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Study on the Geo-Environmental Evolution of the Laolonggou Lagoon Under the Impacts of the Caofeidian Reclamation Project in Hebei Province

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Journal of Ocean University of China 2020年第5期19卷 1062-1072页

作者： yin cong YE Siyuan FENG Xiuli yin Yanhong Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education and College of Marine GeosciencesOcean University of ChinaQingdao 266100China Key Laboratory of Coastal Wetland Biogeosciences China Geological SurveyQingdao 266071China North China Sea Bureau Ministry of Natural ResourcesQingdao 266033China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China

The Caofeidian Reclamation Project has been the biggest reclamation project in China so far, in which 310 km^2 sea areas were reclaimed along the coast of Hebei Province, and it also bring about many problems and defects for large reclaiming area. The study focuses on the influences of the engineering exerted on evolution of the Laolonggou Lagoon with the methods of topographical measurement and surface sediment analysis. The results demonstrate that the topographical changes in the Laolonggou Lagoon had been controlled obviously by the engineering at three stages. Besides, blocking and reopening of the shoal tidal channel also affected the geological environment of the lagoon area. In the aspect of topographical change, the Laolonggou Inlet first experienced deposition after the shoal tidal channel was blocked, followed by short-time eroding for quarrying and cofferdam construction in the east, then depositing slowly after the reclaiming activity ceased, and finally eroding after the shoal tidal channel was reopened. The project, particularly cofferdam construction led to the movement of the Laolonggou Inlet axis from west to east for 50 – 100 m. In the aspect of sediment variation, the reclamation project and hydrodynamic change resulted in the variation in compositions and distribution pattern. The western lagoon area has become land mainly constituted by silt, while the sediments in the eastern area have turned finer in size. After the shoal tidal channel was reopened, the current velocity in the Laolonggou Inlet has been enhanced, making the sediments at the bottom become coarser. The sediments around the Caofeidian foreland went through a process of changing in grain size from fine to coarse and back to fine again, and the sediments are mainly constituted by silt at present.

关键词： Laolonggou Lagoon Inlet topographical evolution Caofeidian Reclamation Project shoal tidal channel

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Morphology Engineering for Covalent Organic Frameworks (COFs) by Surfactant Mediation and Acid Adjustment

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Chinese Journal of Polymer Science 2022年第4期40卷 338-344页

作者： Guang-Hui Yang Zhe Zhang cong-cong yin Xian-Song Shi Yong Wang State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

Two-dimensional covalent organic frameworks(COFs)with specific morphologies including nanofibers and nanoplates are highly desired in both nanoscience research and practical *** far,however,morphology engineering for COFs remains challenging because the mechanism underlying the morphology formation and evolution of COFs is not well ***,we propose a strategy of surfactant mediation coupled with acid adjustment to engineer the morphology of aβ-ketoenamine-linked COF,TpPa,during solvothermal *** surfactants function as stabilizers that can encapsulate monomers and prepolymers to create micelles,enabling the formation of fiber-like and plate-like morphologies of TpPa rather than irregularly shaped *** is also found that acetic acid is important in regulating such morphologies,as the amino groups inside the prepolymers can be precisely protonated by acid adjustment,leading to an inhibited ripening process for the creation of specific *** from the synergistic enhancement of surfactant mediation and acid adjustment,TpPa nanofibers with a diameter down to~20 nm along with a length of up to a few microns and TpPa nanoplates with a thickness of~18 nm are *** work sheds light on the mechanism underlying the morphology formation and evolution of TpPa,providing some guidance for exquisite control over the growth of COFs,which is of great significance for their practical applications.

关键词： Covalent organic frameworks(COFs) Morphology engineering Surfactants Nanofibers Nanoplates

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Modeling and analysis of nano-sized GMRs based on Co,NiFe and Ni materials

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Science China(Information Sciences) 2014年第2期57卷 216-229页

作者： yin cong JIA Ze MA WeiChao REN TianLing Institute of Microelectronics Tsinghua National Laboratory for Information Science and TechnologyTsinghua University

Magnetic simulation method is introduced to analyze giant magnetoresistances(GMRs)in nanoscale for nano-sized biosensors.A spin valve model with special gridding corresponding to the exchange interaction length is proposed to study the influence of easy axes,exchange coefcients,pinning fields and feature widths on magnetization reversals and hysteresis characteristics of nano-sized GMRs with diferent pinned layer and free layer materials of Co,NiFe and *** switching field is found to be almost linear with the pinning field and decrease with the absolute exchange coefcients and the feature widths for the nano-sized *** increase rate of each depends on the spin valve *** investigations into variations of the magnetization distribution reveal that the initial magnetization distribution and the magnetization reversal mode depend greatly on easy axes and materials The dependence on easy axes based mainly on the magnetocrystalline anisotropy is illustrated in detail.

