检索结果-南通市图书馆

Chinese Journal of Chemical engineering 2022年第2期35卷 42-48页

作者： Chen Gu Wenqiang Weng cong Lu Peng tan Yao Jiang Qiang Zhang Xiaoqin Liu Linbing Sun State Key Laboratory of Materials-Oriented Chemical engineering Jiangsu National Synergetic Innovation Center for Advanced Material(SICAM)College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Department of Chemistry Washington State UniversityPullmanWashington 99163United States

MXenes have attracted increasing research enthusiasm owing to their unique physical and chemical *** MXenes exhibit exciting potential in cations adsorption due to their unique surface groups,the adsorption capacity is limited by the low specific surface area and undeveloped *** work aims at enhancing the adsorption performance of a well-known MXene,Ti3C2Tx,for methylene blue(MB)by decorating tiny ZIF-8 nanoparticles in the *** the incorporation of ZIF-8,suitable interspace in the layers resulting from the distribution of tiny ZIF-8 *** employing in MB,the adsorption capacity of composites can reach up to 107 mg·g^(-1) while both ZIF-8(3 mg·g^(-1))and Ti_(3)C_(2)Tx(9mg·g^(-1))show nearly no adsorption *** adsorption mechanism was explored,and the good adsorption capacity is caused by the synergistic effect of ZIF-8 and Ti_(3)C_(2)Tx,for neither of them is of suitable interspace or surface groups for MB *** work might pave the way for constructing functional materials based on the introduction of nanoparticles into layered materials for various adsorption applications.

关键词： Ti3C2Tx MXene MOF nanoparticles Adsorption Composites

在线全文

学校读者我要写书评

暂无评论

职业教育发展对实体经济的影响研究

黑龙江高教研究 2025年第1期43卷 147-154页

作者：刘聪阮晓文曹辉南京工业职业技术大学江苏南京210023 江苏大学江苏镇江212013

基于2005一2021年的省际面板数据,采用双向固定效应模型,实证分析了职业教育发展对实体经济的影响效应和作用机制。研究发现,职业教育发展会显著促进实体经济增长,且该结论在替换变量和工具变量估计的稳健性检验下依然成立;异质性分析表... 详细信息

基于2005一2021年的省际面板数据,采用双向固定效应模型,实证分析了职业教育发展对实体经济的影响效应和作用机制。研究发现,职业教育发展会显著促进实体经济增长,且该结论在替换变量和工具变量估计的稳健性检验下依然成立;异质性分析表明,职业教育发展对经济发展程度和教育发展水平欠发达地区的实体经济促进效应更大;机制验证表明,职业教育发展会通过培育匠心劳动者、提高新质生产力和繁荣创业活跃度促进实体经济增长。未来,为更好建设以实体经济为支撑的现代化产业体系,应加快推进中国式职业教育现代化建设,并注重发展策略的精准性。

关键词：职业教育实体经济新质生产力

Investigation of colloidal biogenic sulfur flocculation:Optimization using response surface analysis

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

Journal of environmental Sciences 2016年第4期28卷 227-235页

作者： Fan Chen Ye Yuan Chuan Chen Youkang Zhao Wenbo tan cong Huang Xijun Xu Aijie Wang State Key Laboratory of Urban Water Resource and environment Harbin Institute of Technology Key Laboratory of environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of Sciences

The colloidal properties of biogenic elemental sulfur（S^0）cause solid–liquid separation problems,such as poor settling and membrane *** this study,the separation of S^0 from bulk liquids was performed using *** chloride（PAC）,polyacrylamide（PAM）and microbial flocculant（MBF）were compared to investigate their abilities to flocculate S^0 produced during the treatment of sulfate-containing wastewater.A novel approach with response surface methodology（RSM）was employed to evaluate the effects and interactions of flocculant dose,pH and stirring intensity,on the treatment efficiency in terms of the S^0 flocculation and the supernatant turbidity *** dose optimization results indicated that the S^0 flocculation efficiency decreased in the following order PAC〉MBF〉*** S^0 flocculation conditions were observed at pH 4.73,a stirring speed of 129 r/min and a flocculant dose of 2.42 mg PAC/mg *** optimum flocculation conditions,the S^0f locculation rate reached 97.53%.Confirmation experiments demonstrated that employing PAC for S^0 flocculation is feasible and RSM is an efficient approach for optimizing the process of S^0 *** results provide basic parameters and conditions for recovering sulfur during the treatment of sulfate-laden wastewaters.

