波带

We studied the algebraic structure of a subclass of 3-band wavelet systems, and got the similar results as in the 2-band case.

对于3带小波系统，我们研究了具有极小McMillan度数的小波系统的代数结构，得到了和文献[60]中的2带小波系统类似的结论。

Day, he one when hunting in the forest,he caughtsight of artemis'' fair maidens,the seven pleiades .hewas so attracted by their beauty that he started chasing them.indespair the charming maidens prayed to artemis for help and were sent up by the goddess to the heavens as a constellation .later he fell in love with another maiden,merope by name,butrash and impatient,he took the maiden by force and enraged her father,king oenopion of chios.the king made him drunk and put out his eyes .following the sound of the cyclopes'' hammer,he went to hephaestus,who sent a guide to travel with him to the east,where the sun rose.exposing his eyeballs to the rays of the sun,he was restored to his eyesight.he became aconstant companion of artemis and followed the goddess in the chase with his dog sirius.apollo did not approve of this love, however.one day he dared his sister to shoot at a dark spot moving in the sea.little did she suspect that she was aiming herarrow at orion,for the dark spot turned out to be the head of orion swimming in the ocean.artemis was extremely sad.as she could not pull him back from the grasp of death she sent him up to the sky as a constellation,with his hunting dog sirius be sidehim.

他是海神波塞冬漂亮的儿子。一天，他在森林中打猎，看到了阿尔特弥斯的仙女们——七颗明星。他如此爱慕她们的美丽，便追赶她们。困境中，美貌的仙女们向阿尔特弥斯求救。结果女神将她们都送入天空充当星座。后来奥利安爱上了另一少女墨洛珀。他鲁莽急躁地施暴于她。这激怒了少女的父亲俄诺皮耳国王。国王把他灌醉后，挖出了他的眼睛。随着"独眼巨人"大锤的敲响，他来到火神赫斐斯托斯跟前。火神派向导带他去太阳升起的东方。将眼球暴露于阳光后，他就恢复了视力，成了女神阿尔特弥斯永久的伴侣，并带着他的猎狗天狼跟随女神打猎。阿波罗并不赞成他们之间这种恋情。一天，阿波罗怂恿阿尔特弥斯向海中一移动的黑点射箭。她根本没想到自己是将箭瞄准奥利安。当看清黑点竟是在游泳的恋人奥利安的头时，阿尔特弥斯悲痛万分。因她无力使他起死回生，只好将他送入天空作一星座。他的猎狗天狼则蹲在他的身旁。

Orion orion was a giant hunter.he was the beautiful son of poseidon.one day ,when hunting in the forest,he caughtsight of artemis'' fair maidens, the seven pleiades .hewas so attracted by their beauty that he started chasing them.indespair the charming maidens prayed to artemis for help and were sent up by the goddess to the heavens as a constellation .later he fell in love with another maiden ,merope by name,butrash and impatient, he took the maiden by force and enraged her father,king oenopion of chios.the king made him drunk and put out his eyes .following the sound of the cyclopes'' hammer,he went to hephaestus ,who sent a guide to travel with him to the east,where the sun rose.exposing his eyeballs to the rays of the sun ,he was restored to his eyesight.he became aconstant companion of artemis and followed the goddess in the chase with his dog sirius.apollo did not approve of this love,however.one day he dared his sister to shoot at a dark spot moving in the sea.little did she suspect that she was aiming herarrow at orion ,for the dark spot turned out to be the head of orion swimming in the ocean.artemis was extremely sad.as she could not pull him back from the grasp of death she sent him up to the sky as a constellation, with his hunting dog sirius be sidehim.

奥利安奥利安是位身材高大的猎手。他是海神波塞冬漂亮的儿子。一天，他在森林中打猎，看到了阿尔特弥斯的仙女们——七颗明星。他如此爱慕她们的美丽，便追赶她们。困境中，美貌的仙女们向阿尔特弥斯求救。结果女神将她们都送入天空充当星座。后来奥利安爱上了另一少女墨洛珀。他鲁莽急躁地施暴于她。这激怒了少女的父亲俄诺皮耳国王。国王把他灌醉后，挖出了他的眼睛。随着"独眼巨人"大锤的敲响，他来到火神赫斐斯托斯跟前。火神派向导带他去太阳升起的东方。将眼球暴露于阳光后，他就恢复了视力，成了女神阿尔特弥斯永久的伴侣，并带着他的猎狗天狼跟随女神打猎。阿波罗并不赞成他们之间这种恋情。一天，阿波罗怂恿阿尔特弥斯向海中一移动的黑点射箭。她根本没想到自己是将箭瞄准奥利安。当看清黑点竟是在游泳的恋人奥利安的头时，阿尔特弥斯悲痛万分。因她无力使他起死回生，只好将他送入天空作一星座。他的猎狗天狼则蹲在他的身旁。

