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For low molar ratios of Al/Zr, a hypsochromic shift of the initial catalyst absorption band, corresponding to the monomethylation of the catalyst, was observed. Further addition of AlEt2Cl was accompanied by a continuous bathochromic shift of the maximal wavelength corresponding to the formation of more dissociated ionic active species. Then, there would be a coordination of monomer to the ionic active species.

结果表明,无论是AlEt_2Cl还是MAO,少量的助催化剂首先使催化剂发生单烷基化反应,主催化剂金属中心的最大吸收峰波长发生蓝移,而当助催化剂量进一步增加时,金属中心的最大吸收峰波长红移,单烷基取代的催化剂被大量的助催化剂夺去电子成为缺电子的阳离子活性中心,以便烯烃单体的配位插入。

The case-based reasoning system mainly use object-oriented method, case expression is based on the exploitation a property of the case,use value vicinity to calculate the similarity coefficients, exert two learning way to modify the case, dividedly save the case parameter and the case model. Give the method to solve the order optimization problem.

对最大运能配载方案数据库的管理;对订单配载优化事例库的特征提取、分层存储表示和储存来有效管理大量订单配载优化和轿运车最大运能事例;利用有效的事例搜索技术快速可靠的搜索出与订单相匹配的事例,按一定的规则对这些事例进行重新组合优化,从而给出订单优化的解决方案。

It is a nonlinear system and it is not necessary to assume that wavelet is minimum phase. Wavelets and reflection coefficients can be separated in homomorphic deconvolution; however, how to choose the optimum wavelet needs a lot of manual time and processing experiences.

它是一种非线性系统,对地震子波不做最小相位的假设条件,只需能分离出地震子波和反射系数,在分离出的地震子波当中,如何选取最合适的地震子波是一个需要花费大量的人工时间和需要一定的经验。

As a differential detection is used between the intercarrier, the proposed algorithm overcome the high sensitivity to timing error of conventional algorithm and is robust to multi-path. The effect of sample frequency offset can't be ignored in a continuous OFDM system of a large number of subcarriers. The estimation precision of the conventional algorithm is low and the realization is complex. A joint estimation of sample frequency offset and fine frequency offset based on difference operation is proposed. As averaging use a large number of samples in a maximum likelihood algorithm, the estimation precision is very high. The use of difference operation cancel the effect of carrier frequency offset, and the proposed sampling frequency estimation algorithm is robust to carrier frequency offset.

最后,本文对连续系统中的采样频率和载波频率精同步技术进行较为深入的研究,由于子载波数目大的连续OFDM传输系统中,采样频率偏差不可忽视,以往的采样频率估计方法精度低、实现复杂,因此本文提出了一种基于差分处理的采样频率偏差和精载波频率偏差联合估计算法,利用了最大似然算法进行采样频率偏差的估计,由于采用了差分处理方法,消除了载波频率偏差对采样频率偏差估计的影响,采用的最大似然算法对大量样点进行平均化处理,所以,相对以往算法,提出的联合算法估计精度高,而且采样频率偏差估计对载波频率偏差具有鲁棒性。

As the simplest and optimum equipment which provides high-quality oilless compressed air, it saves complicated oil filtering and treatment equipment, thus saving a lot of equipment expenditure and maintenance cost.

作为提供高品质无油压缩空气是最简单、最理想的设备,它省去了繁复的油过滤处理设备,节省了大量设备开支和维护费用。

The controls capacity progress of the giant and unparalleled information that clear mankind is in the phylogeny card of the network to arise to oneself place, when much information is being delivered through the network, its most essential the worthiest thing by cover, the lack fidelity information of redundant jackknife was full of whole and fictitious space.

网络的发展史证明了人类在对自身所产生的庞大无匹的信息的控制能力的进步,大量的信息在通过网络传递时,其最本质的最有价值的东西被掩蔽了,冗余的重叠的失真的信息充斥了整个虚拟空间。

Matsuyama et al used calcium phosphate cement, which polymerizes at lower temperatures.37,38 Results were good in terms of pain relief (8.6 preoperatively and 2 postoperatively on the visual analog scale), neurologic recovery and kyphosis restoration (vertebral height was restored to 68%, compared to 41% preoperatively).37,38 This combination of maximal/minimal surgical treatment has value especially in neurologically compromised patients with indication for surgery, who cannot tolerate long procedures and large blood loss due to medical comorbidities.

Matsuyama等人使用磷酸钙骨水泥,其硬化反应温度较低[37,38],结果表明疼痛缓解良好(视觉模拟评分从术前的8.6分减至术后的2分),神经功能恢复和后凸畸形矫正良好(椎体高度从术前的41%恢复至术后的68 %)[37,38],这个&最大/最小&的手术组合治疗方法,尤其适合伴有神经症状而不能耐受长时间的手术和大量失血的患者。

For mechanical capability of busway, the magneto-structure coupling analysis is used and computation program is compiled by using apdl language of ANSYS in this paper, then the maximum dynamical force and displacement in X direction can be obtained under the condition of three phases short circuit to earth.

对低压母线槽的力学性能,本文运用了磁-结构耦合分析的方法,大量运用ANSYS的apdl语言,编制了计算程序,得出母线槽在三相对地短路情况下所受的最大电动力及X方向的最大位移,形成了磁-结构耦合分析模块。

Results The morphology of endocrine cells in digestive tract was of multiplicity.The density of 5-HT cells was the highest in the colon,but not found in the esophagus,cardia gastric and cecum.The results showed that SS cells were distributed in the pylorus mostly,but not detected in the cardia,colon,cecum and rectum.Gas positive cells were the most in the duodenums,while in the esophagus and cardia was not discovered.In the cardia VIP cells were maximum,but in the esophagus,duodenums and ileum did not appear.

结果 消化道中4种免疫阳性细胞形态多样,大多呈椭圆形和锥体形。5-HT阳性细胞数量以结肠最多,空肠和回肠次之,幽门腺区、十二指肠和直肠较少,食管、贲门腺区、胃底腺区和盲肠中未见;SS阳性细胞在幽门腺区数量最多,贲门腺区、结肠、盲肠和直肠中未见;Gas阳性细胞大量出现于十二指肠,在食管、贲门腺区和盲肠未见;除个别器官未见VIP阳性细胞外,在消化道的其余各段均有分布。

Have a search chief expresses related the enterprise, when indication search result, the result of the wrongest upper part is sure the most charming, its change showing ability is relative taller, but analyse with the behavior of the user, if ad is placed in left search result, can cause disable in great quantities click.

有搜索企业相关负责人表示,在显示搜索结果时,最左上方的结果无疑最有吸引力,其变现的能力相对较高,但是以用户的行为分析,如果在左侧的搜索结果中放置广告,会造成大量的无效点击。

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推荐网络例句

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石!

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻,也许正是在通往天国的路上,我体验着这白色的晕旋。

When you click Save, you save the file to the host′s hard disk or server, not to your own machine.

单击"保存"会将文件保存到主持人的硬盘或服务器上,而不是您自己的计算机上。