检索结果-内蒙古大学图书馆

SSRN 2024年

作者： Jia, Jingqing Chen, Shuming Zhao, Yongnan Qian, Feng The State Key Laboratory of Automotive Simulation and Control Jilin University Changchun130022 China Chongqing Research Institute Jilin University Chongqing401123 China

Convex combination schemes with fast tracking ability and good steady-state restoration performance have attracted wide attention in Active Noise control (ANC) systems. The scheme can combine the output of multiple filters and show robustness even if the estimation of the secondary path is not accurate, so as to improve the overall performance. In addition, compared with the conventional filtered-x least mean square (CFXLMS) algorithm, the time-frequency domain FXLMS (TF-FXLMS) algorithm can compute gradient estimates and filter reference signals in the frequency domain to reduce the computation, while updating the control signal in the time domain to avoid delays. In this paper, a convex combination of normalized filtered-X least mean square (NFxLMS) algorithm and TF-FxLMS algorithm is proposed based on the characteristics of the above two structures and algorithms. In addition, in order to further reduce the amount of computation, the NFxLMS algorithm is decomposed into NFxLMS algorithm and TF-FxLMS algorithm by means of partial updating of weight matrix. In this paper, the computational complexity of the proposed algorithm is analyzed and compared with the traditional algorithm. The simulation results show that the proposed algorithm has better noise reduction effect than the traditional algorithm under the noise input conditions of various driving conditions. At the same time, it has the advantage of lower computational complexity. © 2024, The Authors. All rights reserved.

关键词： Active noise control

来源：评论

学校读者我要写书评

暂无评论

Mnnx-Carbon-Silica-Framework for Highly Efficient Heterogeneous Catalytic Ozonation of Electron-Rich Organics Through Nonradical Pathway

SSRN

引用

SSRN 2023年

作者： Chen, Shuning Ren, Tengfei Lu, Kechao Ouyang, Changpei Huang, Xia Zhang, Xiaoyuan State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Heterogeneous catalytic ozonation (HCO) is considered as a powerful technique for wastewater treatment and tuning the active sites of catalysts can adjust the HCO pathway of removing organics. The traditional hydroxyl radical pathway may be affected by wastewater matrix. In comparison, nonradical pathway such as 1O2 pathway and intra-electron transfer makes it a promising choice for electron-rich organics. In this study, we proposed MnNx loaded Carbon-Silica-Framework (MnNx-CSF) for selective removal for electron-rich organics and stable mechanical strength for catalytic ozonation. The results showed that the TOC removal for p-HBA was 81% in MnNx -CSF HCO within 30 min, while only 44% and 22% of TOC was removed after 30 min in the Mn-SiO2 HCO process and ozonation process. The N species were considered to be related to catalytic efficiency, and the graphitic N and pyridine N might be the relevant active N species in MnNx-CSF. Pyridine N could coordinate with Mn atoms, and the active site MnN4 showed a high tendency to adsorb O3 and decompose it into *Oads and 1O2. Graphitic N could also enhance the electron transfer pathway to degrade organics. Modulating N species and metal doping is considered to be a promising strategy to regulate the catalysts to achieve catalytic ozonation through a nonradical way. The results highlighted that experiments with theoretical calculations clearly showed that metal/N catalysts were effective for catalytic ozonation to degrade electron-rich organics. © 2023, The Authors. All rights reserved.

关键词： Silica

来源：评论

学校读者我要写书评

暂无评论

Multi-Type Electric Vehicle Schedulability Modeling Method based on User Charging Behavior Characteristics 11

Multi-Type Electric Vehicle Schedulability Modeling Method b...

引用

11th China International Conference on Electricity Distribution, CICED 2024

作者： Xue, Yinjuan Chen, Qifang Cai, Haiqing Xia, Mingchao Gu, Haohan School of Electrical Engineering Beijing Jiaotong University Beijing China State Key Laboratory of Hvdc Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&d Centre Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China Csg Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9798350368345

With the rapid proliferation of Electric Vehicles (EV s), effectively leveraging the regulation potential of EV charging loads has become a prominent issue. This paper proposes a multi-type EV schedulability modeling method based on the analysis of charging behavior characteristics of different user types. The model comprehensively considers the charging characteristics of various types of EV s, including private cars, ride-hailing vehicles, and taxis, utilizing a charging start-stop probability distribution model. Case studies demonstrate that this model can not only accurately reflect the charging demands of EV s but also provide valuable references for strategies involving EV fleet participation in grid regulation. © 2024 IEEE.

