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单原子光催化剂的合成、表征及在环境与能源领域的应用 预览
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作者 李惠惠 张圆正 +2 位作者 代云容 于艳新 殷立峰 《材料导报》 EI CAS CSCD 北大核心 2020年第3期56-68,共13页
绿色清洁的光催化技术可降解污染物、生产能源,是解决环境与能源问题的重要手段,但限于光催化材料成本及效率方面,难以实现大规模应用。近年来单原子光催化剂的诞生和发展为这一领域注入了新的活力,其合成、表征及应用的相关研究成为材... 绿色清洁的光催化技术可降解污染物、生产能源,是解决环境与能源问题的重要手段,但限于光催化材料成本及效率方面,难以实现大规模应用。近年来单原子光催化剂的诞生和发展为这一领域注入了新的活力,其合成、表征及应用的相关研究成为材料、化学、环境、能源等诸多领域的热点。与传统负载型光催化剂相比,单原子光催化剂表面的金属粒子的分散度达到原子尺寸,可呈现更高的催化活性和选择性,但对合成策略、表征技术和应用途径提出了更高的挑战:合成方面的主要障碍在于金属单原子的高表面能导致合成过程中的失稳团聚而丧失其单原子形态;传统的表征技术也缺乏对单原子形貌、结构及化学环境的解析能力;目前对单原子光催化剂的应用研究多为传统研究领域的延伸,未能充分利用单原子的功能特性。这些问题成为制约其发展的关键,也是该领域的研究热点。国内外学者在单原子光催化材料合成、表征和应用领域做出了巨大努力,并取得了丰硕成果:(1)合成方面,针对单原子表面能高、易团聚的问题,改进了液相合成法、原子层沉积法等传统合成策略,引进了新的高温裂解、火焰喷雾、静电自组装等技术;(2)表征方面,先进的原子尺度分析技术如球差校正高分辨透射电镜(HAADF-STEM)、X射线吸收精细结构谱(XAFs)等以及密度泛函理论(DFT)的发展则有助于深入理解孤立金属单原子形态及化学结构;(3)单原子光催化剂目前已被成功应用于光解水制氢、光催化CO2还原、环境污染物降解以及合成氨等领域,获得了长足的发展。上述成果推进了光催化材料及催化理论的研究向原子级别深入,使其进一步贴近实用化。本文综述了近年来单原子光催化剂的合成方法、表征技术以及在环境和能源领域的应用情况。同时,总结了目前单原子光催化材料研究中存在的 展开更多
关键词 单原子 光催化剂 环境 污染物降解 能源
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Experimental study of near-bed concentration and sediment verticalmixing parameter for vertical concentration distribution in the surfzone 预览
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作者 Yang Zhang Zhili Zou +1 位作者 Wushan Xue Dapeng Sun 《国际泥沙研究:英文版》 SCIE 2020年第1期27-41,共15页
Two formulae for the near-bed concentration(Ca)and the sediment vertical mixing parameter(m)are established based on a large scale wave flume experiment.The advantage of the new formulae is that the turbulent kinetic ... Two formulae for the near-bed concentration(Ca)and the sediment vertical mixing parameter(m)are established based on a large scale wave flume experiment.The advantage of the new formulae is that the turbulent kinetic energy induced by wave breaking can be taken into account;the formula for Ca is in terms of the near-bed,time-averaged turbulent kinetic energy,and the formula for m is in terms of depth-and time-averaged turbulent kinetic energy.A new expression for suspended sediment load also is established by depth integration of the vertical distribution of the suspended sediment concentration obtained on basis of the new formulae.Equation validation is done by comparing the predicted Ca and m to measurements for different types of waves(regular wave,wave group,and irregular wave),and good agreement is found.The advantages of the proposed formulae over previous formulae also are discussed. 展开更多
关键词 Near-bed concentration Sediment vertical mixing parameter Turbulent kinetic energy Surf zone Wave type
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Conceptual Issues in the Qualification of Intelligent Buildings 预览
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作者 Ogwu Ikechukwu Okonkwo Moses 《能源效率(英文)》 2019年第2期52-63,共12页
The reality of global warming must have been settled by now while the incidence of same has in very recent times adopted unprecedented dimensions. The global community continues to look for ways to combat the impact o... The reality of global warming must have been settled by now while the incidence of same has in very recent times adopted unprecedented dimensions. The global community continues to look for ways to combat the impact of climate change and technology is looked upon to deliver the innovations that would ensure a better tomorrow today. Rapid advancement of Information Technology (IT), is now transforming the way we create and interact with the built environment with the notion of Intelligent Buildings (IBs) underscoring its main features. However, these IBs utilize systems that require energy, and fossil fuels are currently the world’s primary energy sources;they can also irreparably harm the environment, exacerbating climate change. What then is the true essence of IBs? This paper, through review of existing literature, attempts to explore some issues associated with the conceptualization of IBs, highlighting how they are similar with other notional options that deliver the same benefits but without the needed IT systems or the energy required in running them. It also discusses the need to focus on less energy demanding and management approaches at design or occupancy of buildings as a way to reduce the demand and thus consumption of fossil fuels across the world. 展开更多
