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消除γ能谱中^(232)Th对^(40)K的干扰 被引量:13
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作者 王崇杰 张爱莲 《核技术》 CAS CSCD 北大核心 2003年第11期831-833,共3页
介绍了利用232Th、40K混合体标准源直接消除γ能谱中232Th对40K干扰的一种方法,并与拟合效率刻度曲线法进行了比较,对于232Th两者分析结果相对误差小于3%,对于40K则小于1%。该方法的优点是:在不需要对γ谱仪系统进行效率刻度的情况下... 介绍了利用232Th、40K混合体标准源直接消除γ能谱中232Th对40K干扰的一种方法,并与拟合效率刻度曲线法进行了比较,对于232Th两者分析结果相对误差小于3%,对于40K则小于1%。该方法的优点是:在不需要对γ谱仪系统进行效率刻度的情况下,即可求出系统对40K的绝对探测效率,并能消除232Th对40K的干扰。 展开更多
关键词 γ能谱分析 效率刻度 曲线拟合 体标准源 核素干扰
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Development of Ocean Energy Test Field in China
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作者 Chenhua Ni 《Journal of Shipping and Ocean Engineering》 2015年第1期44-49,共6页
The mission of the test field is to provide technical support to associates. The paper present the development of OE (ocean energy) field in China and outline the new technologies and best practice, resources condit... The mission of the test field is to provide technical support to associates. The paper present the development of OE (ocean energy) field in China and outline the new technologies and best practice, resources conditions, construction targets, generation device testing and standard system. The main purpose is to improve the level of China's ocean energy development. The Chinese ocean energy test field, which was started in 2008, involved a development divided in three phases (the overall design, construction, demonstration). The methodology followed in the individual phases is described, and the standardization of testing wave and tidal current energy devices is introduced. The research revealed the development and the shortage of ocean energy technology in China. 展开更多
关键词 Ocean energy test field device testing standardization.
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Research on the Development of Energy Management System Standards System
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作者 李燕 王赓 朱春雁 《China Standardization》 2014年第2期58-61,共4页
Energy Management System (EnMS), benefiting enterprises with energy conservation through the PDCA cycle, has been widely valued and applied by domestic and overseas enterprises. Based on the experience on the constr... Energy Management System (EnMS), benefiting enterprises with energy conservation through the PDCA cycle, has been widely valued and applied by domestic and overseas enterprises. Based on the experience on the construction and implementation of energy management system, the paper systematically analyzes the construction ideas and development requirements of EnMS standards system, aiming to broaden/he coverage of EnMS and its technical indicator system, strengthen the systematicness and comprehensiveness and provide standardized tools and methods for all users. 展开更多
关键词 energy management system standards system
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Study on Metallurgical Energy-saving Standards System
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作者 仇金辉 《China Standardization》 2013年第5期74-77,共4页
The paper studies the metallurgical energy saving standards system, indicates the current siltutinon of standards and proposes a plan for the further standardizalion work. so as to promote new energy saving technologi... The paper studies the metallurgical energy saving standards system, indicates the current siltutinon of standards and proposes a plan for the further standardizalion work. so as to promote new energy saving technologies and application of new process to boost energy eonservation and emission reduction. 展开更多
关键词 METALLURGY energy conservation STANDARDS
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Construction of Agricultural Circular Economy and Standard System in China
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作者 Hong Denghua,Zhang Shisheng,Zheng Yuyan,Tao Xueming Yu Xiaoying Engineer,Anhui Institute of Standardization Engineer, Deputy Director of Standards Research Center,Anhui Institute of Standardization, Engineer,Anhui Institute of Standardization, Engineer,Anhui Institute of Standardization, Engineer,Anhui Institute of Standardization, 《China Standardization》 2010年第5期24-30,共7页
Under the new situation of advocating the development of circular economy and low-carbon economy in the world, the agriculture is facing all the challenges to ensure food safety, dealing with climate change, promote e... Under the new situation of advocating the development of circular economy and low-carbon economy in the world, the agriculture is facing all the challenges to ensure food safety, dealing with climate change, promote energy conservation and pollution reduction, protect resources and environment, and increase the income of farmers. Moreover, developing circular agriculture is in the direction that the international challenges can be dealt with and the development of agriculture in China can be accelerated. This paper has reported current situation of agricultural circular economy, keep energy conservation and pollution reduction, and analyzed the basic thought of developing agricultural circular economy. 展开更多
关键词 agricultural circular economy energy conservation agricultural standard system THOUGHT
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Standards System and Evaluation Indicators System for Environmental Protection Products
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作者 Huang Jin Lin Ling Wang Xiuteng 《China Standardization》 2010年第6期17-25,共9页
Environmental protection products and equipment are important substance basis and insurance which provide supporting for to the realization of the strategic objective of reduced energy use and emissions while improvin... Environmental protection products and equipment are important substance basis and insurance which provide supporting for to the realization of the strategic objective of reduced energy use and emissions while improving the resource economy & environmental kindly society building, as well as the sustainable development economy and environment in a sustainable fashion. Here, the framework of the standards system and evaluation indicators system for environmental protection products are described based on the present deficiencies in independent innovation, lower levels of standardization, and poor operating effectiveness of such equipment in China with a goal of forcing the development of standardization, seriation and currency used in the environmental protection industry. The results presented here should serve as a reference for the promotion of quality and effectiveness in environmental protection products and equipments. 展开更多
关键词 Environmental Protection Products Standards System Evaluation Indicators System
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A reconfigurable active-G_m-RC filter formultistandard wireless receivers
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作者 樊祥宁 Bao Kuan +2 位作者 Tang Li Liu Junbo Gu Chengjie 《High Technology Letters》 EI CAS 2015年第2期119-126,共8页
A 4th-order low-pass filter (LPF) based on active-Gm-RC structure for multi-standard system application is presented in this paper. The performances of LPF are controlled by a 1-bit control- voltage, and the cut-off... A 4th-order low-pass filter (LPF) based on active-Gm-RC structure for multi-standard system application is presented in this paper. The performances of LPF are controlled by a 1-bit control- voltage, and the cut-off frequency, channel selectivity, and linearity of the proposed filter can be reconfigured accordingly. In order to improve the accuracy of the cut-off frequency, a binary-weigh- ted switched-capacitor array is employed as the auto-tuning circuits to calibrate the RC-time con- stant. Fabricated in TSMC 0. 18μm RF CMOS process, the proposed LPF achieves a measured cutoff frequency of 1.95 and 12.3MHz for WCDMA and GPS/Galileo application with a bandwidth de viation less than 4%. The measured l dB compression points are -3.0dBm and -5.1 dBm respectively for different modes. The core circuit of LPF consumes l mW and 1.6mW for WCDMA and GPS/Galileo respectively. And the proposed LPF occupies an area of 0.78ram2. 展开更多
关键词 low pass filter (LPF) MULTI-STANDARD active-Gm-RC AUTO-TUNING WCDMA GPS GALILEO RECONFIGURABILITY
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