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| 1 | Towards 6G wireless communication networks:vision,enabling technologies,and new paradigm shifts显示文摘The fifth generation(5G)wireless communication networks are being deployed worldwide from 2020 and more capabilities are in the process of being standardized,such as mass connectivity,ultra-reliability,and guaranteed low latency.However,5G will not meet all requirements of the future in 2030 and beyond,and sixth generation(6G)wireless communication networks are expected to provide global coverage,enhanced spectral/energy/cost efficiency,better intelligence level and security,etc.To meet these requirements,6G networks will rely on new enabling technologies,i.e.,air interface and transmission technologies and novel network architecture,such as waveform design,multiple access,channel coding schemes,multi-antenna technologies,network slicing,cell-free architecture,and cloud/fog/edge computing.Our vision on 6G is that it will have four new paradigm shifts.First,to satisfy the requirement of global coverage,6G will not be limited to terrestrial communication networks,which will need to be complemented with non-terrestrial networks such as satellite and unmanned aerial vehicle(UAV)communication networks,thus achieving a space-airground-sea integrated communication network.Second,all spectra will be fully explored to further increase data rates and connection density,including the sub-6GHz,millimeter wave(mmWave),terahertz(THz),and optical frequency bands.Third,facing the big datasets generated by the use of extremely heterogeneous networks,diverse communication scenarios,large numbers of antennas,wide bandwidths,and new service requirements,6G networks will enable a new range of smart applications with the aid of artificial intelligence(AI)and big data technologies.Fourth,network security will have to be strengthened when developing 6G networks.This article provides a comprehensive survey of recent advances and future trends in these four aspects.Clearly,6G with additional technical requirements beyond those of 5G will enable faster and further communications to the extent that the boundary between physical and cyber worlds disappears. | Xiaohu YOU Cheng-Xiang WANG Jie HUANG Xiqi GAO Zaichen ZHANG Mao WANG Yongming HUANG Chuan ZHANG Yanxiang JIANG Jiaheng WANG Min ZHU Bin SHENG Dongming WANG Zhiwen PAN Pengcheng ZHU Yang YANG Zening LIU Ping ZHANG Xiaofeng TAO Shaoqian LI Zhi CHEN Xinying MA Chih-Lin I Shuangfeng HAN Ke LI Chengkang PAN Zhimin ZHENG Lajos HANZO Xuemin(Sherman)SHEN Yingjie Jay GUO Zhiguo DING Harald HAAS Wen TONG Peiying ZHU Ganghua YANG Jun WANG Erik GLARSSON Hien Quoc NGO Wei HONG Haiming WANG Debin HOU Jixin CHEN Zhe CHEN Zhangcheng HAO Geoffrey Ye LI Rahim TAFAZOLLI Yue GAO HVincent POOR Gerhard P.FETTWEIS Ying-Chang LIANG | 2021 | Science China(Information Sciences)2021，64，1： | 122 |
| 2 | Kirigami-inspired,highly stretchable microsupercapacitor patches fabricated by laser conversion and cutting显示文摘The recent developments in material sciences and rational structural designs have advanced the field of compliant and deformable electronics systems.However,many of these systems are limited in either overall stretchability or areal coverage of functional components.Here,we design a construct inspired by Kirigami for highly deformable microsupercapacitor patches with high areal coverages of electrode and electrolyte materials.These patches can be fabricated in simple and efficient steps by laser-assisted graphitic conversion and cutting.Because the Kirigami cuts significantly increase structural compliance,segments in the patches can buckle,rotate,bend and twist to accommodate large overall deformations with only a small strain(<3%)in active electrode areas.Electrochemical testing results have proved that electrical and electrochemical performances are preserved under large deformation,with less than 2%change in capacitance when the patch is elongated to 382.5%of its initial length.The high design flexibility can enable various types of electrical connections among an array of supercapacitors residing in one patch,by using different Kirigami designs. | Renxiao Xu Anton Zverev Aaron Hung Caiwei Shen Lauren Irie Geoffrey Ding Michael Whitmeyer Liangjie Ren Brandon Griffin Jack Melcher Lily Zheng Xining Zang Mohan Sanghadasa Liwei Lin | 2018 | Microsystems & Nanoengineering2018，4，1： | 6 |
