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Effect of Sand Body Enrichment Under the Restriction of a Tectonic Transfer Zone: A Case Study on the Pinghu Formation in the Kongqueting Region on the Pinghu Slope

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Journal of Ocean University of China 2021年第4期20卷 765-776页

作者： LI Junjie HOU Guowei QIN Lanzhi XIE Jingjing jiang xue CNOOC(China)Co. Ltd.Shanghai CompanyShanghai 200030China

Results of long-term explorations in the Kongqueting region,located in an East China Sea depression,suggest that the strong fault activity during the sedimentary period of the Pinghu formation significantly influenced the development of the sedimentary ***,the aggregation and enrichment of the sand body under a tectonic background has become a problem that requires an immediate *** research outcomes of previous studies,this study used three-dimensional seismic and logging data to identify Y-or H-type and the en echelon distribution patterns of the fault plane,as well as identify the locations wherein the fault growth index value is greater than 1 in the study region,indicating the tectonic background of the fault transfer zone in the ***,the development type of the fault transfer zone was studied,and the sand body enrichment site was identified based on seismic inversion data and the development position of the fault transfer *** helps clarify the evolution of sedimentary facies of the Pinghu formation combined with the sedimentary environment of the braided-river ***,after summarizing the coupling relationship between the synsedimentary fault systems and the sand body enrichment patterns,three sand-control models were determined,namely,the flexural-parallel,the en echelon collinear,and the torsional-reformed superimposed transfer *** findings of this study lay a foundation for the subsequent search of tectonic lithologic oil and gas reservoirs.

关键词： synsedimentary fault paleogeomorphology structural transfer zone sand body distribution Kongqueting

The response of structure and nitrogen removal function of the biofilm on submerged macrophytes to high ammonium in constructed wetlands

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Journal of Environmental Sciences 2024年第8期142卷 129-141页

作者： xue jiang Mengmeng Wang Shunqing Yang Di He Fei Fang Liuyan Yang State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China School of Resources and Environment Anqing Normal UniversityAnqing 246133China

The ammonium exceedance discharge from sewage treatment plants has a great risk to the stable operation of subsequent constructed wetlands(CWs).The effects of high ammonium shocks on submerged macrophytes and epiphytic biofilms on the leaves of submerged macrophytes in CWs were rarely mentioned in previous *** this paper,the 16S rRNA sequencing method was used to investigate the variation of the microbial communities in biofilms on the leaves of Vallisneria natans plants while the growth characteristics of *** plants were measured at different initial ammonium *** results demonstrated that the total chlorophyll and soluble sugar synthesis of *** plants decreased by 51.45%and 57.16%,respectively,and malondialdehyde content increased threefold after8 days if the initial NH_(4)^(+)-N concentration was more than 5 mg/*** density,bacterial quantity,dissolved oxygen,and pH increased with high ammonium *** average removal efficiencies of total nitrogen and NH_(4)^(+)-N reached 73.26%and 83.94%,*** heat map and relative abundance analysis represented that the relative abundances of phyla Proteobacteria,Cyanobacteria,and Bacteroidetes *** numbers of autotrophic nitrifiers and heterotrophic nitrification aerobic denitrification(HNAD)bacteria expanded in *** particular,HNAD bacteria of Flavobacterium,Hydrogenophaga,Acidovorax,Acinetobacter,Pseudomonas,Aeromonas,and Azospira had higher abundances than autotrophic nitrifiers because there were organic matters secreted from declining leaves of *** *** analysis of the nitrogen metabolic pathway showed aerobic denitrification was the main nitrogen removal ***,the nitrification and denitrification bacterial communities increased in epiphytic biofilms on submerged macrophytes in constructed wetlands while submerged macrophytes declined under ammonium shock loading.

关键词： Ammonium shock loading Biofilm Autotrophic nitrifiers Heterotrophic nitrification aerobic denitrification bacteria Submerged macrophyte

Dialdehyde cellulose nanocrystal cross-linked chitosan foam with high adsorption capacity for removal of acid red 134

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Frontiers of Chemical Science and Engineering 2023年第7期17卷 853-866页

作者： Xiuzhi Tian Rui Yang Chuanyin Xiong Haibo Deng Yonghao Ni xue jiang College of Bioresource Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China College of Textile Science and Engineering Jiangnan UniversityWuxi 214122China Department of Chemical Engineering and Limerick Pulp and Paper Centre University of New BrunswickFrederictonNB E3B 5A3Canada

