检索结果-内蒙古大学图书馆

International Conference on Process control (PC)

作者： Yannik Löhr Martin Mönnigmann Martin Klaučo Martin Kalúz Automatic Control and Systems Theory Ruhr-Universität Bochum Germany Institute of Automation Information Engineering and Mathematics Slovak University of Technology Bratislava

Optimal control methods are a promising technology that may help to reduce the energy demand of domestic buildings. Paradoxically, the technical simplicity of some of the system components results in difficult optimal control problems. Heat generators and heat pumps, for example, often only accept on-off or discrete input values, which result in mixed integer programs. We tackle the issue by use of deep learning methods. Specifically, we train a neural network on optimal control policies acquired by hybrid model predictive control offline, in order to develop an implementable controller for lean embedded hardware. A case study reveals that the neural net is able to mimic the control performance of the predictive controller. The trained neural net was implemented on lean embedded hardware, where the evaluation could be performed in less than 7 ms.

关键词： Heat pumps Space heating Neural networks Optimal control Buildings Predictive control

来源：评论

学校读者我要写书评

暂无评论

Extremum Seeking Algorithms based on Non-Commutative Maps

引用

IFAC-PapersOnLine 2019年第16期52卷 688-693页

作者： Jan Feiling Christophe Labar Victoria Grushkovskaya Emanuele Garone Michel Kinnaert Christian Ebenbauer Institute for Systems Theory and Automatic Control University of Stuttgart Germany Dr. Ing. h.c. F. Porsche AG Stuttgart Germany Department of Control Engineering and System Analysis Université libre de Bruxelles Belgium Institute for Mathematics Julius-Maximilians-University Würzburg Germany

In this work, discrete-time extremum seeking algorithms for unconstrained optimization problems are developed. A general class of non-commutative maps and one- and two point function evaluation polices are presented to approximate a gradient-descent algorithm, suitable for extremum seeking problems. Moreover, adaptive step size rules are discussed to achieve faster convergence and vanishing steady state oscillations.

关键词： Extremum Seeking Optimization Adaptive control Discrete-Time Systems

来源：评论

学校读者我要写书评

暂无评论

Typhoon-Induced Stormwater Drives Nutrient Dynamics and Triggers Phytoplankton Blooms in Laizhou Bay, China

SSRN

引用

SSRN 2023年

作者： Li, Hongguan Li, Shanshan Zhang, Mingzheng Li, Xiuren Xu, Zehao Ma, Haoyang Liang, Shengkang Song, Dehai Li, Junlong Ma, Yuanqing Qin, Huawei Ji, Diansheng Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao266100 China College of Chemistry and Chemical Engineering Ocean University of China Qingdao266100 China College of Oceanic and Atmospheric Sciences Ocean University of China Qingdao266100 China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Qingdao266237 China Key Laboratory of Physical Oceanography Ocean University of China Ministry of Education Qingdao National Laboratory for Marine Science and Technology Qingdao China State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring China National Environmental Monitoring Center Beijing100012 China Shandong Marine Resources and Environment Research Institute Yantai264000 China National Marine Environmental Monitoring Center China

The heavy rainfall brought by typhoons result in pulsed inputs of freshwater and nutrients, causing drastic changes in the offshore hydrographic and biogeochemical conditions in a short time. In this study, we evaluated the heavy rainfall impact of Typhoons Rumbia and Lekima on Laizhou Bay (LZB). We found that torrential rainfall significantly modified riverine nutrient concentrations, component ratios, and fluxes. Our results demonstrated that 9% and 16% of the annual riverine total nitrogen (TN) and total phosphorus (TP) fluxes were transported to the LZB within two weeks in Rumbia, and the proportions were 17% and 35% in Lekima, respectively. Influenced by terrestrial inputs, the sea surface temperature (SST) and sea surface salinity (SSS) decreased postRumbia, while the dissolved inorganic nitrogen (DIN) increased from 0.13 ± 0.13 mg/L to 0.47 ± 0.32 mg/L. Furthermore, the SST and SSS decreased by approximately 2.5 ℃ and 2.3 psu postLekima, and the concentration of DIN increased from 0.13 ± 0.08 mg/L to 0.58 ± 0.48 mg/L, which induced subsequent diatom blooms. However, rapid luxury uptake of dissolved inorganic phosphorus (DIP) by phytoplankton resulted in the LZB remaining under P-limited conditions. Freshwater and nutrient pulse input accelerated the growth of highly adaptable and small diatoms in coastal waters, and the dominant species transitioned to Skeletonema costatum after Lekima. We suggest that excess freshwater inputs alter the hydrodynamic structure and residence time, combined with other suitable factors, resulting in a dramatic increase in Noctiluca scintillans and the formation of harmful algal blooms (HABs) after a decline in diatom blooms. © 2023, The Authors. All rights reserved.