关键词： elemental sulfur Flocculation Optimization Response surface methodology (RSM)

Fast and robust strain signal processing for aircraft structural health monitoring

在线全文

学校读者我要写书评

暂无评论

Journal of Automation and Intelligence 2024年第3期3卷 160-168页

作者： cong Wang Xin tan Xiaobin Ren Xuelong Li School of Artificial Intelligence OPtics and ElectroNics(iOPEN)Northwestern Polytechnical UniversityXi’an710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen518063China Shaanxi Neifu Zhongfei Airport Management Co. Ltd.Xi’an710061China Institute of Artificial Intelligence(TeleAI) China Telecom.Beijing100033China

This work elaborates a fast and robust structural health monitoring scheme for copying with aircraft structural *** type of noise in structural strain signals is determined by using a statistical analysis method,which can be regarded as a mixture of Gaussian-like(tiny hairy signals)and impulse-like noise(single signals with anomalous movements in peak and valley areas).Based on this,a least squares filtering method is employed to preprocess strain *** precisely eliminate noise or outliers in strain signals,we propose a novel variational model to generate step signals instead of strain *** judgments are employed to classify the generated *** on the classification labels,whether the aircraft is structurally healthy is accurately *** taking the generated step count vectors and labels as an input,a discriminative neural network is proposed to realize automatic signal *** network output means whether the aircraft structure is healthy or *** results demonstrate that the proposed scheme is effective and efficient,as well as achieves more satisfactory results than other peers.

关键词： Structural health monitoring Signal processing Abnormal judgment Noise analysis Total variation

Indirect approach for predicting cutting force coefficients and power consumption in milling process

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

Advances in Manufacturing 2022年第1期10卷 101-113页

作者： Kai-Ning Shi Ning Liu cong-Le Liu Jun-Xue Ren Shan-Shan Yang Wei Chit tan Key Laboratory of High Performance Manufacturing for Aero engine Department of Mechanical EngineeringMinistry of Industry and Information TechnologyNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China engineering Research Centre of Advanced Manufacturing Technology for Aero engine Department of Mechanical EngineeringMinistry of EducationNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China Virtual Manufacturing Group Smart Manufacturing DivisionAdvanced Remanufacturing and Technology Centre3 Cleantech Loop#01-01CleanTech TwoSingapore 637143Singapore

Accurate energy consumption modeling is an essential prerequisite for sustainable ***,cutting-power-based models have garnered significant attention,as they can provide more comprehensive information regarding the machining energy consumption ***,their implementation is challenging because new cutting force coefficients are typically required to address new workpiece ***,cutting force coefficients are calculated at a high operation cost as a dynamometer must be ***,a novel indirect approach for estimating the cutting force coefficients of a new tool-workpiece pair is proposed *** key idea is to convert the cutting force coefficient calculation problem into an optimization problem,whose solution can be effectively obtained using the proposed simulated annealing ***,the cutting force coefficients for a new tool-workpiece pair can be estimated from a pre-calibrated energy consumption *** experiments performed using different machine tools clearly demonstrate the effectiveness of the developed *** studies with measured cutting force coefficients reveal the decent accuracy of the approach in terms of both energy consumption prediction and instantaneous cutting force *** proposed approach can provide an accurate and reliable estimation of cutting force coefficients for new workpiece materials while avoiding operational or economic problems encountered in traditional force monitoring methods involving ***,this study may significantly advance the development of sustainable manufacturing.

关键词： Sustainable manufacturing Cutting force coefficients energy consumption Machining processSimulated annealing

Formal Modeling and Discovery of Multi-instance Business Processes: A Cloud Resource Management Case Study

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

Ieee/CAA Journal of Automatica Sinica 2022年第12期9卷 2151-2160页

作者： cong Liu Ieee School of Computer Science and Technology Shandong University of TechnologyZibo 255000 College of Computer Science and engineering Shandong University of Science and TechnologyQingdao 266590China

Process discovery, as one of the most challenging process analysis techniques, aims to uncover business process models from event logs. Many process discovery approaches were invented in the past twenty years;however, most of them have difficulties in handling multi-instance sub-processes. To address this challenge, we first introduce a multi-instance business process model(MBPM) to support the modeling of processes with multiple sub-process instantiations. Formal semantics of MBPMs are precisely defined by using multi-instance Petri nets(MPNs)that are an extension of Petri nets with distinguishable ***, a novel process discovery technique is developed to support the discovery of MBPMs from event logs with sub-process multi-instantiation information. In addition, we propose to measure the quality of the discovered MBPMs against the input event logs by transforming an MBPM to a classical Petri net such that existing quality metrics, e.g., fitness and precision, can be *** proposed discovery approach is properly implemented as plugins in the Pro M toolkit. Based on a cloud resource management case study, we compare our approach with the state-of-theart process discovery techniques. The results demonstrate that our approach outperforms existing approaches to discover process models with multi-instance sub-processes.

关键词： Cloud resource management process multi-instance Petri nets(MPNs) multi-instance sub-processes process discovery quality evaluation

electrodeposited transparent PeDOT for inverted perovskite solar cells:improved charge transport and catalytic performances

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第9期40卷 2402-2414页

作者： cong-tan Zhu Ying Yang Fei-Yu Lin Yuan Luo Shu-Peng Ma Liu Zhu Xue-Yi Guo School of Metallurgy and environment Central South UniversityChangsha 410083China First Rare Materials Co. LtdQingyuan 511517China

