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28篇 您的检索式:作者名="Daquan Li"
    题名 作者 年代 出处 被引量
1Performance analysis and comparison of PoW,PoS and DAG based blockchains显示文摘In the blockchain,the consensus mechanism plays a key role in maintaining the security and legitimation of contents recorded in the blocks.Various blockchain consensus mechanisms have been proposed.However,there is no technical analysis and comparison as a guideline to determine which type of consensus mechanism should be adopted in a specific scenario/application.To this end,this work investigates three mainstream consensus mechanisms in the blockchain,namely,Proof of Work(PoW),Proof of Stake(PoS),and Direct Acyclic Graph(DAG),and identifies their performances in terms of the average time to generate a new block,the confirmation delay,the Transaction Per Second(TPS)and the confirmation failure probability.The results show that the consensus process is affected by both network resource(computation power/coin age,buffer size)and network load conditions.In addition,it shows that PoW and PoS are more sensitive to the change of network resource while DAG is more sensitive to network load conditions.Bin Cao Zhenghui Zhang Daquan Feng Shengli Zhang Lei Zhang Mugen Peng Yun Li 2020Digital Communications and Networks2020,6,4:15
2Effects of Ho on the microstructure and mechanical properties of Mg-Zn-Ho-Zr magnesium alloys显示文摘The microstructure and mechanical properties of Mg-Zn-Ho-Zr alloys have been investigated in detail.The grain size of the as-cast Mg-Zn-Ho-Zr alloy was greatly decreased by the addition of Ho,and the grain growth during solution treatment was suppressed by Mg-Zn-Ho phases formed at grain boundaries.These thermally stable Mg-Zn-Ho phases could not completely dissolve into the matrix during solution treatment,and the strengthening effect of solution-plus-ageing treatment weakened.The addition of Ho can greatly enhance the high-temperature elongation of the Mg-Zn-Ho-Zr alloy,but the increase of high-temperature tensile strength was just a little.LI Daquan WANG Qudong DING Wenjiang 2011Rare Metals2011,30,2:8
3Synthesis of gold/rare-earth-vanadate core/shell nanorods for integrating plasmon resonance and fluorescence显示文摘nanoscale 核心 / 壳 heterostructure 是一个特别地有效的主题联合 plasmonic 材料和稀土元素的混合物的有希望的性质;然而,在那里由于在这二内在地无敌的材料之间的大界面的精力在合成控制仍然是重要挑战。此处,我们报导种 rare-earth-vanadate 的一条合成线路在金 nanorod (AuNR ) 上轰炸核心。在通过表面活化剂交换与油酸盐修改 AuNR 表面以后,包装得好的稀土元素的氧化物(例如, Gd 2 O 3:Eu) 壳由于油酸盐的多重角色在 AuNRs 上被种。而且,壳的作文从氧化物被改变了到 vanadate (用一个阴离子交换方法的 GdVO 4:Eu) 。由于小心地设计的策略, AuNR 核心在合成过程期间维持形态学;因此,最后的 Au/GdVO 4:Eu 核心 / 壳 NR 展出强壮的吸收乐队和高 photothermal 效率。另外, Au/GdVO 4:Eu NR 象 ~ 一样高与量产量展出明亮的 Eu 3+ 荧光 17% ;明亮的 Sm 3+ 和 Dy 3+ 荧光能被改变在氧化物形成做的 lanthanide 也获得。由于 plasmonic 和荧光性质的吸引人的集成,如此的核心 / 壳 heterostructures 将在区域的一个宽数组发现特别应用,从 biomedicine 到精力。Jiahong Wang Hao Huang Daquan Zhang Ming Chen Yafang Zhang Xuefeng Yu Li Zhou Ququan wang 2015Nano Research2015,8,8:4
4Identification of Sheep Ovary Genes Potentially Associated with Off-season Reproduction显示文摘Off-season reproduction is a favorable economic trait for sheep industry.Hu sheep,an indigenous Chinese sheep breed,demonstrates a higher productivity of lambs and displays year-around oestrous behavior under proper nutrition and environment.The genetic basis behind these traits,however,is not well understood.In order to identify genes associated with the off-season reproduction,we constructed a suppression subtractive hybridization(SSH) cDNA library using pooled ovary mRNAs of 6 oestrous Hu females as a tester and the pooled ovary mRNAs of 6 non-oestrous Chinese Merino females as a driver.A total of 382 resulting positive clones were obtained after the SSH.We identified 114 differentially up-regulated genes in oestrous Hu sheep by using subsequent screening and DNA sequencing,of which 8 were previously known,93 were reported for the first time in sheep,and 13 were novel with no significant homology