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| 1 | Experimental measurement of the electrical conductivity of single crystal olivine at high temperature and high pressure under different oxygen fugacities显示文摘At 1.0-4.0 GPa and 1123-1473 K and under oxygen fugacity-controlled conditions (Ni + NiO, Fe + Fe3O4, Fe + FeO and Mo+ M0O2 buffers), a YJ-3000t Model six-anvil solid high-pressure apparatus and a Sarltron-1260 Impedance/Gain-Phase analyzer were employed to conduct an in situ measurement of the electrical conductivity of single crystal olivine. Experimental results showed that: (1) within the range of experimentally selected frequencies (103-106 Hz), the electrical conductivity of the sample is of great dependence on the frequency; (2) with the rise of temperature ( T), the electrical conductivity (σ) will increase, and the Arrenhius linear relationship is established between lgσ and 1/T; (3) under the control of oxygen buffer Fe+ Fe3O4, with the rise of pressure, the electrical conductivity tends to decrease whereas the activation enthalpy and independent-of-temperature preexponential factor tend to increase, with the activation energy and activation volume of the sample estimated at (1. 25 ± 0.08) eV and (0.105 ±0.025) cm3/mol, respectively; (4) under given pressure and temperature conditions, the electrical conductivity tends to increase whereas the activation energy tends to decrease with increasing oxygen fugacity; and ( 5) the mechanism of electrical conduction of small polarons can provide insight into the behavior of electrical conduction of olivine under high pressure and high temperature. | DAI Lidong LI Heping LIU Congqiang CUI Tongdi SHAN Shuangming YANG Changjun LIU Qingyou DENG Heming | 2006 | Progress in Natural Science:Materials International2006，16，4： | 9 |
| 2 | Experimental Study on the Electrical Conductivity of Orthopyroxene at High Temperature and High Pressure under Different Oxygen Fugacities显示文摘At presure 1.0–4.0 GPa and temperature 1073–1423 K and under oxygen partial pressure conditions, a YJ-3000t multi-anvil solid high-pressure apparatus and Sarltron-1260 Impedance/Gain-Phase analyzer were employed toconduct an in-situ measurement of the electrical conductivity of orthopyroxene. The buffering reagents consist of Ni+NiO,Fe+Fe3O4, Fe+FeO and Mo+MoO2 in order to control the environmental oxygen fugacity. Experimental results made clearthat: (1) within the measuring frequency range from 10? to 106 Hz, the complex impedance (R) is of intensive dependence 1on the frequency; (2) The electrical conductivity (σ) tends to increase along to the rise of temperature (T), and Log σ vs. 1/T fit the Arrenhius linear relations; (3) Under the control of oxygen buffer Fe+Fe3O4, with the rise of pressure, theactivation enthalpy tends to increase whereas the electrical conductivity tends to decrease. The activation energy andactivation volume of the main current carriers of orthopyroxene have been obtained, which are (1.715±0.035) eV and (0.03±0.01) cm3/mol, respectively; (4) Under given pressure and temperature, the electrical conductivity tends to increase withincreasing oxygen fugacity, while under given pressure the activation enthalpy tends to decrease with increasing oxygenfugacity; and (5) The sample’s small polarons mechanism has provided a reasonable explanations to the conductionbehavior at high temperature and high pressure. | DAI Lidong LI Heping LIU Congqiang SHAN Shuangming CUI Tongdi SU Genli | 2005 | Acta Geologica Sinica(English Edition)2005，79，6： | 4 |
| 3 | Deep Unfolding for Cooperative Rate Splitting Multiple Access in Hybrid Satellite Terrestrial Networks显示文摘Rate splitting multiple access(RSMA)has shown great potentials for the next generation communication systems.In this work,we consider a two-user system in hybrid satellite terrestrial network(HSTN)where one of them is heavily shadowed and the other uses cooperative RSMA to improve the transmission quality.The non-convex weighted sum rate(WSR)problem formulated based on this model is usually optimized by computational burdened weighted minimum mean square error(WMMSE)algorithm.We propose to apply deep unfolding to solve the optimization problem,which maps WMMSE iterations into a layer-wise network and could achieve better performance within limited iterations.We also incorporate momentum accelerated projection gradient descent(PGD)algorithm to circumvent the complicated operations in WMMSE that are not amenable for unfolding and mapping.The momentum and step size in deep unfolding network are selected as trainable parameters for training.As shown in the simulation results,deep unfolding scheme has WSR and convergence speed advantages over original WMMSE algorithm. | Qingmiao Zhang Lidong Zhu Shan Jiang Xiaogang Tang | 2022 | China Communications2022，19，7： | 1 |
