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Since Leptokurtosis, skewness and fat-tail are always used to depict market risk, this paper introduces the improved Laplace distribution to risk management of stock portfolio. Empirical results show, improved Laplace distribution and asymmetric Laplace distribution are similar for estimating Leptokurtosis, while improved Laplace distribution is better for estimating skewness.In order to analyze the correlation between return distribution and volatility, the thesis uses ARCH-M Models to simulate the return series of China's Stock Market and developed markets ao as to discover the relation between investment return and time-varying risk.

对尖峰、厚尾、偏态的刻画有助于正确估计市场风险,本文将改进型Laplace分布引入到股票组合的风险管理中,实证结果发现,改进型Laplace分布和非对称Laplace分布对尖峰、厚尾的刻画效果接近;而非对称Laplace分布对负偏性考察不足,改进型Laplace分布的拟合结果能够准确地反映股指收益的负偏态,这也正是改进型Laplace分布相对于传统的非对称Laplace分布的优势所在。

"There was at least five inches of this gray, pasty, dusty drywall soot on the ground as well as a thickness of it in the air."

地面上足足有五英寸厚的墙灰,灰色的、糊状的灰尘,在空气中也有这么厚的一层。

On the background of collision between India plate and Eurasia plate and uplifting of Tibet, the viscosity lower crustal flow induced crust thicken extensively, and driven upper middleup crust break into some big and small subblocks. The continental deformation features in SYR, including remotion of rigid subblock through the movement of huge slip faults and extensive crustal thickening, are not fit "Crustal thickening" mode or "Continental extrusion" mode.

川滇地区的大陆变形特征既存在广泛的地壳增厚现象,同时在下地壳塑性流动的驱动下,中、上地壳破碎成大小不一的块体,变形特征表现出整体刚性,因而不能简单地套用"地壳增厚"或"大陆逃逸"模式。

When Li 19 years old married gives Hangzhou's Huang Zi to be thick, at that time, the grandmother and father-in-law mothers-in-law were in good health, Li expressed feelings to the elder to be filial piety with all one's heart, in every possible way waited on the marquis; But Hangzhou's custom is very regards men as superior to women, because the Li first three viviparities all are the girls, these elders are very disappointed, thick has also produced discontented meaning including the man to the wife.

李氏十九岁时嫁给了杭州的黄子厚,当时,祖母和公公婆婆都健在,李氏对长辈尽心尽意地孝敬,无微不至地侍侯;但杭州的风俗很是重男轻女,由于李氏头三胎生的全是女孩,这些长辈就十分失望,连丈夫子厚也对妻子产生了不满之意。

for carrying out a small physical volume and high reliability of the motor driving and control,by using hip4081 chip and aln hybrid integrated technology,a hybrid integrated technology h bridge circuit based on hip4081 is designed to control bidirectional circumrotation and speed regulation of the motor.by practical application,the bidirectional circumrotation/speed adjustment of motor are realized safely and reliably.the products has a small physical volume,fast heat transmission,high efficiency and can operate properly in severe environment.it can enhance the reliability of the drive circuit and the system,and adapt to both military and commercial usage.

摘 要:为了实现小体积、高可靠的电机驱动与控制,利用hip4081专用芯片和aln厚膜混合集成技术,设计一种基于hip4081的厚膜h桥电机驱动电路,完成了h桥式驱动电路对电机双向转动和调速的控制。经实际应用,该电路不仅安全可靠地实现了电机的双向转动和调速功能,且产品体积小,导热性能好,效率高;还能在恶劣的使用环境下安全工作,提高了驱动电路和系统的可靠性,适合军、民两用。

In this thesis, tentative research was carried out that pyrogenation of fire retardant coating was analyzed: the heat-resistant effect of it would be weaken when the temperature was between 200℃and 400℃.

本课题尝试性地对SWH室外厚型钢结构防火涂料在高温试验的基础上进行了热重分析,结果表明:在200℃~400℃期间,SWH室外厚型钢结构防火涂料的阻热性能减弱。

In distal lateral subungual onychomycosis, the nail plate is thick with a cloudy appearance, the nail bed underneath the nail thickens and hardens, and the nail separates from the bed underneath.

在远端外侧甲下灰指甲,指甲厚钢板是一个多云外观,下方的指甲变厚变硬和,以及来自于地底下钉(onycholysis床分离)。

China's rulers aren't like the British masters of colonial India, and the Dalai Lama's Gandhiesque nonviolent struggle won't give them twinges of conscience, leading to Tibet's freedom.

那股厚颜力量不像英国殖民地印度一样,他的甘地主义并没有给那股厚颜力量带来一些阵痛和反思,并引导那个地区走入真正的自由。

I was put into a jail once on this account, for one night: and, as I stood considering the walls of solid stone, two or three feet thick, the door of wood and iron, a foot thick, and the iron grating which strained the light, I could not help being struck with the foolishness of that institution which treated me as if I were mere flesh and blood and bones, to be locked up.

我还一度为此进过监狱,关了一夜。当我站在牢房里,打量着牢固的石壁,那石壁足有二、三尺厚,铁木结构的门有一尺厚,还有那滤光的铁栅欗。我不由地对当局的愚昧颇有感独。他们对待我,就好像我不过是可以禁锢起来的血肉之躯。

I was put into a jail once on this account, for one night: and, as I stood considering the walls of solid stone, two or three feet thick, the door of wood and iron, a foot thick, and the iron grating which strained the light, I could not help being struck with the foolishness of that institution which treated me as if I were mere flesh and blood and bones, to be locked up.

我还一度爲此进过监狱,关了一夜。当我站在牢房里,打量着牢固的石壁,那石壁足有二、三尺厚,铁木结构的门有一尺厚,还有那滤光的铁栅欗。我不由地对当局的愚昧颇有感独。他们对待我,就好像我不过是可以禁锢起来的血肉之躯。

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