外围的

According to the demand of high magnetic field power supply, reference is increased with a set ramp rate and stops at a set stable value, so reference system is composed of digital setting and digit to analog converting circuit. But the stability of reference is mostly guaranteed by the performance of D/A circuit, so D/A circuit is particularly studied in reference system. The scheme of D/A circuit, the selection of DAC and its voltage reference, hardware anti-jamming design and PCB design are discussed in detail, and software of remote control and PLC are discussed in brief. Zero-flux DC current transformer well satisfies the demands of the high stability of Load current detection unit, so the principle of zero-flux DC current transformer is analyzed; in the mean time a project which detects the long term stability is designed. During 8 hours, analog signal which is detected with high precision digit multimeter is recorded in computer at 1HZ frequency by GPIB communication. The drift error source and related parameters are explained in the compare-amplify part. Detailed subtraction circuit is designed; also amplifier chip and periphery components are selected and verified according to the theory of error analysis.

根据强磁场电源的需求，参考源应按照软件设定的斜率逐渐上升到设定稳态值，则参考源系统应由数字给定和数模转换电路两大部分组成，而参考源的稳定度主要依靠完成数模转换功能的模拟电路的性能来保证，因此本文对参考源系统的研究以数模转换电路为重点，分别从电路方案的确定、数模转换芯片及其基准电压源的选取和验证、电路板硬件抗干扰和PCB设计几方面进行了论述，然后对数字给定部分的远控组态和PLC程序设计作了简要介绍；采用零磁通原理的直流电流转换器很好地满足了对负载电流检测单元高稳定度的需求，本文详细分析了零磁通检测的原理，并在选定此种类型电流转换器的基础上设计了一套检测长期稳定度的方案，8小时内以1秒为采样周期，通过计算机Labview程序和高精度数字电压表的GPIB通讯，将被高精度数字电压表数字化后的模拟信号采样值连续记录至计算机中；比较放大环节简要阐述了漂移产生的原因和相关参数指标，确定了具体的减法电路形式，并根据误差分析理论对运算放大器和外围元器件进行了选取和验证。

It expanded to 106119ha in 1973, descented to 99167ha in 1987, backed up to 112440ha, and attained the max value in history—123170ha in 1998 and descent to 109934ha again in 2001. GIS overlaying analysis shows that, the spatial change of Minqin Oasis had the different characteristics in different stage in the last 50 years: at the end of 50's to the beginning of 70%, oasis expandation Was performed by extension of origin oasis; the atrophia of oasis from the beginning from 70's to the 80's was performed by increasing of non-oasis spot pieces of inner part for oasis; the main performance of keeping on expanding of oasis from late 80's to late 90's is outside extension of Baqu oasis near the upper stream, with increased oasis area in interior of hungriness and increased area of non-cultivation in Huqu oasis in the north. From 1998 to 2001, opening up wideness in interior of hungriness continued, but hnngrinessization of oasis became worse. The oases in the Minqin Basin developed from small to large and back to small in terms of area changes, and from south to north then to south in terms of spatial changes.

绿洲分布图的GIS叠加覆盖分析表明，近50年来民勤绿洲的空间变化在不同阶段有不同的特征：50年代末至70年代初，绿洲扩展主要表现为已有绿洲的外延式扩大；70年代初至80年代后期的绿洲萎缩，主要表现为绿洲内部非绿洲斑块增加；80年代后期至90年代后期的持续扩展，主要表现为靠近上游的坝区绿洲向外围扩展和荒漠腹地绿洲面积的增加，而北部湖区绿洲弃耕面积不断扩大；98年至2001年，绿洲荒漠腹地的开荒还在继续，但湖区的绿洲荒漠化还在进一步加剧。50年来民勤绿洲的发展总体上经历了一个面积由小到大再到小，空间位置上从南而北再向南的迁移过程。

Based on the structure and work flow of the system, the thesis describes the design of the communication interface between the uncooled...

本论文按照处理机的工作流程，首先讨论FPGA与视频探测器之间的数据通讯模块的设计，接着介绍了图像预处理模块，在预处理模块中，重点介绍了一种改进的二维中值滤波方法和一种特别适于硬件实现的边缘检测算法；在第四章，讨论了用FPGA实现图像获取和模拟视频输出；第五章，讨论了FPGA与DSP之间以及FPGA与弹上机之间的通讯模块的设计，接着重点研究了一种新的Verilog语言的描述风格，并用此写法在上FPGA实现对外围设备的初始化模块；最后，对本文所做的工作进行了总结。

The results show that the variation of diameter of ATF yarn increases with increasing the over feed of peel filament, but the variation of average diameter decreases. When the polyester FDY is used as core filament, the structure of diacetate composite ATF is looser than the ATF with capron as core filament, and the unevenness of yarn core and outside are also greater. The ATF loops or hairiness mainly centre at the height 0.5 and 1.0 mm, the amount decreasing with the height increasing, with exponential distribution. When the over feed of peel filament enhances, the number of loops or hairiness decreases at the height of 0.5 mm, while other height of loops or hairiness increases.

