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A new strategy for obtaining highly concentrated phosphorus recovery solution in biofilm phosphorus recovery process

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Journal of Environmental Sciences 2022年第2期34卷 366-375页

作者： Wanjing Yang Jie Shan Yang Pan Zhen Bi Yong Huang hao Zhang Min Ni School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China National&Local Joint Engineering Laboratory for Municipal Sewage Resource Utilization Technology Suzhou University of Science and TechnologySuzhou 215009China

Recovery of phosphorus(P)from wastewater is of great significance for alleviating the shortage of P *** present,the P recovery process is faced with the problem of excessive organic carbon consumption when obtaining a P-concentrated recovery *** study proposed a new strategy to obtain a more highly concentrated P recovery solution with minimal carbon consumption by strengthening the P storage capacity of the biofilm.A biofilm sequencing batch reactor(BSBR)process was modified to treat synthetic *** effect of the dissolved oxygen(DO)concentration on the P storage capacity of the biofilm was investigated at DO concentrations of DO 3.5 mg/L(P_(L))and DO 6.5 mg/L(P_(H)).The results showed a maximum P storage of 101.2 and 149.6 mg-P/g-mixed liquid suspended solids under the two *** the P storage capacity of the biofilm resulted in a net increase in the P recovery rate,which was as high as 66.96%in a harvesting cycle,and total soluble P>220 mg/L in the P recovery solution was successfully ***,the carbon cost of P recovery in the BSBR was reduced to 41.57 g-chemical oxygen demand/gP,and the carbon utilization efficiency was *** highlight the new strategy,the P recovery performance of the BSBR was given and the relationship between P content and anaerobic P release was *** addition,the changes in the microbial communities under P_(L) and P_(H) conditions were analyzed.

关键词： Biofilm sequencing batch reactor Phosphorus storage capacity Phosphorus release Phosphorus recovery

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Transferring priors from virtual data for crowd counting in real world

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Frontiers of Computer Science 2022年第3期16卷 1-8页

作者： Xiaoheng JIANG hao LIU Li ZHANG Geyang LI Mingliang XU Pei LV Bing ZHOU School of Information Engineering Zhengzhou UniversityZhengzhou 450001China School of Information Engineering Henan University of Science and TechnologyLuoyang 471000China

In recent years,crowd counting has increasingly drawn attention due to its widespread applications in the field of computer *** of the existing methods rely on datasets with scarce labeled images to train *** are prone to suffer from the over-fitting ***,these existing datasets usually just give manually labeled annotations related to the head center *** kind of annotation provides limited *** this paper,we propose to exploit virtual synthetic crowd scenes to improve the performance of the counting network in the real *** we can obtain people masks easily in a synthetic dataset,we first learn to distinguish people from the background via a segmentation network using the synthetic *** we transfer the learned segmentation priors from synthetic data to real-world ***,we train a density estimation network on real-world data by utilizing the obtained people *** experiments on two crowd counting datasets demonstrate the effectiveness of the proposed method.

关键词： crowd counting synthetic data virtual-real combination people segmentation density estimation

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A reduced combustion mechanism of ammonia/diesel optimized with multi-objective genetic algorithm

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Defence Technology（防务技术） 2024年第4期34卷 187-200页

作者： Wanchen Sun Shaodian Lin hao Zhang Liang Guo Wenpeng Zeng Genan Zhu Mengqi Jiang State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130025China

