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Petrogenesis and tectonic implications of Late Triassic granitoids in the Alananshan,East Kunlun belt:evidence from geochemistry,geochronology,and zircon Hf isotopic compositions

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Acta Geochimica 2022年第6期41卷 947-967页

作者： Zhen Xi Huan Li Safiyanu Muhammad Elatikpo Guangming Gao decheng Ma School of Municipal and Geomatics Engineering Hunan City UniversityYiyang413000China School of Geosciences and Info-Physics Central South UniversityChangsha410083China Department of Geology Ahmadu Bello UniversityZariaNigeria No.701 Geological Team Xinjiang Nonferrous Geoexploration BureauChangji831100China

The Qimantag in the East Kunlun Orogenic Belt has widespread Triassic magmatic rocks that have received scant attention,with an unresolved issue relating to its petrogenesis and *** this paper,we used zircon U-Pb-Hf isotopes and whole-rock geochemistry to trace the petrogenesis and tectonic settings of the moyite and monzogranite from the Qimantag Alananshan,East *** moyite and monzogranite are silicic(SiO_(2-)~69.9-76.41%),highly alkali(Na_(2)O+K_(2)O~7.29 to8.96 wt.%),with Mg^(#)about 10.4-30.34,indicative of a high-K calc-alkaline rock *** rare earth element patterns diagram is right-leaning,with a negative Eu anomaly(δEu=0.31-0.68).They are enriched in Rb,K,and light rare earth elements but depleted in Nb,Ta,and Ti,with abundant amphibole,typical of I-type granites.U-Pb on zircon constrained the emplacement of the moyite at 223.9±2.6 Ma and monzogranite at 226.9±2.9 ***εHf(t)values range from-2.8 to+0.1 except for one outlier value of-7.0,corresponding two-stage model age of 1249-1437 *** combined geochemical and isotopic results indicate that the moyite and monzogranite were derived from partial melting of the lower thicken crust with the contribution from the older basement *** rocks formed in a post-collision setting that is transitional between compressive collision and extension orogeny.

关键词： I-type granite Petrogeochemistry Triassic magmatic rocks Hf isotope East Kunlun orogenic belt

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An unsupervised heterogeneous change detection method based on image translation network and post-processing algorithm

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International Journal of Digital Earth 2022年第1期15卷 1056-1080页

作者： decheng Wang Feng Zhao Hui Yi Yinan Li Xiangning Chen Space Information Academy Space Engineering UniversityBeijingPeople’s Republic of China China Satellite Maritime Tracking and Control Department JiangyinPeople’s Republic of China

The change detection(CD)of heterogeneous remote sensing images is an important but challenging *** difficulty is to obtain the change information by directly comparing the different statistical characteristics of the images acquired by different *** paper proposes an unsupervised method for heterogeneous image CD based on an image domain transfer ***,an attention mechanism is added to the Cycle-generative adversarial networks(Cycle-GANs)to obtain a more consistent feature expression by transferring bi-temporal heterogeneous images to the common *** Euclidean distance of the corresponding pixels is calculated in the common domain to form a difference map,and a threshold algorithm is applied to get a rough change ***,the proposed adaptive Discrete Cosine Transform(DCT)algorithm reduces the noise introduced by false detection,and the final change map is *** proposed method is verified on three real heterogeneous CD datasets and compared with the current state-of-the-art *** results show that the proposed method is accurate and robust for performing heterogeneous CD tasks.

关键词： Unsupervised change detection heterogeneous images cycle-generative adversarial networks(Cycle-GANs) attention mechanism domain transfer

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Determination of Adsorption Isotherm of Column of Simulated Moving Bed 36

Determination of Adsorption Isotherm of Column of Simulated ...

