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Data-driven evacuation and rescue traffic optimization with rescue contraflow control

Journal of Safety Science and Resilience 2024年第1期5卷 1-12页

作者： Zheng liu Jialin liu Xuecheng Shang xingang li School of Management Engineering Zhengzhou University of AeronauticsZhengzhou 450046China Collaborative Innovation Center for Aviation Economy Development of Henan Province Zhengzhou University of AeronauticsZhengzhou 450046China School of Systems science Beijing Jiaotong UniversityBeijing 100044China Key Laboratory of Transport Industry of Big Data Application Technologies for Comprehensive Transport Beijing Jiaotong UniversityBeijing 100044China School of Transportation Engineering Shandong Jianzhu UniversityJinan 250101China

In response to local sudden disasters,e.g.,high-rise office or residential building fire disasters,road occupation can cause conflicts,and traffic directions may be opposite between evacuation vehicles and rescue vehicles;moreover,lane contraflow can be adopted to meet these surge traffic demands.However,lane contraflow that provides more roads for rescue vehicles reduces the traffic supply in the evacuation direction.It is unclear how to control the number of contraflow roads used by rescue vehicles to coordinate evacuation and rescue traffic operations.Here,we adjust the critical rescue traffic volume of reversing the normal road traffic direction to control rescue contraflow.Additionally,we propose a multiobjective mixed integer linear programming formulation for evacuation and rescue traffic optimization.Additionally,considering that the upper limit of the critical rescue traffic volume is unknown and that the proposed formulation includes multiple objectives and multi-priority vehicle classes,a three-stage solving algorithm is developed.Next,a large-scale evacuation and rescue traffic optimization result dataset is obtained for the Nguyen–Dupuis road network,and the impact of different rescue contraflow control plans on evacuation and rescue traffic is studied based on data-driven sta-tistical analysis.The results show that by adjusting the optimal rescue traffic route,the critical rescue traffic volume for reversing the normal road traffic direction can reduce the interference of rescue traffic to evacuation traffic operation performance without reducing rescue traffic operation performance,and can be used to coor-dinate evacuation and rescue traffic operation under rescue contraflow.

关键词： Evacuation and rescue traffic optimization Rescue contraflow control Multiobjective mixed integer linear programming Three-stage solving algorithm Data-driven statistical analysis

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Boosting Fischer-Tropsch Synthesis via Tuning of N Dopants in TiO_(2)@CN-Supported Ru Catalysts

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Transactions of Tianjin University 2024年第1期30卷 90-102页

作者： Xincheng li Yunhao liu Dejian Zhao Shuaishuai Lyu Jingwei Ye Xiaoshen li Peipei Wu Ye Tian Yingtian Zhang Tong Ding Song Song Qingpeng Cheng xingang li State Key Laboratory of Chemical Engineering Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Haihe Laboratory of Sustainable Chemical TransformationsTianjin Key Laboratory of Applied Catalysis Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Zhejiang Institute of Tianjin University Shaoxing 312300China Sinopec Research Institute of Petroleum Processing Co. LTDBeijing 100083China Physical Sciences and Engineering Division Advanced Membranes and Porous Materials(AMPM)CenterKing Abdullah University of Science and Technology(KAUST)23955-6900 ThuwalSaudi Arabia

Nitrogen(N)-doped carbon materials as metal catalyst supports have attracted signifi cant attention,but the eff ect of N dopants on catalytic performance remains unclear,especially for complex reaction processes such as Fischer-Tropsch synthesis(FTS).Herein,we engineered ruthenium(Ru)FTS catalysts supported on N-doped carbon overlayers on TiO_(2)nanoparticles.By regulating the carbonization temperatures,we successfully controlled the types and contents of N dopants to identify their impacts on metal-support interactions(MSI).Our fi ndings revealed that N dopants establish a favorable surface environment for electron transfer from the support to the Ru species.Moreover,pyridinic N demonstrates the highest electron-donating ability,followed by pyrrolic N and graphitic N.In addition to realizing excellent catalytic stability,strengthening the interaction between Ru sites and N dopants increases the Ru^(0)/Ru^(δ+)ratios to enlarge the active site numbers and surface electron density of Ru species to enhance the strength of adsorbed CO.Consequently,it improves the catalyst’s overall performance,encompassing intrinsic and apparent activities,as well as its ability for carbon chain growth.Accordingly,the as-synthesized Ru/TiO_(2)@CN-700 catalyst with abundant pyridine N dopants exhibits a superhigh C_(5+)time yield of 219.4 mol CO/(mol Ru·h)and C_(5+)selectivity of 85.5%.

