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Cool white light and tunable multicolor emission from Tb^(3+)/Dy^(3+)co-activated glasses under different excitations for WlEDs

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Journal of Rare Earths 2024年第1期42卷 46-56,I0002页

作者： l.Vijayalakshmi K.Naveen Kumar Jong Dae Baek Department of Automotive Engineering Yeungnam UniversityGyeongsanGyeongbuk38541Republic of Korea Department of Mechanical Engineering Yeungnam UniversityGyeongsan38541Republic of Korea

A set of co-doped(Tb^(3+)/Dy^(3+))lithium zinc borate(lZB)glasses were developed by melt *** structural evaluation was performed for synthesized glassy *** Dy^(3+)and Tb^(3+)individually doped glasses exhibit intense yellow and green luminescence bands at 575 nm(^(4)F_(9/2)→^(6)H_(13/2))and543 nm(^(5)D_(4)→^(7)F_(5)),*** sensitization effect of Dy^(3+)on Tb^(3+)was analyzed by increasing the Tb^(3+)content with respect to the optimum Dy^(3+)content(0.5 mol%)in Dy^(3+)/Tb^(3+).The spectral overlay of Dy^(3+)luminescence and Tb^(3+)absorption profiles,Dy^(3+)/Tb^(3+)Pl spectra under different excitations 352,362,376,and 385 nm,shortening decay lifetimes of Dy^(3+)in Dy^(3+)/Tb^(3+)co-activated glasses,energy transfer(ET)parameters,chromaticity coordinates and their corresponding correlated temperatures all help to explain ET from Dy^(3+)to Tb^(3+).At 385 nm of Dy^(3+)excitation,the optimized co-activated(0.5Dy^(3+)+1.0Tb^(3+)):lZB glass displays cool white light *** non-radiative ET from Dy^(3+)to Tb^(3+)is dominated by electric dipole-dipole interaction and its ET efficiency was calculated to be 63%.At the same time,reverse ET from Tb^(3+)to Dy^(3+)was also *** shift in color coordinates from dominant yellow to greenish-yellow,green and white light emission suggests that Dy^(3+)/Tb^(3+)coactivated lZB glasses can be a potential candidate for UV converted multicolor and white light emitting devices.

关键词： Rare earths Photoluminescence Energy transfer Spectral overlap Decay lifetime Multicolor emitting lEDs

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新见十九祀免簋历日与王年考

贵州文史丛刊 2024年第2期 1-9页

作者：张闻玉桂珍明贵州大学先秦史研究中心贵州贵阳550025 复旦大学出土文献与古文字研究中心“古文字与中华文明传承发展工程”协同攻关创新平台上海200433

据新见十九祀免簋铭文“隹王十又九祀,正月既生霸庚戌”之记载,可知该器是一件王年、月份、日干支及月相四要素俱全的西周时期重要青铜器。文章在学界判定该器为西周中期之器的基础上,以月相定点说,采用“四分历”的古天文历术为技术手... 详细信息

据新见十九祀免簋铭文“隹王十又九祀,正月既生霸庚戌”之记载,可知该器是一件王年、月份、日干支及月相四要素俱全的西周时期重要青铜器。文章在学界判定该器为西周中期之器的基础上,以月相定点说,采用“四分历”的古天文历术为技术手段,考定免簋所载王年与历日应当是:周穆王十九年(前988)正月十五日,正月初一朔日为乙未,实际用历司历应取为丙申朔。

关键词：十九祀免簋王年月相定点周穆王

Chronic active and atrophic gastritis as significant contributing factor to the development of gastric cystica profunda

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World Journal of Gastroenterology 2024年第17期30卷 2308-2310页

作者： Veronika Papp Pál Miheller Department of Surgery Transplantation and GastroenterologySemmelweis UniversityBudapest 1082Hungary

Gastric cystica profunda(GCP)is an uncommon but underestimated gastric *** precancerous potential determines its *** addition to previous mucosa injury due to operations,biopsy or polypectomy,chronic active and atrophic gastritis may also lead to the development of *** carefully examining the stomach and taking biopsy samples from the susceptible regions,the stage of atrophy can be *** atrophic gastritis is a risk factor for cancer evolvement and it can also contribute to GCPs *** frequently occur close to early gastric cancers(EGCs)or EGC can arise from the cystic *** resection is an effective and minimally invasive treat-ment in GCP.

