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New decentralized control technique based on substructure and LQG approaches

Ying LEI, Ying LIN,

《机械工程前沿（英文）》 2009年 第4卷 第4期   页码 386-392 doi: 10.1007/s11465-009-0041-x

摘要： Decentralized control is more suitable for structural control of large-scale structures. In this paper, a new decentralized control technique is proposed based on the linear quadratic Gaussian (LQG) and substructure approaches. A large-scale structure is divided into a set of smaller substructures. Each substructure is controlled by its own local controller with interaction forces at substructural interfaces, which are considered as “unknown external inputs” to the substructure concerned. An algorithm of recursive least squares estimation for the unknown excitation is proposed. A numerical example of the decentralized control of a tall building is studied to illustrate the new proposed algorithm. Simulation results show that the proposed decentralized control provides satisfactory control performance when comparing with the conventional centralized LQG control algorithm and is viable for the future structural control of large-scale structures.

关键词： substructures     decentralized control     linear quadratic Gaussian (LQG)     Kalman filter     unknown input     least-squares estimation    

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Distribution of antibiotic resistance genes and their association with bacteria and viruses in decentralized

《环境科学与工程前沿（英文）》 2022年 第16卷 第3期 doi: 10.1007/s11783-021-1469-4

摘要：

• Distribution of ARGs in decentralized sewage facilities were investigated.

关键词： Decentralized sewage treatment facilities     Antibiotic resistance genes     Virus     Metagenomics     Network analysis    

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Comparison and modeling of two biofilm processes applied to decentralized wastewater treatment

Guanglei QIU, Yonghui SONG, Peng YUAN, Liancheng XIANG, Jianfeng PENG, Ping ZENG,

《环境科学与工程前沿（英文）》 2009年 第3卷 第4期   页码 412-420 doi: 10.1007/s11783-009-0141-1

摘要： In order to control water pollution in the rapidly urbanizing South China area, biological contact oxidation (BCO) process and biological aerated filter (BAF) process were applied in a pilot-scale experiment for decentralized wastewater treatment. An investigation to find the optimal parameters of the two biofilm systems was conducted on hydraulic loading, organic loading, and aeration rate. The results indicated that the water reuse criteria required a maximum hydraulic and organic loading of 30.0 m/(m·d) and 4.0 kg COD/(m·d), respectively, as well as a minimum effluent DO of 4.0 mg/L. The utilization of a new media allowed BAF to perform better than BCO. The kinetic description of the COD removal process for BAF and BCO are Yang ZHANG,Zifu LI,Ibrahim B MAHMOOD. [J]. Front. Environ. Sci. Eng., 2014, 8(6): 825-834.Daijun ZHANG, Cui BAI, Ting TANG, Qing YANG. [J]. Front Envir Sci Eng Chin, 2011, 5(2): 291-297.Deming ZHAO, Jie CHENG, Michael R. HOFFMANN. [J]. Front Envir Sci Eng Chin, 2011, 5(1): 57-64.Bo WANG, Wei WAN, Jianlong WANG, . [J]. Front.Environ.Sci.Eng., 2009, 3(4): 380-386. Junxiong LIN , Lan WANG , . [J]. Front.Environ.Sci.Eng., 2009, 3(3): 320-324.Lu LI, Shuguang XIE, Hui ZHANG, Donghui WEN. [J]. Front Envir Sci Eng Chin, 2009, 3(1): 38-47.

关键词： biological contact oxidation     biological aerated filter     decentralized wastewater treatment     kinetic model    

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Performance of a hybrid anaerobic-contact oxidation biofilm baffled reactor for the treatment of decentralized

