二-十进制

Derive recursive least squares method, recursive general least squares method, recursive augmented matrix method, recursive multiple-stage least squares method and recursive maximum likelihood method based on recursive Householder transformation by applying the three real-time solutions of overdetermined linear equation to difference model.

将线性矛盾方程组的三种实时解法应用于差分模型，导出了基于Househol-der变换的递推最小二乘法、递推广义最小二乘法、递推增广矩阵法、递推多级最小二乘法和递推极大似然法。

Also the disomy of autosome is a little higher than gonosome, but there was no significant statistical difference among these values. In diploidy, as the frequencies ranged from 0.035% to 0.083%, heterogeneity was also not obvious.

同时在实验中观察到二体率比二倍率要高的情况，这可能意味着在精子形成的减数分裂过程中，二体更易形成。

Heat treatment tests of normalizing,quenching and temperature tempering,double quenching are carried on the material ZG25Mn for the axle box base of electric locomotive.

对机车抱轴承箱材料ZG2 5Mn进行了正火、调质、二次淬火的热处理工艺试验，比较分析了不同工艺的金相组织和机械性能，阐述了二次淬火的强韧化机理，认为二次淬火可以改善组织，提高强度与韧性。

Based on the bioisosterism of malonate group with phosphate group, a series of barbiturate compounds and pyrazolidine-3, 5-dione compounds were designed and synthesized.

基于丙二酸是磷酸的生物电子等排体，我们设计了丙二酸的闭环结构的巴比妥酸及3，5-吡唑烷二酮类化合物。

Therefore, the basie feature of Zhuangzhou's philosophy is the two-fold-in-one of the living outlook and ecological Outlook,such feature is mainly embodied in : expressing man's free nature by use of large ecological Outlook; the crux of such large ecological outlook is the protection and exploration of man's spirit ecology. This two...

因此，庄子哲学的根本特点便是生存观与生态观的二重合一，这种二重合一主要体现在：用大生态观言说人类的自由本性；这种大生态观的实质是对人类精神生态的保护与开掘；庄子哲学生存观与生态观的二重合一突出体现在《庄子》一书的叙事方式上。

The results show that these semi-high speed steels can be hardened remarkably by secondary hardening to meet the hardness requirements of cold rolling. The secondary hardness of the tested steels is increased with the contents of alloying elements such as Mo, V, Si and changed with quenching temperature to show two peaks.

研究结果表明，新型半高速钢有显著的二次硬化效应，能满足冷轧工作辊的硬度要求；随Mo、V和Si等合金元素含量升高钢的二次硬度升高，随淬火温度升高钢的二次硬度出现两次峰值。

Some new lignans of dibenzocycloheptadiene and benzofuran analogues were first synthesized successfully by intramolecular nonphenolic oxidative coupling and rearrangement of the 1,4-biaryl-2,3-dimethyl-2,3epoxide substituted butanes with DDQ in TFA.

以DDQ为非酚氧化偶合试剂与1，4-二芳基-2，3-环氧类化合物进行分子内的非酚氧化偶合反应，首次合成了二苯骈环庚二烯类和苯骈呋喃类的新型木脂素，其结构由不同光谱和X-单晶衍射所确证。

The title compound benzophenone hydrazone was prepared by the reaction of 80% hydrazine hydrate with benzophenone in ethylene glycol.

以 8 0 %水合肼和二苯甲酮为原料，在乙二醇中回流 3h得二苯甲酮腙，收率为 95 1%。

Experiment results show that binary tree SPIHT suits to true bidimensional wavelet decomposition and it is testified that in true bidimensional wavelet decomposition, the compression effect is comparable between image decomposed by wavelet FB with low order VMs but good interpolating characteristic and that with higher order VMs.

实验证实了二叉树的编码更适合纯二维小波分解，同时也证实了在纯二维小波分解中内插性能好的低阶消失矩的小波滤波器能够产生与高阶消失矩的小波滤波器相同或更好的压缩效果。

The 2-D bilinear transformation digital circuit from 1-D analog domain to 2-D discrete domain has been presented, which can ensure the exact realization of 1-D to 2-D bilinear transformation.

将此二维双线性变换数字电路用于2-D跳耦型数字滤波器的电路中，即可获得一种新的，稳定的二维数字滤波器实现。同二维波数字滤波器一样，2-D跳耦型数字滤波器亦以1-D无源LC双端接载梯型滤波器为导出原型。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。