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| 1 | A Soft Bionic Gripper with Variable Effective Length显示文摘 | Yufei Hao Zheyuan Gong Zhexin Xie Shaoya Guan Xingbang Yang Tianmiao Wang Li Wen | 2018 | Journal of Bionic Engineering2018，15，2： | 12 |
| 2 | Reconstruction of different scales of pore-fractures network of coal reservoir and its permeability prediction with Monte Carlo method显示文摘There are millimeter, micron and nanometer scales of pores and fractures in coal to describe different scales of coal pores and fissures communicating path and to quantitatively characterize their permeability. Such information provides an important basis for studying coalbed methane output mechanism. The pores and fissures in a large number of coal samples were observed and counted by scanning electron microscopy and optical microscopy. The probability distribution models of pore-fissure network were then established. Different scales of pore-fissures 2D network models were reconstructed by Monte Carlo method. The 2D seepage models were obtained through assignment zero method and using Matlab software. The effect of permeability on different scale pore-fractures network was obtained by two-dimensional seepage equation. Predicted permeability is compared with the measured ones. The results showed that the dominant order of different scale pore-fractures connected path from high to low is millimeter-sized fractures, seepage pores and micron-size fractures. The contribution of coal reservoir permeability from large to small is millimeter-size fractures, micron-size fractures and seepage pores. Different parameters in different scale pore-fractures are of different influence permeability.Reconstruction of different scale pore-fractures network can clearly display the connectivity of porefractures, which can provide a basis for selecting migration path and studying gas flow pattern. | Ni Xiaoming Chen Wenxue Li Zheyuan Gao Xiang | 2017 | International Journal of Mining Science and Technology2017，27，4： | 5 |
| 3 | Hierarchical graphene@MXene composite foam modified with flower-shaped FeS for efficient and broadband electromagnetic absorption显示文摘Developing high-performance broadband microwave absorption material becomes an urgent concern in the field of electromagnetic protection.In this work,an ultralight magnetic composite foam was con-structed by electrostatic self-assembly of MXene on the surface of graphene skeletons,and subsequent hydrothermal anchoring of flower-shaped FeS clusters.Under the synergistic effect of MXene coating in-creasing conductive loss and FeS clusters improving magnetic loss,the rational construction of hierarchi-cal impedance structure in foam can effectively promote the entrance and consumption of more incident electromagnetic waves.The minimum reflection loss(RL min)reaches-47.17 dB at a thickness of 4.78 mm,and the corresponding effective absorption bandwidth(EAB)is up to 6.15 GHz.More importantly,the microwave absorption performance of composite foam can be further optimized by controlling the load-ing of MXene and thermal treatment at a low temperature.The maximum of EAB for GMF-300 can be extended to an unprecedented value of 11.20 GHz(covering 6.10-17.30 GHz). | Shuangshuang Li Xinwei Tang Xu Zhao Shijie Lu Jiangtao Luo Zheyuan Chai Tiantian Ma Qianqian Lan Piming Ma Weifu Dong Zicheng Wang Tianxi Liu | 2023 | Journal of Materials Science & Technology2023，，2： | 4 |
| 4 | A Bio-inspired Soft Robotic Arm: Kinematic Modeling and Hydrodynamic Experiments显示文摘 | Zheyuan Gong Jiahui Cheng Xingyu Chen Wenguang Sun Xi Fang Kainan Hu Zhexin Xie Tianmiao Wang Li Wen | 2018 | Journal of Bionic Engineering2018，15，2： | 3 |
