Based on the characteristics and employment situation of incoming labors,we should attach great importance to their training.With rich teaching resources,the higher vocational colleges should give full play to their a...Based on the characteristics and employment situation of incoming labors,we should attach great importance to their training.With rich teaching resources,the higher vocational colleges should give full play to their advantages,get involved in the training,and enhance their studies of training models.展开更多
In this paper, a two\|sector growth model is given. The labor force transfer process from agricultural sector to industrial sector is exogenous determined. By introducing the labor force transferring function, a two\|...In this paper, a two\|sector growth model is given. The labor force transfer process from agricultural sector to industrial sector is exogenous determined. By introducing the labor force transferring function, a two\|dimension nonautonomous differential equation is obtained. The results of the model manifest that the labor force transfer delays industrial sector growth and accelerates the agricultural sector growth. It is proved that the solution of the model is asymptotic stable. By the numerical analysis, the economic growth and labor force transfer is presented under the specific parameters.展开更多
We establish the two-sector economy model including the urban sector and the rural sector, derive the labor demand curve of the urban sector and rural sector under the condition of balanced production decisions with b...We establish the two-sector economy model including the urban sector and the rural sector, derive the labor demand curve of the urban sector and rural sector under the condition of balanced production decisions with benefit maximization, and analyze the labor flow when in the short-term or long-term two-sector economic equilibrium. The results show that rising wages caused by short-term internal and external impact increases the pressure on the employment in two sectors, and the urban sector is difficult to absorb the surplus labor of the rural sector. However, under the conditions of free flow of factors and fully competitive market, the wage variation arising from the long-term endogenous evolution, leads to inversely proportional relationship between the demand for labor in the urban and rural sectors, which is conducive to the transfer of rural labor force. Based on microeconomic survey data of labor flow in urban-rural coordination experimental zones in Chongqing City, this paper makes an empirical study of the main factors having a short-term impact on the labor transfer, and the results show that education level and the opportunity to participate in the training are important factors.展开更多
Based on the research introduction of domestic and foreign scholars,dynamic equilibrium between the rural labor force flow and the price of agricultural product is analyzed by VEC model,according to the data of the ru...Based on the research introduction of domestic and foreign scholars,dynamic equilibrium between the rural labor force flow and the price of agricultural product is analyzed by VEC model,according to the data of the rural labor force flow and the price of agricultural products in the years 1990-2007.Chows breakpoint test is used to measure the stage characteristics of the impact of rural labor force flow on the price of agricultural product.Result shows that there is a long-term and stationary relationship between the flow quantity of rural labor force and the price of agricultural product.Rural labor force flow,as an exogenous force,affects the agricultural production,and further influences the price fluctuation of agricultural products.Impact of rural labor force flow on the price of agricultural product is from weak to strong,then grows gradually weaker,and reaches its peak value at the year 1998.With the development of rural society and economy and the market process,rural labor force flow endogenously affects the price of agricultural product,which has periodic characteristics.In order to achieve a dual stabilization of the rural labor force flow and the price of agricultural products,the following countermeasures are put forward:vigorously developing vocational education,increasing the support for agricultural production,and making active employment measures.展开更多
This paper is the first to use a non-parameter additive model in the empirical analysis of the impact of cross-regional laborflow on industrialization and economic growth in China’s eastern,central and western region...This paper is the first to use a non-parameter additive model in the empirical analysis of the impact of cross-regional laborflow on industrialization and economic growth in China’s eastern,central and western regions.Results indicate that laborflow has significantly different effects on the direction and intensity of impact on economic development across regions:massive labor inflow from the central and western regions to the eastern region significantly promoted the industrializationprocess and economic growth in the East,while the impact of labor outflow from the central and western regions on theregional economies is in a significantly inverted-U shaped non-linear relationship.Uneven labor flow across regions haswidened China’s regional economic disparities.展开更多
目的基于随机森林算法构建子痫前期(PE)产妇阴道试产的预测模型。方法回顾性纳入南通大学附属医院2021年1月至2024年12月的203例PE产妇,按7∶3比例将样本随机分为训练集(140例)与内部验证集(63例),训练集根据阴道试产结局分为失败组(37...目的基于随机森林算法构建子痫前期(PE)产妇阴道试产的预测模型。方法回顾性纳入南通大学附属医院2021年1月至2024年12月的203例PE产妇,按7∶3比例将样本随机分为训练集(140例)与内部验证集(63例),训练集根据阴道试产结局分为失败组(37例)与成功组(103例)。采用多因素logistic回归筛选独立预测因素,并基于R语言分别构建logistic回归与随机森林预测模型,比较二者的效能。结果年龄、试产前体重指数(BMI)、试产前最近1次胎儿脐动脉收缩期/舒张期血流比值(S/D)、24 h蛋白尿水平、宫颈成熟度(Bishop)评分是PE产妇阴道试产失败的影响因素(P<0.05)。随机森林模型的重要性排序从大到小分别是24 h蛋白尿水平、试产前最近1次胎儿脐动脉S/D、年龄、BMI、Bishop评分,该模型在训练集和验证集中均表现优异,预测效能优于logistic回归模型[训练集曲线下面积(AUC):0.919 vs 0.699;验证集AUC:0.946 vs 0.753](Z=3.629、2.512,P<0.05)。校准曲线显示,两个模型训练集和验证集的预测概率与实际发生率均有较好的一致性。结论PE产妇阴道试产结局受年龄、BMI、试产前最近1次胎儿脐动脉S/D、24 h蛋白尿水平、Bishop评分等因素影响,通过随机森林算法构建的预测模型展现出较好的预测效能,为临床决策提供科学依据。展开更多
基金Supported by the "Twelfth-Five Year" Research Project of National Agricultural Vocational Educationthe Program of Jiangsu society of Technical and Vocational Education(2010007)
文摘Based on the characteristics and employment situation of incoming labors,we should attach great importance to their training.With rich teaching resources,the higher vocational colleges should give full play to their advantages,get involved in the training,and enhance their studies of training models.