Orion was a giant hunter.he was the beautiful son of poseidon.one day,when hunting in the forest,he caughtsight of artemis'' fair maidens,the seven pleiades .hewas so attracted by their beauty that he started chasing them.indespair the charming maidens prayed to artemis for help and were sent up by the goddess to the heavens as a constellation .later he fell in love with another maiden,merope by name,butrash and impatient,he took the maiden by force and enraged her father,king oenopion of chios.the king made him drunk and put out his eyes .following the sound of the cyclopes'' hammer,he went to hephaestus,who sent a guide to travel with him to the east,where the sun rose.exposing his eyeballs to the rays of the sun,he was restored to his eyesight.he became aconstant companion of artemis and followed the goddess in the chase with his dog sirius.apollo did not approve of this love,however.one day he dared his sister to shoot at a dark spot moving in the sea.little did she suspect that she was aiming herarrow at orion,for the dark spot turned out to be the head of orion swimming in the ocean.artemis was extremely sad.as she could not pull him back from the grasp of death she sent him up to the sky as a constellation,with his hunting dog sirius be sidehim.

奥利安是位身材高大的猎手。他是海神波塞冬漂亮的儿子。一天，他在森林中打猎，看到了阿尔特弥斯的仙女们——七颗明星。他如此爱慕她们的美丽，便追赶她们。困境中，美貌的仙女们向阿尔特弥斯求救。结果女神将她们都送入天空充当星座。后来奥利安爱上了另一少女墨洛珀。他鲁莽急躁地施暴于她。这激怒了少女的父亲俄诺皮耳国王。国王把他灌醉后，挖出了他的眼睛。随着"独眼巨人"大锤的敲响，他来到火神赫斐斯托斯跟前。火神派向导带他去太阳升起的东方。将眼球暴露于阳光后，他就恢复了视力，成了女神阿尔特弥斯永久的伴侣，并带着他的猎狗天狼跟随女神打猎。阿波罗并不赞成他们之间这种恋情。一天，阿波罗怂恿阿尔特弥斯向海中一移动的黑点射箭。她根本没想到自己是将箭瞄准奥利安。当看清黑点竟是在游泳的恋人奥利安的头时，阿尔特弥斯悲痛万分。因她无力使他起死回生，只好将他送入天空作一星座。他的猎狗天狼则蹲在他的身旁。

This finished the embedding process, and the test results show that this algorithm has certain imperceptivity and robustness. Because of the same embedding intensity, on one hand, it leads to the decline of the quality of the carrier image and influence the transparency and robustness of the watermark.

在此基础上，本文介绍了一种传统的基于小波变换的数字水印算法，这种算法将数字水印小波分解后的各个子带，嵌入到原始载体图像第三级小波子带中去，实现了水印的嵌入，试验结果显示该算法具有一定的不可见性和鲁棒性。

In this thesis, the crystal structure and phase transition behaviors of a andβforsterite (Mg2SiO4) at high temperature and high pressure were investigated by the first principle calculations and the quasi-harmonic Debye model. Variations of elastic properties, band structure, density of state, band gap ofαandβforsterite with pressure were calculated, and the effect ofα/βphase transition on these characters was analyzed. The effects of water on elastic modulus, sound velocity and band gap of forsterite were also simulated. Finally, the effect ofα/βphase transition and water on seismic discontinuity in earth was discussed.

