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盘锦湿地地面沉降历史过程研究

湿地科学 2016年第5期14卷 607-610页

作者：孙岐发田辉张勤杨成生王帅马诗敏都基众李旭光中国地质调查局沈阳地质调查中心沈阳地质矿产研究所辽宁沈阳110034 长安大学陕西西安710064 辽宁工程勘察设计院辽宁锦州121000

采用地形图对比法、精密水准观测法和合成孔径雷达干涉测量技术（InSAR解译法）,研究不同时段盘锦湿地的地面沉降历史和现状。结果表明,盘锦湿地泵站作废和灌渠无法正常引水等是地面沉降所致。1956～1984年,盘锦湿地地面最大平均沉降速... 详细信息

采用地形图对比法、精密水准观测法和合成孔径雷达干涉测量技术（InSAR解译法）,研究不同时段盘锦湿地的地面沉降历史和现状。结果表明,盘锦湿地泵站作废和灌渠无法正常引水等是地面沉降所致。1956～1984年,盘锦湿地地面最大平均沉降速率为3.21 mm/a,沉降程度低,处于稳定阶段;1982～1994年,盘锦湿地地面最大平均沉降速率为10.41 mm/a,沉降程度较低;1994年以后,盘锦湿地地面最大平均沉降速率远超过80mm/a,局部地区最大平均沉降速率达到240 mm/a,地面沉降程度很高,破坏了湿地环境。

关键词：盘锦湿地地面沉降合成孔径雷达干涉测量水准点地形图比对

Mineral structure and crystal morphologies of high-iron hydrargillite

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International Journal of Minerals,Metallurgy and Materials 2018年第5期25卷 505-514页

作者： hui-bin yang Feng-qin Liu Xiao-lin Pan Hangzhou Yinsheng Enterprise Management Co. Ltd. School of Metallurgical and Ecological Engineering University of Science and Technology Beijing School of Metallurgy Northeastern University

Various characterization methods, including scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, Brunauer–Emmett–Teller surface-area measurements, thermogravimetry–differential scanning calorimetry, X-ray diffraction, and infrared spectroscopy, were used to study the mineral structure and surface characteristics of high-iron hydrargillite. Gibbsite, goethite, and hematite were found to be the main mineral components of hydrargillite, whereas the goethite and hematite were closely clad to the surface of the multilayer gibbsite crystals. Compared with the synthetic gibbsite, the hydrargillite contained more structural micropores generated by the mineral evolution during the mineralization process. The gibbsite in hydrargillite contained less crystal water compared with the synthetic gibbsite, and it was a typical polymorphic structure. The isomorphous substitution of Al and Fe was observed in goethite. The dissolution-controlling step of hydrargillite was the ionic diffusion speed because of the goethite and hematite that closely covered and encapsulated the gibbsite crystals.

关键词： hydrargillite goethite gibbsite mineral structure crystal morphologies

Lagrangian analysis of the fluid transport induced by the interaction of two co-axial co-rotating vortex rings

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Journal of Hydrodynamics 2020年第6期32卷 1080-1090页

作者： Hai-yan Lin yang Xiang Su-yang qin hui Xu Hong Liu J.C.wu center for aerodynamics school of aeronautics and astronauticsshanghai jiao tong universityshanghai200240china

In this paper,the fluid transport in the interaction of two co-axial co-rotating vortex rings are *** rings are generated using the piston-cylinder apparatus,and the resulting velocity fields are measured using digital particle image *** interaction process is analysed by means of vorticity contour,as well by investigation of the Lagrangian coherent structures(LCSs)defined by the ridges of the finite-time Lyapunov exponent(FTLE).Experimental results demonstrate that two types of vortex interaction are identified,namely strong and weak interactions,*** the strong interaction,the Lagrangian boundaries of the two vortex rings are merged together and form a flux window for fluid *** weak interaction,only the Lagrangian drift induced by the motion of the front vortex ring is observed and affects the Lagrangian boundary of the rear vortex ***,the fluids transported in the strong interaction carry considerable momentum but no *** contrast,there are nearly no fluxes occurring in the weak *** tracking the variations of circulation and impulse occupied by the separated regions distinguished by the LCSs,it is found that the circulation nearly has no change,but the impulse occupied by vortex core region has significant *** the strong interaction,the impulse of rear vortex ring decreases but the impulse of the front vortex ring *** on the impulse law,it is speculated that the fluid force generated by the formation of the rear vortex rings can be ***,the strong interaction between wake vortices can actually improve the propulsive efficiency of the biological systems by operating the formation of large-scale vortices.

