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208篇 您的检索式:作者名="Yiwei Wang"
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1Ythdc2 is an N^6-methyladenosine binding protein that regulates mammalian spermatogenesis显示文摘N 6-methyladenosine (m 6 一) 是在真核细胞的 mRNA 的最普通的内部修正。它动态地被安装并且搬迁,并且充当 mRNA 新陈代谢,包括干细胞 pluripotency 的调整生物过程,房间区别,和精力动态平衡的新层。m 6 A 被选择有约束力的蛋白质认出;YTHDF1 和 YTHDF3 在音乐会工作影响 m 6包含 A 的 mRNAs, YTHDF2 帮助 mRNA 腐烂,和 YTHDC1 影响它的目标的原子处理。YTHDC2 的生物功能, YTH 蛋白质家庭,的最后的成员仍然保持未知。我们报导 YTHDC2 有选择地绑 m 6 在它的一致主题的 A。YTHDC2 提高它的目标的翻译效率并且也减少他们的 mRNA 丰富。Ythdc2 猛烈老鼠是不肥沃的;男性们让显著地更小的睾丸和女性同窝出生的人与那些相比有显著地更小的卵巢。Ythdc2 猛烈老鼠的细菌房间不经过 zygotene 阶段发展,因此,当成熟分裂开始, Ythdc2 是在睾丸的 upregulated。因此, YTHDC2 是 m 6 在精子发生期间起关键作用的 A 绑定蛋白质。Phillip J Hsu Yunfei Zhu Honghui Ma Yueshuai Guo Xiaodan Shi Yuanyuan Liu Meijie Qi Zhike Lu Hailing Shi Jianying Wang Yiwei Cheng Guanzheng Luo Qing Dai Mingxi Liu Xuejiang Guo Jiahao Sha Bin Shen Chuan He 2017Cell Research2017,27,9:96
2Flavonoid profiling of a traditional Chinese medicine formula of Huangqin Tang using high performance liquid chromatography显示文摘The quality control processes for herbal medicines have been problematic. Flavonoids are the major active components of Huangqin Tang(HQT, a traditional Chinese medicine formula). In this study, we used a combinative method approach consisting of chromatographic fingerprinting(high performance liquid chromatography; HPLC), quantitative methods and a pharmacodynamic evaluation model to analyze the flavonoids of HQT obtained from different sources. Ten batches of HQT were analyzed by the HPLC fingerprinting method and 26 common peaks were detected, of which 23 peaks corresponded with the chemical profile of HQT. In addition, 11 major compounds were identified by LC–MS analysis(liquid chromatography–tandem mass spectrometer; LC–MS^n) and quantified by the HPLC quantitative method approach. The studied10 batches of HQT were found to be homogeneous in their composition with a similarity between 0.990 and1.000. The distribution of the 11 identified compounds was found to be very similar among the batches. Only slight pharmacodynamic differences were detected between the different batches, confirming the homogeneity of HQT. The results of this study prove that the combination of chromatographic fingerprinting and quantitative analysis can be readily used for comprehensive quality control of herbal medicines.Tao Li Shuaixing Zhuang Yiwei Wang Yanli Wang Weihao Wang Huihui Zhang Li Chen Dunfang Wang Zhongming Zhou Weipeng Yang 2016Acta Pharmaceutica Sinica B2016,6,2:19
3From concept to reality-A review to the primary test stand and its preliminary application in high energy density physics显示文摘Pulsed power technology,whereas the electrical energy stored in a relative long period is released in much shorter timescale,is an efficient method to create high energy density physics(HEDP)conditions in laboratory.Around the beginning of this century,China Academy of Engineering Physics(CAEP)began to build some experimental facilities for HEDP investigations,among which the Primary Test Stand(PTS),a multi-module pulsed power facility with a nominal current of 10 MA and a current rising time~90 ns,is an important achievement on the roadmap of the electro-magnetically driven inertial confinement fusion(ICF)researches.PTS is the first pulsed power facility beyond 10 TW in China.Therefore,all the technologies have to be demonstrated,and all the engineering issues have to be overcome.In this article,the research outline,key technologies and the preliminary HEDP experiments are reviewed.Prospects on HEDP research on PTS and pulsed power development for the next step are also discussed.Jianjun Deng Weiping Xie Shuping Feng Meng Wang Hongtao Li Shengyi Song Minghe Xia Ji Ce An He Qing Tian Yuanchao Gu Yongchao Guan Bin Wei Xianbin Huang Xiaodong Ren Jiakun Dan Jing Li Shaotong Zhou Hongchun Cai Siqun Zhang Kunlun Wang Qiang Xu Yujuan Wang Zhaohui Zhang Guilin Wang Shuai Guo Yi He Yiwei Zhou Zhanji Zhang Libing Yang Wenkang Zou 2016Matter and Radiation at Extremes2016,1,1:19