to any sequence in the DNA databases.Functions of the genes identified are related to cell division,signal transduction,structure,metabolism,or cell defense.To validate the results of SSH,6 genes(Ntrk2,Ppap2b,Htra1,Nid1,Serpine2 and Foxola) were selected for conformational analysis using quantitative real-time PCR(qRT-PCR),and two of them(Htral and Foxola) were verified by Northern blot.All of the 6 genes were differentially up-regulated in the ovary of oestrous Hu.It is obvious that off-season reproduction is a complex trait involving multiple genes in multiple organs.This study helps to provide a foundation for the final identification of functional genes involved in the sheep ovary.Lei Chen Ka Liu Zongsheng Zhao Hugh T.Blair Peng Zhang Daquan Li Runlin Z.Ma 2012Journal of Genetics and Genomics2012,39,4:3
5青海河湟谷地胃癌病理特征及其变化趋势分析(英文)显示文摘Objective: The aim of our study was to discuss changes in the clinicopathological characteristics of gastric cancer in Hehuang Valley of China in recent 10 years. Methods: A retrospective case-control study was performed on 2379 newly-diagnosed gastric cancer patients. All of them came from Hehuang Valley. The patients were divided into two groups [recent 5 years(R5Y) and late 5 years(L5Y)] from February 2003 to February 2013, and the clinicopathological data were surveyed retrospectively. Results: The constituent ratio of upper 1/3 gastric cancer in R5Y and L5Y was 33.5% and 20.7%, respectively, and it showed a significant difference between the two groups(χ2 = 21.28, P = 0.00). The constituent ratio of squamous carcinoma/adenosquamous carcinoma was 2.7% and 1.6%, respectively, and it also showed a significant difference between two groups(χ2 = 50.91, P = 0.00). The constituent ratio of moderately-poorly differentiated/poorly differentiated gastric carcinoma was 84.2% and 50.2%, respectively, and it showed statistically significant difference(χ2 = 30.28, P = 0.00). The detection rate of early gastric cancer(EGC) was 1.47%(35/2379). The constituent ratio of the types of Borrmann II and Borrmann IV of advanced gastric cancer(AGC) among 2379 cases was 47.6% and 40.8%, respectively, and that still showed statistically significant difference(χ2 = 18.80, P = 0.00). The constituent ratio of diffuse-type of gastric cancer in R5Y and L5Y was 36.2% and 30.8%, respectively, even there was a significant difference(χ2 = 7.49, P = 0.01). Furthermore, there were also significant differences in regional lymph nodes metastasis, perineural infiltration and vascular invasion(P < 0.05). The positive detection rate of HER2, ER and PR was 14.88%, 17.23% and 15.93%, respectively. The constituent ratio of HP in two groups was 43.8% and 36.2% respectively, and it also showed a significant difference(χ2 = 13.51, P = 0.00). Conclusion: The pathogenic sites in gastric cancer change to the upper stomach in Hehuang Valley in recent 10 years, and the detection rate of squamous carcinoma/adenosquamous carcinoma reveals a sharp rise. Borrmann III is still one of the main types of advanced gastric cancer, but the detection rates of Borrmann II and IV are increasing. The main type of gastric cancer is the intestinaltype, but the ratio of diffuse-type is also increasing in recent 10 years. The HP detection rate is 40.65%(967/2379), and it has a slight rise in recent 10 years. The detection rate of poorly differentiated adenocarcinoma is increasing despite the fact that the moderately/moderately-poorly differentiated adenocarcinoma is the main histologic types. High detection rates of lymph nodes metastasis, perineural infiltration and vascular invasion indicate poor prognosis in patients with gastric cancer. There is no change in HER2 positive rate, on the contrary, there are a little increase in ER and PR expression in Hehuang Valley.Su Yan Bin Li Junqi Wu Dawei Xie Yingcai Ma Yuanzhi Xiong Xuxiang Ma Xinjian Guo Man Dai Daquan Zhang Xinyang Liu 2014The Chinese-German Journal of Clinical Oncology2014,13,2:2