关键词： Vortex rings Lagranagian coherent structures(LCSs) fluid transport

云芝糖肽下调脂多糖诱导的小鼠巨噬细胞炎症性因子

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中国新药与临床杂志 2010年第4期29卷 306-309页

作者：任文智杨晓彤马伟超冯慧琴杨明俊杨庆尧董莎莎上海师范大学微生物与免疫学研究所上海200234 上海芝草生物技术有限公司上海200234

目的探讨云芝糖肽(PSP)对脂多糖(LPS)诱导的炎症性因子产生的影响及其相关机制。方法小鼠单核巨噬细胞Raw 264.7常规培养,并分为模型组(加入1 mg·L-1 LPS)、PSP组(25 mg·L-1PSP预孵1 h后加入1 mg·L-1 LPS)和正常对照组。分组后细胞... 详细信息

目的探讨云芝糖肽(PSP)对脂多糖(LPS)诱导的炎症性因子产生的影响及其相关机制。方法小鼠单核巨噬细胞Raw 264.7常规培养,并分为模型组(加入1 mg·L-1 LPS)、PSP组(25 mg·L-1PSP预孵1 h后加入1 mg·L-1 LPS)和正常对照组。分组后细胞继续培养24 h,光镜观察各组细胞的形态变化,Griess试剂检测一氧化氮(NO)生成量,ELISA法检测花生四烯酸2(PGE2)和白细胞介素-1β(IL-1β)的含量,Western blotting方法检测诱导型一氧化氮合酶(iNOS)和选择性环氧合酶-2(COX-2)的表达,流式细胞术检测PSP对LPS-FITC与各组细胞结合后的荧光强度变化。结果光镜观察显示,模型组大量细胞呈过度激活形态,PSP组细胞的伪足和胞浆内颗粒物的明显较少。与模型组相比,PSP组的NO、PGE2和IL-1β含量显著减少(P<0.05或P<0.01),iNOS和COX-2的高表达显著降低(P<0.01)。PSP组结合到Raw 264.7细胞上的FITC-LPS量减少,细胞平均荧光强度从2.1±s 0.4下降到1.20±0.25。结论PSP能干扰LPS与巨噬细胞的结合,从而减少LPS诱导产生的炎症介质,具有一定的抗炎效果。

关键词：云芝糖肽脂多糖类巨噬细胞炎症

City-Bus-Route Demand-based Efficient Coupling Driving Control for Parallel Plug-in Hybrid Electric Bus

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Chinese Journal of Mechanical Engineering 2018年第3期31卷 168-178页

作者： qin-Pu Wang Chao yang Ya-hui Liu Yuan-Bo Zhang Zhongtong Bus Hold Co. Ltd. State Key Laboratory of Automotive Safety and Energy Tsinghua University