For the deep understanding on combustion of ammonia/diesel,this study develops a reduced mechanism of ammonia/diesel with 227 species and 937 *** sub-mechanism on ammonia/interactions of N-based and C-based species(N—C)/NOx is optimized using the Non-dominated Sorting Genetic Algorithm II(NSGA-II)with 200 *** optimized mechanism(named as 937b)is validated against combustion characteristics of ammonia/methane(which is used to examine the accuracy of N—C interactions)and ammonia/diesel *** ignition delay times(IDTs),the laminar flame speeds and most of key intermediate species during the combustion of ammonia/methane blends can be accurately simulated by 937b under a wide range of *** for ammonia/diesel blends with various diesel energy fractions,reasonable predictions on the IDTs under pressures from 1.0 MPa to5.0 MPa as well as the laminar flame speeds are also achieved by *** particular,with regard to the IDT simulations of ammonia/diesel blends,937b makes progress in both aspects of overall accuracy and computational efficiency,compared to a detailed ammonia/diesel *** kinetic analysis reveals that the reaction pathway of ammonia during the combustion of ammonia/diesel blend mainly differs in the tendencies of oxygen additions to NH_2 and NH with different equivalence ratios.

关键词： Ammonia Diesel Combustion Kinetic mechanism Multi-objective optimization

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Evaluating Parameterizations for Turbulent Fluxes over the Landfast Sea-Ice Surface in Prydz Bay, Antarctica

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Advances in Atmospheric Sciences 2023年第10期40卷 1816-1832页

作者： Fangyuan CHENG Qinghua YANG Changwei LIU Bo HAN Shijie PENG Guanghua hao School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519080China National Marine Environmental Forecasting Center Beijing 100081China

It is crucial to appropriately determine turbulent fluxes in numerical *** data collected in East Antarctica from 8 April to 26 November 2016,this study evaluates parameterization schemes for turbulent fluxes over the landfast seaice surface in five numerical *** Community Noah Land Surface Model with Multi-Parameterizations Options(Noah_mp)best replicates the turbulent momentum flux,while the Beijing Climate System Model(BCC_CSM)produces the optimum sensible and latent heat *** particular,two critical issues of parameterization schemes,stability functions and roughness lengths,are *** tests indicate that roughness lengths play a decisive role in model *** on the observed turbulent fluxes,roughness lengths over the landfast sea-ice surface are *** results,which can provide a basis for setting up model parameters,reveal that the dynamic roughness length(z0m)increases with the increase of frictional velocity(u*)when u*≤0.4 m s^(−1) and fluctuates around 10^(−3 )m when u*>0.4 m s^(−1);thermal roughness length(z0t)is linearly related to the temperature gradient between air and sea-ice surface(ΔT)with a relation of lg(z0t)=−0.29ΔT−3.86;and the mean water vapor roughness length(z0q)in the specific humidity gradient(Δq)range ofΔq≤−0.6 g kg^(−1) is 10^(−6) m,3.5 times smaller than that in the range ofΔq˃−0.6 g kg^(−1).

关键词： turbulent fluxes Antarctica landfast sea-ice surface parameterization evaluating numerical models

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Enhancing lithium-ion and electric conductive Li_(2)FeSiO_(4)cathode through in situ boron-doping and carbon-coating strategy

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Rare Metals 2022年第12期41卷 4055-4064页

作者： hao-Xiang Li Jia-Hui Zhu Xiao-Bing Huang Tao Zhou Yu-Rong Ren Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Water Treatment Functional Materials Hunan Provincial Key Laboratory for Control Technology of Distributed Electric Propulsion AircraftCollege of Chemistry and Materials EngineeringHunan University of Arts and ScienceChangde 415000China Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery Changzhou Key Laboratory of Intelligent Manufacturing and Advanced Technology for Power BatterySchool of Materials Science and EngineeringChangzhou UniversityChangzhou 213164China

The extremely low electrical conductivity and ion-diffusion coefficient of Li_(2)FeSiO_(4)limits its application as a cathode material in lithium-ion ***,in situ boron-doped Li_(2)FeSi_(1)-xB_(x)O_(4-δ)/C(x=0,0.01,0.03,0.05 and 0.07)at the Si site was prepared via the solid-state reaction method using pitch as the c arbon source.B doping in the lattice structure and a c arbon coating on the surface of the composites could effectively enhance the Li^(+)/electron ***,the reduced particle size of the active material with the relatively high specific area via borondoped modification could improve the wettability between the electrolyte and *** the synergistic effect of appropriate boron doping and carbon coating,it exhibits a good rate performance,specific capacity,and cycling *** a result,the as-prepared Li_(2)FeSi_(0.95)B_(0.05)O_(4-δ)/C cathode showed a high discharge capacity of 160.7mAh·g^(-1)at 0.2C,and the capacity retention rate was 96%after 100 cycles at *** work presents an effective path for designing advanced cathode materials for lithium-ion batteries.