关键词： nano-sized spin valve magnetization reversal switching field hysteresis antiferromagnetic coupling

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Magnetoresistive behavior and magnetization reversal of NiFe/Cu/CoFe/IrMn spin valve GMRs in nanoscale

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International Journal of Minerals,Metallurgy and Materials 2013年第7期20卷 700-704页

作者： cong yin Ze Jia Wei-chao Ma Tian-ling Ren Institute of Microelectronics & Tsinghua National Laboratory for Information Science and Technology Tsinghua University

The magnetoresistance behavior and the magnetization reversal mode of NiFe/Cu/CoFe/IrMn spin valve giant magnetoresistance （SV-GMR） in nanoscale were investigated experimentally and theoretically by nanosized magnetic simulation methods. Based on the Landau-Lifshitz-Gilbert equation, a model with a special gridding was proposed to calculate the giant magnetoresistance ratio （MR） and investigate the magnetization reversal mode. The relationship between MR and the external magnetic field was obtained and analyzed. Studies into the variation of the magnetization distribution reveal that the magnetization reversal mode, that is, the jump variation mode for NiFe/Cu/CoFe/IrMn, depends greatly on the antiferromagnetic coupling behavior between the pinned layer and the antiferromagnetic layer. It is also found that the switching field is almost linear with the exchange coefficient.

关键词： giant magnetoresistance (GMR) spin valves nanoscale magnetization reversal

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Experimental Investigation on Local Behaviors of PEMFC with Segmented Cell

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Automotive Innovation 2021年第2期4卷 165-175页

作者： cong yin Yan Gao Kai Li Yating Song Hao Tang School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 610023China Hydrogen and Fuel Cell Institute University of Electronic Science and Technology of ChinaChengdu 610023China

When designing a cell stack and developing an operational strategy for proton exchange membrane fuel cell,it is critical to characterize the local current,water and *** measure distributions of current density,relative humidity and temperature for both anode and cathode simultaneously along the straight parallel flow channels,this paper uses a segmented tool based on the multilayered printed circuit board flow field plates with embedded *** this study,two kinds of experimental operations of fuel cell reactants are carried out for comparison:the co-flow operation with identical gas flow direction of hydrogen and air and the counter-flow operation with opposite gas flow *** detected relative humidity(RH)distributions of both anode and cathode indicate that the asymmetry of RH distribution at two sides of the membrane in counter-flow operation is better at holding water inside the fuel cell compared with the co-flow *** in situ measured performance distributions show that segments around the middle of the fuel cell contribute the highest current in counter-flow operation,while for co-flow operation,the current peak locates near the outlet of reactants.

关键词： Proton exchange membrane fuel cell ·Segmented cell Local relative humidity Local temperature Current distribution

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A Static Spectrum Aggregation Algorithm in Cognitive Radio System

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Journal of Harbin Institute of Technology(New Series) 2013年第2期20卷 40-44页

作者： cong yin Xue-Zhi Tan Lin Ma Xiu-Hua Li Communication Research Center Harbin Institute of Technology Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory

Cognitive radio ( CR) is known as an intelligent technology allowing a secondary user ( SU) to occupy a primary user's ( PU's) band when it is idle. Appearance of the idle band may be contiguous or non-contiguous. In other words,the PU's band and the idle band are distributed alternately over the spectrum. Apparently the non-contiguous idle band cannot be fully utilized in this context. This paper proposes an algorithm to solve the problem of low utilization of the non-contiguous idle band and to increase the number of the SU who needs access to the spectrum by a static spectrum aggregation ( SSA) method combined with non-contiguous orthogonal frequency division multiplexing ( NC-OFDM) . The simulation results show that the SSA algorithm realizes at least 70% utilization of the idle band which provides access to the spectrum for as many as 30 SUs as expected.

