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In-depth understanding of transport behavior of sulfided nano zerovalent iron/reduced graphene oxide@guar gum slurry: Stability and mobility

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Journal of Environmental Sciences 2024年第10期144卷 1-14页

作者： Yuheng Ma Wenhui You zijiang yang Zhongyu Ren Qi Jing Faculty of Architecture Civil and Transportation EngineeringBeijing University of TechnologyBeijing 100124China

Nanoscale zero-valent iron(NZVI),which has the advantages of small particle size,large specific surface area,and high reactivity,is often injected into contaminated aquifers in the form of ***,the prone to passivation and agglomeration as well as poor stability andmobility of NZVI limit the further application of this technology in ***,sulfided NZVI loaded on reduced graphene oxide(S-NZVI/rGO)and guar gum(GG)with shearthinning properties as stabilizers were used to synthesize S-NZVI/rGO@GG ***,TEM,and FT-IR confirmed that the dispersion and anti-passivation of NZVI were optimized in the coupled *** stability and mobility of the slurry were improved by increasing the GG concentration,enhancing the pH,and decreasing the ionic strength and the presence of Ca^(2+)ions,respectively.A modified advection-dispersion equation(ADE)was used to simulate the transport experiments considering the strain and physicochemical deposition/***,colloidal filtration theory(CFT)demonstrated that Brownian motion plays a dominant role in themigration of S-NZVI/rGO@GG slurry,and the maximummigration distance can be increased by appropriately increasing the injection ***-Derjaguin-Landau-Verwey-Overbeek(XDLVO)theory showed that the excellent stability and migration of S-NZVI/rGO@GG slurry mainly came from the GG spatial *** study has important implications for the field injection of S-NZVI/rGO@GG *** to the injection parameters,the injection range of S-NZVI/rGO@GG slurry is effectively controlled,which lays the foundation for the promotion of application in actual fields.

关键词： S-NZVI rGO Guar gum Transport Stability

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Diffusion logistic regression algorithms over multiagent networks

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Control Theory and Technology 2020年第2期18卷 160-167页

作者： Yan DU Lijuan JIA Shunshoku KANAE zijiang yang School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China Department of Medical Engineering Faculty of Health ScienceJunshin Gakune UniversityFukuokaJapan Department of Intelligent Systems Engineering lbaraki University4-12-1 NakanarusawaHitachiIbaraki316-8511Japan

In this paper,a distributed scheme is proposed for ensemble learning method of bagging,which aims to address the classification problems for large dataset by developing a group of cooperative logistic regression learners in a connected ***,each weak learner/agent can share the local weight vector with its immediate neighbors through diffusion strategy in a fully distributed manner Our diffusion logistic regression algorithms can effectively avoid overfitting and obtain high classification accuracy compared to the non-cooperation ***,simulations with a real dataset are given to demonstrate the effectiveness of the proposed methods in comparison with the centralized one.

关键词： Logistic regression bagging diffusion strategy connected network

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State-to-state integral cross sections and rate constants for the N^(+)(3P)+HD→NH^(+)/ND^(+)+D/H reaction:Accurate quantum dynamics studies

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Chinese Physics B 2022年第9期31卷 111-117页

作者： Hanghang Chen zijiang yang Maodu Chen Key Laboratory of Materials Modification by Laser Electronand Ion Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China

The reactive collisions of nitrogen ion with hydrogen and its isotopic variations have great significance in the field of ***,the state-to-state quantum time-dependent wave packet calculations of N^(+)(3P)+HD→NH^(+)/ND^(+)+D/H reaction are carried out based on the recently developed potential energy surface[***.2122203(2019)].The integral cross sections(ICSs)and rate coefficients of both channels are precisely determined at the state-to-state *** results of total ICSs and rate coefficients present a dramatic preference on the ND+product over the NH^(+)product,conforming to the long-lived complex-forming *** state-resolved ICSs indicate that both the product molecules are difficult to excite to higher vibrational states,and the ND^(+)product has a hotter rotational state ***,the integral cross sections and rate coefficients are precisely determined at the state-to-state level and insights are provided about the differences between the two *** present results would provide an important reference for the further experimental studies at the finer level for this interstellar chemical *** datasets presented in this paper,including the ICSs and rate coefficients of the two products for the title reaction,are openly available at https://***/10.57760/sciencedb.j00113.00034.

