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基于留守儿童健康成长的新媒体内容产品设计与传播

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丝网印刷 2024年第10期 98-101页

作者：鲍梦迪秦佳慧王御展安徽工程大学设计学院

基于留守儿童成长现状,通过“三下乡”的形式实地调查其成长环境,研究纸媒与新媒体融合传播策略,加强互动体验,有效地解决留守儿童的成长陪伴教育问题。

关键词：留守儿童新媒体内容产品设计与传播

The application of fair value in the non-monetary assets transaction

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International English Education Research 2016年第7期 76-78页

作者： qin jiahui Shanghai University of Engineering Science No.333 Longteng Road shanghai China

Since issued new accounting standards for enterprises in our country, our country the non-monetary assets transaction is using fair value measurement. In the fair value measurement has advantages and disadvantages. Such as can response the present value of enterprise assets, improve the relevance of accounting information. But it also has some problems. Based on the application of fair value in the non-monetary assets exchange, analysis on the problems existing in the practical application, and proposes the corresponding countermeasures and Suggestions.

关键词： Fair value the Non-monetary assets transaction Problems Suggestions

Surface air temperature change in the Wuyi Mountains,southeast China

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Journal of Mountain Science 2024年第6期21卷 1992-2004页

作者： qin Yihui WEI Yuxing LU Jiayi MAO jiahui CHEN Xingwei GAO Lu CHEN Ying LIU Meibing DENG Haijun Institute of Geography Fujian Normal UniversityFuzhou 350117China National Demonstration Center for Experimental Geography Education Fujian Normal UniversityFuzhou 350117China School of Geographical Science Fujian Normal UniversityFuzhou 350117China Fujian Provincial Engineering Research Center for Monitoring and Assessing Terrestrial Disasters Fujian Normal UniversityFuzhou 350117China Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education Fujian Normal UniversityFuzhou 350117China

Detecting changes in surface air temperature in mid-and low-altitude mountainous regions is essential for a comprehensive understanding of warming trend with *** use daily surface air temperature data from 64 meteorological stations in Wuyi Mountains and its adjacent regions to analyze the spatio-temporal patterns of temperature *** results show that Wuyi Mountains have experienced significant warming from 1961 to *** warming trend of the mean temperature is 0.20℃/decade,the maximum temperature is 0.17℃/decade,and the minimum temperature is 0.26℃/*** 1961-1990,more than 63%of the stations showed a decreasing trend in annual mean temperature,mainly because the maximum temperature decreased during this ***,in 1971-2000,1981-2010 and 1991-2018,the maximum,minimum and mean temperatures *** fastest increasing trend of mean temperature occurred in the southeastern coastal plains,the quickest increasing trend of maximum temperature occurred in the northwestern mountainous region,and the increase of minimum temperature occurred faster in the southeastern coastal and northwestern mountainous regions than that in the central ***,this study suggests that elevation does not affect warming in the Wuyi *** results are beneficial for understanding climate change in humid subtropical middle and low mountains.

关键词： Climate change Surface air temperature Temporal and spatial changes Mann-Kendall nonparametric test Wuyi Mountains

Ultrahigh-brightness 50 MeV electron beam generation from laser wakefield acceleration in a weakly nonlinear regime

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Matter and Radiation at Extremes 2024年第3期9卷 4-10页

作者： Zhongtao Xiang Changhai Yu Zhiyong qin Xuhui Jiao jiahui Cheng Qiaoxuan Zhou Gatie Axi Jianghua Jie Ya Huang Jintan Cai Jiansheng Liu Department of Physics Shanghai Normal UniversityShanghai 200234China

We propose an efficient scheme to produce ultrahigh-brightness tens of MeV electron beams by designing a density-tailored plasma to induce a wakefield in the weakly nonlinear regime with a moderate laser energy of 120 *** this scheme,the second bucket of the wakefield can have a much lower phase velocity at the steep plasma density down-ramp than the first bucket and can be exploited to implement longitudinal electron injection at a lower laser intensity,leading to the generation of bright electron beams with ultralow emittance together with low energy ***-dimensional particle-in-cell simulations are carried out and demonstrate that high-quality electron beams with a peak energy of 50 MeV,ultralow emittance of28 nm rad,energy spread of 1%,charge of 4.4 pC,and short duration less than 5 fs can be obtained within a 1-mm-long tailored plasma density,resulting in an ultrahigh six-dimensional brightness B6D,n of2×1017 A/m2/0.1%.By changing the density parameters,tunable bright electron beams with peak energies ranging from 5 to 70 MeV,a small emittance of B0.1 mm mrad,and a low energy spread at a few-percent level can be *** bright MeV-class electron beams have a variety of potential applications,for example,as ultrafast electron probes for diffraction and imaging,in laboratory astrophysics,in coherent radiation source generation,and as injectors for GeV particle accelerators.

