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Urban stormwater disinfection, quality variability during storage and influence on the freshwater algae: Implications for reuse safety

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Journal of Environmental Sciences 2023年第2期124卷 655-666页

作者： Shanshan Fan gang Wen An Liu College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China Shaanxi Key Laboratory of Environmental Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Water Science and Environmental Engineering Research Center College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China

Stormwater reuse is one of the most important ways to mitigate water resource ***,urban stormwater contains many bacteria species,which threaten the reuse ***,stormwater disinfection is highly *** disinfection has been widely conducted in the drinking water and reclaimed water,it is rarely carried out for *** study collected the roof stormwater and undertook chlorination *** typical bacteria,Escherichia coli(***)and Staphylococcus aureus(***)were selected in this study to investigate the disinfection *** is found that bacteria species present in the stormwater had an important influence on disinfection efficiency while the original stormwater quality did not show an obvious ***,when the disinfected stormwater was stored,the stormwater quality was highly variable during its storage process and the variability was affected by bacteria *** *** containing stormwater showed a high variability of quality and *** significantly ***,the *** containing stormwater quality had a relatively low variability and *** did not significantly ***,it is noted that after storage,the dissolved form of stormwater was more positive to the freshwater algae’s growth while the particulate form(including bacteria and other particulate matters)was *** implies that a further treatment such as filtration is needed before the stored stormwater is recharged into receiving waters in order to remove particulate *** research outcomes can provide useful insight to effective stormwater disinfection and ensure reuse safety.

关键词： Stormwater quality Stormwater disinfection Stormwater storage Stormwater reuse Escherichia coli Staphylococcus aureus

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Charge-state populations for the neon-XFEL system

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Chinese Physics b 2019年第6期28卷 155-163页

作者： Ping Deng gang Jiang Institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610065China Key Laboratory of High Energy Density Physics and Technology Ministry of EducationChengdu 610065China

The interaction between neon and x-ray free-electron lasers with different laser parameters is systematically studied by solving a set of coupled rate equations. As an example, the evolution of 1s^12 s^22 p^6 configuration is given under different incident photon numbers, pulse widths, and photon energies. We have also determined all of the charge-state populations as a function of three laser pulse parameters by averaging over time. The result shows that the variations of these charge-state populations demonstrate a pattern when the pulse width is shorter than 10 fs: some of the charge-states decrease rapidly,while the others rise but remain relatively constant for pulse width larger than 10 fs. The variation of the average charge with three parameters has also obtained. The average charge decreases for a pulse width shorter than 10 fs but remains basically unchanged for a pulse width longer than 10 fs.

关键词： x-ray free electron lasers neon charge-state population pulse width

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Synthesis and Structural Characterization of a Salt {[Co(Phen)_3][Mo_2S_2(μ-S)_2(edt)_2]}_2·(DMSO)_2·(Et_2O)(Phen = 1,10-Phenanthroline, edt=Ethane-1,2-dithiolate)

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Chinese Journal of Structural Chemistry 2005年第7期24卷 773-778,736页

作者： ZHANGWen-Hua RENZhi-gang ZHANGYong SchoolofChemistryandChemicalEngineering SuzhouUniversit） Suzhou215006 China

Reaction of [Et4N]2[Mo2S2(μ-S)2(edt)2] with CoCl2?6H2O and Phen in MeCN followed by recrystallization in DMSO/Et2O gave rise to dark-red block crystals of {[Co(Phen)3]- [Mo2S2(μ-S)2(edt)2]}2?(DMSO)2?(Et2O) 1 (C88H86Co2Mo4N12O3S18). 1 crystallizes in the monoclinic system, space group P21/c with a = 24.631(4), b = 16.117(3), c = 24.791(4) ?, β = 92.835o, V = 9829.3(3) ?3, Z = 4, Mr = 2438.57, Dc = 1.648 g/cm3, F(000) = 4928, μ = 12.61 cm-1, R = 0.0936 and wR = 0.1682 for 12998 observed reflections with I > 2.0σ(I). In the structure of 1, the Co atom of the [Co(Phen)3]2+ dication is octahedrally coordinated by three Phen ligands. The Mo atom of the [Mo2S2(μ-S)2(edt)2]2- dianion is coordinated by two μ-S, one terminal S and two S atoms from edt, forming a distorted square pyramidal geometry. The mean Co–N and Mo…Mo bond distances are 2.139 and 2.872 ?, respectively.

