排序方式: 共有4条查询结果,搜索用时 15 毫秒
1
1.
本刊84年第七期《二元二次式因式分解的一个简便方法》一文(下面称为“上文”)中,讨论了“取零凑尾法”在二元二次式因式分解中的应用。本文接着讨论“取零凑尾法”在多元(多于二元)二次式因式分解中的应用。为叙述方便,将上述有关结论写在这里,作为 相似文献
2.
Numerical simulation of a gradient-index fibre probe and its properties of light propagation 下载免费PDF全文
In order to verify the properties of the light propagating through a gradient-index (GRIN) fibre probe for optical coherence tomography (OCT), numerical simulation using the optical software GLAD is carried out. Firstly, the model of the GRIN fibre probe is presented, which is consisted of a single mode fibre (SMF), a no-core fibre (NCF), a GRIN fibre lens and an air path. Then, the software GLAD is adopted to numerically investigate how the lengths of the NCF and the GRIN fibre lens influence the performance of the Gaussian beam focusing through the GRIN fibre probe. The simulation results are well consistent with the experimental ones, showing that the GLAD based numerical simulation technique is an intuitive and effective tool for the verification of the properties of the light propagation. In this paper, we find that on the conditions of a constant GRIN fibre lens length of 0.1 mm and an NCF length of 0.36 mm, the working distance of the probe will be 0.75 mm and the focus spot size is 32 μm. 相似文献
3.
4.
形如Ax~2+Bxy+Cy~2+Dx+Ey+F的二元二次式的因式分解,一般可用求根公式法,待定系数法等方法进行分解,但计算都比较复杂。下面我们介绍一种简便的分解方法——取零凑尾法。这个方法的理论根据是定理二元二次多项式f(x,y)=Ax~2+Bxy+Cy~2+Dx+Ey+F能分解为一次式之积(a_1x+b_1y+c_1)(a_2x+b_2y+c_2)的充要条件是对 B=a_1b_2+a_2b_1, (1)使得 f(x,o)=(a_1x+c_1)(a_2x+c_2) (2) f(o,y)=(b_1y+c_1)(b_2y+c2) (3)证明:条件的充分性。设上三式同时成立, 相似文献
1