分集介绍:这一讲给出了齐次微分方程组x'=Ax的解的一般公式,即用矩阵指数e^(At)表示基本矩阵X。同单个微分方程x'=ax中,a可以看作是1x1矩阵,其解是e^at。这里就是方程组在nxn矩阵上的推广,

发表于:2018-12-09 / 阅读(51) / 评论(0) 分类 麻省理工学院公开课:微分方程

以下段落是摘自新闻里的一些重要信息,并不是一个段落的听写。空内信息可在本新闻中全部找到,大家可以根据这些信息复述新闻。 一、泛听建议: 1、完整听一遍,掌握大意。 2、继续听,特

发表于:2018-12-26 / 阅读(44) / 评论(0) 分类 NPR边听边练

The Shanghai stock index went down 9% last Tuesday and then brought down European and American stock markets with it. Rumors that the Chinese government would impose a 20% capital gains tax encouraged a sell-off. A report by the US Commerce Departme

发表于:2018-12-30 / 阅读(84) / 评论(0) 分类 初级商务英语听力2007

客户户口 client account 客户身分规则【证监会】 Client Identity Rule【SFC】 客户服务器结构 client server architecture 客户协议书/合约 client's agreement 客户按金 clie

发表于:2019-01-03 / 阅读(95) / 评论(0) 分类 财会英语

Science and Technolgy. 科技。 Social status and health. 社会地位与健康。 Misery index. 贫困指数。 Low social status is bad for your health. Biologists are starting to understand why. 社会地位低对身体不好,生物学家开始理

发表于:2019-01-26 / 阅读(40) / 评论(0) 分类 经济学人科技系列

The Sinodependency index 中国依赖指数 Declaration of Chindependence 跨国企业对中国市场的独立宣言 For an American multinational, is exposure to China still a good thing? 对于美国的跨国企业来说,把命运寄托在中国市

发表于:2019-01-27 / 阅读(95) / 评论(0) 分类 经济学人财经系列

NEW YORK, April 2 (Xinhua) -- U.S. stocks bounced back on Tuesday from Monday's pullback, with both the Dow Jones Industrial Average index and SP 500 closing at all-time highs, bolstered by strong gains in health insurance companies. The blue-chip Do

发表于:2019-02-03 / 阅读(80) / 评论(0) 分类 英语新闻

It was a year ago that index provider MSCI contemplated including Chinese domestic-listed A shares in its emerging market indices. The Chinese market was charging ahead, with the Shanghai Composite index peaking on June 12, two days after MSCI opted

发表于:2019-02-04 / 阅读(55) / 评论(0) 分类 英语新闻

NEW YORK, May 19 (Xinhua) -- U.S. stocks ended narrowly mixed on Tuesday, with the Dow Jones Industrial Average eclipsing previous day's closing record, as April's housing data came out well above market consensus. The Dow inched up 13.51 points, or

发表于:2019-02-05 / 阅读(95) / 评论(0) 分类 英语新闻

Chinese authorities are taking another step toward opening up the capital markets to foreign investors. The Shanghai Stock Exchange and China Financial Futures Exchange have agreed to set up a joint venture with Deutsche Boerse. The new company, base

发表于:2019-02-06 / 阅读(77) / 评论(0) 分类 英语新闻

Prophet, a global brand and marketing consultancy, recently released a report on the most favored brands of Chinese consumers. 全球品牌和营销咨询公司博丰于日前发布了一个关于中国消费者最喜爱的品牌的报告。 Data sho

发表于:2019-02-08 / 阅读(49) / 评论(0) 分类 英语新闻

Science and technology 科学技术 Social status and health 社会地位与健康 Misery index 贫困指数 Low social status is bad for your health. Biologists are starting to understand why 社会地位低对身体不好,生物学家开始理解此

发表于:2019-02-16 / 阅读(45) / 评论(0) 分类 经济学人科技系列

Corporate political donations Lighten our darkness 公司政治献金拨云见日 There are big differences in what firms reveal about their political donations 政治献金信息披露因公司而异 IT IS not just the incestuous make-up of News Cor

发表于:2019-02-16 / 阅读(49) / 评论(0) 分类 经济学人商业系列

Finance and Economics 财经 The Big Mac Index: The All Meaty Dollar 巨无霸汉堡指数:强大的美元 Burgernomics gets to grips with a strong greenback. 汉堡经济学发现美元走强。 IT is perhaps not surprising that the worst-performi

发表于:2019-02-17 / 阅读(45) / 评论(0) 分类 经济学人财经系列

Economists think prices, like spilt ketchup, are sticky. They move only slowly as firms digest economic conditions. 经济学家认为价格就像溢出的番茄酱一样黏糊糊的。它们只会在公司消化经济状况时缓慢变动。 Financi

发表于:2019-02-17 / 阅读(52) / 评论(0) 分类 经济学人财经系列

The tech-heavy Nasdaq index has closed at a record high, surpassing a level it last reached in 2000 at the height of the dot com bubble. 以科技股为主的纳斯达克指数再创历史新高,超过了其2000年互联网泡沫的高峰期的水平

发表于:2019-02-17 / 阅读(45) / 评论(0) 分类 阅读空间

一份调查报告显示,中国经济最为发达的北京、上海、深圳、浙江等省市幸福感指数最低,2009年红火的地产业带来的房价飙升令很多家庭感到痛苦。此外,健康、情商、财商、家庭责任以及社

发表于:2019-02-18 / 阅读(42) / 评论(0) 分类 英语口语

7月28日,胡润研究院发布2015富豪消费价格指数,报告显示,富豪消费价格总水平比去年下降1.8%,这是九年来首次出现负增长。 请看《中国日报》报道: The Hurun Luxury Consumer Price Index, an annual

发表于:2019-02-18 / 阅读(65) / 评论(0) 分类 英文语法词汇

你真的不胖 If youre one of the legions of slim, fit and healthy people whose BMI (Body Mass Index) makes them technically overweight, this story will be music to your ears. A new test is about to launch called the ABSI. 很多人BMI指数(身体质

发表于:2019-02-25 / 阅读(78) / 评论(0) 分类 阅读空间

很多人BMI指数(身体质量指数)超重,实际上却健康苗条。如果你也是其中的一员的话,那么下面的这个新研究可能会让你觉得很中听。因为一种新的测试体重的指数诞生了。 If you're one of the l

发表于:2019-02-26 / 阅读(69) / 评论(0) 分类 雅思英语