Studies prove that there are strong relationships between vocabulary development and reading comprehension. In English, there is a relatively close relationship between the vocabulary size and English language profici...Studies prove that there are strong relationships between vocabulary development and reading comprehension. In English, there is a relatively close relationship between the vocabulary size and English language proficiency. Reading represents the primary way that ESL learners in China can learn on their own beyond the classroom. But vocabulary size in reading comprehension strongly limits the sorts of texts that they can read with ease. First, the problems Chinese EFL learners and teachers confront in comprehensive reading are revealed. And then some feasible ways of helping learners build word size in real teaching practice are demonstrated.展开更多
An array extension method in a noisy environment was proposed to improve angular resolution and array gain. The proposed method combines the FOC （fourth-order cumulants） technique with the ETAM （extended towed arra...An array extension method in a noisy environment was proposed to improve angular resolution and array gain. The proposed method combines the FOC （fourth-order cumulants） technique with the ETAM （extended towed array measurements） method to extend array aperture and suppress Gaussian noise, First, successive measurements of a virtual uniform linear array were constructed by applying lburth-order cumulants to measurements of uniform linear array; Gaussian noise in these measurements was also eliminated. Then, the array was extended by compensating phase differences using the ETAM method, Finally, the synthetic aperture was extended further by the fourth-order cumulants technique. The proposed FOC-ETAM-FOC method not only improves angular resolution and array gain, but also effectively suppresses Gaussian noise. Furthermore, it inherits the advantages of the ETAM method. Simulation results showed that the FOC-ETAM-FOC method achieved better angular resolution and array gain than the ETAM method. Furthermore this method outperforms the ETAM method in Gaussian noise environment.展开更多
上海电信本地多点分配系统(LMDS)接入试验[刊]/郭建华//电信快报.—2000,(6).—3～5(C)0014690用于探测电话网络多频信号的高阶累积方法=An ap-proach to high-order cumulants used to detect multifre-quency signals in telephone ne...上海电信本地多点分配系统(LMDS)接入试验[刊]/郭建华//电信快报.—2000,(6).—3～5(C)0014690用于探测电话网络多频信号的高阶累积方法=An ap-proach to high-order cumulants used to detect multifre-quency signals in telephone networks[刊,译]/刘英//中国邮电高校学报.—2000,7(1～2).—94～98(E)依据电话网络对移频信号的探测过程,并与自动修正方法相对比,本文介绍了一种快捷、低成本的累积估计方法。此探测方法比自动修正方法更实用,能更有效地抑制噪声。展开更多
文摘Studies prove that there are strong relationships between vocabulary development and reading comprehension. In English, there is a relatively close relationship between the vocabulary size and English language proficiency. Reading represents the primary way that ESL learners in China can learn on their own beyond the classroom. But vocabulary size in reading comprehension strongly limits the sorts of texts that they can read with ease. First, the problems Chinese EFL learners and teachers confront in comprehensive reading are revealed. And then some feasible ways of helping learners build word size in real teaching practice are demonstrated.
基金Supported by the National Science Foundation of China (No.60872146)
文摘An array extension method in a noisy environment was proposed to improve angular resolution and array gain. The proposed method combines the FOC （fourth-order cumulants） technique with the ETAM （extended towed array measurements） method to extend array aperture and suppress Gaussian noise, First, successive measurements of a virtual uniform linear array were constructed by applying lburth-order cumulants to measurements of uniform linear array; Gaussian noise in these measurements was also eliminated. Then, the array was extended by compensating phase differences using the ETAM method, Finally, the synthetic aperture was extended further by the fourth-order cumulants technique. The proposed FOC-ETAM-FOC method not only improves angular resolution and array gain, but also effectively suppresses Gaussian noise. Furthermore, it inherits the advantages of the ETAM method. Simulation results showed that the FOC-ETAM-FOC method achieved better angular resolution and array gain than the ETAM method. Furthermore this method outperforms the ETAM method in Gaussian noise environment.
文摘上海电信本地多点分配系统(LMDS)接入试验[刊]/郭建华//电信快报.—2000,(6).—3～5(C)0014690用于探测电话网络多频信号的高阶累积方法=An ap-proach to high-order cumulants used to detect multifre-quency signals in telephone networks[刊,译]/刘英//中国邮电高校学报.—2000,7(1～2).—94～98(E)依据电话网络对移频信号的探测过程,并与自动修正方法相对比,本文介绍了一种快捷、低成本的累积估计方法。此探测方法比自动修正方法更实用,能更有效地抑制噪声。
