搜索筛选:
搜索耗时0.7626秒,为你在为你在102,267,441篇论文里面共找到 150 篇相符的论文内容
类      型:
[期刊论文] 作者:赵淑琼,朱建青, 来源:云南大学学报(自然科学版) 年份:2022
研究时间尺度上二阶Lagrange系统的Mei对称性及守恒量.以时间尺度上二阶Lagrange系统的运动方程为基础,给出系统中的Lagrange方程在无限小变换下的Mei对称性及判定方程,并建立Mei对称性导致守恒量条件...
[期刊论文] 作者:贾中芝,曹妍,李绍钦, 来源:介入放射学杂志 年份:2022
血管内金属植入物(MEI)已广泛应用于临床.含镍MEI引起的过敏反应罕见,多为个案报道.Ⅳ型超敏反应在含镍MEI相关过敏反应中起关键作用.预防措施尤为重要,应根据患者是否有金属过敏史和皮肤斑贴试验结果,...制定具体预防措施.治疗方法包括药物对症治疗和取出MEI治疗(移除过敏源).临床医师应掌握含镍MEI过敏反应相关知识,尽量避免MEI过敏反应发生.一旦发生,应给予适当诊断和治疗,避免严重并发症发生....
[学位论文] 作者:申思远, 来源:申思远 年份:2022
本文主要研究内容分为两个部分,一是在裂殖酵母蛋白质Mei2特异性结合...
[期刊论文] 作者:LI KAIZHI, 来源:中国与非洲(英文版) 年份:2022
Over 10 years ago, Xue Youguo had thought of going to Africa, but did not do it due to his young kid....
[期刊论文] 作者:Hua Li,Bo Sun,Huijun Wang,Xing Yuan, 来源:大气和海洋科学快报(英文版) 年份:2022
2020年发生在江淮流域,朝鲜半岛和日本南部(简称梅雨区)的暴力梅造成了巨大的人员伤亡和经济损失.此次暴力梅的主要特征为:入梅早(6月1日),出梅晚(8月1日)以及较强的梅雨期降水.2020年异常早入梅和晚出梅时期的降水占梅雨期总降水的一半以上.因此,为了深入解析2......
[期刊论文] 作者:陈春晓, 来源:疯狂英语(新读写 年份:2022
篇幅:368词难度:★★★建议用时:7分钟~1On the 5-square-meter balcony of Zhong Liu’s apartment, there is a mini-farm crammed...
[期刊论文] 作者:Zhong Cheng, 来源:北京周报(英文版) 年份:2022
The COVID-19 pandemic, lasting for about two years, has undeniably pre-sented one of the greatest protracted challenges to humanity. Now it is surging with more variants that spread even faster. It has exerted a profound impact on a world d......
[期刊论文] 作者:Zhong Cheng, 来源:北京周报(英文版) 年份:2022
The year 2021 brought nu-merous developments in international and regional arenas, from the COVID-19 world-wide spread and climate change, to the hasty withdrawal of the U.S. from Afghanistan and the renewed atten-tion to the Nuclear Non-Pr......
[期刊论文] 作者:Zhong Cheng, 来源:北京周报(英文版) 年份:2022
The world has been placed on high alert by the escalation of the Russia-Ukraine crisis. The logic behind Russia\'s actions is to protect its national security and to counteract NATO attempts, led by the U.S., to press itself forward onto Ru......
[期刊论文] 作者:Zhong Cheng, 来源:北京周报(英文版) 年份:2022
With the Olympic flame dancing to the drums of the Chinese Year of the Tiger, the Beijing 2022 Games—the first-ever Winter Olympics held in China and its second Olympics after hosting the 2008 Summer Games—concluded on February 20, to be ......
[期刊论文] 作者:Zhong Cheng, 来源:北京周报(英文版) 年份:2022
The Ukraine crisis is holding “a sword of Damocles”over the global economy,UN Secretary General António Guterres has warned, especially over poor, developing countries that face skyrocketing food, fuel and fertilizer prices, and are now ......
[期刊论文] 作者:Zhong Cheng, 来源:北京周报(英文版) 年份:2022
In the ongoing Russia-Ukraine conflict,warplanes, rockets, missiles and artillery units are not the only weapons in use. An information war is proving no less fierce than the fighting taking place on the ground....
[学位论文] 作者:叶灵芝, 来源:扬州大学 年份:2022
[期刊论文] 作者:岳胜如,徐振鑫,杨明豪,彭海峰,孟福军, 来源:湖北农业科学 年份:2022
对有限水资源合理分配、促进绿洲农业和生态环境的健康持续发展至关重要,选择适宜的干旱遥感监测指数是干旱监测面临的问题.基于Landsat 8和实测土壤相对湿度数据,对比分析NDWI、VSWI、TVDI、MEI...在荒漠绿洲区的有效性.结果表明,受人类活动等各种因素影响,4种指数在农田区域(棉田、枣地)效果不理想;4种指数均能反映研究区荒漠土壤相对湿度的空间特征,最佳监测深度为0~10 cm;从相关系数分析,NDWI、MEI...
[学位论文] 作者:林明静, 来源:重庆师范大学 年份:2022
随着信息技术的不断发展,我们的生活和学习都发生了许多的变化。在获取资源的渠道变得越来越广泛的背景下,传统的教育方式在如今高速发展的时代也需要不断的变化来适应现在的时代发展。在探寻新的教学模式来适应新的学习环境,对于现在的学习来说变得十分迫切。......
[期刊论文] 作者:焦玉洁,马德龙, 来源:区域治理 年份:2022
当前大学生党员还存在一些突出问题亟待解决,例如有些大学生党员的理论素质不强、服务意识不足、模范作用不突出.“3X”模式即指学(xue)、心(xin)、先(xian),分别指以“学”为先,提高学生党员理论输出能力...
[期刊论文] 作者:Ming Song,Cheng-Lin Zhong, 来源:稀有金属(英文版) 年份:2022
Aqueous Zn-ion batteries (ZIBs) featuring safety,afford-ability and high energy density may provide a promising solution to the demand for better energy storage devices....
[期刊论文] 作者:ZHONG Wenbin,LIU Xiaofeng, 来源:东华大学学报(英文版) 年份:2022
We consider the global existence and decay of integral solutions to the parabolic-parabolic Keller-Segel system in d-dimension. On the one hand, by Banach fixed point theorem and some properties of heat kernel, we prove the local existence ......
[期刊论文] 作者:Kai-Lei Wang,Xian-Hui Zhong, 来源:中国物理C(英文版) 年份:2022
In this study,by combining the equal spacing rule with recent observations of Ωc(X) and Ξc(X) baryons,we predict the spectrum of the low-lying λ-mode 1P-wave excited ∑c states.Furthermore,their strong decay prop-erties are predicted usi......
[期刊论文] 作者:Dongshu Ou,Zhong Zhao, 来源:中国与世界经济(英文版) 年份:2022
We examine the impact of China\'s higher education expansion on labor market outcomes for young college graduates using China\'s 2005 1 Percent Population Sample Survey.Exploiting variations in the expansion of university places across prov......
相关搜索: