检索结果-南通市图书馆

Cloud-Model-Based Feature Engineering to Analyze the Energy-Water Nexus of a Full-Scale Wastewater Treatment Plant

Engineering 2024年第5期36卷 63-75页

作者： Shan-Shan Yang xin-lei yu Chen-Hao Cui Jie Ding lei He Wei Dai Han-Jun Sun Shun-Wen Bai yu Tao Ji-Wei Pang Nan-Qi Ren State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150000China Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Civil and Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China China Energy Conservation and Environmental Protection Group Beijing 100089China

Wastewater treatment plants(WWTPs)are important and energy-intensive municipal *** energy consumption and relatively low operating performance are major challenges from the perspective of carbon ***,water-energy nexus analysis and models for WWTPs have rarely been reported to *** this study,a cloud-model-based energy consumption analysis(CMECA)of a WWTP was conducted to explore the relationship between influent and energy consumption by clustering its influent’s *** principal component analysis(PCA)and K-means clustering were applied to classify the influent condition using water quality and volume *** energy consumption of the WWTP is divided into five standard evaluation levels,and its cloud digital characteristics(CDCs)were extracted according to bilateral constraints and golden ratio *** results showed that the energy consumption distribution gradually dispersed and deviated from the Gaussian distribution with decreased water concentration and *** days with high energy efficiency were extracted via the clustering method from the influent category of excessive energy consumption,represented by a compact-type energy consumption distribution curve to identify the influent conditions that affect the steady distribution of energy *** local WWTP has high energy consumption with 0.3613 kW·h·m^(-3)despite low influent concentration and volumes,across four consumption levels from low(I)to relatively high(IV),showing an unsatisfactory operation and management *** average oxygenation capacity,internal reflux ratio,and external reflux ratio during high energy efficiency days recognized by further clustering were obtained(0.2924-0.3703 kg O_(2)·m^(-3),1.9576-2.4787,and 0.6603-0.8361,respectively),which could be used as a guide for the days with low energy ***,this study offers a water-energy nexus analysis method to identify influent conditions with operational manageme

关键词： Wastewater treatment plants Cloud-model theory Data mining Principal component analysis K-means clustering Cloud-model-based energy consumption analysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Behavior of exciton in direct−indirect band gap Al_(x)Ga_(1−x)As crystal lattice quantum wells

引用

Journal of Semiconductors 2024年第3期45卷 64-70页

作者： Yong Sun Wei Zhang Shuang Han Ran An xin-Sheng Tang xin-lei yu Xiu-Juan Miao xin-Jun Ma Xianglian Pei-Fang Li Cui-Lan Zhao Zhao-Hua Ding Jing-Lin Xiao Institute of Condensed Matter Physics Inner Mongolia Minzu UniversityTongliao 028043China College of Physics and Electronic Information Inner Mongolia Minzu UniversityTongliao 028043China

Excitons have significant impacts on the properties of *** exhibit significantly different properties when a direct semiconductor turns in to an indirect one by *** variational method is also found to influence the study of exciton ground state energy and ground state binding energy in Al_(x)Ga_(1−x)As semiconductor spherical quantum *** Al_(x)Ga_(1−x)As is considered to be a direct semiconductor at AI concentration below 0.45,and an indirect one at the concentration above *** regards to the former,the ground state binding energy increases and decreases with AI concentration and eigenfrequency,respectively;however,while the ground state energy increases with AI concentration,it is marginally influenced by *** the other hand,considering the latter,while the ground state binding energy increases with AI concentration,it decreases with eigenfrequency;nevertheless,the ground state energy increases both with AI concentration and ***,for the better practical performance of the semiconductors,the properties of the excitons are suggested to vary by adjusting AI concentration and eigenfrequency.

关键词： exciton effects aluminum gallium arsenide crystal direct band gap semiconductor indirect band gap semiconductor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

W掺杂量和退火温度对W-VO_(2)物相结构及相变性能的影响

引用

材料热处理学报 2024年第2期45卷 44-52页

作者：孙恒辉雷心瑜袁新强蒋鹏张伟张立斋陕西理工大学材料科学与工程学院陕西汉中723000 陕西理工大学矿渣综合利用环保技术国家地方联合工程实验室陕西汉中723000 西安交通大学材料力学行为国家重点实验室陕西西安710049

钨掺杂M相二氧化钒(W-VO_(2)(M))有效降低了VO_(2)金属相(低温单斜相,M)到绝缘体相(高温四方金红石相,R)的可逆相转变温度(T_(c)),显著提高了VO_(2)在智能窗领域的应用价值。然而,W-VO_(2)(M)所表现出的较宽热滞回线宽度(ΔT_(c)>10℃)... 详细信息

