Uniformity of warhead axial charge and influences of different warhead wall thicknesses on measurement results were studied by industrial computed tomography(C T).By comparing the differences of relative density value...Uniformity of warhead axial charge and influences of different warhead wall thicknesses on measurement results were studied by industrial computed tomography(C T).By comparing the differences of relative density values of the same simulation charge sample assembled in simulation bodies with different wall thicknesses,effects of warhead wall thickness on charge CT relative density values were analyzed.The results show that CT value increases by about1%with the increase of each additional1mm of wall thickness under the same simulation charge for the projectile with outer diameter of100mm and internal diameterof90mm.There fore,to detect uniformity along warhead axial(upper,middle and lower sections)charge density within penetration ability range of industrial CT(IC T),the CT values of various parts(upper,middle and lower sections)may be only measured without measuring absolute density of charge.By subtracting changes in the CT values caused by warhead wall thickness variation,the CT values of various parts under the same charge can describe warhead axial charge uniformity.展开更多
China's IC industry has been flourishing in recent years,huge market demand together with government investments are the major driving forces for this development.The status and development momentum of the Chinese...China's IC industry has been flourishing in recent years,huge market demand together with government investments are the major driving forces for this development.The status and development momentum of the Chinese IC industry also attracted wide interest and attention of international counterparts.A group of domestic IC experts are invited by the JoMM to write a series of articles about China's IC industry,including the history,current status,development,and related government policies.Information in these articles is all from public data from recent years.The purpose of these articles is to enhance mutual understanding between the Chinese domestic IC industry and international IC ecosystem.The following article is the first one of this series,the status quo of China's IC industry.The IC industry chain is very long including design,manufacturing,special equipment,materials,packaging and testing.The article series are arranged in accordance with this order.展开更多
以Web of Science上有关冰雪产业的1119篇论文为研究对象,运用文献计量法和知识图谱分析法考察了世界范围内冰雪产业的发展态势和研究热点变迁。通过对相关文献的进一步筛选,主要集中于产业经济的相关研究,对于论文与期刊分布、不同时...以Web of Science上有关冰雪产业的1119篇论文为研究对象,运用文献计量法和知识图谱分析法考察了世界范围内冰雪产业的发展态势和研究热点变迁。通过对相关文献的进一步筛选,主要集中于产业经济的相关研究,对于论文与期刊分布、不同时间段发文频次对比、关键词频次分析和相关热点研究,得出了以下结论:(1)冰雪旅游、气候变化、适应性和可持续性是国外冰雪产业研究的热点;如何进行冰雪产业的多样化发展,从而避免冰雪产业过度依赖于自然条件成为国外冰雪产业研究的重点;如何根据当地气候变化进行相关生态保护和其他冰雪衍生产业的研究成为国外冰雪产业研究的方向。(2)国外冰雪产业相对其他产业来说起步较晚,近几年关于冰雪产业相关研究的文献数量逐年增加。特别是中国作者在中国获得2022年冬奥会举办权后的发文量明显增加。国外冰雪产业研究具有较为明显地趋向于优质冰雪自然资源区域的地理区位发展趋势。(3)冰雪资源开发过程中注重环境保护和气候变化引致人工造雪经济成本增加、减少滑雪运动受伤率研究和冬季旅游是发展滑雪旅游有效途径,结合新的营销手段和媒体平台和扩大相关消费人群将成为国外冰雪产业链上中下游环节研究的发展趋势。(4)集中度较高、进入壁垒较高、产品差异化明显和定价策略、品牌宣传、服务竞争、人才竞争和通过扩展服务领域来实现经济效应将成为冰雪产业SCP研究范式的发展特征。展开更多
文摘Uniformity of warhead axial charge and influences of different warhead wall thicknesses on measurement results were studied by industrial computed tomography(C T).By comparing the differences of relative density values of the same simulation charge sample assembled in simulation bodies with different wall thicknesses,effects of warhead wall thickness on charge CT relative density values were analyzed.The results show that CT value increases by about1%with the increase of each additional1mm of wall thickness under the same simulation charge for the projectile with outer diameter of100mm and internal diameterof90mm.There fore,to detect uniformity along warhead axial(upper,middle and lower sections)charge density within penetration ability range of industrial CT(IC T),the CT values of various parts(upper,middle and lower sections)may be only measured without measuring absolute density of charge.By subtracting changes in the CT values caused by warhead wall thickness variation,the CT values of various parts under the same charge can describe warhead axial charge uniformity.
文摘China's IC industry has been flourishing in recent years,huge market demand together with government investments are the major driving forces for this development.The status and development momentum of the Chinese IC industry also attracted wide interest and attention of international counterparts.A group of domestic IC experts are invited by the JoMM to write a series of articles about China's IC industry,including the history,current status,development,and related government policies.Information in these articles is all from public data from recent years.The purpose of these articles is to enhance mutual understanding between the Chinese domestic IC industry and international IC ecosystem.The following article is the first one of this series,the status quo of China's IC industry.The IC industry chain is very long including design,manufacturing,special equipment,materials,packaging and testing.The article series are arranged in accordance with this order.
文摘以Web of Science上有关冰雪产业的1119篇论文为研究对象,运用文献计量法和知识图谱分析法考察了世界范围内冰雪产业的发展态势和研究热点变迁。通过对相关文献的进一步筛选,主要集中于产业经济的相关研究,对于论文与期刊分布、不同时间段发文频次对比、关键词频次分析和相关热点研究,得出了以下结论:(1)冰雪旅游、气候变化、适应性和可持续性是国外冰雪产业研究的热点;如何进行冰雪产业的多样化发展,从而避免冰雪产业过度依赖于自然条件成为国外冰雪产业研究的重点;如何根据当地气候变化进行相关生态保护和其他冰雪衍生产业的研究成为国外冰雪产业研究的方向。(2)国外冰雪产业相对其他产业来说起步较晚,近几年关于冰雪产业相关研究的文献数量逐年增加。特别是中国作者在中国获得2022年冬奥会举办权后的发文量明显增加。国外冰雪产业研究具有较为明显地趋向于优质冰雪自然资源区域的地理区位发展趋势。(3)冰雪资源开发过程中注重环境保护和气候变化引致人工造雪经济成本增加、减少滑雪运动受伤率研究和冬季旅游是发展滑雪旅游有效途径,结合新的营销手段和媒体平台和扩大相关消费人群将成为国外冰雪产业链上中下游环节研究的发展趋势。(4)集中度较高、进入壁垒较高、产品差异化明显和定价策略、品牌宣传、服务竞争、人才竞争和通过扩展服务领域来实现经济效应将成为冰雪产业SCP研究范式的发展特征。
