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基于文献计量的国内CALIPSO卫星大气气溶胶研究进展与趋势分析

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光学技术 2024年第4期50卷 432-440页

作者：胡澄宇张元军杜欢 Lim Hwee San 马来西亚理科大学物理学院马来西亚槟城11800 四川水利职业技术学院四川成都611231

CALIPSO卫星搭载的云-气溶胶正交极化激光雷达(CALIOP)能为大气气溶胶研究提供高分辨率的气溶胶和云垂直廓线信息,对大气气溶胶的垂直分布研究有着重要的意义。对国内CALIPSO卫星大气气溶胶的历史研究进行了回顾,并基于Citespace文献计... 详细信息

CALIPSO卫星搭载的云-气溶胶正交极化激光雷达(CALIOP)能为大气气溶胶研究提供高分辨率的气溶胶和云垂直廓线信息,对大气气溶胶的垂直分布研究有着重要的意义。对国内CALIPSO卫星大气气溶胶的历史研究进行了回顾,并基于Citespace文献计量分析软件,对17年来该领域的国内知网(CNKI)学术期刊数据库收录的286篇学术论文进行了研究进展和研究热点与趋势的可视化分析。内容包括历史发文量分析,研究机构分析,研究作者团体分析,他引分析,关键词共现分析,突现关键词分析,关键词聚类分析。对CALIPSO大气气溶胶研究的进展、热点和趋势进行了全方面的总结。

关键词： CALIPSO 气溶胶文献计量 Citespace 热点趋势

A new self-adaptive remeshing approach

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High Technology Letters 2006年第2期12卷 154-159页

作者：吴勇 He yuanjun zhang Lin Deparment of Computer Science ＆ Engineering Shanghai Jiaotong University Shanghai 200030 P.R. China

This paper proposes a self-adaptive approach to converting irregular genus-O meshes into those with subdivision connectivity. To assure a maximal utilization of the multiresolution techniques on the remesh, we map the original mesh onto the unit sphere and construct a base mesh with only four vertices. We also introduce a self-adaptive relocation operation, which is used to adapt the vertex distribution of the spherical subdivision mesh to that of the parameterized mesh, to improve the visual appearance of the remesh. The experimental results show that our method can not only make the number of irregular vertices in the remesh as small as possible, but also preserve the details of the original mesh well.

关键词： self-adaptive remeshing subdivision connectivity spherical parametrization multiresolution

测压点的设置对脱硝SCR反应器阻力测定的影响

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江苏建材 2024年第2期 1-1,4页

作者：陈学功刘云张元俊浙江大维高新技术股份有限公司浙江金华321000

随着水泥企业氮氧化物超低排放工程(主要为SCR脱硝技术路径)的推广普及,众多水泥企业的生产管理者越来越关注建设SCR系统给原生产线带来的阻力增加,如何优化设计与系统集成技术的最佳匹配是众多环保科技工作者重点要解决的问题。文章简... 详细信息

随着水泥企业氮氧化物超低排放工程(主要为SCR脱硝技术路径)的推广普及,众多水泥企业的生产管理者越来越关注建设SCR系统给原生产线带来的阻力增加,如何优化设计与系统集成技术的最佳匹配是众多环保科技工作者重点要解决的问题。文章简要介绍了在建设SCR系统的时候,科学设置测压点对于系统压差尤其是SCR反应器压差的测定准确性和生产管理准确调度都非常有意义。

关键词： SCR反应器压差反应器测压点静压动压

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面向6G的星地融合网络频谱共享技术

中兴通讯技术 2024年第4期30卷 50-56页

作者：瞿重希毛浩斌许憧张远钧肖振宇北京航空航天大学中国北京100191

卫星网络被公认为是下一代移动通信系统的重要组成部分,其与现有的地面蜂窝网络实现优势互补形成星地融合网络,可以为全球范围内的海量用户提供无处不在的宽带接入服务。而两网如何高效共享有限的频谱资源、缓解同频共存干扰成为当前的... 详细信息

