查询词典 difference frequency

In 110 Xinjiang unrelated healthy Uygur subjects, 27 alleles were detected in HLA-B loci. Of them, B * 35 and B * 51 were the most common alleles with an allele frequency of 0.1136 and 0.1136, respectively; while B * 41, B * 56 and B * 78 were the rare alleles with a frequency of 0.0045, 0.0045 and 0.0091, respectively. Frequencies of "Caucasoid origin" HLA alleles such as B * 08, B * 35 and B * 50 in Xinjiang Uygurs were higher than other ethnic groups in China.

在维吾尔族样品中共检出27个等位基因，其中高频率的等位基因为B*35(0.1136)和B*51(0.1136)，低频率的等位基因为B*41(0.0045)、B*56(0.0045)和B*78(0.0091)，B*08、B*35、B*50等"高加索人"起源的HLA基因在新疆维吾尔族的分布频率高于国内其他民族，与高加索人种的数值相当。

In order to improve the operation frequency, the self-suck resonator pulse detonation engine was founded, the ignition principle of the new engine use the method of shock focus autooscillation, so, it possess high ignition and operation frequency, many experts have taken experiment and numerical simulation. However, the physical processes in the resonator cavity are very complicate,the reliable theory haven't set up by now, require the further study.

为了提高脉冲爆震发动机的工作频率，自吸气共振型脉冲爆震发动机模型被提出，该新型发动机点火原理采用激波谐振聚焦点火方式，具有很高的点火及工作频率，许多专家对此进行了实验研究和数值模拟，但由于谐振腔内的物理过程非常复杂，到目前为止没有一套可靠的理论，有待于进一步研究。

At the central frequency of the reduced units 0.5(ωa/2πc), when the transmission band of photonic crystaln is completely inside the band gap of photonic crystalmm, both sharing the same central frequency as their symmetry centers, mirror symmetrical photonic quantum well is formed.

针对光子晶体mnm模型，选择适当的结构参数，通过传输矩阵法对其透射谱进行计算模拟发现，在归一化中心频率0.5(ωa/2πc)处，当光子晶体n的导带处于光子晶体mm的禁带中，且两者均以中心频率处为对称中心时，构成镜像对称的光子晶体量子阱结构。

The existing problems in distributed frequency control are pointed out and a basic structure of centralized frequency control is given.

还指出了分散式频率控制存在的问题，并给出了集中式频率控制的基本结构。

Firstly, oscilloscope control system based on GPIB technique is presented with friendly operation environment to the HIFU system, and it uses multithreading technique in programming to realize real-time recording and display of the signal; Secondly, temperature collection and data recording system is designed, which also could get real-time recording and display of the 16 channel temperature signal, and it's believed to be of great use for further experiments of the HIFU system; Thirdly, multiple ultrasonic phased array's phase shifter is designed,which could provide 8-bit phase control in a range of frequency where the centrical frequency is 1MHZ. Fourthly, the module of serial communication is realized to insure the communication between devices and computer, including both synchronous and asynchronous communication, which enables the system to transfer data reliably and stably; Finally, the module of digital quantity control is accomplished, which provide for upper application the consistent solution to the control of exterior devices via digital interface. It can get or set the devices state using interrupt mode to receive input signal or send output signal.

主要有以下几个方面：设计了基于GPIB的示波器控制系统，给课题的研究工作提供了一个良好的环境，它采用了多线程编程的方法，能够较好的实时显示当前波形并记录数据；设计了温度采集和数据记录系统，能够对16路温度信号进行并行同步的实时采集，用于HIFU剂量学研究中温度场检测和医疗评价；设计了相控阵相位延时电路并且通过调试，满足了课题的相位控制的要求，在中心频率为1MHZ左右的频率范围内都能够达到8-bit相位控制；实现了串口通讯模块，为各项设备与计算机之间的通讯提供保证，它提供同步和异步的通讯能力，使系统能够可靠稳定的传输数据；建立了数字量控制模块，为上层应用程序提供一致的方法使用数字接口控制外部仪器，它使用中断的方式来接收输入或输出设定的开关量信号，从而得到或设定各种仪器的状态。

The frequency characteristics expression and the characteristic matrix are derived, and the influence of the filter parameters on frequency characteristics is investigated.

导出了频率特性表达式和频率特性矩阵，分析了滤波器参数对稳态频率特性的影响。

The surface electromagnetic is expanded in a polynomial function via the Chebyshev approximation , then the electromagnetic distribution can be obtained at any frequency within the given frequency range , which is used to compute the scattered fields and the wideband radar cross section .

论文摘要：将切比雪夫逼近理论应用于目标宽带电磁散射特性分析中，通过求解给定频带的切比雪夫节点并用高阶有限元方法求得各节点处的目标表面场值，实现整个频带内任一频率点目标表面场值的快速预测，使得目标电磁散射特性得到快速分析。

The researched results show that only when excess frequency equal to the natural frequency of chlorophyl the electronics transition occur. This would induce that the chlorophyll absorbs 432um blue light and 662um red light.

研究结果表明：只有外场频率与叶绿素的固有频率相等时电子才发生跃迁，从而导致叶绿素吸收中心波长432nm的蓝光和662nm红光。

Diode switches or voltage controlled varactors implement dual-band resonators such that they can offer low impedance at the second harmonic of each frequency band, while, in some cases, presenting high impedance at the fundamental frequency as an RF choke circuit.

利用二极体开关或电压控制变容器实施双频共振器以提供在双频操作中每一个频段之二阶谐波的低阻抗，同时在一些实施例里也提供主频段的高阻抗、具有射频阻塞电路作用。

Now the company's main business has: AC-DC, AC-AC, voltage converters, choke, inductor coil, filters, transformers, power transformers, all types of special transformers, the total frequency, high-frequency transformers and various types of switching power supply, etc.; and in the domestic set up a sound distribution network of electronic components.

现公司的主要经营项目有：AC-DC 、 AC-AC，电压转换器、扼流圈、电感线圈、滤波器、互感器、电源变压器、各类特种变压器，共频、高频变压器及各类开关电源等；并在国内建立了完善的电子元器件分销网络。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。