Minmin LIU,Ying ZHAO,Beidou XI,Li’an HOU,Xunfeng XIA

《环境科学与工程前沿（英文）》 2014年 第8卷 第4期   页码 598-606 doi: 10.1007/s11783-013-0576-2

摘要： A novel hybrid anaerobic-contact oxidation biofilm baffled reactor (HAOBR) was developed to simultaneously remove nitrogenous and carbonaceous organic pollutants from decentralized molasses wastewater in the study. The study was based on the inoculation of anaerobic granule sludge in anaerobic compartments and the installation of combination filler in aerobic compartments. The performance of reactor system was studied regarding the hydraulic retention time (HRT), microbial characteristics and the gas water ratio (GWR). When the HRT was 24h and the GWR was 20:1, total ammonia and chemical oxygen demand (COD) of the effluent were reduced by 99% and 91.8%, respectively. The reactor performed stably for treating decentralized molasses wastewater. The good performance of the reactor can be attributed to the high resistance of COD and hydraulic shock loads. In addition, the high solid retention time of contact oxidation biofilm contributed to stable performance of the reactor.

关键词： combination filler     contact oxidation biofilm     food wastewater     anaerobic baffled reactor    

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Decentralized wastewater treatment technologies and management in Chinese villages

Xuesong GUO,Zehang LIU,Meixue CHEN,Junxin LIU,Min YANG

《环境科学与工程前沿（英文）》 2014年 第8卷 第6期   页码 929-936 doi: 10.1007/s11783-013-0623-z

摘要： Problems treating sewage in rural areas in China have attracted increasing attention in recent years. However, only 6% of rural areas had spray drainage and wastewater treatment systems by the end of 2010. It is necessary to assess the technologies currently used so that sewage treatment in rural areas can be developed appropriately, to provide reliable and affordable wastewater treatment, in these areas. We evaluated the sewage treatment technologies currently used in rural areas by conducting case studies on 62 facilities that had each been operating for at least one year. Our study was carried out between 2009 and 2011, and the aim was to assess the situation during that period and assess any problems involved in decentralized sewage treatment in villages. We found that decentralized sewage treatment is the most popular wastewater treatment method in villages, and that the most common primary treatment technology used in rural areas is the septic tank. Our investigation highlights the need to establish standards for assessing effluent quality, including a range of target pollutants. Our results also show that effluents should be reused to meet the local environmental requirements in different areas, especially in ecologically sensitive areas.

关键词： decentralized treatment     strategy     sustainable development     village     wastewater treatment situation    

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有向通信拓扑下具有姿态同步跟踪预设性能的多无人机分散式容错协同控制 Regular Papers

Zi-quan YU, Zhi-xiang LIU, You-min ZHANG, Yao-hong QU, Chun-yi SU

《信息与电子工程前沿（英文）》 2019年 第20卷 第5期   页码 685-700 doi: 10.1631/FITEE.1800569

摘要： 针对多无人机在有向通信拓扑中遭遇执行器故障问题，提出一种分散式容错协同控制方案。首先，利用神经网络对无人机模型中的固有非线性项和执行器效率下降故障所引起的未知非线性项进行估计。其次，引入干扰观测器对神经网络估计偏差和执行器偏差故障进行估计。再次，设计可反映神经网络和干扰观测器复合估计能力的预测偏差，并将该预测偏差集成至所设计的容错协同控制方案中，以提升复合估计能力。最后，利用预设性能函数对姿态同步跟踪偏差进行变换，实现同步跟踪偏差预设性能控制。该控制方案的一个关键特征是多无人机本身的非线性项和与执行器故障有关的非线性项可被神经网络、干扰观测器、预测偏差组成的复合估计器较好地估计。另一个关键特征是姿态同步跟踪偏差被严格约束在预设性能界限内。仿真结果表明所设计控制方案有效。

关键词： 容错控制；分散式控制；预设性能；无人机；神经网络；干扰观测器；有向拓扑    

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Mechanistic insight into the biofilm formation and process performance of a passive aeration ditch (PAD) for decentralized

《环境科学与工程前沿（英文）》 2022年 第16卷 第7期 doi: 10.1007/s11783-021-1494-3

摘要：

• A Passive Aeration Ditch was developed to treat decentralized wastewater.

