A company is usually founded by individuals striving to achieve their own or broader goals. Goal achievement related to a company＇s operations is called business or the business process. Human capital （man＇s work, ...A company is usually founded by individuals striving to achieve their own or broader goals. Goal achievement related to a company＇s operations is called business or the business process. Human capital （man＇s work, employees） is an important element of the business process, however its value is not disclosed on the assets side of the classical balance sheet. In order to shown assets, human capital has to be evaluated. Evaluation can be made in monetary or non-monetary terms. Non-monetary models for evaluating human capital include organisational and behavioural variables. These variables are not expressed in monetary terms, however, based on changes in their quality, one can assume the increased or decreased value of human capital within the company. The value of non-monetary models should not be underestimated, however monetary models are of greater importance. In this article, the most significant non-monetary and monetary models of human capital evaluation are discussed. Among non-monetary models the Michigan, Flamholz, and Ogan models are discussed. Among monetary models the replacement costs model, the opportunity costs model, the discounted wages and salaries model, and originally created dynamic model are discussed. A descriptive approach is used to identify the basic characteristics of existing models for evaluating human capital. According to these findings a different approach is taken in developing an original model. Dynamic model can efficiently overcome most of the practical problems and can be used as an appropriate estimator of human capital value expressed in monetary terms. The research limitations are that the dynamic model has not been sufficiently verified in practice. The model could prove to be directly applicable in those enterprises that would like to define the value of their human capital.展开更多
In view of the effect of fissure water in fractured rock mass on the strength of rock mass in engineering projects, we pre-pared specimens of cement mortar to simulate saturated rock mass with continuous fractures of ...In view of the effect of fissure water in fractured rock mass on the strength of rock mass in engineering projects, we pre-pared specimens of cement mortar to simulate saturated rock mass with continuous fractures of different slope angles. By exerting static and dynamic loads on the specimens, the mechanical characteristics of rock mass with fissure water under these loads can be analyzed. Our experimental results indicate that the static compressive strength of saturated fractured rock mass is related to the slope angle. The lowest compressive strength of fractured rock mass occurs when the slope angle is 45°, while the highest strength occurs when the specimen has no fractures. Fissure water can weaken the strength of rock mass. The softening coefficient does not vary with the slope angle and type of load. The hydrodynamic pressure of fractured rock mass gradually increases with an increase in dynamic load. For a 0° slope angle, the hydrodynamic pressure reaches its highest level. When the slope angle is 90°, the hydro-dynamic pressure is the lowest.展开更多
Time, cost, and quality are three key control factors in rockfill dam construction, and the tradeoff among them is important. Research has focused on the construction time-cost-quality tradeoff for the planning or des...Time, cost, and quality are three key control factors in rockfill dam construction, and the tradeoff among them is important. Research has focused on the construction time-cost-quality tradeoff for the planning or design phase, built on static empirical data. However, due to its intrinsic uncertainties, rockfill dam construction is a dynamic process which requires the tradeoffto adjust dynamically to changes in construction conditions. In this study, a dynamic time-cost-quality tradeoff （DTCQT） method is proposed to balance time, cost, and quality at any stage of the construction process. A time-cost-quality tradeoff model is established that considers time cost and quality cost. Time, cost, and quality are dynamically estimated based on real-time monitoring. The analytic hierarchy process （AHP） method is applied to quantify the decision preferences among time, cost, and quality as objective weights. In addition, an improved non-dominated sorting genetic algorithm （NSGA-II） coupled with the technique for order preference by similarity to ideal solution （TOPSIS） method is used to search for the optimal compromise solution. A case study project is analyzed to demonstrate the applicability of the method, and the efficiency of the proposed optimization method is compared with that of the linear weighted sum （LWS） and NSGA-II.展开更多
文摘A company is usually founded by individuals striving to achieve their own or broader goals. Goal achievement related to a company＇s operations is called business or the business process. Human capital （man＇s work, employees） is an important element of the business process, however its value is not disclosed on the assets side of the classical balance sheet. In order to shown assets, human capital has to be evaluated. Evaluation can be made in monetary or non-monetary terms. Non-monetary models for evaluating human capital include organisational and behavioural variables. These variables are not expressed in monetary terms, however, based on changes in their quality, one can assume the increased or decreased value of human capital within the company. The value of non-monetary models should not be underestimated, however monetary models are of greater importance. In this article, the most significant non-monetary and monetary models of human capital evaluation are discussed. Among non-monetary models the Michigan, Flamholz, and Ogan models are discussed. Among monetary models the replacement costs model, the opportunity costs model, the discounted wages and salaries model, and originally created dynamic model are discussed. A descriptive approach is used to identify the basic characteristics of existing models for evaluating human capital. According to these findings a different approach is taken in developing an original model. Dynamic model can efficiently overcome most of the practical problems and can be used as an appropriate estimator of human capital value expressed in monetary terms. The research limitations are that the dynamic model has not been sufficiently verified in practice. The model could prove to be directly applicable in those enterprises that would like to define the value of their human capital.
基金support for this work, provided by the National Natural Science Foundation of China (No50534040)
文摘In view of the effect of fissure water in fractured rock mass on the strength of rock mass in engineering projects, we pre-pared specimens of cement mortar to simulate saturated rock mass with continuous fractures of different slope angles. By exerting static and dynamic loads on the specimens, the mechanical characteristics of rock mass with fissure water under these loads can be analyzed. Our experimental results indicate that the static compressive strength of saturated fractured rock mass is related to the slope angle. The lowest compressive strength of fractured rock mass occurs when the slope angle is 45°, while the highest strength occurs when the specimen has no fractures. Fissure water can weaken the strength of rock mass. The softening coefficient does not vary with the slope angle and type of load. The hydrodynamic pressure of fractured rock mass gradually increases with an increase in dynamic load. For a 0° slope angle, the hydrodynamic pressure reaches its highest level. When the slope angle is 90°, the hydro-dynamic pressure is the lowest.
基金Project supported by the Innovative Research Groups of the National Natural Science Foundation of China （No. 51621092）, the National Basic Research Program （973 Program） of China （No. 2013CB035904）, and the Natural Science Foundation of China （No. 51439005）
文摘Time, cost, and quality are three key control factors in rockfill dam construction, and the tradeoff among them is important. Research has focused on the construction time-cost-quality tradeoff for the planning or design phase, built on static empirical data. However, due to its intrinsic uncertainties, rockfill dam construction is a dynamic process which requires the tradeoffto adjust dynamically to changes in construction conditions. In this study, a dynamic time-cost-quality tradeoff （DTCQT） method is proposed to balance time, cost, and quality at any stage of the construction process. A time-cost-quality tradeoff model is established that considers time cost and quality cost. Time, cost, and quality are dynamically estimated based on real-time monitoring. The analytic hierarchy process （AHP） method is applied to quantify the decision preferences among time, cost, and quality as objective weights. In addition, an improved non-dominated sorting genetic algorithm （NSGA-II） coupled with the technique for order preference by similarity to ideal solution （TOPSIS） method is used to search for the optimal compromise solution. A case study project is analyzed to demonstrate the applicability of the method, and the efficiency of the proposed optimization method is compared with that of the linear weighted sum （LWS） and NSGA-II.
