查询词典 fir

Dynamical behaviors such as periodic, quasi-periodic and chaotic waveforms are observed on oscilloscope. It is expected that the proposed chaotic sources and their circuit implementations are beneficial to the application of neural networks. 4 A template of Cellular Neural Network is derived aimed at solving second-order hyperbolic wave equations based on space discrete method, a novel alternating recursive algorithm implementation is given.

提出了采用复数神经网络进行FIR滤波器设计的方法，利用复数信号能够同时携带幅度和相位信息的特点，构造了相应的具有复数的状态、偏置输入、输出、网络联接权的复数神经网络，证明了算法的收敛性，给出了网络的电路实现图，这方面工作对于拓展神经网络算法的应用范围和寻求FIR滤波器的设计新方法是有益的。

Hence, the modulus of rigidity, G, of glulam was measured by vibration test method in order to realize the shear deflection effect. The E/G values of Japanese cedar, Taiwania, Douglas-fir, and southern pine glulam were ranged form 13.2 to 14.5, 14.6 to 16.6, 12.1 to 16.6 and 16.0 to 19.1, respectively. The pure MOE was also obtained. The Ep and MOR values of glulam were ranged from 10.6 to 13.4 GPa and 48.3 to 61.9 MPa for Japanese cedar, ranged from 12.1 to 15.0 GPa and 41.8 to 58.8 MPa for Taiwania, ranged from 10.5 to 16.4 GPa and 37.2 to 65.6 MPa for Douglas-fir, ranged from 14.5 to 20.6 GPa and 70.2 to 78.48 MPa for Southern pine, respectively.

而消除剪力挠曲影响，即可得集成材之抗弯弹性模数真实值与抗弯强度，依本研究配置所得之柳杉集成材之Ep值与MOR值分别为10.6-13.4 GPa与48.3-61.9 MPa；台湾杉集成材之Ep值与MOR值分别为12.1-15.0 GPa与41.8-58.8 MPa；花旗松集成材之Ep值与MOR值分别为10.5-16.4 GPa与37.2-65.6 MPa；南方松集成材之Ep值与MOR值分别为14.5-20.6 GPa与70.2-78.4 MPa。

To solve the problem of analysis and computation during using a finite impulse response model with high orders, orthonormal basis functions are constructed by utilizing partial system information and then introduced into traditional FIR modeling. A generalized FIR modeling method is proposed.

为了解决高阶脉冲响应模型带来的分析和计算上的困难，利用系统的部分已知信息构造正交基函数，并将其引入到传统脉冲响应建模中，提出了一种广义脉冲响应模型辨识方法。

The female parents are 4 choice [1] ness clones in Chinese fir primary orchard. The male parents are 3 polyanthus clones in the gene pool of old Chinese fir, the mixed pollen of these clones and all the clones in this gene pool. The testing woods were founded with 18 cross grouping which were obtained by the using of NCⅡ.

以经过子代测定的杉木初级种子园中的4个优良无性系为母本，老杉木种质资源库中的3个花芽较多的无性系及其混合花粉和种子园混合花粉为父本，采用测交系交配设计进行杂交制种，获得18个杂交组合并以此营建试验林。

The results indicated that the permeability of chinese fir,masson's pine and Chinese sassafras increased when treatment pressure increased under 35 MPa;the permeability change rate of chinese fir increased to 493%,the highest at treatment temperature of 40℃,and the permeability change rate of mass...

结果表明，在35 MPa内，处理压力的增大有利于3种木材渗透性的提高；杉木在处理温度为40℃时，渗透性的变化率达到最大，为493%，马尾松和檫木在处理温度为45℃时，渗透性的变化率达到最大，分别为479%和349%；较佳的处理时间为30 min。

By the changing tendency of N, P, K, we coudle see N, P decreased significantly, especially P, the concentration of which was deficient for Chinese Fir nomal growing, but K nutrients were unnoted. So we suggestted increasing N, P fertilizer for Chinese Fir normal growing and might rise its yield.

由N、P、K的变化趋势可以看出，在杉木生长的整个周期，N、P含量降低明显，特别是P，其含量远低于杉木生长所需要的P含量的临界值，处于严重缺乏状态，K含量变化不明显，因此，建议在生产中增施N、P肥，以保证杉木正常生长，提高产量。

If time that 95% of dry matter is decomposed expresses turnoverperiod of litterfall decomposition,the turnover periods of Chinese fir,Castanopsis fissa,Schimasuperba,Castanopsis fargesii,ficus simplicissima,Maesa japonica,Boehmeria nivea,Woodwardiajaponica,Angiopteris fokiensis and Dicranopteris dicotoma put in 20-year-old Chinese firplantation are 2.7,2.1,3.0,2.2,0.5,1.9,0.3,1.5,0.9 and 3.9 years,respectively;they are 2.2,1.6,2.0,1.6,0.3,1.7,0.4,1.3,0.7 and 2.8 years put in 25-year-old Chinese fir plantation,respectively.

若以95%的干物质被分解后所需的时间表示凋落物的周转期，在20年生杉木林内，杉木、闽粤栲、木荷、丝栗栲、三龙爪、杜茎山、苎麻、狗脊、观音座莲和芒萁的凋落物周转期分别为2.7、2.1、3.0、2.2、0.5、1.9、0.3、1.5、0.9和3.9年；在25年杉木林内，它们分别为2.2、1.6、2.0、1.6、0.3、1.7、0.4、1.3、0.7和2.8年。

By using canonic signed digit to represent each coefficient of FIR filter and local search method to optimize the coefficients, we implement a multiplier-less FIR filter.

利用卫星数字电视广播系统中接收信号的频谱特性，提出一种基于离散傅立叶变换的载波恢复算法。

Biological circulation rate of five elements in Chinese fir layer is 0.412,but they are 0.505and 0.556 in shrub and herb layers,and they show the law of herb layer＞shrub layer＞Chinese firlayer,this shows that understory plants have significant conservation function of soil fertility innutrient circulation,but Chinese fir tree species has larger consumption of soil fertility.

杉木层的5种元素总生物循环速率为0.412，而灌木层和草本层的5种元素总生物循环速率分别为0.505和0.556，表现出草本层〉灌木层〉杉木层的规律，说明林下植物在养分循环中具有明显的地力维护作用，而杉木对地力消耗较大。

The third category is planted second-generation Chinese fir, the soil phenol content is highest. It shows that along the ecosystem conversion, or as the increase of Chinese fir planted generation, the phenols in soil are accumulated to a certain extent.(6) Detecting the soil of four systems and found that there exist p-hydroxybenzoic acid, vanillic acid and ferulaic acid, but not exist cinnamic acid.

根据主成分分析结果，大致可以把4种系统分成3类，第一类为天然更新常绿阔(来源：ABC论文8f网www.abclunwen.com)叶林，其土壤酚含量低；第二类为老龄杉木林和二代杉木萌芽天然更新林，其土壤酚含量较高；第三类为二代杉木人工林，其土壤酚含量最高。

No clear conclusions can be made about the predictie alidity of specific measures, they found, except for criteria for the underuse of drugs for cardioascular disease.

除了心血管病不合理用药标准外，对于特定评价方法的预测效度没有明确的结论。

The third and last is that almost all of them, being infinite in number, have been impostures, and by idle and crafty brains merely contrived and feigned after the event past.

第三、即最后一点是：几乎所有这些不胜枚举的预言都是欺人之谈，都是在事件过后由无聊而狡猾的脑筋推测与凭空捏造的。