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简介：数字方法在分析有结构的强风波浪繁殖和相互作用是流行的。因为在不同格子之间的强风波浪和精力传播的极其短的持续时间，然而，数字结果对有限元素网孔尺寸敏感。尽管二种情形之间的差别是很小的，以前的数字模拟证明对一种强风情形可接受的一种网孔尺寸可能不为另一个案例是合适的，显示简单数字网孔尺寸集中测试可能不是足够的保证精确数字结果。因此，粗糙的网孔和好网孔在不同强风情形被使用在有结构的强风波浪繁殖和相互作用的数字结果上调查网孔尺寸效果。在TM5-1300与地测试结果和设计图表基于数字结果和他们的比较，一个数字修正方法被建议在模仿的结果上改正网孔尺寸的影响。在结构上改进强风波浪繁殖和强风负担的数字结果的精确性能容易被用来。

简介：Background:Athletes,coaches,sportpsychologypractitioners,andresearcherssuggestthatmentaltoughnessrepresentsanimportantconstructthatisassociatedwithathleticperformance.Unfortunately,theabsenceofreal-worldperformanceasadependentvariablehaslimitedourabilitytosubstantiatethisclaim.Theconcernofalackofecologicallyvalidmeasuresofsportsperformancemightbeaddressedbyexaminingtherelationshipbetweenmentaltoughnessandsportsperformanceusingastandardizedmeasureofpersonalbest(PB)triathlontimeandavalidatedunidimensionalmeasureofmentaltoughness.Methods:Threehundredandsixteentriathletescompletedthe8-itemmentaltoughnessindex(MTI),reportedtheirage,andprovidedaPBOlympicdistancetriathlontimeandthetotalnumberoftriathlonstheyhadcompletedtodate.Giventhatmalesaretypicallyquickerthanfemales,astandardizedtimewascalculatedbydividingthePBbythecurrentOlympicrecordforgender;wealsohypothesizedthatmoreexperiencedtriathleteswouldreportquickerPBtimesbecauseofgreaterfrequencyanddurationoftraining.Oncewehadcontrolledforgenderandexperience,wepredictedthatmentaltoughnesswouldbenegativelyassociatedwithtriathlontimeandthesizeoftherelationshipwouldbeofamoderatemagnitude.Results:Resultsrevealedsmall-tomoderate-sizednegativerelationshipsbetweenbothcompletednumberoftriathlonsandmentaltoughnesswithstandardizedPBtime.Conclusion:ThehierarchicalregressionanalysisshowedthatmentaltoughnessprovidedauniquecontributiontothevariabilityinstandardizedOlympictriathlonPBaftercontrollingforthetotalnumberoftriathlonscompleted.

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