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By means of analyzing the noise error, it is proposed to use an algorithm of singular value decomposition total least squares to conduct the interharmonics estimation, namely taking the noise interference at both sides of the matrix equation into account simultaneously and solving the minimum norm problem by least square method under such condition. In the proposed algorithm by means of singular value decomposition of a new augmented matrix and by use of a simple and practical method to determine the number of principal singular value related to signal to noise ratio, the storage calculation of right singular matrix is performed, thus a more accurate frequency estimation of interharmonics can be obtained.
通过分析噪声误差,提出采用奇异值总体最小二乘(singular value decomposition total least squares,SVDTLS)算法进行间谐波频率估计,即同时考虑矩阵方程两边的噪声干扰,采用SVDTLS算法求解该情况下的最小范数解,通过对增广矩阵进行奇异值分解(singular value decomposition,SVD),采用简单实用的与信噪比相关的主奇异值个数确定方法对分解的右奇异矩阵进行存储计算,得到了较精确的间谐波频率估计结果。
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We predict, total sales was market of advertisement of Chinese mobile phone 2007 RMB 780 million yuan of 110 million dollar about, scale is occupied to be only in total advertisement sale 0.7%.
我们预计,中国手机广告市场2007年总销售额为人民币7.8亿元(约合1.1亿美元),在总广告销售额中所占比例仅为0.7%。
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Based on the measurement and calculation of Chinese agricultural Total Factor Productivity using the non-parameter Data Envelopment Analysis and Malmquist productivity index approach,the paper has tested the convergence hypothesis of the agricultural TFP growth in China for the transformational period(1978~2005),and this includes the σ convergence,unconditional β convergence and the conditional β convergence.
在利用非参数的DEA曼奎斯特生产率指数方法对中国农业全要素生产率进行求解的基础上,论文运用经济增长收敛理论对农业TFP(Total Factor Produc-tivity)增长在1978~2005年转型期的收敛性情况进行检验,这包括从σ收敛、绝对β收敛到条件β收敛的全面检验。
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ABSTRACT Objective: To observe the protective effects of Corydalis ambailis migo total alkaloids on cerebral ischemia/reperfusion injury in rats and to investigate its mechanism.
摘要] 目的:观察夏天无总碱(Corydalis ambailis migo total alkaloids, COAMTA)对脑缺血/再灌注损伤的保护作用并对其机制作初步探讨。
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Objective To survey the relationship between nutrimental condition and the levels of serum lipids and lipoprotein. Methods The levels of total cholesterol, triglycerides high density lipoprotein cholesterol, low density lipoprotein cholesterol, apolipoprotein A1 (apoA1) and apolipoprotein B100(apo B100) B100 in 514 middle school students aged from 12 to 15 years old in Haikou City were determined.
目的 探讨营养状况与血脂及载脂蛋白水平的关系方法检测了海口市514例12~15岁中学生的营养状况并分析其与血清总胆固醇(Total-Cholesterol,TC)、甘油三酯(Triglycerides,TG)、高密度脂蛋白胆固醇(High Density Lipoprotein Cholesterol,HDL-C)、低密度脂蛋白胆固醇(Low Density Lipoprotein LDL-C)、载脂蛋白(Apolipoprotein,apo)A1及B100的关系。
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In addition, an obvious depression in the retromandibular region almost always results from either superficial or total parotidectomy.
许多腮腺疾病都须采用浅叶或全叶切除术(superficial or total parotidectomy)治疗,术后下颌骨后区域常会形成一凹陷。
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The studies was proceeded on the the supercritical CO2 extraction technique of rotenone from Tephrosia vogelii. The extraction influences of technology conditions were systematically groped, The research results were listed as follows:1 The analysis method applied in this paper has been proved to be suitable to technology research of the studies on the SC-CO: extraction technique of rotenone from Tephrosia vogelii. 3 indexes, extraction ratio of rotenone. extraction ratio of total compounds and rotenone content percent in total compounds weight, were carried out with HPLC quantitatively determination combined with the sample weight loss after extraction. With these 3 indexes. The extraction influences of technology conditions were evaluated by synthesis. Then the best technology conditions were ascertained for different extraction aims.2 The pretreatment of rough material should be needed before extraction. Comminuting the material to 0.28mm size is most fit to SC-CO: extraction.3 Firstly static extracting 20 min then turn to dynamic doing is the better extraction mode than other ones.4 The orthogonal experiment was conduct with 3 factors and 5 levers.
本论文通过对非洲山毛豆SC-CO_2萃取中影响萃取效果的工艺条件的研究,初步得出如下结果:(1)本论文中所采用的萃取效果评价方法适宜于非洲山毛豆中鱼藤酮的超临界流体萃取技术研究,该方法具体为:HPLC定量分析非洲山毛豆SC-CO_2萃取物中的鱼藤酮含量,再结合萃取前后处理样品的重量损失,得出鱼藤酮萃取率、萃取所得粗物质萃取率和粗物质中鱼藤酮含量三个参数,以此三个指标综合评价萃取条件对萃取效果的影响;(2)通过对原料粒度对萃取效果影响的研究,结果表明SC-CO_2萃取非洲山毛豆复叶中的鱼藤酮,原料粉碎成30目粒度叶粉时萃取效果较好;(3)通过对萃取方式与萃取效果之间关系的研究,结果表明SC-CO_2萃取非洲山毛豆中鱼藤酮应采用先静态后动态的萃取方式,静态萃取时间为20min;(4)通过温度、压力和CO_2流量三因素五水平的正交试验,结果表明温度是最主要的影响因素,压力因素对鱼藤酮萃取率的影响程度高于CO_2流量,而对于粗物质萃取率和粗物质中鱼藤酮含量CO_2流量因素高于压力。
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Since nonparameter seasonal Kendall test may result in error in total trend analysis of the whole year or many stations when there exist uptrends and downtrends among different seasons or stations, a consistent test method of the total trend is recommended to solve this problem so as to perfect nonparameter seasonal Kendall test.
第三章首先分析了河流水质序列中的几种变化趋势类型,综述了国内外用于趋势检验分析的各种方法,归纳出非参数季节性Kendall检验方法为较理想的方法,然后针对该方法在进行总趋势分析时可能出现的站与站之间、季节之间上升、下降趋势的相互抵消问题,提出了趋势纯一性检验方法,并把这些方法应用于淮河流域56个水质站的趋势分析,取得了满意的结果。
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Surge current: 10 x 8/20 s wave in total; AC current: 10 x 1 s /50 Hz in total 2 Nominal DC spark-over voltage
浪涌电流:10 x 8/20 s总电流波;工频电流:10 x 1 s /50 Hz 总电流 2 标称直流击穿电压
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Total Recall is another very good movie from Arnold, but its special effect is really so so in today's standard, so better to watch it in a 720p.
Total Recall 是阿诺的另一部好电影,不过它的特技以今天的角度来讲太差了,720P反而更好。
- 推荐网络例句
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This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
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Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
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There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。