查询词典 frequency conversion

On the basis of analysis and comparison of conventional and some modern dielectric loss measurement methods in this paper, considering the difficulty consist in the dielectric loss measurement, such as the problem of the locale measurement of dielectric loss the suffering the interference of the electric field in the electrified wire net, the influence of harmonics and the leakiness of frequency spectrum due to the change of the frequency in power supply etc. a new measurement method which the frequency conversion anti-jamming technology combines the fundamental waves phase detachment method is presented.

论文在分析了传统介质损耗测量方法和现代介质损耗测量方法的基础上，针对介质损耗检测中存在的技术问题，如现场测量时工频电网强电场干扰问题、高次谐波影响问题、供电电源频率改变所引起的频谱泄漏和栅栏效应等问题，提出了采用变频抗干扰技术和基波相位分离法相结合的新型测量方法。

Also included is a conversion unit that converts a receiving signal of a first frequency band received via the antenna duplexer into a second frequency band lower than the first frequency band.

还包括转换单元，该转换单元将经由所述天线双工器接收的第一频带的接收信号转换为比所述第一频带低的第二频带。

The Invention involves a semiconductor conversion device, more specifically, a conversion device involving power conversion and power amplification.

本发明涉及半导体转换器件，更具体地涉及功率转换和功率放大应用的转换器件。

Meanwhile, it was difficulty to apply angle conversion system to practical goniometry curcuit. The fast following-up conversion was improved and a high-precision dynamic goniometer system and a nonlinear high-speed following-up conversion mode based on inductosyn were proposed, which were applied to the serve system of some weapon. The results of the dynamic and static tracking indicated that the servo system with fewer errors could satisfy the requirements of the accuracy.

对快速跟踪型轴角转换方法进行了改进，提出了一种基于感应同步器的高精度动态测角系统及非线性快速跟踪型转换方式，并在某武器伺服系统中进行了应用，动静态跟踪结果表明该伺服系统的误差较小，满足精度的要求。

Meanwhile, it makes it difficult to apply angle conversion system to practical goniometry curcuit. The paper makes improvement on the fast following-up conversion and proposes a high-precision dynamic goniometer system and a nonlinear high-speed following-up conversion mode based on inductosyn. It analyses the causes contributing to the error and deduces the expression bf the basic goniometry errors caused by output signal inaccuracy, and also puts forward the bounds on error of axis-to-angle converting.

对快速跟踪型轴角转换方法进行了改进，提出了一种基于感应同步器的高精度动态侧角系统及非线性快速跟踪型转换方式，分析了产生轴角转换误差的主要原因，推导出由输出信号误差引起的基本测角误差表达式，并提出了轴角转换的误差界。

The conversion boundary of self-incompatibility was researched by sowing by stage. Sunshine of day and temperature was studied critically by investigating leafage and researching traits indoors. The results showed that the daily minimum temperature was the principal factor of affinity conversion and the affinity conversion boundary was 16.5~18.1℃.HE97 was primarily regard as self-incompatible line in this research. The method was by inbreeding and sib HE97, Half the silk of HE97 and Zheng58. Inbreeding and cross have been done simultaneously. The extending condition of pollen tube was observed by dying the silk after pollinating 4 hours. The individuals with pollen tube were observed having seeds, while the individuals without pollen tube were observed having few seeds or no seeds. So this study regard HE97 as sporophytic self-incompatibility .The planting ration of female parent HE97 and male parent 87-1 was 4:1.The nature cross-pollination was studied by the theory of endosperm xenity, the study show that the setting percentage of HE97 was 625%, in which the seed in self was 70% and the seed in hybrid was 30%. This was consistent with the study of silk anatomy structure, then come to the same conclusion: compatible pollen germination and fertilization can stimulate the self-incompatible pollen germination and fertilization in the same corn cob.

通过分期播种，进行了光温敏自交不亲和材料HE97亲和性转换区间的研究，依据田间跟踪调查叶龄及室内考种研究了HE97亲和性转换区间的光温临界值，结果表明：1日最低温度是影响HE97自交不亲和性的主要原因，亲和性转换区间在16.5℃～18.1℃之间。2通过HE97自交和姊妹交以及将HE97与郑58作为双亲，各自的花丝一分为二，分别正反交，授粉后4个小时分别取其花丝进行固定、染色，观察花粉管的伸长情况，根据结实率与花粉管伸长的对应关系，结果发现观察到花粉管的对应植株收获到了种子，而没有观察到花粉管的对应植株结实率极低或没有结实，本研究把HE97初步划为孢子体自交不亲和类型。3以HE97为母本，87-1为父本，按4母：1父行比，通过花粉直感效应研究天然异交率，结果母本HE97结实良好(62%)，其中自交粒占70%，异交粒占30%，结合花丝切片观察表明，亲和花粉的萌发及受精会导致落在同一果穗柱头上不亲和花粉的萌发不再受抑制。

MATLAB realization of a unit with the conversion process, including quality and length of unit conversion unit conversion.

一个用MATLAB实现的单位转换程序，包括质量单位转换和长度单位转换。

For example, SSE 180 Index constituent stocks of the stock conversion rate does not exceed the maximum 70 percent, the highest rate of other stocks listed on the conversion does not exceed 65 percent; open-end exchange-traded index fund does not exceed the maximum conversion rate of 90%; treasury discount rate does not exceed the maximum 95%; other listed securities investment funds and bond discount rate does not exceed the maximum 80%.

例如，上证180指数成份股股票的转换率不超过百分之七十的最高，关于转换的其他股票比例最高不超过百分之六十五，开放式交易所交易的指数基金不超过最高转化率90％；国库折扣率不超过95％的最高，其他上市证券投资基金和债券折扣率不超过80％的最高。

Bi-conversion UPSs operate in serial regulating work mode, on-line interactive UPSs in parallel regulating work mode, and DP300E circuits in serial-parallel regulating work mode which improve the performance of single-conversion and bi-conversion UPSs, and make themselves of high efficiency, stability and reliability.

双变换UPS工作于串联调整工作模式，在线互动式UPS工作于并联调整模式，而DP300E的电路则工作于串、并联联合调整的模式，提高了双变换和单变换UPS的性能，使之具有很高的效率、稳定性及可靠性。

In the process of conversion, anti-conversion of Goss Projection and the conversion between geographic coordinates and space rectangular coordinates were also applied.

成功地解算出了WGS-84坐标系与西安80坐标系之间转换的三参数，并且通过实测检验得到了较高的精度。

Who? I never heard of him, Paul said, before asking teammate James Posey if he had heard of him.

赛后，科比说，他一直都是一名非常出色的射手，今天他打得很棒。

When I joined the company, I rotated around the different sections.

我加入这个公司时，轮换过几个不同的部门。