模转换

Equipped with AT89C51,the temperature sensor and the modulus convertor and coordinated by soft and hard wares,the system can fufil the instantaneous gathering of multichannel temperature signal,then,by meaus of asynchronous string communication,send the digital signal to PC which can separately display the instantaneous value and the average value of each channel temperature in bar diagram and weblike form,and print the temperature curve graph through data scale transferring,analyzing,and collating.

该系统运用单片机AT89C51、温度传感器保温器及模数转换器，通过软硬件的配合，实现了多路温度信号的实时采集，用异步串行通信发送数字信号到PC机，PC机经过数据的标度转换、分析、整理，分别用棒状图和网状表格显示各路温度瞬时值和平均值，打印出静态降温调温曲线图。

Based on the relation between modal amplitude and phase in the mode conversion of the few mode fiber, a novel configuration of an asymmetric biconical fiber and a fiber mode converter is presented to realize the nonreciprocal propagation in optical fibers. Preliminary feasibility is demonstrated both theoretically and experimentally.

基于少模光纤中模式转换的振幅和相位关系，提出采用不对称双锥光纤与光纤模式转换器的组合结构实现光纤中非互易传输的技术构思，从理论和实验上进行了初步的可行性论证。

The collimator neutron flux is drawn from the horizontal channel by the use of SPRR-300 as a neutron resource. The convector made of 6LiFZnS and the long focus professional twilight lens with the small field of view are used, and the digitalized CCD camera is developed by the use of scientific grade CCD chip, the double thermocouple refrigeration and 14bit A/D convector. The image grabbing, processing and analyzing software of double bytes has been developed by the use of Visual C++ and C++ Builder, and the facility of anti-radiation for CCD is set up.

采用6LiFZnS材料中子转换屏、长焦距、小视场专用微光镜头等光学组件，利用科学级CCD芯片、两级热电偶制冷技术、14bit模数转换技术研制了数字CCD摄像机，采用Visula C++和C++ Builder为工具，开发了双字节图像采集处理分析软件包，并设计了成像系统辐射防护装置，构成了热中子数字成像系统。

We used coupling phototube convert the voltage of reflector voltages of klystron linearly to lower voltage, and convert the lower voltages of standing wave measuring line and crystal detector inputting power linearly to higher voltages by operation amplifier. Then we inputted these voltages to computer by analog-to-digital card and plotted the graphs of working characteristics of reflecting klystron with software .

利用光电耦合器将速调管反射极高电压线性转换为低电压，同时将驻波测量线测得电场强度的电压值和晶体检波器所测得的反射式速调管输出功率的电压值通过运算放大器线性放大，然后经过模数转换卡采集到微机中，利用软件绘制出速调管的工作特性曲线。

The authors used coupling phototube convert the voltage of reflector voltages of klystron linearly to lower voltage and converted the lower voltages of standing wave measuring line and crystal detector inputting power linearly to higher voltages by operation amplifier. Then inputted these voltages to computer by analog-to-digital card and plotted the graphs of working characteristics of reflecting klystron with software.

利用光电耦合器将速调管反射极高电压线性转换为低电压，同时将驻波测量线测得电场强度的电压值和晶体检波器所测得的反射式速调管输出功率的电压值通过运算放大器线性放大，然后经过模数转换卡采集到微机中，利用软件绘制出速调管的工作特性曲线。

Finally, the run-length of data points are extracted by horizontal projection, and the modules corresponding to the run-length are taken to decode.

而拍照所造成条码边界的形变，利用反透视转换(Inverse Perspective Transformation)来校正。最后以水平投影的方式撷取出资料点的长度，转换成对应的模组来进行解码的动作。

Based on the foregoing strategy, we choose Inverse Modified Discrete Cosine Transform and Polyphase Synthesis Filterband of the MP3 decoder by an ASIC implementation. Moreover, to further reduce the hardware cost, we use CORDIC-based calculations and merging some arithmetic operations to replace the original ones of IMDCT and PSF.

基於前述的原则及由运算量的统计分析，我们选定「反转修正式离散余弦转换(Inverse Modified Discrete Cosine Transform， IMDCT)」与「多相位合成滤波频带(Polyphase Synthesis Filterband， PSF)」使用ASIC方式实现，同时为了有效降低这两个模组的硬体成本，我们导入「座标轴旋转数位计算机」及合并运算方式取代原始算术运算，使得新的计算式有效降低原IMDCT约74%之乘法及约49%加法运算，而在多相位合成滤波频带的反离散余弦转换也有降低约33.4%之乘法及约24.6%之加法运算。

Function is to convert the use of one-chip ADC is the voltage transformation selection.

功能是使用片内模数转换器转换一个正选拨变换的电压。

The paper provides the design of battery supervision and control module for local telecommunication power supply supervision and control system, including the signal preadjustment circuit, on-line range conversion circuit and analog to digital conversion circuit.

文章对本地用通信电源监控系统中下位机模拟量采集模块的设计进行了深入研究，包括信号预调理电路、量程在线转换电路以及模数转换主电路等。

The data traffic is accomplished through the SCM and RS232 serial communication interface;the LCD1602 screen is used to display the pH value in real time. The C language is adopted to prepare control procedure in the software design,and the Visual C++ software is used to prepare the computer monitoring interface,so that the teledata monitoring can be finished easily.

硬件设计以AT89S52单片机为控制核心；传感器采用pH复合电极；为了与传感器的高内阻匹配，信号调理采用CA3140、UA741等运放构成三级放大电路；利用ADC0809模数转换器实现A/D转换；通过单片机与RS232串行通信口完成数据通信；使用1602液晶器实时显示pH值。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。