关键词 Technology Climate Change ENERGY ENERGY Efficiency Building ENERGY Assessment HVAC FACADE Systems PASSIVE Design Smart Materials Intelligent Buildings
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Renewable Energy:Wind Turbines,Solar Cells,Small Hydroelectric Plants,Biomass,and Geothermal Sources of Energy 预览
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作者 Natasa A. Kablar 《能源与动力工程:英文版》 2019年第4期162-172,共11页
In this paper,we present five basic types of renewable energy sources,namely:wind turbines,solar cells,small hydroelectric plants,biomass,and geothermal sources of energy.Wind turbines transform energy of wind into el... In this paper,we present five basic types of renewable energy sources,namely:wind turbines,solar cells,small hydroelectric plants,biomass,and geothermal sources of energy.Wind turbines transform energy of wind into electrical energy,solar cells transform energy of sun into electric energy,hydroelectric plants transform energy of water into electric energy,devices or machines can be constructed to transform energy of biomass into heat energy,and geothermal energy into some form of energy.In this paper we present basic information and reasons why there is need today to use these forms of energy—called green energies,we present how these devices or machines function,and we propose for future work design of typical devices or machines that will satisfy basic functional needs. 展开更多
关键词 Wind ENERGY solar ENERGY water ENERGY BIOMASS ENERGY GEOTHERMAL ENERGY RENEWABLE ENERGIES electrical power generation of electricity
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世界能源发展趋势与中国能源未来发展方向 预览
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作者 张所续 马伯永 《中国国土资源经济》 2019年第10期20-27,33共9页
当前,全球能源将与经济出现脱钩,化石能源仍是世界的主导燃料,新兴经济体引领全球能源消费增长,可再生能源成为全球应对气候变化的重大举措,电力领域迎来重大转型,核电有望成为最具竞争力的电力脱碳能源,煤炭的核心地位逐步降低,技术创... 当前,全球能源将与经济出现脱钩,化石能源仍是世界的主导燃料,新兴经济体引领全球能源消费增长,可再生能源成为全球应对气候变化的重大举措,电力领域迎来重大转型,核电有望成为最具竞争力的电力脱碳能源,煤炭的核心地位逐步降低,技术创新打破可再生能源的制约,可再生能源将重塑地缘政治格局。面对世界能源发展趋势,中国必须以全球思维应对能源领域的挑战,依托“一带一路”建设,扩大和深化国际能源合作;加强能源领域科技创新,引领全球能源转型;立足国内挖潜,构建多元化的能源储备体系;打造具有国际竞争力的“核心企业”,拓展上中下游产业链。 展开更多
关键词 能源 可再生能源 能源安全 能源转型
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能源高质量发展的财税政策研究 预览
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作者 何强 高天慧 《未来与发展》 2019年第10期71-74,共4页
本文通过描述能源高质量发展的背景、内涵,剖析能源财税政策现状并提出其现存的主要问题,展示财税政策为促进能源高质量发展在政策制定、发展、改革过程中发挥的作用。旨在改善财税政策,寻求新的能源高质量发展的方案以促进财税政策更... 本文通过描述能源高质量发展的背景、内涵,剖析能源财税政策现状并提出其现存的主要问题,展示财税政策为促进能源高质量发展在政策制定、发展、改革过程中发挥的作用。旨在改善财税政策,寻求新的能源高质量发展的方案以促进财税政策更好地为能源高质量发展发挥作用。 展开更多
关键词 能源 能源高质量发展 可再生能源 不可再生能源 财税政策
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Energy Electromagnetic Force Equivalence, <i>E = F<sub>e</sub>x r</i> 预览
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作者 Greg Poole 《高能物理(英文)》 2019年第4期1057-1062,共6页
By combing the mass energy equivalence formula, E=mc2, with the speed of light and gravity formula, , a new equation for energy is derived. The Energy Electromagnetic Force Equivalence is used to explain the rotationa... By combing the mass energy equivalence formula, E=mc2, with the speed of light and gravity formula, , a new equation for energy is derived. The Energy Electromagnetic Force Equivalence is used to explain the rotational torque of the stars, planets, and galaxy. A greater understanding of the universe is achieved with a simple mathematical expression. Nuclear energy from the Sun is converted to an electrical force which pervades the universe and gives the bodies within it, rotational motion. It is a macro equation for action at a distance. The equation suggests that nuclear energy and electromagnetic force is one of the most basic equations of the universe. It is proposed that there is only one all-encompassing force of the universe, the electromagnetic force. 展开更多
