查询词典 modulator

It is one of the key pathogeneses of postmenapausal osteoporosis that estrogen deficiency leads to the decrease of OPG、TGFβ expression and the increasing expression of some bone-resorbing cytokines as OPGL、M-CSF and TRAIL, then stimulates osteoclast differentiation and activity, which potentiates bone resorption and bone loss:(2) ICI182780 shows partial transactivating function in osteoblasts, so it should belong to a kind of selective estrogen receptor modulators .

雌激素缺乏可能导致HOB中OPG、TGFβ的表达减少，而解除了对OPGL、M-CSF和TRAIL等刺激OC生成和活化的细胞因子的抑制作用，OC的数量和活性增加，导致骨吸收增强和骨量丢失，这是导致绝经后骨质疏松症的一个重要的发病机制；ICI182780在成骨细胞内表现出促转录活性，因此它并非纯ER拮抗剂，而应属于选择性雌激素受体调节剂(selective estrogen receptor modulator，SERM)。

The modulator quantizes the input signal and move the low frequency inband quantization noise to high frequency.

调制器完成对输入信号的量化并对量化噪声进行整形，将有用信号频带内的低频噪声搬移至高频段。

Chapter 5 improves the antenna switch, phase-locked loop and frequency modulator circuits of the existing VHF FM transceiver so that the improved VHF FM transceiver can combine with the hardware composed of a high speed DSP chip TMS32010 and a single -chip microcomputer 8031 to become the TD-SFD digital radio set.

第五章对现有超短波单工电台的天线转换开关、锁相环、调频等电路进行了改造以使得改造后的电台配接TMS32010、8031组成的硬件系统成为数字时分同频双工电台。

Secodely , introduces the FPGA implementation of the DVB-T coder and modulator , some of the core arithmetic , such as , inner coding , inner-interleaving ( bit-wise / symbol interleaver ), signal constellations and mapping , OFDM frame structure are detailed .

然后，详细描述了DVB-T信道编码调制器中的部分核心算法的FPGA电路设计、调试和实现，包括内编码、内交织(包括比特交织和符号交织)、星座映射、帧形成等。

Four 8-bit I/O Ports C Three 16-bit Timer/Counters C 256 Bytes Scratch Pad RAM C 8 Interrupt Sources with 4 Priority Levels C Dual Data Pointer Variable Length MOVX for Slow RAM/Peripherals High-speed Architecture C 10 to 40 MHz in Standard Mode 16K/32K Bytes On-Chip ROM Program T80C51RD2 ROMless Versions On-Chip 1024 bytes Expanded RAM C Software Selectable Size (0, 256, 512, 768, 1024 bytes) C 256 Bytes Selected at Reset for AT87C51RB2/RC2 Compatibility Keyboard Interrupt Interface on Port P1 8-bit Clock Prescaler 64K Program and Data Memory Spaces Improved X2 Mode with Independant Selection for CPU and Each Peripheral Programmable Counter Array 5 Channels with: C High-speed Output C Compare/Capture C Pulse Width Modulator C Watchdog Timer Capabilities Asynchronous Port Reset Full Duplex Enhanced UART Dedicated Baud Rate Generator for UART Low EMI Hardware Watchdog Timer (One-time Enabled with Reset-out) Power Control Modes C Idle Mode C Power-down Mode C Power-off Flag Power Supply: 2.7V to 5.5V or 2.7V to 3.6V Temperature Ranges: Commercial (0 to +70C) and Industrial (-40C to +85C) Packages: PDIL40, PLCC44, VQFP44

四8位I / O端口C款三16位定时器/计数器 256字节RAM的便笺簿 8中断源4优先级和C双数据指针MOVX在缓变长内存/外设高速架构为C 10至40 MHz的标准模式16K/32K字节的片上ROM程序T80C51RD2无ROM版本片1024字节扩展RAMC软件可选尺寸（0，256， 512，768，1024字节）C选取在重置为AT87C51RB2/RC2兼容键盘中断接口与独立的选择港口小一8位时钟分频器64K的程序和数据存储器空间的改进X2模式的CPU和256字节每个外设可编程计数器5通道的阵列：C型高速输出C比较/脉宽调制器捕获看门狗定时器复位功能异步端口全双工增强型UART的波特率发生器的UART低EMI硬件看门狗定时器电源控制模式空闲模式C掉电模式C断电旗电源：2.7V至5.5V或2.7V至3.6V温度范围：商业（0到+70 C）和工业（- 40C至+85℃）封装：PDIL40，PLCC44，VQFP44

Utilizing an external modulator, we can up-converse vector signals without electrical mixer based on single side band with carrier suppression.

我们提出了一个新颖的全光升频直接侦测多级格式正交多频分工系统。

In order to improve the carrier suppression factors Psup of the microwave ferrite modulator, the condition for maximum energy translation from the carrier to the sideband has been found through a mapping process by which a message space is mapped onto a signal space.

本文从提高微波铁氧体调制器的载波抑制度P _出发，从信息空间到信号空间的一般映射过程中找出载波能量最大限度转移到边带的条件。

The filters require close component matching to guarantee that carrier and single-sideband suppression—key measures of quadrature-modulator ideality—do not degrade as a function of baseband frequency.

滤波器需要匹配精密器件，确保载波和单边频带抑制——理想积分调制器的关键——作为基带频率不能降级。

Carrier suppression double sideband optical signal with 40 GHz repetitive frequency is generated by using an optical phase modulator along with optical filtering technique.

在中心站采用相位调制器结合滤波的方法产生重复频率为40 GHz的载波抑制双边带毫米波信号，利用交叉复用器分离开毫米波信号的上下边带，其中的一个边带强度调制数据速率为2.5 Gbit/s的下行基带信号，另一个边带被发送到基站调制上行传输的基带数据。

Allosteric enzymes may have more than one modulator.

它可以有一个或多个调节物。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。