4Small molecule inhibitors reveal allosteric regulation of USP14 via steric blockade显示文摘The ubiquitin system is important for drug discovery,and the discovery of selective small-molecule inhibitors of deubiquitinating enzymes (DUBs) remains an active yet extremely challenging task. With a few exceptions,previously developed inhibitors have been found to bind the evolutionarily conserved catalytic centers of DUBs,resulting in poor selectivity. The small molecule IU1 was the first-ever specific inhibitor identified and exhibited surprisingly excellent selectivity for USP14 over other DUBs. However,the molecular mechanism for this selectivity was elusive. Herein,we report the high-resolution co-crystal structures of the catalytic domain of USP14 bound to IU1 and three IU1 derivatives. All the structures of these complexes indicate that IU1 and its analogs bind to a previously unknown steric binding site in USP14,thus blocking the access of the C-terminus of ubiquitin to the active site of USP14 and abrogating USP14 activity. Importantly,this steric site in USP14 is very unique,as suggested by structural alignments of USP14 with several known DUB X-ray structures. These results,in conjunction with biochemical characterization,Indicate a coherent steric blockade mechanism for U5P14 inhibition by compounds of the IU series. In light of the recent report of steric blockade of USP7 by FT671,this work suggests a potential generally applicable allosteric mechanism for the regulation of DUBs via steric blockade,as showcased by our discovery of IU1-248 which is 10-fold more potent than IU1.Yiwei Wang Yuxuan Jiang Shan Ding Jiawang Li Ningjing Song Yujing Ren Danning Hong Cai Wu Bin Li Feng Wang Wei He Jiawei Wang Ziqing Mei 2018Cell Research2018,28,12:15
5Generation of a precise Oct4-hrGFP knockin cynomolgus monkey model via CRISPR/Cas9-assisted homologous recombination显示文摘Yiqiang Cui Yuyu Niu Jiankui Zhou Yongchang Chen Yiwei Cheng Shangang Li Zongyong Ai Chu Chu Hong Wang Bo Zheng Xuejin Chen Jiahao Sha Xuejiang Guo Xingxu Huang Weizhi Ji 2018Cell Research2018,28,3:13
6Relevant experience learning:A deep reinforcement learning method for UAV autonomous motion planning in complex unknown environments显示文摘Unmanned Aerial Vehicles(UAVs)play a vital role in military warfare.In a variety of battlefield mission scenarios,UAVs are required to safely fly to designated locations without human intervention.Therefore,finding a suitable method to solve the UAV Autonomous Motion Planning(AMP)problem can improve the success rate of UAV missions to a certain extent.In recent years,many studies have used Deep Reinforcement Learning(DRL)methods to address the AMP problem and have achieved good results.From the perspective of sampling,this paper designs a sampling method with double-screening,combines it with the Deep Deterministic Policy Gradient(DDPG)algorithm,and proposes the Relevant Experience Learning-DDPG(REL-DDPG)algorithm.The REL-DDPG algorithm uses a Prioritized Experience Replay(PER)mechanism to break the correlation of continuous experiences in the experience pool,finds the experiences most similar to the current state to learn according to the theory in human education,and expands the influence of the learning process on action selection at the current state.All experiments are applied in a complex unknown simulation environment constructed based on the parameters of a real UAV.The training experiments show that REL-DDPG improves the convergence speed and the convergence result compared to the state-of-the-art DDPG algorithm,while the testing experiments show the applicability of the algorithm and investigate the performance under different parameter conditions.Zijian HU Xiaoguang GAO Kaifang WAN Yiwei ZHAI Qianglong WANG 2021Chinese Journal of Aeronautics2021,34,12:10
7Deformation behavior of non-rigid airships in wind tunnel tests显示文摘Deformation behavior of non-rigid airships in wind tunnel tests is studied by considering three factors, including internal pressure, flow velocity and angle of attack. Fiber Bragg grating strain sensors are used to measure the deformation of non-rigid airships. Wind tunnel tests in the case of different flow velocities and angles of attack are conducted. The measurement results reveal that the airship deformation is in proportion to internal pressure. For the tensile region,the airship deformation is in proportion to flow velocity. Effects of angle of attack on structural deformation are more complicated and there is no clear relationship existing between airship deformation and angle of attack.Lingling LU Hongwei SONG Yiwei WANG Chenguang HUANG 2019Chinese Journal of Aeronautics2019,32,3:9
8In vitro inhibitory and pro-apoptotic effect of Stellera Chamaejasme LExtract on human lung cancer cell line NCI-H157显示文摘OBJECTIVE:To investigate the inhibitory and pro-apoptotic effect of Stellera Chamaejasme L extract(ESC) in vitro.METHODS:ESC was first extracted with ethanol,and then washed using a polyamide column with 60% ethanol.ESC was then decompressively recycled and vacuum dried at room temperature to obtain active fractions.Subsequently,the cytotoxic and apoptotic effects of ESC on NCI-H157 human lung cancer cells were determined.RESULTS:The results showed that ESC was rich in isomers of Chamaejasminor,neochamaejasmine and Sikokianin.ESC had significant cytotoxicity against NCI-H157 cells,with an IC 50 of approximately 18.50 μg.mL-1.ESC caused significant increase in total apoptotic rate,the activity of caspase 3 and 8,and Fas protein expression(P<0.05).CONCLUSION:The inhibitory effect of ESC on NCI-H157 tumor cells might partly be attributed to its apoptotic induction through activation of the Fas death receptor pathway.Xiaoni Liu Yujie Li Qing Yang Ying Chen Xiaogang Weng Yiwei Wang Ning Li Xiaoxin Zhu 2012Journal of Traditional Chinese Medicine2012,32,3:8