卫星网络被公认为是下一代移动通信系统的重要组成部分,其与现有的地面蜂窝网络实现优势互补形成星地融合网络,可以为全球范围内的海量用户提供无处不在的宽带接入服务。而两网如何高效共享有限的频谱资源、缓解同频共存干扰成为当前的技术难点与热点问题之一。分析了星地融合网络频谱共享时存在的典型干扰类型,并对星地频谱共享场景中系统间干扰进行了仿真。介绍了星地频谱共享需要进一步研究的关键技术,并总结了星地融合网络频谱共享面临的挑战。

关键词： 6G 星地融合网络频谱共享同频干扰

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Geometric effects of fuel regression rate in hybrid rocket motors

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Science China(Technological Sciences) 2016年第5期59卷 807-813页

作者： CAI GuoBiao zhang yuanjun WANG PengFei HUI Tian ZHAO Sheng YU NanJia School of Astronautics Beihang University Beijing 100191 China Beijing Institute of Aerospace Systems Engineering Beijing 100076 China

The geometric configuration of the solid fuel is a key parameter affecting the fuel regression rate in hybrid rocket motors. In this paper, a semi-empirical regression rate model is developed to investigate the geometric effect on the fuel regression rate by incorporating the hydraulic diameter into the classical model. The semi-empirical model indicates that the fuel regression rate decreases with increasing hydraulic diameter and is proportional to dh?0.2 when convective heat transfer is dominant. Then a numerical model considering turbulence, combustion, solid fuel pyrolysis, and a solid–gas coupling model is established to further investigate the geometric effect. Eight motors with different solid fuel grains are simulated, and four methods of scaling the regression rate between different solid fuel grains are compared. The results indicate that the solid fuel regression rates are approximate the same when the hydraulic diameters are equal. The numerical results verify the accuracy of the semi-empirical model.

关键词： geometric effect regression rate hydraulic diameter hybrid rocket motor

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“肝病及脾”理论辨治甲状腺结节应用探析

亚太传统医药 2024年第3期20卷 120-123页

作者：张元俊向楠周广文湖北中医药大学第一临床学院湖北武汉430061 湖北中医药大学湖北武汉430061

甲状腺结节属中医学“瘿病”范畴,在其发病机制中,肝脾为主要病变脏腑,其治疗也多以调治肝脾为主。《金匮要略》中“见肝之病,知肝传脾,当先实脾”,阐述了肝病及脾的思想,并提出肝病治脾的理论依据,认为肝病可传至脾,调补脾脏,可防止疾... 详细信息

甲状腺结节属中医学“瘿病”范畴,在其发病机制中,肝脾为主要病变脏腑,其治疗也多以调治肝脾为主。《金匮要略》中“见肝之病,知肝传脾,当先实脾”,阐述了肝病及脾的思想,并提出肝病治脾的理论依据,认为肝病可传至脾,调补脾脏,可防止疾病进展、缩短病程、增加疗效等。研究发现,“肝病及脾”理论与甲状腺结节的发病机制、治疗等密切相关。

关键词：肝病及脾瘿病甲状腺结节《金匮要略》

Effect of Fe_(2)O_(3) on the Formation of Micro Glass Beads under Air Staged Combustion

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Journal of Harbin Institute of Technology(New Series) 2022年第3期29卷 46-56页

作者： yuanjun zhang Dakai Wang Xingxing Cheng Zhiqiang Wang School of Energy and Power Engineering Shandong UniversityJinan 250061China

The effect of Fe_(2)O_(3) on the formation of micro glass beads(MGBs)under air staged combustion was *** experimental temperature was 1450℃,and Hegang bituminous coal was used as the experimental object.X⁃ray diffractometer(XRD),ash fusion tester,viscosity formula and scanning electron microscopy(SEM)were used to analyze the fly *** Measurer 1.2 software was used to measure the diameter of *** results showed that with the increase of Fe_(2)O_(3) in Hegang coal,the glass phase in fly ash first increased and then *** the amount of Fe_(2)O_(3) was 15%,the content of the glass phase was the highest,which was 51.26%.The ash melting point first decreased and then increased,while the viscosity gradually decreased and the particles gradually became *** the increase of Fe_(2)O_(3),the proportion of MGBs with particle size less than 10μm increased *** the above results,it can be concluded that the addition of Fe_(2)O_(3) is conducive to the formation of MGBs and the reduction of particle size.