Recently,plug?in hybrid electric bus has been one of the energy?e cient solutions for urban transportation. However,the current vehicle e ciency is far from optimum,because the unpredicted external driving conditions are di cult to be obtained in advance. How to further explore its fuel?saving potential under the complicated city bus driving cycles through an e cient control strategy is still a hot research issue in both academic and engineering area. To realize an e cient coupling driving operation of the hybrid powertrain,a novel coupling driving control strategy for plug?in hybrid electric bus is presented. Combined with the typical feature of a city?bus?route,the fuzzy logic inference is employed to quantify the driving intention,and then to determine the coupling driving mode and the gear?shifting strategy. Considering the response deviation problem in the execution layer,an adaptive robust controller for electric machine is designed to respond to the transient torque demand,and instantaneously compensate the response delay and the engine torque fluctuation. The simulations and hard?in?loop tests with the actual data of two typical driving conditions from the real?world city?bus?route are carried out,and the results demonstrate that the pro?posed method could guarantee the hybrid powertrain to track the actual torque demand with 10.4% fuel economy improvement. The optimal fuel economy can be obtained through the optimal combination of working modes. The fuel economy of plug?in hybrid electric bus can be significantly improved by the proposed control scheme without loss of drivability.

关键词： Hybrid electric vehicle Single?shaft parallel electromechanical powertrain Coupling driving mode Adaptive robust control

Attenuation of arsenic in a karst subterranean stream and correlation with geochemical factors: A case study at Lihu,South China

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Journal of Environmental Sciences 2014年第11期26卷 2222-2230页

作者： Liankai Zhang hui yang Jiansheng Tang Xiaoqun qin Au Yik Yu Institute of Karst Geology Chinese Academy of Geological Sciences Karst Dynamics Laboratory Ministry of Land and Resources and Guangxi Zhuang Autonomous Region

Arsenic （As） pollutants generated by human activities in karst areas flow into subterranean streams and contaminate groundwater easily because of the unique hydrogeological characteristics of karst areas. To elucidate the reaction mechanisms of arsenic in karst subterranean streams, physical-chemical analysis was conducted by an inductively coupled plasma mass spectrometer and an X-ray fluorescence spectrometer. The results show that inorganic species account for most of the total arsenic, whereas organic arsenic is not detected or occurs in infinitesimal amounts. As（III） accounts for 51.0% ± 9.9% of the total inorganic arsenic. Arsenic attenuation occurs and the attenuation rates of total As, As（III） and As（V） in the Lihu subterranean stream are 51%, 36% and 59%, respectively. To fully explain the main geochemical factors influencing arsenic attenuation, SPSS 13.0 and CANOCO 4.5 bundled with CanoDraw for Windows were used for simple statistical analysis and redundancy analysis （RDA）. Eight main factors, i.e., sediment iron （SFe）, sediment aluminum （SAI）, sediment calcium （SCa）, sediment organic matter （SOM）, sediment manganese （SMn）, water calcium （WCa^2＋）, water magnesium （WMg^2＋）, and water bicarbonate ion （WILCOX） were extracted from thirteen indicators. Their impacts on arsenic content rank as： SFe〉SCa〉WCa^2＋〉SAl〉wHCO3^-〉SMn〉SOM〉WMg^2＋. Of these factors, SFe, SAl, SCa, SOM, SMn, WMg^2＋ and WCa＆2＋ promote arsenic attenuation, whereas WHCO3^- inhibits it. Further investigation revealed that the redox potential （Eh） and pH are adverse to arsenic removal. The dramatic distinction between karst and non-karst terrain is that calcium and bicarbonate are the primary factors influencing arsenic migration in karst areas due to the high calcium concentration and alkalinity of karst water.

关键词： Karst subterranean stream Sediment Arsenic Geochemical factors Redundancy analysis

Nutrients regeneration pathway, release potential, transformation pattern and algal utilization strategies jointly drove cyanobacterial growth and their succession

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Journal of Environmental Sciences 2021年第5期33卷 255-267页

作者： hui Li Chunlei Song Liu yang Hangdao qin Xiuyun Cao Yiyong Zhou College of Material and Chemical Engineering TongRen UniversityTongren 554300China State key laboratory of Freshwater Ecology and Biotechnology Key laboratory of Algal BiologyInstitute of HydrobiologyChinese Academy of SciencesWuhan 430072China College of Chemistry and Chemical Engineering Neijiang Normal UniversityNeijiang 641100China