钨掺杂M相二氧化钒(W-VO_(2)(M))有效降低了VO_(2)金属相(低温单斜相,M)到绝缘体相(高温四方金红石相,R)的可逆相转变温度(T_(c)),显著提高了VO_(2)在智能窗领域的应用价值。然而,W-VO_(2)(M)所表现出的较宽热滞回线宽度(ΔT_(c)>10℃)对其应用造成了一定的限制。为了解决这一问题,本研究以降低W-VO_(2)(M)的ΔT_(c)为目标,研究了W掺杂量与退火温度对W-VO_(2)物相结构及相变性能的影响。结果表明:随着W掺杂量的增加,W-VO_(2)粉体的T_(c)降低,并且ΔT_(c)较窄;退火温度的升高可以提高W-VO_(2)粉体的结晶度和分散度,但温度过高,会加速VO_(2)晶体结构的破坏,使其在恢复到室温后无法从R相转变为M相;当W掺杂量为6.0 at%,退火温度为700℃时,采用水热-退火两步法制备得到的W-VO_(2)(M)粉体表现出接近室温使用的T_(c)(T_(c)=36.83℃),同时具有较窄的ΔT_(c)(ΔT_(c)=6.63℃)。

关键词： W掺杂水热-退火两步法 W-VO_(2)(M) 智能窗相变性能

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

神经网络算法在切割索侵彻性能预测中的应用研究

引用

火工品 2024年第3期 22-29页

作者：王友刘名兴尹鑫李柠芮庞强宏雷新宇胡强先明春四川航天川南火工技术有限公司四川泸州646000

基于难以通过型面直接准确预测切割索侵彻性能,以及神经网络算法大力发展的现状,本文对神经网络算法在切割索侵彻性能预测领域的应用情况进行了综述。在对常用神经网络计算方法进行分析后,重点对BP神经网络和卷积神经网络算法原理及其... 详细信息

基于难以通过型面直接准确预测切割索侵彻性能,以及神经网络算法大力发展的现状,本文对神经网络算法在切割索侵彻性能预测领域的应用情况进行了综述。在对常用神经网络计算方法进行分析后,重点对BP神经网络和卷积神经网络算法原理及其在切割索性能预测中的应用进行分析梳理和归纳总结,系统性地对两种神经网络算法的数据集处理、网络搭建模型、参数设置和优缺点进行了剖析,为切割索性能优化和智能化预测提供支撑。

关键词：切割索侵彻性能 BP神经网络卷积神经网络

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A performance-based hybrid deep learning model for predicting TBM advance rate using Attention-ResNet-LSTM

引用

Journal of Rock Mechanics and Geotechnical Engineering 2024年第1期16卷 65-80页

作者： Sihao yu Zixin Zhang Shuaifeng Wang xin Huang Qinghua lei Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghaiChina Key Laboratory of Geotechnical and Underground Engineering Ministry of EducationTongji UniversityShanghaiChina Department of Earth Sciences ETH ZürichZürichSwitzerland Department of Earth Sciences Uppsala UniversityUppsalaSweden

The technology of tunnel boring machine(TBM)has been widely applied for underground construction worldwide;however,how to ensure the TBM tunneling process safe and efficient remains a major *** rate is a key parameter of TBM operation and reflects the TBM-ground interaction,for which a reliable prediction helps optimize the TBM ***,we develop a hybrid neural network model,called Attention-ResNet-LSTM,for accurate prediction of the TBM advance rate.A database including geological properties and TBM operational parameters from the Yangtze River Natural Gas Pipeline Project is used to train and test this deep learning *** evolutionary polynomial regression method is adopted to aid the selection of input *** results of numerical exper-iments show that our Attention-ResNet-LSTM model outperforms other commonly-used intelligent models with a lower root mean square error and a lower mean absolute percentage ***,parametric analyses are conducted to explore the effects of the sequence length of historical data and the model architecture on the prediction accuracy.A correlation analysis between the input and output parameters is also implemented to provide guidance for adjusting relevant TBM operational *** performance of our hybrid intelligent model is demonstrated in a case study of TBM tunneling through a complex ground with variable ***,data collected from the Baimang River Tunnel Project in Shenzhen of China are used to further test the generalization of our *** results indicate that,compared to the conventional ResNet-LSTM model,our model has a better predictive capability for scenarios with unknown datasets due to its self-adaptive characteristic.

