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| 1 | Spatial structure of valley economic development in the mountainous areas in Beijing显示文摘山谷经济是在被山谷开发的各种各样的人物定义的多山的区域开发的一个新模式,并且是区分为多山的区域开发的节俭的地理模式。在在山谷的不同多山的元素的分发的特殊空间联合关系是为山发展研究的新题目,并且如此的研究为研究和惯例两个都是有意义的。把简短探索基于关于多山的区域开发和追随者的长期的研究进涵义和山谷经济的空间组织进程,作者在北京多山的区域分析了山谷经济的开发的现在的状况,在北京多山的区域学习了特征和山谷经济的空间结构的变化的影响,并且最后建议了山谷经济的空间结构的合理安排山谷经济在新时代在北京多山的区域在发展和功能的转变起一个重要作用,这在这研究被考虑。第一,山谷经济没被行政边界构画出,并且它沿着主要交通线粗略地在多山的区域连接大多数村庄。因此,山谷经济能在多山的区域对发展施加积极影响,至少在象在多山的区域和农村、城市的区域的协调发展的工业结构的重新整理那样的方面。另外,在北京多山的区域的山谷经济在第二等的集中的一个空间组织阶段被发展,这被发现,它被节省资源的、生态的保护和工业优化描绘。因此,山谷经济的发展将在多山的区域对在生态的保护和经济开发之间的协作有用,并且将支持多山的区域的综合发展。在北京多山的区域的山谷经济的发展中的模式将在北京多山的区域的功能的角色的转变为决策提供基础,并且在另一方面,将在北京外面在多山的区域为研究介绍经验。 | ZHANG Yifeng JIA Dameng ZHANG Hongye TAN Jie SONG Siyu SUN Ruifeng | 2011 | Journal of Geographical Sciences2011，21，2： | 9 |
| 2 | Sensitivity and regionally proximal relation in minimal systems显示文摘A topological dynamical system is n-sensitive,if there is a positive constant such that in each non-empty open subset there are n distinct points whose iterates will be apart from the constant at least for a same moment.The properties of n-sensitivity in minimal systems are investigated.It turns out that a minimal system is n-sensitive if and only if the n-th regionally proximal relation Q_n contains a point whose coordinates are pairwise distinct.Moreover,the structure of a minimal system which is n-sensitive but not(n+1)-sensitive(n≥2)is determined. | SHAO Song YE XiangDong ZHANG RuiFeng | 2008 | Science China Mathematics2008，51，6： | 5 |
| 3 | Multi-innovation stochastic gradient parameter estimation for input nonlinear controlled autoregressive models显示文摘 | Yongsong Xiao Guanglei Song Yuwu Liao Ruifeng Ding | 2012 | International Journal of Control, Automation and Systems2012，，3： | 1 |
| 4 | Rock Types and Reservoir Characteristics of Shahejie Formation Marl in Shulu Sag, Jizhong Depression, Bohai Bay Basin显示文摘Due to the complicated lithology in the ES3 Member of the Shahejie Formation in the Shulu sag,Jizhong depression,it is difficult to classify the rock types and characterize the reservoirs at the marl intervals.In this paper,a four-element classification method has been proposed,and seven rock types have been identified by analyzing the mineral composition.The primary rock types are medium-high organic carbonate rocks and medium-high organic shaly-siliceous carbonate rocks.With the methods of field emission scanning electron microscopy,high-pressure mercury intrusion,nitrogen adsorption,and nano-CT,four types of reservoir spaces have been identified,including intra-granular pores,intergranular pores(inter-crystalline pores),organic pores,and micro-fractures.By combining the method of high-pressure mercury intrusion with the method of the nitrogen adsorption,the porosity of the marl has been measured,ranging from 0.73%to 5.39%.The distribution of the pore sizes is bimodal,and the pore types are dominated by micron pores.Through this study,it has been concluded that the sag area to the east of Well ST1H is the favorable area for the development of self-sourced and self-reservoired shale oil.According to the results of geochemical and reservoir analysis,the III Oil Group may have sweet spot layers. | Jingwei Cui Xuanjun Yuan Songtao Wu Ruifeng Zhang Song Jin Yang Li | 2021 | Journal of Earth Science2021，32，4： | 1 |