| 5 | Monitoring of ground deformation in Liulin district,China using InSAR approaches显示文摘Coalbed methane(CBM)exploration generally refers to a technique that extracts natural gas from coal beds.The development of CBM in Liulin,China,has experienced a significantly growth period during the past two decades.Previous research mainly focused on the coal geological background or CBM technique itself,while time series InSAR(TS-InSAR)technique was conducted in this work to study the potential land deformation induced by CBM extraction from 2003 to 2011.In total,21 ALOS-1 PALSAR images(acquired from 22 December 2006 to 2 January 2011)and 14 ENVISAT ASAR scenes(captured between 29 October 2003 and 7 November 2007)were used.The TS-InSAR outcome revealed that the annual deformation rates were ranging from 15 to−40 mm yr−1 over the study region.Then the time series deformation evolutions were analysed over 8 CBM sites(No.4 coal seam)out of 20,and the subsidence rates between 1.9 and−6.5 mm yr−1 were derived.In addition,the average subsidence rate and standard deviation among these eight measurements were−3.0 and 2.6 mm yr−1 respectively,suggesting that these CBM extraction sites were quite stable and no obvious subsidence had been observed during this eight-year period. | Zheyuan Du Linlin Ge Alex Hay-Man Ng Xiaojing Li Liyuan Li | 2018 | International Journal of Digital Earth2018，11，3： | 1 |
| 6 | Phosphorylation-mediated interaction between human E26 transcription factor 1 and specific protein 1 is required for tumor cell migration显示文摘Transcription factors,human E26 transcription factor 1(Ets1)and specific protein 1(Sp1),are known to induce gene expression in tumorigenicity.High Ets1 expression is often associated with colorectal tumorigenesis.In this study,we discover that metastasis and clone formation in SW480 cells mainly depend on the direct interaction between Ets1 and Sp1 instead of high Ets1 expression.The interaction domains are further addressed to be the segment at Sp1(626-708)and the segment at Ets1(244-331).In addition,the phosphorylation inhibition of Ets1 at Tyr283 by either downregulation of Src kinase or Src family inhibitor treatment decreases the interaction between Sp1 and Ets1 and suppresses SW480 migration.Either administration or overexpression of the peptides harboring the interaction segment strongly inhibits the colony formation and migration of SW480 cells.Our findings suggest that the interaction between Ets1 and Sp1 rather than Ets1 alone promotes transformation in SW480 cells and provide new insight into the Ets1 and Sp1 interaction as an antitumour target in SW480 cells. | Xianhui Wen Xingsheng Sun Zheyuan Ou Jun Jiang Qingmei Chen Xirong He Zhangsheng Hu Han Qiao Kuan Zhou Xin Li Yiqun Deng Jikai Wen | 2022 | Acta Biochimica et Biophysica Sinica2022，54，10： | 0 |
| 7 | Mapping land subsidence over the eastern Beijing city using satellite radar interferometry显示文摘Beijing City has suffered from groundwater-induced subsidence since the late 1930s and the over-exploration of groundwater could lead to subsidence as much as−12.0 cm yr−1.Previous studies on the ground deformation at Beijing City mainly focused on the period before the year of 2014 when a mega-engineering project was launched to reduce water shortage in Beijing.To study the most recent ground deformation,19 L-band ALOS-1 PALSAR images(June 2007–January 2011),24 C-band Sentinel-1 SAR images(June 2015–November 2016)together with 9 ALOS-2 PALSAR acquisitions(September 2014–February 2017)were analysed in this work.Levelling measurements were exploited to verify the ALOS-1-based time series InSAR(TS-InSAR)result while Sentinel-1 and ALOS-2 result were cross-verified with each other.Furthermore,the whole study area was divided into four sub-zones,and the result indicated that the subsidence rates over five townships,Cuigezhuan,Jinzhan,Liyuan,Songzhuang and Yanjiao were accelerating and more attentions should be paid.On the contrary,the town centre of Douge Zhuang township experienced a decreasing trend between these two temporal-periods.Additionally,the time series measurements with respect to five selected measurement points and the profile line along the subsidence hot spots were analysed. | Zheyuan Du Linlin Ge Alex Hay-Man Ng Li Xiaojing Liyuan Li | 2018 | International Journal of Digital Earth2018，11，5： | 0 |
