Stature estimation is widely used for individual identification in forensic field.Previous studies have proposed several regression equations derived from a single population for this purpose.However,this may not be s...Stature estimation is widely used for individual identification in forensic field.Previous studies have proposed several regression equations derived from a single population for this purpose.However,this may not be suitable for other populations because of different hereditary and environmental conditions.In this study,stature estimation equations for southern China Han population have been provided.The study was conducted on a sample population of 121 men and women aged 18–25 years.A total of 19 parameters,including stature,head,torso,and parts of upper limbs and lower limbs,were measured according to standard anthropometric procedures.Herein,the anterior superior spine–malleolus medialis line showed the highest correlation coefficient(r=0.817)and was the most reliable predictor(R^(2)=0.667)in men,while the best predictor for women was total leg length(R^(2)=0.746)with the highest correlation coefficient(r=0.863).The regression analysis results via multiple predictors showed a high accuracy in stature estimation.Moreover,the analysis of multiple regression predictors showed that the dimensions of lower limbs were more reliable for stature estimation compared to head,torso,and upper limb measurements.This study provided equations of stature estimation for southern China Han population which can be useful in cases of dismembered body.展开更多
In this paper, a new analytical-engineering method of closed form solution about stress intensity factors for three dimensional finite bodies with eccentric cracks is derived by means of energy release rate method. Th...In this paper, a new analytical-engineering method of closed form solution about stress intensity factors for three dimensional finite bodies with eccentric cracks is derived by means of energy release rate method. The results of stress intensity factors can be obtained. The results provided ir this method are in nice agreement with those of the famous alternating method by which only special cases can be solved.展开更多
Continuous live weight and carcass traits estimation are important for the pig production and breeding industry.It is widely known that top-view images of a pig’s body(excluding its head and neck)reveal surface dimen...Continuous live weight and carcass traits estimation are important for the pig production and breeding industry.It is widely known that top-view images of a pig’s body(excluding its head and neck)reveal surface dimension parameters,which are correlated with live weight and carcass traits.However,because a pig is not constrained when an image is captured,the body does not always have a straight posture.This creates a big challenge when extracting the body surface dimension parameters,and consequently the live weight and carcass traits estimation has a high level of uncertainty.The primary goal of this study is to propose an algorithm to automatically extract pig body surface dimension parameters,with a better accuracy,from top-view pig images.Firstly,the backbone line of a pig was extracted.Secondly,lengths of line segments perpendicular to the backbone line were calculated,and then feature points on the pig’s contour line were extracted based on the lengths variation of the perpendicular line segments.Thirdly,the head and neck of the pig were removed from the pig’s contour by an ellipse.Finally,four length and one area parameters were calculated.The proposed algorithm was implemented in Matlab®(R2012b)and applied to 126 depth images of pigs.Taking the results of the manual labeling tool as the gold standard,the length and area parameters could be obtained by the proposed algorithm with an accuracy of 97.71%(SE=1.64%)and 97.06%(SE=1.82%),respectively.These parameters can be used to improve pig live weight and carcass traits estimation accuracy in the future work.展开更多
An experimental technique for determining the anti plane stress intensity factor K Ⅲ of a three dimensional crack, which is very difficult to obtain by other experimental methods, has been presented by using...An experimental technique for determining the anti plane stress intensity factor K Ⅲ of a three dimensional crack, which is very difficult to obtain by other experimental methods, has been presented by using reflected caustics in combination with the stress freezing and stress releasing technique. The results of this experimental method coincided favorably with the theoretical analysis results of Tweed and Rooke.展开更多
Simulating incident group wave with narrow spectrum by nonlinear slowly modulated Stoking wave train and using Multiple Scales Method.problem of the second-order low frequency diffraction of group waves on a two-di me...Simulating incident group wave with narrow spectrum by nonlinear slowly modulated Stoking wave train and using Multiple Scales Method.problem of the second-order low frequency diffraction of group waves on a two-di mensionai floating body has been studied.The first-order and second-order low frequency diffraction potentials are derived,which lead to the second-order and third-order low frequency forces respectively.It is shown thai the sec- ond-order low frequency force generated by first-order low frequency diffraction potentials is verticcal to undis- turbed free surface,and is directly proportional to square of envelope amplitude of incident wave and to waterline width of floating body.The horizontal low frequency forces are caused by the second-order low frequency diffrac- tion potential.To determine it only two linear boundary value problems are necessary to be solved.展开更多
基金This study was supported by the National Natural Science Foundation of China(Grant No.81871526)the National Students’Innovative and Entrepreneurship Training Program(No.20181212112X).