关键词 c2 CENTRIPETAL Acceleration ENERGY Force Mass ENERGY EQUIVALENCE Light
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Barriers related to the deployment of renewable energies in Cameroon and ways to strengthen policies 预览
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作者 Jean Engo 《资源与环境经济(英文)》 2019年第1期29-38,共10页
Cameroon’s current vision is to reduce greenhouse gas emissions by 32% by 2035. To this end, there is no doubt that renewable energies should play the leading role in achieving this goal. This paper applied the fishb... Cameroon’s current vision is to reduce greenhouse gas emissions by 32% by 2035. To this end, there is no doubt that renewable energies should play the leading role in achieving this goal. This paper applied the fishbone diagram as part of strengths, weaknesses, opportunities, and threats analysis related to the deployment of renewable energies in Cameroon. The results showed that the share of renewable energy in the country’s energy mix decreased from 98.9 to 76.11% in 2000 and 2015, respectively. This is due to the decline in hydroelectric generation, which has been caused by the growing share of fossil fuels, with solar, wind and biomass remaining underutilized. Meanwhile, the under-exploitation of Cameroon’s energy potential is mainly due to technological, financial, management, and the lack of skills barriers. However, the current rapid development of renewable energy technologies and financial support provided by the International Community under the Paris Agreement are opportunities that Cameroon can seize to engage significantly in R&DV, to promote its energy potential and reduce its dependence on foreign technologies. In this regard, this paper provided some pathways through which policymakers should pay more attention. 展开更多
关键词 Cameroon RENEWABLE ENERGY solar ENERGY wind ENERGY biomass ENERGY HYDROPOWER
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A unified model for diagnosing energy usage abnormalities in regional integrated energy service systems
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作者 Di Wu Hongwei Ma +3 位作者 Jianrong Mao Kaiqi Ma Hao Zheng Zhiqian Bo 《全球能源互联网:英文版》 2019年第4期361-367,共7页
An integrated energy service company in an industrial park or commercial building is responsible for managing all energy sources in their local region, including electricity, water, gas, heating, and cooling. To reduc... An integrated energy service company in an industrial park or commercial building is responsible for managing all energy sources in their local region, including electricity, water, gas, heating, and cooling. To reduce energy wastage and increase energy utilization, it is necessary to perform efficiency analyses and diagnoses on integrated energy systems(IESs). However, the integrated energy data necessary for energy efficiency analyses and diagnoses come from a wide variety of instruments, each of which uses different transmission protocols and data formats. This makes it challenging to handle energy-flow data in a unified manner. Thus, we have constructed a unified model for diagnosing energy usage abnormalities in IESs. Using this model, the data are divided into working days and non-working days, and benchmark values are calculated after the data have been weighted to enable unified analysis of several types of energy data. The energy-flow data may then be observed, managed, and compared in all aspects to monitor sudden changes in energy usage and energy wastage. The abnormal data identified and selected by the unified model are then subjected to big-data analysis using technical management tools, enabling the detection of user problems such as abnormalities pertaining to acquisition device, metering, and energy usage. This model facilitates accurate metering of energy data and improves energy efficiency. The study has significant implications in terms of fulfilling the energy saving. 展开更多