关键词： Decentralized wastewater     Passive aeration ditch     Biofilm formation     C/N ratio     Salinity     Model simulation    

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Evaluation of the technoeconomic feasibility of electrochemical hydrogen peroxide production for decentralized

Yang Li, Yixin Zhang, Guangshen Xia, Juhong Zhan, Gang Yu, Yujue Wang

《环境科学与工程前沿（英文）》 2021年 第15卷 第1期 doi: 10.1007/s11783-020-1293-2

摘要： Abstract • Gas diffusion electrode (GDE) is a suitable setup for practical water treatment. • Electrochemical H2O2 production is an economically competitive technology. • High current efficiency of H2O2 production was obtained with GDE at 5–400 mA/cm2. • GDE maintained high stability for H2O2 production for ~1000 h. • Electro-generation of H2O2 enhances ibuprofen removal in an E-peroxone process. This study evaluated the feasibility of electrochemical hydrogen peroxide (H2O2) production with gas diffusion electrode (GDE) for decentralized water treatment. Carbon black-polytetrafluoroethylene GDEs were prepared and tested in a continuous flow electrochemical cell for H2O2 production from oxygen reduction. Results showed that because of the effective oxygen transfer in GDEs, the electrode maintained high apparent current efficiencies (ACEs,>80%) for H2O2 production over a wide current density range of 5–400 mA/cm2, and H2O2 production rates as high as ~202 mg/h/cm2 could be obtained. Long-term stability test showed that the GDE maintained high ACEs (>85%) and low energy consumption (<10 kWh/kg H2O2) for H2O2 production for 42 d (~1000 h). However, the ACEs then decreased to ~70% in the following 4 days because water flooding of GDE pores considerably impeded oxygen transport at the late stage of the trial. Based on an electrode lifetime of 46 days, the overall cost for H2O2 production was estimated to be ~0.88 $/kg H2O2, including an electricity cost of 0.61 $/kg and an electrode capital cost of 0.27 $/kg. With a 9 cm2 GDE and 40 mA/cm2 current density, ~2–4 mg/L of H2O2 could be produced on site for the electro-peroxone treatment of a 1.2 m3/d groundwater flow, which considerably enhanced ibuprofen abatement compared with ozonation alone (~43%–59% vs. 7%). These findings suggest that electrochemical H2O2 production with GDEs holds great promise for the development of compact treatment technologies for decentralized water treatment at a household and community level.

关键词： Advanced oxidation process     Electro-peroxone     Gas diffusion electrode     Hydrogen peroxide     Oxygen reduction    

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水·水资源·农业节水

刘更另

《中国工程科学》 2000年 第2卷 第7期   页码 39-42

摘要：

文章从水性质特点谈到中国水资源的问题，认为不能单纯用年平均降雨量的多少来判定中国水资源的状况，水资源开发利用的好坏决定于人类社会的调节和管理。中国水资源总的来说是够用的，最大问题是降水量的时空分布不平衡。

中国农民几千年来创造了许多治水蓄水用水的经验。农业节水非常重要，关键在"分散蓄水，分散使用"，以减少径流在汇集和分散过程中的损失和污染，在提高水的利用效率方面有一系列的科研和实际工作要做。

关键词： 水     水资源     农业节水     分散蓄水    

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数据驱动的信息物理生产系统——迈向安全、高效、分布式智能制造 Perspective

Manu Suvarna, Ken Shaun Yap, 杨文韬, 李君, Yen Ting Ng, 王笑楠

《工程（英文）》 2021年 第7卷 第9期   页码 1212-1223 doi: 10.1016/j.eng.2021.04.021

摘要：

随着工业4.0 和智能制造等概念和系统的普及，传统制造业将见证向新模式的转型，以更好地响应用户的需求并实现安全、高效、智能化的操作。在此背景下，本文聚焦于信息物理生产系统（CPPS）的概念，从整体上阐述了CPPS在这一产业转型中的三个关键驱动作用，即数据驱动的生产系统、分布式的智能制造和保证数据安全的集成区块链技术。通过这三个方面的具体技术和系统实现，基于数据驱动的建模和优化，智能信息物理系统将助力流程工业和制造业转型。同时，分布式的智能制造可以更高效地实现产业升级和低碳化发展。区块链技术可以进一步确保数据共享的可靠性和安全性，实现跨子系统的整合。本文详细分析了最近发表的文献研究和行业相关案例支持，并对现有挑战和发展方向进行了总结展望。

