Heilongjiang Province is an important marketable grain depot in China. Since the reform and opening up, Heilongjiang Province production capacity of foodstuff is increasingly growing into a new level. This paper start...Heilongjiang Province is an important marketable grain depot in China. Since the reform and opening up, Heilongjiang Province production capacity of foodstuff is increasingly growing into a new level. This paper started with the actuality of Heilongjiang Province integrated production capacity of foodstuff, and analyzed its major factors empirically through the mathematical model, then proposed some measures to enhance Heilongjiang Province production capacity of foodstuff which ensured China foodstuff security展开更多
With the reform of rural network enterprise system,the speed of transfer property rights in rural power enterprises is accelerated.The evaluation of the operation and development status of rural power enterprises is d...With the reform of rural network enterprise system,the speed of transfer property rights in rural power enterprises is accelerated.The evaluation of the operation and development status of rural power enterprises is directly related to the future development and investment direction of rural power enterprises.At present,the evaluation of the production and operation of rural network enterprises and the development status of power network only relies on the experience of the evaluation personnel,sets the reference index,and forms the evaluation results through artificial scoring.Due to the strong subjective consciousness of the evaluation results,the practical guiding significance is weak.Therefore,distributed data mining method in rural power enterprises status evaluation was proposed which had been applied in many fields,such as food science,economy or chemical industry.The distributed mathematical model was established by using principal component analysis(PCA)and regression analysis.By screening various technical indicators and determining their relevance,the reference value of evaluation results was improved.Combined with statistical program for social sciences(SPSS)data analysis software,the operation status of rural network enterprises was evaluated,and the rationality,effectiveness and economy of the evaluation was verified through comparison with current evaluation results and calculation examples of actual grid operation data.展开更多
Objective To explore the glycation of basic fibroblast grow th factor( bFGF) in diabetic skin.Methods The abdom inal full-thickness skin tissues from 58 patients( 29 diabetic and 29 non-diabetic) aged 40 to69 years an...Objective To explore the glycation of basic fibroblast grow th factor( bFGF) in diabetic skin.Methods The abdom inal full-thickness skin tissues from 58 patients( 29 diabetic and 29 non-diabetic) aged 40 to69 years and granulation tissues from 15 patients( 8 diabetic and 7 non-diabetic) aged 50 to 59 were analyzed.The proportion of advanced glycation end products( AGEs)-b FG F intotal b FGF was measured with co-immunoprecipitation and the histological characteristics of wound skin were detected with hem atoxylin and eosin staining. The cell viability, apoptosis, and angiogenesis of human derm al m icrovascular endothelial cells( HDMECs) after exposure to AG Es-b FG For bFGF were measured with cell counting kit-8, flow cytom etry,and tube form ation assay, respectively. Results The proportion of AG Es-b FG F in total b FG F showed agedependent increaseboth in diabetic and non-diabetic skin. As com pared with non-diabetic skin, the constituent ratio in diabetic skin increased significantly in the equal age-group, and the same result could be obtained in granulation tissues from patients aged 50 to 59. The proportion of AG Es-b FG F in diabetic granulation was low er than that in diabetic skin from patients aged 50 to 59. H istological analysis show ed few er vessels in diabetic skin wound. In vitro, the viability and vascularization of H D M EC s were promoted by b FG F and inhibited after exposure to AGEs-bFGF for 7d. Conclusion The present study indicates that one cause for im paired wound healing in diabetic skin could be the glycated b FG F and its changed angiogenic function.展开更多
针对金刚石滚轮是一种回转体零件以及其加工制造过程中信息化集成程度低等特点,对金刚石滚轮的特征信息提取、特征加工方案决策、数控程序后置处理等关键技术进行了研究,采用了产品模型数据交换标准STEP AP 242,实现对金刚石滚轮的制造...针对金刚石滚轮是一种回转体零件以及其加工制造过程中信息化集成程度低等特点,对金刚石滚轮的特征信息提取、特征加工方案决策、数控程序后置处理等关键技术进行了研究,采用了产品模型数据交换标准STEP AP 242,实现对金刚石滚轮的制造特征信息提取,使用STEP AP 242和PDM相结合的集成方式,将金刚石滚轮三维模型作为制造加工信息的载体,并选择SolidWorks作为CAD和CAM软件,以及选择Aras Innovator作为PDM平台,使用C#编程语言和数据库技术开发了金刚石滚轮CAD/CAPP/CAM/PDM集成系统,并进行了实例验证。展开更多
