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By time-varying filtering, we realize the signal selectivity and interference suppression, especially for the signals with time-varying power spectrum. It is shown herein that conventional eigenstructure based methods are lower dimensional special case of the time-frequency subspace fitting method. The closed-form array response estimation algorithms for blind source separation in wireless communication is also developed in the dissertation by exploiting the data structure of second-order statistics of the array output in the presence of multipath. The proposed method achieves array response estimation with little constraint on signal property and propagation environment such as scatters or angular spread. Moreover, the array utilized here can be of arbitrary geometry and even uncalibrated. Since the closed-form solution is obtained, no misconvergency may occur and large amount of computation can be saved. The equivalent feed model and corresponding optimization designation are proposed to realize the downlink multi-user selective transmission. By coherent and non-coherent superposition of the electromagnetical field, multiple beams can be formed using a single array, so that each co-channel user signal is transmitted in each beam and will not interfered with each other. The proposed system scheme implements the digital beamforming and the channel allocation in the base band, therefore is suitable for the utilization of the radio software technology. The feasibility and effectiveness of the proposed model are proved by the RF experiment.
在窄带条件下,GSC-SSF方法还可以提高阵列的虚拟孔径,从而提高估计的性能;可以证明,Cyclic DOA 和SC-SSF方法可看作该方法的特例或近似; 3、提出了二维GSC-SSF方法和宽带谱相关DOA矩阵方法,利用信号的循环平稳特性解决了宽带条件下二维 DOA 估计问题,并具有阵元数少、计算量较小的特点; 4、提出了时频子空间拟合和宽带时频DOA估计算法,将联合时频分析的理论和方法引入到阵列信号的空间谱估计研究中,利用时变滤波实现信号选择性测向和干扰抑制,特别适合于谱时变信号;可以证明传统特征结构法可看作是时频子空间拟合方法的特例; 5、提出了多用户环境下阵列响应的估计方法——CARE方法,该方法对信号结构和传播参数(主要是散射源分布与角度散布)的约束较少,适用于各种几何结构的阵列甚至未校准的阵列,能够直接得到阵列响应的闭式解,因此计算量小、稳健性好,不存在收敛问题; 6、提出了针对多用户下行选择性发送的阵列等效激励模型、优化设计方法及其系统实现方案,通过空间场的相干叠加与非相干叠加使得单一阵列能够形成多个波束,并保证各波束内的用户信号各不相同且相互干扰最小;其系统方案具有在基带实现数字波束成形、信道分配并便于软件无线电实现的特点,其有效性已得到外场实测数据的证实。
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The thesis shows that the contradiction analysis method and the system analysis method are not inconsistent but consistent; that the contradiction analysis method is the core and system analysis method is its supplement and expandedness. They penetrate each other, promote each other and bring out the best in each other.
认为矛盾分析方法和系统分析方法不是矛盾的,而是一致的,矛盾分析方法是核心,而系统分析方法是它的展开和补充,二者相互渗透,相互促进,相得益彰。
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Respondents said they would change their lover's hair(24 percent women,17 percent men),nose (11 percent women,9 percent men),mouth(6 percent each),eyey(5 percent each) or ears(4 percent each).
受访者说他们希望改变爱侣的头发(24%的女性及17%的男性),皱纹(9%的女性及11%的男性),鼻子(11%的女性及9%的男性),嘴(男女各6%),眼睛
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Cloud girl husband's mother loves to act in a Chinese opera as a child, arrive the twelfth month of the lunar year, it is Yun Niu when husband's mother is the proudest, because this is the optimal time that calls big play, cloud girl husband's mother always is met flounder each village not be born watchs each show, and I, it is her dutiful epigone, in the night with each month Lang Fengqing or fulminatory fierce wind, we are holding platelet stool in the arms, place in large volume
云妞姑从小就爱唱戏,一到腊月,就是云妞姑最自得的时候,因为这是唱大戏的最佳时候,云妞姑总会辗转各村一场不落地看完每一场戏,而我,是她忠实的追随者,在一个个月朗风清或狂风怒号的夜里,我们抱着小板凳,夹在大大小
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Wherein X is an oxygen atom or a sulfur atom; C*, C** and C*** are asymmetric carbons; R 1 , R 2 , R 4 , R 5 , R 8 , R 9 and R 10 are each a lower alkyl group optionally having substituent and the like, or R 4 and R 5 and the like in combination optionally form a homocyclic ring optionally having substituent and the like; R 3 is an aryl group optionally having substituent and the like; R 6 and R 7 are each a hydrogen atom and the like; Nu is -CR 16 (COR 17 )(COR 18 ) wherein R 16 , R 17 and R 18 are each a lower alkyl group optionally having substituent and the like, and the like; and EWG is an electron withdrawing group.
