Morphing leading edge has great potential for noise abatement and aerodynamic efficiency improvement.The drooping effect is realized by bending of the flexible skin which encloses to form the leading edge.Since the flexible skin is often made of composite
合理划分以国家公园为主体的自然保护地领域的财政事权和支出责任,是自然保护地资金机制良性运行、“生态保护第一”得以体现的基础。自然保护地财政事权和支出责任,从根本上是由保护地管理体制决定的。中国自然保护地管理体制正经历从各行业指导下的属地管理到统一管理改革的过渡时期,财政事权和支出责任也应做相应的调整和安排。但对国家公园试点区现状的分析表明,四种体制下的国家公园财政事权划分仍然都存在着不清晰、不合理、不规范的问题,其成因既有自然保护财政事权和支出责任划分历史问题的延续,也有机构改革带来的新的事权摩擦,同时还
3月25日,中共黑龙江省通信管理局直属机关委员会组织召开青年理论学习小组2021年第一季度集中学习交流会.重点学习《习近平在党史学习教育动员大会上的讲话》《习近平在中央
This work reveals that the addition of periodically distributed stitches to sandwich struc-ture enables a significant reduction of vibration in stop-band and th
3月8日,黑龙江省通信管理局召开局党组理论中心组2021年第四次扩大学习会议,传达学习习近平总书记在党史学习教育动员大会上的讲话精神和肖亚庆部长在工信部系统党史学习教育
Since proposed,the self-similarity variables based genuinely multidimensional Riemann solver is attracting more attentions due to its high resolution in multidimensional complex flows.However,it needs numerous logical operations in supersonic cases,which
4月20至21日,黑龙江省通信管理局召开第二期党史学习教育专题读书班研讨会,将党史学习教育与习近平总书记关于工业和信息化的重要论述和重要指示批示精神紧密结合,对习近平同
Humans'initial desire for flight stems from the imitation of flying creatures in nature.The excellent flight performance of flying animals will inevitably beco
The brazing of diamond is a promising way to fabricate grinding wheels for efficient machining and precision grinding.This work investigated the feasibility of
The Grid-Characteristic numerical Method(GCM)that is quite common in solving aero and hydrodynamic problems can also be applied for mechanics of solids.It allows to implement complex border and contact conditions,including the non-reflecting border and th