The discharge of large amounts of dye-containing wastewater seriously threats the *** have been adopted to remove these dyes present in the ***,the high adsorption capacity,predominant pH-responsibility,and excellent recyclability are three challenges to the development of efficient *** poly(acryloxyethyl trimethylammonium chloride)-graft-dialdehyde cellulose nanocrystals were synthesized in our ***,the cationic dialdehyde cellulose nanocrystal cross-linked chitosan nanocomposite foam was fabricated via freeze-drying of the *** the optimal ratio of the cationic dialdehyde cellulose nanocrystal/chitosan(w/w)of 12/100,the resultant foam(Foam-12)possesses excellent absorption properties,such as high porosity,high content of active sites,strong acid resistance,and high amorphous ***,Foam-12 was applied as an eco-friendly adsorbent to remove acid red 134(a representative of anionic dyes)from aqueous *** maximum dye adsorption capacity of 1238.1 mg∙g^(‒1) is achieved under the conditions of 20 mg∙L‒1 adsorbents,100 mg∙L^(‒1) dye,pH 3.5,24 h,and 25℃.The dominant adsorption mechanism for the anionic dye adsorption is electrostatic attraction,and Foam-12 can effectively adsorb acid red 134 at pH 2.5–5.5 and be desorbed at pH *** easy recovery and good reusability are verified by the repeated acid adsorption–alkaline desorption experiments.

关键词： chitosan foam cellulose nanocrystals acid red 134 adsorption

Robust channel estimation based on the maximum entropy principle

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Science China(Information Sciences) 2023年第12期66卷 209-221页

作者： Zhengyang HU jiang xue Feng LI Qian ZHAO Deyu MENG Zongben XU School of Mathematics and Statistics Xi’an Jiaotong University

Channel estimation(CE) is one of the crucial and fundamental elements of signal processing,especially considering the requirement of high accuracy in future wireless communication systems. Most traditional CE algorithms are explored under the assumption of Gaussian white noise, which limits the algorithms performance in real wireless communication situations. In this work, a novel self-adaptive CE algorithm based on the maximum entropy principle(MEP) was studied, which analyzes the statistical components of an arbitrary noise environment. In addition, an MEP channel-based signal estimation algorithm was studied. Furthermore, the statistical characteristics of channels were considered the regularization terms in the objective function for providing prior information and further increasing the accuracy. It was found that the proposed algorithm not only provides accurate CE but also reduces pilot consumption by using estimated signal data as pseudo pilots. The superior features of the proposed method concerning CE accuracy,pilot consumption, and robustness were confirmed through Monte Carlo simulations.

关键词： channel estimation maximum entropy principle pseudo pilot channel statistic characteristic colorful noise

Interface engineering of transition metal dichalcogenide/GaN heterostructures:Modified broadband for photoelectronic performance

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Chinese Physics B 2022年第11期31卷 515-521页

作者： Yinlu Gao Kai Cheng xue jiang Jijun Zhao Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Dalian University of Technology)Ministry of EducationDalian 116024China School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi'an 710121China

The GaN-based heterostructures are widely used in optoelectronic devices,but the complex surface reconstructions and lattice mismatch greatly limit the *** stacking of two-dimensional transition metal dichalcogenide(TMD=MoS_(2),MoSSe and MoSe_(2))monolayers on reconstructed GaN surface not only effectively overcomes the larger mismatch,but also brings about novel electronic and optical *** adopting the reconstructed GaN(0001)surface with adatoms(N-ter GaN and Ga-ter GaN),the influences of complicated surface conditions on the electronic properties of heterostructures have been *** passivated N-ter and Ga-ter GaN surfaces push the mid-gap states to the valence bands,giving rise to small bandgaps in *** charge transfer between Ga-ter GaN surface and TMD monolayers occurs much easier than that across the TMD/N-ter GaN interfaces,which induces stronger interfacial interaction and larger valence band offset(VBO).The band alignment can be switched between type-I and type-II by assembling different TMD monolayers,that is,MoS_(2)/N-ter GaN and MoS_(2)/Ga-ter GaN are type-II,and the others are *** absorption of visible light is enhanced in all considered TMD/reconstructed GaN ***,MoSe_(2)/Ga-ter GaN and MoSSe/N-ter GaN have larger conductor band offset(CBO)of 1.32 eV and 1.29 eV,respectively,extending the range from deep ultraviolet to infrared *** results revel that the TMD/reconstructed GaN heterostructures may be used for high-performance broadband photoelectronic devices.

关键词： GaN-based device surface reconstructions transition metal dichalcogenide(TMD) absorption spectra

The study on preparing anti-radiation material by reverse microemulsion method

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Chinese Chemical Letters 2008年第5期19卷 615-618页

作者： Ping Ping jiang xue Min Lin Jian Bo Chen School of Chemical and Material Engineering Jiangnan University Wuxi 214122 China

A new way to prepare PMMA contain lead salt was presented. This work firstly prepares the material by microemulsion polymerization. The ability of anti-radiation, transmittance ratio and glass transition temperature （Tg） of the material was characterized. The anti-radiation ability is enhanced with the increasing of lead salt content and the thickness of the material. The transmittance ratio decreased with the content of the lead salt. The glass transition temperature of the material is increased with the lead salt content of the organic glass.

