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Interpolating trigonometric polynomial parametric curves with C~2 (or G~1) continuity can be automatically generated without having to solve any system of equations or do any iterative computation. Then, the convexity of the constructed curves can be guaranteed by the appropriate value of the shape parameter.

在无需反求方程组、迭代计算和最求解的前提下,即可产生插给定点列的C~2或G~1连续的一族三角多项式样条曲线;进一步研究了该类曲线的保凸性,得到插曲线保凸时形状参数的取范围。

Stack will be the first to use infix form of the formula into the form of the suffix and then form the basis of the suffix from the beginning of leaf nodes corresponding binary tree structure Finally after by traversal of the tree, and the value of the subtree, that is, for every arrival a node, the value of its sub-tree has been calculated, when the reach the root node, the obtained value is the formula of true value.

首先利用堆栈将中缀形式的公式变为后缀形式;然后根据后缀形式,从叶结点开始构造相应的二叉树;最后按后序遍历该树,求各子树之,即每到达一个结点,其子树之已经计算出来,当到达根结点时,求得的就是公式之真

In "Truth Function", the paper, comparing with 2-vaued logic, briefs the quantity of truth function of 3-valued logic and how to calculate it.

在"真函项"中,在与二逻辑的比较下,文章介绍了三逻辑的真函项的数目及计算方法。

The results from an example showed that the unbiased estimate of error variance could be obtained so that polygenic variance and polygenic heritability could not be underestimated. Moreover, the AIC values by using the average of two replications were less than that by using the observations of a replication.

在试验设计为重复内分组随机区组设计时,通过甘蓝型油菜初花期的遗传分析表明:这种方案的试验误差方差估计无偏性好,可避免多基因方差和多基因遗传率被低估;重复观测平均数的分离分析的AIC低于利用单一重复资料的AIC

Seepage velocity smoothly change from a steady value to a new steady value, the ratio of the new steady value over the original steady value might increase hundreds of thousand times or even more, but it is always finite.(3)Water-inrush goes with the failure of rock strata, but seepage velocity can not increase unendingly, so seepage flow cant be unstable.

研究表明:由于非Darcy流β因子恒为正,渗流系统总是稳定的;当渗透特性随时间变化时,渗流速度从一稳定平滑地过渡到一新的稳定,新的稳定与原稳定之比可以增大到几万至几百万倍,但是总是有限的;突水是岩层结构破裂引起的渗流速度快速或急剧变化,但渗流速度不可能无止境地增大,即渗流不可能失稳。

12H treatment group compared with 12h model group: the level of SOD, MDA of the Gardenoside group is no different with the model group; the level of the SOD of the Baical in group increase and the level of MDA is no different; the level of SOD of the Concha Margatitifera Usta is no different and the MDA of it decreased than the model; the level of SOD of the Cholic Acid group increased and the level of MDA decreased; the level of SOD of the Hefang Group increased and the level of MDA of it decreased than the model group.

考虑nNos可能只是参与缺血早期的神经毒性作用。到缺血24小时这一时程已经减低或耗竭。大鼠局灶性脑缺血12小时模型组缺血脑组织P53光密度含量较正常组明显增高(p<0.01)。珍珠母治疗脑缺血12小时组缺血脑组织P53光密度较缺血12小时模型组明显降低。胆酸治疗脑缺血12小时组缺血脑组织P53光密度较缺血12小时模型组明显降低(p<0.05)。栀子苷治疗脑缺血12小时组缺血脑组织P53光密度较缺血12小时模型组明显降低(p<0.05)。

Where the whole or any part of the goods or merchandise insured has been delivered damaged at its destination, the measure of indemnity is such proportion of the sum fixed by the policy in the case of the valued policy, or of the insurable value in the case of an unvalued policy, as the difference between the gross sound and damaged values at the place of arrival bears to the gross sound value

如果被保险货物或商品的全部或者一部分以受损状态运抵目的地,赔偿范围以完好毛与受损价的差额占完好毛的比例计算,在定保险单情况下,是保险单确定的金额的该比例部分,或者,在不定保险单情况下,是可保价的该比例部分

