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    绶氬湀鍙�娌块惖妫嶈桓鍚戣嚜鐢辩Щ鍕�(d貌ng)銆傚湪绶氬湀鐨勮�岀▼鑼冨湇鍏�(n猫i)锛岀�侀惖绲︿簣瀹冨ぇ鑷村潎鍕荤殑纾佸��(ch菐ng)B銆傜暥(d膩ng)绶氬湀涓�閫氬叆鐩存祦闆绘簮I鏅�(sh铆)锛屽皫(d菐o)楂旂窔鍦堣檿浜庣�佸��(ch菐ng)涓�鐨勯儴鍒嗗氨鏈�(hu矛)鍙楀埌闆荤�佸姏鐨勪綔鐢�銆傞�欏��(g猫)闆荤�佸姏鐨勬柟鍚戝彲鐢遍浕纾佹劅鎳�(y墨ng)宸︽墜瀹氬墖渚�(l谩i)纰哄畾銆傚乏鎺屽績姝ｅ皪(du矛)钁桞鏂瑰悜锛屽洓鎸囧皷闋嗚憲闆绘祦鏂瑰悜锛屽墖濮嗘寚鎵�鎸囩殑鏂瑰悜鍗崇偤绶氬湀鎵�鍙楅浕纾佸姏浣滅敤鐨勬柟鍚戙�傚洜姝�锛屽彲浠ュ緢瀹规槗鍒ゆ柗鍑�锛屽彧瑕佹敼璁婄洿娴侀浕娴両鐨勬柟鍚�锛屽氨鍙�鏀硅畩绶氬湀鍙楀姏鐨勬柟鍚�锛岄��(j矛n)鑰屾敼璁婄窔鍦堥亱(y霉n)鍕�(d貌ng)鏂瑰悜銆�

    鏍规摎(j霉)瀹夊煿瀹氬墖锛岄浕纾佸姏鐨勫ぇ灏忓彲鐢变笅寮忕畻鍑猴細

    F =BIL

    B鐐虹�佹劅鎳�(y墨ng)寮�(qi谩ng)搴�T锛堢壒鏂�鎷夛��锛孖鐐哄皫(d菐o)楂斾腑鐨勯浕娴佸挤(qi谩ng)搴�A锛堝畨鍩癸級锛孡鐐鸿檿浜庣�佸��(ch菐ng)涓�鐨勫��(d菐o)楂旈暦(zh菐ng)搴�m锛堢背锛�

    鐣�(d膩ng)灏�(d菐o)楂旂偤澶氬対绶氬湀鏅�(sh铆)锛屽皪(du矛)浜庣窔鍦堟暣楂旓細I'=nI锛� n鐐虹窔鍦堝対鏁�(sh霉)锛屽墖锛�

    F=BI'L=B锛坣I锛塋

    鍙�瑕佺窔鍦堝彈鍒扮殑闆荤�佸姏澶т簬绶氬湀鏀�鏋朵笂瀛樺湪鐨勯潨鎽╂摝闃诲姏Fs锛屽氨鍙�浣跨窔鍦堢��(ch菐n)鐢熺洿绶氶亱(y霉n)鍕�(d貌ng)銆傞�欏氨鏄�鐩寸窔鐩存祦闆诲��(d貌ng)姗�(j墨)宸ヤ綔鐨勫熀鏈�鍘熺��銆