关键词： 智能制造     信息物理生产系统     工业物联网     数据分析     分布式系统     区块链    

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Upgrading to urban water system 3.0 through sponge city construction

Nanqi Ren, Qian Wang, Qiuru Wang, Hong Huang, Xiuheng Wang

《环境科学与工程前沿（英文）》 2017年 第11卷 第4期 doi: 10.1007/s11783-017-0960-4

摘要： Urban water system 3.0 (Blue, gray, brown and yellow arrows represent water flow, wastewater flow, resource and energy respectively) Facing the pressure of excessive water consumption, high pollution load and rainstorm waterlogging, linear and centralized urban water system, system 2.0, as well as traditional governance measures gradually exposed characters of water-sensitivity, vulnerability and unsustainability, subsequently resulting in a full-blown crisis of water shortage, water pollution and waterlogging. To systematically relieve such crisis, we established healthy urban water-cycling system 3.0, in which decentralized sewerage systems, spongy infrastructures and ecological rivers play critical roles. Through unconventional water resource recycling, whole process control of pollutions and ecological restoration, system 3.0 with integrated management measures, is expected to fit for multiple purposes which involve environmental, ecological, economic and social benefits. With advantages of flexibility, resilience and sustainability, water system 3.0 will show an increasingly powerful vitality in the near future.

关键词： Water crisis     Urban water system     Spongy city     Decentralized system     Multi-purpose    

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Hybrid energy harvesting systems for self-powered sustainable water purification by harnessing ambient energy

《环境科学与工程前沿（英文）》 2023年 第17卷 第10期 doi: 10.1007/s11783-023-1718-9

摘要：

● Energy harvesters harness multiple energies for self-powered water purification.

关键词： Piezocatalysis     Solar energy     Waste heat     Decentralized water treatment     Point-of-use     Nanogenerator    

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Decentralized runtime enforcement for robotic swarms

Chi Hu, Wei Dong, Yong-hui Yang, Hao Shi, Fei Deng,huchi16@nudt.edu.cn,wdong@nudt.edu.cn,shihao14@nudt.edu.cn

《信息与电子工程前沿（英文）》 2020年 第21卷 第11期   页码 1535-1670 doi: 10.1631/FITEE.2000203

摘要： s are usually designed in a bottom-up way, which can make s vulnerable to environmental impact. It is particularly true for the widely used control mode of s, where it is often the case that neither the correctness of the swarming tasks at the macro level nor the safety of the interaction among agents at the micro level can be guaranteed. To ensure that the behaviors are safe at runtime, it is necessary to take into account the property guard approaches for s in uncertain environments. is an approach which can guarantee the given properties in system execution and has no scalability issue. Although some methods have been studied and applied in different domains, they cannot effectively solve the problem of property enforcement on tasks at present. In this paper, an enforcement method is proposed on swarms which should satisfy multi-level properties in uncertain environments. We introduce a macro-micro property enforcing framework with the notion of agent shields and a discrete-time enforcing mechanism called -time enforcing. To realize this method, a domain specification language and the corresponding enforcer synthesis algorithms are developed. We then apply the approach to enforce the properties of the simulated in the robotflocksim platform. We evaluate and show the effectiveness of the method with experiments on specific unmanned aerial vehicle swarm tasks.
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双向协同的去中心化多源域自适应 Research Article

魏义康1,2,韩亚洪1,2

《信息与电子工程前沿（英文）》 2022年 第23卷 第12期   页码 1780-1794 doi: 10.1631/FITEE.2200284

摘要： 去中心化多源域自适应是指在数据去中心化场景下执行无监督多源域自适应。数据去中心化的挑战是源域与目标域在训练中缺乏跨域协同。对于无标签的目标域，目标域模型需要在源域模型的协助下迁移监督知识，而域差距会导致源域模型的适应性能有限。对于有标签的源域，源域模型在数据去中心化场景下倾向于过拟合本地数据，从而导致负迁移问题。对于以上挑战，提出双向协同的去中心化多源域自适应方法，通过其它域模型的协助进行局部源域模型与局部目标域模型的协同训练与聚合。对于目标域，我们在源域模型的协助下蒸馏监督知识，同时完全利用无标签目标域的数据来缓解域偏移问题。对于源域，我们在目标域模型的协助下正则化源域模型来避免负迁移问题。以上过程在去中心化的源域和目标域之间形成一种双向协同，以便在数据去中心化场景下提升域自适应性能。在标准多源域自适应数据集上的实验表明，我们的方法以较大优势优于现有的多源域自适应方法。

