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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。

For the arch dam which reservoir has no suitable breach to build lasher and has mass flood discharge, opening large orifice for flood discharge has great advantage.

对于库区无适宜垭口可兴建泄洪道，而泄洪量又较大的拱坝工程，在坝身中开设大孔口泄洪具有显著的优越性。

Accordingly lateral stability of arch bridges is getting a more and more serious problem.

因此，拱桥的整体稳定性就成为愈来愈突出的问题。

But it is very difficult to make the plunging jet from high arch dams diffuse laterally in canyon area.

对于在峡谷地区修建的高拱坝，由于地形的限制，使水舌横向扩散变得异常困难。

An arbor or arch made of latticework.

那个核桃啪的一声裂开了。

Xu Feng arch of Yi Yi, said laughingly: The book is a record of freedom of speech and thought.

徐冯拱了一揖，笑笑说：书是记载言论和思想的。

Lechery was formed in 2004 when the current line-up was completed and Martin Bengtsson left Arch Enemy and Armegeddon.

Lechery成立于2004年，目前的阵容已经完成和马丁本特松左拱敌人和Armegeddon 。

Our products are widely used for thousand kinds of industries,such as camping tent, golf bag, stack, sandbeach, kite, windmill and other leisure products; Aeromodelling,aeroplane toys, car toys, arch, arrow, body-building loop, power twister, baseball exercise equipment and other sports goods; Mosquito net, Rome window curtain pole, bag, bedstead, chair, desk, floor board of lavatory and other house fittings; Blower machine cover, anti-corrosion table, work shelf, anti-corrosion cover and other petrochemicals; Electrician ladder,cable bracket,wire traction stick, switch bolt, flex pole and other electric products; Mast, displaying stand and other advertising equipment; Refrigerator Wagon, automobile window curtain, 3K carbon fiber ornaments and other automobile improving products; Leister, yacht parts, rudder, quant, sail, and other ship products;Signpost, expressway shield boards and other road establishment; Sapling support post, farm greenhouse shelf and other agricultral products; they are also widely used in the field of CT bed and textile industry, and so on.

我们的产品广泛的应用于数千种类行业，如：野营帐篷、高尔夫球网、枪架、沙滩椅、风筝、风车等休闲用品；航模、玩具飞机、玩具汽车、弓背、箭、健身圈、臂力棒、棒球练习器等多种体育用品；蚊帐、罗马窗帘杆、箱包、床头、床架、桌椅、浴室地板等家居用品；风机罩、机器外罩、防腐地台、工作架子、防腐罩等石油化工工业用品；电工梯、电缆托架、电线牵引棒、电线分拨杆、开关插销、伸缩杆等电工电器用品；旗杆、展示架等广告器材；冷藏车箱、汽车窗帘、3K 碳纤装饰件等汽车改装精品；鱼叉、游艇部件、船舵船桨、风帆等海洋船舶用品；路标、高速公路护板等道路设施；树苗支撑杆、农用大棚架等农用设施、医疗床；纺织业；等等举不胜举的用途。

Some of the most popular ones are the Stars and Stripes, the Great Seal of the USA, the bald eagle, the Washington Monument, the Lincoln Memorial, the US Capitol, the White House, Independence Hall, the Liberty Bell, the Statue of Liberty, the Gateway Arch (in St. Louis, Missouri), Mount Rushmore (carved on a mountain in South Dakota), the Alamo, The Star Spangled Banner, The Pledge of Allegiance, Yankee Doodle , Uncle Sam (a cartoon figure designed by Thomas Nast), the Vietnam Veterans Memorial, the Jefferson Memorial, Gettysburg, Monticello, Mount Vernon, the Golden Gate Bridge, the World War 2 Memorial, and many others.

最流行的一些星条旗，在美国，秃鹰，大密封，华盛顿纪念碑，林肯纪念堂，美国国会，白宫，独立厅，自由钟，自由女神像，在大拱门，拉什莫尔山，阿拉莫，美国国歌，忠，扬基歌，山姆大叔承诺（卡通人物的托马斯纳斯特设计）中，越战纪念碑，杰佛逊纪念馆，葛底斯堡，蒙蒂塞洛，弗农山，金门大桥，世界2战争纪念馆，等等。

Systemic studies environment temperature how to influence construction control, finds out linear regularity and function formula of the arch rib, selects optimal closure time, then fully meets requirements of closure precision and linear. By testing a lot of data on temperature and strain and adopting least squares collocation, this dissertation deduces the strain calculate formula that is amended by joining temperature factor, then improves accuracy of stresses testing data.

系统地研究外界温度变化对施工监控的影响，找出了拱肋变化的线性规律和函数式，选择出最佳合龙时机，保证了拱肋的合龙精度和线形要求；测试了大量温度与应力对应关系的实验数据，采用最小二乘拟合推估法，推导出温度修正后的应变计算公式，从而提高了应力测试数据的准确性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。