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Energy & Environmental Materials 2023年第2期6卷 90-99页

作者： shuanglin wu Jiayi Shi Xiaolin Nie Yingmei Yao Feng Jiang Qufu Wei Fenglin Huang Key Laboratory of Eco-Textiles Ministry of EducationJiangnan UniversityWuxi 214122China Department of Wood Science University of British ColumbiaVancouver BC V6T 1Z4Canada

The“shuttle effect”of polysulfides hampers the commercialization of lithium-sulfur(Li-S)***,a thin molecular sieve film was decorated on the surface of an electrospun cellulose acetate(CA)membrane derived from recycled cigarette filters,where the truncated cone structureβ-cyclodextrin(β-CD)was selected as the building block to physically block and chemically trap polysulfides while simultaneously dramatically speeding up ion ***,on theβ-CD free side of the separator facing the cathode,graphite carbon(C)was sputtered as an upper current collector,which barely increases the *** benefits result in an initial discharge performance of 1378.24 mAh g^(−1) and long-term cycling stability of 863.78 mAh g^(−1) after 1000 cycles at 0.2 C for the battery with theβ-CD/CA/C separator,which is more than three times that of the PP separator after 500 ***,the funnel-type channel ofβ-CD generates a differential ionic fluid pressure on both sides,speeding up ion transport by up to 69%,and a 65.3%faster charging rate of 9484 mA g^(−1) was ***“funnel effect”of a separator is regarded as a novel and high-efficiency solution for fast charging of Li-S and other lithium secondary batteries.

关键词： cellulose acetate fast charging magnetron deposition separator trapping polysulfides

Effect of sound speed profile on the structure of long-range acoustic pulse

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Chinese Journal of Acoustics 2024年第1期43卷 64-81页

作者： wu shuanglin QIN Jixing LI Zhenglin wu Yushen ZHANG Renhe State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 School of Ocean Engineering and Technology Sun Yat-sen UniversityZhuhai 519000 Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082

The time arrival structure of acoustic pulse signals propagating in ocean waveguides is of great significance for underwater acoustic communication and navigation. Using the deep-sea sound propagation data from the experiments respectively conducted in the East Indian Ocean(EIO) and the South China Sea(SCS) with explosion sources near the sound channel axis(SCA), long-range transmission loss(TL) and time arrival structure of acoustic pulses for different sound speed profiles(SSPs) are compared. In the EIO environment, sound energy transmitting along the SCA is relatively large, and the corresponding signals arrive first, whereas signals propagating away from the SCA arrive late. In the full receiving depth, it shows a branch structure where the waveform near the SCA arrives earlier than other depths, which is totally different with the characteristics of the sound pulse in the SCS. Combined with the parametric mathematical model of deep-sea sound channel, the influence mechanism of SSP on the time arrival structure of long-range pulse propagation is theoretically analyzed, which well explains the phenomenon observed in the two experiments.

关键词： depths Indian sound

Experimental analysis of acoustic propagation and source localization based on the underwater acoustic glider in Eastern Indian Ocean

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Chinese Journal of Acoustics 2022年第3期41卷 195-211页

作者： wu Yushen LI Zhenglin QIN Jixing wu shuanglin WANG Guangxu State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of Sciences Beijing 100190 College of Physical Science University of Chinese Academy of Sciences Beijing 100049

In order to acquire hydrologic and acoustic information at the same time,the underwater glider is used as a synchro observing platform and an algorithm of source localization estimation based on the glider in deep water is *** hydrologic and acoustic data acquired by the glider in the Eastern Indian Ocean are used to analyze the self-noise of the glider and the characteristics of acoustics signal *** underwater track of the glider is updated by using underwater dead *** to the time delay of the received signals,the underwater sound source localization estimation is *** results indicate that the self-noise of the glider is quite close to the ambient noise at the no-motor *** sound transmission losses(TLs)of experiment and simulation are in great *** estimation results of underwater sound source localization are consistent with measurement and the estimation error is less than 5%.The glider loaded with self-contained hydrophones can get hydrologic and acoustic information at the same time,which is important for the acoustic propagation analysis and target localization.

关键词： underwater estimation propagation

The convergence of sound field in a South China Sea canyon

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Chinese Journal of Acoustics 2020年第2期39卷 164-175页

作者： ZHANG Qingqing LI Zhenglin QIN Jixing LI Wen wu shuanglin State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of Sciences Beijing 100190 University of Chinese Academy of Sciences Beijing 100049

The sound propagation characteristics in a canyon environment are analyzed using the data from the northern South China Sea. The experimental results show that the energy begins to bend to a deeper place with the depth change of the canyon and the sound transmission losses(TLs) reach the maximum near the center of the canyon due to the combined effect of the negative gradient sound speed profile and the seabed topography. As the sea become shallow gradually, the energy is concentrated due to the seabed reflection, thus the TLs reduce by over 20 d B compared with the TLs results got from the simple slope to the deep water environment. Moreover, when the convergence effects are less than the loss caused by diffusion,seabed reflection, etc. the TLs are minimized and then increase with an increase in *** the last segment, the gradual convergence of the energy is highlighted again, and the TLs decrease 10 d B when the water depth suddenly decreases from 850 m to 311 m within 8 ***, the convergence of sound field, which is caused by the topographic change in the canyon environment, is explained by the ray theory and the parabolic equation method.