规模化农业机械化生产单位在促进土地流转、提高农业机械化水平等方面发挥了巨大作用,农机合作社是规模化生产单位的代表,评价农机合作社总体经营效果对促进农机合作社和其他新型农业生产经营主体的健康发展具有重要意义。以黑龙江省13...规模化农业机械化生产单位在促进土地流转、提高农业机械化水平等方面发挥了巨大作用,农机合作社是规模化生产单位的代表,评价农机合作社总体经营效果对促进农机合作社和其他新型农业生产经营主体的健康发展具有重要意义。以黑龙江省13个地市农机合作社为研究对象,采用Spearman样本正态性(p=0.01)双侧检验方法确定投入和产出评价指标;建立CCR模型(Charnes Cooper Rhodes,CCR)和超效率DEA模型(Super efficiency-DEA)评价黑龙江省13个地市农机合作社的总体效率;引入Malmquist指数评价分析了黑龙江省农机合作社效率动态变化情况。研究结果表明,黑龙江省各地市农机合作社总体效率较高,但不同地市农机合作社超效率和综合效率差异较大,同地市农机合作社不同分析期的总体效率变动也较大;分析期内黑龙江省各地市农机合作社全要素生产率呈先快后缓的增加趋势,平均全要素生产率呈正增长的地市有5个,占比38.46%。研究结果可为农机合作社等新型农业生产经营主体高质量发展提供理论与技术支撑。展开更多
With the development of information technology,a large number of product quality data in the entire manufacturing process is accumulated,but it is not explored and used effectively.The traditional product quality pred...With the development of information technology,a large number of product quality data in the entire manufacturing process is accumulated,but it is not explored and used effectively.The traditional product quality prediction models have many disadvantages,such as high complexity and low accuracy.To overcome the above problems,we propose an optimized data equalization method to pre-process dataset and design a simple but effective product quality prediction model:radial basis function model optimized by the firefly algorithm with Levy flight mechanism(RBFFALM).First,the new data equalization method is introduced to pre-process the dataset,which reduces the dimension of the data,removes redundant features,and improves the data distribution.Then the RBFFALFM is used to predict product quality.Comprehensive expe riments conducted on real-world product quality datasets validate that the new model RBFFALFM combining with the new data pre-processing method outperforms other previous me thods on predicting product quality.展开更多
Product family(PF) is the most important part of product platform. A new method is proposed to mine PF based on multi-space product data in PLM database. Product structure tree(PST) and bill of material(BOM) are used ...Product family(PF) is the most important part of product platform. A new method is proposed to mine PF based on multi-space product data in PLM database. Product structure tree(PST) and bill of material(BOM) are used as the data source. A PF can be obtained by mining physics space, logic space and attribute space of product data. In this work, firstly, a PLM database is described, consisting of data organization form, data structure, and data characteristics. Then the PF mining method introduces the sequence alignment techniques used in bio-informatics, which mainly includes data pre-processing, regularization, mining algorithm and cluster analysis. Finally, the feasibility and effectiveness of the proposed method are verified by a case study of high and middle pressure valve, demonstrating a feasible method to obtain PF from PLM database.展开更多
The coupling model of major influence factors such state affecting the chloride diffusion process in concrete is as environmental relative humidity, load-induced crack and stress discussed. The probability distributio...The coupling model of major influence factors such state affecting the chloride diffusion process in concrete is as environmental relative humidity, load-induced crack and stress discussed. The probability distributions of the critical chloride concentration Cc, the chloride diffusion coefficient D, and the surface chloride concentration Cs were determined based on the collected natural exposure data. And the estimation of probability of corrosion initiation considering the coupling effects of influence factors is presented. It is found that the relative humidity and curing time are the most effective factors affecting the probability of corrosion initiation before and after 10 years of exposure time. At the same exposure time, the influence of load-induced crack and stress state on the probability of corrosion initiation is obvious, in which the effect of crack is the most one展开更多
