检索结果-南通市图书馆

Effect of treatment process on consolidation efficiency of fugitive dust cemented by bio-activated cementitious material based on CO2 capture

引用

Science China(technological Sciences) 2016年第8期59卷 1194-1200页

作者： ZHAN QiWei qian ChunXiang School of Materials Science and Engineering Southeast University Jiulonghu Campus Nanjing 211189 China Research Institute of Green Construction Materials Southeast University Jiulonghu Campus Nanjing 211189 China

As a new green and environmental material, bio-activated cementitious material is attracting extensive attention. this study confirmed that the bio-activated cementitious material could mineralize and cement fugitive dust into the cal- cite-consolidation-layer based on CO2 capture and utilization. the results illustrated that treatment processes （non-pressure spraying, pressure spraying, non-pressure blending and pressure blending） had a strong effect on the microstructure and prop- erties of calcite-consolidation-layer. According to the analysis of X-ray diffraction （XRD） and Fourier transform infrared （FtIR）, calcite was prepared by bio-activated cementitious material during the cementation process. Meanwhile, scanning electron microscopy （SEM） and thermogravimetric-differenfial scanning calorimetry （tG-DSC） were adopted to measure the corresponding variation of porous characteristics and calcite content caused by different treatment processes. the results indi- cated that the microstructure of calcite-consolidation-layer from the spraying process had lower porosity and higher content of calcite than from blending processes. In addition, the mechanical properties of calcite-consolidation-layer were also tested. the hardness and compressive strength, which reached 19.5 GPa and 0.6 MPa, respectively, of calcite-consolidation-layer from the pressure spraying process were higher than those from the other three treatment processes. Compared with the non-treatment process, the four treatment processes had superior wind erosion resistance. Under the wind speed of 12 m/s, the mass loss of calcite-consolidation-layer from the pressure spraying process decreased from 2150.2 to 23.8 g/（m^2 h）.

关键词： bio-activated cementitious material treatment process mineralization cementation fugitive dust

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

Study on micro-texture and skid resistance of aggregate during polishing

引用

Frontiers of Structural and Civil Engineering 2017年第3期11卷 346-352页

作者： Zhenyu qian Lingjian MENG National Center for Material Service Safety University of Science and Technology Beijing Beijing 100083 China

the skid resistance performance of pavement is closely related to the micro-texture of pavement aggregate, while there is very few research on the relationship between micro-texture and the skid resistance. In this paper, the optical microscope is used to acquire the surface morphology of three types of aggregates including basalt, limestone and red sandstone respectively, where a total of 12 indicators are developed based on the surface texture information. the polishing effect on aggregate is simulated by Wehner/Schulze （W/S） device, during the polishing procedure, the skid resistance are measured by British Pendulum tester （BPt）. Based on the results of independent t-test and the polishing resistance analysis, it shows that the surface texture of basalt is significantly different between limestone and red sandstone. three indicators including the average roughness （Ra）, the kurtosis of the surface （Sku） and the mean summit curvature （Ssc） are selected to describe the characteristics of aggregate micro-texture based on the correlation analysis. the contribution of micro-texture to the skid resistance can be described with the secondary polynomial regression model by these indicators.

关键词： skid resistance of pavement micro-texture aggregates polishing test

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 oxidation of benzo[a]pyrene by crude enzyme extracts produced during interspecific fungal interaction of trametes versicolor and Phanerochaete chrysosporium

引用

Journal of Environmental Sciences 2012年第9期24卷 1639-1646页

作者： Linbo qian Baoliang Chen Department of Environmental Science Zhejiang University Hangzhou 310058 China. Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Hangzhou 310058 China

the effects of interspecific fungal interactions between trametes versicolor and Phanerochaete chrysosporium on laccase activity and enzymatic oxidation of polycyclic aromatic hydrocarbons （PAHs） were investigated. A deadlock between the two mycelia rather than replacement of one fungus by another was observed on an agar medium. the laccase activity in crude enzyme extracts from interaction zones reached a maximum after a 5-day incubation, which was significantly higher than that from regions of t. versicolor or P. chrysosporium alone. the enhanced induction of laccase activity lasted longer in half nutrition than in normal nutrition. A higher potential to oxidize benzo[a]pyrene by a crude enzyme preparation extracted from the interaction zones was demonstrated. After a 48 hr incubation period, the oxidation of benzo[a]pyrene by crude enzyme extracts from interaction zones reached 26.2%, while only 9.5% of benzo[a]pyrene was oxidized by crude extracts from t. versicolor. the oxidation was promoted by the co-oxidant 2,2＇-azinobis-3- ethylbenzthiazoline-6-sulphonate diammonium salt （ABtS）. these findings indicate that the application of co-culturing of white-rot fungi in bioremediation is a potential ameliorating technique for the restoration of PAH-contaminated soil.

