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| 1 | Mechanical property of artificial methane hydrate under triaxial compression显示文摘Methane production from hydrate reservoir may induce seabed slide and deformation of the hydrate-bearing strata.The research on mechanical properties of methane hydrate is considered to be important for developing an efficient methane exploitation technology.In this paper,a triaxial test system containing a pressure crystal device was developed with the conditions to stabilize the hydrate.A series of triaxial shear tests were carried out on artificial methane hydrate specimen.In addition,mechanical characteristics of methane hydrate were studied with the strain rates of 0.1 and 1.0 mm/min,respectively,under the conditions of different temperatures(T =-5,-10,and-20 ℃) and confining pressures(P = 0,5,10,15,and 20 MPa).The preliminary results show that when the confining pressure was less than 10 MPa,the increase of confining pressure leaded to the enhancement of shear strength.Furthermore,the decreasing temperature and the increasing strain rate both caused the increase in shear strength. | Yongchen Song Feng Yu Yanghui Li Weiguo Liu Jiafei Zhao | 2010 | Journal of Natural Gas Chemistry2010，19，3： | 28 |
| 2 | The status of exploitation techniques of natural gas hydrate显示文摘Natural gas hydrate(NGH)has been widely considered as an alternative form of energy with huge potential,due to its tremendous reserves,cleanness and high energy density.Several countries involving Japan,Canada,India and China have launched national projects on the exploration and exploitation of gas hydrate resources.At the beginning of this century,an early trial production of hydrate resources was carried out in Mallik permafrost region,Canada.Japan has conducted the first field test from marine hydrates in 2013,followed by another trial in 2017.China also made its first trial production from marine hydrate sediments in 2017.Yet the low production efficiency,ice/hydrate regeneration,and sand problems are still commonly encountered;the worldwide progress is far before commercialization.Up to now,many gas production techniques have been proposed,and a few of them have been adopted in the field production tests.Nevertheless,hardly any method appears really promising;each of them shows limitations at certain conditions.Therefore,further efforts should be made on the economic efficiency as well as sustainability and environmental impacts.In this paper,the investigations on NGH exploitation techniques are comprehensively reviewed,involving depressurization,thermal stimulation,chemical inhibitor injection,CO2–CH4 exchange,their combinations,and some novel techniques.The behavior of each method and its further potential in the field test are discussed.The advantages and limitations of laboratory studies are also analyzed.The work could give some guidance in the future formulation of exploitation scheme and evaluation of gas production behavior from hydrate reservoirs. | Lei Yang Yulong Liu Hanquan Zhang Bo Xiao Xianwei Guo Rupeng Wei Lei Xu Lingjie Sun Bin Yu Shudong Leng Yanghui Li | 2019 | Chinese Journal of Chemical Engineering2019，27，9： | 9 |
| 3 | Influence factors of methane hydrate formation from ice:Temperature,pressure and SDS surfactant显示文摘A series of experiments of forming hydrate from ice powders in different conditions have been carried out with constant volume method to evaluate the influence factors such as pressure, temperature, and SDS surfactant. The change of temperature and pressure were collected as a function of elapsed time, which were used to calculate the gas consumption and hydrate saturation during hydrate formation(pVT method). Based on the experimental results and the analysis, it is concluded that:(1) Both initial pressure and temperature have effect on the hydrate formation and temperature plays a more important role in the process;(2) heating and secondary pressurization will promote the gas hydrate formation and enhance the hydrate saturation as a result. Meanwhile, the promotion of heating seems to be more obvious than that of secondary pressurization;(3) different concentrations of SDS surfactant have clearly influence on the saturation of gas hydrate and there is an optimal concentration to promote the hydrate formation. | Weiguo Liu Yanghui Li Xiaohu Xu | 2019 | Chinese Journal of Chemical Engineering2019，27，2： | 5 |
