The differences of these catalysts reactivity were related to their structures and the activity of lattice oxygen.

這一方面是因為氫的引入使表面的氧物種發(fā)生了變化，形成了活性更高的氧物種亚洲综合小说图片，另一方面是因為氫的引入加速了氧分子向晶格氧轉(zhuǎn)化久久综合色色。

A new method of controlling moving path in real-time for engineering animation is presented based on de Boer algorithm for B-spline construction.

本文引入一種新的實時控制工程動畫運動路徑的方法国内偷拍第一视频区，以構(gòu)造B樣條的德波爾算法為基礎(chǔ)，在初始驅(qū)動樣條路徑上進行節(jié)點插入的局部升階黄色毛片免费看永久一，生成新的插入節(jié)點u国内在线精品一区二区AV，并實時響應(yīng)控制參數(shù)的輸入v，將輸入?yún)?shù)節(jié)點與節(jié)點插入生成的節(jié)點形成一組控制節(jié)點用來控制樣條的偏移度日本人人操人人射高清DVD播放，然后引入關(guān)于時間t的線性函數(shù)的質(zhì)量權(quán)重Wk來控制路徑曲線的偏移量亚洲黄一级色视频。

Governmental procurement that introduces market competitive system into the repartition and use of finance capital, is an important means to manage public payment.

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A two-layer framework with particle swarms cooperative optimization and a mutation parameter is introduced by the QPSCO algorithm for larger searching scale and quicker convergence. Moreover I the residual sum of squares in least-square principle is introduced into the fitness function to enhance the fitting precision of the sensor position curve.

在QPSCO算法中，采用雙層的多粒子群協(xié)同優(yōu)化結(jié)構(gòu)成年欧美1313www色，同時引入參數(shù)變異策略别揉我奶头视频一区，在擴大搜索范圍的同時加快該算法收斂；將加權(quán)最小二乘法的誤差平方和引入適應(yīng)度函數(shù)中在线视频产自拍，以提高傳感器位置曲線的擬合精度黄色网站操一操，從而實現(xiàn)傳感器的優(yōu)化配置。

Both the normal semi-cloud model and the shift operator are introduced to that method to make sure that data partition in the method can reflect some information about the actual data distribution,to reduce the number of rules generated by the new method,and to increase the rules' fitness.

該方法采用"半正態(tài)云"作為基本云人人操人人爽人人浪，并引入位移因子亚洲欧美一级AA片，使基于數(shù)據(jù)的規(guī)則提取算法中的數(shù)據(jù)劃分能充分反映數(shù)據(jù)的實際分布，減少提取的規(guī)則數(shù)量探花自拍日韩视频在线，提高規(guī)則的推理精度黄频美女裸体；通過引入數(shù)據(jù)關(guān)鍵點及最佳分割點以保證規(guī)則庫的完備性。

Two special structural features of the sulfonium salt were proved to stabilize its corresponding ylide and depress the 2,3-sigma rearrangement. One is that there is a trimethylsilyl in the end of the allylic double band. This silicon atom can stabilize a α-carbon anion and the corresponding ylide. Another is that there is hydroxy group in the beta-position of sulfonium atom. The oxygen of this hydroxy group may stabilize the sulfonium cation.

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In the part of empirical analysis of Chinese IPO first-day return, the difference between existing study and this study is that we use principal components analysis to extract from five factors to construct investors'sentiment index, add it to controled varibles, on which we examine the influence of offering mechanism on IPO first-day return. Moreover, we gather statistics and compare the IPO holding return for lockup period between fixed-price-class offering method and bookbuilding-class offering method, as well as price range between Chinese A-share market and Hongkong stock market, which prvide comprehensive evidence to appraise Chinese IPO bookbuilding mechanism. 2. Compare to the existing literatures which consider discount or allocation, incentive allocation and discount are considered at the same time in optimal mechanism design in this dissertation, and the offering bottom price is introduced to the price range. We investigate the relationship between price range and allocation quantity, and obtain the optimal price range and allocation strategy so that the advantages of independent allocation are reflected. On the other hand, the disadvantages of independent allocation are reflected in the manipulation in case of no restriction on IPO allocation. To distinguish from the existing literatures, bookbuilding mechanism is introduced to the model. We study the allocation strategy adopted by the underwriter in the pooling equilibrium of manipulation. In addition, we analyze the incentive compatibility conditions to which the existence of pooling equilibrium should satisfy and examine some factors'impact on the existence of manipulation.3. In bookbuilding without independent IPO allocation, Chinese realistic IPO background is considered and the condition of bookbuilding and fixed-price hybrid offering is added. Divide bookbuilding and fixed-price hybrid offering into sequential hybrid and simultaneous hybrid, and point out that the key points of subscription strategy in the two kinds of hybrid are different. Through modeling and simulation we obtain the impact of institutional investors'subscription strategy on bookbuilding without independent IPO allocation, which fill the gap in related research. Moreover, in the part of IPO bookbuilding with over-allotment option, the pricing strategy is divided into hot-IPO strategy and weak-IPO strategy. Take into account the procedure of Chinese IPO with over-allotment option, it presents how the underwriter determines the pricing strategy and what effect it brings to offering price and issue size through modeling and simulation. Therefore, it is instructive as a complement to existing literatures.

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When talking about introducing market-making system, we should not only analyze the trading system itself, but also analyze the nature of stock and treasury Based on the analysis, the author brings forward some suggestions on introducing market-making system in China.

對證券市場引入做市商制度的討論91av免费，不僅要從做市商制度本身出發(fā)精品色哟哟一区二区，也應(yīng)從股票和政府債券的內(nèi)在特征差異分析入手，在此基礎(chǔ)上提出了一些引入和發(fā)展我國證券市場做市商制度的建議操操操操操操操网。

When processing the restrained conditions, we convert the restrained conditions into punish function and add it to fitness function which profits from the conventional method. We introduce the support vector machine to the selection operator, which increases the multiplicity of selection and increases the probability of the algorithm getting the overall optimal solution. Also, we use the adaptive probabilities of crossover and mutation in mixed GAs which enhances the efficiency of the algorithm. The result of tests about the system indicates that the improved genetic algorithm has more high convergence speed and better solution quality.

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Viticulture and wine-making of Vitis vinifera L.

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