关键词： Gastric cystica profunda Chronic active gastritis Atrophic gastritis Operative link for Gastritis Assessment staging Early gastric cancer Endoscopic resection

体育新课标下融大单元与走班制于一体的“精学一项、简学多项”走班制教学新模式探析

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山东体育学院学报 2024年第2期40卷 1-9页

作者：毛振明赵晓丹周琳龙克威郑州大学体育学院河南郑州450001 石家庄铁道大学河北石家庄050043 湖南湘江新区虹桥小学湖南长沙410221

2022年版新课标提出了“教会、勤练、常赛”的新课程理念,同时提出要推进“大单元教学”和“体育走班制教学”的新教学模式,为体育课程教学改革提供了新的教学方法,也为解决体育教学“蜻蜓点水、低级重复、浅尝辄止、半途而废”等老问... 详细信息

2022年版新课标提出了“教会、勤练、常赛”的新课程理念,同时提出要推进“大单元教学”和“体育走班制教学”的新教学模式,为体育课程教学改革提供了新的教学方法,也为解决体育教学“蜻蜓点水、低级重复、浅尝辄止、半途而废”等老问题提供了新的可能性。但仅是“18学时大单元”还不能从根本上解决体育教学碎片化问题,因此,“可选择性的专项化教学”(又称“体育走班制教学”)成为一种有效且具可行性的教学模式,有利于贯彻“教会、勤练、常赛”的教学理念。为了符合新课标对六类运动项目教学的要求,该研究提出了将大单元和走班制融合于一体的“精学一项,简学多项”走班制教学方案,该方案也是完全符合2022年版体育新课标各项要求的教学模式。“精学一项,简学多项”走班制教学既可以让学生精学一项运动项目,有效帮助学生熟练掌握运动技能,也有利于学生接触到较为广泛的运动项目,拓展运动体验广度,以确保“主项不丢、兼项不少”“精学更精、简学适度”的双赢效果。教学实验也表明,“精学一项,简学多项”走班制教学新模式能有效提高学生的运动技能,培养体育兴趣,打造“一生一长”“一校多品”“多项多队”“一师一专”,加快推动“多学段体育课程教学有机衔接和一体化”的实现。

关键词：体育新课标大单元教学体育走班制教学 “精学一项、简学多项”走班制教学新模式

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柳叶蜡梅PAl基因家族的鉴定及表达分析

核农学报 2024年第10期38卷 1836-1846页

作者：张桂华李贺鹏岳春雷俞振明浙江省林业科学研究院浙江杭州310023 浙江中医药大学药学院浙江杭州311402

苯丙氨酸解氨酶(PAl)是苯丙烷代谢的关键限速酶,在调节植物胁迫应答和生长发育方面发挥重要作用。为明确PAl基因家族在柳叶蜡梅生长发育中的功能,本研究系统分析了PAl基因家族成员的理化特征、顺式作用元件、系统发育树、保守基序、染... 详细信息

苯丙氨酸解氨酶(PAl)是苯丙烷代谢的关键限速酶,在调节植物胁迫应答和生长发育方面发挥重要作用。为明确PAl基因家族在柳叶蜡梅生长发育中的功能,本研究系统分析了PAl基因家族成员的理化特征、顺式作用元件、系统发育树、保守基序、染色体定位及共线性关系,并比较了它们在不同组织、叶和花不同时期及不同激素处理下的表达模式。结果显示,7个柳叶蜡梅CsPAl家族基因锚定于5条染色体上,编码413~768个氨基酸,分为2个亚族,与腊梅CpPAl蛋白亲缘关系较近,存在基因复制现象。CsPAl家族基因启动子区域富集大量激素响应与胁迫应答的顺式元件。CsPAl家族基因在柳叶蜡梅不同组织、叶和花不同生长阶段及ABA、MeJA处理下呈现差异表达,CsPAl6在叶中高表达,受ABA、MeJA诱导,与黄酮物质在叶和花不同时期的减少相一致,推测可能与黄酮物质的合成有关。研究结果为将来研究CsPAl基因家族在黄酮生物合成中的功能提供了理论参考。

关键词：柳叶蜡梅 PAl 表达分析黄酮脱落酸

经济区与行政区适度分离改革的实践逻辑——基于川渝高竹新区的考察

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中国西部 2024年第4期 12-22页

作者：吴振明王芳四川省社会科学院科研与外事处成都610071 四川省社会科学院区域经济研究所成都610071

党的二十届三中全会对进一步全面深化改革作出系统部署,强调构建高水平社会主义市场经济体制,健全推动经济高质量发展体制机制,构建支持全面创新体制机制,健全宏观经济治理体系。破解经济区与行政区矛盾是我国创造更加公平、更有活力的... 详细信息

党的二十届三中全会对进一步全面深化改革作出系统部署,强调构建高水平社会主义市场经济体制,健全推动经济高质量发展体制机制,构建支持全面创新体制机制,健全宏观经济治理体系。破解经济区与行政区矛盾是我国创造更加公平、更有活力的市场环境、构建全国统一大市场的必由之路。川渝高竹新区是我国首个明确赋予探索经济区与行政区适度分离改革任务的跨省级新区,考察川渝高竹新区经济区与行政区适度分离改革“如何发生”以及“如何运行”,对于理解经济区与行政区适度分离改革的实践逻辑意义重大。文章基于制度性集体行动框架,构建包括改革触发机制和驱动机制的两阶段分析框架,提出川渝高竹新区的实践逻辑在于以上位规划与渐进式改革相结合的触发机制,以经济管理权限复合一体、各级政府权力交错嵌入和政府间利益联结的驱动机制。实践证明,推进经济区与行政区适度分离改革,需要重视以放权赋能触发改革,建立多层级组织协调机制,建立多元主体利益共享机制,推进跨区域政策标准统一。