关键词： Fischer-Tropsch synthesis N-doped carbon materials Ruthenium catalyst Pyridinic N Metal-N interaction

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Design and optimization of reactive distillation: a review

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Frontiers of Chemical Science and Engineering 2022年第6期16卷 799-818页

作者： Chang Shu xingang li Hong li Xin Gao School of Chemical Engineering and Technology National Engineering Research Center of Distillation TechnologyCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072China

Reactive distillation process,a representative process intensification technology,has been widely applied in the chemical industry.However,due to the strong interaction between reaction and separation,the extension of reactive distillation technology is restricted by the difficulties in process analysis and design.To overcome this problem,the design and optimization of reactive distillation have been widely studied and illustrated for plenty of reactive mixtures over the past three decades.These design and optimization methods of the reactive distillation process are classified into three categories:graphical,optimization-based,and evolutionary/heuristic methods.The primary objective of this article is to provide an up-to-date review of the existing design and optimization methods.Desired and output information,advantages and limitations of each method are stated,the modification and development for original methodologies are also reviewed.Perspectives on future research on the design and optimization of reactive distillation method are proposed for further research.

关键词： reactive distillation process intensification design method reactive phase diagram optimization algorithm

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A generalized CFD model for evaluating catalytic separation process in structured porous materials

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Chinese Journal of Chemical Engineering 2022年第11期51卷 168-177页

作者： Anshi Hong Zisheng Zhang xingang li Xin Gao School of Chemical Engineering and Technology National Engineering Research Center of Distillation TechnologyCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072China Department of Chemical and Biological Engineering University of OttawaOttawa K1N 6N5Canada

A hybrid multiphase model is developed to simulate the simultaneous momentum, heat and mass transfer and heterogeneous catalyzed reaction in structured catalytic porous materials. The approach relies on the combination of the volume of fluid(VOF) and Eulerian–Eulerian models, and several plug-in field functions. The VOF method is used to capture the gas–liquid interface motion, and the Eulerian–Eulerian framework solves the temperature and chemical species concentration equations for each phase.The self-defined field functions utilize a single-domain approach to overcome convergence difficulty when applying the hybrid multiphase for a multi-domain problem. The method is then applied to investigate selective removal of specific species in multicomponent reactive evaporation process. The results show that the coupling of catalytic reaction and interface species mass transfer at the phase interface is conditional, and the coupling of catalytic reaction and momentum transfer across fluid–porous interface significantly affects the conversion rate of reactants. Based on the numerical results, a strategy is proposed for matching solid catalyst with operating condition in catalytic distillation application.

关键词： CFD(computational fluid dynamics) Hybrid multiphase model SiC foam Mass transfer Catalytic distillation

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Bus evacuation during no-notice disasters in downtown areas: A case study of the Zhongguancun area, Beijing

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Journal of Safety Science and Resilience 2022年第3期3卷 235-242页

作者： xingang li Xiaodan Cui Rui Jiang Bin Jia Key Laboratory of Transport Industry of Big Data Application Technologies for Comprehensive Transport Beijing Jiaotong UniversityBeijing 100044China

This paper focuses on the bus evacuation problem with pedestrians’short-distance walking ability between bus stations during no-notice disasters in downtown areas.A mixed-integer linear programming model is proposed to solve this problem.The objective function is to minimize the evacuation time and number of casualties.The model obtains the flow of evacuees and buses on each arc to the route of buses in the process of evacuation.Furthermore,a real-time bus evacuation demand estimation method is proposed based on smart card data.Finally,the example of Zhongguancun area in Beijing is used to verify the practicality and validity of the model.The results show that pedestrian short-distance walking can effectively reduce casualties and improve the utilization rate of buses.

关键词： No-notice disaster Bus evacuation Short-distance walking Mixed integer linear programming

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Comprehensive analysis of antibacterial and anti-hepatoma activity of metabolites from jujube fruit

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Food Bioscience 2022年第3期47卷 474-483页

作者： Qianqian Shi Xi li Dajun Zhu Junjun Jiang xingang li College of Forestry Northwest A&F UniversityYangling712100ShaanxiChina Key Comprehensive Laboratory of Forestry of Shaanxi Province Northwest A&F UniversityYangling712100ShaanxiChina Research Center for Jujube Engineering and Technology of State Forestry Administration Northwest A&F UniversityYangling712100ShaanxiChina