In this dissertation, InGaAs/InGaAsP/InP MQW microdisk laser and its characterization were presented. Some conclusions are as following: the characteristics of lasing threshold was discussed by using rate equation. The dependent relations between threshold and cavity volume, spontaneous emission coupling efficiency β were investigated. The whispering gallery mode and spontaneous emission in a microdisk geometry were then studied. Almost all spontaneous emission was coupled into the lowest order TE mode when the normalized thickness of photonics well was between 0.15 and 0.5. The design principle and device process of InGaAs/InGaAsP/InP MQW microdisk laser were presented. The microdisk lasers with the diameter of 8μm, 4. 5μm and 2μm were succesfully fabricated by using etching techniques. The pulse lasing thresholds for the microdisk with the diameter of 8μm and 4. 5μm were 170μW and 15μW, a record results compared with the published in the literature. The cw lasing threshold for a 2-μm-diameter microdisk was only a few μW. We haven't found similar report up to now. To solve the problem of directional output in a microdisk laser, the power coupling efficiency in a double disk geometry was investigated with the theory of waveguide mode couple. A new structure of electrically pumped microdisk laser with output waveguide was designed, making a foundation for the practical use of microdisk laser.

本文主要研究InGaAs/InGaAsP/InP多量子阱半导体碟型激光器的研制和特性表征,并取得如下结果:利用速率方程理论讨论了激光器激射阈的特性,分析了阈与腔体积和自发发射耦合系数β之间的关系;讨论了微碟光子阱结构中的自发发射特性和微碟中WGM模式特性;光子阱结构在其归一化厚度在0.15-0.5之间时,几乎全部自发发射进入到最低阶TE模式中;研究了InGaAs/InGaAsP/InP多量子阱微碟激光器的结构设计原理和器件的制备工艺;利用刻蚀方法成功制备出直径分别为8μm、4.5μm、2μm的碟型微腔激光器;直径8μm和4.5μm的微碟脉冲光泵浦激射阈分别为170μW、15μW,是目前所见文献报导中比较低的;直径2μm的微碟连续光泵浦激射阈仅几μW,目前尚未见到达到类似结果的研究报导;为解决微碟激光器激射光定向引出的问题,通过波导耦合模理论分析了双层碟之间功率耦合效率;据此设计了新型带耦合输出波导的电泵浦微腔激光器,为进一步研制可实用的电泵浦微腔激光器打下基础。

The high inoculum levels increased the bacterial growth and shorten the time for antifungal substance production. The powder of rice, soybean cake, yeast, and wheat bran, CaCO3 and KH2PO4 were better nutrients for the bacteria growth and antifungal substance production. There were two stages during the fermentation process at 30℃. The growth of bacteria increased at the first 24 h and the pH of broth rose, but no antifungal activity was observed until 41 h later and reached to the highest level at 114 h.

基本营养物质的初步筛选试验证明:大米粉、豆饼粉、麦麸、酵母粉和CaCO3及KH2PO4是发酵培养基中最佳的营养物质,可满足抗菌物质产生对碳、氮和矿物质的营养需求。B-903的发酵过程可分为两个阶段:在30℃下,24小时内,细菌数量达最大,pH由低向高变化,但此阶段检测不出抗菌物质的活性;第二阶段,培养41小时后,抗菌物质活性开始显露,至112小时后达最大,pH也逐渐由高变低。

Results Positive rate of Amsel was 28%, one step sialidase was 34%, Gram-stain was 30% and amines was 24%. Using Amsel as criterion, the sensitivity of one step sialidase and amines was 92.9% and 71.4%; specificity was 88.9% and 94.4%; positive predictive value was 76.5% and 83.3% negative predictive value was 97% and 89.5%, using Gram-stain method as criterion, the sensitivity of one step sialidase and amines was 93.8% and 66.7%, specificity was 92.1% and 94.3%, positive predictive value was 83.3% and 83.3%, negative predictive value was 97.2% and 86.8% respectively.

Amsel法阳性率28%,组织多胺试验阳性率24%,一步法唾液酸酶活性的检测试验阳性率34%,革兰染色细菌评分法阳性率30%;唾液酸酶活性检测法与Amsel法,革兰染色细菌评分法相比较差异无显著性;组织多胺试验与Amsel法,革兰染色细菌评分法相比较差异无显著性;以Amsel法为标准,一步法唾液酸酶活性检测法和组织多胺试验的灵敏度分别为92.9%和71.4%,特异性分别为88.9%和94.4%,阳性预期分别为76.5%和83.3%,阴性预期分别为97.0%和89.5%;以革兰染色细菌评分法为标准,一步法唾液酸酶活性检测法和组织多胺试验的灵敏度分别为93.8%和66.7%,特异性分别为92.1%和94.3%,阳性预期都为83.3%,阴性预期分别为97.2%和86.8%。

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推荐网络例句

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。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力