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第36届中国控制会议

作者： Deng Jiabi LiLing Yuan decheng College of Information Engineering Shenyang University of chemical technology

ISBN: (纸本)9781538629185

Through the study of the Simulated Moving Bed chromatography separation technology,the determination of the adsorption isotherm is related to the modeling of the simulated moving bed and the choice of the operating parameters of the simulated moving *** this paper,Firstly,the common 4 kinds of adsorption isotherms are listed,and the relationship between the components in the solid phase and the liquid phase is obtained by using MATLAB,And then by the same set of data we use genetic algorithm to determine the SMB chromatography column of different types of the parameters of the adsorption ***,we draw a conclusion.

关键词： Simulated Moving Bed chromatographic column adsorption isotherm MATLAB GA

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Field monitoring of differential frost heave in widened highway subgrade

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Research in Cold and Arid Regions 2021年第5期13卷 408-418页

作者： XuFeng Lu Feng Zhang KangWei Tang decheng Feng School of Transportation Science and Engineering Harbin Institute of TechnologyHeilongjiang 150090HarbinChina

In cold regions,the widened subgrade could produce uneven frost heave that is detrimental to the *** study investigates the differential frost heave characteristics in a widened *** field monitoring system mainly consists of temperature,moisture,and displacement sensors and distributed optical fiber cables for strain *** monitoring results show that the cooling period in the subgrade is longer than the warming *** content in the subgrade changes significantly within 0−2 m below the subgrade surface but stabilizes within 2−5 *** maximum frost heave occurs from February to *** comparison,the existing subgrade has a longer freezing period and larger heave value,caused by the higher density and water content *** in the existing subgrade migrates into the new one after widening,leading to frost heave reduction in the existing ***,the traffic loads result in the consolidation of the new subgrade,thus reducing the heave value in the second *** the third year,the water supply from the existing subgrade facilitates the frost heave in the new *** tensile strain distributions obtained by the distributed optical fiber cables show that the maximum differential frost heave occurs at the joint between the existing and new *** differential frost heave gradually stabilizes after three ***,an improved frost heave prediction model is developed based on the segregation potential concept and monitoring results.

关键词： widened subgrade differential frost heave field monitoring distributed optical fiber strain sensing seasonally frozen region

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THE POSSIBILITIES OF COLD NUCLEAR FUSION OF DEUTERIUM

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Chinese Physics Letters 1990年第1期7卷 28-31页

作者： JIN Shangxian DING Yibing LIU Yongzhen WU Bailu YAO decheng Department of Physics Graduate SchoolAcademia SinicaBeijing 100039

The possible mechanisms of deuteron-deuteron fusion during electrolytic infusion of deuterons into metallic palladium electrode are studied,and a rough estimations of the fusion rate are *** results show that D-D fusion rate in the equilibrium deuteron system at normal temperature and atmospheric pressure can not reach the level which can be measured experimentally.

关键词： palladium electrolytic metallic

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Numerical simulation of electroosmosis in unsaturated compacted clay

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Research in Cold and Arid Regions 2021年第5期13卷 394-407页

作者： KangWei Tang Feng Zhang decheng Feng GuanFu Wang School of Transportation Science and Engineering Harbin Institute of Technology73 Huanghe RoadHarbinHeilongjiang 150090China

The moisture content of a road subgrade in cold regions will increase after freeze-thaw cycles,resulting in subgrade strength and stiffness *** is widely used in treating saturated soft soils to decrease the moisture *** induced moisture migration during electroosmosis in unsaturated soil is much more complex than that of saturated soil because of a series of nonlinear changes in soil *** study first uses an exponential function to characterize the relationship between electroosmotic permeability and saturation ***,a one-dimensional model is developed to simulate the electroosmosis-induced moisture migration in unsaturated *** results show that electroosmosis reduces the saturation degree of the unsaturated soil,indicating that it can be applied to subgrade *** parameters such as soil pore size distribution coefficient,air entry value,and effective voltage significantly affect moisture *** properties of unsaturated soils are extremely important to the efficiency of electroosmosis.

