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| 1 | A zenith tropospheric delay correction model based on the regional CORS network显示文摘Tropospheric delay is a primary error source in earth observations and a variety of radio navigation technologies. In this paper, the relationship between zenith tropospheric delays and the elevation and longitude of stations is analyzed using the zenith tropospheric delay final products of International GNSS Service (IGS) stations from 2011. Two new models are proposed for estimating zenith tropospheric delays from regional CORS data without meteorological data. The proposed models are compared with the direct interpolation method and the remove-restore method using data from Guangxi CORS. The results show that the new models significantly improve the calculated precision. Finally, the root mean square (RMS) errors of the new models were used to estimate the surface precipitable water vapor (PWV) value at CORS station, which was determined to be less than 2 mm. | Huang Liangke Liu Lilong Yao Chaolong | 2012 | Geodesy and Geodynamics2012，3，4： | 11 |
| 2 | Spatiotemporal characteristics of GNSS-derived precipitable water vapor during heavy rainfall events in Guilin,China显示文摘Precipitable Water Vapor(PWV),as an important indicator of atmospheric water vapor,can be derived from Global Navigation Satellite System(GNSS)observations with the advantages of high precision and all-weather capacity.GNSS-derived PWV with a high spatiotemporal resolution has become an important source of observations in mete-orology,particularly for severe weather conditions,for water vapor is not well sampled in the current meteorological observing systems.In this study,an empirical atmospheric weighted mean temperature(Tm)model for Guilin is estab-lished using the radiosonde data from 2012 to 2017.Then,the observations at 11 GNSS stations in Guilin are used to investigate the spatiotemporal features of GNSS-derived PWV under the heavy rainfalls from June to July 2017.The results show that the new Tm model in Guilin has better performance with the mean bias and Root Mean Square(RMS)of−0.51 and 2.12 K,respectively,compared with other widely used models.Moreover,the GNSS PWV estimates are validated with the data at Guilin radiosonde station.Good agreements are found between GNSS-derived PWV and radiosonde-derived PWV with the mean bias and RMS of−0.9 and 3.53 mm,respectively.Finally,an investigation on the spatiotemporal characteristics of GNSS PWV during heavy rainfalls in Guilin is performed.It is shown that variations of PWV retrieved from GNSS have a direct relationship with the in situ rainfall measurements,and the PWV increases sharply before the arrival of a heavy rainfall and decreases to a stable state after the cease of the rainfall.It also reveals the moisture variation in several regions of Guilin during a heavy rainfall,which is significant for the moni-toring of rainfalls and weather forecast. | Liangke Huang Zhixiang Mo Shaofeng Xie Lilong Liu Chuanli Kang Shitai Wang | 2021 | Satellite Navigation2021，2，1： | 6 |
| 3 | Structure and Properties of PLA Composite Enhanced with Biomass Fillers from Herbaceous Plants显示文摘PLA composites containing biomass fillers from the three herbaceous plants such as reed,wheat stalk,and coco-nut fiber with length and diameter at the scale of several millimeters were prepared without using additives.The reinforcement effect on the properties of PLA/biomass filler composites is investigated.The research results show that the PLA/biomass filler composites exhibit good stiffness,flexural strength,and impact toughness.Among the three kinds of biomass fillers,reed reinforced PLA composites show optimal mechanical properties.When filled with 40%–50%reed,the flexural moduli of the composites are over 7000 MPa.Flexural strength retains at the same level of pure PLA.The notch impact strength reaches to 4.50±0.73 kJ/m^(2),which is 2.06 times higher than that of pure PLA.Furthermore,the introduction of biomass fillers increases the crystallization ability of PLA and does not increase the water absorption of the composites.This research demonstrated that PLA composites prepared with biomass fillers from the herbaceous plants(namely herb plastic composites,HPCs)is a material with good comprehensive mechanical properties while retaining the intrinsic particularity of biological sources. | Haining Na Juncheng Huang Hongguang Xu Fei Liu Liangke Xie Baoqing Zhu Jiuchen Wang Jin Zhu | 2023 | Journal of Renewable Materials2023，11，2： | 2 |
| 4 | Online video synopsis of structured motion 显示文摘 | Fu Wei Wang Jinqiao Gui Liangke | 2014 | Neurocomputing2014，135，： | 1 |
| 5 | Uptake of folate-eonjugated albumin nanoparticles to the SKOV3 cells显示文摘 | Zhang Liangke Hou Shixiang Mao Shengjun | 2004 | Pharm Nanotechol2004，287，： | 1 |
| 6 | Characterization of Shiga toxin 2-encoding bacteriophage Min27 isolated from Escherichia coli O157:H7 Strain of China显示文摘 | Liangke Su Chengping L U | 2009 | African Journal of Microbiology Research2009，3，11： | 1 |