关键词： seabed shallow topography

The characteristic of sound propagation in deep water and underwater source localization in the direct zone

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Chinese Journal of Acoustics 2019年第4期38卷 433-444页

作者： WANG Mengyuan LI Zhenglin wu shuanglin QIN Jixing YU Yanxin State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049

The multiple-path sound propagation in deep water is conducive to source localization of an underwater *** transmission losses(TLs) and broadband pulse multiple-path propagation characteristics from a deep receiver is analyzed by using the experimental data from deep water area in the South China Sea(SCS).The results indicate that the width of the direct zone near the bottom of 4300 m water depth is about 30 *** TLs in the direct zone near the bottom are much less than those in the shadow *** is meaningful for underwater sound source ***,the time delay between the direct path and the bottomsurface-reflected path for a receiver near the bottom decreases monotonically with the source *** to the linear relationship between the time delay of multipath and source range,a source localization method is presented to estimate the range of underwater *** experimental results show that the estimated ranges are consistent with the global position system(GPS) measurements,and the mean square error of the estimation results is less than 0.28 km.

关键词： underwater propagation sound

Porosity Formation and Evolution of the Deeply Buried Lower Triassic Feixianguan Formation, Puguang Gas Field, NE Sichuan Basin, China

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Open Journal of Geology 2013年第4期3卷 300-312页

作者： Xuefeng Zhang Tonglou Guo Bo Liu Xiaoyue Fu shuanglin wu Institute of Oil & Gas School of Earth and Space Sciences Peking University Beijing China

The deeply buried shoal dolomite reservoirs of the Lower Triassic Feixianguan Formation, giant Puguang Gas Field, NE Sichuan Basin, are exceptionally porous. The influences of diageneses on pore evolution are studied. Through petrologic investigation, diagenetic phases are divided into four stages, i.e., near-surface, pre-oil window, oil window, and gas window. The Adobe Photoshop system is used to quantify the rock texture components, porosity constitutions and the influences of diageneses on reservoir porosity. Porosity evolution curves are quantitatively recovered. The Feixianguan reservoir porosities are mainly created by early meteoric dissolution, dolomitization, and organic acids dissolution. Dissolution during deep burial is insignificant. Pores are formed in near-surface and pre-oil window stages and effectively preserved till present. This result may be of great significance to the further exploration of deeply buried carbonate reservoirs not only in NE Sichuan Basin, but also around the world.

关键词： Porosity Evolution Diagenesis Lower Triassic Feixianguan Formation Puguang Gas Field Sichuan Basin

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声速剖面对深海远程声脉冲结构的影响

声学学报 2023年第4期48卷 774-784页

作者：吴双林秦继兴李整林吴禹沈张仁和中国科学院声学研究所声场声信息国家重点实验室北京100190 中国科学院大学北京100190 中山大学海洋工程与技术学院珠海519000 南方海洋科学与工程广东省实验室珠海519082

利用东印度洋和南海海域进行的深海远程声传播实验数据,比较分析了声道轴附近深度发射的声信号在两个海域不同声速剖面结构下的远程传播损失和脉冲时间到达结构。通过对比观测发现,两海域的深海声传播损失特性存在一定的差异,声脉冲时... 详细信息

利用东印度洋和南海海域进行的深海远程声传播实验数据,比较分析了声道轴附近深度发射的声信号在两个海域不同声速剖面结构下的远程传播损失和脉冲时间到达结构。通过对比观测发现,两海域的深海声传播损失特性存在一定的差异,声脉冲时间到达结构差异性显著。首先,在东印度洋实验中观测到潜标垂直阵同一接收距离上,靠近声道轴传播的声能量较大,且声道轴附近声速较小但沿其传播的声信号却最先到达,而偏离声道轴传播的声信号延后到达,在整个接收深度上呈现出声道轴附近接收波形早于其他深度到达的分支结构,这与南海典型深海环境下的脉冲时间到达结构存在显著差异。其次,结合深海声道的参数化数学模型,分析了声速剖面对远程脉冲传播时间到达结构的影响机理,并理论解释了两个海域实验中观测到的脉冲声信号时间到达结构现象,其形成原因在于深海声道中决定声速剖面结构的声道轴系列参数的差异。该研究结果对通信声呐在不同海域深海远程环境下的应用具有一定的参考意义。

