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Changes in Soil Properties Under the Influences of Cropping and Drip Irrigation During the Reclamation of Severe Salt-Affected Soils

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Agricultural Sciences in China 2009年第10期8卷 1228-1237页

作者： TAN Jun-li kang yue-hu Key Laboratory of Water Cycle and Related and Land Surface Processes Institute of Geographic Sciences and Natural Resource ResearchChinese Academy of Sciences Beijing 100101 P.R.China Graduate School Chinese Academy of Sciences Beijing 100039 P.R.China College of Civil Engineer and Water Conservancy Ningxia University Yinchuan 750021 P.R.China

Reclamation of salt-affected land plays an important role in mitigating the pressure of agricultural land due to competition with industry and construction in China. Drip irrigation was found to be an effective method to reclaim salt-affected land. In order to improve the effect of reclamation and sustainability of salt-affected land production, a field experiment （with reclaimed 1-3 yr fields） was carried out to investigate changes in soil physical, chemical, and biological properties during the process of reclamation with cropping maize and drip irrigation. Results showed that soil bulk density in 0-20 cm soil layer decreased from 1.71 g·cm-3 in unreclaimed land to 1.44 g ·cm^-3 in reclaimed 3 yr fields, and saturated soil water content of 0-10 cm layer increased correspondingly from 20.3 to 30.2%. Both soil salinity and pH value in 0-40 cm soil layer dropped markedly after reclaiming 3 yr. Soil organic matter content reduced, while total nitrogen, total phosphorus, and total potassium all tended to increase after cropping and drip irrigation. The quantities of bacteria, actinomycete, and fungi in 0-40 cm soil layer all greatly increased with increase of reclaimed years, and they tended to distribute homogeneously in 0-40 cm soil profile. The urease activity and alkaline phosphatase activity in 0-40 cm soil layers were also enhanced, but the sucrase activity was not greatly changed. These results indicated that after crop cultivation and drip irrigation, soil physical environment and nutrients status were both improved. This was benefit for microorganism＇s activity and plant＇s growth.

关键词： reclamation drip irrigation changes of soil properties salt-affected soil

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Navigation in virtual and real environment using brain computer interface:a progress report

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Virtual Reality & Intelligent Hardware 2022年第2期4卷 89-114页

作者： Haochen HU yue LIU kang yue Yongtian WANG Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Advanced Innovation Center for Future Visual Entertainment Beijing Film AcademyBeijing 100088China

A brain-computer interface (BCI) facilitates bypassing the peripheral nervous system and directly communicating with surrounding devices. Navigation technology using BCI has developed-from exploring the prototype paradigm in the virtual environment (VE) to accurately completing the locomotion intention of the operator in the form of a powered wheelchair or mobile robot in a real environment. This paper summarizes BCI navigation applications that have been used in both real and VEs in the past 20 years. Horizontal comparisons were conducted between various paradigms applied to BCI and their unique signal-processing methods. Owing to the shift in the control mode from synchronous to asynchronous, the development trend of navigation applications in the VE was also reviewed. The contrast between high level commands and low-level commands is introduced as the main line to review the two major applications of BCI navigation in real environments: mobile robots and unmanned aerial vehicles (UAVs). Finally, applications of BCI navigation to scenarios outside the laboratory;research challenges, including human factors in navigation application interaction design;and the feasibility of hybrid BCI for BCI navigation are discussed in detail.

关键词： Brain-computer interface Virtual reality Human-computer interface Navigation Motor imagery Steady-state visual evoked potential

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Integration exosomes with MOF-modified multifunctional scaffold for accelerating vascularized bone regeneration

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Chinese Chemical Letters 2023年第2期34卷 429-433页

作者： Chang Xu yue kang Xufeng Dong Daqing Jiang Min Qi School of Materials Science and Engineering Dalian University of TechnologyDalian 116024China Department of Breast Surgery Cancer Hospital of China Medical UniversityShenyang 110042China

