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[期刊论文] 作者:程惠亭,郝文斌,卫兵兵, 来源:化学工程 年份:2022
指出气体管道压降计算中,传统的等温公式在压降较大时误差大的原因是平均密度假设.由于Cheng-Hao公式推导过程不引入该假设,因此,可以判断Cheng-Hao公式应比传统的等温公式更准确.为证明上述判断...,利用等温公式、韦默思公式、潘汉德公式和Cheng-Hao公式同时计算了天然气长输管道的压降进行对比.结果表明:在管道长度10-250 km、压降在0-50%的范围内,Cheng-Hao公式和韦默思公式...、潘汉德公式的计算结果吻合,说明Cheng-Hao公式有很好的压降范围的普适性,而传统的等温公式在压降达到...
[期刊论文] 作者:张延强,徐志远,杜义安,杨立涛,黄灵,俞鹏飞,胡灿,余建法,徐宏涛,魏云海,虞伟明,程向东, 来源:中华胃肠外科杂志 年份:2022
目的探讨对食管胃结合部腺癌患者进行近端胃切除采用Cheng′sGIRAFFE®重建术(GIRAFFE重建)的功能性效果和术后并发症情况。方法采用描述性病例系列研究的方法。...
[期刊论文] 作者:Jessica Blade, 来源:疯狂英语·初中天地 年份:2022
[学位论文] 作者:Jessica Zhang, 来源:上海交通大学 年份:2022
随着移动短视频社交平台的迅速发展,移动短视频行业正在经历空前激烈的用户竞争,越来越多企业都将战略目标聚焦于提升核心竞争力之上,旨在能够精准地在行业浪潮中脱颖而出不断吸引新用户,同时留住老用户。然而,现有研究对于移动短视频社交平台用户粘性的影响研......
[期刊论文] 作者:Yuan Yuan, 来源:北京周报(英文版) 年份:2022
Her short, bleached-blonde hair has made Caroline Cheng, a maverick among members attending the Fifth...
[期刊论文] 作者:Jiahao Ling,Xiaoping Li,Guo Yang,Tongming Yin, 来源:林业研究(英文版) 年份:2022
In willow germplasm collections, observation has shown that Salix suchowensis Cheng was severely foraged...
[期刊论文] 作者:, 来源:神经药理学报 年份:2022
Antioxidant, NeuroProtecting and Memory-Improving Capabilities of Nutrients using Zebrafish ModelsZHAO Bang-cheng1...
[期刊论文] 作者:张倩倩, 来源:艺术与设计 年份:2022
在这个重要的节日,国内外设计师结合自身品牌文化与中国春节文化,以多元化的形式,赋予福“虎”新的形象表达.FENG CHEN WANG通过传统工艺制作出独一无二的虎纹印记,CHENG CHENG将中国非物质文化与当代先锋设计理念相结合...
[期刊论文] 作者:Jessica Brown,耿凌楠, 来源:英语文摘 年份:2022
我们中的许多人很幸运,能够在吃什么的问题上拥有一定的选择权.当我们打开冰箱或浏览当地超市的货架时,摆在我们面前的选项是五花八门的.但是,我们围绕自己的饮食做决定时是否像我们自以为的那样自由?倘若除了我们自身的饥饿感和恰好出现在我们眼前的选项外,还......
[期刊论文] 作者:王颖, 褚文秀, 来源:语言教育 年份:2022
Data Collection Research Methods in Applied Linguistics是由著名应用语言学学者Heath Rose,Jim MicKinley和Jessica Briggs...
[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:Hai-Yang Cheng, 来源:科学通报(英文版) 年份:2022
For ground-state singly charmed baryons,the Λ+c,Ξ+c and Ξ0c form an antitriplet representation and they all decay weakly.TheΩ0c,Ξ1+c,Ξ1+c and ∑++,+,0c form a sextet representation;among them,only Ω0c decays weakly....
[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....
[期刊论文] 作者:Hui-Ming Cheng, 来源:国家科学评论(英文版) 年份:2022
Voids are an essential scientific issue when it comes to traditional composite materials,because they greatly de-grade the latter\'s properties and usually cause catastrophic failure [1].Many characterization methods,such as mi-croscale X-r......
[期刊论文] 作者:Jianchun Cheng, 来源:中国科学:物理学 力学 天文学(英文版) 年份:2022
Ultrasonic waves,although not audible,naturally exist at high frequencies.Ultrasound can be controlled and unitized in various scenarios.Well-known examples are bats and dolphins,which produce ultrasound and detect the reflected signal for ......
[期刊论文] 作者:黄雄俊,刘君成,温鑫鸿,游巍斌,巫丽芸,刘进山,蔡昌棠,何东进, 来源:植物资源与环境学报 年份:2022
Cheng) Hu ex C. N....
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