| 5 | Discharge rate consistency of each channel for UAV-based pneumatic granular fertilizer spreader显示文摘Unmanned aerial vehicles(UAVs)are widely being used to spread granular fertilizer in China.Granular fertilizer spreaders equipped with UAVs are mainly centrifugal disc-type and pneumatic.The multichannel pneumatic granular fertilizer spreaders(MPGFSs)have a banded fertilizer deposition distribution pattern,which are more suitable for variable rate fertilization with high precision requirement than the circular deposition distribution pattern of disc-type granular fertilizer spreaders(DGFSs).However,the existing MPGFS has the disadvantage of inconsistent discharge rate of each channel,which affects the uniformity of fertilization.In order to explore the causes of inconsistent discharge rate of each channel,the discrete element method(DEM)and bench test were performed to analysis the discharge process of the fluted roller fertilizing apparatus and distribution of fertilizer in axial direction of fluted roller.The computational fluid dynamics(CFD)was used to simulate the airflow field of pneumatic system to analyze the influence of airflow on the movement of fertilizer particles.The simulation results of the discharge process of the fluted roller fertilizing apparatus showed that the filling velocity at the axial ends of the fluted roller fertilizing apparatus was lower than that of the middle.The reason was that the filling capacity was weak near the wall.The simulated results of the airflow field without partitions showed that the airflow provided by the axial flow fan was rotational,and this caused the particles to move irregularly in the throat,resulting in inconsistency discharge rate of each channel.Based on the analysis of reasons of inconsistent discharge rate of each channel,a MPGFS with partitions in the throat was developed.The discharge rate bench tests were carried out to optimize the partition spacing parameters,and fertilization test was performed to test the performance of the improved MPGFS.The discharge rate test results showed better consistency with partition.The coefficient of variation(CV)of the discharge rate of each channel was 20.16%without the partition and 7.70%with the optimal partition.The fertilizer spreading uniformity bench test results shown that the CV of spreading uniformity of MPGFS without partitions was 15.32%,and that MPGFS with partitions was 8.69%.The partitions design was beneficial to improve the consistency of each channel discharge rate and the uniformity of fertilization.The finding can provide a strong reference to design the MPGFS. | Xunwei Wang Rui Jiang Zhiyan Zhou Cancan Song Xiwen Luo Ruifeng Bao Zichen Lyu Junhao Huang Jianqin Lin | 2023 | International Journal of Agricultural and Biological Engineering2023，16，4： | 1 |
| 6 | Enzymatic clickable functionalization of peptides via computationally engineered peptide amidase显示文摘Directed peptides C-terminal modification enabled by the engineered biomolecular catalyst-peptide amidase 12 B has been achieved via computational protein engineering. The engineered enzyme exhibits great promising potential in the C-terminal modification of opioid peptides using prop-2-yn-1-amine(PYA) or prop-2-en-l-amine(PEA) as the nucleophile. A variety of opioid peptides could be readily functionalized at the C-terminal chain in high yield in a mild and selective manner. Notably, modified opioid peptides bearing alkynyl moiety could be further functionalized through well-established click reaction. | Tong Zhu Lu Song Ruifeng Li Bian Wu | 2018 | Chinese Chemical Letters2018，29，7： | 0 |
| 7 | Synergy of I-Cl co-occupation on halogen-rich argyrodites and resultant dual-layer interface for advanced all-solid-state Li metal batteries显示文摘The(electro)chemical stability and Li dendrite suppression capability of sulfide solid electrolytes(SEs)need further improvement for developing all-solid-state Li batteries(ASSLBs).Here,we report advanced halogen-rich argyrodites via I and Cl co-occupation on the crystal lattice.Notably,a proper I content forms a single phase,whereas an excessive I causes precipitation of two argyrodite phases like a superlattice structure.The resultant synergistic effect of the optimized composition allows to gain high ionic conductivities at room temperature and-20℃,and enhances the(electro)chemical stability against Li and Li dendrite suppression capability.The