文摘Stature estimation is widely used for individual identification in forensic field.Previous studies have proposed several regression equations derived from a single population for this purpose.However,this may not be suitable for other populations because of different hereditary and environmental conditions.In this study,stature estimation equations for southern China Han population have been provided.The study was conducted on a sample population of 121 men and women aged 18–25 years.A total of 19 parameters,including stature,head,torso,and parts of upper limbs and lower limbs,were measured according to standard anthropometric procedures.Herein,the anterior superior spine–malleolus medialis line showed the highest correlation coefficient(r=0.817)and was the most reliable predictor(R^(2)=0.667)in men,while the best predictor for women was total leg length(R^(2)=0.746)with the highest correlation coefficient(r=0.863).The regression analysis results via multiple predictors showed a high accuracy in stature estimation.Moreover,the analysis of multiple regression predictors showed that the dimensions of lower limbs were more reliable for stature estimation compared to head,torso,and upper limb measurements.This study provided equations of stature estimation for southern China Han population which can be useful in cases of dismembered body.
文摘In this paper, a new analytical-engineering method of closed form solution about stress intensity factors for three dimensional finite bodies with eccentric cracks is derived by means of energy release rate method. The results of stress intensity factors can be obtained. The results provided ir this method are in nice agreement with those of the famous alternating method by which only special cases can be solved.
基金This work was enclosed in the Flemish IWT funded project“Sustainable precision feeding”(Grant No.AIC-221.42.D.02),in collaboration with Agrifirm Innovation Center and Fancom.This work was also supported by the Fundamental Research Funds for the Central Universities of China(Grant No.KYZ201561)the Joint Innovation Fund of Production,Learning,and Research-Prospective Joint Research Project,Jiangsu,China(Grant No.BY2015071-06)the fund of China Scholarship Council(Grant No.201506855017).
文摘Continuous live weight and carcass traits estimation are important for the pig production and breeding industry.It is widely known that top-view images of a pig’s body(excluding its head and neck)reveal surface dimension parameters,which are correlated with live weight and carcass traits.However,because a pig is not constrained when an image is captured,the body does not always have a straight posture.This creates a big challenge when extracting the body surface dimension parameters,and consequently the live weight and carcass traits estimation has a high level of uncertainty.The primary goal of this study is to propose an algorithm to automatically extract pig body surface dimension parameters,with a better accuracy,from top-view pig images.Firstly,the backbone line of a pig was extracted.Secondly,lengths of line segments perpendicular to the backbone line were calculated,and then feature points on the pig’s contour line were extracted based on the lengths variation of the perpendicular line segments.Thirdly,the head and neck of the pig were removed from the pig’s contour by an ellipse.Finally,four length and one area parameters were calculated.The proposed algorithm was implemented in Matlab®(R2012b)and applied to 126 depth images of pigs.Taking the results of the manual labeling tool as the gold standard,the length and area parameters could be obtained by the proposed algorithm with an accuracy of 97.71%(SE=1.64%)and 97.06%(SE=1.82%),respectively.These parameters can be used to improve pig live weight and carcass traits estimation accuracy in the future work.
文摘An experimental technique for determining the anti plane stress intensity factor K Ⅲ of a three dimensional crack, which is very difficult to obtain by other experimental methods, has been presented by using reflected caustics in combination with the stress freezing and stress releasing technique. The results of this experimental method coincided favorably with the theoretical analysis results of Tweed and Rooke.
基金This work is supported by Chinese National Natural Science Foundation
文摘Simulating incident group wave with narrow spectrum by nonlinear slowly modulated Stoking wave train and using Multiple Scales Method.problem of the second-order low frequency diffraction of group waves on a two-di mensionai floating body has been studied.The first-order and second-order low frequency diffraction potentials are derived,which lead to the second-order and third-order low frequency forces respectively.It is shown thai the sec- ond-order low frequency force generated by first-order low frequency diffraction potentials is verticcal to undis- turbed free surface,and is directly proportional to square of envelope amplitude of incident wave and to waterline width of floating body.The horizontal low frequency forces are caused by the second-order low frequency diffrac- tion potential.To determine it only two linear boundary value problems are necessary to be solved.