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- Autoregressive channel models based on Kalman filtering can estimate the spectrum holes well，and are commonly used to approximate discrete-time random processes. 采用基于卡尔曼滤波的自回归信道预测模型可较好地估计频谱空洞，自回归模型常用于近似离散时间随机过程。
- A spectrum hole detection scheme using the feature of cyclostationary of the comminicating signal is proposed, and its feasibility and reliability is tested with PSK signal as an example. 本文提出了利用通信信号的循环平稳特征进行频谱空穴检测的方案，并以PSK信号为例验证了该方法的有效性和可靠性。
- His strength in a crisis is an ace in the hole. 临危不惧是他的看家本领。
- Look at the holes that have been worn in this rug. 瞧瞧这块小地毯上磨出的洞。
- The enemy's shells made great holes in the ranks. 敌人的炮弹在士兵行列中炸成大洞。
- The holes in the cloth were made by moths. 布上的洞是虫子蛀的。
- They pick holes in everything I suggest. 只要是我提的建议他们就挑毛病。
- The survey covered a broad spectrum of topic. 这本简史涉及的话题范围很广。
- He chiseled a hole in the door to fit a new lock. 他在门上凿了个孔，以便装一把新锁。
- Rabbits had burrowed holes in the grassy bank. 兔子在河岸的草地上掘了些洞。
- The bird picked a hole in the ice with its beak. 那鸟在冰上啄出了一个洞。
- Father stopped up the rat's holes. 父亲堵塞了那些老鼠洞。
- The child has picked a hole in his new jumper. 孩子的新毛衣上勾了一个洞。
- I have worn my socks into holes. 我的袜子穿破了。
- Stick your hand in and see what's in the hole. 把手伸进去，看看洞里有什么。
- The dog skins through the small hole in the wall. 那条狗勉强钻过小小的墙洞。
- Red and violet are at opposite ends of the spectrum. 红色和紫色位于光谱相对的两端。
- The men in the hole sent up for more equipment. 在洞穴中的人们向上面要求再给他们一些设备。
- The mice have nibbled a hole in the cheese. 老鼠在奶酪上啃出了一个洞。
- It was easy to pick holes in his argument. 在他的论据里不难找到漏洞。