关键词： weakly nonlinear acceleration

Interaction between the core and the edge for ion cyclotron resonance heating based on artificial absorption plasma model

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Plasma Science and Technology 2024年第10期26卷 65-72页

作者： Zhuoqi LIU jiahui ZHANG Kaibang WU Xinjun ZHANG Chengming qin Feng WANG Zhengxiong WANG School of Physics Dalian University of TechnologyDalian 116024People’s Republic of China School of Aerospace Science and Technology Xidian UniversityXi’an 710071People’s Republic of China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China

In numerical simulations of the ion cyclotron range of frequencies(ICRF)wave heating scheme,core solvers usually focus on wave propagation and absorption mechanisms within the core plasma ***,the realistic scrape-off layer(SOL)plasma is usually simplified,making it difficult to have deeper understanding of wave propagation and absorption within the *** this work,we employ a cold plasma assumption and an artificial absorption mechanism based on the approach of reference(Zhang et al 2022 *** 62076032),to study wave propagation and absorption in the realistic SOL plasma of the *** the exponential decay of the total coupled power with respect to the toroidal mode numbers,several fluctuations are observed in the case of low collisional *** fluctuations may be caused by the cavity modes associated with specific toroidal mode *** to the presence of cut-off densities,the edge power losses and the total coupled power exhibit different behaviors before and after the cut-off layer is“open”.Furthermore,the simulation results obtained from the kinetic model in reference(Zhang et al 2022 *** 62076032)is *** suggests that both the core-edge combined model and the artificial mechanism are capable of simulating wave propagation and absorption.

关键词： ICRF EAST artificial mechanism collisional frequency

Spatiotemporal characteristics of seed rain and soil seed bank of artificial Caragana korshinskii Kom. forest in the Tengger Desert, China

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Journal of Arid Land 2024年第4期16卷 550-566页

作者： SHEN Jianxiang WANG Xin WANG Lei WANG jiahui QU Wenjie ZHANG Xue CHANG Xuanxuan YANG Xinguo CHEN Lin qin Weichun ZHANG Bo NIU Jinshuai College of Ecological Environment Ningxia UniversityYinchuan 750021China Key Laboratory of Restoration and Reconstruction of Degraded Ecosystems in Northwest China Ministry of EducationNingxia UniversityYinchuan 750021China College of Agriculture Ningxia UniversityYinchuan 750021China

Vegetation restoration and reconstruction are effective approaches to desertification control and achieving social and economic sustainability in desert ***,the self-succession ability of native plants during the later periods of vegetation restoration remains ***,this study was conducted to bridge the knowledge gap by investigating the regeneration dynamics of artificial forest under natural *** information of seed rain and soil seed bank was collected and quantified from an artificial Caragana korshinskii *** in the Tengger Desert,*** germination tests were conducted in a laboratory *** analysis of species quantity and diversity in seed rain and soil seed bank was conducted to assess the impact of different durations of sand fixation(60,40,and 20 a)on the progress of vegetation restoration and ecological conditions in artificial *** *** results showed that the top three dominant plant species in seed rain were Echinops gmelinii Turcz.,Eragrostis minor Host.,and Agropyron mongolicum Keng.,and the top three dominant plant species in soil seed bank were ***,Chloris virgata Sw.,and *** restoration period increased,the density of seed rain and soil seed bank increased first and then *** for species richness,as restoration period increased,it gradually increased in seed rain but decreased in soil seed *** was a positive correlation between seed rain density and soil seed bank density among all the three restoration *** species similarity between seed rain or soil seed bank and aboveground vegetation decreased with the extension of restoration *** shape of the seeds,specifically those with external appendages such as spines and crown hair,clearly had an effect on their dispersal,then resulting in lower seed density in soil seed *** addition,precipitation was a crucial factor in promoting rapid germination,also resulting in lower seed density in soi

关键词： ecological restoration soil seed bank seed rain artificial forest vegetation desertification Caragana korshinskii Tengger Desert

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数字经济、技术创新与中国企业高质量出口

学术研究 2022年第10期 110-116页

作者：林峰秦佳慧华南理工大学经济与金融学院广东广州510006

随着新一代数字技术的加速应用,推进中国对外贸易高质量发展的新动能不断凝聚。采用腾讯研究院大数据测算的数字经济指数与2015年中国工业企业数据库、中国海关数据库进行匹配,实证考察数字经济对中国制造业企业出口产品质量的影响及作... 详细信息

随着新一代数字技术的加速应用,推进中国对外贸易高质量发展的新动能不断凝聚。采用腾讯研究院大数据测算的数字经济指数与2015年中国工业企业数据库、中国海关数据库进行匹配,实证考察数字经济对中国制造业企业出口产品质量的影响及作用机制发现,数字经济发展显著促进了中国企业的出口产品质量升级。在考虑样本选择性偏差和内生性问题之后,这一结果依然稳健。异质性检验表明,数字经济对国有企业、技术密集型企业、东部地区企业和老企业出口产品质量的提升作用更为显著。进一步结合中国专利数据库的机制检验发现,技术创新是数字经济提升企业出口产品质量的重要渠道。