| 3 | Efficient fixation of CO_(2) into propylene carbonate with [BMIM]Br in a continuous-flow microreaction system显示文摘Utilization of carbon dioxide(CO_(2)) is of great significance in the development of CO_(2) absorption and the solution of greenhouse gas effect.Highly efficient conversion of CO_(2) into cyclic carbonate with green catalysts is essential for the more sustainable expansion of CO_(2) fixation.Traditional batch reactor is limited by low efficiency, high cost and low security. Meanwhile, continuous flow system showcased a myriad of virtues, including shortening the residence time from hours to seconds, and decreasing reaction temperature, and possessing the nature of easy industrial scale-up. In this paper, a continuous-flow microreaction system was developed to synthesis propylene carbonate(PC) from propylene oxide(PO) and CO_(2) using 1-butyl-3-methylimidazolium bromide([BMIM]Br) as catalyst. By observing the flow patterns inside microreaction system, the effects of reaction temperature, molar fraction of catalyst, operating pressure, residence time, molar ratio of CO_(2)/PO as well as recycling performance of catalyst on the overall performances were comprehensively evaluated into details. Under different reaction conditions,the flow patterns were set to vary between slug flow and annular flow. The results showed that the yield of propylene carbonate(PC) can reach99.7% at 140℃ and 3.0 MPa with the residence time of 166 s, while the recycling performance of the designed system greatly conforms the future trend of green chemistry. | Yuxin Wu Yuncheng Ding Jianhong Xu Yundong Wang Kathryn Mumford Geoffrey WStevens Weiyang Fei | 2021 | Green Energy & Environment2021，6，2： | 3 |
| 4 | Sequencing a mouse acute promyelocytic leukemia genome reveals genetic events relevant for disease progression显示文摘 | Wartman Lukas D Larson David E Xiang Zhifu Ding Li Chen Ken Lin Ling Cahan Patrick Klco Jeffery M Welch John S Li Cheng Payton Jacqueline E Uy Geoffrey L Varghese Nobish Ries Rhonda E Hoock Mieke Koboldt Daniel C McLellan Michael D Schmid | 2011 | Journal of Clinical Investigation2011，，： | 1 |
| 5 | 功率超声波对于制革加工的影响 第2部分:加脂显示文摘将功率超声波(38kHz、1.36W/cm^2)用于加脂剂乳液的制备以及加脂工艺。研究发现存在超声波时制备的加脂剂乳液的粒子尺寸减小15%。在常规加脂工艺中应用这种细小的乳液能够明显增加加脂革油含量(可达36%).并促进加脂剂的渗透及其在革内的均匀分布。油脂含量的增加主要集中在中间层和粒面层。在促进加脂过程方面,超声波作用不如机械搅拌作用有效,但是将超声波作用与机械搅拌作用联合使用能够产生协同效应,增加油脂含量20%~40%,并促进加脂剂渗透及其在革内的均匀分布。可以发现最好在加脂工序后期应用超声波,并且存在最大化超声波作用的最佳温度。另外,油脂分布的分析表明超声波加脂对于增加革肉面油脂含量特别有效。这些结果显示在加脂剂粒子尺寸比可用路径尺寸相对更小时,超声波对于加速加脂过程是有效的。 | Jian-Ping Xie Ji-Feng Ding Geoffrey E. Attenburrow Timothy J. Mason 龚英(译) | 2009 | 北京皮革(中外鞋讯)(下)2009，，8： | 0 |
| 6 | Three-dimensional niche partitioning between two colonially nesting ardeid species in central China显示文摘Background:Interspecific competition is known to be strongest between those species that are both closely related and sympatric.Egrets are colonially nesting wetland birds that often overlap and can therefore be expected to compete in roosting and nesting habitat as well as in diet.According to the niche partitioning hypothesis,it is to be expected that these similar species would show differentiation in at least one of the main niche dimensions to reduce competition.We tested niche partitioning between the colonially nesting Little Egret(Egretta garzetta)and Cattle Egret(Bubulcus ibis)in temporal,spatial and trophic dimensions.Methods:Field study was conducted in three mixed egret colonies in Yangxian County,southwest Shaanxi Prov-ince,central China.For each nest colony we recorded its spatial location,the height of nesting trees and of nests,the height of roosting trees and of roosting individuals within the trees.We determined the first egg-laying and first hatching dates of the two species.Craw dissection of storm-killed egret nestlings was used to measure the diet.Six transects were surveyed to study foraging habitat selection.Results:We found that hatching time of Little Egrets peaked earlier(by about 1 month)than that of Cattle Egrets.Cattle Egrets nested and roosted higher than Little Egrets.The foraging habitats used by Little Egrets were dominated by river banks(73.49%),followed by paddy fields(13.25%)and reservoirs(10.84%),whereas Cattle Egret foraging sites were characterized by grasslands(44.44%),paddy fields(33.33%)and river banks(22.22%).Little Egrets consumed more fishes(65.66%)and Odonata larvae(13.69%)than Cattle Egrets,while Cattle Egrets were found feeding mainly on Coleoptera(29.69%)and Orthoptera(23.29%).Little Egrets preyed on larger mean biomasses of food items than Cattle Egrets.Conclusions:Our results confirm the niche partitioning hypothesis as a mechanism for coexistence among ecologi-cally similar species.In two coexisting egret species,niche partitioning is multidimensional,such that the two coexist-ent species occupy differing ecological space based on all three temporal,spatial and trophic niche dimensions. | Yuanxing Ye Canshi Hu Yiting Jiang Geoffrey W.H.Davison Changqing Ding | 2021 | Avian Research2021，12，3： | 0 |
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