关键词 INTEGRATED ENERGY services ENERGY efficiency analysis ENERGY USAGE diagnosis ENERGY USAGE ABNORMALITIES UNIFIED model
苏州某大型综合医院建筑能耗分析与节能探讨 预览 被引量:1
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作者 林然 《建筑节能》 CAS 2019年第2期57-59,63共4页
对苏州市某大型综合性医院2014-2016年的能源消费情况进行了统计分析,医院的能源形式包含了电力、天然气、市政蒸汽,其中电力和市政蒸汽共占到医院总能耗量的97.20%,医院用能处于苏州同类型综合医院的中等水平,同时对本医院后期的节能... 对苏州市某大型综合性医院2014-2016年的能源消费情况进行了统计分析,医院的能源形式包含了电力、天然气、市政蒸汽,其中电力和市政蒸汽共占到医院总能耗量的97.20%,医院用能处于苏州同类型综合医院的中等水平,同时对本医院后期的节能策略进行了探讨,以期为当地医院类建筑节能提供参考。 展开更多
关键词 综合性医院 能源 用能水平 节能策略
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Building a sustainable organizational energy evaluation system in the Asia Pacific
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作者 Edward Vine 《全球能源互联网:英文版》 2019年第5期379-386,共8页
In the face of climate change and with the vision for the future of humanity represented by the Sustainability Development Goals,sustainability has become associated with the major and rapid transformation of global s... In the face of climate change and with the vision for the future of humanity represented by the Sustainability Development Goals,sustainability has become associated with the major and rapid transformation of global systems and the resilience of transformed systems to adapt over time.This dynamic view of transformation has implications for both the design of tran sformatio nal energy in itiatives and their evaluation.As there is an urge nt n eed to evaluate the scale,scope,nature,and sufficiency of transformation toward planetary sustainability,a framework(model)is proposed to determine the most effective en ergy evaluati on capacity buildi ng strategies for achievi ng various in dividual and group level outcomes,most effective strategies for certain types of participants,and design of different strategies to maximize their impact in a sustainable way.Furthermore,a new energy evaluation organization is identified,which is expected to lead us into this new era. 展开更多
关键词 ENERGY evaluation ENERGY efficiency BUILDING capacity Asia PACIFIC RENEWABLE ENERGY
Prospects for key technologies of new-type urban integrated energy system
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作者 Dan Wang Chengshan Wang +2 位作者 Yang Lei Ziyang Zhang Niepeng Zhang 《全球能源互联网:英文版》 2019年第5期403-413,共11页
In recent years,primary energy consumption in China’s urban areas has increased rapidly,facing the problems of extensive use of energy,high energy consumption and insufficient intensified use of energy resources.Impr... In recent years,primary energy consumption in China’s urban areas has increased rapidly,facing the problems of extensive use of energy,high energy consumption and insufficient intensified use of energy resources.Improving multienergy supply,increasing the proportion of clean energy and integrated energy efficiency are the main goals of urban development.The integrated energy system with multi-functional synergy and open trading will become one of the new directions for the development of new urban energy systems.This paper summarizes the main problems faced by the current towns and the characteristics of the new urban energy system,analyzes the development of new urban energy system from three aspects including energy interconnection hub infrastructure construction,energy management platform construction and energy value sharing,and forecasts the future development direction of new urban energy systems. 展开更多
关键词 New TOWNS Integrated ENERGY systems Inten sification ENERGY in terconnecti on HUB INFRASTRUCTURE Energymanagement platform ENERGY value sharing.