关键词： molybdenum cluster sulfur cobalt crystal structure synthesis

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A Whole Plant Herbaceous Angiosperm from the Middle Jurassic of China

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Acta Geologica Sinica(English Edition) 2016年第1期90卷 19-29页

作者： HAN gang LIU Zhongjian LIU Xueling MAO Limi Frederic M.b. JACQUES WANG Xin Palaeontological Center Bohai UniversityJinzhou 121013LiaoningChina Shenzhen Key Laboratory for Orchid Conservation and Utilization National Orchid Conservation Center of China and Orchid Conservation&Research Center of ShenzhenShenzhen 518114GuangdongChina State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyCASNanjing 210008China Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenCASMengla 666303YunnanChina

In contrast to woody habit with secondary growth, truthful herbaceous habit lacking secondary growth is restricted to angiosperms among seed plants. Although angiosperms might have occurred as early as in the Triassic and herbaceous habit theoretically may have been well adopted by pioneer angiosperms, pre-Cretaceous herbs are missing hitherto, leaving the origin of herbs and evolution of herbaceous angiosperms mysterious. Here we report Juraherba bodae gen. et sp. nov, a whole plant herbaceous angiosperm, from the Middle Jurassic （〉164 Ma） at Daohugou Village, Inner Mongolia, China, a fossil Lagerst^itten that is worldwide famous for various fossil finds. The angiospermous affinity of Juraherba is ensured by its enclosed ovules/seeds. The plant is small but complete, with physically connected hairy root, stem, leaves, and fructifications. The Middle Jurassic age recommends Juraherba as the earliest record of herbaceous seed plants, demanding a refresh look at the evolutionary history of angiosperms.

关键词： seed plant Jurassic herbaceous whole plant angiosperm.

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α-clustering effect on flows of direct photons in heavy-ion collisions

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Nuclear Science and Techniques 2021年第6期32卷 122-132页

作者： Chen-Zhong Shi Yu-gang Ma Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China University of the Chinese Academy of Sciences Beijing 100080China

In this study,we reconstruct theγ-photon energy spectrum,which is in good agreement with the experimental data of ^(86)Kr+^(12)C at E/A=44 Me V within the framework of the modified EQMD *** directed and elliptic flows of free protons and direct photons were investigated by considering theα-clustering structure of ^(12)*** with free protons,direct photon flows provide clearer information about the early stage of a nuclear *** difference in the collective flows between different configurations of ^(12)C is observed in this *** indicates that the collective flows of direct photons are sensitive to the initial ***,theγbremsstrahlung process might be taken as an alternative probe to investigate theα-clustering structure in a light nucleus from heavy-ion collisions within the Fermienergy region.

关键词： Nuclear reaction Direct photon Collective flow α-clustering configuration

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A Review on Representative Swarm Intelligence Algorithms for Solving Optimization Problems:Applications and Trends

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IEEE/CAA Journal of Automatica Sinica 2021年第10期8卷 1627-1643页

作者： Jun Tang gang Liu Qingtao Pan College of Systems Engineering National University of Defense TechnologyChangsha 410000China School of Information Science and Engineering Hunan Institute of Science and TechnologyYueyang 414000China

Swarm intelligence algorithms are a subset of the artificial intelligence(AI)field,which is increasing popularity in resolving different optimization problems and has been widely utilized in various *** the past decades,numerous swarm intelligence algorithms have been developed,including ant colony optimization(ACO),particle swarm optimization(PSO),artificial fish swarm(AFS),bacterial foraging optimization(bFO),and artificial bee colony(AbC).This review tries to review the most representative swarm intelligence algorithms in chronological order by highlighting the functions and strengths from 127 research *** provides an overview of the various swarm intelligence algorithms and their advanced developments,and briefly provides the description of their successful applications in optimization problems of engineering ***,opinions and perspectives on the trends and prospects in this relatively new research domain are represented to support future developments.

关键词： Ant colony optimization(ACO) artificial bee colony(AbC) artificial fish swarm(AFS) bacterial foraging optimization(bFO) optimization particle swarm optimization(PSO) swarm intelligence

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Review on artificial intelligence techniques for improving representative air traffic management capability

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Journal of Systems Engineering and Electronics 2022年第5期33卷 1123-1134页

作者： TANG Jun LIU gang PAN Qingtao College of Systems Engineering National University of Defense TechnologyChangsha 410073China School of InformationScience and Engineering Hunan Institute of Science and TechnologyYueyang 414000China

The use of artificial intelligence(AI)has increased since the middle of the 20th century,as evidenced by its applications to a wide range of engineering and science *** traffic management(ATM)is becoming increasingly automated and autonomous,making it lucrative for AI *** paper presents a systematic review of studies that employ AI techniques for improving ATM capability.A brief account of the history,structure,and advantages of these methods is provided,followed by the description of their applications to several representative ATM tasks,such as air traffic services(ATS),airspace management(AM),air traffic flow management(ATFM),and flight operations(FO).The major contribution of the current review is the professional survey of the AI application to ATM alongside with the description of their specific advantages:(i)these methods provide alternative approaches to conventional physical modeling techniques,(ii)these methods do not require knowing relevant internal system parameters,(iii)these methods are computationally more efficient,and(iv)these methods offer compact solutions to multivariable *** addition,this review offers a fresh outlook on future *** is providing a clear rationale for the model type and structure selection for a given ATM *** is to understand what makes a specific architecture or algorithm effective for a given ATM *** are among the most important issues that will continue to attract the attention of the AI research community and ATM work teams in the future.

