可达点

Although the production of relatively small achromatic and apochromatic refractor telescopes of up to 15cm, and catadioptic systems of up to 18cm, all with a variety of accessories at Jena would continue until 1994 when it was realized that Zeiss could not compete in the world market; the Zeiss "APQ" refractor telescopes optics were among the finest in the world but the inability to Zeiss to adapt these products promptly to the realities of a free marketplace assured their demise.

虽然耶拿厂可以生产相对小点口径的消色差和复消色差折射望远镜（口径最大可达15cm），还有口径最大可达18cm的反射折射望远镜系统，而且产品规格类型丰富，但蔡司在1994年还是意识到，不能在此类产品的世界市场上继续竞争了；蔡司的"APQ"系列折射望远镜产品确实属于世界顶级产品之列，但蔡司不具备在自由市场经济环境下，迅速调整改进此类产品的能力，所以决定此类产品停产。

When high-intensity ultrasound acts on a liquid medi um, the cavitation can produce a high temperature above 5 000 K and a high press ure about 50 MPa at local sites, accompanied by a forceful impact wave and a jet with 400 km/h. The mechanical action can generate mechanical movement with high frequency whose acceleration can be 1 500 times of gravitational acceleration.

功率超声作用于液态媒质时，空化作用会在局部点产生 5 0 0 0K以上的高温和 50MPa左右的高压，并伴有强烈的冲击波和时速达 40 0km的射流，机械作用会产生高频变化的机械运动，加速度可达重力加速度的 1 50 0倍，这些独特的效应令其在化工领域中的应用越来越广泛。

And there is an approximate linear relationship between the momentum of the automatic mechanism and the length of the gas tube.

如β=〓与β=〓相比较（β角单位为弧度，其定义详见正文），前者与后者对应的气室最大压力之比可达65%，而对应的自动机动能之比可达60%；导气管内径对气室内气体压力冲量和自动机动能的影响存在极值点，且该极值点随导气孔的增大而有规律的增大；导气管长度对气室最大压力、压力冲量和自动机动能的影响呈单调递减规律，且自动机动量与管道长度之间近似符合一直线关系。

Modbus Plus An industrial networking system that uses token-passing peer-to-peer communications at data transfer rates of one megabit per second.

一种工业网络，它使用令牌环点对点通讯模式传输数据，可达一百万位每秒。

2KBPS. Modbus Plus An industrial networking system that uses token-passing peer-to-peer communications at data transfer rates of one megabit per second.

一种工业网络，它使用令牌环点对点通讯模式传输数据，可达一百万位每秒。

Homing project research of parafoil system on optimal control was developed. And the characters of it were analyzed and summarized. To solve the optimal control problem, some methods about pre-solver analysis and treatment were put forward, such as moving equations translated into frame of wind and normalized.

在最优控制的求解中，提出了向风坐标系转化、无量纲化等解前分析的思想，简化了计算，方便了加权因子的选择，使目标点可达与不可达的翼伞系统归航轨迹最优控制问题得到了统一的求解。

The use of a trough-shaped CRT shadow mask, distance of up to 0.24mm, it is a combination of SONY Trinitron and traditional grid-like mask mask punctate characteristics: pure flat two-dimensional extension of the trough-shaped mask, Compared to traditional point-like mask to space more available to more electronic liquidity to allow more light to reach the screen, the CRT image accuracy, brightness, contrast and color purity has been improved, so more light a clearer picture, and this structure is also conducive to the improvement of resolution and distance.