关键词： Nutrients

来源：评论

学校读者我要写书评

暂无评论

Activation of persulfate by swine bone derived biochar: Insight into the specific role of different active sites and the toxicity of acetaminophen degradation pathways

引用

The Science of the total environment 2022年第PT 3期807卷 151059页

作者： Xuerong Zhou Cui Lai Shiyu Liu Bisheng Li Lei Qin Xigui Liu Huan Yi Yukui Fu Ling Li Mingming Zhang Huchuan Yan Jing Wang Ming Chen Guangming Zeng College of Environmental Science and Engineering Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Changsha 410082 PR China Key Laboratory of Reservoir Aquatic Environment Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 PR China. College of Environmental Science and Engineering Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Changsha 410082 PR China. College of Environmental Science and Engineering Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology Guilin University of Technology Guilin 541004 PR China. Key Laboratory of Reservoir Aquatic Environment Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 PR China. Electronic address: chenming@***. College of Environmental Science and Engineering Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Changsha 410082 PR China. Electronic address: zgming@***.

Recently, persulfate (PS) activation system has grown up as a primary branch of advanced oxidation processes, and biochar has been recognized as a potential nonmetal material in this field. However, few studies have focused on the corresponding relationship between actives sites on biochar and active species in AOPs. To pave this way, similar biochar (obtained from different pyrolysis temperature) with different functional structures were involved. In this study, biochar derived from swine bone (BBC) was applied in PS activation system to degrade acetaminophen (ACT). The results showed that both radical and non-radical pathway worked in the PS/BBCs systems, and the degradation rate (from 0.1042 to 0.4364 min) climbed with the increase of pyrolysis temperature (from 700 to 900 °C). To probe into the corresponding relationship between functional structure and active species, the effect of pyrolysis temperature on functional structure was analyzed. It came out that 1) defects could act as active sites for various active species; 2) persistent free radicals could do favor to the generation of O and O; 3) hydroxyapatite in swine bone only served as hard templet for the porous structure. ACT degradation process was measured by Liquid chromatograph-mass spectrometer, and Scendesmus obliquus was applied to investigate the toxicity of PS/BBCs system. It illustrated that the existence of SO mainly contributed to the generation of high toxic intermediates (such as biphenyl and diphenyl ether) in the PS/BBCs system. Furthermore, the enhancement of adsorption capacity would mitigate the toxicity of PS/BBCs systems to some extent.

关键词： Biochar Catalysis Intermediates Persulfate activation system Toxicity

来源：评论

学校读者我要写书评

暂无评论

Maneuver Identification for Interaction-Aware Highway Lane Change Behavior Planning based on Polygon Clipping and Convex Optimization

Maneuver Identification for Interaction-Aware Highway Lane C...

引用

International Conference on Intelligent Transportation

作者： Manuel Schmidt Christian Wissing Jan Braun Till Nattermann Torsten Bertram Institute of Control Theory and Systems Engineering TU Dortmund University Dortmund Germany ZF Group Active & Passive Safety Technology Düsseldorf Germany

ISBN: (纸本)9781538670255

This contribution presents A-D-PolyC QP (Automated Driving using Polygon Clipping and Quadratic Programming), a framework for lane change behavior planning of automated vehicles on highways. It solves the tactical decision problem that arises through the presence of more than one lane change maneuver variant in traffic scenes. A-D-PolyC QP derives all variants deterministically using polygon clipping in spatiotemporal domain and is able to deal with lane changes of surrounding traffic participants. All variants are encoded in a directed graph. The nodes in the graph correspond to spatiotemporal free space polygons and allow the derivation of constraints for trajectory optimization in a Frenet-Serret coordinate frame. Novel, linear time-variant Time-To-Collision and Time Gap constraints based on geometric boundaries are introduced. Interaction-awareness is incorporated by forward simulation of the optimized trajectories. Finally each maneuver is assessed and features are calculated that allow the decision for one lane change maneuver by a higher-level function.