9Abnormal expression of bHLH3 disrupts a flavonoid homeostasis network,causing differences in pigment composition among mulberry fruits显示文摘Mulberry fruits with high concentrations of anthocyanins are favored by consumers because of their good taste,bright color,and high nutritional value.However,neither the regulatory mechanism controlling flavonoid biosynthesis in mulberry nor the molecular basis of different mulberry fruit colors is fully understood.Here,we report that a flavonoid homeostasis network comprising activation and feedback regulation mechanisms determines mulberry fruit color.In vitro and in vivo assays showed that MYBA-bHLH3-TTG1 regulates the biosynthesis of anthocyanins,while TT2L1 and TT2L2 work with bHLH3 or GL3 and form a MYB-bHLH-WD40(MBW)complex with TTG1 to regulate proanthocyanidin(PA)synthesis.Functional and expression analyses showed that bHLH3 is a key regulator of the regulatory network controlling mulberry fruit coloration and that MYB4 is activated by MBW complexes and participates in negative feedback control of the regulatory network to balance the accumulation of anthocyanins and proanthocyanidins.Our research demonstrates that the interaction between bHLH3 and MYB4 in the homeostasis regulatory network ensures that the fruits accumulate desirable flavonoids and that this network is stable in pigmentrich mulberry fruits.However,the abnormal expression of bHLH3 disrupts the balance of the network and redirects flavonoid metabolic flux in pale-colored fruits,resulting in differences in the levels and proportions of anthocyanins,flavones,and flavonols among differently colored mulberry fruits(red,yellow,and white).The results of our study reveal the molecular basis of the diversity of mulberry fruit colors.Han Li Zhen Yang Qiwei Zeng Shibo Wang Yiwei Luo Yan Huang Youchao Xin Ningjia He 2020Horticulture Research2020,7,1:8
10Influence of tunnel length on the pressure wave generated by high-speed trains passing each other显示文摘The prediction of the pressure wave amplitude produced when two trains pass each other in the tunnel is important to the train design for airtightness and tunnel conditions in China.In this paper,the key factors of this problem were firstly stud-ied based on theoretical analysis.The equation of the worst tunnel length for the global maximum and minimum pressure values was derived.Then,the influence of tunnel length on global minimum pressure and the critical region in which the global minimum pressure varies rapidly were investigated.Finally,a numerical method based on two-dimensional Na-vier-Stokes equations was established.Typical conditions of two trains passing-by in tunnels of different lengths were simulated.The theoretical and computational results agree with each other closely.WANG YiWei YANG GuoWei HUANG ChengGuang WANG Wei 2012Science China(Technological Sciences)2012,55,1:7
11Ultrahigh-Q silicon racetrack resonators显示文摘An ultrahigh-Q silicon racetrack resonator is proposed and demonstrated with uniform multimode silicon photonic waveguides.It consists of two multimode straight waveguides connected by two multimode waveguide bends(MWBs).In particular,the MWBs are based on modified Euler curves,and a bent directional coupler is used to achieve the selective mode coupling for the fundamental mode and not exciting the higher-order mode in the racetrack.In this way,the fundamental mode is excited and propagates in the multimode racetrack resonator with ultralow loss and low intermode coupling.Meanwhile,it helps achieve a compact 180°bend to make a compact resonator with a maximized free spectral range(FSR).In this paper,for the chosen 1.6μm wide silicon photonic waveguide,the effective radius Reffof the designed 180°bend is as small as 29μm.The corresponding FSR is about 0.9 nm when choosing 260μm long straight waveguides in the racetrack.The present high-Q resonator is realized with a simple standard single-etching process provided by a multiproject wafer foundry.The fabricated device,which has a measured intrinsic Q-factor as high as 2.3×10~6,is the smallest silicon resonator with a>106Q-factor.LONG ZHANG LANLAN JIE MING ZHANG YI WANG YIWEI XIE YAOCHENG SHI DAOXIN DAI 2020Photonics Research2020,8,5:7
