查询词典 block antenna

In the jig design process, mainly locates by V shape block and the support plate, depends on the straight clamp and the spring clamps, drills turns diameter two to be supposed to use long trades quickly drills the wrap, when drills turns the diameter incline hole uses the plane incline the jig body, when drills turns the diameter incline hole uses is the horizontal-type drilling machine, when face milling 2 V shape blocks and the milling cutter cannot interfere ,therefore V shape block altitude must reduce, the jig design must be convenient, be simple.

在夹具的设计过程中，主要以V形块和支承板来定位，靠直压板和弹簧来夹紧，钻拐径两孔应采用长型快换钻套，在钻拐径倾斜的孔时采用平面倾斜的夹具体，在钻拐径倾斜的孔时使用的是卧式钻床，铣面时2个V形块与铣刀不能干涉，因此V形块高度要降低，夹具设计要方便、简单。

There are two types of switches :"heavy"X-shaped ones and "soft" round ones soft switches are activated when any part of your block presses it.hard switches require much more pressure,so your block must be standing on its end to activate it.

有 switches：&的二类型重的\&X-作形了一和把他弄圆当你的区段的任何部份压 it.hard 开关的时候，软的开关被刺激需要更多压力，因此你的区段一定在它的结束上站立刺激它。

Key projects in modern service industry contains Hangzhou industry products international trade center; in integral traffic construction Hangzhou - Huizhou expressway and Desheng throughway, etc; in cultural city construction Qinghe Lane historic and cultural block and Beishan Road historic and cultural block protection projects.

其中，现代服务业培育方面重点项目包括杭州工业品国际贸易中心等；综合交通建设方面有杭徽高速公路、德胜快速路等；文化名城建设方面有清河坊历史文化特色街区、北山街历史文化街区保护工程等。

Objective To evaluate the effect of nerve block and nerve block combined with glycerol and fructose injection on cervicogenic headache.

目的 比较甘油果糖复合神经阻滞和单纯神经阻滞治疗颈源性头痛的疗效和副作用。

In this paper, the author applied the large 3 dimension FEM program to simulate the block stopings block parameter and ore drawing sequence in the mining system design about -5 80m level of Datusan field in Shizishan Copper mine , and attained to good effect.

中段采矿系统的设计中，具有明显的现实意义和学术价值。

The mathematic models of damp groove type continuous oil supply port plate /cylinder block and semi-perimeter double oil groove type periodical oil supply port plate /cylinder block frictional pair was established in the paper.

本文对阻尼槽型连续供油配流副和半周槽双油腔间歇供油配流副两种较典型的配流副进行了数学建模。

Helena left by clicking on the grass after block of land on the map painted grass, and then left-click "can" to block property of the painting will be able to go after the lawn.

拿左键点一下草地的地图块之后就可以在地图上画草地，再用左键点一下&可以通过&的地图块属性后就能画可以走的草地。

The innovation of this paper can be explicated as the following:First, based on the spatial concepts of cadastral feature this paper presents "general block" and "general land parcel".Second, based on "general block" and "general land parcel" this paper presents the urban and rural integrative cadastral management model, and then combined with Geodatabase it introduces design of the urban and rural integrative cadastral database, and based on this the urban and rural cadastral data can be stored in the same database by the same way.

本文的主要工作集中在以下几个方面：第一，在基于地籍要素的空间概念支持下，提出了&广义街坊&和&广义宗地&的概念；第二，在&广义街坊&和&广义宗地&概念的支持下，提出了城乡一体化的地籍管理模型，并结合Geodatabase阐述了城乡一体化地籍数据库的设计，从而真正地实现了城乡地籍数据的统一存储。

Wind the wire rope from the two guiding block of the pillar, pass through the fall block, fix on the pillar or on the pulling shaft axle of weight limit appliance

4.4.4将卷扬机上钢丝绳从顶梁的两只导向滑轮上绕过，穿过吊笼上的动滑轮，固定在顶梁上（或顶梁上悬挂的重量限制器的拉杆轴上）。

The paper investigates both block-type pilot linear minimum mean square error algorithm and IEEE802.16 OFDM channel estimation analysis. Simulation results confirm the block-type pilot structure is more suitable for IEEE802.16 system. An optimal pilot setting algorithm, based on space frequency domain, is explored and the pilot chart is presented. The proposed algorithm finds its application in MIMO-OFDM. Simulation results show the algorithm presents a good approximation to the perfect channel state information curve, with about 2dB difference in SNR. The simulation results also demonstrate the algorithm achieves fairly high stability in the environment of fast fading, performance of the proposed algorithm is better that of pilot training channel estimation.3. Taking into account the characteristics of IEEE802.16 OFDM system, OFDM system simulation platform is constructed in Matlab, exploiting simulink as a tool. OFDM modulation and demodulation simulation system are configured on LabVIEW platform. All the system signal processing is simulated, including defining system parameters, designing modulation model, and verifying all the proposed algorithms under different environments, such as white Gaussian noise, multi-path fading, with or without guard interval etc. Bit error performance is evaluated. The research provides valid theoretical basis for practical OFDM system performance evaluation.4. Taking advantage of software radio, the paper designs a hardware platform with both 256-IFFT/FFT and 512-IFFT/FFT OFDM schemes co-existing in one platform. You can predetermine one from the two schemes to carry out almost the same model function with different system performance and parameter setting.5. Referring to IEEE802.16 standard, the paper proposes a design method for generating signals and frames suitable for laboratory investigations implemented in laboratory environment.6. Based on 6701evm digital evaluation card, combined with analogy front-end, the paper designs a DSP software model to deal with baseband signal processing. An overall OFDM scheme, with modulation and demodulation function, is accomplished.

讨论分析了MIMO-OFDM中一种基于空频域的最优导频设置算法，给出了导频图案，通过仿真实验表明，该算法与理想的信道状态信息曲线非常接近，信噪比差距约在2dB左右，并且在快衰落条件下具有较好的稳定性，其性能要优于基于前导训练的信道估计方法。3、根据IEEE802.16OFDM系统特点，论文分别在Matlab中应用Simulink工具构建OFDM系统仿真平台、在LabVIEW平台上实现了OFDM调制解调仿真系统，模拟了整个系统的信号流程，进行了OFDM仿真系统参数的选择和调制模块的仿真设计、论证各算法性能，并根据各种不同的条件：例如高斯噪声、多径衰落、有无保护间隔等，对系统的误码特性进行了评估，为正确评价实际OFDM系统的性能提供了有效的理论依据。4、论文以软件无线电思想作为指导，提出了以256点IFFT／FFT为核心和以512点IFFT／FFT为核心的两种OFDM算法模式并存于同一个硬件平台、且可预选的方案，它们在参数选取和性能指标上有所差异，均实现了相似的模块和功能。5、论文参考IEEE 802.16无线网络标准的参数设置，针对本设计系统的应用环境和系统硬件的性能速率，提出了一种应用于实验室环境的信号结构、帧格式等参数设计。6、论文基于TI公司的6701evm数字评估板卡，结合模拟前端搭建数字中频平台，设计了基带处理的DSP软件模块并进行系统调试，基本实现了一套完整的OFDM调制解调方案。

Alternatively, the con- trollers can use the synchronous rectifier itself or loss- less inductor current-sensing methods to provide overload protection with lower power dissipation.

另外，康威特罗勒斯可以使用同步整流器本身或亏损减少电感电流检测方法，以提供低功耗过载保护。

Mr. Dauber's other Schatz hangs in his home movie studio.

多伯把沙兹的另一件作品挂在家里的电影室。