Jujube is one of the most produced dried fruits in China,and it is also a traditional Chinese medicine that enhances immunity and has anti-cancer activity.Jujube fruit is rich in phenolic compounds,but few reports are available on its biological activities.To evaluate the biological activities of the phenolic compounds in dried jujube fruit,the composition and content of metabolites in dried jujube fruit were determined by metabolomics,and the antibacterial and anticancer activities of the phenolic compounds were analyzed in dried jujube fruit.The results showed that 463 compounds were identified in dried‘Junzao’fruit,including 102 phenolic compounds.The in vitro activity test showed that the jujube phenolic metabolites had extensive antibacterial effects and caused disruption and nuclear sclerosis of hepatocellular carcinoma(HepG2)cells.Canonical correlation analysis showed that total phenolic content,quercetin-3-rutinose,and procyanidin B1 were the main active antibacterial and anticancer components.The study provides data supporting the application of dried jujube fruit in the development of functional foods,pharmaceuticals and cosmetics.

关键词： Anticancer activity HepG2 cell Phenolic metabolites Chinese jujube Pharmaceutical development

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Thermodynamics fundamentals and energy efciency for the separation and high‑valued utilization of Fischer–Tropsch heavy oil

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International Journal of Coal Science & Technology 2022年第4期9卷 59-70页

作者： Zongchao liu Hong li Suli liu Jiuzhou Chen Zisheng Zhang xingang li Angui Zhang Wei Yuan Xin Gao School of Chemical Engineering and Technology National Engineering Research Center of Distillation TechnologyTianjin UniversityTianjin 300072China Ningxia Coal Industry Group Co.Ltd. CHN ENERGYYinchuan 750011China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Department of Chemical and Biological Engineering University of OttawaOttawa K1N 6N5Canada

The development trend of Fischer–Tropsch(F–T)technology is to develop high value-added products.The separation of linearα-olefns with low cost is an efective method.Nevertheless,the lack of thermodynamic data and the huge energy consumption are the two main problems restricting the development of the separation process.The thermodynamic data of the key components(1-dodecene and n-dodecane)in the F–T product were measured.The Wilson binary interaction parameters of the key components were obtained.Next,one traditional distillation column sequence and two dividing wall column(DWC)sequences were designed to separate the F–T heavy oil to obtain narrow fractions with diferent carbon numbers.Then,the obtained fractions of C10 and C12 were simulated to obtain 1-decene and 1-dodecene,respectively.There was a traditional distillation and a diferential pressure thermal coupling distillation process.When separating 95.0%purity 1-decene and 1-octene,the direct DWC process and diferential pressure thermal coupled distillation are an excellent combination,which can reduce the energy by 33.1%(i.e.,11,286 kW)and total annual cost by 15.9%(i.e.,3.96×10^(6)$)compared with traditional distillation.

关键词： F-T synthesis α-Olefns DWC Heat-integrated distillation Process design

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Metal-Support Interactions on Ag/Co_(3)O_(4)Nanowire Monolithic Catalysts Promoting Catalytic Soot Combustion

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Transactions of Tianjin University 2022年第3期28卷 174-185页

作者： Xingwang Yi Yuexi Yang Dawei Xu Ye Tian Song Song Chunmei Cao xingang li School of Chemical Engineering&Technology Tianjin UniversityTianjin 300350China Institute of Shaoxing Tianjin UniversityShaoxing 312000China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin Key Laboratory of Applied Catalysis Science and EngineeringTianjin UniversityTianjin 300350China School of Chemical Engineering Zhengzhou UniversityZhengzhou 45000China

Tuning metal-support interactions(MSIs)is an important strategy in heterogeneous catalysis to realize the desirable metal dispersion and redox ability of metal catalysts.Herein,we use pre-reduced Co_(3)O_(4)nanowires(Co-NWs)in situ grown on monolithic Ni foam substrates to support Ag catalysts(Ag/Co-NW-R)for soot combustion.The macroporous structure of Ni foam with crossed Co_(3)O_(4)nanowires remarkably increases the soot-catalyst contact effi ciency.Our characterization results demonstrate that Ag species exist as Ag 0 because of the equation Ag^(+)+Co^(2+)=Ag^(0)+Co^(3+),and the pre-reduction treatment enhances interactions between Ag and Co_(3)O_(4).The number of active oxygen species on the Ag-loaded catalysts is approximately twice that on the supports,demonstrating the signifi cant role of Ag sites in generating active oxygen species.Additionally,the strengthened MSI on Ag/Co-NW-R further improves this number by increasing metal dispersion and the intrinsic activity determined by the turnover frequency of these oxygen species for soot oxidation compared with the catalyst without pre-reduction of Co-NW(Ag/Co-NW).In addition to high activity,Ag/Co-NW-R exhibits high catalytic stability and water resistance.The strategy used in this work might be applicable in related catalytic systems.