关键词： 多源域自适应；数据去中心化；域偏移；负迁移    

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Enhanced nitrogen removal and microbial analysis in partially saturated constructed wetland for treating anaerobically digested swine wastewater

Zhenfeng Han, Ying Miao, Jing Dong, Zhiqiang Shen, Yuexi Zhou, Shan Liu, Chunping Yang

《环境科学与工程前沿（英文）》 2019年 第13卷 第4期 doi: 10.1007/s11783-019-1133-4

摘要：

Anaerobically digested swine wastewater was treated by a novel constructed wetland.

Tidal operation was better for total nitrogen removal than intermittent flow.

Mechanism of nitrogen removal by biozeolite-based constructed wetland was discussed.

Simultaneous nitrification and denitrification were determined in zeolite layer.

关键词： Constructed wetland     Decentralized swine wastewater     Biozeolite     Simultaneous nitrification and denitrification     Nitrogen removal pathway    

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标题 作者 时间 类型 操作

New decentralized control technique based on substructure and LQG approaches

Ying LEI, Ying LIN,

期刊论文

Distribution of antibiotic resistance genes and their association with bacteria and viruses in decentralized

期刊论文

Comparison and modeling of two biofilm processes applied to decentralized wastewater treatment

Guanglei QIU, Yonghui SONG, Peng YUAN, Liancheng XIANG, Jianfeng PENG, Ping ZENG,

期刊论文

Performance of a hybrid anaerobic-contact oxidation biofilm baffled reactor for the treatment of decentralized

Minmin LIU,Ying ZHAO,Beidou XI,Li’an HOU,Xunfeng XIA

期刊论文

Decentralized wastewater treatment technologies and management in Chinese villages

Xuesong GUO,Zehang LIU,Meixue CHEN,Junxin LIU,Min YANG

期刊论文

有向通信拓扑下具有姿态同步跟踪预设性能的多无人机分散式容错协同控制

Zi-quan YU, Zhi-xiang LIU, You-min ZHANG, Yao-hong QU, Chun-yi SU

期刊论文

Mechanistic insight into the biofilm formation and process performance of a passive aeration ditch (PAD) for decentralized

期刊论文

Evaluation of the technoeconomic feasibility of electrochemical hydrogen peroxide production for decentralized

Yang Li, Yixin Zhang, Guangshen Xia, Juhong Zhan, Gang Yu, Yujue Wang

期刊论文

水·水资源·农业节水

刘更另

期刊论文

数据驱动的信息物理生产系统——迈向安全、高效、分布式智能制造

Manu Suvarna, Ken Shaun Yap, 杨文韬, 李君, Yen Ting Ng, 王笑楠

期刊论文

Upgrading to urban water system 3.0 through sponge city construction

Nanqi Ren, Qian Wang, Qiuru Wang, Hong Huang, Xiuheng Wang

期刊论文

Hybrid energy harvesting systems for self-powered sustainable water purification by harnessing ambient energy

期刊论文

Decentralized runtime enforcement for robotic swarms

Chi Hu, Wei Dong, Yong-hui Yang, Hao Shi, Fei Deng,huchi16@nudt.edu.cn,wdong@nudt.edu.cn,shihao14@nudt.edu.cn

期刊论文

双向协同的去中心化多源域自适应

魏义康1,2,韩亚洪1,2

期刊论文

Enhanced nitrogen removal and microbial analysis in partially saturated constructed wetland for treating anaerobically digested swine wastewater

Zhenfeng Han, Ying Miao, Jing Dong, Zhiqiang Shen, Yuexi Zhou, Shan Liu, Chunping Yang

期刊论文