关键词： Charging stations

来源：评论

学校读者我要写书评

暂无评论

Multi-Timescale Trading Strategy for Renewable Power to Ammonia Virtual Power Plant in the Electricity, Hydrogen, and Ammonia Markets

IEEE Transactions on Energy Markets, Policy and Regulation

引用

IEEE Transactions on Energy Markets, Policy and Regulation 2023年第4期1卷 322-335页

作者： Wu, Sirui Lin, Jin Li, Jiarong Liu, Feng Song, Yonghua Xu, Yanhui Cheng, Xiang Yu, Zhipeng Tsinghua University State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Beijing100087 China Tsinghua University Sichuan Energy Internet Research Institute Chengdu610213 China University of Macau Department of Electrical and Computer Engineering Macau999078 China Tsinghua University Department of Electrical Engineering Beijing100087 China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing102206 China

Renewablepower to ammonia (RePtA) is a prominent zero-carbon pathway for decarbonization. Due to the imbalance between renewables and production energy demand, the RePtA system relies on electricity exchange with the power grid. Participating in the electricity market as a virtual power plant (VPP) may help to reduce energy costs. However, the power profile of local photovoltaics and wind turbines is similar to those in the market, resulting in rising energy costs under the conventional strategy. Hence, we develop a multi-timescale trading strategy for the RePtA VPP in the electricity, hydrogen, and ammonia markets. By utilizing the hydrogen and ammonia buffer systems, the RePtA VPP can optimally coordinate production planning. Moreover, we find it possible to describe the trading of electricity, ammonia, and hydrogen in a unified timeframe. The two-stage robust optimization model of the electricity market is extended to multiple markets and solved by the column and constraint generation (CC&G) algorithm. The case is derived from an actual project in the Inner Mongolia Autonomous Region. Sensitivity analysis demonstrates the economic advantages of the RePtA VPP joining multiple markets over the conventional strategy and reveals the necessity of the hydrogen and ammonia buffer and reactor flexibility. © 2023 IEEE.

关键词： Ammonia

来源：评论

学校读者我要写书评

暂无评论

Antibiotic resistance genes in manure-amended paddy soils across eastern China:Occurrence and influencing factors

引用

Frontiers of Environmental Science & Engineering 2022年第7期16卷 101-111页

作者： Yuwei Guo Xian Xiao Yuan Zhao Jianguo Liu Jizhong Zhou Bo Sun Yuting Liang School of Environmental and Safety Engineering Changzhou UniversityChangzhou213164China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing210008China Institute for Environmental Genomics Department of Microbiology and Plant Biologyand School of Civil Engineering and Environmental SciencesUniversity of OklahomaNormanOK73019USA State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Earth and Environmental Sciences Lawrence Berkeley National LaboratoryBerkeleyCA94270USA

Pig manure,rich in antibiotics and metals,is widely applied in paddy fields as a soil conditioner,triggering the proliferation of antibiotic resistance genes(ARGs)in ***,comprehensive studies on the effects of manure fertilization on the abundance of ARGs and their influencing factors are still ***,pig manure and manure-amended and inorganic-amended soils were collected from 11 rice-cropping regions in eastern China,and the accumulation of antibiotics,metals,and ARGs was assessed *** results showed that manure fertilization led to antibiotic residues and increased the metal content(i.e.,Zn,Cu,Ni,and Cr).Tetracycline and sulfonamide resistance genes(tetM,tetO,sul1,and sul2)were also significantly enhanced with manure *** to variance partitioning analysis,the most important factors that individually influenced ARGs were soil physicochemical properties,accounting for 12%of the *** correlations between soil nutrients and ARGs indicated that manure application enhanced the growth of resistant microorganisms by supplying more *** and antibiotics contributed 9%and 5%to the variations in ARGs,*** co-occurrence also increased the enrichment of ARGs,as their interactions accounted for 2%of the variation in ***,Cu was significantly related to most ARGs in the soil(r=0.26–0.52,p<0.05).Sulfapyridine was significantly related to sul2,and tetracycline resistance genes were positively related to *** study highlighted the risks of antibiotic and ARG accumulation with manure fertilization and shed light on the essential influencing factors of ARGs in paddy soils.