Designing a multifunctional scaffold with osteogenic and angiogenic properties holds promise for ideal bone regeneration. Innovative scaffold was here constructed by immobilizing exosomes derived from human bone mesenchymal stem cells(h BMSCs) onto porous polymer meshes which developed by PLGA and Cu-based MOF(PLGA/Cu BDC@Exo). The synthesized exosome-laden scaffold capable of providing a dual cooperative controllable release of bioactive copper ions and exosomes that promote osteogenesis and angiogenesis, thereby achieving cell-free bone regeneration. In vitro assay revealed the composite stent not only substantially upregulated the expression of osteogenic-related proteins(ALP, Runx2, Ocn)and VEGF in h BMSCs, but promoted the migration and tube formation of the human umbilical vein endothelial cells(HUVECs). In vivo evaluation further confirmed this scaffold dramatically stimulated bone regeneration and angiogenesis in critical-sized defects in rats. Altogether, this composite scaffold carrying therapeutic exosomes had an osteogenic-angiogenic coupling effect and offered a new idea for cell-free bone tissue engineering.

关键词： Exosomes Osteogenesis Angiogenesis Metal-organic framework Bone regeneration

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Comparison of Two Dripper Line Designs to Assess Cotton Yield,Water Use,and Net Return in Northwest China

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Journal of Integrative Agriculture 2012年第11期11卷 1924-1932页

作者： WANG Ruo-shui WAN Shu-qin kang yue-hu LIU Shi-ping Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Science and Natural Resources Research Chinese Academy of Sciences Beijing 100101 P.R.China University of Chinese Academy of Sciences Beijing 100049 P.R. China

This study aimed to compare the effects of two types of drip irrigation line design on cotton yield, water use, and net returns. The experiments were carried out in the arid region of Xinjiang, Northwest China, during 2009-2010 growing years. The two types of lateral placement are commonly used by the local farmers in the area： double lines （two laterals controlling four rows） and single line designs （one lateral controlling four rows）. The results indicated that less irrigation water was applied by single line compared with double lines design. This implies that more irrigation water could be saved using single line, by reducing the water consumption of cotton. The emergence rates for double lines were 2 and 6% higher than those for single line design in 2009 and 2010. The seed cotton yields for double lines design were 5.76 and 6.41 Mg ha-1 which were 13 and 9% higher than for single line design in 2009 and 2010, respectively. Single lines could however lower the investment cost compared to double lines, which produced 10 and 7% more net income in 2009 and 2010, respectively. By contrast, the double lines was more profitable and suitable for the farmers in Northwest China than single line design.

关键词： drip irrigation lateral layout economic benefit water saving water use efficiency (WUE)

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Room-Temperature Magnetism of Ceria Nanocubes by Inductively Transferring Electrons to Ce Atoms from Nearby Oxygen Vacancy

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Nano-Micro Letters 2016年第1期8卷 13-19页

作者： yue kang Qiang Leng Donglin Guo Dezhi Yang Yanping Pu Chenguo Hu Department of Applied Physics Chongqing University School of Public Affairs Chongqing University

Ceria(CeO_2) nanocubes were synthesized by a hydrothermal method and weak ferromagnetism was observed in room temperature. After ultraviolet irradiation, the saturation magnetization was significantly enhanced from*3.18×10^(-3) to *1.89×10^(-2) emug^(-1). This is due to the increase of oxygen vacancies in CeO_2 structure which was confirmed by X-ray photoelectron spectra. The first-principle calculation with Vienna ab-initio simulation package was used to illustrate the enhanced ferromagnetism mechanism after calculating the density of states(DOSs) and partial density of states(PDOSs) of CeO_2 without and with different oxygen vacancies. It was found that the increase of oxygen vacancies will enlarge the PDOSs of Ce 4f orbital and DOSs. Two electrons in one oxygen vacancy are respectively excited to 4f orbital of two Ce atoms neighboring the vacancy, making these electron spin directions on 4f orbitals of these two Ce atoms parallel. This superexchange interaction leads to the formation of ferromagnetism in CeO_2 at room temperature. Our work indicates that ultraviolet irradiation is an effective method to enhance the magnetism of CeO_2 nanocube, and the firstprinciple calculation can understand well the enhanced magnetism.