Li|argyrodite interface is very sensitive to the ratio of I and Cl.A LiCl-and LiI-rich double-layer interface is observed from the cell using the SE with optimized composition,whereas too high I content forms only a single interface layer with a mixture of Lil and LiCl.This double-layer interface is found to effectively mitigate the Li/SE reaction.The proper designed argyrodite enables ASSLBs to achieve good electrochemical properties at a broad temperature range regardless of the electrode materials.This co-occupation strategy provides a novel exploration for advanced halogen-rich argyrodite system. | Han Yan Ruifeng Song Ruonan Xu Shulin Li Qiaoquan Lin Xinlin Yan Zhenyu Wang Chuang Yu Long Zhang | 2023 | Journal of Energy Chemistry2023，，11： | 0 |
| 8 | Direct observation of nodeless superconductivity and phonon modes in electron-doped copper oxide Sr_(1-X)Nd_(X)CuO_(2)显示文摘The microscopic understanding of high-temperature superconductivity in cuprates has been hindered by the apparent complexity of crystal structures in these materials.We used scanning tunneling microscopy and spectroscopy to study the electron-doped copper oxide compound Sr_(1-x)Nd_(x)CuO_(2),which has only bare cations separating the CuO_(2) planes and thus the simplest infinite-layer structure of all cuprate superconductors.Tunneling conductance spectra of the major CuO_(2) planes in the superconducting state reve aled direct evidence for a nodeless pairing gap,regardless of variation of its magnitude with the local doping of trivalent neodymium.Furthermore,three distinct bosonic modes are observed as multiple peak-dip-hump features outside the superconducting gaps and their respective energies depend little on the spatially varying gaps.As well as the bosonic modes,with energies identical to those of the external,bending and stretching phonons of copper oxides,our findings reveal the origin of the bosonic modes in lattice vibrations rather than spin excitations. | Jia-Qi Fan Xue-Qing Yu Fang-Jun Cheng Heng Wang Ruifeng Wang Xiaobing Ma Xiao-Peng Hu Ding Zhang Xu-Cun Ma Qi-Kun Xue Can-Li Song | 2022 | National Science Review2022，9，4： | 0 |
| 9 | Variation and relationship between soil moisture and environmental factors in the source region of the Yangtze River from 2005 to 2016显示文摘This study analyzed soil moisture,soil erosion,and vegetation in the source region of the Yangtze River from 2005 to 2016.We found that soil moisture showed an increasing trend from 2005 to 2009 but decreased from 2009 to 2016.The surface soil moisture was severely affected by seasonal changes in the source region of the Yangtze River,especially in the soil from 0 to 40 cm.However,seasonal variation of soil moisture deeper than 40 cm was different from that in the upper layer.Soil moisture below 40 cm wasn't affected by the seasonal variation.Soil moisture from 0 to 50 cm and the average thickness of wind deposition showed a positive correlation in the study area from 2005 to 2016.For environmental protection in the source region of the Yangtze River,wind deposition played a role in water retention.Similarly,a positive correlation also existed between the average thickness of wind erosion and soil moisture.Deep-soil moisture was the key factor for vegetation structure on the Qinghai?Tibet Plateau.The results are also helpful for further understanding the variation of soil moisture on the Tibetan Plateau and providing a scientific basis for effectively protecting and controlling the ecological environment in the future. | LingLing Song ZongJie Li Qing Tian LieFu Wang Jing He RuiFeng Yuan Juan Gui BaiJuan Zhang YueMin Lv | 2019 | Research in Cold and Arid Regions2019，11，3： | 0 |
| 10 | Design of a 12GHz SiGe Bipolar LNA显示文摘 | SONG Ruifeng LIAO Huailin HUANG Ru WANG Yangyuan | 2007 | Chinese Journal of Electronics2007，16，2： | 0 |
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