关键词： micro glass beads fly ash Fe_(2)O_(3) air staged combustion

Unstable evolution of railway slope under the rainfall-vibration joint action

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Journal of Mountain Science 2024年第4期21卷 1419-1431页

作者： DONG Haoyu WANG Jiading zhang Dengfei LI Lin XU yuanjun State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China

Understanding the unstable evolution of railway slopes is the premise for preventing slope failure and ensuring the safe operation of ***,as two major factors affecting the stability of railway slopes,few scholars have explored the unstable evolution of railway slopes under the joint action of *** on the model test of sandy soil slope,the unstable evolution process of slope under locomotive vibration,rainfall,and rainfall-vibration joint action conditions was simulated in this *** comparing and analyzing the variation trends of soil pressure and water content of slope under these conditions,the change laws of pore pressure under the influence of vibration and rainfall were *** main control factors affecting the stability of slope structure under the joint action conditions were further *** with the slope failure phenomena under these three conditions,the causes of slope instability resulting from each leading factor were ***,according to the above conclusions,the unstable evolution of the slope under the rainfall-vibration joint action was *** test results show that the unstable evolution process of sandy soil slope,under the rainfall-vibration joint action,can be divided into:rainfall erosion cracking,vibration promotion penetrating,and slope instability sliding three *** the process of slope unstable evolution,rainfall and vibration play the roles of inducing and promoting slide *** addition,the deep cracks,which are the premise for the formation of the sliding surface,and the violent irregular fluctuation of soil pressure,which reflects the near penetration of the sliding surface,constitute the instability characteristics of the railway slope *** paper reveals the unstable evolution of sandy soil slopes under the joint action of rainfall-vibration,hoping to provide the theoretical basis for the early warning and prevention technology of railway slopes.

关键词： Rainfall vibration joint action Small scale model tests Unstable evolution process Unstable characteristics Inducing sliding and promoting sliding

Full sexual maturity-cycle exposure to environmentally relevant concentrations of 17β-estradiol decreases reproductive capacity of zebrafish

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Journal of Environmental Sciences 2024年第3期137卷 580-592页

作者： Yongkang zhang yuanjun Jiang Qian Sun Meng Li Sheng Chen Jingyu Liang Chunsheng Liu College of Fisheries Huazhong Agricultural UniversityWuhan 430070China School of Environmental Studies China University of GeosciencesWuhan 430074China

17β-Estradiol(E2)has been widely detected in natural water and treatment with E2 induces potential endocrine disrupting effects in ***,effects on fish fecundity and steroid system after treatment with environmentally relevant concentrations of E2 for the full sexual maturation cycle remain *** this study,zebrafish were treatment with 0,10 or100 ng/L E2 from embryo to adult stage,and effects on gonadal development and differentiation,steroid hormone levels,transcription of genes associated with the hypothalamic-pituitary-gonadal-liver(HPG)axis in adults and fertilization rate of offspring were *** results showed that treatment with E2 lead to increased number of feminization in *** females,E2 decreased cumulative amount of spawning and inhibited the maturation of *** males,E2 inhibited the maturation and motility of sperm,as well as decreased the movement speed of *** adverse effects on sperm might be responsible for the reduced fertilization observed in *** addition,treatment with E2 changed the levels of steroid hormones in zebrafish gonad and altered the transcriptional levels of genes associated with HPG axis,which is responsible for the regulation of germ cells maturation and gonadal development in ***,these results suggested that treatment with environmentally relevant concentrations of E2 for the full sexual maturity cycle resulted in adverse effects on reproduction in zebrafish.

关键词： Environmental estrogen Zebrafish Fecundity Gonadal development Endocrine disruption