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Nitrification and denitrification in biological activated carbon filter for treating high ammonia source

LIU Jianguang, ZHANG Xiaojian, WANG Zhansheng

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1,   Pages 94-98 doi: 10.1007/s11783-008-0020-1

Abstract: could not meet the supply demand, the advanced treatment of a high concentration of 4-N micro-polluted sourcewater by biological activated carbon filter (BACF) was tested.The filter was operated in the downflow manner and the results showed that the removing rate of NH4-Nand the filter layer was divided into aerobic and anoxic zones.Due to the limited carbon source, the denitrification could not be carried out properly, which led to
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Current Source Active Power Filter Control UsingNeural Network Technologies

Wang Ping,Zhang Ke, Xu Huijun

Strategic Study of CAE 2007, Volume 9, Issue 1,   Pages 40-43

Abstract:

In this paper,the application of neural network to power converter control is discussed.A new hysteresis comparator constructed by using neural network is introduced.Hysteresis band control is an effective and simple control method.It can easily run without many system parameters.But the switch frequency of system is not fixed.So it not only makes the system unstable but also may lessen the life span of the switches. The control method that combines the neural network technology with the hysteresis band technology has a high performance in response of current.Through training the neural network can learn the control rules by itself and can replace the real hysteresis comparator in power converter control.The computer simulation results are given in this paper and they can demonstrate the effectiveness of the proposed method.The neural network is realized by using DSP.

Keywords： source filter     neural network     hysteresis comparator    

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A simple digital control algorithm for three phase shunt active filter: simulation and experimentation

Subbaraman SRINATH, Chandan KUMAR, M. P. SELVAN

Frontiers in Energy 2014, Volume 8, Issue 1,   Pages 119-128 doi: 10.1007/s11708-013-0288-0

Abstract: using digital signal processor (DSP) has been proposed and realized for a three phase shunt active filterresults correlate with the simulation results in reducing the total harmonic distortion (THD) of the source

Keywords： shunt active filter (SAF)     power quality     voltage source inverter (VSI)     digital signal processor (DSP)    

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Research on Multi-level Software Rejuvenationof Computing System

You Jing,Xu Jian,Li Qianmu, Liu Fengyu

Strategic Study of CAE 2007, Volume 9, Issue 2,   Pages 36-37

Abstract:

Recently,the phenomenon of software aging,one in which error conditions actually accrue with time and/or load,has been observed. To counteract software aging, which can cause outages resulting in high costs,a proactive restart technique called software rejuvenation is proposed and the rejuvenation cost is analyzed.In order to reduce the rejuvenation cost and improve software availability and reliability further, rejuvenation granularity should be finer than before. Therefore a fine-grained proactive technique——multilevel software rejuvenation is put forward. Firstly, the degradation law of system performance can be determined by analyzing the occupation and wastage of system resources. Based on the law and the software architecture,the two software rejuvenation policies, i.e. time-based multilevel software rejuvenation policy and detection-based multilevel software rejuvenation policy, can be drafted, and the rejuvenation granularity can be determined. Their formal description of policies is given by finite-state automaton. Finally, the entire process is illustrated with a web service case. This paper provides a case to illustrate the process, and the simulation results of the case show that the multilevel software rejuvenation policy can reduce the MTTR and rejuvenation cost further, comparing with the only system-level software rejuvenation. As a consequence,the system availability and reliability are enhanced.

Keywords： source filter     neural network     hysteresis comparator    

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Development of source profiles and their application in source apportionment of PM

Ningning Zhang, Mazhan Zhuang, Jie Tian, Pengshan Tian, Jieru Zhang, Qiyuan Wang, Yaqing Zhou, Rujin Huang, Chongshu Zhu, Xuemin Zhang, Junji Cao

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 5, doi: 10.1007/s11783-016-0879-1

Abstract: Local source profiles of major PM sources were developed.Source apportionment was conducted using CMB model.Local source samples were obtained from coal burning power plants, industries, motor vehicles, biomassburning, fugitive dust, and sea salt for the source apportionment studies.and the source profiles.

Keywords： PM2.5     Source profile     Source apportionment     CMB     Xiamen    

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Implicit Heaviside filter with high continuity based on suitably graded THB splines

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 14-14 doi: 10.1007/s11465-021-0670-2

Abstract: problem of low continuity resulting from the discreteness of both design variables and explicit Heaviside filterIn this paper, an implicit Heaviside filter with high continuity is introduced to generate black andintrinsic local support and high continuity of THB basis, an implicit adaptively adjusted Heaviside filterThreefold advantages are attained in the proposed filter: a) The connection between analysis mesh andSeveral numerical examples are used to verify the effectiveness of the proposed implicit Heaviside filter

Keywords： optimization     truncated hierarchical B-spline     isogeometric analysis     black and white designs     Heaviside filter    

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The source and transport of bioaerosols in the air: A review

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 3, doi: 10.1007/s11783-020-1336-8

Abstract:

• Emission of microbe from local environments is a main source of bioaerosols

Keywords： Bioaerosols     Diffusion     Source identification     Biogeography    

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Anovel approach of noise statistics estimate using H∞ filter in target tracking

Xie WANG,Mei-qin LIU,Zhen FAN,Sen-lin ZHANG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 5,   Pages 449-457 doi: 10.1631/FITEE.1500262

Abstract: First, we apply the H∞ filter to obtain the system state estimates without the common assumptions aboutThen by applying state estimates obtained from the H∞ filter, better estimates of the noise mean and

Keywords： Noise estimate     H∞     filter     Target tracking    

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Isolation and application of an ibuprofen-degrading bacterium to a biological aerated filter for the

Bingjie Xu, Gang Xue, Xing Yang

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 5, doi: 10.1007/s11783-018-1080-5

Abstract: listitem>

• Strain BL1 was applied to a laboratory-scale biological aerated filterlistitem>

• Strain BL1 was stable in both static tests and in the biological aerated filter

Keywords： Ibuprofen     Biological aerated filter     Degrading bacterium     Serratia marcescens    

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δN-stable isotope analysis of NH: An overview on analytical measurements, source sampling and its source

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1414-6

Abstract:

• Challenges in sampling of NH3 sources for d15N analysis are highlighted.