关键词：经济区与行政区适度分离改革川渝高竹新区

Time trends and outcomes of gastrostomy placement in a Swedish national cohort over two decades

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World Journal of Gastroenterology 2024年第10期30卷 1358-1367页

作者： Martin löfling Skogar Magnus Sundbom Department of Surgical Sciences Uppsala UniversityUppsala 75185Sweden

BACKGROUND Percutaneous endoscopic gastrostomy(PEG)and laparoscopically inserted gastrostomy have become the gold standard for adult patients and children,respectively,requiring long-term enteral nutrition ***-related mortality is a rare event,often reported to be zero in smaller *** data on 30-d mortality and long-term survival rates after gastrostomy placement are scarce in the *** To study the use of gastrostomies in Sweden from 1998-2019 and to analyze procedure-related mortality and short-term(long-term *** In this retrospective,population-based cohort study,individuals that had received a gastrostomy between 1998-2019 in Sweden were *** were identified in the Swedish National Patient Register,and survival analysis was possible by cross-referencing the Swedish Death *** cohort was divided into three age groups:Children(0-18 years);adults(19-64 years);and elderly(≥65 years).Kaplan-Meier with log-rank test and Cox regression were used for survival *** In total 48682 individuals(52%males,average age 60.9±25.3 years)were *** cohort consisted of 12.0%children,29.5%adults,and 58.5%*** increased use of gastrostomies was observed during the study period,from 13.7/100000 to 22.3/100000 individuals(Pled(about 800 to 1800/year),with a corresponding decrease in open gastrostomy(about 700 to 340/year).laparoscopic gastrostomy increased more than ten-fold(about 20 to 240/year).Overall,PEG,open gastrostomy,and laparoscopic gastrostomy constituted 70.0%(n=34060),23.3%(n=11336),and 4.9%(n=2404),***-related mortality was 0.1%(n=44)overall(PEG:0.05%,open:0.24%,laparoscopic:0.04%).The overall 30-d mortality rate was 10.0%(PEG:9.8%,open:12.4%,laparoscopic:1.7%)and decreased from 11.6%in 1998-2009 vs 8.5%in 2010-2019(Pl rates for children,adults,and elderly were 93.7%,67.5%,a

关键词： Gastrostomy Percutaneous endoscopic gastrostomy Dysphagia Enteral nutrition long-term Survival Complication

Distributed swarm control for multi-robot systems inspired by shepherding behaviors

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Science China(Technological Sciences) 2024年第7期67卷 2191-2202页

作者： SUN GuiBin GU HaiBo lÜJinHu School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Zhongguancun laboratory Beijing 100094China

Swarming behaviors play an eminent role in both biological and engineering research, and show great potential applications in many emerging fields. Traditional swarming models still lack integrity, uniformity, and stability in swarm forming processes,resulting in fragmentation and void phenomena. Inspired by the shepherding behaviors observed in nature, we propose an integrated negotiation-control scheme for distributed swarm control of massive robots. The core idea of this scheme is that the robots at the boundary of the group herd the internal robots to form an equilibrium swarm. For this purpose, we introduce a concept of virtual group center towards which boundary robots herd internal robots. Then, a distributed negotiation mechanism is designed to allow each robot to negotiate the virtual group center only through local interactions with its neighbors. After that, we propose a shepherding-inspired swarm control law to drive a group of robots to form an integrated, uniform, and stable configuration from any initial states. Both numerical and flight simulations are presented to verify the effectiveness of our proposed swarm control scheme.

关键词： swarm control multi-robot system negotiation-control scheme shepherding behavior

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Tomographic reconstruction of the Earth’s magnetosheath from multiple spacecraft:a theoretical study

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Earth and Planetary Physics 2024年第1期8卷 204-214页

作者： A.M.Jorgensen TianRan Sun Y.Huang l.li R.Xu l.Dai Chi Wang New Mexico Institute of Mining and Technology SocorroNMUSA National Space Science Center Chinese Academy of SciencesBeijing 100190China Tsinghua University Beijing 100084China

Following our earlier work on tomographic reconstruction of the magnetosheath soft X-ray emissions with superposed epoch analysis of many images recorded from a single spacecraft we now explore the instantaneous reconstruction of the magnetosheath and magnetopause using a few images recorded simultaneously from a few *** work is motivated by the prospect of possibly having two or three soft X-ray imagers in space in the coming years,and that many phenomena which occur at the magnetopause boundary,such as reconnection events and pressure pulse responses,do not lend themselves as well to superposed epoch *** the reconstruction is successful-which we demonstrate in this paper that it can be-this collection of imagers can be used to reconstruct the magnetosheath and magnetopause from a single image from each spacecraft,allowing for high time resolution *** this paper we explore the reconstruction using,two,three,and four *** show that the location of the subsolar point of the magnetopause can be determined with just two satellites,and that volume emissions of soft X-rays,and the shape of the boundary,can be reconstructed using three or more satellites.

关键词： magnetosheath tomography soft X-ray imaging SMIlE