Based on the statistical characteristics of remote sensing data, the spatial geometric structure characteristics of spectral data and distribution of background, interference and alteration information in characterist...Based on the statistical characteristics of remote sensing data, the spatial geometric structure characteristics of spectral data and distribution of background, interference and alteration information in characteristic space were researched through the analysis of two-dimensional and three-dimensional scatter diagrams. The results indicate that the hyper-space of remote sensing multi-data aggregation belongs to low-dimensional geometric structure, i.e. hyperplane form, and anomalous point groups including alteration information usually dissociate out of hyperplane. Scatter diagrams of remote sensing data band are mainly presented as two distribution forms of single-ellipse and dual-ellipse. Clarifying the relations of three objects of background, disturbance and alteration information in remote sensing images provides an important technical thought and guidance for accurately detecting and extracting remote sensing alteration information.展开更多
基金Supported by the Achievement of Program for New Century Excellent Talents in Heilongjiang Province (1153-NCET-004)Project of Postdoctoral Scientific Research Launch Foundation in Heilongjiang Province
文摘Heilongjiang Province is an important marketable grain depot in China. Since the reform and opening up, Heilongjiang Province production capacity of foodstuff is increasingly growing into a new level. This paper started with the actuality of Heilongjiang Province integrated production capacity of foodstuff, and analyzed its major factors empirically through the mathematical model, then proposed some measures to enhance Heilongjiang Province production capacity of foodstuff which ensured China foodstuff security
基金Supported by Funding(2017RAXXJ075)from Harbin Applied Technology Research and Development Project
文摘With the reform of rural network enterprise system,the speed of transfer property rights in rural power enterprises is accelerated.The evaluation of the operation and development status of rural power enterprises is directly related to the future development and investment direction of rural power enterprises.At present,the evaluation of the production and operation of rural network enterprises and the development status of power network only relies on the experience of the evaluation personnel,sets the reference index,and forms the evaluation results through artificial scoring.Due to the strong subjective consciousness of the evaluation results,the practical guiding significance is weak.Therefore,distributed data mining method in rural power enterprises status evaluation was proposed which had been applied in many fields,such as food science,economy or chemical industry.The distributed mathematical model was established by using principal component analysis(PCA)and regression analysis.By screening various technical indicators and determining their relevance,the reference value of evaluation results was improved.Combined with statistical program for social sciences(SPSS)data analysis software,the operation status of rural network enterprises was evaluated,and the rationality,effectiveness and economy of the evaluation was verified through comparison with current evaluation results and calculation examples of actual grid operation data.
基金National Natural Science Foundation of China(81071568,81272111)National Science and Technology Support Plan(2012BAI11B00)
文摘Objective To explore the glycation of basic fibroblast grow th factor( bFGF) in diabetic skin.Methods The abdom inal full-thickness skin tissues from 58 patients( 29 diabetic and 29 non-diabetic) aged 40 to69 years and granulation tissues from 15 patients( 8 diabetic and 7 non-diabetic) aged 50 to 59 were analyzed.The proportion of advanced glycation end products( AGEs)-b FG F intotal b FGF was measured with co-immunoprecipitation and the histological characteristics of wound skin were detected with hem atoxylin and eosin staining. The cell viability, apoptosis, and angiogenesis of human derm al m icrovascular endothelial cells( HDMECs) after exposure to AG Es-b FG For bFGF were measured with cell counting kit-8, flow cytom etry,and tube form ation assay, respectively. Results The proportion of AG Es-b FG F in total b FG F showed agedependent increaseboth in diabetic and non-diabetic skin. As com pared with non-diabetic skin, the constituent ratio in diabetic skin increased significantly in the equal age-group, and the same result could be obtained in granulation tissues from patients aged 50 to 59. The proportion of AG Es-b FG F in diabetic granulation was low er than that in diabetic skin from patients aged 50 to 59. H istological analysis show ed few er vessels in diabetic skin wound. In vitro, the viability and vascularization of H D M EC s were promoted by b FG F and inhibited after exposure to AGEs-bFGF for 7d. Conclusion The present study indicates that one cause for im paired wound healing in diabetic skin could be the glycated b FG F and its changed angiogenic function.