| 8 | RFCNet:Remote Sensing Image Super-Resolution Using Residual Feature Calibration Network显示文摘In the field of single remote sensing image Super-Resolution(SR),deep Convolutional Neural Networks(CNNs)have achieved top performance.To further enhance convolutional module performance in processing remote sensing images,we construct an efficient residual feature calibration block to generate expressive features.After harvesting residual features,we first divide them into two parts along the channel dimension.One part flows to the Self-Calibrated Convolution(SCC)to be further refined,and the other part is rescaled by the proposed Two-Path Channel Attention(TPCA)mechanism.SCC corrects local features according to their expressions under the deep receptive field,so that the features can be refined without increasing the number of calculations.The proposed TPCA uses the means and variances of feature maps to obtain accurate channel attention vectors.Moreover,a region-level nonlocal operation is introduced to capture long-distance spatial contextual information by exploring pixel dependencies at the region level.Extensive experiments demonstrate that the proposed residual feature calibration network is superior to other SR methods in terms of quantitative metrics and visual quality. | Yuan Xue Liangliang Li Zheyuan Wang Chenchen Jiang Minqin Liu Jiawen Wang Kaipeng Sun Hongbing Ma | 2023 | Tsinghua Science and Technology2023，28，3： | 0 |
| 9 | Distinct gut microbiota and health outcomes in asymptomatic infection,viral nucleic acid test re-positive,and convalescent COVID-19 cases显示文摘Gut microbiota composition is suggested to associate with coronavirus disease 2019(COVID-19)severity,but the impact of gut microbiota on health outcomes is largely unclear.We recruited 81 individuals from Wuhan,China,including 13 asymptomatic infection cases(Group A),24 COVID-19 convalescents with adverse outcomes(Group C),31 severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)re-positive cases(Group D),and 13 non-COVID-19 healthy controls(Group H).The microbial features of Groups A and D were similar and exhibited higher gut microbial diversity and more abundant short-chain fatty acid(SCFA)-producing species than Group C.Group C was enriched with opportunistic pathogens and virulence factors related to adhesion and toxin production.The abundance of SCFA-producing species was negatively correlated,while Escherichia coli was positively correlated with adverse outcomes.All three groups(A,C,and D)were enriched with the mucusdegrading species Akkermansia muciniphila,but decreased with Bacteroides-encoded carbohydrate-active enzymes.The pathways of vitamin B6 metabolic and folate biosynthesis were decreased,while selenocompound metabolism was increased in the three groups.Specifically,the secondary bile acid(BA)metabolic pathway was enriched in Group A.Antibiotic resistance genes were common among the three groups.Conclusively,the gut microbiota was related to the health outcomes of COVID-19.Dietary supplementations(SCFAs,BA,selenium,folate,vitamin B6)may be beneficial to COVID-19 patients. | Ruqin Lin Mingzhong Xiao Shanshan Cao Yu Sun Linhua Zhao Xiaoxiao Mao Peng Chen Xiaolin Tong Zheyuan Ou Hui Zhu Dong Men Xiaodong Li Yiqun Deng Xian-En Zhang Jikai Wen | 2022 | mLife2022，1，2： | 0 |
| 10 | Indoor metabolites and chemicals outperform microbiome in classifying childhood asthma and allergic rhinitis显示文摘Indoor microorganisms impact asthma and allergic rhinitis(AR),but the associated microbial taxa often vary extensively due to climate and geographical variations.To provide more consistent environmental assessments,new perspectives on microbial exposure for asthma and AR are needed.Home dust from 97 cases(32 asthma alone,37 AR alone,28 comorbidity)and 52 age-and gender-matched controls in Shanghai,China,were analyzed using high-throughput shotgun metagenomic sequencing and liquid chromatography-mass spectrometry.Homes of healthy children were enriched with environmental microbes,including Paracoccus,Pseudomonas,and Psychrobacter,and metabolites like keto acids,indoles,pyridines,and flavonoids(astragalin,hesperidin)(False Discovery Rate<0.05).A neural network co-occurrence probability analysis revealed that environmental microorganisms were involved in producing these keto acids,indoles,and pyridines.Conversely,homes of diseased children were enriched with mycotoxins and synthetic chemicals,including herbicides,insecticides,and food/cosmetic additives.Using a random forest model,characteristic metabolites and microorganisms in Shanghai homes were used to classify high and low prevalence of asthma/AR in an independent dataset in Malaysian schools(N=1290).Indoor metabolites achieved an average accuracy of 74.9%and 77.1%in differentiating schools with high and