Benefit linkage Linkage model

Research on Dairy Consumption of Rural Residents in Yanqing District of Beijing

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Asian Agricultural Research 2020年第11期12卷 7-8,15页

作者： Huidong GAO rao chen Weimin YANG Shilong ZHANG School of Economics and Management Beijing University of Agriculture/Beijing New Countryside Construction Research Base Beijing 102206 China Library of Beijing University of Agriculture Beijing 102206 China

Taking the rural residents in Yanqing District of Beijing as the research object,through field investigations and interviews,it is found that the main characteristics,income and expenditure level,preference and cognitive level of rural residents are the factors that affect the dairy consumption behavior of rural residents.Using the bivariate regression model for empirical analysis,it is concluded that rural residents'occupation,monthly average income,purchase expenditure and attitude towards dairy safety have a significant impact on rural residents'dairy consumption behavior,and then relevant constructive suggestions are put forward to guide rural residents'balanced consumption.

关键词： Rural residents Dairy consumption Consumption behavior Influencing factors

Enlightenment of Development of Japanese and Germen Agricultural Management Main Body to China

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Asian Agricultural Research 2020年第10期12卷 1-3页

作者： Zehong NIU rao chen Weimin YANG Shilong ZHANG Economics&Management School Beijing University of Agriculture/Beijing New Countryside Construction Research BaseBeijing 102206China Library of Beijing University of Agriculture Beijing 102206China

As shown in the agricultural development experience of various countries in the world,the agricultural operating entity has become an effective means to increase the agricultural production efficiency and establish a scientific management model.Promoting the continuous improvement of the modern agricultural management system is not only an important means for solving the three rural issues in China,but also a key measure to enhance China's agricultural competitiveness.This paper introduced the basic situation of agricultural operating entities in Japan and Germany,summarized their advanced experience,and finally came up with feasible recommendations for enhancing the competitive advantages of agricultural operating entities in China.

关键词： Agricultural operating entities Japan Germany Experience reference

Tunable quantum dots in monolithic Fabry-Perot microcavities for high-performance single-photon sources

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Light(Science & Applications) 2024年第2期13卷 325-332页

作者： Jiawei Yang Yan chen Zhixuan rao Ziyang Zheng Changkun Song Yujie chen Kaili Xiong Pingxing chen Chaofan Zhang Wei Wu Ying Yu Siyuan Yu State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510006China Institute for Quantum Science and Technology College of ScienceNational University of Defense TechnologyChangsha 410073China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China Hunan Key Laboratory of Quantum Information Mechanism and Technology National University of Defense TechnologyChangsha 410073 HunanChina Hefei National Laboratory Hefei 230088China

Cavity-enhanced single quantum dots(QDs)are the main approach towards ultra-high-performance solid-state quantum light sources for scalable photonic quantum technologies.Nevertheless,harnessing the Purcell effect requires precise spectral and spatial alignment of the QDs’emission with the cavity mode,which is challenging for most cavities.Here we have successfully integrated miniaturized Fabry-Perot microcavities with a piezoelectric actuator,and demonstrated a bright single-photon source derived from a deterministically coupled QD within this microcavity.Leveraging the cavity-membrane structures,we have achieved large spectral tunability via strain tuning.On resonance,a high Purcell factor of~9 is attained.The source delivers single photons with simultaneous high extraction efficiency of 0.58,high purity of 0.956(2)and high indistinguishability of 0.922(4).Together with its compact footprint,our scheme facilitates the scalable integration of indistinguishable quantum light sources on-chip,therefore removing a major barrier to the development of solid-state quantum information platforms based on QDs.

关键词： quantum removing purity

Alterations in the human oral microbiome in cholangiocarcinoma

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Military Medical Research 2023年第5期10卷 726-729页

作者： Ben-chen rao Gui-Zhen Zhang Ya-Wen Zou Tong Ren Hong-Yan Ren Chao Liu Zu-Jiang Yu Zhi-Gang Ren Department of Infectious Diseases the First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Jinan Microecological Biomedicine Shandong Laboratory Jinan 250000China Gene Hospital of Henan Province Precision Medicine Centerthe First Affiliated Hospital of Zhengzhou Univer‑sityZhengzhou 450052China Department of Pharmacy the First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Shanghai Mobio Biomedical Technology Co. Ltd.Shanghai 201111China

Dear Editor,Alterations in the human microbiome are closely related to various hepatobiliary diseases.Gut microbial dysbiosis has been found in patients with cholangiocarcinoma(CCA)[1].However,the characteristics of o... 详细信息

关键词： Cholangiocarcinoma Oral microbiome Diagnostic biomarker Random forest model 16S rRNA MiSeq sequencing