关键词： electro-osmosis unsaturated clay moisture migration numerical simulation

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Real-Space Renormalization Group Approach of the Potts Model on the Octagonal Quasi-Periodic Tiling

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Wuhan University Journal of Natural Sciences 1998年第3期3卷 39-42页

作者： Xiong, Gang Zhang, Zhehua Tian, decheng Department of Physics Wuhan University Wuhan China

A one step real space renormalization group(RSRG)transformation is used to study the ferromagnetic(FM)Potts model on the two dimemsional (2D) octagonal quasi periodic tiling(OQT). The critical exponents of the correlation length in the q =1,2,3,4 cases and the crtitical surface of the Ising model are obtained. The results are discussed by comparing with previous results on the OQT and the square lattice(SQL).

关键词： renormalization,quasi periodic critical exponent

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Modeling spatio-temporal distribution of soil moisture by deep learning-based cellular automata model

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Journal of Arid Land 2016年第5期8卷 734-748页

作者： SONG Xiaodong ZHANG Ganlin LIU Feng LI decheng ZHAO Yuguo YANG Jinling State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of Sciences

Soil moisture content （SMC） is a key hydrological parameter in agriculture,meteorology and climate change,and understanding of spatio-temporal distributions of SMC in farmlands is important to address the precise irrigation ***,the hybrid interaction of static and dynamic environmental parameters makes it particularly difficult to accurately and reliably model the distribution of *** present,deep learning wins numerous contests in machine learning and hence deep belief network （DBN） ,a breakthrough in deep learning is trained to extract the transition functions for the simulation of the cell state *** this study,we used a novel macroscopic cellular automata （MCA） model by combining DBN to predict the SMC over an irrigated corn field （an area of 22 km^2） in the Zhangye oasis,Northwest *** and dynamic environmental variables were prepared with regard to the complex hydrological *** widely used neural network,multi-layer perceptron （MLP） ,was utilized for comparison to *** hybrid models （MLP-MCA and DBN-MCA） were calibrated and validated on SMC data within four months,*** to September 2012,which were automatically observed by a wireless sensor network （WSN） .Compared with MLP-MCA,the DBN-MCA model led to a decrease in root mean squared error （RMSE） by 18%.Thus,the differences of prediction errors increased due to the propagating errors of variables,difficulties of knowing soil properties and recording irrigation amount in *** sequential Gaussian simulation （s Gs） was performed to assess the uncertainty of soil moisture *** with a threshold of SMC for each grid cell,the local uncertainty of simulated results in the post processing suggested that the probability of SMC less than 25% will be difference in different areas at different time *** current results showed that the DBN-MCA model performs better than the MLP-MCA model,and the DBN-MCA model provides a powerful tool for predicti

关键词： soil moisture soil moisture sensor network macroscopic cellular automata (MCA) deep belief network (DBN) multi-layer perceptron (MLP) uncertainty assessment hydropedology

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Experimental Investigation on Fracturing Behaviors after Liquid Nitrogen Pre-Injection in High-Temperature Sandstone

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Energy Engineering 2023年第11期120卷 2503-2516页

作者： decheng Li Yan Zhang Dongdong Ma Haozhe Geng Yu Wu School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhou221116China State Key Laboratory for Geomechanics andDeepUnderground Engineering China University of Mining and TechnologyXuzhou221116China

The fracturing process of sandstone is inherently complex due to its loose internal structure and deformation *** nitrogen pre-injection has emerged as a promising approach to damage reservoir rocks,effectively reducing fracture pressure and establishing intricate fracture networks,thus offering a potential solution for reservoir *** unravel the fundamental mechanisms governing sandstone fracturing behaviors following liquid nitrogen pre-injection,sandstone fracturing experiments were conducted under varying durations of liquid nitrogen injection,rock temperature,and in-situ stress *** experiments showcased the evolution of injection pressure and fracture characteristics under different testing conditions,complemented by electron microscope analysis to elucidate the factors driving the complex fracture characteristics of *** findings revealed a significant decrease in fracture pressure after liquid nitrogen pre-injection,accompanied by a notable increase in the complexity of the fracture network and the roughness of the fracture ***,prolonging the duration of liquid nitrogen injection and elevating reservoir temperature further contributed to reducing fracture pressure,consequently enhancing fracture complexity and surface ***,the application of confining pressure amplified fracture pressure while intensifying the degree of ***,the investigation highlighted the increased presence of microcracks in sandstone resulting from liquid nitrogen preinjection,facilitating fluid diffusion during fracturing and yielding lower fracture pressures,thereby enhancing the effectiveness of sandstone reservoir *** research results can provide theoretical guidance for geothermal reservoir reconstruction.

