摘要：本文筒略地介绍了钢管砼新理论——统一理论——的基本内容.统一理论的提出结束了依靠试验曲线宏观地了解钢管砼构件的工作性能,改变了传统的研究方法和传统的设计方法,使这一结构的研究和发展步入了新阶段.

摘要：A computer analysis of solar heating has been performed for Palestine. Results are presented for a prototype building using either fuel oil or gas under different heating loads in three climatic regions (Jordan valley, coastal, and hilly). Cumulative cost flows are compared for the life-cycle present value technique. Optimum design magnitudes are determined for maximum life-cycle savings. The payback period for capital invested in a solar system, and total savings are found for the optimum conditions. Variations of system performance are estimated. The effects of collector slope, proportionate storage tank volume, heat-exchanger parameters, and the design load on system performance are studied. Finally the economics of solar heating in Palestine are discussed and recommendations are made for increased utilization of solar energy.