文摘针对金刚石滚轮是一种回转体零件以及其加工制造过程中信息化集成程度低等特点,对金刚石滚轮的特征信息提取、特征加工方案决策、数控程序后置处理等关键技术进行了研究,采用了产品模型数据交换标准STEP AP 242,实现对金刚石滚轮的制造特征信息提取,使用STEP AP 242和PDM相结合的集成方式,将金刚石滚轮三维模型作为制造加工信息的载体,并选择SolidWorks作为CAD和CAM软件,以及选择Aras Innovator作为PDM平台,使用C#编程语言和数据库技术开发了金刚石滚轮CAD/CAPP/CAM/PDM集成系统,并进行了实例验证。
文摘规模化农业机械化生产单位在促进土地流转、提高农业机械化水平等方面发挥了巨大作用,农机合作社是规模化生产单位的代表,评价农机合作社总体经营效果对促进农机合作社和其他新型农业生产经营主体的健康发展具有重要意义。以黑龙江省13个地市农机合作社为研究对象,采用Spearman样本正态性(p=0.01)双侧检验方法确定投入和产出评价指标;建立CCR模型(Charnes Cooper Rhodes,CCR)和超效率DEA模型(Super efficiency-DEA)评价黑龙江省13个地市农机合作社的总体效率;引入Malmquist指数评价分析了黑龙江省农机合作社效率动态变化情况。研究结果表明,黑龙江省各地市农机合作社总体效率较高,但不同地市农机合作社超效率和综合效率差异较大,同地市农机合作社不同分析期的总体效率变动也较大;分析期内黑龙江省各地市农机合作社全要素生产率呈先快后缓的增加趋势,平均全要素生产率呈正增长的地市有5个,占比38.46%。研究结果可为农机合作社等新型农业生产经营主体高质量发展提供理论与技术支撑。
基金supported by the National Science and Technology Innovation 2030 Next-Generation Artifical Intelligence Major Project(2018AAA0101801)the National Natural Science Foundation of China(72271188)。
文摘With the development of information technology,a large number of product quality data in the entire manufacturing process is accumulated,but it is not explored and used effectively.The traditional product quality prediction models have many disadvantages,such as high complexity and low accuracy.To overcome the above problems,we propose an optimized data equalization method to pre-process dataset and design a simple but effective product quality prediction model:radial basis function model optimized by the firefly algorithm with Levy flight mechanism(RBFFALM).First,the new data equalization method is introduced to pre-process the dataset,which reduces the dimension of the data,removes redundant features,and improves the data distribution.Then the RBFFALFM is used to predict product quality.Comprehensive expe riments conducted on real-world product quality datasets validate that the new model RBFFALFM combining with the new data pre-processing method outperforms other previous me thods on predicting product quality.
基金Project(51275362)supported by the National Natural Science Foundation of ChinaProject(2014ZX04015021)supported by National Science and Technology Major Project,China
文摘Product family(PF) is the most important part of product platform. A new method is proposed to mine PF based on multi-space product data in PLM database. Product structure tree(PST) and bill of material(BOM) are used as the data source. A PF can be obtained by mining physics space, logic space and attribute space of product data. In this work, firstly, a PLM database is described, consisting of data organization form, data structure, and data characteristics. Then the PF mining method introduces the sequence alignment techniques used in bio-informatics, which mainly includes data pre-processing, regularization, mining algorithm and cluster analysis. Finally, the feasibility and effectiveness of the proposed method are verified by a case study of high and middle pressure valve, demonstrating a feasible method to obtain PF from PLM database.
基金Project(50925829) supported by the National Science Fund for Distinguished Young Scholars of ChinaProject(50908148) supported by the National Natural Science Foundation of ChinaProjects(2009-K4-23,2010-11-33) supported by the Research of Ministry of Housing and Urban Rural Development of China
文摘The coupling model of major influence factors such state affecting the chloride diffusion process in concrete is as environmental relative humidity, load-induced crack and stress discussed. The probability distributions of the critical chloride concentration Cc, the chloride diffusion coefficient D, and the surface chloride concentration Cs were determined based on the collected natural exposure data. And the estimation of probability of corrosion initiation considering the coupling effects of influence factors is presented. It is found that the relative humidity and curing time are the most effective factors affecting the probability of corrosion initiation before and after 10 years of exposure time. At the same exposure time, the influence of load-induced crack and stress state on the probability of corrosion initiation is obvious, in which the effect of crack is the most one
基金Project(2006BAB01A06) supported by the National Science and Technology Pillar Program Project during the 11th Five-Year Plan PeriodProject(1212010761503) supported by Land and Resources Investigation Project
文摘Based on the statistical characteristics of remote sensing data, the spatial geometric structure characteristics of spectral data and distribution of background, interference and alteration information in characteristic space were researched through the analysis of two-dimensional and three-dimensional scatter diagrams. The results indicate that the hyper-space of remote sensing multi-data aggregation belongs to low-dimensional geometric structure, i.e. hyperplane form, and anomalous point groups including alteration information usually dissociate out of hyperplane. Scatter diagrams of remote sensing data band are mainly presented as two distribution forms of single-ellipse and dual-ellipse. Clarifying the relations of three objects of background, disturbance and alteration information in remote sensing images provides an important technical thought and guidance for accurately detecting and extracting remote sensing alteration information.