关键词： Sandstone high temperature liquid nitrogen pre-injection fracturing behaviors

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Potentilla anserina polysaccharide alleviates cadmium-induced oxidative stress and apoptosis of H9c2 cells by regulating the MG53-mediated RISK pathway

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Chinese Journal of Natural Medicines 2023年第4期21卷 279-291页

作者： ZHAO Lixia CHENG Ju LIU Di GONG Hongxia BAI decheng SUN Wei Institute of Integrated Traditional Chinese and Western Medicine School of Basic Medical SciencesLanzhou UniversityLanzhou 730000China School of Nursing Gansu University of Chinese MedicineLanzhou 730000China Key Laboratory of Dunhuang Medicine Ministry of EducationGansu University of Chinese MedicineLanzhou 730000China Institute of Genetics School of Basic Medical SciencesLanzhou UniversityLanzhou 730000China Key laboratory of Evidence Science Techniques Research and Application of Gansu Province Gansu University of Political Science and LawLanzhou 730000China School of Basic Medical Sciences Gansu University of Chinese MedicineLanzhou 730000China Department of Cardiac Surgery The First Hospital of Lanzhou UniversityLanzhou 730000China

Oxidative stress plays a crucial role in cadmium(Cd)-induced myocardial *** 53(MG53)and its mediated reperfusion injury salvage kinase(RISK)pathway have been demonstrated to be closely related to myocardial oxidative *** anserina ***(PAP)is a polysaccharide with antioxidant capacity,which exerts protective effect on Cd-induced ***,it remains unknown whether PAP can prevent and treat Cd-induced cardiomyocyte *** present study was desgined to explore the effect of PAP on Cd-induced damage in H9c2 cells based on MG53 and the mediated RISK *** in vitro evaluation,cell viability and apoptosis rate were analyzed by CCK-8 assay and flow cytometry,***,oxidative stress was assessed by 2',7'-dichlorodihydrofluorescein diacetate(DCFH-DA)staining and using superoxide dismutase(SOD),catalase(CAT),and glutathione/oxidized glutathione(GSH/GSSG)*** mitochondrial function was measured by JC-10 staining and ATP detection *** blot was performed to detect the expression of proteins related to MG53,the RISK pathway,and *** results indicated that Cd increased the levels of reactive oxygen species(ROS)in H9c2 *** decreased the activities of SOD and CAT and the ratio of GSH/GSSG,resulting in decreases in cell viability and increases in ***,PAP reversed Cd-induced oxidative stress and cell ***,Cd reduced the expression of MG53 in H9c2 clls and inhibited the RISK pathway,which was mediated by decreasing the ratio of p-Akt^(Ser473)/Akt,p-GSK3β^(Ser9)/GSK3β and p ERK1/2/ERK1/*** addition,Cd impaired mitochondrial function,which involved a reduction in ATP content and mitochondrial membrane potential(MMP),and an increase in the ratio of Bax/Bcl-2,cytoplasmic cytochrome c/mitochondrial cytochrome c,and Cleaved-Caspase 3/Pro-Caspase ***,PAP alleviated Cd-induced MG53 reduction,activated the RISK pathway,and reduced mitochondrial dama

关键词： Potentilla anserina L. Cadmium MG53 RISK pathway Oxidative stress Apoptosis Polysaccharide

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