|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Target localization and parameters estimation by sonar system with explosions as underwater sound sources显示文摘Underwater target localization and parameters(azimuth and range) estimation by the method of utilizing explosions as underwater sound sources are described in this paper.The narrow beam reverberation model of the target echo signal is researched to estimate the target azimuth in reverberation background.Estimation errors of target azimuth and range are studied and proved to approximately meet Gauss distribution.Then the variance formula of target range error is deduced.Simulation experiments are applied to research the target range error and its standard deviation,and a series of measures to improve the estimation accuracy of target range are proposed.It is confirmed by the data processing results of simulations and lake experiments that the proposed method can accurately locate underwater target at a long distance on the condition of a certain underwater explosion range error. | YAN Sheng WEI Xiaojun HAO Chengpeng MA Hui YAN Shefeng | 2016 | Chinese Journal of Acoustics2016，35，4： | 4 |
| 2 | Methodology for credibility assessment of historical global LUCC datasets显示文摘Land use-induced land cover change(LUCC)is an important anthropogenic driving force of global change that has influenced,and is still influencing,many aspects of regional and global environments.Accurate historical global land use/cover datasets are essential for a better understanding of the impacts of LUCC on global change.However,there are not only evident inconsistencies in current historical global land use/cover datasets,but inaccuracies in the data in these global dataset revealed by historical record-based reconstructed regional data throughout the world.A focus in historical LUCC and global change research relates to how the accuracy of historical global land cover datasets can be improved.A methodology for assessing the credibility of existing historical global land cover datasets that addresses temporal as well as spatial changes in the amount and distribution of land cover is therefore needed.Theoretically,the credibility of a global land cover dataset could be assessed by comparing similarities or differences in the data according to actual land cover data(the'true value').However,it is extremely difficult to obtain historical evidence for assessing the credibility of historical global land cover datasets,which cannot be verified through field sampling like contemporary global land cover datasets.We proposed a methodological framework for assessing the credibility of global land cover datasets.Considering the types and characteristics of the available evidence used for assessments,we outlined four methodological approaches:(1)accuracy assessment based on regional quantitative reconstructed land cover data,(2)rationality assessment based on regional historical facts,(3)rationality assessment based on expertise,and(4)likelihood assessment based on the consistency of multiple datasets.These methods were illustrated through five case studies of credibility assessments of historical cropland cover data.This framework can also be applied in assessments of other land cover types,such as forest and grassland. | Xiuqi FANG Wanyi ZHAO Chengpeng ZHANG Diyang ZHANG Xueqiong WEI Weili QIU Yu YE | 2020 | Science China Earth Sciences2020，63，7： | 4 |
| 3 | A scoring system for prediction of early recurrence after liver resection for Barcelona Clinic Liver Cancer stage B hepatocellular carcinoma显示文摘 | Qian Honggang Wei Meng Qiu Hu Wu Jianhui Liu Bonan Lyu Ang Liu Qiao Li Chengpeng Leng Jiahua | 2014 | Chinese Medical Journal2014，，24： | 1 |
| 4 | Direct laser writing breaking diffraction barrier based on two-focus parallel peripheralphotoinhibition lithography显示文摘Direct laser writing(DLW)enables arbitrary three-dimensional nanofabrication.However,the diffraction limit poses a major obstacle for realizing nanometer-scale features.Furthermore,it is challenging to improve the fabrication efficiency using the currently prevalent single-focal-spot systems,which cannot perform high-throughput lithography.To overcome these challenges,a parallel peripheral-photoinhibition lithography system with a sub-40-nm two-dimensional feature size and a sub-20-nm suspended line width was developed in our study,based on two-photon polymerization DLW.The lithography efficiency of the developed system is twice that of conventional systems for both uniform and complex structures.The proposed system facilitates the realization of portable DLW with a higher resolution and throughput. | Dazhao Zhu Liang Xu Chenliang Ding Zhenyao Yang Yiwei Qiu Chun Cao Hongyang He Jiawei Chen Mengbo Tang Lanxin Zhan Xiaoyi Zhang Qiuyuan Sun Chengpeng Ma Zhen Wei Wenjie Liu Xiang Fu Cuifang Kuang Haifeng Li Xu Liu | 2022 | Advanced Photonics2022，4，6： | 1 |