关键词：数字经济出口产品质量技术创新

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《周礼》天子庙享卜日礼仪考

浙江大学学报（人文社会科学版） 2009年第1期39卷 135-147页

作者：吴土法秦佳慧浙江大学古籍研究所浙江杭州310028

《周礼》中庙享"前期十日……卜日"的仪制,与西周金文及《仪礼》等文献中的记载吻合,关于主持卜日的职官,则《大宰职》和《大宗伯职》二经所述重复龃龉。从《周礼》中可以钩稽出取龟、选龟、衅龟、攻龟、开龟五项整治卜龟的工序以及陈... 详细信息

《周礼》中庙享"前期十日……卜日"的仪制,与西周金文及《仪礼》等文献中的记载吻合,关于主持卜日的职官,则《大宰职》和《大宗伯职》二经所述重复龃龉。从《周礼》中可以钩稽出取龟、选龟、衅龟、攻龟、开龟五项整治卜龟的工序以及陈龟、贞龟、定龟、视高、命龟、作龟、占龟、系币八项天子庙享卜日的礼事,其中取龟、选龟、衅龟、攻龟、开龟、命龟、作龟、占龟、系币九项均能从地下出土实物和出土文献中找到可靠的依据;陈龟、贞龟、定龟、视高四项可以在《仪礼》、《礼记》等载籍中得到佐证;衅龟、开龟、占龟诸项与殷礼有着明显的不同,与周礼则彼此契合。这不仅证实了《周礼》中有关龟卜事宜的具体材料基本上是可信的,而且还说明了龟卜礼仪当属周礼内容。

关键词：周礼宗庙祭祀卜日

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小鼠玻璃体血管退化与视网膜血管发育的关系

中华实验眼科杂志 2023年第7期41卷 623-629页

作者：秦佳慧郭雅图张伟天津医科大学眼科临床学院天津300020 天津市眼科医院、天津市眼科研究所、天津市眼科学与视觉科学重点实验室天津300020

目的探索C57BL/6J小鼠玻璃体血管退化与视网膜血管发育的过程及两者之间的关系。方法取75只SPF级出生后第1天(P1)的C57BL/6J健康小鼠,采用随机数表法将其分为对照组65只和氧诱导视网膜病变(OIR)模型组10只。其中对照组不做处理,OIR模型... 详细信息

目的探索C57BL/6J小鼠玻璃体血管退化与视网膜血管发育的过程及两者之间的关系。方法取75只SPF级出生后第1天(P1)的C57BL/6J健康小鼠,采用随机数表法将其分为对照组65只和氧诱导视网膜病变(OIR)模型组10只。其中对照组不做处理,OIR模型组自P7连续在体积分数(75±3)%氧气环境中饲养5 d,并于P12开始在常氧状态下饲养5 d。对照组分别于P1~P12、P17任意处死5只小鼠并摘取眼球进行实验。OIR模型组分别于P12、P17各处死5只小鼠并摘取眼球进行实验。采用体式显微镜观察不同日龄小鼠玻璃体动脉(HA)、玻璃体固有血管(VHP)、晶状体血管膜(TVL)的血管数量;另选取5只15个月龄的成年小鼠,采用光学相干断层扫描仪检查玻璃体脉管系统的存在情况。采用免疫荧光染色法观察视网膜星形胶质细胞与视网膜血管发育、VHP的关系。结果对照组中,HA在小鼠眼球发育中退化不明显,出生后15个月的成年鼠中依然存在HA;VHP数量在小鼠P4~P8急速减少,在P10时变化趋于稳定,为(2.33±1.32)个,P17时数量稳定在(1.80±0.92)个;TVL数量在P5~P9急剧下降,在P10时TVL为(2.30±1.42)个,大部分TVL血管呈透明状态,不再有血供,P17时TVL降至(0.30±0.48)个。视网膜血管在星形胶质细胞的引导下自P1开始从视盘向四周生长,P8时蔓延至视网膜周边,形成视网膜初级血管网。在视网膜表层血管发育的过程中玻璃体血管出现同步退化,视网膜血管覆盖位置的VHP密度减小,管径变细,当视网膜血管发育至周边时VHP则脱离视网膜,且星形胶质细胞与VHP无结构上的重合。OIR模型组小鼠P12时VHP数量为(2.14±0.90)个,明显低于P17时的(4.60±1.35)个,差异有统计学意义(t=4.188,P<0.001);P12时TVL数量为(2.90±1.55),明显低于P17时的(5.80±1.75)个,差异有统计学意义(t=4.668,P<0.001)。OIR模型组与对照组小鼠P12时VHP和TVL数量比较,差异均无统计学意义(t=0.429,P=0.232;t=1.116,P=0.134);但在P17时,OIR模型组小鼠VHP和TVL数量明显多于对照组,差异均有统计学意义(t=5.422、9.574,均P<0.001)。结论小鼠玻璃体血管系统中,VHP和TVL在P10退行变化趋于稳定,而HA退化不明显。小鼠玻璃体血管的正常退化依赖于视网膜血管和星形胶质细胞的正常发育;视网膜缺氧延缓了玻璃体血管退化。

关键词：玻璃体视网膜血管星形胶质细胞小鼠

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