针对中国围网渔船作业机械化程度低、起放网速度慢等问题,围绕加快围网网具整理速度,提高整体作业的效率,开发了1.5T围网理网机。利用CREO三维建模软件建立理网机实体模型,并将建好模型导入ANSYS Work Bench中进行有限元受力分析,对理...针对中国围网渔船作业机械化程度低、起放网速度慢等问题,围绕加快围网网具整理速度,提高整体作业的效率,开发了1.5T围网理网机。利用CREO三维建模软件建立理网机实体模型,并将建好模型导入ANSYS Work Bench中进行有限元受力分析,对理网机作业工况位置进行有限元分析计算,对最大应力结构部件进行优化分析设计,最终得到结构合理、强度满足安全系数的理网机部件参数。展开更多
目的分析1例Aw37B亚型患者及其家系的血清学和分子特征,探讨其分子生物学机制及在疑难血型鉴定和临床输血中的意义。方法应用序列特异性引物聚合酶链反应(PCR-sequence specific primer,PCR-SSP)进行ABO基因分型,并对ABO基因的全部外显...目的分析1例Aw37B亚型患者及其家系的血清学和分子特征,探讨其分子生物学机制及在疑难血型鉴定和临床输血中的意义。方法应用序列特异性引物聚合酶链反应(PCR-sequence specific primer,PCR-SSP)进行ABO基因分型,并对ABO基因的全部外显子进行扩增产物直接测序。进一步对第6、7外显子进行克隆测序。结果先证者红细胞为A弱B表型,其血清样本中含有弱反应性抗-A抗体,依据血清学特征可定义为AwB血型。血型基因分型检测到A和B等位基因。基因克隆测序显示在A等位基因第7外显子存在ABO*AW.37的特征性变异c.940A>G,导致多肽链第314位的赖氨酸(Lys)被谷氨酸(Glu)替换。同时测序发现先证者的女儿遗传了ABO*AW.37等位基因。结论ABO血型基因第7外显子c.940A>G变异导致α-1,3-N-乙酰半乳糖基转移酶活性降低,产生Aw37表型。展开更多
The method of collaborative work between steel plate anti-wind bearing(AWB) and rubber isolation bearing is proposed to study the vibration reduction effect of isolation structure under stronger wind load,and the func...The method of collaborative work between steel plate anti-wind bearing(AWB) and rubber isolation bearing is proposed to study the vibration reduction effect of isolation structure under stronger wind load,and the function mechanism is explained.Based on a practical project,three kinds of schemes with different isolation layers are put forward,the finite element software ETABS is used for time history analysis,and comparison is made on the seismic response of different isolated structure and aseismic structure.Comparison result shows that the isolation layer with rubber bearing and AWB can work reasonably,but further optimization on the designed parameters is needed.Moreover,the design value of horizontal bearing capacity of lead rubber bearing(LRB) is appropriate to be close to the seismic isolation layer under wind load excitation.Finally,numerical simulation and comparative analysis of shear test of the AWB are conducted.With a very small yield displacement and yield strength over 80% of the set of horizontal bearing capacity,the AWB is validated to satisfy the working conditions which provide the horizontal bearing capacity under normal operating conditions and designed earthquake.The AWB yields and malfunctions,when the maximum displacement is less than the displacement of the isolation layer.展开更多
Domestication of livestock involves drastic phenotypic changes driven by strong artificial selection,such as tame behavior and coat color.These abundant phenotypic variations established during animal domestication ha...Domestication of livestock involves drastic phenotypic changes driven by strong artificial selection,such as tame behavior and coat color.These abundant phenotypic variations established during animal domestication have provided valuable resources to study the evolutionary mechanisms underlying domestication.展开更多
文摘针对中国围网渔船作业机械化程度低、起放网速度慢等问题,围绕加快围网网具整理速度,提高整体作业的效率,开发了1.5T围网理网机。利用CREO三维建模软件建立理网机实体模型,并将建好模型导入ANSYS Work Bench中进行有限元受力分析,对理网机作业工况位置进行有限元分析计算,对最大应力结构部件进行优化分析设计,最终得到结构合理、强度满足安全系数的理网机部件参数。
文摘目的分析1例Aw37B亚型患者及其家系的血清学和分子特征,探讨其分子生物学机制及在疑难血型鉴定和临床输血中的意义。方法应用序列特异性引物聚合酶链反应(PCR-sequence specific primer,PCR-SSP)进行ABO基因分型,并对ABO基因的全部外显子进行扩增产物直接测序。进一步对第6、7外显子进行克隆测序。结果先证者红细胞为A弱B表型,其血清样本中含有弱反应性抗-A抗体,依据血清学特征可定义为AwB血型。血型基因分型检测到A和B等位基因。基因克隆测序显示在A等位基因第7外显子存在ABO*AW.37的特征性变异c.940A>G,导致多肽链第314位的赖氨酸(Lys)被谷氨酸(Glu)替换。同时测序发现先证者的女儿遗传了ABO*AW.37等位基因。结论ABO血型基因第7外显子c.940A>G变异导致α-1,3-N-乙酰半乳糖基转移酶活性降低,产生Aw37表型。
基金the National Natural Science Foundation of China(No.51578160)
文摘The method of collaborative work between steel plate anti-wind bearing(AWB) and rubber isolation bearing is proposed to study the vibration reduction effect of isolation structure under stronger wind load,and the function mechanism is explained.Based on a practical project,three kinds of schemes with different isolation layers are put forward,the finite element software ETABS is used for time history analysis,and comparison is made on the seismic response of different isolated structure and aseismic structure.Comparison result shows that the isolation layer with rubber bearing and AWB can work reasonably,but further optimization on the designed parameters is needed.Moreover,the design value of horizontal bearing capacity of lead rubber bearing(LRB) is appropriate to be close to the seismic isolation layer under wind load excitation.Finally,numerical simulation and comparative analysis of shear test of the AWB are conducted.With a very small yield displacement and yield strength over 80% of the set of horizontal bearing capacity,the AWB is validated to satisfy the working conditions which provide the horizontal bearing capacity under normal operating conditions and designed earthquake.The AWB yields and malfunctions,when the maximum displacement is less than the displacement of the isolation layer.
基金supported by the grants from the Chinese Academy of Sciences (XDA08010304)the National Natural Science Foundation of China (31472000)+1 种基金the Ministry of Agriculture of China (2016ZX08009003-006)the Animal Branch of the Germplasm Bank of Wild Species, Chinese Academy of Sciences (the Large Research Infrastructure Funding)
文摘Domestication of livestock involves drastic phenotypic changes driven by strong artificial selection,such as tame behavior and coat color.These abundant phenotypic variations established during animal domestication have provided valuable resources to study the evolutionary mechanisms underlying domestication.
