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106-ɫɭɪɟɬ

ȼ ɧԛɤɬɟɫɿ Ⱥ ɧԛɤɬɟɫɿɧɟɧ dx ԕɚɲɵԕɬɵԕɬɚ ɨɪɧɚɥɚɫԕɚɧɞɵԕɬɚɧ:

u1 M x dx, y, z u wu dx .
wx

Ⱥȼ = dx ԕɚɛɵɪԑɚɫɵɧɵԙ ɬɨɥɵԕ ԝɡɚɪɭɵ u1 u wu dx .
wx
Ɉɥ ԕɚɛɵɪԑɚɧɵԙ ɫɚɥɵɫɬɵɪɦɚɥɵ ԝɡɚɪɭɵ, ɹԑɧɢ ɞɟɮɨɪɦɚɰɢɹɫɵ:

Hx u1 u wu dx ; dx wu .
dx wx wx

Ɉɫɵɥɚɣɲɚ ԕɚɥԑɚɧ ɞɟɮɨɪɦɚɰɢɹɥɚɪɞɵ ɬɚɛɚɦɵɡ: H y wv .
wy

ȿɧɞɿ ɛԝɪɵɲɬɵԕ ɞɟɮɨɪɦɚɰɢɹɥɚɪɞɵ ɬɚɛɚɣɵԕ. Ɉɥ ԛɲɿɧ 106-ɫɭɪɟɬɤɟ ɤԧԙɿɥ
ɚɭɞɚɪɚɣɵԕ.
Ɉɫɵ ɫɭɪɟɬɬɟ ɤԧɪɫɟɬɿɥɝɟɧɞɟɣ, ɞɟɮɨɪɦɚɰɢɹԑɚ ɞɟɣɿɧ ȼȺɋ ɬɿɤɛԝɪɵɲɬɵ

D E ɛԝɪɵɲɵɧɚ ԧɡɝɟɪɟɞɿ. Ȼԝɥ xoz ɠɚɡɵԕɬɵԑɵɧɞɚԑɵ ɫɚɥɵɫɬɵɪɦɚɥɵ ɵԑɵɫɭ

ɛԝɪɵɲɵ, ɨɧɵ J zx ɞɟɩ ɛɟɥɝɿɥɟɣɦɿɡ:

J zx D E .

ȼIIȺȱȼȱ ɬɿɤɛԝɪɵɲɬɵ ԛɲɛԝɪɵɲɵɧɚɧ:

ww dx ww
wx
D | tqD BII BI wx .
AI BII wu wu
dx wx dx 1 wx

Ȼԧɥɿɦɞɟɝɿ wu ɲɚɦɚɫɵɧ ɟɫɤɟɪɦɟɫɟɤ, D ww . Ɉɫɵ ɫɟɤɿɥɞɿ E wu .
ɋɨɧɵɦɟɧ, wx wx wz

J zx wu ww .
wz wx
Ȼɚɫԕɚ ɠɚɡɵԕɬɵԕɬɚɪɞɚԑɵ ɛԝɪɵɲɬɵԕ ɞɟɮɨɪɦɚɰɢɹɥɚɪɞɵ ɨɫɵɥɚɣɲɚ ɬɚɛɚɦɵɡ.

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