Core Viewpoint - The article discusses the historical development of aviation, highlighting key figures and technological advancements that have shaped the industry over time. Group 1: Historical Milestones - The ancient Chinese had dreams of flying, as evidenced by historical artifacts like the Dunhuang murals [4] - The first powered flight was achieved by the Wright brothers in 1903, marking the beginning of modern aviation [7] - Chinese aviator Feng Ru created two aircraft models and conducted test flights in China, but tragically died in a crash in 1912 [12] Group 2: Engineering Challenges - Early aviation safety considerations focused on structural integrity, such as wing strength and fuselage durability [13][17] - Engineers used sandbags to simulate aerodynamic loads during ground tests due to the lack of advanced technology [16] - The concept of strength refers to a structure's ability to resist failure under load [17] Group 3: Aircraft Design and Safety - Lift is generated by the pressure difference between the upper and lower surfaces of the wing as it moves through the air [20] - Aircraft can experience vibrations and structural deformation during high-speed flight, necessitating a focus on wing stiffness [26][28] - Historical aircraft like the DC-3 and the Comet faced structural failures due to material fatigue [29][31] Group 4: Material Science and Testing - The introduction of fatigue testing and damage tolerance concepts has improved aircraft safety [59][62] - Modern aircraft design utilizes advanced materials like carbon fiber composites, which offer high strength-to-weight ratios [78][79] - Testing methods have evolved to include simulations and dynamic load tests to ensure structural integrity [88][90] Group 5: Human Factors and Operational Safety - Human error accounts for 70% to 80% of aviation accidents, highlighting the importance of training and technology in mitigating risks [93] - Modern aircraft employ advanced flight control systems that reduce the likelihood of pilot error [97] Group 6: Future of Aviation - The future of aviation is expected to integrate air and space travel, with advancements in high-speed vehicles that could redefine distance and travel time [130][131]

通过佩戴框架眼镜、隐形眼镜或进行近视屈光矫正手术，可以让近视者重新看清远处物体。这些方法属于光学矫正，能有效改善视力，但本质 上是"代偿"而非"治愈"。"让眼睛完全恢复到未近视的状态目前无法实现。"付晶说，多数近视是由于眼轴过度增长导致的，而眼轴一旦变长就 无法缩短。因此，近视可以通过外部手段矫正视力，但无法从根本上"治愈"眼球结构的改变。 新华社北京6月6日电（记者侠克）现代社会快节奏的生活模式下，电子设备使用时长激增，不良用眼习惯普遍，近视、眼疲劳等问题威胁各年 龄段人群的眼部健康。每年的6月6日是全国爱眼日，针对公众关注较高的几类问题，记者采访了首都医科大学附属北京同仁医院斜视与小儿眼 科主任医师付晶。 ——如何区分真性近视和假性近视？近视能否被治愈？专家表示，区分真性近视和假性近视的金标准是散瞳验光，需要在医院或专业视光机 构，使用睫状肌麻痹剂进行散瞳，放松眼部调节肌肉后再进行验光。如果散瞳后仍存在近视度数，说明是真性近视，如果度数消失或明显降 低，视物恢复清晰，则为假性近视。 ——关灯后看手机对眼睛伤害有多大？付晶说，黑暗环境中瞳孔扩大，让更多光线进入眼球，而手机屏幕产生的短波有害蓝光可穿透晶状体， ...

Box Office Performance - "Mission: Impossible 8" has achieved significant box office success since its release, maintaining the top position in the domestic box office rankings [1] - As of June 4, the global box office revenue for "Mission: Impossible 8" reached $353.8 million [5] - The film's release has led to the best box office performance for IMAX cinemas during the Dragon Boat Festival since 2019 [5] Franchise History - The "Mission: Impossible" series has been around for nearly 30 years, originating from a Cold War-era American television series [3] - The franchise has seen increasing box office success over the years, with "Mission: Impossible 4," "6," and "7" grossing ¥6.72 billion, ¥8.68 billion, and ¥12.45 billion respectively [3] - "Mission: Impossible 7" experienced a significant drop in box office performance, failing to meet the predicted ¥400 million in China, marking the first loss for the franchise with a global loss of approximately $25 million [3] Industry Challenges - Hollywood has faced declining box office performance in recent years, with many major releases underperforming [7] - The reliance on established IPs has led to a lack of originality, resulting in audience fatigue and diminishing returns [8] - The production costs for major films like "Mission: Impossible 8" have escalated, nearing $400 million, due to pandemic-related delays and rising labor costs [10] Production Environment - The film industry in Los Angeles has seen a 58% decline in production volume since its peak in 2021, leading to a loss of approximately 40,000 jobs in the California film industry in 2023 [10] - Some films that would typically be produced in Hollywood are moving to other states or countries that offer tax incentives and favorable policies [10] - California Governor Gavin Newsom has publicly acknowledged the struggles faced by the Los Angeles film industry [11]

