background and objectivesintercropping or simultaneous growing of two or more crops on the same piece of land has the potential of enhanced ecosystem productivity. in a cereal-legume intercropping system, an increase in cereal and a decrease in legume intercrop yield is reported. several indices such as land equivalent ratio (ler), relative crowding coefficient (k), competitive ratio (cr), aggr...

Good afternoon. I am pleased to participate in the Cleveland Clinic’s “Ideas for Tomorrow” series. My public remarks often concern short-run economic developments, but it is important once in a while to place those shorter-term developments in the context of the powerful longterm trends shaping the global economy. Of these trends, surely one of the most important is the rapid and sustained econ...

This paper attempts to simulate the development status of Xi’an City from 2012 to 2025 with the method of Systems Dynamics (SD), in order to provide a reference for the future development of Xi’an city. On the basis of theoretical analysis and empirical analysis, in 2025, the carrying capacity indexes of 5 socio-economic development schemes from the highest to the lowest are status-continuous s...

Making targeted subsidies and the process of releasing energy market and specified criteria for the quality of energy delivered to consumers shows the necessity for the explanation of energy production in Iran. In the meantime, thermal power plants produce about 85% of electricity in Iran. Steam and gas turbine power plants have created the vast capacity of power generation in thermal plants, b...