关键词： UV irradiation Oxygen vacancies Saturation magnetism Spin direction Superexchange interaction

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Iron-based metal-organic framework as a dual cooperative release system for enhanced vascularization and bone regeneration

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Chinese Chemical Letters 2023年第5期34卷 475-479页

作者： Chang Xu yue kang Shiqiang Guan Xufeng Dong Daqing Jiang Min Qi School of Materials Science and Engineering Dalian University of TechnologyDalian 116024China Department of Breast Surgery Cancer Hospital of China Medical UniversityShenyang 110042China

Vascularization and bone regeneration are closely related in the process of bone remodeling,and designing a bioactive scaffold with pro-angiogenic and osteogenic properties may accelerate the repair of bone *** this work,an iron-based metal-organic framework(MIL-88)was developed as a carrier for loading a pro-angiogenic small molecular drug(dimethyloxallyl glycine,DMOG),and then embedded into the PLGA nanofibrous scaffolds to repair cranial defects in *** and histological evaluation indicated that PLGA/MIL@D scaffold markedly enhanced vascularization and bone regeneration in ***,in vitro assay showed that co-delivery system significantly promoted angiogenesis by stimulating endothelial cell migration,tube formation,and enhanced osteogenesis by promoting expression of osteoblast related *** addition,PLGA/MIL@D scaffold promotes angiogenesis by activating the hypoxia-inducible factor-1(HIF-1)/vascular endothelial growth factor(VEGF)signaling ***,this bioactive PLGA/MIL@D scaffold can combine angiogenesis with osteogenesis,and will be a bright strategy for the repair of bone defects.

关键词： Osteogenesis Angiogenesis DMOG Metal-organic framework Bone regeneration

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Natural language processing(NLP)in management research:A literature review

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Journal of Management Analytics 2020年第2期7卷 139-172页

作者： yue kang Zhao Cai Chee-Wee Tan Qian Huang Hefu Liu School of Management University of Science and Technology of ChinaHefeiPeople’s Republic of China Nottingham University Business School China University of Nottingham Ningbo ChinaNingboPeople’s Republic of China cDepartment of Digitalization Copenhagen Business SchoolCopenhagenDenmark

Natural language processing(NLP)is gaining momentum in management research for its ability to automatically analyze and comprehend human ***,despite its extensive application in management research,there is neither a comprehensive review of extant literature on such applications,nor is there a detailed walkthrough on how it can be employed as an analytical *** this end,we review articles in the UT Dallas List of 24 Leading Business Journals that employ NLP as their focal analytical technique to elucidate how textual data can be harnessed for advancing management theories across multiple *** describe the available toolkits and procedural steps for employing NLP as an analytical technique as well as its advantages and *** so doing,we highlight the managerial and technological challenges associated with the application of NLP in management research in order to guide future inquires.

关键词： natural language processing literature review sentiment analysis machine learning

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Identification of a heat shock cognate protein 70 gene in Chinese soft-shell turtle (Pelodiscus sinensis) and its expression profiles under thermal stress

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第6期13卷 465-477页

作者： Xiao-liang LI yue kang Xiao-yan ZHANG Bing-lin ZHU Wei-huan FANG Zhejiang University Institute of Preventive Veterinary Medicine and Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine College of Animal SciencesZhejiang UniversityHangzhou 310058China

The heat shock cognate protein 70 (Hsc70) is a member of a 70-kDa heat shock protein (HSP70) family that functions as molecular *** this study,a novel Hsc70 gene from Chinese soft-shelled turtle (Pelodiscus sinensis) (tHsc70) was *** tHsc70 full-length complementary DNA (cDNA) is 2 272 bp long with a 1 941-bp open reading frame (ORF) encoding 646 amino *** characteristic signature regions of the HSP70 family,two major domains of an adenosine triphosphate (ATP)/guanosine triphosphate (GTP) binding domain (ABD),and a substrate-binding domain (SBD) were present in the predicted tHsc70 amino acid *** tHsc70 gene was expressed in Escherichia coli BL21 and the expression product reacted with the anti-Hsc70 mouse monoclonal antibody by Western *** analysis revealed that tHsc70 shared identity from 53.9% to 87.7% at the nucleotide level,and 49.1% to 99.5% at the amino acid level with the known *** analysis showed that tHsc70 was clustered together with the Hsc70 gene of another reptile species (Alligator mississippiensis).The tHsc70 was expressed in the liver,lung,heart,and skeletal *** expression patterns of tHsc70 messenger RNA (mRNA) differed among different tissues under different durations of heat stress at 40 °*** at 25 °C for 1 h after heat stress was also different among tissues and length of heat *** of different profiles of expression under heat stress,tHsc70 may play roles in protecting turtles from thermal stress.

