ANALYSIS OF VIBRATION CHARACTERISTICS OF SHEARER CUTTING UNIT

ANALYSIS OF VIBRATION CHARACTERISTICS OF SHEARER CUTTING UNIT

The shearer is under complex impact when it works.and it makes the shearer cutting unit vibrate,which increase Motor Hood the burden of the spiral drum and rocker arm shell.Besides,it would bring bad effects to the shear performance of the shearer.In order to study its study the working stability,the vibration mathematical equations in vertical dir

read more


Mitochondrial lineage M1 traces an early human backflow to Africa

Abstract Background The out of Africa hypothesis has gained generalized consensus.However, many specific questions remain unsettled.To know whether the two M and N macrohaplogroups that colonized Eurasia were already present in Africa before the exit is puzzling.It has been proposed that the east African clade M1 supports a single origin of haplogr

read more


Generation of hiPSC lines from four glutaric aciduria type I (GA1) patients carrying pathogenic biallelic variants in GCDH

GCDH encodes for the enzyme catalyzing the sixth step of the lysine degradation pathway.Autosomal recessive variants in GCDH are associated with glutaric aciduria master-cock type I (GA1), of which a wide genotypic spectrum of pathogenic variants have been described.In this study, hiPSC lines derived from four GA1 patients with different genotypes

read more