| 4 | The double face of miR-320:cardiomyocytes-derived miR-320 deteriorated while fibroblasts-derived miR-320 protected against heart failure induced by transverse aortic constriction显示文摘MicroRNAs(miRNAs)are aberrantly expressed in the pathophysiologic process of heart failure(HF).However,the functions of a certain miRNA in different cardiac cell types during HF are scarcely reported,which might be covered by the globe effects of it on the heart.In the current study,Langendorff system was applied to isolate card io myocytes(CMs)and cardiac fibroblasts(CFs)from transverse aortic constriction(TAC)-induced mice.Slight increase of miR-320 expression was observed in the whole heart tissue of TAC mice.Interestingly,miR-320 was significantly elevated in CMs but decreased in CFs from TAC mice at different time points.Then,recombinant adeno-associated virus 9 with cell-type-specific promoters were used to manipulate miR-320 expressions in vivo.Both in vitro and in vivo experiments showed the miR-320 overexpression in CMs exacerbated cardiac dysfunction,whereas overexpression of miR-320 in CFs alleviated cardiac fibrosis and hypertrophy.Mechanically,downstream signaling pathway analyses revealed that miR-320 might induce various effects via targeting PLEKHM3 and IFITM1 in CMs and CFs,respectively.Moreover,miR-320 mediated effects could be abolished by PLEKHM3 re-expression in CMs or IFITM1 re-expression in CFs.Interestingly,miR-320 treated CFs were able to indirectly affect CMs function,but not vice versa.Meanwhile,upstream signaling pathway analyses showed that miR-320 expression and decay rate were rigorously manipulated by Ago2,which was regulated by a cluster of cell-type-specific TFs distinctively expressed in CMs and CFs,respectively.Together,we demonstrated that miR-320 functioned differently in various cell types of the heart during the progression of HF. | Xudong Zhang Shuai Yuan Huaping Li Jiabing Zhan Feng Wang Jiahui Fan Xiang Nie Yan Wang Zheng Wen Yanghui Chen Chen Chen Dao Wen Wang | 2021 | Signal Transduction and Targeted Therapy2021，6，3： | 4 |
| 5 | A Sample-Efficient Actor-Critic Algorithm for Recommendation Diversification显示文摘Diversifying recommendation results gains benefits from satisfying user's existing interests as well as exploring novel information needs.Recently proposed Monte-Carlo based reinforcement learning method suffers from sample inefficiency,large variance,and even failing to perform well in large action space.We propose a novel actor・critic reinfbrcement learning algorithm for recommendation diversifica tion in order to solve the above mentioned problems.The actor acts as the ranking policy,while the introduced critic predicts the expected future rewards of each candidate action.The critic target is updated by full Bellman equation and the actor net work is opti mized using expected gradient in the whole action space.To further stabilize and improve the performance,we also add policy-filtered critic supervision loss.Experiments on MovieLens dataset well demonstrate the effectiveness of our approach over multiple competitive met hods. | LI Shuang YAN Yanghui REN Ju ZHOU Yuezhi ZHANG Yaoxue | 2020 | Chinese Journal of Electronics2020，29，1： | 4 |
| 6 | Numerical studies of hydrate dissociation and gas production behavior in porous media during depressurization process显示文摘In this study,a numerical model is developed to investigate the hydrate dissociation and gas production in porous media by depressurization.A series of simulation runs are conducted to study the impacts of permeability characteristics,including permeability reduction exponent,absolute permeability,hydrate accumulation habits and hydrate saturation,sand average grain size and irreducible water saturation.The effects of the distribution of hydrate in porous media are examined by adapting conceptual models of hydrate accumulation habits into simulations to govern the evolution of permeability with hydrate decomposition,which is also compared with the conventional reservoir permeability model,i.e.Corey model.The simulations show that the hydrate dissociation rate increases with the decrease of permeability reduction exponent,hydrate saturation and the sand average grain size.Compared with the conceptual models of hydrate accumulation habits,our simulations indicate that Corey model overpredicts the gas production and the performance of hydrate coating models is superior to that of hydrate filling models in gas production,which behavior does follow by the order of capillary coating>pore coating>pore filling>capillary filling.From the analysis of t1/2,some interesting results are suggested as follows:(1) there is a 'switch' value(the'switch'absolute permeability) for laboratory-scale hydrate dissociation in porous media,the absolute permeability has almost no influence on the gas production behavior when the permeability exceeds the 'switch' value.In this study,the 'switch' value of absolute permeability can be estimated to be between 10 and 50 md.(2) An optimum value of initial effective water saturation Sw,e exists where hydrate dissociation rate reaches the maximum and the optimum value largely coincides with the value of irreducible water saturation S wr,e.For the case of Sw,Swr,e,there are different control mechanisms dominating the process of hydrate dissociation and gas production. | Xuke Ruan Mingjun Yang Yongchen Song Haifeng Liang Yanghui Li | 2012 | Journal of Natural Gas Chemistry2012，21，4： | 3 |