以下文章来源于简单心理 ，作者简单心理APP 简单心理 . 简单心理成立于2014年，提供专业心理服务，包括心理科普、心理咨询、心理咨询、企业服务等。 本文来自微信公众号： 简单心理 （ID：jdxl2000） ，作者：西维、香菜，原文标题：《这个无意识 举动，正在耗尽你的活人感》，题图来源：AI生成 最近又到了半年一度的网络购物节，我跟风囤货，书本、日用、护肤品，挑挑拣拣几个小时，深夜才 结束战斗。 头晕脑涨地看着购物车结算显示的"已优惠xx元"，我忽然察觉，购物节似乎令人在一天内做了太多 选择。 下单怎么组合更划算，洗发水要滋润型还是蓬松型，这些碎小又连续的决策题目无孔不入，让人不知 不觉就疲惫不堪。 问了问身边的小伙伴，发现不少人也有同感。有人厌倦决定晚饭，做了表格每天投骰子；还有人讨厌 思考穿搭，每天穿同一款T恤。也有人说自己买东西一连对比三个平台，最后放弃下单。 其实，心理学对此早有察觉，将这种状态称为"决策疲劳" （Decision Fatigue） 。 01、不是意志薄弱，是大脑真的 累了 在了解"决策疲劳"前，我们需要先了解"决策"行为是如何进行的。 诺贝尔经济学奖获得者丹尼尔·卡曼尼提出的" ...

Core Viewpoint - The article discusses the phenomenon of "decision fatigue," which occurs when individuals are overwhelmed by the sheer number of choices they face, leading to poor decision-making and impulsive behavior. Group 1: Understanding Decision Fatigue - Decision-making involves two systems: a fast, intuitive system and a slow, rational system, both of which consume mental energy [6][7] - Decision fatigue sets in when too many choices are made in a short period, exhausting mental resources [8] - The more decisions made throughout the day, the harder it becomes to make further choices, often resulting in impulsive or avoidance behaviors [9][10] Group 2: Impact of Choices on Decision Quality - An increase in choices does not guarantee better outcomes; rather, it can lead to indecision and abandonment of choices [18][20] - A study showed that fewer options can lead to higher purchase rates, as seen in a jam-tasting experiment [19] - The complexity of choices can lead to procrastination and difficulty in making decisions, especially in everyday scenarios [21][22] Group 3: Nighttime Decision-Making - People tend to make poorer decisions at night, often leading to impulsive purchases or regrettable actions [22][27] - Sleep deprivation significantly affects the brain's ability to make rational decisions, particularly in high-stakes situations [26][28] - The average sleep time has decreased by nearly 1.5 hours compared to a decade ago, contributing to decision fatigue [25] Group 4: Strategies to Mitigate Decision Fatigue - To combat decision fatigue, individuals can improve their daily rhythms, reduce unnecessary choices, and optimize decision-making processes [29] - Taking breaks and ensuring adequate sleep can help restore mental clarity for better decision-making [30][32] - Making important decisions during the day when cognitive resources are highest is recommended [33][34] - Establishing default settings in daily life can alleviate decision-making pressure [35][36] - Preparing in advance can reduce cognitive load and streamline future decisions [39][41]

Core Concept - The article discusses the concept of "sunk cost" and its psychological effects on decision-making, emphasizing the importance of recognizing and overcoming these biases to make better choices in life and investments [2][3][11]. Group 1: Understanding Sunk Cost - Sunk cost refers to past expenditures that cannot be recovered, including time, money, and effort [3][4]. - The article illustrates the sunk cost effect through a shoe-buying scenario, where individuals may continue to invest time and energy into a poor decision due to emotional attachment and the desire to avoid loss [6][8]. Group 2: Psychological Factors - The phenomenon of loss aversion explains why individuals struggle to let go of sunk costs, as the pain of losing something is often felt more acutely than the pleasure of gaining something [9][10]. - The article highlights that those who can decisively cut their losses tend to save time and energy, allowing them to focus on more important decisions [11]. Group 3: Recommendations to Overcome Sunk Cost - Emphasizing the value of time is crucial, as time is a finite resource that should be spent wisely to maximize productivity [13][14]. - Recognizing that sunk costs are irretrievable can help individuals avoid unnecessary emotional turmoil and make clearer decisions [17]. - Developing a goal-oriented mindset can prevent individuals from being sidetracked by irrelevant opportunities, ensuring that they stay focused on their primary objectives [18]. - Reducing the frequency of trivial decisions can help conserve mental energy, allowing for better decision-making in more significant matters [20].