关键词： white-rot fungus interspecific interaction laccase activity benzo[a]pyrene oxidation

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

Neural-Network-Based terminal Sliding Mode Control for Frequency Stabilization of Renewable Power Systems

引用

IEEE/CAA Journal of Automatica Sinica 2018年第3期5卷 706-717页

作者： Dianwei qian Guoliang Fan School of Control and Computer Engineering North China Electric Power University Beijing 102206 China Institute of Automation Chinese Academy of Sciences Beijing 100190 China

this paper addresses a terminal sliding mode control(t-SMC) method for load frequency control(LFC) in renewable power systems with generation rate constraints(GRC).A two-area interconnected power system with wind turbines is taken into account for simulation studies. the terminal sliding mode controllers are assigned in each area to achieve the LFC goal. the increasing complexity of the nonlinear power system aggravates the effects of system uncertainties. Radial basis function neural networks(RBF NNs) are designed to approximate the entire uncertainties. the terminal sliding mode controllers and the RBF NNs work in parallel to solve the LFC problem for the renewable power system. Some simulation results illustrate the feasibility and validity of the presented scheme.

关键词： Generation rate constraint(GRC) load frequency control(LFC) radial basis function neural networks(RBF NNs) renewable power system terminal sliding mode control(t-SMC)

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

Analysis Framework for the Low Carbon Eco-City Regulatory Plan Administration System: the Case Study on the Planning of Eco-City of taihu New City, Wuxi, China

引用

China City Planning Review 2016年第3期25卷 25-33页

作者： Stanley C t yip qian Fang Centre of Urban Planning & Design/ School of Urban Planning & Design Peking University

Chinese cities need the appropriate administration system and governance model to support the implementation of low carbon eco-city projects, and to effectively scale up this urban development model across the nation. Currently, local planning authorities are piloting the implementation of these low carbon eco-city projects through the statutory Regulatory Plans system(the local district zoning plans system). However, the focus has been put primarily on the use of the relevant technologies and the control through design approval. there is a lack on research and study on the establishment of an effective planning administration and governance environment for the subsequent promulgation of this development model. this situation is affecting the speed in the scaling up of the implementation of low carbon ecological projects in Chinese cities. this paper argues that while technology applications and design issues are important factors, attention shall be put to setting up innovative planning administration and governance models for the statutory Regulatory Plan to facilitate the implementation of the low carbon eco-city projects. this paper puts forth an analysis framework on the administration and governance system which includes 4 governance components:(1) Administration platform and local capacity;(2) Planning conditions and approval process;(3) External public policy context;(4) Developers involvement and participation. A case study was undertaken based on taihu New City eco-city project located at Wuxi, China. Based on research and analysis of the project implementation process, the study examines the challenges faced by the local planning offi cials and development companies during the implementation stage of the low carbon eco-city project. Finally this paper puts forth initial recommendations that could lead to further research in this important area.

关键词： low carbon ecological city district eco-cities regulatory plans low carbon city governance

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 LIMIt LAW FOR FUNCtIONALS OF MULtIPLE INDEPENDENt FRACtIONAL BROWNIAN MOtIONS

引用

Acta Mathematica Scientia 2020年第3期40卷 734-754页

作者： qian yU School of Statistics East China Normal UniversityShanghai 200241China

Let B={B^H(t)}t≥0 be a d-dimensional fractional Brownian motion with Hurst parameter H∈(0,1).Consider the functionals of k independent d-dimensional fractional Brownian motions 1/√n∫0^ent1⋯∫0^entk f(B^H,1(s1)+⋯+B^H,k(sk))ds1⋯dsk,where the Hurst index H=k/*** the method of moments,we prove the limit law and extending a result by Xu\cite{xu}of the case k=*** can also be regarded as a fractional generalization of Biane\cite{biane}in the case of Brownian motion.

关键词： Limit theorem fractional Brownian motion method of moments chaining argument

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

Beyond city expansion:multi-scale environmental impacts of urban megaregion formation in China

引用

National Science Review 2022年第1期9卷 79-91页

作者： Weiqi Zhou Wenjuan yu yuguo qian Lijian Han Steward t.A.Pickett Jing Wang Weifeng Li Zhiyun Ouyang State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences College of Resources and Environment University of Chinese Academy of Sciences Cary Institute of Ecosystem Studies Beijing Urban Ecosystem Research Station Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

Environmental degradation caused by rapid urbanization is a pressing global ***,little is known about how urban changes operate and affect environments across multiple *** on China,we found urbanization was indeed massive from 2000 to 2015,but it was also very uneven,exhibiting high internal city *** areas in China as a whole became less green,warmer,and had exacerbated PM2.5 ***,environmental impacts differed in newly developed versus older areas of *** impacts were prominent in newly urbanized areas,while old urban areas generally showed improved environmental *** addition,regional environmental issues are emerging as cities expand,connect and interact to form urban *** turn urbanization into an opportunity for,rather than an obstacle to,sustainable development,we must move beyond documenting urban expansion to understand the environmental consequences of both internal city dynamics and the formation of urban megaregions.

