查询词典 perfect square

Located in the heart of Times Square and the Broadway theater district, this Midtown Manhattan hotel is perfect for weekend getaways, family and business travel.

这家曼哈顿市中心的酒店座落于时代广场和百老汇剧院区的中心，非常适合周末逍遥游、家庭旅游和商务旅游。

The company's existing more than 300employees, more than 50 technicians, collect development, design, manufacture and sales in one of the modern enterprise, the company currently has two production bases, which are located in Lu-qiao-Huang-lang and Jiao-jiang-tai-he Industrial Zone ,covers area about 40,000 square meters, To achieve a die-casting, CNC machining, heat treatment processing, painting and assembling the five automatic production processOur company own CNC etc advanced production equipment;more than 99% self-made products; a full range of testing equipment and perfect modern management system so that the quality of the product to be a strong guarantee, the company has developed pneumatic wrench, pneumatic-grease pump and air hose reel etc more than 100 varieties products series, the product passed the CE certification, selling all over the world, our company enjoy a higher reputation at home and abroad

公司现有300多名员工，其中工程技术人员50多人，是集开发设计、制造销售于一体的现代化企业；目前公司拥有两个生产基地，分别位于椒江太和工业区和路桥黄琅工业区，占地面积4万平方米，实现了产品压铸、CNC加工、热处理加工、涂装、装配五大工艺自动化生产；拥有进口CNC数控等先进生产设备，产品自制率高达99%；齐全的检测设备和完善的现代化管理机制使产品的质量得到了有力的保证；公司已形成风扳、注油器、绕线器等系列100多个品种，产品通过了CE认证，畅销世界各地，在国内外同行中享有较高的声誉。

Multi-input multi-output system ; perfect space-time block codes ; minimum mean-square error decision feedback equalizer ; Fano algorithm

多输入多输出系统；完美空时分组码；最小均方误差—判决反馈均衡； Fano算法

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。

Periodic fluid pulsation in aeroplane hydraulic piping could induce fluid-construction vibration and lead to fatigue damage. It is impossible to find the error sensor's optimization location because of the pressure standing wave, and the pulsation attenuation effect is not perfect when adopting pulsation attenuation at single point. For this reason, a distributed active control method of fluid pulsation was presented. To avoid stationary point in all aviation states, several fluid pulsation actuators and error pressure sensors were placed along the piping. The second fluid pulsation produced by actuators can counteract the primary pulsation brought by aviation piston pump and make the mean pulsation of whole piping minimum when adopting adaptive feed- forward control and the filtered-X least mean square algorithm.

针对飞机液压能源管路系统中的周期性流体脉动诱发流固耦合振动，导致管路疲劳损伤的问题，针对管路中存在压力驻波特性，在采用单点消振时寻找误差传感器最佳布局位置困难而引起脉动抑制效果不理想的缺点，提出了一种分布式流体脉动主动控制方法，即沿管路不同位置布置多个主动消振阀和误差压力传感器，在任意飞行阶段，避开压力驻波点，以误差压力传感器的脉动测量值为控制目标，采用一种针对周期脉动主动控制的自适应前馈控制法和多通道自适应滤波－X LMS算法，调整控制器参数，使主动消振器产生的次级脉动与管路中的初始脉动相互抵消，达到整个管路中的平均流体脉动最小的效果。

Factory covers an area of 5000 square meters, with standard four plants, 70 workers, technical personnel 10; have a size of electric welding machine, punching machine, cutting machine and other processing equipment 40 have advanced equipment and strong technology, perfect quality system , a sound sales network, excellent after-sales service, product finish of well-advanced technology, stable and reliable quality, reasonable price, prompt delivery, best-selling all over the country, exported to the United States, Japan, Germany, Australia and other countries, access to the vast number of customers alike.

本厂占地面积为5000平方米，拥有标准厂房4间，职工70名，技术人员10名；拥有大小电焊机、冲床机、切割机等加工设备40台，设备先进、技术雄厚、质量体系完善、健全的销售网络、优质的售后服务，产品选料精良、工艺先进、质量稳定可靠、价格合理、交货及时，畅销全国各地，远销美国、日本、德国、澳大利亚等国家，获得了广大客户的一致好评。

We should think the development perfect our own thought knowledge system that the square try, not the viewpoint try of make the democracy free success.

我们应该想方设法的发展完善我们自己的思想学问体系，而不是想法设法的让民主自由成功。

Laotse therefore announce that the perfect characters are these: He is square, but not cutting (sharp-cornered), has integrity but does not hurt others, is straight, but not high-handed, bright, but not dazzling.

为此，老子说了一套完整的人格模式：方而不割，廉而不刿，直而不肆，光而不耀。

On the basis of analyzing the theory of the modeling of the propeller surface, this paper transforms the section data given by design to the data in Descartes coordinates. Interpolates the section data to get enough data and fits the blade surface with the least square method. A perfect C2 blade surface can be obtained by adjusting the deviation weight and fairing weight. According to the cylinder rough, two rough cut methods are preferred.

本论文在深入分析螺旋桨曲面成型原理的基础上，将设计时给定的桨叶曲面的切面数据转化为笛卡尔坐标系中的坐标，利用B样条方法对截面数据点插值并加密，得到足够的数据点，进而利用最小二乘法拟合出桨叶曲面，通过调整偏离权和光顺权得到了理想的二阶连续的桨叶曲面。

Merdeka Square, where Malaysia declared independence in 1957, is perfect for the history lover.

自由广场——马来西亚在1957就是在这里宣布独立的-对于喜欢历史的人来说是完美的。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了