关键词： Tunnel boring machine(TBM) Advance rate Deep learning Attention-ResNet-LSTM Evolutionary polynomial regression

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Exosomes from umbilical cord mesenchymal stromal cells promote the collagen production of fibroblasts from pelvic organ prolapse

引用

World Journal of Stem Cells 2024年第6期16卷 708-727页

作者： lei-Mei Xu xin-xin yu Ning Zhang Yi-Song Chen Department of Gynecology Obstetrics and Gynecology Hospital of Fudan UniversityShanghai 200011China Department of Gynecology Shanghai Key Laboratory of Female Reproductive Endocrine-related DiseasesShanghai 200011China

BACKGROUND Pelvic organ prolapse(POP)involves pelvic organ herniation into the vagina due to pelvic floor tissue laxity,and vaginal structure is an essential *** POP,the vaginal walls exhibit abnormal collagen distribution and decreased fibroblast levels and *** intricate etiology of POP and the prohibition of trans-vaginal meshes in pelvic reconstruction surgery present challenges in targeted therapy *** umbilical cord mesenchymal stromal cells(hucMSCs)present limitations,but their exosomes(hucMSC-Exo)are promising therapeutic tools for promoting fibroblast proliferation and extracellular matrix *** inflammation in POP group fibroblasts,stimulated primary fibroblast growth,and elevated collagen I(Col1)production in ***-throughput RNA-seq of fibroblasts treated with hucMSC-Exo and miRNA sequencing of hucMSC-Exo revealed that abundant exosomal miRNAs downregulated matrix metalloproteinase 11(MMP11)*** HucMSC-Exo normalized the growth and function of primary fibroblasts from patients with POP by promoting cell growth and Col1 expression in *** miRNAs in hucMSC-Exo targeted and downregulated MMP11 ***-Exo-based therapy may be ideal for safely and effectively treating POP.

关键词： Pelvic organ prolapse Exosomes Fibroblasts Human umbilical cord mesenchymal stromal cells Extracellular matrix Collagen I

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Removal of a pulmonary artery foreign body during pulse ablation in a patient with atrial fibrillation:A case report

引用

世界临床病例杂志 2023年第27期11卷 6587-6591页

作者： Rui Yan xin-yu lei Jun Li Liang-Liang Jia Hai-Xiong Wang Department of Cardiology Shanxi Cardiovascular HospitalTaiyuan 030000Shanxi ProvinceChina The CT Room of the Imaging Department Shanxi Cardiovascular HospitalTaiyuan 030000Shanxi ProvinceChina

BACKGROUND Foreign bodies in the pulmonary circulation have been documented in the literature and are typically caused by interventional ***,reports of pulmonary artery foreign bodies during femoral vein puncture are rare,and there is no description of this complication from the guidewire surface flows into the pulmonary artery during a pulse ablation in a patient with atrial *** SUMMARY We described a case in which a linear foreign body suddenly appeared on fluoroscopy image during pulsed ablation of atrial *** angiography showed that the foreign body was currently lodged in the pulmonary artery but was hemodynamically *** then chose to use an interventional approach to remove the foreign body from the pulmonary *** foreign body was subsequently confirmed to be from the hydrophilic coating of the guidewire *** may be related to the difficulties encountered during the puncture of the femoral *** is a rare and serious complication of femoral vein ***,we reported this case in order to avoid a similar *** Mismatches between interventional devices from different manufacturers used for femoral venipuncture may result in pulmonary artery foreign bodies.

关键词： Femoral vein puncture Atrial fibrillation Guide wire Complication Pulmonary artery foreign body Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Enhanced thermoelectric and mechanical properties of Bi_(0.5)Sb_(1.5)Te_(3) alloy with dispersed yttrium oxide ceramic nanoparticles

引用

Rare Metals 2024年第4期43卷 1758-1768页

作者： Cun-Cheng Li Ming-Wei Zhang Ji-Wu xin lei Wei Wen-yu Zhao School of Materials Science and Engineering Shandong University of TechnologyZibo255000China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore639798Singapore State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

