係数
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(係(xì )数(shù ),系(xì )数(shù ))
讨(tǎo )论(lùn )数(shù )学(xué )问(wèn )题(tí )时(shí ),在(zài )与(yǔ )特(tè )定(dìng )的(de )变(biàn )量(liàng )(或(huò )未(wèi )知(zhī )函(hán )数(shù ))及(jí )其(qí )导(dǎo )数(shù )有(yǒu )关(guān )的(de )表(biǎo )达(dá )式(shì )或(huò )方(fāng )程(chéng )中(zhōng ),与(yǔ )未(wèi )知(zhī )数(shù )相(xiàng )乘(chéng )的(de )已(yǐ )知(zhī )函(hán )数(shù )或(huò )常(cháng )数(shù )称(chēng )为(wéi )係(xì )数(shù )。在(zài )物(wù )理(lǐ )学(xué )、工(gōng )程(chéng )技(jì )术(shù )及(jí )其(qí )他(tā )方(fāng )面(miàn ),也(yě )广(guǎng )泛(fàn )使(shǐ )用(yòng )係(xì )数(shù )这(zhè )一(yī )名(míng )词(cí )。如(rú )一(yī )个(gè )量(liàng )的(de )部(bù )分(fèn )值(zhí )与(yǔ )总(zǒng )值(zhí )之(zhī )比(bǐ ),或(huò )一(yī )个(gè )量(liàng )的(de )变(biàn )化(huà )与(yǔ )另(lìng )一(yī )些(xiē )量(liàng )的(de )变(biàn )化(huà )之(zhī )间(jiān )关(guān )係(xì )式(shì )中(zhōng )的(de )某(mǒu )些(xiē )有(yǒu )关(guān )的(de )数(shù ),都(dōu )称(chēng )係(xì )数(shù )。这(zhè )时(shí )在(zài )係(xì )数(shù )之(zhī )前(qián )常(cháng )冠(guàn )以(yǐ )有(yǒu )关(guān )现(xiàn )象(xiàng )或(huò )事(shì )物(wù )的(de )专(zhuān )名(míng ),如(rú )“膨(péng )胀(zhàng )係(xì )数(shù )”、“石(shí )炭(tàn )酸(suān )係(xì )数(shù )”等(děng )。
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