关键词： Metal-support interaction Monolithic catalysts Ag Co_(3)O_(4)nanowires Soot oxidation

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(Tn5-)FISH-based imaging in the era of 3D/spatial genomics

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Biophysics Reports 2023年第1期9卷 15-25页

作者： liheng Yang Yan Yan Jun lin li Cheng Zhou Jinlan Jin Tongmei Zhang Haokaifeng Wu xingang li Wei Wang li Yuan Xu Zhang Juntao Gao Key Laboratory of Biological Targeting Diagnosis Therapy and Rehabilitation of Guangdong Higher Education Institutes The Fifth Affiliated Hospital of Guangzhou Medical University Centre for Precision Health Edith Cowan University Beijing Institute of Collaborative Innovation Institute for TCM-X Seaver College Pepperdine University Center for Synthetic & Systems Biology Tsinghua University 3. Bioinformatics Division BNRist Department of Automation MOE Key Laboratory of Bioinformatics Savaid Medical School University of Chinese Academy of Sciences Department of Radiation Oncology Nanfang Hospital Southern Medical University Department of Critical Care Medicine Shenzhen Hospital (Futian) of Guangzhou University of Chinese Medicine 8. Medical Oncology Beijing Chest Hospital Capital Medical University & Beijing Tuberculosis and Thoracic Tumor Research Institute Centre for Regenerative Medicine and Health Hong Kong Institute of Science & Innovation Chinese Academy of Sciences

3D genomics mainly focuses on the 3D position of single genes at the cell level, while spatial genomics focuses more on the tissue level. In this exciting new era of 3D/spatial genomics, half-century old FISH and its derivative methods, including Tn5-FISH, play important roles. In this review, we introduce the Tn5-FISH we developed recently, and present six different applications published by our collaborators and us, based on(Tn5-)FISH, which can be either general BAC clone-based FISH or Tn5-FISH. In these interesting cases,(Tn5-)FISH demonstrated its vigorous ability of targeting sub-chromosomal structures across different diseases and cell lines(leukemia, m ESCs(mouse embryonic stem cells), and differentiation cell lines). Serving as an effective tool to image genomic structures at the kilobase level,Tn5-FISH holds great potential to detect chromosomal structures in a high-throughput manner, thus bringing the dawn for new discoveries in the great era of 3D/spatial genomics.

关键词： Tn5-FISH Molecular imaging Chromatin interaction Regulatory elements

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Combining bioactive compounds and antioxidant activity profiling provide insights into assessment of geographical features of Chinese jujube

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Food Bioscience 2022年第2期46卷 605-616页

作者： Cheng Wang Rui Wang Chendan Fu Xiaoxuan Jiang xingang li Gang Han Jingfang Zhang Department of Forestry Engineering College of ForestryNorthwest A&F UniversityYanglingShaanxi712100China Center for Jujube Engineering and Technology of State Forestry Administration Northwest A&F UniversityYanglingShaanxi712100China

As the largest jujube cultivating areas of the world,the market price and quality of Chinese jujube are obviously affected by its producing regions in China.Therefore,traceability of Chinese jujube has become an important issue.To search the suitable geographical labels of Chinese jujube,26 major cultivars from five geographical regions of China were investigated by evaluating their bioactive compounds and antioxidant activity profiling.Multivariate statistical techniques(e,g.,PCA,PLS,VIP value)applied to the above-obtained data were further used to identify geographical origin in different areas of Chinese jujube.The results indicated that the highest median contents of total phenols(TP)and flavonoids(TF)of Chinese jujube were originated from Ningxia and Henan provinces,both of which also exhibited the stronger bioactivity.p-Hydroxybenzoic acid and rutin exhibited the highest contents among the all detected individual phenolic compounds.The highest median contents of cyclic adenosine monophosphate(cAMP),cyclic guanosine monophosphate(cGMP)and polysaccharides were all found in Chinese jujube samples of Xinjiang province.In particular,p-hydroxybenzoic acid,rutin,cAMP,cGMP and polysaccharides can be regarded as the potential biomarkers in distinguishing the geographical origin of Chinese jujube.Additionally,the high altitude and latitude might be benefit for the accumulation of cAMP,cGMP and polysaccharides(primary metabolites),and high longitude and annual precipitation maybe improve the contents of TP and TF(secondary metabolites).These information could provide an effective methods in distinguishing the geographical features of Chinese jujube,and also be benefit for the products development.

关键词： Chinese jujube Geographical features Bioactive constituents Antioxidant activity

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