The acidic, corrosive effect of sodium polystyrene sulfonate(PSS) in poly 3,4-ethylenedioxythiophene:sodium polystyrene sulfonate(PeDOT:PSS) limits the stability of inverted perovskite solar cells(PSCs) based on the ITO/PeDOT:PSS/perovskite/PCBM/BCP/Ag structure. In this work, a poly 3,4-ethylenedioxythiophene(PeDOT) hole transport layer(HTL) with high hole mobility and good catalytic performance was prepared by electrochemical cyclic voltammetry(CV) method for inverted PSCs. By controlling the CV cycles(from 1 to 5 cycles) and eDOT monomer solution concentration(from0.5 to 2.0 mmol·L^(-1)) of electrochemical deposition, the thickness, morphology, optical and electrochemical properties of PeDOT could be accurately adjusted. The optimal photovoltaic performance with current density(J_(sc)) of 22.19 mA·cm^(-2), open circuit voltage(V_(oc)) of 0.94 V, fill factor(FF) of 0.65 and photoelectric conversion efficiency of 13.56% was obtained when deposition of PeDOT with 1 CV cycle and eDOT concentration of 0.5 mmol·L^(-1). At this point, the perovskite showed good crystallization,optimal optical, charge transport and recombination performance, resulting in better V_(oc)and photoelectric conversion efficiency(PCe) compared to the devices with higher CV cycle numbers and 3,4-ethylenedioxythiophene(eDOT) concentration. For comparison with spin-coated PeDOT:PSS, the device with electrodeposited PeDOT showed improved J_(sc)and comparable V_(oc), which may result from its better charge transport and catalytic *** device with spin-coated PeDOT:PSS showed photoelectric conversion efficiency of 12.25%, which was lower than that based on electrodeposited PeDOT(13.56%) with1 CV cycles and 0.5 mmol·L^(-1) eDOT concentration. And the device with electrodeposited PeDOT as HTLs showed more excellent air stability. In ambient air((32 ± 5) ℃ and RH: 70% ± 20%), it still maintained more than 80%of the initial photoelectric conversion efficiency after1000 h. In comparison, the photoe

关键词： electrochemically cyclic voltammetry Inverted perovskite solar cells electrodeposited PeDOT Hole mobility Tafel analysis

Detrital Zircon U-Pb Ages of the Zhaojiazhuang Formation, Middle–South Section, Taihang Mountains, China and their Geological Significance

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(english edition) 2019年第3期93卷 765-768页

作者： LYU Qiqi LUO Shunshe WANG Tongshan SONG Daofu tan cong ZHANG Yan GUAN Yulong School of Geosciences Yangtze UniversityWuhan 430100China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China Petro China Research Institute of Petroleum exploration&Development Beijing 100083China

The sedimentary Zhaojiazhuang Formation overlies the ancient Paleo-proterozoic crystalline basement in the middle-south sections of the Taihang Mountains,*** is a complete stratigraphic sequence with clear *** formation has an angular unconformity with the underlying Paleo-proterozoic Tongyu Formation and a parallel unconformity with the overlying Changzhougou Formation from the Changcheng System,which is widely distributed throughout the W utai-Zhongtiao-T aihang *** Zhen et al.(2007)and Wang Qingchun et al.

关键词： Taihang Mountains Detrital Zircon U-Pb

DeNSITY eSTIMATeS FOR SOLUTIONS OF STOCHASTIC FUNCTIONAL DIFFeReNTIAL eQUATIONS

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2019年第4期39卷 955-970页

作者： Nguyen Tien DUNG Ta cong SON Tran Manh CUONG Nguyen Van tan Trinh Nhu QUYNH Department of Mathematics FPT University Hoa Lac High Tech Park Hanoi Vietnam Department of Mathematics VNU Hanoi University of Science 334 Nguyen Trai Thanh Xuan Hanoi Vietnam Department of Foundation Academy of Cryptography Techniques Hl Chien Thang Thanh Tri Hanoi Vietnam Military Information Technology Institute 17 Hoang Sam Cau Giay Hanoi Vietnam

In this article, we investigate the density of the solution to a class of stochastic functional differential equations by means of Malliavin calculus. Our aim is to provide upper and lower Gaussian estimates for the d... 详细信息

关键词： Stochastic functional differential equations density estimates Malliavin calculus

experimental investigation on surface deformation of soft half plane indented by rigid wedge

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(english edition) 2016年第10期37卷 1349-1360页

作者： Xiaohua tan Yilan KANG e.A.PATTeRSON Tianjin Key Laboratory of High Speed Cutting and Precision Machining Tianjin University of Technology and Education School of engineering University of Liverpool Tianjin Key Laboratory of Modern engineering Mechanics School of Mechanical Engineering Tianjin University

In this work, the mechanical behavior of a block of soft material subject to large deformation from a series of wedge-shaped indenters is evaluated. Data fields acquired from digital image correlation （DIC） are compared with the existing theoretical models. The slope angles of the wedges vary from 5° to 73.5°, and the minimum measure- ment uncertainties of the DIC system are established in advance to define the accuracy. It is concluded that the assumptions underpinning the analytical theory make it difficult to characterize large deformation of soft materials during contact. The strain fields are also obtained from the measured displacement field and verify the previously postulated existence of two deformation sectors, namely, a so-called shrinkage sector symmetric to the loading axis and an expansion sector, which become smaller with the increasing load and decreasing wedge angle.

关键词： contact mechanics wedge indentation large deformation sector division,digital image correlation (DIC)