关键词： Li_(2)FeSiO_(4) Carbon coating Boron doping Synergistic effect Lithium-ion battery

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Seasonal changes in gut microbiota of sea cucumber over natural aestivation cycle

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Journal of Oceanology and Limnology 2024年第3期42卷 849-864页

作者： Ye Zhao Han WANG haona WANG Lijie ZHANG hao SUN Yanying ZHANG Ocean School Yantai UniversityYantai 264005China

Sea cucumber Apostichopus japonicus is an ideal model organism for marine invertebrate aestivation;it annually enters a“sleeping state”for nearly 3 months when ambient water temperature range is 25–30℃.The natural fasting is accompanied by remodeling the intestinal biota and function,which is a part of host biology and could affect the gut *** investigatesd the impact of annual aestivation on gut microbiota using high-throughput sequencing of 16S rRNA *** reveal a notable alteration in the composition of gut bacteria during aestivation during which various indigenous families and genera that exhibit a preference for dietary glycans(e.g.,family Rhodobacteraceae and Flavobacteriaceae)decreased,while the taxa capable of utilizing substrates derived from the host(e.g.,genus Akkermansia and Prevotella)increased,and so did certain opportunistic pathogenic ***,the investigation delved into the gut morphology and immunity response of *** and reveal that the intestine of *** undergoes substantial atrophy and degeneration during ***,there was an observed augmentation in the levels of acid and neutral mucin within mucous cells,as well as an enhanced immune defense response(as evidenced by increased gene expression of AjTLR3,LITAF,Ajp105,and LYZ).These results imply that the composition of sea cucumber gut microbiota differed between aestivation and active periods,which potentially affects the intestinal functions of the host and the symbiotic relationship between host and its microbiota over the activeaestivation cycle.

关键词： Apostichopus japonicus aestivation gut microbiota diet Illumina sequencing

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Hertz-rate metropolitan quantum teleportation

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Light(Science & Applications) 2023年第6期12卷 1001-1009页

作者： Si Shen Chenzhi Yuan Zichang Zhang hao Yu Ruiming Zhang Chuanrong Yang hao Li Zhen Wang You Wang Guangwei Deng Haizhi Song Lixing You Yunru Fan Guangcan Guo Qiang Zhou Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 200050China Southwest Institute of Technical Physics Chengdu 610041China CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China

Quantum teleportation can transfer an unknown quantum state between distant quantum nodes,which holds great promise in enabling large-scale quantum *** advance the full potential of quantum teleportation,quantum states must be faithfully transferred at a high rate over long *** recent impressive advances,a high-rate quantum teleportation system across metropolitan fiber networks is extremely ***,we demonstrate a quantum teleportation system which transfers quantum states carried by independent photons at a rate of 7.1±0.4 Hz over 64-km-long fiber *** average single-photon fidelity of≥90.6±2.6%is achieved,which exceeds the maximum fidelity of 2/3 in classical *** result marks an important milestone towards quantum networks and opens the door to exploring quantum entanglement based informatic applications for the future quantum internet.