关键词： Microemulsion Polymerization Anti-radiation

Toxicity assessment of heavy metals and organic compounds using CellSense biosensor with ***

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Chinese Chemical Letters 2008年第2期19卷 211-214页

作者： Hong Wang xue jiang Wang Jian Fu Zhao Ling Chen State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and Engineering ongji University Shanghai 200092 China

A new strategy using an arnperometric biosensor with Escherichia coli （E. coli） that provides a rapid toxicity determination of chemical compounds is described. The CellSense biosensor system comprises a biological component immobilized in intimate contact with a transducer which converts the biochemical signal into a quantifiable electrical signal. Toxicity assessment of heavy metals using *** biosensors could be finished within 30 min and the 50% effective concentrations （ECso） values of four heavy metals were determined. The results shows that inhibitory effects of four heavy metals to *** can be ranked in a decreasing order of Hg^2＋〉 Cu^2＋〉 Zn^2＋〉 Ni^2＋, which accords to the results of conventional bacterial counting method. The toxicity test of organic compounds by using CellSense biosensor was also demonstrated. The CellSense biosensor with E. coli shows a good, reproducible behavior and can be used for reproducible measurements.

关键词： Whole-cell biosensor Heavy metal Organic compounds Toxicity

Production and application of a novel bioflocculant by multiple-microorganism consortia using brewery wastewater as carbon source

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Journal of Environmental Sciences 2007年第6期19卷 667-673页

作者： ZHANG Zhi-qiang LIN Bo XIA Si-qing WANG xue-jiang YANG A-ming State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China College of Environmental -Science and Engineering Nanchang University Nanchang 330031 China

The flocculating activity of a novel bioflocculant MMF1 produced by multiple-microorganism consortia MM1 was investigated. MM1 was composed of strain BAFRT4 identified as Staphylococcus sp. and strain CYGS1 identified as Pseudomonas sp. The flocculating activity of MMF1 isolated from the screening medium was 82.9%, which is remarkably higher than that of the bioflocculant produced by either of the strains under the same condition. Brewery wastewater was also used as the carbon source for MM1, and the cost-effective production medium for MM1 mainly comprised 1.0 L brewery water （chemical oxygen demand （COD） 5000 mg/L）, 0.5 g/L urea, 0.5 g/L yeast extract, and 0.2 g/L （NH4）2SO4. The optimal conditions for the production of MMF1 was inoculum size 2%, initial pH 6.0, cultivating temperature 30℃, and shaking speed 160 r/min, under which the flocculating activity of the MMF1 reached 96.8%. Fifteen grams of purified bioflocculant could be recovered from 1.0 L of fermentation broth. MMF1 was identified as a macromolecular substance containing both protein and polysaccharide. It showed good flocculating performance in treating indigotin printing and dyeing wastewater, and the maximal removal efficiencies of COD and chroma were 79.2% and 86.5%, respectively.

关键词： bioflocculant multiple-microorganism consortia brewery wastewater carbon source indigotin printing and dyeing wastewater

Development of unconventional gas and technologies adopted in China

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Energy Geoscience 2020年第1期1卷 55-68页

作者： Yang Li De-Hua Zhou Wei-Hong Wang Ting-xue jiang Zhao-Jie xue China Petroleum&Chemical Corporation Beijing100728China Sinopec Exploration&Production Research Institute Beijing100083China Sinopec Research Institute of Petroleum Engineering Beijing100101China

This study analyses the geological characteristics and development progress of unconventional gas in China,summarizes the development theories and technologies,discusses the prospects and challenges of unconventional gas development,and puts forward the future trends of development *** technologies of unconventional gas development are available in *** gas development technologies include comprehensive geological evaluation,volume fracturing of cluster horizontal wells under complex stress conditions,and factory-like operation of horizontal wells in complex mountainous area et *** gas development technologies include fluid identification and quantitative prediction,optimization of well patterns,multi-layer fracturing in vertical well,staged fracturing in horizontal well,and drainage gas *** methane(CBM)development technologies include the prediction of medium-high-and medium-low-rank CBM enrichment areas,rate-variable hydraulic fracturing,and quantitative drainage recovery with five stages,three pressures,and four *** economic and effective development of unconventional gas,further efforts should be ***,intensified studies should be conducted on high-precision prediction and fine characterization technologies of high-quality shale reservoirs in deep marine,continental,and transitional ***,key theories and technologies such as fast drilling and completion of wells with long laterals as well as large-scale volume fracturing should be developed to improve well ***,new technologies such as multiple well-type development,fluid injection,and nano-flooding should be developed to enhance the ***,effort should be made to identify the accumulation mechanism and large-scale effective development technologies for ***,the application of large amounts of data and artificial intelligence in the entire process of unconventional gas development should be considered to reduce the dev

关键词： Unconventional gas Geologic characteristics Development history Integrated development technology