The model can be made into difference equation of the temperature field that can be used to simulate calculation ; then we can get the set of edge point , and we can have the function of the fire line , and we can also have the burned area , the length of fire line and the space of fire area ; it also come to the conclusion that the main factor of forest fire is convection heat transfer 经差分处理，得到进行模拟计算的一组温度场计算方程；由边界点条件，求出边界点的集合后，拟合得出火线函数，积分后可得到时刻火场的过火总面积、火线长度和火场形状，同时进一步证实了对流传热方式是影响林火蔓延的主要因素。
It is composed of magnetic pulse sensor and control components , and is a built - in part inside distributor . it detects engine cranking position signal and cylinder signal via sensor , followed by treatment by control unit , thus controlling the onoff of the current of control ignition coil to achieve the purpose of ignition . it has a function of auto closing regulation 该型产品是为微车无触点点火系统而研发的，它由磁脉冲传感器和控制组件构成，内置于分电器内，通过传感器检测发动机曲轴位置信号、汽缸信号，然后经控制组件处理，控制点火线圈中电流的通断，从而达到点火目的，具有闭合角自动调整等功能。
For example , their exhaustive spreadsheets reveal that when surgeons are faced with wounded men off the battlefield , the death count is reduced if , instead of continuing the necessary emergency treatment , they ship the anaesthetised soldiers off to other , perhaps better - equipped facilities , their wounds often still open and packed with gauze 例如，详尽的电子数据表明，面对从火线上下来的伤患，军医们不去开展必要的急救，而是将伤口尚未缝合，过着纱布的伤员麻醉后运往其它设备更好的组织，以便减少死亡数。
I am less affected by their heroism who stood up for half an hour in the front line at buena vista ， than by the steady and cheerful valor of the men who inhabit the snowplow for their winter quarters ； who have not merely the three - o ' - clock - in - the - morning courage ， which bonaparte thought was the rarest ， but whose courage does not go to rest so early ， who go to sleep only when the storm sleeps or the sinews of their iron steed are frozen 在布埃纳维斯塔的火线上，能站立半小时的英雄，我倒不觉得怎样，我还是比较佩服那些在铲雪机里过冬，坚定而又愉快的人们；他们不但具有连拿破仑也认为最难得的早上三点钟的作战勇气，他们不但到这样的时刻了都还不休息，而且还要在暴风雪睡着了之后他们才去睡，要在他们的铁马的筋骨都冻僵了之后他们才躺下。