基于SEEMP的船舶营运能效评价指数的开发及应用:韩国某案例研究 预览
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作者 Nam-kyun IM Bora Choe Chung-Hwan Park 《船舶与海洋工程学报:英文版》 CSCD 2019年第2期185-194,共10页
The CO2 emission reduction policy of the International Maritime Organization(IMO)recommends that the operation of ships,managed by maritime transport companies,should be energy-efficient.An evaluation method that can ... The CO2 emission reduction policy of the International Maritime Organization(IMO)recommends that the operation of ships,managed by maritime transport companies,should be energy-efficient.An evaluation method that can determine how successfully a ship implements the energy efficiency plan is proposed in this study.To develop this method,the measures required for energy-efficient ship operations according to the Ship Energy Efficiency Management Plan(SEEMP)operational guidelines were selected.The weights of the selected measures,which indicate how they contribute to the energy-efficient operation of a ship,were derived using a survey based on the analytic hierarchy process(AHP)method.Consequently,using these measures and their weights,a new evaluation method was proposed.This evaluation method was applied to shipping companies in South Korea,and their ship operation energy efficiency indices were derived and compared.This evaluation method will be useful to the government and shipping companies in assessing the energy efficiency of ship operations. 展开更多
关键词 SHIP GREENHOUSE gas SHIP ENERGY EFFICIENCY Management Plan ENERGY EFFICIENCY Operational Indicator ENERGY EFFICIENCY Design Index
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Energy Cycle Insingle Degree of Freedom Conservative Vibration Isolation Systems 预览
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作者 Gaofeng Guan Dengfeng Xu +2 位作者 Yu Zhu Qiang Yu Qiang Li 《北京理工大学学报:英文版》 EI CAS 2019年第3期644-650,共7页
To obtain a longer natural period in single degree of freedom(SDF) conservative vibration isolation systems, many scholars have proposed different methods. This paper uncovers a clockwise energy cycle existing in a ma... To obtain a longer natural period in single degree of freedom(SDF) conservative vibration isolation systems, many scholars have proposed different methods. This paper uncovers a clockwise energy cycle existing in a mass-spring system, in which the potential energy and kinetic energy convert with each other, and the natural period is determined by the magnitude of the energy cycle. Compared to water flow inside a pipe, the previous methods can be consolidated into two methods to make the energy cycle narrower;one is to optimize the parameters directly, the other is to indirectly add an anticlockwise energy cycle to the original one. The anticlockwise energy cycle has the characteristic of gravitational potential energy or elastic potential energy that reduces with displacement. The highly abstract method can provide a better optimization tool to design a practice system. 展开更多
关键词 vibration ISOLATION natural PERIOD ENERGY CYCLE potential ENERGY KINETIC ENERGY
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Alleviating freshwater shortages with combined desert-based large-scale renewable energy and coastal desalination plants supported by Global Energy Interconnection
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作者 Hengxu Zhang Yuzheng Xie 《全球能源互联网:英文版》 2019年第3期205-213,共9页
Under the background of sustainable energy transition and environmental protection,Global Energy Interconnection(GEI),which features an innovative combination of clean energy(e.g.,solar power) and ultra-high voltage(U... Under the background of sustainable energy transition and environmental protection,Global Energy Interconnection(GEI),which features an innovative combination of clean energy(e.g.,solar power) and ultra-high voltage(UHV) transmission technologies,provides a means to realize global climate governance.China is a large country with unevenly distributed water resources,energy production,and energy consumption,and the large areas of desert in northern and western China have the potential for installing large-scale solar power plants.This study analyzed the potential of using large-scale solar power from deserts to coastal seawater desalination plants,which could alleviate the freshwater crisis and control desertification in China.First,the measurement data from NASA were used to estimate the potential exploitable amount of solar energy in desert areas.A macro idea was proposed for the transmission of electrical power from inland integrated energy bases to coastal seawater desalination and pumping of freshwater to western China to combat desertification and alleviate the freshwater crisis.Based on this,the electricity demands for desalination and water redistribution were estimated.As a huge interruptible load,desalination and pumping systems could be used to suppress power fluctuations of the integrated energy bases.Finally,the fundamental support roles of UHV grids in large-scale renewable energy allocation and utilization were discussed.This analysis offers a theoretical framework to help realize efficient renewable energy generation and consumption and alleviate freshwater shortage. 展开更多
关键词 DESERT DESALINATION ENERGY crisis Freshwater GLOBAL ENERGY INTERCONNECTION (GEI) Solar ENERGY Ultra-high voltage (UHV).
