productivity function
1.Based on analyses of the productivity theory and methods, two methods were developed to estimate the profit portion of mechanization in the agricultural industry by the Cobb Douglas production function and a comparison of mechanization and no mechanization in agricultural industry.
2.Indexes of landscape pattern and serve function value of ecosystem, and extracting the data by ArcView from the digital land cover mapping which scale is 1∶100 000 are used in the assessment. The types of ecological economy system in Jilin Province are divided in order to facilitate the valid use of land resources and the reasonable arrangement of agr-productivity.
3.Based on the analysis in the gear processing foundation at present, discusses the gear parameter free-space diagram and the function model which improved the gear processing quality and the productivity technique, obtaines control aspect consummation of gear manufacture process and craft equipment, choice of reasonable craft parameter, optimization technological process, carries on the analysis by taking the broach as an example.
4.Abstract: Forest ecosystem management takes forests as a com plex ecosystem.In the process of managing and utilizing forest resources,the eco system should be maintained in a healthy and integrated state,and its function be kept for a long time in good condition.For this purpose,the paper puts forward a basic unit-dividing method for forest ecosystem management,using subcompartm ent dividing combined with forest type dividing.It also discusses the relations of forest structure with ecosystem productivity,productive potentiality and biod iversity under forest ecosystem management.
5.The paper has comprehensively designed a system of automatic hydraulic speed regulating for haulage unit of shearcr. The system possessing multi-function not only extends the using range of snearer and increases the productivity to the greatest extent under various compli- cated working cnditions, but also is superior to the domestic shearers cur- rently used in economic indexes, such as full utilization of motor efficien- cy, energy saving, increase of shearer performance ete
6.Forest ecosystem management takes forests as a com plex ecosystem.In the process of managing and utilizing forest resources,the eco system should be maintained in a healthy and integrated state,and its function be kept for a long time in good condition.For this purpose,the paper puts forward a basic unit-dividing method for forest ecosystem management,using subcompartm ent dividing combined with forest type dividing.It also discusses the relations of forest structure with ecosystem productivity,productive potentiality and biod iversity under forest ecosystem management.