文摘In this paper, a two\|sector growth model is given. The labor force transfer process from agricultural sector to industrial sector is exogenous determined. By introducing the labor force transferring function, a two\|dimension nonautonomous differential equation is obtained. The results of the model manifest that the labor force transfer delays industrial sector growth and accelerates the agricultural sector growth. It is proved that the solution of the model is asymptotic stable. By the numerical analysis, the economic growth and labor force transfer is presented under the specific parameters.
基金Supported by Key Project of the National Social Science Fund(12ASH004)National Soft Science Research Project(2008GXQ6D172)+3 种基金National Soft Science Fund Project(2007GXS3D094)Social Science Planning Fund,Ministry of Education(07JA790104)Chongqing Social Science Planning Project(2010YBJJ13)the Fundamental Research Funds for the Central Universities(XDJK2010C103)
文摘We establish the two-sector economy model including the urban sector and the rural sector, derive the labor demand curve of the urban sector and rural sector under the condition of balanced production decisions with benefit maximization, and analyze the labor flow when in the short-term or long-term two-sector economic equilibrium. The results show that rising wages caused by short-term internal and external impact increases the pressure on the employment in two sectors, and the urban sector is difficult to absorb the surplus labor of the rural sector. However, under the conditions of free flow of factors and fully competitive market, the wage variation arising from the long-term endogenous evolution, leads to inversely proportional relationship between the demand for labor in the urban and rural sectors, which is conducive to the transfer of rural labor force. Based on microeconomic survey data of labor flow in urban-rural coordination experimental zones in Chongqing City, this paper makes an empirical study of the main factors having a short-term impact on the labor transfer, and the results show that education level and the opportunity to participate in the training are important factors.
文摘Based on the research introduction of domestic and foreign scholars,dynamic equilibrium between the rural labor force flow and the price of agricultural product is analyzed by VEC model,according to the data of the rural labor force flow and the price of agricultural products in the years 1990-2007.Chows breakpoint test is used to measure the stage characteristics of the impact of rural labor force flow on the price of agricultural product.Result shows that there is a long-term and stationary relationship between the flow quantity of rural labor force and the price of agricultural product.Rural labor force flow,as an exogenous force,affects the agricultural production,and further influences the price fluctuation of agricultural products.Impact of rural labor force flow on the price of agricultural product is from weak to strong,then grows gradually weaker,and reaches its peak value at the year 1998.With the development of rural society and economy and the market process,rural labor force flow endogenously affects the price of agricultural product,which has periodic characteristics.In order to achieve a dual stabilization of the rural labor force flow and the price of agricultural products,the following countermeasures are put forward:vigorously developing vocational education,increasing the support for agricultural production,and making active employment measures.
基金is funded by the National Natural Science Fund (70902039)and Fujian Provincial Natural Fund Program (2009105163).
文摘This paper is the first to use a non-parameter additive model in the empirical analysis of the impact of cross-regional laborflow on industrialization and economic growth in China’s eastern,central and western regions.Results indicate that laborflow has significantly different effects on the direction and intensity of impact on economic development across regions:massive labor inflow from the central and western regions to the eastern region significantly promoted the industrializationprocess and economic growth in the East,while the impact of labor outflow from the central and western regions on theregional economies is in a significantly inverted-U shaped non-linear relationship.Uneven labor flow across regions haswidened China’s regional economic disparities.
文摘目的基于随机森林算法构建子痫前期(PE)产妇阴道试产的预测模型。方法回顾性纳入南通大学附属医院2021年1月至2024年12月的203例PE产妇,按7∶3比例将样本随机分为训练集(140例)与内部验证集(63例),训练集根据阴道试产结局分为失败组(37例)与成功组(103例)。采用多因素logistic回归筛选独立预测因素,并基于R语言分别构建logistic回归与随机森林预测模型,比较二者的效能。结果年龄、试产前体重指数(BMI)、试产前最近1次胎儿脐动脉收缩期/舒张期血流比值(S/D)、24 h蛋白尿水平、宫颈成熟度(Bishop)评分是PE产妇阴道试产失败的影响因素(P<0.05)。随机森林模型的重要性排序从大到小分别是24 h蛋白尿水平、试产前最近1次胎儿脐动脉S/D、年龄、BMI、Bishop评分,该模型在训练集和验证集中均表现优异,预测效能优于logistic回归模型[训练集曲线下面积(AUC):0.919 vs 0.699;验证集AUC:0.946 vs 0.753](Z=3.629、2.512,P<0.05)。校准曲线显示,两个模型训练集和验证集的预测概率与实际发生率均有较好的一致性。结论PE产妇阴道试产结局受年龄、BMI、试产前最近1次胎儿脐动脉S/D、24 h蛋白尿水平、Bishop评分等因素影响,通过随机森林算法构建的预测模型展现出较好的预测效能,为临床决策提供科学依据。