关键词： quantum dynamics integral cross sections rate coefficients

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Quantum dynamics studies on the non-adiabatic effects of H+LiD reaction

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Frontiers of physics 2023年第3期18卷 183-191页

作者： Yuwen Bai zijiang yang Bayaer Buren Ye Mao Maodu Chen Key Laboratory of Materials Modification by Laser Electronand Ion Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China

After the Big Bang,chemical reactions of hydrogen with LiH and its isotopic variants played an important role in the late stage of ***,these reactions have attracted the attention of experts in the field of molecular dynamics because of its simple *** non-adiabatic effects play a key role in many chemical reactions,while the related studies in LiH2 reactive system and its isotopic variants are not enough,so the microscopic mechanism of this system has not been fully *** this work,the microscopic mechanism of H+LiD reaction are performed by comparing both the adiabatic and non-adiabatic results to study the non-adiabatic *** reactivity of R1(H+LiD→Li+HD)channel is inhibited,while that of R2(H+LiD→D+LiH)channel is enhanced when the non-adiabatic couplings are *** R1 channel,a direct stripping process dominates this channel and the main reaction mechanism is not influenced by the non-adiabatic *** R2 channel,at relatively low collision energy,the dominance changes from a rebound process to the complex-forming mechanism when the non-adiabatic effects are considered,whereas the rebound collision approach still dominates the reaction at relatively high collision energy in both *** presented results provide a basis for further detailed study on this importantly astrophysical reaction system.

关键词： non-adiabatic effects quantum dynamics time-dependent wave packet astrophysical reaction

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Optimization based accurate scheduling for generation and reserve of power system

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Science China(Technological Sciences) 2012年第1期55卷 223-232页

作者： GAO YunLong PAN JinYan yang zijiang GAO Feng JI GuoLi Department of Automation Xiamen University Xiamen 361005 China SKLMS Labo atory Xi＇an Jiaotong University Xi＇an 710049 China College oflnformation Engineering Jimei University Xiamen 361021 China School oflnformation Technology York University Toronto Canada M3J 1P3 Canada

With the improvement of electricity markets,the gradual aggravation of energy shortage and the environment pollution,it is urgent to formulate a new model to precisely satisfy the system demand for energy and ***,power system opti-mization dispatching is always formulated as a discrete-time scheduling *** this paper,we first demonstrate through an example that the upper and lower bounds of spinning reserve offered by a unit,given in the discrete-time model framework as constraints,is *** causes the problem that the reserve delivery obtained by the discrete-time scheduling model cannot be carried out *** the detailed analysis of the ramp rate constraints,it is proved that the reachable upper and lower bounds of spinning reserve in every period can be expressed as functions of two variables,i.e.,generation level of unit at the start and end of this ***,a new method is provided to calculate the upper and lower bounds of spinning reserve which are reachable in ***,a new model based on this proposed method for joint scheduling of generation and reserve is presented,which considers the ability to realize the scheduled energy and reserve *** converts the opti-mization based accurate scheduling for generation and reserve of power system from a continuous-time optimal control prob-lem to a nonlinear programming ***,the proposed model can avoid the difficulties in solving a continu-ous-time optimal control *** on the sequential quadratic programming method,numerical experiments for sched-uling electric power production systems are performed to evaluate the model and the results show that the new model is highly effective.

关键词： power system scheduling continuous-time scheduling model precisely reachable up and down spinning reserve sequentialquadratic programming

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Automatic Buffer Overflow Warning Validation

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Journal of Computer Science & Technology 2020年第6期35卷 1406-1427页

作者： Feng-Juan Gao Yu Wang Lin-Zhang Wang zijiang yang Xuan-Dong Li State Key Laboratory for Novel Software Technology Nanjing UniversityNanjing 210023China Department of Computer Science and Technology Nanjing UniversityNanjing 210023China Department of Computer Science Western Michigan UniversityKalamazoo 49008-5466U.S.A.