| 5 | Mechanical Properties of Nano-CaCO_(3) and Basalt Fiber Reinforced Concrete:Experiments and Numerical Simulations显示文摘In this study,the compressive,split tensile,and flexural strengths of concrete with nano-CaCO_(3) only were compared with those of concrete with nano-CaCO_(3) and basalt fibers through field experiments,and the underlying mechanisms were analyzed by the Scanning Electron Microscope (SEM) techniques.On the mesoscale,a damage model of concrete was established based on the continuum progressive damage theory,which was used to investigate the influence of different lengths and contents of fibers on the mechanical properties of concrete.Then,the experimental and numerical simulation results were compared and analyzed to verify the feasibility of model.The results show that nano-CaCO_(3) can enhance the compressive strength of the concrete,with an optimal content of 2.0%.Adding basalt fibers into the nano-CaCO_(3) reinforced concrete may further enhance the compressive,split tensile,and flexural strengths of the concrete;however,the higher content of basalt fiber can not lead to higher performance of concrete.The optimal length and content of fiber are 6 mm and 0.20%,respectively.The SEM result shows that the aggregation of basalt fibers is detrimental to the mechanical properties of concrete.The numerical simulation results are in good agreement with the experimental results. | 刁目爽 任倩慧 SUN Xinjian ZHAO Yawei WEI Chengpeng | 2022 | Journal of Wuhan University of Technology(Materials Science)2022，37，5： | 0 |
| 6 | Fast Bulky Anion Conduction Enabled by Free Shuttling Phosphonium Cations显示文摘Highly conductive anion-exchange membranes(AEMs)are desirable for applications in various energy storage and conversion technologies.However,conventional AEMs with bulky HCO3-or Br-as counterion generally exhibit low conductivity because the covalent bonding restrains the tethered cationic group’s mobility and rotation.Here,we report an alternative polyrotaxane AEM with nontethered and free-shuttling phosphonium cation.As proved by temperature-dependent NMR,solid-state NMR,and molecular dynamics simulation,the phosphonium cation possesses a thermally trigged shuttling behavior,broader extension range,and greater mobility,thus accelerating the diffusion conduction of bulky anions.Owing to this striking feature,high HCO_(3)-conductivity of 105 mS cm^(-1) at 90℃ was obtained at a relatively lower ion-exchange capacity of 1.17 mmol g^(-1).This study provides a new concept for developing highly conductive anion-exchange membranes and will catalyze the exploration of new applications for polyrotaxanes in ion conduction processes. | Xiaolin Ge Yubin He Kaiyu Zhang Xian Liang Chengpeng Wei Muhammad A.Shehzad Wanjie Song Zijuan Ge Geng Li Weisheng Yu Liang Wu Tongwen Xu | 2022 | Research2022，，1： | 0 |
| 7 | Fast Bulky Anion Conduction Enabled by Free Shuttling Phosphonium Cations显示文摘Highly conductive anion-exchange membranes(AEMs)are desirable for applications in various energy storage and conversion technologies.However,conventional AEMs with bulky HCO_(3)^(-)or Br-as counterion generally exhibit low conductivity because the covalent bonding restrains the tethered cationic group’s mobility and rotation.Here,we report an alternative polyrotaxane AEM with nontethered and free-shuttling phosphonium cation.As proved by temperature-dependent NMR,solid-state NMR,and molecular dynamics simulation,the phosphonium cation possesses a thermally trigged shuttling behavior,broader extension range,and greater mobility,thus accelerating the diffusion conduction of bulky anions.Owing to this striking feature,high HCO_(3)^(-)conductivity of 105 mS cm^(-1)at 90℃ was obtained at a relatively lower ion-exchange capacity of 1.17 mmol g^(-1).This study provides a new concept for developing highly conductive anion-exchange membranes and will catalyze the exploration of new applications for polyrotaxanes in ion conduction processes. | Xiaolin Ge Yubin He Kaiyu Zhang Xian Liang Chengpeng Wei Muhammad A.Shehzad Wanjie Song Zijuan Ge Geng Li Weisheng Yu Liang Wu Tongwen Xu | 2021 | Research2021，，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员