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The Stag Hunt Dilemma

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Beijing Review 2024年第33期67卷 24-24页

作者： liang xiao 不详

In his Discourse on the Origin and Basis of Inequality Among Men,*** Jean-Jacques Rousseau presented the famous"stag hunt game,"in which two hunters,who are not familiar with each other,go *** each can choose to hunt a hare or a *** a hare is easier and can be accomplished inde-pendently,but the reward is *** a stag is more difficult and requires the two to cooperate but the reward to each is higher.

关键词： lemma pendent accomplished

Chinese Economy,In All Fairness

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Beijing Review 2024年第3期67卷 26-26页

作者： liang xiao 不详

Entering the year of 2024,downbeat voices on the Chinese economy still seem to be the mainstream in the Western ***'s an undeniable fact that China's economy has faced *** July to September 2023,direct investment liabilities--a broad measure of foreign direct investment that includes foreign companies'retained earnings in China--recorded the first quarterly shortfall since China's foreign exchange regulator began compiling the data in 1998.

关键词： companies investment Economy

The Trappings of Fate?

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Beijing Review 2024年第18期67卷 24-24页

作者： liang xiao 不详

A ccording to the ancient Greek version of the world map from the fifth century B.C.,the outermost layer of the world was ocean,and in the center of the ocean was one large *** the middle of the continent,there was the Mediterranean *** continent was divided into three parts:Europa,Asia and Libya,which are now known as Europe,Asia and Africa.

关键词： continent ocean Sea.

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Lost on the Moon

Beijing Review 2024年第4期67卷 24-24页

作者： liang xiao 不详

Fifty-five years after the United States made its first historicMoon landing,nothing seems to be going right as it plans first crewed return to the lunar surface in the 21st *** Technology,developer of the Peregrine lunar lander,on January 19 announced that just 11 days after its launch,the spacecraft experienced a critical fuel leak,resulting in its *** from be-ing the first commercially-built *** landcr,its mission also represented the first *** expedition in over 50 years.

关键词： return lunar nothing

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Ho Ho... No?

Beijing Review 2024年第1期67卷 26-26页

作者： liang xiao 不详

Like clock work,every year around December 25,a heated debate has been taking over Chinese social media in the past half decade or *** hot topic:Should the Chinese celebrate Christmas or not?

关键词： heated Christmas debate

A Smaller Nuclear Arsenal Is Far From Enough

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Beijing Review 2024年第32期67卷 22-22页

作者： liang xiao 不详

On July 20,the National Nuclear Security Administration(NNSA)under the *** of Energy revealed the country's nuclear weapons stockpile,saying that from fiscal year 1994 to fiscal year 2023,the United States dismantled ... 详细信息

关键词： s. Small Nuclear

A Trade War's Hidden Battles

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Beijing Review 2024年第23期67卷 23-23页

作者： liang xiao 不详

As *** Joe Biden signed an executive order imposing new tariffs on Chinese goods,including electric vehicles(EVs),aluminum and advanced batteries,on May 14,he may not have wanted to recall the promise he made while ru... 详细信息

关键词： Trade tariff initiated

Has Biden Made Peace With TikTok?

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Beijing Review 2024年第9期67卷 21-21页

作者： liang xiao 不详

0n February 11,Joe Biden,President of the United States,became one of the more than 1 billion users of TikTok,the international short video platform owned by the Chinese company *** account was created just one year after the White House mandated all federal agencies remove the app from their devices and systems,citing"data security"concerns.

关键词： app Peace remove

磷灰石主、微量元素的偏最小二乘判别分析在斑岩型矿床中的应用

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矿物岩石地球化学通报 2024年第3期43卷 593-606页

作者：刘效良江小均汪殿钟朱经经中国科学院地球化学研究所矿床地球化学国家重点实验室贵阳550081 中国科学院大学资源与环境学院北京100049 昆明理工大学国土资源工程学院昆明650500

如何区分成矿和不成矿斑岩,以及斑岩型铜和钼矿床成矿岩浆存在何种差异一直是矿床学界关心的科学问题。本文选取不同类型(包括成矿斑岩、不成矿斑岩、含铜矿斑岩、含钼矿斑岩等)斑岩中的岩浆磷灰石作为研究对象,通过多元统计方法(PLS-DA... 详细信息

如何区分成矿和不成矿斑岩,以及斑岩型铜和钼矿床成矿岩浆存在何种差异一直是矿床学界关心的科学问题。本文选取不同类型(包括成矿斑岩、不成矿斑岩、含铜矿斑岩、含钼矿斑岩等)斑岩中的岩浆磷灰石作为研究对象,通过多元统计方法(PLS-DA)对其进行聚类分析,尝试通过磷灰石的元素特征区分出成矿与不成矿斑岩以及形成不同矿种的斑岩,进而为副矿物找矿提供理论依据与技术支撑。通过PLS-DA模型的建立与讨论分析,发现根据岩浆磷灰石的Cl、SO_(3)、La、Ce、Eu、Sr、Y、Yb、Th等元素含量的差异,指示成矿斑岩的岩浆相比于不成矿斑岩的岩浆具有较高的氧逸度和水含量,且斑岩铜矿相比于斑岩钼矿具有相对高的岩浆氧逸度和较低的岩浆演化程度。

关键词：斑岩型铜和钼矿床岩浆磷灰石主、微量元素多元统计分析 PLS-DA模型