Static buffer overflow detection techniques tend to report too many false positives fundamentally due to the lack of software execution information. It is very time consuming to manually inspect all the static warnings. In this paper, we propose BovInspector, a framework for automatically validating static buffer overflow warnings and providing suggestions for automatic repair of true buffer overflow warnings for C programs. Given the program source code and the static buffer overflow warnings, BovInspector first performs warning reachability analysis. Then, BovInspector executes the source code symbolically under the guidance of reachable warnings. Each reachable warning is validated and classified by checking whether all the path conditions and the buffer overflow constraints can be satisfied simultaneously. For each validated true warning, BovInspector provides suggestions to automatically repair it with 11 repair strategies. BovInspector is complementary to prior static buffer overflow discovery schemes. Experimental results on real open source programs show that BovInspector can automatically validate on average 60% of total warnings reported by static tools.

关键词： buffer overflow static analysis warning symbolic execution automatic repair

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Bias-Compensated LMS Algorithm for Sparse Systems over Adaptive Network 36

Bias-Compensated LMS Algorithm for Sparse Systems over Adapt...

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第36届中国控制会议

作者： Wenxuan Han Lijuan Jia Shunshoku Kanae zijiang yang School of Information and Electronics Beijing Institute of Technology Fukui University of Technology Ibaraki University

ISBN: (纸本)9781538629185

We propose bias-compensated algorithms based on the RZA-LMS algorithm and diffusion RZA-LMS *** proposed algorithms improve the accuracy of estimation under the situation that input of the adaptive filter contains *** methods of the input noise’ variance are given for implementing our single-node and diffusion biascompensated *** results show that the proposed algorithms have better accuracy than algorithms without bias-compensation and the estimation results are unbiased under different noise levels.

关键词： Bias-compensation least mean squares sparse system diffusion networks adaptive networks

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Variation of microbiological and small molecule metabolite profiles of Nuodeng ham during ripening by high-throughput sequencing and GC-TOF-MS

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Food Science and Human Wellness 2024年第4期13卷 2187-2196页

作者： Cong Li Yingling Zou Guozhou Liao zijiang yang Dahai Gu Yuehong Pu Changrong Ge Guiying Wang Livestock Product Processing and Engineering Technology Research Center of Yunnan Province Yunnan Agricultural UniversityKunming 650201China College of Food Science and Technology Yunnan Agricultural UniversityKunming 650201China

The internal microbial diversity and small molecular metabolites of Nuodeng ham in different processing years(the first,second and third year sample)were analyzed by high-throughput sequencing technology and gas chromatography-time of flight mass spectrography(GC-TOF-MS)to study the effects of microorganisms and small molecular metabolites on the quality of ham in different processing *** results showed that the dominant bacteria phyla of Nuodeng ham in different processing years were Proteobacteria and Firmicutes,the dominant fungi phyla were Ascomycota and Basidiomycota,while Staphylococcus and Aspergillus were the dominant bacteria and fungi of Nuodeng ham,***,252 kinds of small molecular metabolites were identified from Nuodeng ham in different processing years,and 12 different metabolites were screened through multivariate statistical *** metabolic pathway analysis showed that 23 metabolic pathways were related to ham fermentation,of which 8 metabolic pathways had significant effects on ham fermentation(Impact>0.01,P<0.05).The content of L-proline,phenyllactic acid,L-lysine,carnosine,taurine,D-proline,betaine and creatine were significantly positively correlated with the relative abundance of Staphylococcus and Serratia,but negatively correlated with the relative abundance of Halomonas,Aspergillus and Yamadazyma.

关键词： Nuodeng ham Microbial diversity Small molecule metabolites High-throughput sequencing Gas chromatography-time of flight mass spectrography

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Improving modeling of low-altitude particulate matter emission and dispersion:A cotton gin case study

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Journal of Environmental Sciences 2023年第11期133卷 8-22页

作者： zijiang yang Michael N.Evans Michael D.Buser Cathleen J.Hapeman Alba Torrents Derek P.Whitelock Department of Civil and Environmental Engineering University of Maryland College Park1173 Glenn L.Martin HallCollege ParkMaryland 20742United States Department of Geology University of Maryland College Park1212B Chemistry BuildingCollege ParkMaryland 20742United States Earth System Science Interdisciplinary Center 1120 Geology BuildingUniversity of MarylandCollege ParkMaryland 20742United States United States Department of Agriculture Agricultural Research ServiceOffice of National Programs5601 Sunnyside Ave(GWCC 4–2282)BeltsvilleMaryland 20705United States United States Department of Agriculture Agricultural Research ServiceHenry A.Wallace Beltsville Agricultural Research Center10300 Baltimore AvenueBeltsvilleMaryland 20705United States United States Department of Agriculture Agricultural Research ServiceSouthwestern Cotton Ginning Research LaboratoryPO Box 578Mesilla ParkNew Mexico 88047United States