关键词： Pig manure Antibiotics Metals Antibiotic resistance genes Paddy fields

来源：评论

学校读者我要写书评

暂无评论

Three-Dimensional Vortex Structure Identification of Fluid Coupling and Analysis of Spatial-Temporal Evolution Mechanism

Three-Dimensional Vortex Structure Identification of Fluid C...

引用

Aerospace and Aeronautics World Forum, 2021

作者： Chai, Bosen Yan, Dong Zhang, Jin Zuo, Wenjie Wang, Guangyi School of Mechanical and Aerospace Engineering Jilin University Changchun Jilin130025 China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun Jilin130025 China Sinotest Equipment Co. Ltd. Changchun Jilin130103 China

ISBN: (纸本)9789811989544

The interior of fluid coupling is full of turbulent and multi-scale vortex flow. The generation, development and interaction of the multi-scale vortex structure dominate the overall internal flow. Accurate identification of unsteady multi-scale vortex structure characteristics is extremely important for revealing the law of flow and the mechanism of energy conversion and loss mechanism. The flow field of fluid coupling under braking condition is numerically simulated based on the advanced turbulence model. The temporal and spatial evolution characteristics of the three-dimensional vortex structure inside the pump wheel and turbine are extracted based on different vortex recognition methods, and the results are compared with the flow field visualization test. The accuracy and applicability of the extraction results for different vortex recognition methods are analyzed. The results show that: the threshold selection of Q method extraction vortex structure is blind. It is difficult to capture both strong and weak vortices at the same time. Ω method can accurately capture the weak vortex structure within a large threshold range. Ω-Liutex method is not sensitive to threshold selection, and it is the most effective in extracting vortex structure. From the perspective of the temporal and spatial evolution of the three-dimensional vortex structure, Ω-Liutex method can reveal the mechanism of energy conversion and loss best. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Vortex flow

来源：评论

学校读者我要写书评

暂无评论

Aerobic granular sludge formation based on substrate availability:Effects of flow pattern and fermentation pretreatment

引用

Frontiers of Environmental Science & Engineering 2020年第3期14卷 155-164页

作者： Quan Yuan Hui Gong Hao Xi Kaijun Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

The influences of flow patterns(mixed-flow and plug-flow)and fermentation pretreatment on aerobic granular sludge(AGS)formation with various substrate availability levels were investigated by running four identical laboratory-scale sequencing batch reactors(R1-R4),comparing two anaerobic feeding strategies and three kinds of substrates.R1 achieved faster granulation with a fast influent fill step followed by a modified anaerobic mixed-flow phase,but the AGS showed poorer stability with a cracked structure and a high suspended solids concentration in the *** anaerobic plug-flow feeding mode(with influent fed slowly from the bottom)in R2 provided deeper penetration depth for the substance to reach the core of A G S and accordingly strengthen A G S *** acidogenic upflow sludge bed reactor was introduced as a pretreatment to improve the AGS performance by enhancing glucose pre-fermentation(R4).AGS fed with mixed volatile fatty acids(VFA)after glucose fermentation showed similar performance compared with the reactor fed with acetate in the aspects of stability,structure,size distribution and nitrogen removal efficiency,and 74%similarity in the microbial *** actual wastewater with low VFA concentrations,fermentation treatment was suggested as a promising pretreatment for stable AGS granulation and operation.

关键词： Anaerobic plug-flow feeding mode Anaerobic mixed-flow mode Fermentation pretreatment Substrate gradient Penetration depth

来源：评论

学校读者我要写书评

暂无评论

Titanium Mesh as the Anode of Electrochemically Active Biofilm Sensor for Improved Sensitivity in Water Toxicity Real-Time Early-Warning

SSRN

引用

SSRN 2023年

作者： Liu, Xinning Qi, Xiang Gu, Yuyi Huang, Xia Liang, Peng State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