In order to better understand the contribution of nutrients regeneration pathway, release potential and transformation pattern to cyanobacterial growth and succession, 7 sampling sites in Lake Chaohu with different bloom degree were studied every two months from February to November 2018. The carbon, nitrogen(N) and phosphorus(P) forms or fractions in surface, interstitial water and sediments as well as extracellular enzymatic activities, P sorption, specific microbial abundance and community composition in sediments were analyzed. P regeneration pathway was dominated by iron-bound P desorption and phosphorus-solubilizing bacteria solubilization in severe-bloom and slight-bloom area respectively, which both resulted in high soluble reactive phosphorus(SRP) accumulation in interstitial water. However, in severe-bloom area, higher P release potential caused the strong P release and algal growth, compared to slight-bloom area. In spring, P limitation and N selective assimilation of Dolichospermum facilitated nitrate accumulation in surface water, which provided enough N source for the initiation of Microcystis bloom. In summer, the accumulated organic N in Dolichospermum cells during its bloom was re-mineralized as ammonium to replenish N source for the sustainable development of Microcystis bloom. Furthermore, SRP continuous release led to the replacement of Dolichospermum by Microcystis with the advantage of P quick utilization, transport and storage. Taken together, the succession from Dolichospermum to Microcystis was due to both the different forms of N and P in water column mediated by different regeneration and transformation pathways as well as release potential, and algal N and P utilization strategies.

关键词： Lake Chaohu Sediment Phosphorus Nitrogen Cyanobacteria bloom

Captioning Videos Using Large-Scale Image Corpus

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Journal of Computer Science & Technology 2017年第3期32卷 480-493页

作者： Xiao-Yu Du yang yang Liu yang Fu-Min Shen Zhi-Guang qin Jin-hui Tang School of Information and Software Engineering University of Electronic Science and Technology of China Chengdu 610054 China School of Software Engineering Chengdu University of Information Technology Chengdu 610225 China Center for Future Media University of Electronic Science and Technology of China Chengdu 611731 China School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China Sichuan University West China Hospital of Stomatology Chengdu 610041 China School of Computer Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China

Video captioning is the task of assigning complex high-level semantic descriptions （e.g., sentences or paragraphs） to video data. Different from previous video analysis techniques such as video annotation, video event detection and action recognition, video captioning is much closer to human cognition with smaller semantic gap. However, the scarcity of captioned video data severely limits the development of video captioning. In this paper, we propose a novel video captioning approach to describe videos by leveraging freely-available image corpus with abundant literal knowledge. There are two key aspects of our approach： 1） effective integration strategy bridging videos and images, and 2） high efficiency in handling ever-increasing training data. To achieve these goals, we adopt sophisticated visual hashing techniques to efficiently index and search large-scale images for relevant captions, which is of high extensibility to evolving data and the corresponding semantics. Extensive experimental results on various real-world visual datasets show the effectiveness of our approach with different hashing techniques, e.g., LSH （locality-sensitive hashing）, PCA-ITQ （principle component analysis iterative quantization） and supervised discrete hashing, as compared with the state-of-the-art methods. It is worth noting that the empirical computational cost of our approach is much lower than that of an existing method, i.e., it takes 1/256 of the memory requirement and 1/64 of the time cost of the method of Devlin et al.

关键词： video captioning hashing image captioning

Design, synthesis and in vitro evaluation of phenylbenzamidine derivatives as SSRIs

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Chinese Chemical Letters 2007年第7期18卷 814-816页

作者： Jing yang Xiaofang Wang hui Wen Fang qin Guang Zhong yang Institute of Materia Medica Peking Union Medical College and Chinese Academy of Medical Science Beijing 100050 China

A series of phenylbenzamidine analogs were synthesized and tested for their biological activities of inhibiting the reuptake of 5-HT. All of them were new compounds, and their structures were confirmed by 1HNMR, MS an... 详细信息

关键词： SSRIs Phenylbenzamidine XRD