结果显示：空变丝纱芯直径的变异随皮丝超喂提高而增加，但平均直径的变异却呈下降趋势；以涤纶FDY做芯丝时，二醋酯长丝复合空变丝的结构较芯丝为锦纶的空变丝松散，纱芯和外围不匀程度也相对较大；空变丝丝圈丝弧或毛羽主要集中在高度为0.5mm和1.0mm的位置，其个数随高度的增加而不断减少，基本呈指数分布；皮丝超喂提高时，0.5mm高度的丝圈丝弧或毛羽个数减少，其他高度的丝圈丝弧或毛羽个数则增加。

As the electrical level array of rotary keyboard is different when positive and negative circumvolving, the direction can be judged by comparing the electrical level of A and B phase.

本题目利用Mega16单片机以及外围电路，以C程序设计语言为基础，通过使矩阵式键盘的行端口循环输出一定的电平，接着读取列端口的电平，经过比较就可以实现对矩阵式键盘的扫描，因为旋转编码器的正反方向输出电平序列的不同，因此通过对其输出端A和B的相位进行比较即可实现对旋转编码器的方向判定。

Through circularly exporting certain electrical levels on the rows of matrix keyboard, the electrical levels of the lines will be read, then the aim of scanning matrix keyboard will be realized by comparing the output and input. As the electrical level array of rotary keyboard is different when positive and negative circumvolving, the direction can be judged by comparing the electrical level of A and B phase.

本题目利用Mega16单片机以及外围电路，以C程序设计语言为基础，通过使矩阵式键盘的行端口循环输出一定的电平，接着读取列端口的电平，经过比较就可以实现对矩阵式键盘的扫描，因为旋转编码器的正反方向输出电平序列的不同，因此通过对其输出端A和B的相位进行比较即可实现对旋转编码器的方向判定。

Lubrication for timing chain is supplied at two points; by a feed from the front the camshaft bearing into the periphery of the camshaft chain wheel and also by oil fed through the hollow shaft on which the timing chain jockey pulley is mounted arid thence through holes in the circumference of the jockey pulley.

给时间安排链的润滑在二点被供应；被饲养从前面凸轮轴举止到凸轮轴链轮子的外围以及藉着油喂过了空的桥在哪一个之上时间安排链赛马的骑师滑车被展开干燥的从那时起完成的洞在赛马的骑师滑车的圆周中。

However, the same symbol of school architecture is used for a different purpose in Taiwan: Torii is the image regarded as the entrance to the sacred space. Placing Torii around schools became a metaphor showing that "schools" are as sacred as "temples." In fact, during the occupation of Chin Dynasty, schools in Taiwan are derived from "temples." Going to school in temples had been a stereotype deep in people's mind. Although this symbol was similar to the way how European school buildings symbolized campanili of churches, the symbol of "colonizing" was emphasized.

但是，类似的学校建筑元素被放在台湾却有著不同意义：把代表神圣空间入口意象的「鸟居」，放在校园的外围旁，这同时也隐喻著「学校」也等同於「寺院」的神圣地位；事实上，在清朝据台时期，学校英文音译的发展就是从「寺庙」里产出：去寺庙就学的既定印象已深植民心，这种作法虽然略同於欧洲学校原型的教堂的钟塔宗教性象徵，但背后的「殖民」象徵却很清楚的被突显出来。

I in relation to a unit enclosed by walls, the floor area of such unit (which shall include the floor area of any balconies and verandahs), measured from the exterior of the enclosing walls of such unit except where such enclosing walls separate two adjoining units in which case the measurement shall be taken from the middle of those walls, and shall include the internal partitions and columns within such unit; but shall exclude the common parts outside the enclosing walls of such unit Provided That if any of the enclosing walls abut onto a common area, then the whole thickness of the enclosing walls which so abut shall be included

i 如属由墙壁围起的单位，则指单位的楼面面积（包括任何露台及阳台的楼面面积），由单位围墙外围起计，但如围墙分隔两个毗连单位，则须由墙壁的中央起计。单位的楼面面积并包括单位的内部间格及支柱，但不包括单位围墙外的公用部份。如任何围墙邻接公用地方，则包括该围墙的整个厚度

Installation Bundled with car alarm and save technician time and simplify wiring tasks compared with installation of two separated systems in one car Management Powerful graphical user interface for rapid understandings of tyre status Two-way vehicle security system to secure car Real-time monitoring of tyre pressure and temperature is also achieved to allow users to get information immediately Beep sound when start engine to remind driver TPMS is ready One remote controller can monitor both tyre pressure and secure car from burglary Reliability and Robust All sensors are locked with special tool All major components are swappable in case any component is broken Strict environmental test has approved its lifespan can last for up to 10 years Provides signal accessibility by providing peripheral signal integrity technology Receiver has fuzzy to learn IDs from original sensors and spared sensors Extremely lightweight, tiny size and special mechanical design of sensor have won TD-3000A the best TPMS system in this industry

安装 与在一部汽车上安装两个单独的系统相比，我公司产品附加了汽车报警器，节省了技术时间，简化了配线任务操纵强大的图像界面，可快速把握轮胎状况双向车安全系统，确保汽车安全胎压和温度实时监控系统，使得用户可立即获取相关信息发动机启动时会发出嘟嘟的响声，提醒驾驶员TPMS已预备就绪遥控器可监视胎压并确保汽车防盗可靠强劲所有的传感器由非凡工具锁定所有主要元件可置换，以防任何元件出现损坏严格的环境测试证实该产品的使用寿命可达10年通过外围信号完整性技术可接收信号接收器可从原始传感器和备用传感器模糊接收标识部分的信号传感器重量极轻，尺寸小巧以及非凡的机械设计使TD-3000A在业内赢得了&最好的TPMS系统&荣誉。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。