As serious water ecological pollution caused by toxicant leakage occurs frequently, early-warning for toxicity presented in water environment attracts increasing attentions as it saves time to retain water safety and human health. Electrochemically active biofilm (EAB) sensor is a promising device for in situ real-time water toxicity early-warning. To improve the sensitivity of EAB sensor particularly for low-concentration toxicity warning, this study employed titanium mesh (TiM) as the anode to construct an EAB sensor. Compared to traditional EAB sensor with carbon felt (CF) anode, the sensitivity of the TiM sensor was increased upto 37.4 times. The effects of mesh size (TiM50, TiM100, TiM150) and operation mode (flow-by and flow-through) on the sensitivity of TiM sensors were further investigated. Results showed the sensor with TiM100 anode had the highest inhibition rate (IR) in flow-by mode, attributed to low charge transfer resistance (Rct) and fast mass transfer. Flow-through operation could further enhance TiM100 sensor’s sensitivity from flow-by operation and succeeded to signal as low as 0.0025% formaldehyde, the lowest so far tested in EAB sensor with sensing anode. Multiple toxicity shocks on flow-through TiM100 sensor revealed its good recoverability towards all tested formaldehyde concentration from 0.01% to 0.0025%, during which electrochemical activity degradation and biomass accumulation partially impaired the repeatability. This work highlights the great improvement of EAB sensors by utilizing titanium mesh as EAB carrier and provides a reference for the practical application of metallic materials for EAB sensors. © 2023, The Authors. All rights reserved.

关键词： Anodes

来源：评论

学校读者我要写书评

暂无评论

Uncertainty and Sensitivity Analysis of Electrical-Thermal Performance in Module Consisting of Parallel-Connected Batteries

SSRN

引用

SSRN 2024年

作者： Liu, Hongkai Li, Ming Wang, Yuncong College of Automotive Engineering Jilin University Changchun130025 China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun130025 China

An accurate calculation of electrical-thermal performance is a precondition for module consisting of parallel-connected batteries design. This paper develops a method that takes into account the polarization effect when calculating the current distribution in parallel-connected batteries. A Monte Carlo technique is employed to confirm the probability distribution of five electrical-thermal performance indices, considering the uncertainty in battery capacity and direct current (DC) resistance due to manufacturing tolerance. The sensitivity of capacity, DC resistance and connector plate resistance are discussed at various charge rates and number of batteries using two sensitivity methods. The results indicate that most indices have approximately 50% probability of being higher or lower due to uncertainty parameters. The connector plate resistance is the dominant sensitivity factor and its minimization is preferable. At charge rate 1C, lower capacity and DC resistance for the last battery in 10 parallel-connected batteries can improve charge uniformity. Meanwhile, increasing capacity and DC resistance of the first battery will be beneficial to electrical performance, whereas decreasing them will improve its thermal performance. Furthermore, adjusting the capacity and DC resistance of the first and last batteries during module assembly can reduce the uncertainty in electrical-thermal performance by approximately 28.57% to 77.77%. © 2024, The Authors. All rights reserved.

关键词： Uncertainty analysis

来源：评论

学校读者我要写书评

暂无评论

One-step ball milling-prepared nano Fe2O3 and nitrogendoped graphene with high oxygen reduction activity and its application in microbial fuel cells

引用

Frontiers of Environmental Science & Engineering 2020年第2期14卷 185-195页

作者： Xingguo Guo Qiuying Wang Ting Xu Kajia Wei Mengxi Yin Peng Liang Xia Huang Xiaoyuan Zhang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Developing high activity,low-cost and long durability catalysts for oxygen reduction reaction is of great significance for the practical application of microbial fuel *** ftill exposure of active sites in catalysts can enhance catalytic activity ***,novel Fe-N-doped graphene is successftilly synthesized via a one-step in situ ball milling *** graphite,ball milling graphene,N-doped graphene and Fe-N-doped graphene are applied in air cathodes,and enhanced performance is observed in microbial fuel cells with graphene-based ***,Fe-Ndoped graphene achieves the highest oxygen reduction reaction activity,with a maximum power density of 1380±20 mW/m^2 in microbial fUel cells and a current density of 23.8 A/m^2 at-0.16 V in electrochemical tests,which are comparable to commercial Pt and 390%and 640%of those of pristine *** investigation of the material characteristics reveals that the superior performance of Fe-Ndoped graphene results from the full exposure of Fe2O3 nanoparticles,pyrrolic N,pyridinic N and excellent Fe-N-G active sites on the graphene *** work not only suggests the strategy of maximally exposing active sites to optimize the potential of catalysts but also provides promising catalysts for the use of microbial fuel cells in sustainable energy generation.

关键词： Microbial fuel cells Air cathodes Nano Fe2O3 and nitrogen-doped graphene Oxygen reduction reaction

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：