该显像管使用了槽状荫罩，点距可达0.24mm，它综合了SONY特丽珑栅状荫罩和传统点状荫罩的特点：纯平面两维伸展的槽状荫罩，比起传统点状荫罩来间隙更多，可得到更大的电子流通量，让更多的光线到达屏幕，所以显像管的图像精度、亮度、对比度和色纯度都有了提高，从而获得更亮更清晰的画面，而且这种结构也有利于分辨率和点距的提高。

In this study, six campaigns around Anping tide gauge, Tainan, were successfully performed and the collected GPS buoy data were processed with four types of precise ephemeris provided by IGS, including final product, rapid product, ultra-rapid product and ultra-rapid product with the use of PPP technique. Comparing the PPP results with DGPS, the differences reach 3~5 cm in the horizontal and 10 cm in the vertical with final product; 6~8 cm in the horizontal and 15 cm in the vertical with rapid product; 15~20 cm in the horizontal and 30~40 cm in the vertical with ultra-rapid product; 2~3 m in the horizontal and 3~4 m in the vertical with ultra-rapid product. In addition, the collected data were also processed by DGPS techniques using different reference stations to analyze the effect of various baselines. The results show that accuracy degrades when the baselines increase.

本研究在台南安平潮位站旁进行6次GPS浮标施测，首先利用与GPS浮标距离不同之GPS参考主站来进行差分定位，分析基线距离对GPS浮标定位成果的影响，由实验结果可得出基线越长则定位准确度越低；再以IGS提供之最终产品、快速产品、超快速产品(Ultra-Rapid product)之观测部分observed half、超快速产品(Ultra-Rapid product)之预估部分四种不同发布延迟时间的精密星历与精密时表改正资料对GPS浮标进行精密单点定位解算，与传统差分相对定位方法定位结果进行比较后，得出使用最终产品之平面方向均方根误差(Root Mean Square Error， RMSE)可达3~5公分，而高程方向均方根误差可达10公分；快速产品之平面方向均方根误差可达6~8公分，而高程方向均方根误差可达15公分；超快速产品观测部分之平面方向均方根误差可达15~20公分，而高程方向均方根误差可达30~40公分；超快速产品预估部分之平面方向均方根误差可达2~3公尺，而高程方向均方根误差可达3~4公尺。

This digital thermometer design uses the American DALLAS Semiconductor Company after DS1820 promotes one kind of advanced version intelligence temperature sensor DS18B20 takes the detecting element, the temperature measurement scope may amount to 0.0625 degree Celsius for the - 55--125 degree Celsius biggest resolution, may the direct readout measure the temperature to plant, moreover used the three-wire system and the monolithic integrated circuit is connected, reduced the exterior hardware circuit, has at the same time the characteristic which the low cost and easy to use it to have the microminiaturization, the low power loss, the high performance, the anti-jamming ability strong, easy to match merits and so on microprocessor, the especially qualify in constituted the multi-spot temperature observation system, might directly the temperature inversion serial digital signal for microcomputer processing, moreover each piece of DS1820 had onlyThe product number and may store in its ROM, in order to constitution large-scale temperature observation system time hangs on the single track meets willfully many DS1820 chips.

本数字温度计设计采用美国DALLAS半导体公司继DS1820之后推出的一种改进型智能温度传感器DS18B20作为检测元件，测温范围为-55——125摄氏度最大分辨率可达0.0625摄氏度，可以直接读出被测温度植，而且采用三线制与单片机相连，减少了外部的硬件电路，具有低成本和易使用的特点同时它具有微型化、低功耗、高性能、抗干拢能力强、易配微处理器等优点，特别适合于构成多点温度测控系统，可直接将温度转化成串行数字信号供微机处理，而且每片DS1820都有唯一的产品号并可存入其ROM中，以便在构成大型温度测控系统时在单线上挂接任意多个DS1820芯片。

Vertical Sensitivity 2 mV/div Maximum Vertical Sensitivity 10 V/div Number of Bits 8 bits Main time base - lowest 2.5 ns/div Main time base - highest 5 s/div Timebase accuracy 0.01 % Trigger Source External,Internal Display modes Dot,Vector

使用标准RS-232接口连接至计算机可长时间记录读值，数据笔数几乎可达无限多笔 7。 Flicker量测功能，每秒可读取256个读值，可将各个频率点的Flicker值量测并显示出来

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。