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Methanogenic community structure in simultaneous methanogenesis and denitrification granular sludge

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Frontiers of Environmental Science & Engineering 2018年第4期12卷 99-107页

作者： Yujiao Sun juanjuan Zhao Lili Chen Yueqiao Liu Jiane Zuo College of Water Science Beijing Normal University Beijing 100875 China School of Environment Tsinghua University Beijing 100084 China Envbonmental Engineering Department North China Institute of Science and Tectmology Beijing 101601 China

A laboratory scale up-flow anaerobic sludge bed （UASB） bioreactor ted with synthetic wastewater was operated with simultaneous methanogenesis and denitrification （SMD） granules for 235 days with a gradient decrease of C/N. Molecular cloning, qRT-PCR and T-RFLP were applied to study tile methanogenic community structures in SMD granules and their changes in response to changing influent C/N. The results indicate that when C/N was 20：1, the methane production rate was tastest, and Methanosaetaceae and Methanobacteriaceae were the primary methanogens within tile Archaea. The richness and evenness of methanogenic bacteria was best with the highest T-RFLP diversity index of 1.627 in the six granular sludge samples. When C/N was reduced from 20：1 to 5：1, tbe methanogenic activity of SMD granules decreased gradually, and the relative quantities of methanogens decreased from 36.5% to 10.9%. The abundance of Methanosaetaceae in Archaea increased from 64.5% to 84.2%, while that of Methanobacteriaceae decreased from 18.6% to 11.8%, and the richness and evenness of methanogens decreased along with the T-RFLP diversity index to 1.155, suggesting that the community structure reflected the succession to an unstable condition represented by high nitrate concentrations.

关键词： Simultaneous methanogenesis and denitrifi-cation (SMD) Methanogens Community structure Diversity index Granular sludge

A Stackelberg strategy for continuous-time mixed H2/H∞ control problem with time delay

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Control Theory and Technology 2018年第3期16卷 191-202页

作者： Xiaoqian LI Wei WANG juanjuan XU Huanshui ZHANG School of Control Science and Engineering Shandong University Jinan Shandong 250061 China

This paper is concerned with the mixed H2/H∞ control with linear continuous time system and time delay. To deal with this, we presents a Stackelberg strategy by treating the control input and the disturbance as leader and follower, respectively. The leader＇s control strategy minimizes the cost function which is in H2 norm and the follower＇s control strategy maximizes the cost function which is in H∞ norm. The main technique of this paper is deal with the noncausal relationship of the variables caused by time delay in the control input by introducing two costates to capture the future information and one state to capture the past information. Through theory analyzing, the Stackelberg strategy exists uniquely. Moreover, with the assistance of the extended state space expression, the explicit expression of the strategy is obtained.

关键词： Mixed H2/H∞ control continuous-time system Stackelberg strategy time delay

Impacts of Water-Sediment Regulation Scheme on Chromophoric Dissolved Organic Matter in the Lower Yellow River

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Journal of Ocean University of China 2024年第2期23卷 455-466页

作者： LIU Xiao JIANG Xueyan LIU Qian SUI juanjuan ZOU Li Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of ChinaQingdao 266100China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China School of Earth Sciences University of BristolBristolBS81RJUK North China Sea Environmental Monitoring Center State Oceanic AdministrationQingdao 266033China Key Laboratory of Ecological Prewarning Protection and Restoration of Bohai SeaMinistry of Natural ResourcesQingdao 266033China Key Laboratory of Marine Environment and Ecology of Ministry of Education Ocean University of ChinaQingdao 266100China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

As a river with more than 3000 reservoirs in its watershed,the Yellow River has been affected by dams not only on the sediment load,but also on the water ***-sediment regulation scheme(WSRS),which has been carried out annually in the Yellow River since 2002,is a typical human activity affecting river water *** dissolved organic matter(CDOM)in river is susceptible to changes in ecological and environmental conditions as well as human ***,we report variations in dissolved organic carbon concentrations,compositions and sources of CDOM in time series samples in the lower Yellow River during *** addition,a parallel factor fluorescence analysis(PARAFAC)method is applied to identify different fluorescent components in water samples during WRSR,showing four major components including tryptophan-like component(C1),microbial humic-like component(C2),terrestrial humic-like component(C3)and tyrosine-like component(C4).In general,C1 increased after water regulation,while C2 and C3 increased after sediment regulation,indicating that the water and sediment released by the dam have different effects on CDOM *** the impacts of the dam,source of CDOM in the lower Yellow River is mainly autochthonous related to microbial activities,and is regulated by the terrestrial input during WSRS *** resuspension inhibits microbial activities and reduces the production of autochthonous ***,human activities especially WSRS,as exemplified here,significantly alter the quality and quantity of CDOM in the lower Yellow River,affecting CDOM dynamics and biogeochemical processes in the estuarine environment.

