蓝精灵

New advances in lunar soil research offer scientific evidence to unravel mystery of moon’s 'two faces'_我的网站

你的名字

一 |     等了许久,台当局近日终于盼来首批两架F-16V战机,编号6727和6728从美国起飞,预计23日左右落地台湾。    

Lunar soil Photo: IC
    Lunar soil Photo: IC
Chinese scientists have made new progress in the study of lunar soil samples returned by the Chang'e-6 mission, providing fresh evidence to the striking differences between the moon's near and far sides, which have long puzzled scientists.
Because the moon is tidally locked to Earth, its rotation period matches its orbital period, meaning the same side always faces Earth. The moon's near side features vast dark basaltic plains known as lunar maria, while its far side is dominated by bright highlands with far fewer maria, creating a striking contrast between the two sides. Why does the moon have such "two faces"?
Scientists studying the moon's early formation and evolution have long used the lunar magma ocean model as a basic framework. Under the model, the chemical and isotopic characteristics of different types of lunar magma can be explained by the mixing of different components in varying proportions after the magma ocean cooled, Guangming Daily reported on Saturday. 
However, previous lunar samples were collected only from the moon's near side, while significant differences exist between the near and far sides in their topography, composition and internal structure.
Against this backdrop, the research team from Institute of Geology from Chinese Academy of Geologist Sciences studied feldspathic impact-melt rocks in lunar soil samples returned by the Chang'e-6 mission. Using China's first independently developed ion probe system, researchers conducted a comprehensive analysis to test the lunar magma ocean model and examine how large impacts reshaped reservoirs in the lunar crust and mantle.
Through high-precision analyses, the team identified key clues to the moon's evolutionary history, suggesting that the stark differences between its near and far sides may be linked to the ancient giant impact that formed the South Pole-Aitken Basin.
The study found that the massive impact continued to profoundly reshape the lunar crust and upper mantle after the lunar magma ocean had solidified, fundamentally altering the material composition of parts of the moon's far side.
The findings add to the traditional lunar magma ocean model, suggesting that the formation and preservation of the moon's crustal and mantle reservoirs may have varied significantly from region to region and cannot be fully explained by a single, uniform model of primordial magma-ocean differentiation.
The research provides new scientific evidence for understanding the differences between the moon's near and far sides, while offering fresh insights into the moon's complex evolutionary history, according to Guangming Daily. 
Global Times
    2019年台防务部门以“凤翔项目”为代号,向美国下单66架F-16V,总经费2472亿元新台币。

二 |     按原计划,2023年就该先交单双座各一架,2024年起每批交4到5架,2026年全部交完。结果因为疫情、供应链、美方产能排挤等原因,一拖再拖。    直到今年6月,美方才交付了1架编号6831的F-16V,还留在美国没飞回来。现在这2架如果月底前能到,算是这笔订单真正意义上第一次“落地交付”。    而按照美方最新说法,剩下的63架要拖到2027、2028年。台湾的钱早就拨了,飞机却迟迟不来,这不就是典型的“先收款、后排队”?        而更让岛内难以接受的是,特朗普埋了颗“大雷”:这两架飞机,很可能没装电子战系统。    F-16V的核心升级在航电和武器整合:有源相控阵雷达、新型任务计算机、电子战套件、新型导弹兼容能力。    台海方向,解放军歼-16D电子战机、地面干扰站和舰载电子战平台已经形成体系,干扰强度能覆盖整个海峡。没有电子战能力的F-16V,雷达再远也容易在干扰下丢失目标,连被动告警和干扰投放都受限。    台湾买的是整机,美方宣传的作战效能全建立在完整电子战套件上,结果到货缺关键模块,等于花整机钱买半成品。

三 |     而且台湾现有140架F-16A/B升级到V标准时,可是装了AN/ALQ-211(V)9电子战套件的。新买的飞机反而不如老飞机?确实还挺离谱的。    保加利亚第一批8架早就飞回去执行任务了,台湾交钱比人家早,到货比人家慢,配置比人家低。        为什么美国敢这么交?因为台湾走的是美国对外军售渠道,钱先给美国政府,美国政府再找厂商,台湾连直接合同主体资格都没有。

四 | 不能起诉违约,不能自己验收,配置由美方单方面解释。    电子战系统敏感?可以,但台湾付的是整机钱,到货少个关键模块,后续再加装还得再走一轮军售、再付一笔钱、再等一个周期。等补齐那天,这些F-16V可能已经在机库吃灰好几年。    民进党当局不敢公开验收标准,只能配合美方说“后续规划”。因为合同里根本没有硬性交付条款,台湾提前拨付的预算已经进了美国账户,美方拿到钱却不交货,台湾没有任何反制手段。    赖清德当局的“美制武器抵台”宣传,在岛内越来越像过期的止痛药,开始有人不买账了。    前“深绿”媒体人彭文正公开说,要不惜代价推动两岸和平统一。这个信号比两架F-16V落地更值得关注。        彭文正长期在绿营媒体圈,过去嗓门没少喊“抗中保台”,现在公开转向,说明岛内一部分人开始重新思考:美国连几十架战斗机都拖成交付烂尾,连电子战系统都能掏走,真到台海有事那天,美军会为了台湾砸锅卖铁吗?    台湾每年军购预算越堆越高,换来的装备缩水、交付跳票、战力真空。解放军的封控能力一年一个台阶,台湾花大价钱买来的武器在体系面前连入门券都拿不到。    岛内民众看到这一点,民进党那套“美国会保护你”的说法自然越来越没可信度。    国台办发言人朱凤莲8月19日说得很清楚:民进党当局顽固坚持“台独”分裂立场,变本加厉挥霍台湾民众血汗钱,在穷兵黩武的邪路上狂奔,不仅挤占岛内民生社会福利开支,更将台湾一步步带向灾难深渊。

五 |     解放军在台海的制空权、制电磁权已经形成体系,几架缺装电子战系统的F-16V改变不了任何态势。台湾对美军购换不来安全,只能换来不断推迟的时间表和缩水的装备。        两架没装电子战系统的F-16V不会改变台海力量结构,却足够刺激大陆采取更严厉的反制。

六 | 台湾继续在这条路上走,成本只会越来越高。    台湾每拿到一件武器,就把自己往最前线推一步。岛内一些人在媒体上开始讲“和平统一”“避战谋和”,不是脑子突然转过弯,而是对抗成本实实在在压到了自己头上。    从减配到延宕,从彭文正转向到民间质疑,这条线其实很清楚:台湾把安全寄托在一个连合同都不按承诺执行的军售关系上,结果只会是交付越拖越久、装备越交越水、风险越堆越高。    赖清德当局如果继续拿这两架“半成品”战机做政治秀,后面的坏消息不会停。花钱买不来安全,只能买来一张长期被套牢的账单。台湾这笔账,到底还要还到什么时候?返回,查看更多

Current article:http://22op.foujiongwenruapoumeizhan.buzz/list_6hp/o1rhnuf.html

Published on:00:06:10


美姐

饥饿游戏_Active users

51job_Hottest this week