关键词： Spatiotemporal phenomena Planning Topology Space vehicles Trajectory optimization Safety

来源：评论

学校读者我要写书评

暂无评论

Restoration boosts soil P-cycle multifunctionality in karst ecosystems by modulating soil properties and rare bacterial taxa

引用

Journal of Integrative Agriculture 2025年

作者： Fujing Pan Xuan Yu Yueming Liang Peilei Hu Kelin Wang Wei Zhang Qian Yang Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology/College of Environmental and Engineering Guilin University of Technology Guilin 541006 China University Engineering Research Center of Watershed Protection and Green Development Guangxi Guilin University of Technology Guilin 541006 China Karst Dynamics Laboratory of Ministry of Natural Resources Institute of Karst Geology Chinese Academy of Geological Sciences Guilin 541004 China Institute of Subtropical Agriculture Chinese Academy of Sciences Changsha 410125 China Huanjiang Agriculture Ecosystem Observation and Research Station of Guangxi/Guangxi Key Laboratory of Karst Ecological Processes and Services/Huanjiang Observation and Research Station for Karst Ecosystems Chinese Academy of Sciences Huanjiang 547100 China

Phosphorus (P) is an essential nutrient element that is critical for plant growth and ecosystem functionality. The soil P cycle plays multiple roles, such as sustaining plant growth and productivity, regulating nutrient balance within ecosystems, and enhancing ecosystem adaptability and resilience. This cycle is influenced by factors such as the restoration approach and microbial community dynamics. However, the extent to which the restoration approach alters the P cycle in karst ecosystems and the underlying microbial mechanisms remain poorly understood. The P-cycle multifunctionality index (P-cycle MFI) serves as a comprehensive indicator for evaluating soil P cycle function, and it provides insights into changes in the P cycle between different restoration approaches. To investigate the shifts in soil P-cycle MFI and microbial mechanisms between different restoration approaches, we analyzed soil available P (AP), total P (TP), microbial biomass P (MBP), and the activities of acid phosphatase (ACP) and alkaline phosphatase (ALP). These data were used to calculate the P-cycle MFI by averaging the Z-scores between two restoration approaches (artificial restoration of forest (AF) and natural restoration of forest (NF)) and a control (cropland, CP) at six subtropical karst ecosystem sites in China. We also determined the soil organic carbon (SOC), exchangeable calcium (Ca) and magnesium (Mg), pH, bulk density (BD), microbial biomass C (MBC), and microbial biomass nitrogen (MBN), as well as the community structure, relative abundance, diversity indices, and co-occurrence networks of phoD -harboring bacteria. The results showed that the community structure of phoD -harboring bacteria varied significantly among AF, NF, and CP and across different temperature gradients. These bacteria exhibited increasing complexity and tightness in co-occurrence networks from CP to AF and then to NF, along with the ACP and ALP activities, but not the TP and AP contents. The P-cycle MFI v

关键词： Karst ecosystem restoration community phoD -harboring bacteria P-cycle multifunctionality rare taxa

来源：评论

学校读者我要写书评

暂无评论

Hybrid Online Multi-Sensor Error Detection and Functional Redundancy for Artificial Pancreas control Systems