The Development of cross border interconnection and trading
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作者 Barrie Murray 《全球能源互联网:英文版》 2019年第3期254-263,共10页
This paper discusses the ben efits of developing cross border in tercon nection. It was writte n to promote the ben efits of interc on nectio n to facilitate ren ewable en ergy developme nt and trading. It illustrates... This paper discusses the ben efits of developing cross border in tercon nection. It was writte n to promote the ben efits of interc on nectio n to facilitate ren ewable en ergy developme nt and trading. It illustrates the assessme nt of the ben efit with coupling between two power systems with an example importing renewable energy. The strategy for the development of European wide in tercon necti on to level prices is described together with the trading arrangeme nts. The process to evaluate the pote ntial for new intercon nectio n investment is outli ned together with a discussi on of the tech no logy options. The paper concludes with an illustration of the arrangements for cross border trading. 展开更多
关键词 GEI Global ENERGY INTERCONNECTION RENEWABLE ENERGY EUROPE Investment ENERGY importing
Pumped hydro energy storage and 100% renewable electricity for East Asia
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作者 Cheng Cheng Andrew Blakers +1 位作者 Matthew Stocks Bin Lu 《全球能源互联网:英文版》 2019年第5期387-393,共7页
Rapid cost reductions have led to the widespread deployment of renewable technologies such as solar photovoltaics(PV)and wind globally.Additional storage is needed when the share of solar PV and wind in electricity pr... Rapid cost reductions have led to the widespread deployment of renewable technologies such as solar photovoltaics(PV)and wind globally.Additional storage is needed when the share of solar PV and wind in electricity production rises to 50–100%.Pumped hydro energy storage constitutes 97%of the global capacity of stored power and over 99%of stored energy and is the leading method of energy storage.Off-river pumped hydro energy storage options,strong interconnections over large areas,and demand management can support a highly renewable electricity system at a modest cost.East Asia has abundant wind,solar,and off-river pumped hydro energy resources.The identified pumped hydro energy storage potential is 100 times more than required to support 100%renewable energy in East Asia. 展开更多
关键词 Photovoltaics WIND ENERGY PUMPED HYDRO ENERGY storage 100% RENEWABLE ENERGY
Decentralized Control for Residential Energy Management of a Smart Users’ Microgrid with Renewable Energy Exchange 预览
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作者 Raffaele Carli Mariagrazia Dotoli 《自动化学报:英文版》 CSCD 2019年第3期641-656,共16页
This paper presents a decentralized control strategy for the scheduling of electrical energy activities of a microgrid composed of smart homes connected to a distributor and exchanging renewable energy produced by ind... This paper presents a decentralized control strategy for the scheduling of electrical energy activities of a microgrid composed of smart homes connected to a distributor and exchanging renewable energy produced by individually owned distributed energy resources. The scheduling problem is stated and solved with the aim of reducing the overall energy supply from the grid, by allowing users to exchange the surplus renewable energy and by optimally planning users’ controllable loads. We assume that each smart home can both buy/sell energy from/to the grid taking into account time-varying non-linear pricing signals. Simultaneously, smart homes cooperate and may buy/sell locally harvested renewable energy from/to other smart homes. The resulting optimization problem is formulated as a non-convex non-linear programming problem with a coupling of decision variables in the constraints. The proposed solution is based on a novel heuristic iterative decentralized scheme algorithm that suitably extends the Alternating Direction Method of Multipliers to a non-convex and decentralized setting. We discuss the conditions that guarantee the convergence of the presented algorithm. Finally, the application of the proposed technique to a case study under several scenarios shows its effectiveness. 展开更多