关键词： artificial intelligence(AI) air traffic management(ATM) air traffic services(ATS) airspace management(AM) air traffic flow management(ATFM) flight operations(FO)

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A 3-color Theorem on Plane Graphs without 5-circuits

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Acta Mathematica Sinica,English Series 2007年第6期23卷 1059-1062页

作者： bao gang XU School of Math. & Computer Science Nanjing Normal University Nanjing 210097 P. R. China

In this paper, we prove that every plane graph without 5-circuits and without triangles of distance less than 3 is 3-colorable. This improves the main result of borodin and Raspaud [borodin, O. V., Raspaud, A.： A sufficient condition for planar graphs to be 3-colorable. Journal of Combinatorial Theory, Ser. b, 88, 17-27 （2003）], and provides a new upper bound to their conjecture.

关键词： plane graph circuit coloring

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Seismic resilient shear wall structures:A state-of-the-art review

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Science China(Technological Sciences) 2023年第6期66卷 1640-1661页

作者： XU gang GUO Tong LI AiQun Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education Southeast UniversityNanjing 211189China Multi-Functional Shaking Tables Laboratory Beijing University of Civil Engineering and ArchitectureBeijing 100044China

The ductile design principle has been widely adopted in seismic design of structures,so the main structural components are designed to have the dual functions of bearing and energy dissipation under the *** recent years,the intensity of major earthquakes occurred in China,Chile,New Zealand,and Japan had reached or exceeded the design level of the maximum credible *** most cases,the designed structures did not collapse and the casualties were ***,many structures were seriously damaged and must be overhauled or rebuilt,resulting in huge economic ***,researchers have paid more attention to the seismic resilient *** shear wall can provide an efficient lateral force resisting capacity and has a wide range of applications in building *** review firstly summarized the research advances of seismic resilient shear wall structures,mainly from three aspects:high-performance materials,replaceable components,and hybrid structural systems;then,the development of seismic performance analysis,design methods,and engineering applications of seismic resilient shear wall structures were presented;finally,the key issues that need to be explored in the future research were discussed,which was helpful for the wide application of seismic resilient shear wall structures.

关键词： seismic resilience shear wall self-centering structure seismic design engineering application

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Differences in geochemistry and hydrocarbon generation of sourcerock samples dominated by telalginite and lamalginite: A case study on the Permian saline lacustrine source rocks in the Jimusaer Sag, NW China

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Petroleum Science 2023年第1期20卷 141-160页

作者： Shi-Ju Liu gang Gao Wen-Zhe gang bao-Li Xiang Ming Wang College of Geosciences China University of PetroleumNo.18 Fuxue RoadBeijing102249China State Key Laboratory of Petroleum Resource and Prospecting China University of PetroleumNo.18 Fuxue RoadBeijing102249China Experimental Testing Institute PetroChina Xinjiang Oilfield CompanyKaramayXinjiang834000China

The Middle Permian Lucaogou Formation in Northwestern China mainly contains typical saline lacustrine oil *** study the differences in geochemistry and hydrocarbon generation of source-rock samples in Lucaogou Formation in Jimusaer Sag,57 core samples from two boreholes were analyzed herein by performing total organic carbon(TOC)analysis,RockeEval pyrolysis,and gas chromatographicemass spectrometry experiments on saturated *** kinetics of oil generation were studied using two samples comprising typical maceral *** results showed that the hydrocarbons produced by telalginite are relatively rich in pristane(Pr),phytane(Ph),b-carotane,high-carbon normal alkanes,and C29 regular *** produced by lamalginite contain a significantly higher content of C20 tricyclic terpanes(TT),C21TT,C24 tetracyclic terpanes(TeT),C29 norhopane,and C28 regular *** on the pyrolysis and biomarker compound parameters,telalginite has a higher conversion rate for hydrocarbons than lamalginite in the low-mature to mature stage,which is consistent with their kinetic *** source rock displays a much narrower distribution of activation energies than telalginite source *** narrower activation energy distribution effectively narrows the main stage of hydrocarbon *** addition,the activation energy distribution of lamalginite concentrated in the high-value interval,indicating the characteristics of the relatively lagging hydrocarbon generation of lamalginite.

关键词： Maceral component biomarker compounds Oil generation kinetics Activation energy Lucaogou formation

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