通过第一性原理结合准简谐德拜模型研究了α和β镁橄榄石的高温高压结构及相变特征；计算了α和β镁橄榄石的弹性模量、波速、电子带结构、带隙等随压力的变化规律，并探讨了相变对这些性质的影响；研究了水对α镁橄榄石弹性模量、波速和带隙的影响；探讨了水对地幔中不连续层的作用以及矿物相变对过渡带波速不连续的作用。

To increase the security of the watermark, a new binary image encryption algorithm based on TD-ERCS map is presented. The watermark is encrypted by a chaos sequence generated by TD-ERCS map; A novel color image watermarking algorithm is proposed based on discrete chaotic map and 2-dimensions discrete wavelet transform. The watermark is encrypted by the new binary image encryption algorithm, and the encrypted watermark is embed into four sub-bands of the most deep level of blue branch of host image by three-level wavelet transform, and the embedded positions are determined by general cat cha otic map; A novel color-image blind detection watermarking algorithm is proposed based on integer wavelet transform and subsampling. The scrambled watermark is encrypted and embed into the low sub-bands after four sub-images of the Y branch of host image is transformed by two-level wavelet transform, and the embedded positions are determined by Logistic chaotic map, this watermarking scheme can realize blind extraction.

为了提高水印图像的安全性，提出了一种基于TD-ERCS混沌映射的二值水印图像的加密算法，该算法利用TD-ERCS映射产生的混沌序列加密水印图像；将离散混沌映射和二维离散小波变换相结合，研究了彩色图像水印新算法，该算法先对混沌序列加密后的水印图像进行小波变换，再嵌入到宿主图像的蓝色分量的最深层的四个子带中，嵌入位置则由广义猫映射确定；将整数小波变换和图像子采样技术应用于数字水印，提出了一种彩色图像盲提取水印算法，水印嵌入时，先对宿主图像在YIQ色彩空间中的Y分量进行子采样，并对得到的四个子图像分别进行二级离散小波变换，然后将置乱并加密后的水印图像嵌入到小波变换后的低频子带中，其嵌入位置由Logistic混沌映射产生的混沌序列确定，实现了水印的盲提取。

To solve the exsisting problems in the realization of the LFM/CW radar, the thesis presents a technique for dynamically measuring the LFM/CW signals, which can accomplish the dynamic measurements of FM linearity, FM bandwidth and FM slop of the transmitted signals of LFM/CW radars. This technique creates an effective and accurate means of judging the performance of LFMCW radars. The linearity-correction techniques presented in the thesis successfully make the linearity of the transmitted signals of an actual LFM/CW radar reduce from approximately 25% to 0. 1%(or r. m. s linearity of 0.04%), better than the best results (0.22%) obtained by foreign researchers with complex linearization closed-loop in the same kind of LFM/CW radars, according to the published literatures during the last decade. In order to improve the capability of the real-time processing and range-cells management of LFM/CW radars, the principle of equivalent mixing by lacking-sampling process of band-pass real signals is proposed based on the well-proved improvedversion of sampling theorem of band-pass real signals. This principle is used to configure the range-segments processing of the beat signals of an actual LFM/CW radar. The techniques of system-background interference suppression and the beat signal's dynamic range suppression are proposed, and are realized in an actual LFM/CW radar to demonstrate their effectiveness.

针对线性调频连续波雷达实现中急待解决的技术问题，文中提出并验证了线性调频连续波信号的综合动态测试技术，可以完成对线性调频连续波雷达发射信号的扫频线性度、扫频带宽和扫频斜率的综合动态测试，为衡量实际线性调频连续波雷达的系统性能创立了精确有效的测试手段；文中建立的非实时闭环动态校正技术使一部实际的线性调频连续波雷达的发射信号（时带积3×10〓）的扫频线性度从25%改善为0.1%（方均根线性度0.04%），优于国外已公布的80年代同类雷达中采用复杂的实时闭环动态校正环路所获得的实际结果（0.22%）；为了改善线性调频连续波雷达的实时性和分辨单元数处理能力，文中发展完善了实带通信号的采样定理并给予了严格证明，并在此基础上提出了欠采样等效混频原理，将其应用于实际线性调频连续波雷达的距离分段处理中；针对线性调频连续波雷达中系统背景干扰和回波动态范围问题，创立了系统背景综合抑制技术和频域动态范围压缩技术，并将它应用于实孔线性调频连续波雷达系统中，显示出它们的有效性。

It can be inferred that the focus-variable Fresnel zone lens can be made by changing the index of refraction of material.

据此分析，通过改变透镜材料的折射率，可以制作变焦的菲涅耳波带透镜。

This thesis proposes an approach, using the technique of optical injection locking, regarding to the carrier and sideband of a 823nm semiconductor laser, to control the phase between them.

我们提供一个方法，针对经过声光调制器之后的 823nm 半导体雷射所产生的载波与旁波带，利用雷射注入锁频的原理，对两者之相位差做操控。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。