Cell Evolutionary Algorithm: a New Optimization Method on Ground-State Energy of the Atomic

The purpose of this paper is to present a new general approach to solve ground-state energies of the double-electron systems in a uniform magnetic field, in which the basic element of evolution is the set in the solution space, rather than the point. The paper defines the Cell Evolutionary Algorithm, which implements such a view of the evolution mechanism. First, the optimal set in which the optimal solution may be obtained. Then this approach applies the embedded search method to get the optimal solution. We tested this approach on the atomic structure, and the results show that it can improve not only the efficiency but also the accuracy of the calculations as it relates to this specific problem.

地布覆盖对渭北旱塬苹果园土壤水热效应及产量品质的影响

研究了陕西渭北旱塬苹果园地布和黑色地膜覆盖对土壤水分、温度、叶片光合作用、果实产量和品质的影响。结果表明,果树生育期内,地布和地膜覆盖分别比对照节水35.1、28.9mm,显著提高了土壤含水率;春季,地布和地膜覆盖0-25cm土层平均地温分别比对照高2.8℃和4.5℃,夏季则分别高-0.3℃和4.1℃;同时,地布和地膜覆盖分别比对照增产32%和20.4%,且地布覆盖显著提高了果树的净光合速率、气孔导度、胞间二氧化碳摩尔分数、可溶性固形物、果实的亮度和红色度,降低了果实酸度。