The authors characterize the forms of additive invertable operators preserving inverse matrix of the upper triangular matrix space over a field which characteristic is not 2 or 3 .
刻划了特征不为2及3的域上的上三角矩阵空间保逆矩阵的可逆加法算子的形式。
X-type molecular sieves are synthesized by using polymer methylcellulose as a space-confined additive.
以聚合物甲基纤维素作空间位阻剂合成了X型分子筛。
To meet the requirements of well cementing fors mall borehole and small annular space, the composite plastic fluid loss additive PT-2 was studied.
为适合小井眼、小间隙井的固井要求，研究了复合塑性降滤失剂PT—2体系。
The performance of space-time channel coding scheme is discussed under a Rayleigh fading channel with spatially correlated fading amplitudes and an additive white Gaussian noise.
主要研究了空时编码系统在相关瑞利衰落信道和高斯噪声环境下的性能。
The performance of space-time channel coding scheme is discussed under a Rayleigh fading channel with spatially correlated fading amplitudes and an additive white Gaussian noise.
主要研究了空时编码系统在相关瑞利衰落信道和高斯噪声环境下的性能。
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