| 4 | Apoptosis and autophagy control cell proliferation in the dentate gyrus following hippocampal lesion显示文摘Brain injuries often result in the promotion of cell proliferation in the hippocampal dentate gyrus(DG),but the number of newborn cells declines with time.However,the cause of this decline remains poorly understood.Elucidation of the fate of these newborn cells will further the understanding of the pathological process and treatment of brain injury.In the present study,the number of newborn cells was quantitatively analyzed using an unbiased stereological method following hippocampal lesion by kainic acid,in combination with detection of apoptosis and autophagy.Results revealed that hippocampal lesion resulted in a significantly increased number of 5-bromo-2-deoxyuridine(BrdU)-positive cells in the DG,which subsequently decreased with time.BrdU/cleaved caspase-3 double-labeled cells were detected in the granular cell layer and hilus of DG.However,expressions of LC3-II,Beclin 1,and p53 were upregulated,and pro-caspase-3 and Bcl-2 were downregulated.Results indicated that hippocampal lesion in adult rats resulted in significant cell proliferation in the DG,which subsequently reduced with time.In addition,results suggested that apoptosis and autophagic processes could regulate cell proliferation in the DG following hippocampal lesion. | Ju Zhou Wei Peng Qi Zhu Shan Gong Lidong Shan Tadashi Hisamitsu Shiyu Guo Xinghong Jiang | 2010 | Neural Regeneration Research2010，5，20： | 0 |
| 5 | Introduction of N,N’-disulfonylhydrazines as new sulfonylating reagents for highly efficient synthesis of(E)-β-iodovinyl arenesulfones under mild conditions显示文摘N,N’-Disulfonylhydrazines have been proven to be the most reactive precursors of the sulfonyl radicals among all types of sulfonyl substituted hydrazines as early as half a century ago.However,the sulfonyl radicals generated from these compounds have not been used in organic synthesis except the simple selfdimerization synthesis of disulfones controlled by the'solvent-cage-effects'.In this article,N,N’-disulfonylhydrazines were introduced as new sulfonylating reagents and their combinations with NIS were disclosed as new iodosulfonylating reagents of allcynes.Finally,a highly efficient method for the synthesis of(E)-β-iodovinyl arenesulfones was developed by mixing an alkyne,a N,N’-disulfonylhydrazine and NIS in aqueous THF at room temperature for 5 min. | Dongping Luo Lin Min Weiping Zheng Lidong Shan Xinyan Wang Yuefei Hu | 2020 | Chinese Chemical Letters2020，31，7： | 0 |
| 6 | Grain Boundary Conductivities of Peridotite at High Temperature and High Pressure显示文摘The grain boundary conductivities of dry synthetic peridotite are conducted by virtue of YJ-3000t multi-anvil press and Solartron-1260 Impedance /Gain-phase Analyzer at conditions of 4.0 GPa, 1373 K and frequency ranging from 10-2 to 106 Hz. The Fe2O3+Fe3O4,Ni+NiO,Fe+Fe3O4,Fe+FeO and Mo+MoO2 solid buffers are adopted to adjust | Lidong Dai~1,Heping Li~1,Haiying Hu~(1,2),Shuangming Shan~1 1.Laboratory for Study of the Earth’s Interior and Geofluids,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China. 2.Graduate School of the Chinese Academy of Sciences,Beijing 100080,China | 2009 | 地学前缘2009，16，S1： | 0 |
| 7 | Energy-Efficient Traffic Offloading for RSMA-Based Hybrid Satellite Terrestrial Networks with Deep Reinforcement Learning显示文摘As the demands of massive connections and vast coverage rapidly grow in the next wireless communication networks, rate splitting multiple access(RSMA) is considered to be the new promising access scheme since it can provide higher efficiency with limited spectrum resources. In this paper, combining spectrum splitting with rate splitting, we propose to allocate resources with traffic offloading in hybrid satellite terrestrial networks. A novel deep reinforcement learning method is adopted to solve this challenging non-convex problem. However, the neverending learning process could prohibit its practical implementation. Therefore, we introduce the switch mechanism to avoid unnecessary learning. Additionally, the QoS constraint in the scheme can rule out unsuccessful transmission. The simulation results validates the energy efficiency performance and the convergence speed of the proposed algorithm. | Qingmiao Zhang Lidong Zhu Yanyan Chen Shan Jiang | 2024 | China Communications2024，21，2： | 0 |
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