Reducing thermal conductivity while avoiding adverse interfacial reactions during sintering is crucial for improving the thermoelectric performance of Bi_(2)Te_(3)based *** ceramic nanoparticles are good candidates for achieving this *** this study,we designed and prepared a series of p-type Bi_(0.5)Sb_(1.5)Te_(3)nanocomposites decorated with Y_(2)O_(3)ceramic nanoparticles via ball-milling dispersion and spark-plasma *** to the chemical stability of the ceramics,no traces of atomic doping or interfacial reactions were *** measurements revealed that the Y_(2)O_(3)nanoparticles distributed along the grain boundaries acted as energy-dependent carrier-filtering centers to improve the scattering parameter and Seebeck coefficient,contributing to the elevated power factor even with a decreased electrical ***,the incorporated Y_(2)O_(3)nanoparticles and various defect structures they induced effectively strengthened the phonon scattering and suppressed the lattice thermal ***,a peak figure of merit(ZT)of 1.23 at 313 K was achieved for 0.4%Y_(2)O_(3)/Bi_(0.5)Sb_(1.5)Te_(3),which is 13%higher than that of the *** addition,the Vickers hardness of the composite material was 35%higher than that of the *** study demonstrates the effectiveness of ceramic nanoparticles in synergistic ally improving the thermoelectric and mechanical properties,which may be further extended to other thermoelectric systems.

关键词： Bi_(0.5)Sb_(1.5)Te_3 alloy Y_(2)O_(3) ceramic nanoparticles Microstructures Thermoelectric performance Mechanical properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Oligopeptide Self-Assembly:Mechanisms,Stimuli-Responsiveness,and Biomedical Applications

引用

CCS Chemistry 2024年第1期6卷 69-90页

作者： lei Ge Hanyan Xu xin Jiang Jing yu School of Materials Science and Engineering Nanyang Technological UniversitySingapore 637553 Institute for Digital Molecular Analytics and Science Nanyang Technological UniversitySingapore 637553

Oligopeptide self-assembly materials have emerged as a promising class of biomaterials with diverse applications in *** review highlights the recent progress in comprehending the selfassembly mechanisms intrinsic to oligopeptides and their behavior in response to specific *** methodically structuring the amino acid sequence and managing external stimuli such as pH levels,redox conditions,or enzymatic activity,we can exercise unprecedented control over the self-assembly *** controlling the self-assembly process of oligopeptides,various structures with extraordinary versatility can be obtained,including micelles,nanofibers,and coacervate droplets,each possessing modifiable mechanical and chemical ***,these self-assembled constructs demonstrate immense potential within varied biomedical *** stimuli-sensitive nature of oligopeptide assembly materials facilitates timely encapsulation and release of therapeutic cargos,consequently eliciting desired cellular *** approach paves the way for more precise tumor targeting,personalized medicinal treatments,and well-regulated drug *** innate biocompatibility and proficiency in replicating the extracellular matrix(ECM)render them ideally suited for applications such as tissue engineering,wound remediation,and regenerative *** summary,oligopeptide self-assembling materials show tremendous potential as adaptable platforms for cutting-edge biomedical applications,thereby bridging the divide between fundamental research and practical clinical application.

关键词： oligopeptides self-assembly nonequilibrium stimuli-responsive behavior biomedical applications

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of Low-temperature Imidization on Properties and Aggregation Structures of Polyimide Films with Different Rigidity

引用

Chinese Journal of Polymer Science 2024年第8期42卷 1134-1146页

作者： Yan Jia lei Zhai Song Mo Yi Liu Li-xin Liu xin-yu Du Min-Hui He Lin Fan Key Laboratory of Science and Technology on High-tech Polymer Materials Institute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

The traditional high-temperature preparation process of polyimide can cause many problems and limits the wider application in extreme *** important challenge to be solved urgently is the reduction of imidization *** this work,twelve kinds of polyimide films with different chain rigidity were prepared at low temperature of 200℃,in the absence or presence of imidazole used as the *** molecular rigidity and free volume were theoretically calculated,and relationship between structure and properties were systematically *** results show that imidization reaction under low temperatures is significantly affected by the rigidity of molecula r *** rigid structure of polyimide is not conducive to the low-temperature imidization,but this adverse effect can be eliminated by adding catalyst,resulting the notably increased imidization *** optical and thermal properties can be improved to a certain extent for the chemically catalyzed system,resulting in relatively higher heat resistance and thermal *** the mechanical performance could be determined by com plicating factors,greatly different from polyimide films prepa red by high temperature *** investigate aggregation structures of film s,the effect of chain rigidity and catalyst on the stacking or orientation of molecular chains was further *** wo rk can contribute to the understanding of chemically catalyzed imidization that is rarely reported in the existing research,and will provide guidance for the low-temperature preparation of high-performance polyimides.

关键词： Polyimide Imidization Catalyst Structure and properties Aggregation structures

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：