Monitoring and modeling of airborne particulate matter(PM)from low-altitude sources is becoming an important regulatory target as the adverse health consequences of PM become better ***,application of models not specifically designed for simulation of PM from low-altitude emissions may bias *** address this problem,we describe the modification and validation of an air dispersion model for the simulation of lowaltitude PM dispersion from a typical cotton ginning *** found that the regulatory recommended model(AERMOD)overestimated pollutant concentrations by factors of 64.7,6.97 and 7.44 on average for PM 2.5,PM 10,and TSP,*** concentrations were negatively correlated with height(p<0.05),distance from source(p<0.05)and standard deviation of wind direction(p<0.001),and positively correlated with average wind speed(p<0.001).Based on these results,we developed dispersion correction factors for AERMOD and cross-validated the revised model against independent observations,reducing overestimation factors to 3.75,1.52 and 1.44 for PM 2.5,PM 10 and TSP,*** reductions in model error may be obtained from use of additional observations and refinement of dispersive correction *** generally,the correction permits the validated adjustment and application of pre-existing models for risk assessment and development of remediation *** same approach may also be applied to improve simulations of other air pollutants and environmental conditions of concern.

关键词： Air quality Particulate matter Air dispersion modelling Cotton gin

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Comparative genomics reveals the diversification of triterpenoid biosynthesis and origin of ocotilloltype triterpenes in Panax

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Plant Communications 2023年第4期4卷 271-285页

作者： zijiang yang Xiaobo Li Ling yang Sufang Peng Wanling Song Yuan Lin Guisheng Xiang Ying Li Shuang Ye Chunhua Ma Jianhua Miao Guanghui Zhang Wei Chen Shengchao yang yang Dong National&Local Joint Engineering Research Center on Germplasm Innovation&Utilization of Chinese Medicinal Materials in Southwest China Yunnan Agricultural UniversityKunmingChina The Key Laboratory of Medicinal Plant Biology of Yunnan Province Yunnan Agricultural UniversityKunmingChina College of Food Science and Technology Yunnan Agricultural UniversityKunmingChina Guangxi Key Laboratory of Medicinal Resources Protection and Genetic Improvement Guangxi Botanical Garden of Medicinal PlantsNanningChina Yunnan Plateau Characteristic Agriculture Industry Research Institute KunmingChina

Gene duplication is assumed to be the major force driving the evolution of metabolite biosynthesis in *** from functional burdens,duplicated genes can mutate toward novelties until fixed due to selective ***,the extent to which this mechanism has driven the diversification of metabolite biosynthesis remains to be *** we performed comparative genomics analysis and functional characterization to evaluate the impact of gene duplication on the evolution of triterpenoid biosynthesis using Panax species as *** that whole-genome duplications(WGDs)occurred independently in Araliaceae and Apiaceae *** genomics revealed the evolutionary trajectories of triterpenoid biosynthesis in plants,which was mainly promoted by WGDs and tandem *** synthase(LAS)was likely derived from a tandemduplicate of cycloartenol synthase that predated the emergence of *** episodic diversifying selection,the LAS gene duplicates produced by g whole-genome triplication have given rise to triterpene biosynthesis in core eudicots through ***,functional characterization revealed that oxidosqualene cyclases(OSCs)responsible for synthesizing dammarane-type triterpenes in Panax species were also capable of producing ocotilloltype *** and biochemical evidence suggested that Panax genes encoding the above OSCs originated from the specialization of one OSC gene duplicate produced from a recent WGD shared by Araliaceae(Pg-b).Our results reveal the crucial role of gene duplication in diversification of triterpenoid biosynthesis in plants and provide insight into the origin of ocotillol-type triterpenes in Panax species.

关键词： gene duplication Panax genomes whole-genome duplications triterpenoid biosynthesis ocotilloltype triterpenes specialization

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