low prevalence of asthma and AR,respectively,whereas indoor microorganisms only achieved 51.0%and 59.5%,respectively.These results suggest that indoor metabolites and chemicals rather than indoor microbiome are potentially superior environmental indicators for childhood asthma and AR.This study extends the traditional risk assessment focusing on allergens or air pollutants in childhood asthma and AR,thereby revealing potential novel intervention strategies for these diseases. | Yu Sun Hao Tang Shuang Du Yang Chen Zheyuan Ou Mei Zhang Zhuoru Chen Zhiwei Tang Dongjun Zhang Tianyi Chen Yanyi Xu Jiufeng Li Dan Norback Jamal Hisham Hashim Zailina Hashim Jie Shao Xi Fu Zhuohui Zhao | 2023 | Eco-Environment & Health2023，2，4： | 0 |
| 11 | Information Purification Network for Remote Sensing Image Super-Resolution显示文摘Recently,several well-performing deep convolutional neural networks were proposed for remote sensing image super-resolution(SR).However,these methods rarely consider that remote sensing images are corruptible by additional noise,blurring,and other factors.Therefore,to eliminate the interference of these factors,especially the noise,we propose a novel information purification network(IPN)for remote sensing image SR.The proposed information purification block(IPB)can process channel-wise features differently by channel separation and rescale spatial-wise features adaptively through the proposed multi-scale spatial attention mechanism.We further design an information group to explore a more powerful expressive combination of IPBs.Moreover,long and short skip connections can transmit abundant low-frequency information,making IPBs pay more attention to high-frequency information.We mix the images under various degradation models as training data in the training phase.In this way,the network can directly reconstruct various degraded images.Experiments on AID and UC Merced Land-Use datasets under multiple degradation models demonstrate that the proposed IPN performs better than state-of-the-art methods. | Zheyuan Wang Liangliang Li Linxin Xing Jiawen Wang Kaipeng Sun Hongbing Ma | 2023 | Tsinghua Science and Technology2023，28，2： | 0 |
| 12 | Dispersion characteristics of switching transients from large‐scale experiments in a 1100 kV gas insulated switchgear circuit显示文摘The switching operation of gas insulated switchgear(GIS)disconnector will produce multiple random spark discharges between the gas gaps of the disconnector.Each spark discharge can be affected by various random factors,such as trapped charge on the load side,the initial operating phase,gap distance and operating speed of the disconnector,leading to dispersion characteristics.At present,some studies have mentioned this dispersion,but its impact is still unclear due to the lack of experimental data,resulting in a deviation between the simulation results and the measured results.In this study,thousands of switching operations were carried out based on the 1100 kV full‐scale GIS circuit in Wuhan ultra‐high voltage alternating current Test Base.The maximal information coeffi-cient analysis,linear regression fitting and other statistical methods were used to discuss the dispersion characteristics of very fast transient overvoltage(VFTO)and transient enclosure voltage(TEV)from large‐scale experimental data.The results show that the dispersion of VFTO and TEV in amplitude aspects both increase gradually as the breakdown voltage increases,with the maximum difference of five times of TEV amplitude at normalised breakdown voltage.In terms of frequency characteristics,the dispersion of different fre-quency components in TEV is always greater than that of VFTO,especially for the high‐frequency components.Moreover,by comparing the frequency characteristics of TEV at different positions,we notice that the dispersion is almost independent of the spatial po-sition but only determined by the randomness of spark discharges.These discoveries reveal the importance of the dispersion in switching transients and make up for the lack of theoretical understanding of the correlation among them. | Zihan Teng Weijiang Chen Jiangong Zhang Baoquan Wan Jun Zhao Kejie Li Zhenghai Liao Zheyuan Gan | 2023 | High Voltage2023，8，6： | 0 |
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