关键词： chromophoric dissolved organic matter(CDOM) water-sediment regulation scheme(WSRS) Yellow River optical properties

An automated pulmonary parenchyma segmentation method based on an improved region growing algorithm in PET-CT imaging

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Frontiers of Computer Science 2016年第1期10卷 189-200页

作者： juanjuan ZHAO Guohua JI Xiaohong HAN Yan QIANG Xiaolei LIAO College of Computer Science and Technology Taiyuan University of Technology Taiyuan 030024 China Key Laboratory of Advanced Transducers and Intelligent Control Systems Taiyuan University of Technology Taiyuan 030024 China

To address the incomplete problem in pulmonary parenchyma segmentation based on the traditional methods, a novel automated segmentation method based on an eight- neighbor region growing algorithm with left-right scanning and four-corner rotating and scanning is proposed in this pa- per. The proposed method consists of four main stages： image binarization, rough segmentation of lung, image denoising and lung contour refining. First, the binarization of images is done and the regions of interest are extracted. After that, the rough segmentation of lung is performed through a general region growing method. Then the improved eight-neighbor region growing is used to remove noise for the upper, mid- dle, and bottom region of lung. Finally, corrosion and ex- pansion operations are utilized to smooth the lung boundary. The proposed method was validated on chest positron emis- sion tomography-computed tomography （PET-CT） data of 30 cases from a hospital in Shanxi, China. Experimental results show that our method can achieve an average volume overlap ratio of 96.21 ± 0.39% with the manual segmentation results. Compared with the existing methods, the proposed algorithm segments the lung in PET-CT images more efficiently and ac- curately.

关键词： pulmonary parenchyma segmentation bot-tom region of lung image binarization iterative threshold seeded region growing four-corner rotating and scanning,denoising contour refining PET-CT

Humoral immunity, the underestimated player in hepatitis B

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Cellular & Molecular Immunology 2018年第6期15卷 645-648页

作者： Shuye Zhang juanjuan Zhao Zheng Zhang Shanghai Public Health Clinical Center and Institute of Biomedical Sciences Fudan UniversityShanghai 201508China Research Center for Clinical&Translational Medicine Beijing 302 HospitalBeijing 100039China

Over decades,the immunological research of hepatitis B virus(HBV)infection has focused on HBVspecific T *** chimpanzees acutely infected with HBV,the deletion of CD4+or CD8+T cells causes chronic HBV *** humans,the HBV-specific T-cell response is temporally correlated with serum HBV clearance during an acute HBV infection,whereas HBVspecific T cells are both quantitatively and qualitatively defective in chronic HBV patients.

关键词： immunity acute infection

A Spectrum Access Method based on Capacity Utility Maximization for Cognitive Mesh Networks

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A Spectrum Access Method based on Capacity Utility Maximizat...

Integrating lipidomics and gut microbiota to study the anti-hyperlipidemia effect of Sargentodoxae Caulis extract

第25届中国控制与决策会议

作者： ZHAO juanjuan ZHAO Peikun Department of Basic Science Baoding Vocational and Technical College

ISBN: (纸本)9781467355339

This paper proposes a spectrum access method based on the capacity utility maximization in wireless cognitive mesh networks. By taking into account the inactivity probability of the primary users, the spectrum sensing time, the probability of false alarm and the channel usage of the surrounding secondary users, a capacity utility function is formed. Through maximizing the capacity utility function, the optimal channel allocation method is proposed. In addition, the channel switching of secondary users is novel designed by lowering the transmitting power in the duration of finding new optimal channel. The simulation results show that, the proposed method obtains a good performance with the system throughput and the average end-to-end delay.