通式中,X代表氧或硫;C *、C **和C ***分别表示不对称碳;R 1 、R 2 、R 4 、R 5 、R 8 、R 9 和R 10 分别代表任选取代的低级烷基等,条件是例如R 4 和R 5 可以相互结合形成任选取代的同素环等;R 3 代表任选取代的芳基等;R 6 和R 7 分别代表氢原子等;Nu表示-CR 16 (COR 17 )(COR 18 )(其中R 16 、R 17 和R 18 分别代表任选取代的低级烷基等)等;并且EWG表示吸电子基团。
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Methods: 100KunMing mice were divided into four groups randomly, each group included 25 mice inoculated EAC cells. The mice were treatedby celiac injection with saline solution , L-Arg , 5-Fu, L-Arg + 5-Fu respectively in each group . The natural survival time andthe average hydroperitoneum capacity were recorded for each group before the mice were killed.
将100只昆明小鼠随机分成4组,接种EAC细胞,依照分组向腹腔注射生理盐水、L-Arg、5-Fu、L-Arg+5-Fu,同时记录各组小鼠自然存活时间、处死时平均腹水量。
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There was no significant difference in the average dosage between patients with and without hypohidrosis in each age group. However, there was a significant difference in the average age between patients with and without hypohidrosis in each dosage group.Both developing and mature mice were treated with a low (20 mg/kg/day) and high dose (80 mg/kg/day) of topiramate for four weeks. Each group contained 12 mice.
在控制年龄因素的影响(来源:Abe0e0eBC论文网www.abclunwen.com)后,托吡酯剂量对泌汗障碍的发生无显著影响;而在控制剂量因素的影响后,年龄仍显著影响泌汗障碍的发生。2周龄和2月龄小鼠随机分配至托吡酯低剂量组(20 mg/kg/d)、高剂量组(80 mg/kg/d)和对照组,每组12只。
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Materials and Methods: There were 91 prostate cancer patients included in this study. We analyzed the characteristics of each item of the EORTC QLQ-C30 and EORTC QLQ-PR25 by CTT and IRT. The infit statistics of Rasch model was used to examine the unidimensionality of each domain, and also evaluate the item difficulty, the range of item threshold, item targeting and the reliability of the two questionnaires. Furthermore, patients were measured before therapy and at 1, 3 and 6 months after the start of therapy and then compared each health-related quality of life score of the post-therapy groups with the baseline scores. Finally, the item psychometric properties were examined for different groups stratified by age and disease severity.
材料与方法:本研究共计收案91名摄护腺癌患者,利用传统测量与项目反应理论(item response theory, IRT)比较分析问卷各题目的特质,以适合度指标检验各向度是否符合单一向度的假设,并检验每一题目的难度、门槛值范围、适中性,以及问卷的信度;然后,再检验各题目在治疗前后、不同疾病严重度或不同年龄族群中之心理计量特质是否相同。
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Sees only Moon crater which this at the beginning of war rests, from piece of on pale under black light and shade lamination dust, the slowly appearance, under the Moon small gravitation, true completely is being in the clouds quiet down, estimated needs at least for month-long the time, looked like the war the haze also must continue for a long time; Harbors the extremely serious mood, greatly leads several intimate assistants for doctor, passed through the thick dust dense fog, in basically cleans in the battlefield which finished to seek, the human brave warrior's skeleton already properly is processed early, but in the battlefield everywhere all has without enough time cleaning up each kind of weaponry, each kind of components which the guns, the bullet, the portable laser cannon and scatter, mixes with in the every large or small chippings, eliminates this also to have is wrecked innumerably, the kind of person robot makes threatening gestures to maintain each kind of death posture wreckage and the fragment, this gets down quietly the battlefield everywhere is filling the air the death breath, is constraining the people sensitive frail nerveDavid Dr.
只见这座大战初歇的月球环形山,正在从一片上淡下黑明暗分层的尘埃云中,慢慢的显露出来,在月球较小的引力作用下,真正的完全沉寂下来,估计至少需要一个月的时间,看来战争的阴霾还要持续许久;怀着极为沉重的心情,大为博士带领几位亲密的副手,穿过浓厚的尘埃迷雾,在基本打扫完毕的战场上寻找着,人类勇士的尸骸早已经被妥善处理,但是战场上到处都有来不及清理的各种武器装备,枪支、子弹、便携激光炮和散落的各种零件,夹杂在大大小小的碎石块中,除此还有无数被击毁的,类人机器人张牙舞爪保持着各种死亡姿态的残骸和碎片,这个沉寂下来的战场到处弥漫着死亡的气息,压抑着人们敏感脆弱的神经,大卫博士一行人,就这样巡视着并细心察看着这场战争的严重破坏。
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The information of each respect, each course, each industry, those who make we swim to information from information ocean is laky in.
各方面、各学科、各行业的信息,使我们从信息海洋游到信息的湖泊里。
- 相关中文对照歌词
- To Each His Own
- May Each Day
- Hurting Each Other
- You Each Time
- That's Why We Call Each Other Baby
- Living Each Day Like You're Already Dead
- Living Each Day Like You're Already Dead
- Being At War With Each Other
- Keep Each Other Warm
- We Are Each Other
- 推荐网络例句
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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.
另一方面,更重要的是由于城市住房是一种异质性产品。
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Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.
气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。
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You rap, you know we are not so good at rapping, huh?
你唱吧,你也知道我们并不那么擅长说唱,对吧?