6Photoic crystal nanobeam cavity devices for on-chip integrated silicon photonics显示文摘Integrated circuit(IC)industry has fully considered the fact that the Moore’s Law is slowing down or ending.Alternative solutions are highly and urgently desired to break the physical size limits in the More-than-Moore era.Integrated silicon photonics technology exhibits distinguished potential to achieve faster operation speed,less power dissipation,and lower cost in IC industry,because their COMS compatibility,fast response,and high monolithic integration capability.Particularly,compared with other on-chip resonators(e.g.microrings,2D photonic crystal cavities)silicon-on-insulator(SOI)-based photonic crystal nanobeam cavity(PCNC)has emerged as a promising platform for on-chip integration,due to their attractive properties of ultra-high Q/V,ultra-compact footprints and convenient integration with silicon bus-waveguides.In this paper,we present a comprehensive review on recent progress of on-chip PCNC devices for lasing,modulation,switching/filting and label-free sensing,etc.Daquan Yang Xiao Liu Xiaogang Li Bing Duan Aiqiang Wang Yunfeng Xiao 2021Journal of Semiconductors2021,42,2:2
7A murine model for human immune thrombocytopenic purpura and comparative analysis of multiple gene expression in bone marrow and spleen显示文摘Homeostasis of platelet number in human and other mammals is well maintained for prevention of minor bleeding and for other immunological functions,but the exact molecular mechanism responsible for immune thrombocytopenic purpura(ITP) has not been fully understood.In an effort to identify genetic factors involved in initiation of platelet production in response to bleeding injury or platelet destruction,we have successfully generated an animal model of human ITP via intraperitoneal injection of anti-platelet antibody into the Balb/c mouse.Platelet counts were dropped dramatically in animals that received antibody injection within 4 h,maintained at the mini-mum level for a period of 44 h,started to rebound after 48 h,and reached to the maximum at 144 h(6 days).Final homeostasis reached at approximately 408 h(17 days),following a minor cycle of platelet number fluctuation.Using semi-quantitative RT-PCR,we assessed and compared mRNA level of CD41,c-myb,c-mpl,caspase-3,caspase-9,GATA-1,and Bcl-xl in bone marrow and spleen.Alteration of mRNA expression was correlated with the change of platelet level,and an inverse relationship was found for expression of the genes between bone marrow and spleen.No transcription was detectable for any of the seven genes in bone marrow at the time when platelet number reached the maximum(144 h).In contrast,mRNA transcripts of the seven genes were found to be at the highest level in spleen tissue.This is the first study of simultaneous detection of multiple platelet related genes in a highly reproducible ITP animal model.Our results provided the supportive evidence that expression of the above seven genes are more related to negative regulation of platelet number in spleen tissue,at least in the model animals.Hong Wei Xinchun Ding Jiangong Ren Ka Liu Pingping Tan Daquan Li Runlin Z. Ma 2008Journal of Genetics and Genomics2008,35,11:2
8Imidazolium‐Based Organic–Inorganic Hybrid Silica as a Functional Platform Dramatically Boosts Chiral Organometallics Performance in Asymmetric Catalysis显示文摘Daquan Xia Tanyu Cheng Wei Xiao Ketang Liu Zhaoliang Wang Guohua Liu Hexing Li Wei Wang 2013ChemCatChem2013,,7:1
9In vivo evaluation of novel chitosan graft polymeric micelles for delivery of paclitaxel 显示文摘Jia Liu Hongxia Li Daquan Chen 2011Drug Delivery2011,18,3:1
10Corrosion properties of Nd:YAG laser GMA hybrid weld AA6061 Al alloy and its microstructure显示文摘ZHANG DAQUAN LI JIN HYUNG GOUN JOO 2009Corrosion Science2009,51,6:1
11The seismicity and seismic structure in the seismic risk region from Xinyi to Sixian显示文摘Yao Daquan Liu Jiacan Li Jie 2003North China Earthquake Science2003,21,2:1