引用

IFAC-PapersOnLine 2018年第18期51卷 138-143页

作者： Feng, Jianyuan Hajizadeh, Iman Samadi, Sediqeh Sevil, Mert Hobbs, Nicole Brandt, Rachel Lazaro, Caterina Maloney, Zacharie Yu, Xia Littlejohn, Elizabeth Quinn, Laurie Cinar, Ali Department of Chemical and Biological Engineering Illinois Institute of Technology ChicagoIL United States Department of Biomedical Engineering Illinois Institute of Technology IL United States Department of Electrical and Computer Engineering Illinois Institute of Technology ChicagoIL United States Department of Control Theory and Control Engineering Northeastern University ShenyangLiaoning China Department of Pediatrics University of Chicago ChicagoIL United States College of Nursing University of Illinois at Chicago ChicagoIL United States

Sensor errors limit the performance of a supervision and control system. Sensor accuracy can be affected by many factors such as extreme working conditions, sensor deterioration and interferences from other devices. It may be difficult to distinguish sensor errors and real dynamic changes in a system. A hybrid online multi-sensor error detection and functional redundancy (HOMSED&FR) algorithm is developed to monitor the performance of multiple sensors and reconcile the erroneous sensor signals. The algorithm relies on two methods, outlier-robust Kalman filter (ORKF) and a locally-weighted partial least squares (LW-PLS) regression model. The two methods have different way of using data, ORKF is comparing current signal samples with the signal trace indicated by previous samples and LW-PLS is comparing samples in the past window with the samples from a database and uses the samples with the most similarity to build a model to predict the current signal values. The performance of this system is illustrated with a clinical case involving artificial pancreas experiments, which include data from a continuous glucose monitoring (CGM) sensor, and energy expenditure (EE) and Galvanic Skin Response (GSR) information based on wearable sensors that collect data from people with type 1 diabetes. The results indicate that the proposed method can successfully detect most of the erroneous signals and substitute them with reasonably estimated values computed by the functional redundancy system. © 2018

关键词： Wearable sensors Artificial organs control systems Deterioration Electrophysiology Error detection Kalman filters Least squares approximations Online systems Redundancy Regression analysis Signal detection Continuous glucosemonitoring (CGM) Galvanic skin response Multi sensor Partial least square (PLS) Partial least squares regression Robust Kalman filters Sensor errors Sensor redundancy

来源：评论

学校读者我要写书评

暂无评论

Spin-state Conversion by Asymmetrical Orbital Hybridization in Ni-doped Co3O4to Boost Singlet Oxygen Generation for Microbial Disinfection

引用

Angewandte Chemie 2024年第12期136卷

作者： Meilin Duan Chao Huang Gong Zhang Hao Shi Pengfei Zhang Limin Li Tong Xu Zhen Zhao Zhujun Fu Jingrui Han Yuanhong Xu Xiaoteng Ding Institute of Biomedical Engineering College of Life Sciences Qingdao University Qingdao 266071 P.R. China Institute of Biomedical Engineering College of Medicine Southwest Jiaotong University Chengdu 610031 Sichuan China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China Department of Urology The Affiliated Hospital of Qingdao University Qingdao 266071 P.R. China Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao 266100 P.R. China School of Materials Science and Engineering Tianjin University Tianjin 300350 P.R. China

Singlet oxygen ( 1 O 2 ) plays a significant role in environmental and biomedical disinfection fields. Electrocatalytic processes hold great potential for 1 O 2 generation, but remain challenging. Herein, a facile Ni doping converted spin-state transition approach is reported for boosting 1 O 2 production. Magnetic analysis and theoretical calculations reveal that Ni occupied at the octahedral site of Co 3 O 4 can effectively induce a low-to-high spin-state transition. The high-spin Ni−Co 3 O 4 generate appropriate binding strength and enhance electron transfer between the Co centers with oxygen intermediates, thereby improving the catalytic activity of Ni−Co 3 O 4 for effective generating 1 O 2 . In neutral conditions, 1×10 6 CFU mL −1 Gram-negative ESBL-producing Escherichia coli ( E. coli ) could be inactivated by Ni−Co 3 O 4 system within 5 min. Further antibacterial mechanisms indicate that 1 O 2 can lead to cell membrane damage and DNA degradation so as to irreversible cell death. Additionally, the developed Ni−Co 3 O 4 system can effectively inactivate bacteria from wastewater and bioaerosols. This work provides an effective strategy for designing high-spin electrocatalysis to boost 1 O 2 generation for disinfection process.

