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Results show that the best value of w is 7~10% and 5~7%, i is 0.08~0.2 A/cm^2 and 0.03~0.05 A/cm^2 respectively, during the electrolysis fluorination of pyridine and tributylamine; the addition of N-butyl mercaptan into the organic mixture can stabilize electrolysis process with its mass fraction 15~20% at best; impulse current polarization work status of low load is helpful to the electrolysis process and reduces corrosion rate of anode; electrolysis temperature is suitable at 0~20℃; electrobath can use electrolyte inner circulation structure, exterior circulation structure or blending structure.

结果表明：吡啶和N-三丁胺电解氟化的最佳值w分别为7%~10%和5%~7%，i分别为0.08~0.2A/平方公分和0.03~0.05A/平方公分；有机混合物中添加N-丁基硫醇可稳定电解过程，其质量分数最佳为15%~20%；采用低负荷的脉冲电流极化工况有利电解过程，降低阳极的腐蚀速度；电解温度0~20℃为宜；电解槽可采用电解液内循环、外循环结构，或其混合结构。

Our Firebox X family of unified threat management solutions provides the best combination of strong, reliable, multi-layered security with the best ease of use in its class.

WatchGuard公司Firebox X系列UTM产品和解决方案，融合了强壮的、可靠的、多层的安全特性，加之良好的易用性，使其在同类产品中出类拔萃。

In general, this paper includes several parts, shown as the following: The first part summarizes the background and outline of stock index future and introduce briefly its local status and CSI 300 stock index future contract. The second part has a retrospect of the main academic papers of both local or overseas, and also a discussion of relevant hedge strategies and models, to lay a solid theoretical foundation for the empirical analysis and test for the operation process of hedge in latter parts. The third part outlines the principle, key factors and real operation process of hedge. Moreover, it makes a empirical analysis on popular hedge models with HK Hang Seng index. In the end, it test the hedge effect of trading on IF0706, CSI 300 stock index future contract, with CCB select-growth securities fund as present underlying. The fourth and also the last part, explores how to define hedge ratio in china mainland market. It includes the stability test ofβfor local securities portfolio, adjustment of historicalβand best data length for estimation of historicalβ, etc. Also, the thesis makes some beneficial experiments on the definition of best data length for estimation of historicalβ, survey of fashion forβand variation for industryβs. Fortunately, it's got some meaningful results.

按照以上研究思路，本论文论述由以下几个部分构成：第一部分，简要概述股指期货产生的背景和基本情况，对国内股指期货进程和沪深300股指期货合约进行简单介绍；第二部分，回顾海内外股指期货避险研究的主要文献，讨论相关避险策略及避险模型，为后面套期保值策略如何有效运用的实证分析和检验提供理论基础和依据；第三部分，对套期保值的原理、关键因素及实际流程进行概述，并采用香港恒生指数对常用的几种避险模型进行实证分析，最后一揽子以建信优选成长股票型基金为现货标的，实际检验以沪深300股指期货模拟交易IF0706产品进行对冲时的套期保值效果；第四部分，探讨国内确定避险比率的过程，包括国内股票组合β值的稳定性检验、历史β值的修正及估计历史β值的最佳数据长度等，通过数据分析，本文在寻找估计β值的最佳数据长度和考察风格、行业β值的差异上做了较为有益的尝试，并得到了有助于现实操作的结果。

Ice Point Best Friend' and 'Best Friend' being its brand of men and women casual clothes series, the product is aimed to the youth of 15-35 years old.

公司主要生产"冰点好朋友"品牌男女时尚运动休闲系列服装产品，产品消费群体为 15-35 岁的青春一族。

The result indicates that the output power oscillates and weakens along with increasing input power,and its oscillation period depends on the distance between the medium and beam focal point.Limiter′s limiting ability will decrease if waist size of the incident Gaussian beam and the aperture size increase.With a fixed input power scope,medium′s best limiting position will move towards the focal point if waist size of Gaussian beam and the aperture size increase,but the best limiting position will change a lot with different input power scopes.

结果表明：限幅器的出射功率随入射功率的增加衰减振荡，其振荡周期取决于介质相对于光束焦点的位置；限幅器的限幅能力随入射光束腰半径和光阑孔径的变大而减弱；入射功率范围固定，入射光束腰半径和光阑孔径增大时，介质的最佳限幅位置向入射光束的焦点靠近，但是在某些入射功率范围内会存在多个最佳限幅位置；光限幅器的箝位输出功率随光阑线性透过率的增加存在线性增加和非线性增加两个不同区域，实际应用中应在线性增加区域确定光阑孔径的大小。

In this algorithm, the probability of a certain particle element assuming a value of 0 or 1 is in positive proportion to value 0 or 1 of this element in the current position of the particle, the historic best position it experienced, and the best point found by any member of its topological neighborhood; but in negative proportion to value of the former position of it.

在该算法中，每个粒子各元素在新位置取二元值0或1的概率正比例于其当前位置、其历史最优位置和其邻域内的历史最优位置的取值，而负比例于其前一个位置的取值。

The Call of the Wild is the first best seller of Jack London, one of the best novelists in the early twentieth-century America. It was this book that made its author famous in the republic of letters.

《荒野的呼唤》是二十世纪初美国著名作家杰克·伦敦的第一本最畅销的书，其作者因它而蜚声文坛。

In addition, the Sensé product line received a Utah Best of State Award this year in the personal-care/cosmetics category for its revolutionary self-preserving formulations. The Utah Best of State Awards are a recognition program that was created to acknowledge outstanding individuals, organizations, and businesses in Utah.

另外，也让您的顾客明了，Sensé研美护肤系列产品，今年以其专业的科研保质技术，荣获犹他州以生产最佳的个人护肤产品的杰出奖项，此奖项是颁发给犹他州内最杰出表现的个体、组织及商业机构。。

As I see it, what best makes Meizu stand out from the crowd is its full, unreserved, dedication to what it believes is the best thing to do.

在我看来，什么最好使魅族的立场，从人群是它的全部，毫无保留地奉献给它认为是最好的事情。

The best four single-factor components were determined according to the effects of different carbon and nitrogen sources, inorganic salts, water-material ratio on xylanase-producing observed in the single-factor test; and on the base of this test, the best combination of tested factors were confirmed through the orthogonal experiment and its zymology properties was also studied.

通过单因素试验观察了不同碳源、氮源、无机盐、水料比4种因素对产木聚糖酶的影响，确定了4种最佳的单因素成分；在单因素的基础上，再通过正交试验确定了所试因素的最佳组合，并对其粗酶的酶学性质进行了研究。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48