轨道转移飞行器复杂环境下假星干扰与星图识别研究

通过复杂环境下假星模拟,研究假星数目及K矢量查找角距阈值ε对星图识别成功率的影响,采用惯性数据辅助识别的方法,改善了星图识别的成功率。星图识别仿真结果表明,存在假星情况下,假星数目的增加及K矢量查找角距阈值ε的增大会降低星图识别成功率,假星数为7,ε取8″时,成功率仅为42.7%;惯性数据辅助识别相较于传统星图识别成功率在ε取5″、6″典型值时分别提高约29%和54%,识别成功率由传统方法的70%左右提升到99%以上,为工程应用提供了理论支撑。

洪武通宝小平钱星月纹版式分析——兼谈星月纹的鉴别问题

明太祖朱元璋于洪武元年(公元1368年)统一全国后,即令户部、工部和各行省按大中通宝钱形制,开铸洪武通宝钱。其中所铸小平,为洪武钱之最多者,且有不少是饰有星月纹的。但在目前所出之各种钱币书籍、图谱中,均未见载有星月纹洪武通宝小平钱。笔者在集藏中体会到:洪武通宝小平星月纹钱,实为明钱中之最多者。故特将所藏所见的一部分洪武通宝小平星月纹钱,分类叙述于后,以供同好参考、研究。一、面星纹1、“洪”右星“武”右星:该钱钱径23、穿径6.0、厚1.2毫米,重3克;钱体光洁润滑,青绿锈,穿口整洁,背内廓较宽;文字双点“通”,“通”字长尾上翘,斜“止”武,长宝(图1)。

On Governance of Celebrity Endorsements in False Advertising

incidents of extreme hyperbole and fraud in celebrity advertisements have occurred repeatedly because advertising participants are driven by commercial interests and it is also relevant to the deep social and cultural background. Therefore, great and prolonged efforts should be made to govern celebrity advertising in a multi-pronged way： strengthening legal supervision on the basis of clearly defined false advertising; establishing early warning and punishing systems including pre-qualification system, filing system and banning system; promoting public interest litigation system; increasing consumers＇ media literacy.