12Aerodynamic simulation of high-speed trains based on the Lattice Boltzmann Method (LBM)显示文摘Aerodynamic simulation of high-speed trains has been carried out by using Lattice Boltzmann Method (LBM). Non-simplified train model was used and the number of space grids reached tens of millions. All results under different working conditions reflected the actual situation.WANG YiWei WANG Yang AN YiRan CHEN YaoSong 2008Science China(Technological Sciences)2008,51,6:7
13The Chinese Hα Solar Explorer(CHASE) mission: An overview显示文摘The Chinese Hα Solar Explorer(CHASE), dubbed “Xihe”—Goddess of the Sun, was launched on October 14, 2021 as the first solar space mission of China National Space Administration(CNSA). The CHASE mission is designed to test a newly developed satellite platform and to acquire the spectroscopic observations in the Hα waveband. The Hα Imaging Spectrograph(HIS)is the scientific payload of the CHASE satellite. It consists of two observational modes: raster scanning mode and continuum imaging mode. The raster scanning mode obtains full-Sun or region-of-interest spectral images from 6559.7 to 6565.9 ? and from 6567.8 to 6570.6 ? with 0.024 ? pixel spectral resolution and 1 min temporal resolution. The continuum imaging mode obtains photospheric images in continuum around 6689 ? with the full width at half maximum of 13.4 ?. The CHASE mission will advance our understanding of the dynamics of solar activity in the photosphere and chromosphere. In this paper, we present an overview of the CHASE mission including the scientific objectives, HIS instrument overview, data calibration flow, and first results of on-orbit observations.Chuan Li Cheng Fang Zhen Li MingDe Ding PengFei Chen Ye Qiu Wei You Yuan Yuan MinJie An HongJiang Tao XianSheng Li Zhe Chen Qiang Liu Gui Mei Liang Yang Wei Zhang WeiQiang Cheng JianXin Chen ChangYa Chen Qiang Gu QingLong Huang MingXing Liu ChengShan Han HongWei Xin ChangZheng Chen YiWei Ni WenBo Wang ShiHao Rao HaiTang Li Xi Lu Wei Wang Jun Lin YiXian Jiang LingJie Meng Jian Zhao 2022Science China(Physics,Mechanics & Astronomy)2022,65,8:7
14A chaos-based image encryption algorithm using alternate structure显示文摘Combined with two chaotic maps, a novel alternate structure is applied to image cryptosystem. In proposed algorithm, a general cat-map is used for permutation and diffusion, as well as the OCML (one-way coupled map lattice), which is applied for substitution. These two methods are operated alternately in every round of encryption process, where two subkeys employed in different chaotic maps are generated through the masterkey spreading. Decryption has the same structure with the encryption algorithm, but the masterkey in each round should be reversely ordered in decryption. The cryptanalysis shows that the proposed algorithm bears good immunities to many forms of attacks. Moreover, the algorithm features high execution speed and compact program, which is suitable for various software and hardware applications.ZHANG Yiwei WANG YuMin SHEN XuBang 2007Science in China(Series F)2007,50,3:6
15Brief Introduction to a Unique Edible Bolete---Phlebopus portentosus in Southern China显示文摘Chunxia Zhang Mingxia He Jing Liu Xinjing Xu Yang Cao Feng Gao Yiwei Fang Wenbing Wang Yun Wang 2017Journal of Agricultural Science and Technology(B)2017,7,6:6
16Bacterial Particle Swarm Optimization显示文摘JI Zhen WANG Yiwei CHU Ying WU Qinghua 2009Chinese Journal of Electronics2009,18,2:5
17Dielectric monitoring method for the drug release mechanism of drug-loading chitosan microspheres显示文摘The chitosan microspheres loaded with model drug, salicylate molecular, are prepared, and the dielectric spectroscopy of this kind of suspension is measured, meanwhile a significant relaxation is observed for the microspheres suspension. By the modeling analytic of the relaxation, the parameters, which can reflect the properties of microspheres and continuous medium, are obtained. Furthermore, the releasing process of microspheres in aqueous phase is monitored real-timely, namely, by analyzing the time-dependent variation of the parameters reflecting the relaxation characteristics and electrical parameters in each phase the releasing process is detected. The research shows that the controlled release process of chitosan microspheres loaded with salicylate in aqueous phase is divided into three phases according to different releasing mechanisms. At the release stage, the quantitative relation between the phase parameters obtained by dielectric analysis and the amount of the salicylate carried in microspheres was derived, and a real-time monitoring method was established through releasing material in the microspheres at different times obtained by measuring and analyzing the dielectric spectroscopy.FANG Ming GAO JinLong WANG Sheng LIAN YiWei ZHAO KongShuang 2010Chinese Science Bulletin2010,55,13:5