| 7 | Adsorption isotherms and kinetic characteristics of methane on block anthracite over a wide pressure range显示文摘It is important to quantitatively understand the methane adsorption and transport mechanism in coal for an evaluation of the reserves and for its production forecast. In this work, a block coal sample was chosen to perform the CH4 adsorption experiments using the gravimetric method at temperatures of 293.60 K, 311.26 K, 332.98 K and 352.55 K and pressures up to 19 MPa. The excess adsorption capacity of CH4 in dry block anthracite increased, followed by a sequence decrease with the increasing pressure. High temperature restrained the growth of the excess adsorption due to that the adsorption is an intrinsically physical and exothermic process. The excess adsorption peak decreased slowly with the increase of temperature and intersected at a pressure of more than 18 MPa; meanwhile, the pressure at the excess adsorption peak increased.The existing correlations were examined in terms of density rather than pressure. The DR+k correlation, with an average relative deviation of ±0.51%, fitted our data better than the others, with an average relative deviation of up to 2.29%. The transportation characteristics of CH4 adsorption was also investigated in this study, including the adsorption rate and diffusion in block coal. The kinetic data could be described by a modified unipore model. The adsorption rates were found to exhibit dependence on pressure and temperature at low pressures, while the calculated diffusivities exhibited little temperature dependence. In addition, the kinetic characteristics were compared between CH4 and CO2 adsorption on the block coal. The excess adsorption ratios of CO2 to CH4obtained from the DR+k model decreased with the increasing pressure. | Wanli Xing Yongchen Song Yi Zhang Weiguo Liu Lanlan Jiang Yanghui Li Yuechao Zhao | 2015 | Journal of Energy Chemistry2015，24，2： | 2 |
| 8 | Review of 4Pi Fluorescence Nanoscopy显示文摘Since the 1990s,continuous technical and scientific advances have defied the diffraction limit in microscopy and enabled three-dimensional(3D)super-resolution imaging.An important milestone in this pursuit is the coherent utilization of two opposing objectives(4Pi geometry)and its combination with superresolution microscopy.Herein,we review the recent progress in 4Pi nanoscopy,which provides a 3D,non-invasive,diffraction-unlimited,and isotropic resolution in transparent samples.This review includes both the targeted and stochastic switching modalities of 4Pi nanoscopy.The schematics,principles,applications,and future potential of 4Pi nanoscopy are discussed in detail. | Xiang Hao Yiming Li Shuang Fu Yanghui Li Yingke Xu Cuifang Kuang Xu Liu | 2022 | Engineering2022，8，4： | 2 |
| 9 | EDTA-assisted hydrothermal synthesis of flower-like CoSe_2 nanorods as an efficient electrocatalyst for the hydrogen evolution reaction显示文摘Hydrogen evolution reaction(HER) is a prospective method to generate pure hydrogen. The development of superior electrocatalysts based on earth-abundant materials, plays a critical role in the future.CoSe_2, one of the earth-abundant electrocatalysts, has been proved to be a promising catalyst for hydrogen generation. In our work, flower-like CoSe_2 nanorods with high quality are successfully synthesized through a facile ethylenediaminetetraacetic acid ligand(EDTA)-assisted hydrothermal process. The flower-like CoSe_2 nanorods show the brilliant electrochemical HER performance with 100 mA cm^(-2) at overpotential of 273 m V, a small Tafel slope of 35 mV dec^(-1) and strong durability in acid solution. The sparkly HER catalytic activity of CoSe_2 can be ascribed to its particular structure with large surface area and abundant active sites. Therefore, this work offers an outstanding candidate for improving hydrogen production capabilities by water electrolysis. | Yanghui Deng Cui Ye Guo Chen Baixiang Tao Hongqun Luo Nianbing Li | 2019 | Journal of Energy Chemistry2019，28，1： | 2 |
| 10 | A De Novo Variant Identified in the PPP2R1A Gene in an Infant Induces Neurodevelopmental Abnormalities显示文摘Dear Editor,Neurodevelopmental disorders include a wide range of conditions such as epilepsy,intellectual disability,and autism spectrum disorder.These disorders commonly cooccur in patients,which suggests that they share a common etiology[1,2].Genetic advances resulting from sequencing techniques over the past few years have greatly expanded our understanding of neurodevelopmental disorders. | Yanghui Zhang Haoxian Li Hua Wang Zhengjun Jia Hui Xi Xiao Mao | 2020 | Neuroscience Bulletin2020，36，2： | 1 |
| 11 | The status of natural gas hydrate research in China: A review显示文摘 | Song Yongchen Yang Lei Zhao Jiafei Liu Weiguo Yang Mingjun Li Yanghui | 2014 | Renewable and Sustainable Energy Reviews2014，31，： | 1 |
| 12 | Effects of submergence on photosynthesis and growth of Pterocarya stenoptera (Chinese wingnut) seedlings in the recently-created Three Gorges Reservoir region of China显示文摘 | LI Changxiao WEI Hong GENG Yanghui | 2010 | Wetlands Ecology and Management2010，18，4： | 1 |
