定时

In alternating current the motion of the charges is periodically reversed; in direct current it is not.

在交流电中，电荷流动会定时的反向，而在直流电中则不会。

First it produces the pulse signal by the multivibratorwhich is consisted of 555 timer and send in the detecting coil to form the alternating magnetic field, then it asopts UGN3503 linear half-effect as prode to the magnetic field change into the voltage signal change,after enlargement electric circuit and peak value examination electric circuit,the signal be treated to send into ADC0809 modulus converter change moduluses, then the digital signal after the modulus converter is changed is sent into AT89C51one-chip computers afterwards, after the digital filter, AT89C51one-chip computers afterwards compares the data to the reference voltage and judges whether to have detected the metal and alarm.

这个系统是以AT89C51单片机为核心，首先由555定时器构成多谐振荡器产生脉冲信号送入探测线圈以形成交变磁场，然后经过线性霍尔器件UGN3503将磁场变化转换为电压信号的变化，经过放大电路和峰值检测电路，经数模转换之后输入到单片机中，由单片机对数据进行软件滤波之后，与基准值比较之后，判断是否存在金属和报警显示。

After some amicability and spot date performances in the last two years, the two announced that they are bringing their reunion to a nationwide stage.

在过去两年的一些亲密和定时表演中，Cham和PW宣布他们将会在一个全国性质的演出中复合。

High frequency and low noise of power device: Local and remote control can be realized and is simple in operation, which can be added the control of time, ampere-hour and temperature as well as PLC, field bus and computer interface.

功率元件工作频率高，不产生噪音。可实现本地和远程控制，操作简便，可增设定时、安时、温度等控制， PLC 或现场总线及计算机接口。

The instruments used ATmega16L onboard A / D converter channels to achieve the cold wind pressure, the hot blast pressure, the furnace top pressure and cold wind current capacity four way analog acquisition;used PWM waveform produced by ATmega16L internal timing / Counter to achieve the entire differential pressure ,the cold wind flow and the permeability index three-way analog output for recording instruments; realized the cold wind pressure, the hot blast pressure, the furnace top pressure, the cold wind current capacity and the entire differential pressure five group parameter tour demonstration and the fixed-point demonstration by key-elect key's coordination during demonstration blast furnace permeable index; produced acousto-optics alarm when the permeable index across the upper and lower limits;used RS-485 realizing the communication with the superior computer.

仪表利用ATmega16L自带的A/D转换通道实现对冷风压力、热风压力、炉顶压力及冷风流量四路模拟信号的采集；通过ATmega16L内部的定时/计数器产生的PWM波形来实现对全压差、冷风流量及透气性指数三路模拟量输出供记录仪表使用；通过键选键的配合在显示高炉透气性指数的同时实现冷风压力、热风压力、炉顶压力、冷风流量及全压差五路参数的巡回显示与定点显示；当高炉透气性指数越上、下限时，仪表产生声光报警信号；仪表采用RS-485与上位机实现通信。

When one's true purpose is anchored, one becomes their living truth.

当你的真正目的被锚定时，它就变成你活着的真相。

In this paper, based on the specific CNG engine parameters and characteristics, the influence of the injection timing, ignition energy and lean combustion for the engine is tested, in order to explore the control rules of fuel injection, ignition energy and lean combustion and then draw the following conclusions: small injection advance angle of electronic controlled injection CNG engine is optimum

文章根据天然气发动机的具体参数和特性，探索电控喷射CNG发动机在燃料喷射、点火能量和稀燃等方面的控制规律，确定最优的控制参数，开展了喷射定时、点火能量及稀薄燃料等参数对发动机性能影响的试验研究工作，并根据试验结果分析，得出了以下结论：电控喷射WT615CNG发动机燃料喷射提前角要小些为宜

So when it comes to an ethical decision, it's important to examine it from all angles.

所以，当作出一个正确的决定时，从方方面面审视是很重要的。

The angriest one is the allegation of having no radio therapy treatment. Ah Mui, in fact, has received the treatment on schedule. She was also out. such as she was out yesterday at her car without curtain, but no one discovered. The reporters claimed Ah Mui had not undergone the treatment when they were unable to take the photographs. Hope everyone let Ah Mui get her treatment peacefully.

阿梅最嬲系话佢冇接受化疗，其实阿梅有定时接受化疗，亦有出街，好似昨日都有坐自己架车，冇拉窗帘、冇遮冇挡咁出入，但都冇人发现，记者影唔到就话阿梅冇接受化疗，希望大家畀阿梅安静咁治疗啦！

Sea area measurement usually uses GPS timely processing the position data for the boundary of sea area, and then calculates the sea area of anomalistic area.

海域面积是一个封闭且不规则的曲面区域，对海域面积测算通常是先使用GPS定时测定待测海域边界位置点的地理坐标，再求取其围成的不规则曲面区域的面积。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