关键词： cognitive mesh networks spectrum access capacity utility channel switching

来源： cnki会议评论

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Traditional Medicine Research 2025年第1期10卷 1-11页

作者： Xiao-Xiao Zhang Li Jia Xiu-Jun Zhan Charity Ngina Qing-Rui Zhang Xiao-ge Li Qi-Bao Jiang Shi Bai Miao-Miao Jiang National Key Laboratory of Chinese Medicine Modernization Tianjin University of Traditional Chinese MedicineTianjin 301617China Haihe Laboratory of Modern Chinese Medicine Tianjin 301617China School of Medicine Taizhou UniversityTaizhou 318000China.

Background:Sargentodoxae Caulis(SC)is the vine stem of Sargentodoxa Cuneata(Oliv.)Rehd.&*** in ***,and it in traditional Chinese medicine has been known for promoting blood circulation and removing blood stasis as recorded in the ancient book“Illustrated Classics of Materia Medica”.It has been used effectively to treat blood stasis too in modern clinical ***,the anti-hyperlipidemia effect of SC is not fully *** paper aims at exploring the use of SC stems to improve the balance of blood lipids in the body,and its new role in treating ***:The effects of SC extract on hyperlipidemia were explored by combining lipidomics and gut ***,we explored the potential mechanism of SC in treating hyperlipidemia by pathway ***:The results showed that the stem extract of SC could restore the physiological and biochemical indices of hyperlipidemia in mice,as well as repair the morphological and structural damage to *** to the Model group,the SC extract significantly reduced the liver index,epididymal fat index,and Lee’s *** also significantly decreased serum levels of total cholesterol,triglycerides,low-density lipoprotein cholesterol,peroxisome proliferator-activated receptor gamma(PPAR-γ),D-lactate,and free fatty acids,while significantly increasing the relative content of peroxisome proliferator-activated receptor alpha(PPAR-α).These changes were statistically ***-targeted lipidomics,based on LC-MS,were utilized to investigate the lipid metabolism characteristics in serum,liver,and epididymal fat of the *** was observed that,compared to the blank group,the Model group exhibited significant changes primarily in glycerol lipids and *** treatment group also displayed alterations in these lipids.A total of 38,81,and 27 differential lipids were identified in serum,liver,and epididymal fat samples,*** these,14 common differenti

关键词： hyperlipidemia Sargentodoxae Caulis lipidomics intestinal flora

A Fiber Optic Sensor for 2,4-dichlorophenol Analysis based on Optical Composite Oxygen-sensitive Film

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Journal of Wuhan University of Technology(Materials Science) 2020年第4期35卷 743-749页

作者： TONG Yilin ZENG Zhihong YU Kan BAO Jiaqi YIN juanjuan Information Science and Technology Department Wenhua CollegeWuhan 430074China

A novel fiber optic sensor based on optical composite oxygen-sensitive film was developed for determination of 2,4-dichlorophenol(DCP).The optical composite oxygen-sensitive film consists of tris(2,2’-bipyridyl)dichloro ruthenium(II)hexahydrate(Ru(bpy)3Cl2)as the fluorescence indicator and iron(III)tetrasulfophthalocyanine(Fe(III)PcTs)as bionic enzyme.A lock-in amplifier was used for detecting the lifetime of the composite oxygen-sensitive film by measuring the phase delay of the sensor *** different variables affecting the sensor performance were evaluated and *** the optimal conditions(i e,pH 6.0,25℃,Fe(III)PcTs concentration of 5.0×10^-5 mol/L),the linear detection range,detection limit and response time of the fiber optic sensor are 3.0×10^-7-9.0×10^-5 mol/L,4.8×10^-8 mol/L(S/N=3),and 220 s,*** sensor displays high selectivity,good repeatability and stability,which have good potentials in analyzing DCP concentration in practical water samples.

关键词： 2 4-dichlorophenol optical composite oxygen-sensitive film fiber optic sensor phase delay

Perturbation and robust controllability of singular distributed parameter control systems in Hilbert space

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Journal of Systems Engineering and Electronics 2011年第4期22卷 647-653页

作者： Zhaoqiang ge Department of Applied Mathematics Xi'an Jiaotong University Xi'an 710049 R R. China

Perturbation and robust controllability of the singular distributed parameter control system are discussed via functional analysis and the theory of ge-semigroup in Hilbert space. The perturbation principle of ge-semigroup and the sufficient condition concerning the robust controllability of the singular distributed parameter control system are obtained, in which the controllability for singular distributed parameter control system is not destroyed, if we perturb the equation by small bounded linear operator.

关键词： perturbation robust controllability singular distributedparameter system functional analysis Hilbert space.