| 13 | Comparative studies on physiological and biochemical adaptation of Taxodium distichum and Taxudium ascendens seedlings to different soil water regimes 显示文摘 | LI Changxiao ZHONG Zhangcheng GENG Yanghui | 2010 | Plant and Soil2010，329，12： | 1 |
| 14 | Artesunate alleviates hepatic fibrosis induced by multiple pathogenic factors and inflammation through the inhibition of LPS/TLR4/NF-κB signaling pathway in rats显示文摘 | Lina Lai Yunxia Chen Xiaoxia Tian Xujiong Li Xiaojing Zhang Jingwen Lei Yanghui Bi Buwu Fang Xiaoliang Song | 2015 | European Journal of Pharmacology2015，，： | 1 |
| 15 | Effects of submergence on photosynthesis and growth of Pterocarya stenoptera (Chinese wingnut) seedlings in the recently-created Three Gorges Reservoir region of China显示文摘 | Li Changxiao Wei Hong Geng Yanghui | 2010 | Wetlands Ecology and Management2010，18，4： | 1 |
| 16 | Hydrophilic microsphere based mesoscopic-lens microscope (MMM)显示文摘 | Xiang Hao Cuifang Kuang Yanghui Li Xu Liu Yulong Ku Yunshan Jiang | 2012 | Optics Communications2012，，20： | 1 |
| 17 | Hydrophilic microsphere based mesoscopic-lens microscope (MMM)显示文摘 | Xiang Hao Cuifang Kuang Yanghui Li Xu Liu Yulong Ku Yunshan Jiang | 2012 | Optics Communications2012，，20： | 1 |
| 18 | From microscopy to nanoscopy via visible light显示文摘The resolution of conventional optical equipment is always restricted by the diffraction limit,and improving on this was previously considered improbable.Optical super-resolution imaging,which has recently experienced rapid growth and attracted increasing global interest,will result in applications in many domains,benefiting fields such as biology,medicine and material research.This review discusses the contributions of different researchers who identified the diffractive barrier and attempted to realize optical super-resolution.This is followed by a personal viewpoint of the development of optical nanoscopy in recent decades and the road towards the next generation of optical nanoscopy. | Xiang Hao Cuifang Kuang Zhaotai Gu Yifan Wang Shuai Li Yulong Ku Yanghui Li Jianhong Ge Xu Liu | 2013 | Light(Science & Applications)2013，2，1： | 1 |
| 19 | Record-Breaking Frequency of 44 GHz Based on the Higher Order Mode of Surface Acoustic Waves with LiNbO_(3)/SiO_(2)/SiC Heterostructures显示文摘Surface acoustic wave (SAW) technology has been extensively explored for wireless communication, sensors, microfluidics, photonics, and quantum information processing. However, due to fabrication issues, the frequencies of SAW devices are typically limited to within a few gigahertz, which severely restricts their applications in 5G communication, precision sensing, photonics, and quantum control. To solve this critical problem, we propose a hybrid strategy that integrates a nanomanufacturing process (i.e., nanolithography) with a LiNbO_(3)/SiO_(2)/SiC heterostructure and successfully achieve a record-breaking frequency of about 44 GHz for SAW devices, in addition to large electromechanical coupling coefficients of up to 15.7%. We perform a theoretical analysis and identify the guided higher order wave modes generated on these slow-on-fast SAW platforms. To demonstrate the superior sensing performance of the proposed ultra-high-frequency SAW platforms, we perform micro-mass sensing and obtain an extremely high sensitivity of approximately 33151.9 MHz·mm2·μg−1, which is about 1011 times higher than that of a conventional quartz crystal microbalance (QCM) and about 4000 times higher than that of a conventional SAW device with a frequency of 978 MHz. | Jian Zhou Dinghong Zhang Yanghui Liu Fengling Zhuo Lirong Qian Honglang Li Yong-Qing Fu Huigao Duan | 2023 | Engineering2023，，1： | 1 |
| 20 | Mantle flow underneath the South China Sea revealed by seismic anisotropy显示文摘It has long been established that plastic flow in the asthenosphere interacts constantly with the overlying lithosphere and plays a pivotal role in controlling the occurrence of geohazards such as earthquakes and volcanic eruptions.Unfortunately,accurately characterizing the direction and lateral extents of the mantle flow field is notoriously difficult,especially in oceanic areas where deployment of ocean bottom seismometers(OBSs)is expensive and thus rare.In this study,by applying shear wave splitting analyses to a dataset recorded by an OBS array that we deployed between mid-2019 and mid-2020 in the South China Sea(SCS),we show that the dominant mantle flow field has a NNW-SSE orientation,which can be attributed to mantle flow extruded from the Tibetan Plateau by the ongoing Indian-Eurasian collision.In addition,the results suggest that E-W oriented flow fields observed in South China and the Indochina Peninsula do not extend to the central SCS. | Fansheng Kong Rui Gao Stephen S.Gao Kelly H.Liu Weiwei Ding Xiongwei Niu Aiguo Ruan Pingchuan Tan Jianke Fan Shaoping Lu Zhengyi Tong Liqun Cheng Wenfei Gong Yanghui Zhao Jiabiao Li | 2023 | National Science Review2023，10，10： | 0 |
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