| 7 | PreparationandcharacterizationofLiNi1/3Co1/3Mn1/3O2cathodematerialsforLi-ionbatteries显示文摘 | XiongLZ HuQ H LiangK etal | 2010 | JournalofFunctionalMaterials2010，41，4： | 1 |
| 8 | Evaluation of surface temperature and pressure derived from MERRA-2 and ERA5 reanalysis datasets and their applications in hourly GNSS precipitable water vapor retrieval over China显示文摘Temperature and pressure play key roles in Global Navigation Satellite System(GNSS) precipitable water vapor(PWV) retrieval. The National Aeronautics and Space Administration(NASA) and European Center for Medium-Range Weather Forecasts(ECMWF) have released their latest reanalysis product: the modern-era retrospective analysis for research and applications, version 2(MERRA-2) and the fifthgeneration ECMWF reanalysis(ERA5), respectively. Based on the reanalysis data, we evaluate and analyze the accuracy of the surface temperature and pressure products in China using the the measured temperature and pressure data from 609 ground meteorological stations in 2017 as reference values.Then the accuracy of the two datasets and their performances in estimating GNSS PWV are analyzed. The PWV derived from the pressure and temperature products of ERA5 and MERRA-2 has high accuracy. The annual average biases of pressure and temperature for ERA5 are-0.07 hPa and 0.45 K, with the root mean square error(RMSE) of 0.95 hPa and 2.04 K, respectively. The annual average biases of pressure and temperature for MERRA-2 are-0.01 hPa and 0.38 K, with the RMSE of 1.08 h Pa and 2.66 K, respectively.The accuracy of ERA5 is slightly higher than that of MERRA-2. The two reanalysis data show negative biases in most regions of China, with the highest to lowest accuracy in the following order: the south,north, northwest, and Tibet Plateau. Comparing the GNSS PWV calculated using MERRA-2(GNSS MERRA-2 PWV) and ERA5(GNSS ERA5 PWV) with the radiosonde-derived PWV from 48 co-located GNSS stations and the measured PWV of the co-location radiosonde stations, it is found that the accuracy of GNSS ERA5 PWV is better than that of GNSS MERRA-2 PWV. These results show the different applicability of surface temperature and pressure products from MERRA-2 and ERA5 data, indicating that both have important applications in meteorological research and GNSS water vapor monitoring in China. | Liangke Huang Xiaoyang Fang Tengxu Zhang Haoyu Wang Lei Cui Lilong Liu | 2023 | Geodesy and Geodynamics2023，14，2： | 1 |
| 9 | Studyofbonemorphogeneticprotein-2deliverywithdifferentTiO2nanotubestructures显示文摘 | LiangK LiXC TayBK | 2013 | NanosciNanotechLet2013，5，： | 1 |
| 10 | Refining the ERA5-based global model for vertical adjustment of zenith tropospheric delay显示文摘Tropospheric delay is an important factor affecting high precision Global Navigation Satellite System(GNSS)positioning and also the basic data for GNSS atmospheric research.However,the existing tropospheric delay models have some problems,such as only a single function used for the entire atmosphere.In this paper,an ERA5-based(the fifth generation of European Centre for Medium-Range Weather Forecasts Reanalysis)global model for vertical adjustment of Zenith Tropospheric Delay(ZTD)using a piecewise function is developed.The ZTD data at 611 radiosonde stations and the MERRA-2(second Modern-Era Retrospective analysis for Research and Applications)atmospheric reanalysis data were used to validate the model reliability.The Global Zenith Tropospheric Delay Piecewise(GZTD-P)model has excellent performance compared with the Global Pressure and Temperature(GPT3)model.Validated at radiosonde stations,the performance of the GZTD-P model was improved by 0.96 cm(23%)relative to the GPT3 model.Validated with MERRA-2 data,the quality of the GZTD-P model is improved by 1.8 cm(50%)compared to the GPT3 model,showing better accuracy and stability.The ZTD vertical adjustment model with different resolutions was established to enrich the model's applicability and speed up the process of tropospheric delay calculation.By providing model parameters with different resolutions,users can choose the appropriate model according to their applications. | Ge Zhu Liangke Huang Yunzhen Yang Junyu Li Lv Zhou Lilong Liu | 2022 | Satellite Navigation2022，3，3： | 1 |
| 11 | Uptake of folate-conjugated albumin nanoparticles to the SKOV3 cells显示文摘 | Liangke Zhang Shixiang Hou Shengjun Mao Dapeng Wei Xiangrong Song Yi Lu | 2004 | International Journal of Pharmaceutics2004，，1： | 1 |
| 12 | A new evolutionary approach to cutting stock problems with and without contiguity 显示文摘 | LIANGK H YAO X NEWTON C | 2002 | Computers and Operations Research2002，29，12： | 1 |
| 13 | SynthesisandcharacGterizationoforganicGinorganicperovskitethinfilmspreGparedusingaversatiletwoGstepdippingtechnique显示文摘 | LiangK MitziDB PrikasM T | 1998 | Chem Mater1998，10，1： | 1 |
| 14 | Uptake of folate-conjugated albumin nanoparticles to the SKOV3 cells显示文摘 | ZHANG Liangke HOU Shixiang MAO Shengjun | | 0，，： | 1 |
| 15 | A new linearization technique for CMOS RF mixer using third-order transconductance cancellation 显示文摘 | LIANGK LIN C CHANG H | 2008 | IEEE Microwave Wireless Compon Lett2008，18，5： | 1 |