关键词： quantum holds desired

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Investigation of geothermal structure of the Sulawesi,using gravity and magnetic method

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Science China Earth Sciences 2021年第2期64卷 278-293页

作者： Jian ZHANG Tianyao hao Miao DONG Ya XU Beiyu WANG Yifei AI Gui FANG University of Chinese Academy of Sciences Beijing 100049China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

The Sulawesi Sea and Sulawesi Island are located in the western Pacific area where volcanic activity,plate subduction,and seismic activity are very *** Sulawesi basin formed during the Middle Eocene-Late Eocene and nearly half of the Eocene oceanic crust has subducted below the North Sulawesi *** Sulawesi Island was spliced and finalized in the Early Pliocene-Pleistocene during volcanic activity and is recently very *** area is an optimal location to study volcanic geothermal conditions and subduction initiation mechanisms in the southern part of the western Pacific plate margin,which are important in geothermal and geodynamic *** this study,we combined 133 heat flow data with gravity and magnetic data to calculate the Moho structure and Curie point depth of the Sulawesi Sea and periphery of the Sulawesi Island,and analyze the distribution characteristics of the geothermal gradient and thermal *** results show that the average depths of the Moho and Curie surfaces in this area are 18.4 and 14.3 km,respectively,which is consistent with the crustal velocity layer structure in the Sulawesi Basin previously determined by seismic *** average geothermal gradient is 4.96°C(100 m)-*** oceanic area shows a high geothermal gradient and low thermal conductivity,whereas the land area shows a low geothermal gradient and high thermal conductivity,both of which are consistent with statistical results of the geothermal gradient at the measured heat flow *** highest geothermal gradient zone occurs in the transition zone from the Sulawesi Sea to Sulawesi Island,corresponding to the spreading ridge of the southward-moving Sulawesi *** gravity,magnetic,and geothermal studies have shown a high crustal geothermal gradient in the study area,which is conducive to the subduction *** northern part of the Palu-koro fault on the western side of Sulawesi is likely the location where subduction initiation i

关键词： Sulawesi Sea and Sulawesi Island Gravity and geothermal gradient Thermal crust Moho and Curie point depth Subduction retreat and sinistral strike-slip

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Symmetry of Positive Solutions to the Coupled Fractional System with Isolated Singularities

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Acta Mathematica Sinica,English Series 2021年第9期37卷 1437-1452页

作者： Meng Hui LI Jin Chun HE hao Yuan XU Mei Hua YANG School of Mathematics and Statistics Huazhong University of Science and TechnologyWuhan 430074P.R.China

In this paper,we consider the following two-coupled fractional Laplacian system with two or more isolated singularities(-△)^(s)u=μ1u^(2q+1)+βu^(p1-1)v^(p2)(-△)^(s)v=μ2v(2q+1+βu^p1v^p2-1)in R(n)\Λ,u>0,u>0,where s∈(0,1),n>2s and n≥2.μ1,μ2 andβare all positive constants.p1,p2>1 and p1+p2=2q+2∈((2n-2s)/(n-2s),(2n)/(n-2s)].Λ■R^(n)contains finitely many isolated *** the method of moving plane,we obtain the symmetry results for positive solutions to above system.

关键词： Fractional Laplacian system moving plane symmetry singularity

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Glutamicibacter nicotianae AT6:A new strain for the efficient biodegradation of tilmicosin

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Journal of Environmental Sciences 2024年第8期142卷 182-192页

作者： Huijuan Li hao Zhou Liling Fan Long Meng Yanyun Zhao Lanmei Zhao Bo Wang College of Chemical and Biological Engineering Shandong University of Science and TechnologyQingdao 266590China College of Chemistry and Chemical Engineering Heze UniversityHeze 274015China College of Safety and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China

The degradation of tilmicosin(TLM),a semi-synthetic 16-membered macrolide antibiotic,has been receiving increasing ***,there are three tilmicosin degradation methods,and among them microbial degradation is considered the best due to its high efficiency,eco-friendliness,and low ***,we found a new strain,Glutamicibacter nicotianae ***6,capable of degrading high-concentration TLM at 100 mg/L with a 97%removal *** role of tryptone was as well investigated,and the results revealed that the loading of tryptone had a significant influence on TLM *** toxicity assessment indicated that strain AT6 could efficiently convert TLM into less-toxic *** on the identified intermediates,the degradation of TLM by AT6 processing through two distinct pathways was then proposed.

关键词： Tilmicosin Glutamicibacter nicotianae Biodegradation Degradation pathway Pharmaceutical wastewater

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