关键词 Alternating direction method of multipliers decentralized control ENERGY MANAGEMENT MICROGRID non-convex optimization RENEWABLE ENERGY RESIDENTIAL ENERGY MANAGEMENT SMART homes
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Basic characteristics of nuclear landscape by improved Weizs-cker-Skyrmetype nuclear mass model
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作者 马娜娜 张海飞 +1 位作者 包小军 张鸿飞 《中国物理C:英文版》 SCIE CAS CSCD 2019年第4期114-129,共16页
Atomic Mass Evaluation(AME2016) has replenished the latest nuclear binding energy data. Other physical observables, such as the separated energies, decay energies, and the pairing gaps, were evaluated based on the new... Atomic Mass Evaluation(AME2016) has replenished the latest nuclear binding energy data. Other physical observables, such as the separated energies, decay energies, and the pairing gaps, were evaluated based on the new mass table. An improved Weizs?cker-Skyrme-type(WS-type) nuclear mass model with only 13 parameters was presented, including the correction from two combinatorial radial basis functions(RBFs), where shell and pairing effects are simultaneously dealt with using a Strutinsky-like method. The RBFs code had 2267 updated experimental binding energies as inputs, and their correspondent root-mean square(rms) deviations dropped to 149 keV. For the training of other mass models by RBFs correction, rms deviations are clustered between 100 keV to 200 keV. Compared with other experimental quantities, the rms deviations calculated within the improved WS-type model falls between 100 keV and 250 keV. We extrapolate the binding energies to 12435 nuclei, which covers the ranges 8 ≤ Z ≤ 128 and 8 ≤ N ≤ 251 in the framework of the WS-type model with RBFs correction. Simultaneously, the ground state deformations β2,4,6 and all parts in the WS-type mass formula are presented in this paper. Finally, we tabulated all calculated characteristics within the improved formula and linked them to https://github.com/lukeronger/Nuclear Data-LZU: nuclear binding energies, one-nucleon and two-nucleon separation energies(Sn,p,2n,2p), and β-decay energies( Qα and Qβ-,β+,EC), and the pairing gap △n and △p. 展开更多
关键词 mass model RADIAL basis functions binding ENERGY SEPARATED ENERGY DECAY ENERGY PAIRING gap
Energy loss of degrader in SC200 proton therapy facility 预览
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作者 Feng Jiang Yun-Tao Song +4 位作者 Jin-Xing Zheng Xian-Hu Zeng Peng-Yu Wang Jun-Sheng Zhang Wu-Quan Zhang 《核技术:英文版》 SCIE CAS CSCD 2019年第1期11-18,共8页
The proton beam energy determines the range of particles and thus where the dose is deposited. According to the depth of tumors, an energy degrader is needed to modulate the proton beam energy in proton therapy facili... The proton beam energy determines the range of particles and thus where the dose is deposited. According to the depth of tumors, an energy degrader is needed to modulate the proton beam energy in proton therapy facilities based on cyclotrons, because the energy of beam extracted from the cyclotron is fixed. The energy loss was simulated for the graphite degrader used in the beamline at the superconducting cyclotron of 200 MeV in Hefei(SC200). After adjusting the mean excitation energy of the graphite used in the degrader to 76 eV, we observed an accurate match between the simulations and measurements.We also simulated the energy spread of the degraded beam and the transmission of the degrader using theoretical formulae. The results agree well with the Monte Carlo simulation. 展开更多
关键词 Degrader ENERGY LOSS Mean EXCITATION ENERGY ENERGY SPREAD Transmission
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