关键词：远程声传播深海声道声速剖面脉冲时间到达结构

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环糊精改性聚丙烯膜及其在锂硫电池中的应用

高分子材料科学与工程 2022年第1期38卷 153-158页

作者：姚莹梅武双林余彦婷黄锋林江南大学生态纺织教育部重点实验室江苏无锡214122

以聚丙烯(PP)为基底膜,利用常温等离子体对其进行亲水性改性,环糊精作为分子筛涂层对其进行修饰,以其作为锂硫电池隔膜,可实现对多硫化物的有效阻碍,提高锂硫电池比容量及循环稳定性。对修饰隔膜的表观形貌、孔隙率、电解液亲和性、对... 详细信息

以聚丙烯(PP)为基底膜,利用常温等离子体对其进行亲水性改性,环糊精作为分子筛涂层对其进行修饰,以其作为锂硫电池隔膜,可实现对多硫化物的有效阻碍,提高锂硫电池比容量及循环稳定性。对修饰隔膜的表观形貌、孔隙率、电解液亲和性、对多硫化物扩散的抑制效果,以及在锂硫电池中的电化学性能等进行了表征。结果显示,修饰隔膜的孔隙率达53.79%,高于商业隔膜58.02%。多硫化物扩散实验进一步表明,环糊精分子筛涂层修饰的隔膜可以有效抑制多硫化物的穿梭效应。改性隔膜在0.2C电流密度时,初始放电比容量达1275.89 mAh/g,200次循环后放电比容量达916.69mAh/g,显示出优异的电化学性能。

关键词：环糊精分子筛聚丙烯锂硫电池隔膜多硫化物

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水下声学滑翔机用于东印度洋声传播特性分析及声源估计

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声学学报 2021年第6期46卷 1102-1113页

作者：吴禹沈李整林秦继兴吴双林王光旭中国科学院声学研究所声场声信息国家重点实验室北京100190 中国科学院大学北京100049

常规实验方法无法同步获取深海大尺度声学和水文数据,水下滑翔机可作为同步观测平台解决该问题.首先利用在东印度洋北部海域水下滑翔机同步获取的声传播和水文实验数据,分析了水下滑翔机的自噪声谱级和实验海区声传播特性,然后推算并修... 详细信息

常规实验方法无法同步获取深海大尺度声学和水文数据,水下滑翔机可作为同步观测平台解决该问题.首先利用在东印度洋北部海域水下滑翔机同步获取的声传播和水文实验数据,分析了水下滑翔机的自噪声谱级和实验海区声传播特性,然后推算并修正了滑翔机水下运动轨迹,利用第一影区水下滑翔机接收声传播信号的脉冲多途到达时间差对声源进行测距与定深。潜标接收噪声与滑翔机自噪声谱级对比表明,水下滑翔机在海洋中无动力运动时的系统自噪声接近于潜标观测的海洋环境噪声。滑翔机实测的声传播损失与模型计算结果吻合较好,第一影区水下声源测距定深结果与实际位置较为一致,测距与定深的相对误差均小于5%。利用加载水听器的水下滑翔机可以实现水文环境数据与声学信号的同步观测,对深海声传播特性测量及定位算法研究具有重要意义。

关键词：到达时间差水下滑翔机海洋环境噪声同步观测声传播声学信号水下声源运动轨迹

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南海海域跨海沟环境的声场会聚特性

声学学报 2020年第4期45卷 458-465页

作者：张青青李整林秦继兴李文吴双林中国科学院声学研究所声场声信息国家重点实验室北京100190 中国科学院大学北京100049

利用南海北部海域的声传播实验数据分析了跨海沟条件下的声传播特性。结果表明:由于负梯度声速剖面和海底地形的共同作用,导致声能量在开始随着海沟深度变化向更深层位置上弯曲传播,传播损失在海沟中心位置附近达到最大。在海深逐渐变... 详细信息

利用南海北部海域的声传播实验数据分析了跨海沟条件下的声传播特性。结果表明:由于负梯度声速剖面和海底地形的共同作用,导致声能量在开始随着海沟深度变化向更深层位置上弯曲传播,传播损失在海沟中心位置附近达到最大。在海深逐渐变浅的距离上,由于海底反射使得声能量逐渐会聚,声传播损失比单纯陆坡变到深海环境下要减小20 dB以上。当会聚效果小于扩散和海底反射等引起的损失时,声传播损失达到最小,之后随着距离增大而增大;在海沟最后一段,当海深在8 km范围内从850 m突然变浅到311 m,声场能量逐渐会聚效果再次凸显,使得声传播损失减小10 dB。利用射线理论和抛物方程近似数值分析,解释了海沟环境下的由于地形变化引起的声场会聚传播特性。

关键词：海底地形射线理论深海环境海深南海海域声传播损失声能量地形变化