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Àî·lulu: ½ð±Ò+20, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2014-03-30 11:37:00
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ÔõôÓÖÊÇÄ㣿ÒÔÏÂÊǸß˹ÊÖ²áÀïµÄÄÚÈÝ£º The 1996 pure functional of Perdew, Burke and Ernzerhof [Perdew96a, Perdew97], as made into a hybrid by Adamo [Adamo99a]. The keyword is PBE1PBE. This functional uses 25% exchange and 75% correlation weighting, and is known in the literature as PBE0. Èç¹ûÄã¸ÄÁË£¬Äǿ϶¨²»ÄܽÐPBE0ÁË¡£ ÏÂÃæÊÇÈçºÎ×Ô¶¨ÒåÁË£¬Í¬ÑùÀ´×Ô¸ß˹Êֲ᣺ User-Defined Models. Gaussian 09 can use any model of the general form: P2EXHF + P1(P4EXSlater + P3¦¤Exnon-local) + P6EClocal + P5¦¤ECnon-local The only available local exchange method is Slater (S), which should be used when only local exchange is desired. Any combinable non-local exchange functional and combinable correlation functional may be used (as listed previously). The values of the six parameters are specified with various non-standard options to the program: IOp(3/76=mmmmmnnnnn) sets P1 to mmmmm/10000 and P2 to nnnnn/10000. P1 is usually set to either 1.0 or 0.0, depending on whether an exchange functional is desired or not, and any scaling is accomplished using P3 and P4. IOp(3/77=mmmmmnnnnn) sets P3 to mmmmm/10000 and P4 to nnnnn/10000. IOp(3/78=mmmmmnnnnn) sets P5 to mmmmm/10000 and P6 to nnnnn/10000. For example, IOp(3/76=1000005000) sets P1 to 1.0 and P2 to 0.5. Note that all values must be expressed using five digits, adding any necessary leading zeros. Here is a route section specifying the functional corresponding to the B3LYP keyword: #P BLYP IOp(3/76=1000002000) IOp(3/77=0720008000) IOp(3/78=0810010000) The output file displays the values that are in use: IExCor= 402 DFT=T Ex=B+HF Corr=LYP ExCW=0 ScaHFX= 0.200000 ScaDFX= 0.800000 0.720000 1.000000 0.810000 where the value of ScaHFX is P2, and the sequence of values given for ScaDFX are P4, P3, P6 and P5. ÉÏÃæ¸øµÄÊÇÈçºÎ×Ô¶¨ÒåB3LYPµÄ·½·¨£¬PBE0×ÔȻҪ´Ó´¿·ºº¯µÄÐÎʽPBEPBE³ö·¢×Ô¶¨Ò塣ʣϵÄ×Ô¼ººÃºÃÁìÎò£¬²»ÒªÔÙÎÊÁË¡£²»ÄÜÈñðÈËÊÖ°ÑÊÖÒ»²½Ò»²½½ÌÄ㣬Ӧ¸Ãѧ»á¶ÀÁ¢Ë¼¿¼¡£¿ÉÄÜÎÒ˵µÄ²»Ì«ºÃÌý£¬µ«Ï£ÍûÄãÄÜÀí½â¡£ |
2Â¥2014-03-29 13:57:23
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3Â¥2014-03-30 11:36:56













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