12Coherent and incoherent combining of fiber array with hexagonal ring distribution 显示文摘Li Yongzhong Qian Liejia Ial Daquan 2009Optical Fiber Technology2009,15,:1
13Effects of heat treatments on Microstructure and mechanical properties of Mg–4Y–4Sm–0.5Zr alloy显示文摘Daquan Li Qudong Wang Wenjiang Ding 2006Materials Science & Engineering A2006,,1:1
14Microscopic textures in rocks deformed by chemical explosion and experimental stick-slip as a guide to condition of palaeoseismicity显示文摘Yao Daquan Chu Yucheng Li Xuezheng 2000Journal of Asian Earth Sciences2000,18,5:1
15Microscopic Indicators of Stick-Slip and Creep-Slip in Deformation Products From the Daqingshan Piedmont Active Fault显示文摘Through the collection of oriented samples,consolidation of undisturbed samples,and systematic microscopy of thin sections,the deformation products from the Daqingshan piedmont active fault zone have been studied.The obtained results have been analyzed in combination with those of rock fracture experiments and macroscopic surveys.Based on the above,the present article summarizes the microscopic indicators of stick-slip and creep-slip,which reflect the characteristics of fault movement,and has given some suggestion on relevant problems.Yao Daquan,Tang Youbiao,Li Jie,and Liu JiacanSeismological Bureau of Anhui Province,Hefei 230031,China 1996Earthquake Research in China1996,10,1:1
16Prognostic value of K-RAS mutations in patients with non-small cell lung cancer: A systematic review with meta-analysis显示文摘Daquan Meng Mingli Yuan Xiaojuan Li Lijun Chen Jie Yang Xin Zhao Wanli Ma Jianbao Xin 2013Lung Cancer2013,,1:1
17Prognostic value of K-RAS mutations in patients with non-small cell lung cancer: A systematic review with meta-analysis显示文摘Daquan Meng Mingli Yuan Xiaojuan Li Lijun Chen Jie Yang Xin Zhao Wanli Ma Jianbao Xin 2013Lung Cancer2013,,1:1
18Coherent and incoherent combining of fiber array with hexagonal ring distribution 显示文摘Yongzhong Li Liejia Qian Daquan Lu 2007Opticsand Laser Tech2007,39,:1
19Discovery of the Natural Deformation Vestige of Gaixia Remains,Guzhen County,Anhui Province,China and Its Implications显示文摘Recognition of natural deformation during the excavation of ancient remains and tombs is important for tracing or enriching historic and prehistoric deformation records. Recently, the earthquake agencies,in cooperation with the cultural relics and archaeological institutions, conducted a special excavation investigation to the Gaixia remains archaeological scene in Guzhen,Anhui Province. Faults and fissures were discovered there, which,as demonstrated by the preliminary study,are the traces of two stratum dislocation events of the same period,at a time approximately corresponding to the late Dawenkou culture stage. This work may improve the recognition of earthquake relics in the cultural stratum of humanity in the East China region.Yao Daquan Shuo Zhi Tang Jieping Wang Zhi Shen Xiaoqi Chen Anguo Li Linli 2011Earthquake Research in China2011,25,1:0
20Multimode sensing based on optical microcavities显示文摘Optical microcavities have the ability to confne photons in small mode volumes for long periods of time,greatly enhancing light-matter interactions,and have become one of the research hotspots in international academia.In recent years,sensing applications in complex environments have inspired the development of multimode optical microcavity sensors.These multimode sensors can be used not only for multi-parameter detection but also to improve measurement precision.In this review,we introduce multimode sensing methods based on optical microcavities and present an overview of the multimode single/multi-parameter optical microcavities sensors.Expected further research activities are also put forward.Yanran Wu Bing Duan Changhong Li Daquan Yang 2023Frontiers of Optoelectronics2023,16,3:0
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