诊断中的异化与异化的诊断——1例误诊病例的反思

随着诊断技术的日新月异,极大地拓展了临床医师对疾病的认识,但同时也限制了医师的临床思维,形成诊断过程中的"异化"现象。本文以1例患者的误诊过程为例,说明诊断中的异化现象及其对诊断的影响。为减少误诊,医师必须回到"人"的位置,避免成为医疗技术的"奴隶"。     

Prediction of weightlifter’s motor behavior to evaluate snatch weightlifting techniques based on a new method of investigation of consumed energy

Using proper technique in different sports is an inevitable factor. In this study, available techniques for snatch weightlifting are mathematically evaluated. The optimal motion trajectory is a technique used by weightlifters, which could be determined based on minimizing specific object functions. Object functions based on total kinetic energy, total torque and total power and some new multiobjective functions are minimized using genetic algorithm and the minimax principle. Some important motion characteristics of 13 professional weightlifters were extracted and used to validate the mathematical results. The double knee bending (DKB) technique was studied as a benchmark test. Some important movement features of the technique were shown by the mathematical analysis when applying an object function, that minimized joint torques and powers of different muscles independently. An object function based on joint forces did not show these features.