18Correlation between the different chain lengths of free fatty acid oxidation and abili .ty of trophoblastic invasion显示文摘Yu Huan Yang Zi Ding Xiaoyan Wang Yanling Han Yiwei 2014Chinese Medical Journal2014,,19:5
19Classification and comparison of physical and chemical properties of corn stalk from three regions in China显示文摘Corn stalk samples from Anhui,Jiangxi and Shanghai were used as test materials.Their physical,chemical and thermo-chemical engineering characteristics were analyzed.The similarities and differences in properties of corn stalk from the three regions were determined using SIMCA-P and SPSS software in order to obtain a proper energy utilization method of corn stalk.The results show that the corn stalk from Shanghai has significant differences from the samples of Jiangxi and Anhui.In particular,the following properties of corn stalk from Shanghai such as the contents of cellulose,calcium(Ca),iron(Fe),crude ash,volatile matter,carbon(C),nitrogen(N),and oxygen(O)are significantly different from those of Jiangxi and Anhui samples(P<0.05).While other properties such as the contents of magnesium(Mg),copper(Cu),zinc(Zn),moisture,hydrogen(H),and sulfur(S)have no significant difference among samples of three regions.Compared with the corn stalk in Anhui and Jiangxi,the Shanghai samples are more suitable for the production of ethanol because of their higher ratio of cellulose to hemi-cellulose content.Because of its high content of ash and low calorific value,the Shanghai corn stalk is suitable for the gasification process instead of for direct combustion or bio-oil production.The research can provide a reference for raw material selection for biomass energy production and utilization.Wang Lu Liu Ronghou Sun Chen Cai Wenfei Tao Yiwei Yin Renzhan Mei Yuanfei 2014International Journal of Agricultural and Biological Engineering2014,7,6:5
20Differences in Atmospheric Heat Source between the Tibetan Plateau–South Asia Region and the Southern Indian Ocean and Their Impacts on the Indian Summer Monsoon Outbreak显示文摘In this paper, the NCEP–NCAR daily reanalysis data are used to investigate the characteristics of the atmospheric heat source/sink(AHSS) over South Asia(SA) and southern Indian Ocean(SIO). The thermal differences between these two regions and their influence on the outbreak of the Indian summer monsoon(ISM) are explored. Composite analysis and correlation analysis are applied. The results indicate that the intraseasonal variability of AHSS is significant in SA but insignificant in the SIO. Large inland areas in the Northern Hemisphere still behave as a heat sink in March, similar to the situation in winter. Significant differences are found in the distribution of AHSS between the ocean and land, with distinct land–ocean thermal contrast in April, and the pattern presents in the transitional period right before the ISM onset. In May, strong heat centers appear over the areas from the Indochina Peninsula to the Bay of Bengal and south of the Tibetan Plateau(TP), which is a typical pattern of AHSS distribution during the monsoon season. The timing of SA–SIO thermal difference turning positive is about 15 pentads in advance of the onset of the ISM. Then, after the thermal differences have turned positive, a pre-monsoon meridional circulation cell develops due to the near-surface heat center and the negative thermal contrast center, after which the meridional circulation of the ISM gradually establishes. In years of early(late) conversion of the SA–SIO thermal difference turning from negative to positive, the AHSS at all levels over the TP and SIO converts later(earlier) than normal and the establishment of the ascending and descending branches of the ISM's meridional circulation is later(earlier) too. Meanwhile,the establishment of the South Asian high over the TP is later(earlier) than normal and the conversion of the Mascarene high from winter to summer mode occurs anomalously late(early). As a result, the onset of the ISM is later(earlier) than normal. However, the difference in vorticity between early and late conversion only shows in the changes of strong vorticity centers' location in the upper and lower troposphere.Yiwei ZHANG Guangzhou FAN Wei HUA Yongli ZHANG Bingyun WANG Xin LAI 2017Journal of Meteorological Research2017,31,3:4
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