伸个懒腰、拉拉小腿……不少人觉得拉伸完了很舒服，尤其对于久坐的上班族，拉伸不仅能缓解疲劳，还能为健康加分。一项研究发现，拉伸有 助改善血压，效果还比快走更胜一筹。 你有多久没有好好拉伸一下了？ 降压方面 拉伸比快走更有效 研究发现，拉伸在降血压方面要比快步走更胜一筹。该研究招募40名平均年龄61岁、具有高血压I期或血压正常偏高的男女，将他们随机分为两 组、进行为期8周的研究。两组都要进行每周5天、每天30分钟的运动。 拉伸运动组：运动包含全身21个拉伸练习，每个拉伸动作需要做两次，保持30秒，两次伸展之间休息15秒。 健走运动组：在户外步行道健走，需要达到一定心率；如天气恶劣则在室内跑步机走路。 两组饮食摄入、钠摄入没有太大差别。通过便携式血压计24小时监测，结果发现：与健走相比，拉伸运动组测量的血压都有较大幅度降低，与拉 伸相比，健走运动组的腰围减少更多，不过两组体重没有变化差异。 长期坚持才更有效 研究分析，虽然有氧运动是降低血压推荐的运动方式，但既往研究也发现拉伸可以降低动脉僵硬，改善血流，增加副交感神经系统激活，从而降 低血压。当肌肉拉伸时，血管也会拉伸。 拉伸还有哪些好处？ 有助于消除疲劳感 拉伸是 ...

作者 |Gary-alexander 我在今年2月就对Match集团（NASDAQ: MTCH）发出过看空预警，当时其股价还徘徊在33美元左右。此后该股持续走低，估值倍数倒是随之 改善。值得关注的是，新任CEO斯宾塞·拉斯科夫（互联网行业资深高管，曾任Zillow CEO、Hotwire创始人）正大刀阔斧推进改革，包括裁员 13%的大动作。虽然这些节流措施算得上利好，但付费用户大规模流失的残酷现实仍难以忽视。基于此，我维持对该股的"卖出"评级。 在我看来，问题的核心在于Match集团很可能继续让市场失望。需要提醒的是，该公司在2024年12月的投资者日上曾公布三年增长计划，提出到 2025财年实现4%-6%的年均复合收入增长率，并将调整后运营利润率目标定在39%。但现实情况是...... 在经济下行周期中，消费者对付费产品本就已产生抵触情绪，Match集团实现长期增长目标的难度进一步加大。需要指出的是，该公司4-6%的复 合年增长率目标，建立在Tinder恢复至个位数低段增长（1-3%）、Hinge实现约20%复合年增长率的基础之上。 但公司一季度在这两项指标上均未能达标，而Tinder的运营利润率下降，表明 ...

（原标题：信"心"心理问答｜90后家长心理破防：砸50万留学还是死磕高考？） 读者来信： 您好！我是一位正面临孩子教育抉择困境的家长。最近，我和孩子都陷入了纠结之中，不知道是让孩子 参加国内高考，还是选择去留学。这种焦虑情绪让我夜不能寐，这种焦虑和紧张也影响到了家庭的氛 围。 我家孩子目前是一名高二学生，学习成绩中等偏上，性格比较内向，但对新鲜事物充满好奇心。我属于 90 后家长，身边很多同龄人都在讨论孩子的教育路径，我也深受影响。据我了解， 90 后家长中有不少人 支持孩子留学，他们认为留学可以让孩子接触到更广阔的国际视野，培养独立自主的能力，还能在未来 的职业发展中有更多的机会。我也很认同这些观点，毕竟在全球化的时代，拥有国际化的背景无疑是一 种优势。 然而，我也跟不少家长聊过，这一阶段是孩子发展和成长的关键时期，孩子应该在国内接受系统的教 育，打下坚实的基础。国内高考作为国内教育的重要环节，有着严谨的体系和丰富的知识储备，能为孩 子未来的发展提供坚实的基础。而且，国内的教育资源也在不断优化，很多高校的学科建设已经达到了 国际先进水平。 您家孩子虽然性格内向，但好奇心旺盛，这样的孩子往往很有钻研精神。您可 ...

央视网消息：金属材料在长期使用过程中产生的疲劳失效是威胁重大工程安全的隐形杀手。经过多年攻关，我国科学家日前 破解了这一难题，成功让金属材料在保持高强度、高塑性的同时，还大幅提升了抗疲劳能力。这一成果北京时间4日凌晨在国际学 术期刊《科学》发表。新型金属材料，能给我们的生产生活带来哪些改变？ 在航空航天、跨海大桥等国之重器的运行中，金属材料长期使用中的疲劳失效是急需解决的隐形杀手。简单来说，就是金属 在长期受到同一种外力的情况下，会慢慢变形、出现裂纹，最后可能会突然断裂，这叫"棘轮损伤"。这种损伤就像是金属得了慢 性病，隐蔽又可怕。为了破解这一难题，科学家们提出了一种全新的结构设计思路，就像"拧麻花"一样，在金属材料内植入了亚 微米尺度的三维"防撞墙"。 中国科学院金属所研究员 卢磊：经过了上千万次拉压变形之后，它自己会在内部产生更多的小的"骨架"，这个"骨架"可以小 到几个纳米，两到三个纳米，然后密密麻麻的，这些"骨架"在变形的时候既可以来吸收你的变形的功，又可以来阻碍你的这种变 形的外力。正常情况下循环到一定程度这个金属就断了，但是它的寿命比传统的金属要提高好几个数量级。 科学家们带来的全新突破，让金属材 ...