关键词： urbanization urban and regional sustainability landscape change air pollution urban heat island

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

tunable perpendicular anisotropic magnetoresistance in CoO/Co/Pt heterostructures

引用

Rare Metals 2023年第2期42卷 579-584页

作者： qian-qian Liu Guang yang Jing-yan Zhang Guo-Nan Feng Chun Feng qian Zhan Ming-Hua Li Guang-Hua yu Department of Materials Physics and Chemistry University of Science and Technology BeijingBeijing100083China

transport properties of magnetron-sputtered CoO/Co/Pt heterostructures were investigated by physical property measurement *** types of magnetoresistance are observed in the heterostructures,including isotropic anisotropic magnetoresistance(AMR),AMR with geometric size effect,and interfacial effect.A reversal in sign of perpendicular AMR is found in the film CoO(3 nm)/Co(3 nm)/Pt(3 nm)compared to the film CoO(3 nm)/Co(3 nm)/CoO(3 nm),which is associated with ***,perpendicular AMR is tunable in the films CoO(3 nm)/Co(3 nm)/CoO(t)/Pt(3 nm)and CoO(3 nm)/Co(3 nm)/Pt(t)/CoO(3 nm)at will,with either positive or negative value,by varying the inserting layer *** electronic structure information of the samples was measured by X-ray photoelectron spectroscopy(XPS).the spin-related transport and XPS results manifest that magnetic proximity effect,surface scattering,together with oxygen migration contribute to the tunable function of Pt.

关键词： Perpendicular anisotropic magnetoresistance Magnetic proximity effect Surface scattering X-ray photoelectron spectroscopy

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 rice geranylgeranyl reductase is essential for chloroplast development

引用

Journal of Integrative Agriculture 2021年第10期20卷 2592-2600页

作者： LIU Xi yI Xin yANG yan-rong HUANG qian-qian Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection/Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake Huaiyin Normal UniversityHuai’an 223300P.R.China

Chloroplasts are essential for plant photosynthesis and *** genes have been identified that regulate plant chloroplast ***,it is not known at a molecular level how these genes regulate chloroplast *** this study,we isolated a mutant ygl2(yellow-green leaf2)that exhibited a pigment-defective ***2 encodes a geranylgeranyl reductase,and in mutant ygl2,there was a single base change(t1361G)located in the third exon of yGL2 that resulted in a missense mutation(L454R)in the encoded *** electron microscopy revealed that chloroplast development was impaired in the ygl2 *** expression levels of plastid-encoded genes were significantly altered in the ygl2 ***,in a yeast two-hybrid assay,we found that yGL2 interacted with the RNA editing factor MORF8.

关键词： rice(Oryza sativa L.) chloroplast yGL2 geranylgeranyl reductase

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

Novel Adaptive Memory Event-triggered-Based Fuzzy Robust Control for Nonlinear Networked Systems via the Differential Evolution Algorithm

引用

IEEE/CAA Journal of Automatica Sinica 2024年第8期11卷 1836-1848页

作者： Wei qian yanmin Wu Bo Shen School of Electrical Engineering and Automation Henan Polytechnic UniversityJiaozuo 454000China College of Information Science and technology Donghua UniversityShanghai 201620China

this article mainly investigates the fuzzy optimization robust control issue for nonlinear networked systems characterized by the interval type-2(It2)fuzzy technique under a differential evolution *** provide a more reasonable utilization of the constrained communication channel,a novel adaptive memory event-triggered(AMEt)mechanism is developed,where two event-triggered thresholds can be dynamically adjusted in the light of the current system information and the transmitted historical *** conditions with less conservative design of the fuzzy imperfect premise matching(IPM)controller are presented by introducing the Wirtinger-based integral inequality,the information of membership functions(MFs)and slack ***,under the IPM policy,a new MFs intelligent optimization technique that takes advantage of the differential evolution algorithm is first provided for It2 takagiSugeno(t-S)fuzzy systems to update the fuzzy controller MFs in real-time and achieve a better system control ***,simulation results demonstrate that the proposed control scheme can obtain better system performance in the case of using fewer communication resources.

关键词： Adaptive memory event-triggered(AMEt) differential evolution algorithm fuzzy optimization robust control interval type-2(It2)fuzzy technique.

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：