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Thinking about Value Realization of Ecological Products under the Background of Urban-rural Integration in Chengdu“Western Control”Area
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作者 ZHANG Xuequan ZHANG Yi 《Journal of Landscape Research》 2023年第2期59-62,共4页
Chengdu's development strategy of“western control”has laid a solid ecological background for 8 western districts,cities and counties and cultivated good ecological resources.The integrated urban-rural developmen... Chengdu's development strategy of“western control”has laid a solid ecological background for 8 western districts,cities and counties and cultivated good ecological resources.The integrated urban-rural development in the new era will realize the balanced development of urban and rural areas and give full play to the value of rural ecological resources through the“powerful combination”of urban and rural areas.To realize the urban-rural integration and high-quality rural development in Chengdu“western control”area,it is necessary to enhance the awareness of ecological resources and ecological products,and carry out unified planning of ecological infrastructure,ecological material products and ecological service products in the whole“western control”area.Meantime,ecological restoration must be carried out scientifically,and scene design for value transformation of ecological products should be implemented innovatively. 展开更多
关键词 Western control Urban-rural integration Ecological products Ecological value transformation
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Audio Zero-Watermark Scheme Based on Discrete Cosine Transform-Discrete Wavelet TransformSingular Value Decomposition 被引量:7
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作者 Min Lei Yu Yang +2 位作者 XiaoMing Liu MingZhi Cheng Rui Wang 《China Communications》 SCIE CSCD 2016年第7期117-121,共5页
Traditional watermark embedding schemes inevitably modify the data in a host audio signal and lead to the degradation of the host signal.In this paper,a novel audio zero-watermarking algorithm based on discrete wavele... Traditional watermark embedding schemes inevitably modify the data in a host audio signal and lead to the degradation of the host signal.In this paper,a novel audio zero-watermarking algorithm based on discrete wavelet transform(DWT),discrete cosine transform(DCT),and singular value decomposition(SVD) is presented.The watermark is registered by performing SVD on the coefficients generated through DWT and DCT to avoid data modification and host signal degradation.Simulation results show that the proposed zero-watermarking algorithm is strongly robust to common signal processing methods such as requantization,MP3 compression,resampling,addition of white Gaussian noise,and low-pass filtering. 展开更多
关键词 zero-watermark discrete wavelet transform discrete cosine transform singular value decomposition
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Electrochemical performance of nano-scale β-Ni(OH)_2 prepared at different transformations of pH value
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作者 赵力 张利军 +1 位作者 韩喜江 张翠芬 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2008年第2期160-163,共4页
The influence of transforming pH values on the electrochemical performance of nano-scale Ni (OH)2 was analyzed. The measurement results of XRD indicate that the nano-scale Ni (OH) 2 prepared at different transform... The influence of transforming pH values on the electrochemical performance of nano-scale Ni (OH)2 was analyzed. The measurement results of XRD indicate that the nano-scale Ni (OH) 2 prepared at different transformations of pH value is β ( Ⅱ )-phase with different crystal lattice parameters. Cyclic voltammograms (CV) and electrochemical impedance spectroscopy(EIS) measurement results show that transformations of pH value affect the proton diffusion coefficient (D) and charge-transfer resistance (Re,) of the material. The simulation of.cell experiment shows that the sample prepared at a pH of 10. 1 exhibits the maximum specific capacity (327.8 mAh/g) and higher discharge platform, the discharge performance of electrodes depends on both D and Rct, so the kinetics characteristics that electrodes reaction is controlled by both mass-transfer step and charge- transfer step are put forward. 展开更多
关键词 nano-material Ni(OH)2 ELECTROCHEMICAL transformations of pH value
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Theoretical Research,Practice Exploration and Policy Suggestions on Scenescape Development and Ecological Value Transformation in Chengdu’s Park City Construction
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作者 Wei Liangyi Xu Qi 《Contemporary Social Sciences》 2021年第4期53-66,共14页