Keywords： Aerosol ammonium     Atmospheric gaseous ammonia     Isotope fingerprinting     Isotope-based source apportionment    

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Fault tolerant control strategy for modular PWM current source inverter

Frontiers in Energy 2023, Volume 17, Issue 2,   Pages 228-238 doi: 10.1007/s11708-022-0852-6

Abstract: control method for an input-series output-parallel modular grid-tied pulse-width modulation (PWM) current source

Keywords： current source converter (CSC)     fault-tolerant control     space vector modulation     active damping     resonance    

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Rapid transaction to load variations of active filter supplied by PV system

M. BENADJA,S. SAAD,A. BELHAMRA

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 335-344 doi: 10.1007/s11708-014-0325-7

Abstract: a photovoltaic (PV) system connected to the main supply through a Boost converter and shunt active filterTo demonstrate the effectiveness of the shunt active filter to load changes, the method of instantaneous

Keywords： solar panels     maximum power point tracking (MPPT)     DC/DC converter (Boost)     shunt active filter     instantaneous    

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Effect of biological activated carbon filter depth and backwashing process on transformation of biofilm

Wanqi Qi, Weiying Li, Junpeng Zhang, Xuan Wu, Jie Zhang, Wei Zhang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 1, doi: 10.1007/s11783-019-1100-0

Abstract: listitem>

Microbial diversity decreased gradually with the increase of BAC filteritemcontent>

α-proteobacteria increased about 10% in all carbon filter

Keywords： Biological activated carbon     Biofilm     Community structure     Carbon filter depth     High-throughput sequencing    

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Ceramic water filter for point-of-use water treatment in developing countries: Principles, challenges

Haiyan Yang, Shangping Xu, Derek E. Chitwood, Yin Wang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 5, doi: 10.1007/s11783-020-1254-9

Abstract: Drinking water source contamination poses a great threat to human health in developing countries.1) CWF manufacturing process (raw material selection, firing process, silver impregnation), and (2) sourceefforts to address two major challenges of conventional CWFs, including (1) simultaneous increase of filter

Keywords： Point-of-use water treatment     Ceramic water filter     Bacterial removal     Surface modification     Water quality    

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Influence of influent on anaerobic ammonium oxidation in an Expanded Granular Sludge Bed-Biological Aerated Filter

Daijun ZHANG, Cui BAI, Ting TANG, Qing YANG

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 291-297 doi: 10.1007/s11783-010-0270-6

Abstract: methanogenesis have been successfully coupled in an Expanded Granular Sludge Bed-Biological Aerated Filter

Keywords： Expanded Granular Sludge Bed-Biological Aerated Filter (EGSB-BAF) integrated system     the influence of    

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Title Author Date Type Operation

Nitrification and denitrification in biological activated carbon filter for treating high ammonia source

LIU Jianguang, ZHANG Xiaojian, WANG Zhansheng

Journal Article

Current Source Active Power Filter Control UsingNeural Network Technologies

Wang Ping,Zhang Ke, Xu Huijun

Journal Article

A simple digital control algorithm for three phase shunt active filter: simulation and experimentation

Subbaraman SRINATH, Chandan KUMAR, M. P. SELVAN

Journal Article

Research on Multi-level Software Rejuvenationof Computing System

You Jing,Xu Jian,Li Qianmu, Liu Fengyu

Journal Article

Development of source profiles and their application in source apportionment of PM

Ningning Zhang, Mazhan Zhuang, Jie Tian, Pengshan Tian, Jieru Zhang, Qiyuan Wang, Yaqing Zhou, Rujin Huang, Chongshu Zhu, Xuemin Zhang, Junji Cao

Journal Article

Implicit Heaviside filter with high continuity based on suitably graded THB splines

Journal Article

The source and transport of bioaerosols in the air: A review

Journal Article

Anovel approach of noise statistics estimate using H∞ filter in target tracking

Xie WANG,Mei-qin LIU,Zhen FAN,Sen-lin ZHANG

Journal Article

Isolation and application of an ibuprofen-degrading bacterium to a biological aerated filter for the

Bingjie Xu, Gang Xue, Xing Yang

Journal Article

δN-stable isotope analysis of NH: An overview on analytical measurements, source sampling and its source

Journal Article

Fault tolerant control strategy for modular PWM current source inverter

Journal Article

Rapid transaction to load variations of active filter supplied by PV system

M. BENADJA,S. SAAD,A. BELHAMRA

Journal Article

Effect of biological activated carbon filter depth and backwashing process on transformation of biofilm

Wanqi Qi, Weiying Li, Junpeng Zhang, Xuan Wu, Jie Zhang, Wei Zhang

Journal Article

Ceramic water filter for point-of-use water treatment in developing countries: Principles, challenges

Haiyan Yang, Shangping Xu, Derek E. Chitwood, Yin Wang

Journal Article

Influence of influent on anaerobic ammonium oxidation in an Expanded Granular Sludge Bed-Biological Aerated Filter

Daijun ZHANG, Cui BAI, Ting TANG, Qing YANG

Journal Article