关键词： cognitive radio static spectrum aggregation non-contiguous OFDM

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Characteristics of rock fragments in different forest stony soil and its relationship with macropore characteristics in mountain area, northern China

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Journal of Mountain Science 2018年第3期15卷 519-531页

作者： MENG Chen NIU Jian-zhi yin Zheng-cong LUO Zi-teng LIN Xing-na JIA Jing-wei College of Soil and Water Conservation Beijing Forestry University Beijing Collaborative Innovation Center for Eco-environmental Improvement with Forestry and Fruit Trees Beijing University of Agriculture Department of Geography Texas A&M University College Station

Rock fragments have major effect on soil macropores and water movement. However, the characteristics of rock fragments and their relationship with macropore characteristics remain elusive in forest stony soils in northern mountainous area of China. The objectives of this study are to(1) use Industrial Computed Tomography(CT) scanning to quantitatively analyze rock fragment characteristics in intact soil columns in different forest lands and(2) identify the relationship between characteristics of rock fragments and that of the macropores. Intact soil columns that were 100 mm in diameter and 300 mm long were randomly taken from six local forest stony soils in Wuzuolou Forest Station in Miyun, Beijing. Industrial CT was used to scan all soil column samples, and then the scanned images were utilized to obtain the three-dimensional(3 D) images of rock fragments and macropore structures. Next, theparameters of the rock fragments and macropore structure were measured, including the volume, diameter, surface area, and number of rock fragments, as well as the volume, diameter, surface area, length, angle, tortuosity and number of macropores. The results showed that no significant difference was found in soil rock fragments content in the 10-30 cm layer between mixed forest and pure forest, but in the 0-10 cm soil layer, the rock fragments in mixed forest were significantly less than in pure forest. The number density of macropores has significant negative correlation with the number of rock fragments in the 0-10 cm soil layer, whereas this correlation is not significant in 10-20 cm and 20-30 cm soil layers. The volume density of macropore was not correlated with the volume density of rock fragments, and there is no correlation between the density of macropore surface area and the density of rock fragment surface area. Industrial CT scanning combined with image processing technology canprovide a better way to explore 3 D distribution of rock fragments in soil. The content of

关键词： Rock fragment Macropore Forest stone soil Mountain area Industrial Computed Tomography

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Observation of Two-Level Critical State in the Superconducting FeTe Thin Films

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Chinese Physics Letters 2019年第7期36卷 94-97页

作者： Hao Ru Yi-Shi Lin yin-cong Chen Yang Feng Yi-Hua Wang Department of Physics and State Key Laboratory of Surface Physics Fudan University

FeTe, a non-superconducting parent compound in the iron-chalcogenide family, becomes superconducting after annealing in oxygen. Under the presence of magnetism, spin-orbit coupling, inhomogeneity and lattice distortion,the nature of its superconductivity is not well understood. Here we combine the mutual inductance technique with magneto transport to study the magnetization and superconductivity of FeTe thin films. It is found that the films with the highest TC show non-saturating superfluid density and a strong magnetic hysteresis distinct from that in a homogeneous superconductor. Such a hysteresis can be well explained by a two-level critical state model and suggests the importance of granularity to superconductivity in this compound.

关键词： a non-superconducting iron-chalcogenide superconductivity in this compound

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Fiber-Optic Solution Concentration Sensor Based on a Pressure-Induced Long-Period Grating in a Composite Waveguide

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Chinese Physics Letters 2012年第9期29卷 73-76页

作者： SHI Sheng-Hui ZHOU Xiao-Jun ZHANG Zhi-Yao LAN Lan yin cong LIU Yong School of Opto-electronic Information University of Electronic Science and Technology of ChinaChengdu 610054 State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054

A fiber-optic solution concentration sensor based on a pressure-induced long-period grating(LPG)in a composite optical waveguide is *** composite waveguide consists of a standard single-mode fiber with its coating stripped away,a teflon-cannula and the medium to be *** experiment has been carried out to measure the concentration of the sodium chloride(NaCl)*** results show that the central resonant wavelengths of the LPG shift towards shorter wavelengths when the concentration of the NaCl solution *** central resonant wavelength of the LP_(14) cladding mode exhibits a total blue shift of 4.13 nm in the NaCl solution concentration range of 0–25%,which corresponds to a sensing sensitivity of 0.17 nm/%.

关键词： waveguide fiber Waveguide

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Frequency Stabilization Using Polarization Spectroscopy and Cr-He Hollow Cathode Discharge

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Chinese Physics Letters 2011年第9期28卷 136-138页

作者： yin cong QIAN Jin ZHANG Xiao-Ping SHI Chun-ying WANG Han-Ping HUANG Sheng-Ye Division of Metrology in Length and Precision Engineering National Institute of MetrologyBeijing 100013 China South Industry Academe Beijing 100089

Polarization spectroscopy is used to lock a frequency-doubled Ti:Sapphire laser to the 425.5 nm ^(7)S3→^(7)P_(4)0 transition of ^(52)Cr.A Cr−He hollow cathode discharge cell is designed and fabricated to produce Cr atom vapor instead of a high temperature *** any modulation devices or lock-in amplifiers,a high signal-to-background level polarization spectroscopy signal is ***,a frequency fluctuation of±295 kHz for more than one hour is achieved.

关键词： polarization signal Polarization

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