The“Park City”concept presents a new,urban development model that can be used as a guide for planning the growth of a city.Advancing the transformation of Chengdu into a park city is an important and unique strategi... The“Park City”concept presents a new,urban development model that can be used as a guide for planning the growth of a city.Advancing the transformation of Chengdu into a park city is an important and unique strategic option for maintaining and strengthening the Chengdu-Chongqing economic circle.The construction of a park city in Chengdu has many potentially positive and favorable outcomes,including maintaining natural ecosystems while improving biodiversity,livability,and enhancing the city’s historical and cultural heritage,all while establishing Chengdu as a national leader for this new urban development model.In recent years,park city scenescape modeling and the resulting ecological value transformations have been analyzed through theory,mechanism designs,and limited practice,but throughout the explorations on scenescape building and ecological value transformations,the actual construction of a park city is still facing many problems.This article argues that Chengdu should take lessons from the advanced experience in urban ecological construction efforts of other cities,both in China and overseas,focusing on sustained scenescape building,theoretical research in ecological value transformations,establishing meaningful and compatible interaction mechanisms between ecological value transformations and capital markets,improving the levels of planning and designing needed for scenescape building,establishing innovative scenescape building and ecological value transformations management systems and mechanisms,and cultivating park city scenescape brands.Related and detailed scenescape building and ecological value transformation measurement and policy suggestions are also provided in this article. 展开更多
关键词 Park City scenescape building ecological value transformations
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Defect Recognition in Thermosonic Imaging 被引量:4
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作者 CHEN Dapeng WU Naiming ZHANG Zheng 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2012年第4期657-662,共6页
This work is aimed at developing an effective method for defect recognition in thermosonic imaging.The heat mechanism of thermosonic imaging is introduced,and the problem for defect recognition is discussed.For this p... This work is aimed at developing an effective method for defect recognition in thermosonic imaging.The heat mechanism of thermosonic imaging is introduced,and the problem for defect recognition is discussed.For this purpose,defect existing in the inner wall of a metal pipeline specimen and defects embedded in a carbon fiber reinforced plastic(CFRP) laminate are tested.The experimental data are processed by pulse phase thermography(PPT) method to show the phase images at different frequencies,and the characteristic of phase angle vs frequency curve of thermal anomalies and sound area is analyzed.A binary image,which is based on the characteristic value of defects,is obtained by a new recognition algorithm to show the defects.Results demonstrate good defect recognition performance for thermosonic imaging,and the reliability of this technique can be improved by the method. 展开更多
关键词 thermosonic imaging defect recognition Fourier transforms characteristic value carbon fiber reinforced plastic
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SOLVABILITY AND WELL-POSEDNESS OF HIGHERORDER ABSTRACT CAUCHY PROBLEMS 被引量:1
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作者 郑权 《Science China Mathematics》 SCIE 1991年第2期147-156,共10页
We consider the higher-order Cauchy problem (ACP_n) x^(n)(t)=sum from i=0 to n-1 B_ix^(i)(t)_1x^(i)(0)=x_i for 0≤i≤n-1,where B_i(0≤i≤n-1) are closed linear operators on a Banach space X such that D=∩ i=0 n-1 D(B_... We consider the higher-order Cauchy problem (ACP_n) x^(n)(t)=sum from i=0 to n-1 B_ix^(i)(t)_1x^(i)(0)=x_i for 0≤i≤n-1,where B_i(0≤i≤n-1) are closed linear operators on a Banach space X such that D=∩ i=0 n-1 D(B_i)is dense in X. It is well known that the solvability and the well-posedness of (ACP_n)were studied only in some special cases, such as D(B_(n-1))?D(B_i) for 0≤i≤n-2 by F. Neu-brander and a factoring case by J. T. Sandefur. In this paper, by using some new results ofvector valued Laplace transforms given by W. Arenddt, we obtain some characterizations ofthe solvability and some sufficiency conditions of the well-posedness for general (ACP_n),which generalize F. Neubrander's results and the famous results for (ACP_1) 展开更多
关键词 higher-order abstract Cauchy problems SOLVABILITY WELL-POSEDNESS C_0 semigroup vector valued Laplace transform.
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