冰雪经济板块指数日K线图 郭晨凯 制图 ◎记者 费天元 12月2日，A股市场弱势整理，有色金属、AI应用等前期热点板块出现调整，拖累三大股指。截至收 盘，上证指数报3897.71点，跌0.42%；深证成指报13056.70点，跌0.68%；创业板指报3071.15点，跌 0.69%。沪深两市合计成交15934亿元，较前一日缩量2805亿元。 冰雪经济概念"火热" 本周前两个交易日，A股冰雪经济概念持续活跃。个股方面，冰山冷热昨日早盘直线拉升封住涨停，股 价录得两连板，公司主营工业制冷设备业务；雪人集团、晶雪节能、新世界、长白山等概念股跟涨。 商业航天概念多股涨停 商业航天概念近期持续升温，昨日相关概念股再度大涨，通宇通讯收获日线四连板，顺灏股份、航天发 展、雷科防务收获日线三连板，招标股份收获20%幅度涨停。 消息面上，据"中国运载火箭技术研究院"微信号消息，11月30日，由火箭院抓总研制的我国首艘火箭网 系回收海上平台命名为"领航者"，并成功交付，这标志着火箭院在可重复使用运载火箭技术链条上完成 了至关重要的一环，助推从技术验证到工程应用的跨越。目前，该平台已获得中国船级社（CCS）签发 的入级证书和法定证 ...

Core Viewpoint - The successful delivery of China's first offshore rocket recovery platform "Navigator" marks a significant advancement in the development of a stable, reliable, and precise rocket recovery system at sea [1] Group 1: What is Network Recovery? - Network recovery is a unique method of vertical landing recovery, which involves deploying a network of cables at high altitudes to capture the rocket as it descends [2] - This method differs from traditional recovery techniques, such as parachute recovery and vertical landing, by utilizing a hook on the rocket that latches onto a grid-like structure [2] Group 2: Advantages of Network Recovery - Network recovery enhances the success rate of capturing and buffering during the recovery process through high coordination between the recovery system and the rocket's recovery device [3] - It is more forgiving on landing parameters, as the ground buffering system absorbs most of the rocket's kinetic and potential energy, reducing design requirements for the rocket's buffering structures [3] - The system simplifies the rocket's structure, improving efficiency and effectiveness, and can be adapted for different sizes of rockets [3] Group 3: Technical Challenges of "Navigator" - "Navigator" is the first offshore rocket recovery platform certified by a classification society, measuring 144 meters in length and 50 meters in width, with a displacement of 25,000 tons [4] - The platform requires high precision in positioning to coordinate with the rocket's landing, necessitating advanced design considerations for stability and load distribution [4] - The design must account for various sea conditions and the unique structural challenges posed by the network recovery system, which has a high center of gravity and significant weight [4]