| 16 | Study of the rheological properties and the finishing behavior of abrasive gels in abrasive flow machining显示文摘 | WANGAC LIUC H LIANGK Z | 2007 | Journal of Mechanical Science and Technology2007，21，10： | 1 |
| 17 | Preparation of konjac glucomannan-based pulsatile capsule for colonic drug delivery system and its evaluation in vitro and in vivo显示文摘 | LIU Jing ZHANG Liangke HU Wenjing | 2012 | Carbohydrate Polymers2012，87，： | 1 |
| 18 | An ERA5 tropospheric parameters-augmented approach for improving GNSS precise point positioning显示文摘Precise Point Positioning(PPP) technology has developed into a potent instrument for geodetic positioning, ionospheric modeling, tropospheric atmospheric parameter detection, and seismic monitoring.As atmospheric reanalysis data products’ accuracy and spatiotemporal resolution have improved recently, it has become important to apply these products to obtain high-accuracy tropospheric delay parameters, like zenith tropospheric delay(ZTD) and tropospheric horizontal gradient. These tropospheric delay parameters can be applied to PPP to reduce the convergence time and to increase the accuracy in the vertical direction of the position. The European Centre for Medium-Range Weather Forecasts Reanalysis 5(ERA5) atmospheric reanalysis data is the latest product with a high spatiotemporal resolution released by the European Center for Medium-Range Weather Forecasts(ECMWF). Only a few researches have evaluated the application of ERA5 data to Global Navigation Satellite System(GNSS)PPP. Therefore, this study compared and validated the ZTD products derived from ERA5 data using ZTD values provided by 290 global International GNSS Service(IGS) stations for 2016-2017. The results indicated a stable performance for ZTD, with annual average bias and RMS values of 0.23 cm and 1.09 cm,respectively. Further, GNSS observations for one week in each of the four seasons(spring: DOY 92-98;summer: DOY 199-205;autumn: DOY 275-281;and winter: DOY 22-28) from 34 multi-GNSS experiments(MGEX) stations distributed globally in 2016 were considered to evaluate the performance of ERA5-derived tropospheric delay products in GNSS PPP. The performance of ERA5-enhanced PPP was compared with that of the two standard GNSS PPP schemes(without estimated tropospheric horizontal gradient and with estimated tropospheric horizontal gradient). The results demonstrated that ERA5-enhanced GNSS PPP showed no significant improvement in the convergence times in both the Eastern(E) and Northern(N) directions, while the average convergence time over four weeks in the vertical(U)direction improved by 53.3% and 52.7%, respectively(in the case of pngm station). The average convergence times for each week in the U direction of the northern and southern hemisphere stations indicated a decrease of 16.3%, 12.6%, 9.6%, and 9.1%, and 16.9%, 9.6%, 8.9%, and 14.5%, respectively.Regarding positioning accuracy, ERA5-enhanced PPP showed an improvement of 13.3% and 16.2% over the two standard PPP schemes in the U direction, respectively. No significant improvement in the positioning performance was observed in both the E and N directions. Thus, this study demonstrated the potential application of the ERA5 tropospheric parameters-augmented approach to Beidou navigation and positioning. | Liangke Huang Feifan Liu Lijie Guo Guiwen Lan Lv Zhou Cheng Wang Lilong Liu | 2023 | Geodesy and Geodynamics2023，14，5： | 0 |
| 19 | Strain effects on the interfacial thermal conductance of graphene/h-BN heterostructure显示文摘Previous experimental and computational results have confirmed that the thermal conductivity of a twodimensional(2D) material can be considerably affected by strain. Numerous attention has been paid to explore the relevant mechanisms. However, the strain effects on the interfacial thermal conductance(ITC) of 2D heterostructure have attracted little attention. Herein, the non-equilibrium molecular dynamics(NEMD) simulations were conducted to the graphene/hexagonal boron nitride(GR/h-BN) heterostructure to investigate the strain effects on the ITC. Three types of strains were considered, i.e., tensile strain, compressive strain, and shear strain.The results indicate that the strain can adjust the ITC for the GR/h-BN heterostructure effectively, and the strain loading direction also influences the ITC. Generally, the tensile strain reduces the ITC of the heterostructure, in addition to the BN-C system at small tensile strain;both the compressive strain and shear strain increase the ITC,especially at a small strain. For the NB-C system, it is more sensitive to the strain loading direction and the yx shear strain of 0.06 is the most effective way to strengthen the ITC. Our results also show that the out-of-plane deformation weakens the in-plane vibration of atoms, leading to a reduction of the interfacial thermal energy transport. | Feng Liu YouKun Gong Rui Zou Huiming Ning Ning Hu Yaolu Liu Liangke Wu Fuhao Mo Shaoyun Fu Cheng Yan | 2022 | Nano Materials Science2022，4，3： | 0 |
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