关键词： Pelodiscus sinensis Heat shock cognate protein 70 (Hsc70) Phylogenetic analysis Heat stress

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Production of aryl oxygen-containing compounds by catalytic pyrolysis of bagasse lignin over LaTi0.2Fe0.8O3 prepared by different methods

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Journal of Rare Earths 2020年第1期38卷 76-83页

作者： Haiying Wang Hongjing Han Enhao Sun Yanan Zhang Jinxin Li Yanguang Chen Hua Song Hongzhi Zhao yue kang College of Chemistry&Chemical Engineering Northeast Petroleum UniversityDaqing 163318China Provincial Key Laboratory of Oil&Gas Chemical Technology Daqing 163318China Daqing Petrochemical Research Center PetroChinaDaqing 163000China

To realize the resource and high-value utilization,a new approach,named bagasse lignin(BL) used to produce aryl oxygen-containing compounds by catalytic pyrolysis over perovskite,was proposed,LaTi0.2Fe0.8O3(LTF) samples prepared by the sol-gel method(SG) and the solid-state reaction method(SS)were *** catalytic action on BL pyrolysis was performed by the test of TG-DTG and the evaluation of the fixed bed micro-reactor,the components and contents of the products were *** results show that LTF samples have cubic perovskite phase,LTF prepared by SG(LTF-SG) is porous with larger specific surface area than LTF prepared by SS(LTF-SS).During the pyrolysis of BL,the addition of LTF lowers the pyrolysis temperature and the activation energy,the contents of CO2 and CO in gaseous products reduce by 4.6%-8.0% and 30.7%-34.3%,respectively,the total content of aryl oxygencontaining compounds(including phenolics,guaiacols,syringols and phenylates) in liquid products increases from 62 wt% to more than 72 wt%,and LTF-SG shows better catalytic *** samples have nice phase and catalytic stabilities for BL pyrolysis after five successive redox cycles.

关键词： Bagasse lignin Perovskite Catalytic pyrolysis Aryl oxygen-containing compounds Titanium-substituted lanthanum ferrite Rare earths

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Exosome-functionalized magnesium-organic framework-based scaffoldswith osteogenic, angiogenic and anti-inflammatory properties foraccelerated bone regeneration

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Bioactive Materials 2022年第12期7卷 26-41页

作者： yue kang Chang Xu Ling’ao Meng Xufeng Dong Min Qi Daqing Jiang Department of Breast Surgery Cancer Hospital of China Medical University44 Xiaoheyan RoadDadong DistrictShenyang110042PR China School of Materials Science and Engineering Dalian University of Technology2 Linggong RoadGanjingzi DistrictDalian116024China

Exosomes derived from human adipose-derived stem cells (hADSCs-Exos) have shown potential as an effectivetherapeutic tool for repairing bone defects. Although metal-organic framework (MOF) scaffolds are promisingstrategies for bone tissue regeneration, their potential use for exosome loading remains unexplored. In this study,motivated by the potential advantages of hADSCs-Exos and Mg-GA MOF, we designed and synthesized anexosome-functionalized cell-free PLGA/Mg-GA MOF (PLGA/Exo-Mg-GA MOF) scaffold, taking using of thebenefits of hADSCs-Exos, Mg2+, and gallic acid (GA) to construct unique nanostructural interfaces to enhanceosteogenic, angiogenic and anti-inflammatory capabilities simultaneously. Our in vitro work demonstrated thebeneficial effects of PLGA/Exo-Mg-GA MOF composite scaffolds on the osteogenic effects in human bonemarrow-derived mesenchymal stem cells (hBMSCs) and angiogenic effects in human umbilical endothelial cells(HUVECs). Slowly released hADSCs-Exos from composite scaffolds were phagocytosed by co-cultured cells,stabilized the bone graft environment, ensured blood supply, promoted osteogenic differentiation, and acceleratedbone reconstruction. Furthermore, our in vivo experiments with rat calvarial defect model showed thatPLGA/Exo-Mg-GA MOF scaffolds promoted new bone formation and satisfactory osseointegration. Overall, weprovide valuable new insights for designing exosome-coated nanocomposite scaffolds with enhanced osteogenesisproperty.

关键词： Metal-organic framework Exosomes Magnesium ions Gallic acid Osteogenesis Angiogenesis Anti-inflammation Rat calvarial defect model Bone regeneration

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