关键词： singlet oxygen spin-related orbital interaction entropy advanced oxidation processes microbial disinfection ROS regulation

来源：评论

学校读者我要写书评

暂无评论

Stable IL- 1β-Activation in an Inflammasome Signalling Model Depends on Positive and Negative Feedbacks and Tight Regulation of Protein Production

引用

IEEE/ACM transactions on computational biology and bioinformatics 2019年第2期16卷 627-637页

作者： Fernando Lopez-Caamal Heinrich J Huber Chemical Engineering Department Universidad de Guanajuato Noria Alta s/n Guanajuato Guanajuato México Institute for Automation Engineering (IFAT) Laboratory for Systems Theory and Automatic Control Otto-von-Guericke University Magdeburg Magdeburg Germany

INTRODUCTION:NLRP3-dependent inflammasome signalling is a key pathway during inflammatory processes and its deregulation is implicated in several diseases. NLRP3-inflammasome pathway activation leads to the rapid, phosphorylation-driven NF$\kappa$κB-pathway signalling, subsequently proceeds via slower transcription/translation process for producing pro-enzymes, and finally leads to the medium-speed enzymatic activation of the central inflammatory mediator IL-$1\beta$1β[1] . We here were interested in how the timing of the rate-limiting step of transcription/translation and the presence of a positive and negative auto-regulation would pose conditions for meaningful and stable IL-$1\beta$1β-activation. METHODS:We extracted the essential topology of the inflammasome pathway network using a linear chain of first-order reaction and a second-order reaction for inhibitory feedback. We then performed an analytical treatment of the resulting ODE set to obtain closed-form formulae. We therefore looked for the steady states and characterized their stability by using a Jacobian-based, local analysis. We employed the Small Gain Theorem from control theory as recently applied by us [2] and the Gershgorin Circle Theorem to obtain mathematically exact conditions for a positive ON state and stabilities for ON and OFF steady states. RESULTS:We identified an ON- and one OFF- steady state whose properties we characterized in terms of the kinetic parameters by closed-form formulae. We found that under the assumption of a first-order information flow through the network, the existence of a biologically reasonable ON steady state required the simultaneous presence of the positive and the negative feedback. Assuming non-competitivity between IL-$1\beta$1β entities binding to different receptors, we found that a minimum kinetics for protein production is required to sustain a steady state with IL-$1\beta$1β activation. Assuming competitivity between IL-$1\beta$1β entities introduced additio

关键词： Steady State Proteins Biological System Modeling Negative Feedback Production Mathematical Model NLRP 3 Inflammasome IL-1 Z_$\beta$_Z β Interleukin 1 Local Stability Analysis Steady States Stability Positive Feedback Negative Feedback Synthetic Biology

来源：评论

学校读者我要写书评

暂无评论

Event-triggered Learning for Linear Quadratic control

arXiv

引用

arXiv 2019年

作者： Schlüter, Henning Solowjow, Friedrich Trimpe, Sebastian Intelligent Control Systems Group Max Planck Inst. for Intelligent Systems Stuttgart70569 Germany Institute for Systems Theory and Automatic Control University of Stuttgart Stuttgart70550 Germany Institute for Data Science in Mechanical Engineering RWTH Aachen University Aachen52068 Germany

When models are inaccurate, the performance of model-based control will degrade. For linear quadratic control, an event-triggered learning framework is proposed that automatically detects inaccurate models and triggers the learning of a new process model when needed. This is achieved by analyzing the probability distribution of the linear quadratic cost and designing a learning trigger that leverages Chernoff bounds. In particular, whenever empirically observed cost signals are located outside the derived confidence intervals, we can provably guarantee that this is with high probability due to a model mismatch. With the aid of numerical and hardware experiments, we demonstrate that the proposed bounds are tight and that the event-triggered learning algorithm effectively distinguishes between inaccurate models and probabilistic effects such as process noise. Thus, a structured approach is obtained that decides when model learning is beneficial. Copyright © 2019, The Authors. All rights reserved.

关键词： Stochastic systems

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：