Optimum growth and production of fruit crops is strongly linked to managing irrigation water. Various method of estimating tree water requirements have been utilized such as direct and indirect soil, water, and climat...Optimum growth and production of fruit crops is strongly linked to managing irrigation water. Various method of estimating tree water requirements have been utilized such as direct and indirect soil, water, and climatic measurements. Due to differences in fruit tree anatomical and morphological structures and their adaptation to excess and deficit soil water content, such estimates of irrigation water requirements may be more suitable for herbaceous plants but not as accurate for trees. Studies on temperate and tropical fruit trees, using apple (Malus domestica) and star-fruit (Averrhoa carambola), respectively, showed that tree water potential is highly correlated to soil water status. Irrigation based on climate data (ET) and monitoring of soil water resulted in no significant differences in soil or tree water status of orchard-grown fruit trees under temperate and subtropical climatic conditions. The results indicated the need for better understanding and utilization of tree physiological parameters for management of irrigation water of fruit crops. This will ultimately lead to achieving optimum yield and fruit quality while conserving water resources.展开更多
为了进一步提高无线多跳网络的吞吐量,采用物理干扰模型,考虑链路速率可以随信干噪比(signal tointerference plus noise ratio,SINR)动态可调,提出了基于位势博弈的传输调度算法。通过设计合适的位势函数,使得纳什均衡点的存在性和收...为了进一步提高无线多跳网络的吞吐量,采用物理干扰模型,考虑链路速率可以随信干噪比(signal tointerference plus noise ratio,SINR)动态可调,提出了基于位势博弈的传输调度算法。通过设计合适的位势函数,使得纳什均衡点的存在性和收敛性都得到保证。同时,每个参与者在最小化自己支付的同时,使全局函数达到最优。仿真结果表明,该算法具有较好的吞吐量性能,而且有较快的收敛速度。展开更多
嵌入式设备在调度多核多任务时,由于引入的处理器数量增多,导致调度效率低,以及能耗大等问题。基于此,提出基于实时动态电压频率调整(Dynamic voltage and frequency scaling,DVFS)的嵌入式多核多任务调度算法。构建嵌入式多核多任务能...嵌入式设备在调度多核多任务时,由于引入的处理器数量增多,导致调度效率低,以及能耗大等问题。基于此,提出基于实时动态电压频率调整(Dynamic voltage and frequency scaling,DVFS)的嵌入式多核多任务调度算法。构建嵌入式多核多任务能耗模型,得到不同情况下设备的能量消耗情况;建立多核多任务调度数学模型,在策略集合中找到合适的调度策略,保持时间值始终为最小;利用多核多任务调度算法机制,通过计算嵌入式设备中各个处理核的潜在负载能力,找出与预期负载最接近的处理核,并将任务分配到该任务核中,实现多核多任务的合理调度。实验结果表明,所提方法的调度效率高,且能量消耗低于3.5mW。展开更多
文摘Optimum growth and production of fruit crops is strongly linked to managing irrigation water. Various method of estimating tree water requirements have been utilized such as direct and indirect soil, water, and climatic measurements. Due to differences in fruit tree anatomical and morphological structures and their adaptation to excess and deficit soil water content, such estimates of irrigation water requirements may be more suitable for herbaceous plants but not as accurate for trees. Studies on temperate and tropical fruit trees, using apple (Malus domestica) and star-fruit (Averrhoa carambola), respectively, showed that tree water potential is highly correlated to soil water status. Irrigation based on climate data (ET) and monitoring of soil water resulted in no significant differences in soil or tree water status of orchard-grown fruit trees under temperate and subtropical climatic conditions. The results indicated the need for better understanding and utilization of tree physiological parameters for management of irrigation water of fruit crops. This will ultimately lead to achieving optimum yield and fruit quality while conserving water resources.
文摘为了进一步提高无线多跳网络的吞吐量,采用物理干扰模型,考虑链路速率可以随信干噪比(signal tointerference plus noise ratio,SINR)动态可调,提出了基于位势博弈的传输调度算法。通过设计合适的位势函数,使得纳什均衡点的存在性和收敛性都得到保证。同时,每个参与者在最小化自己支付的同时,使全局函数达到最优。仿真结果表明,该算法具有较好的吞吐量性能,而且有较快的收敛速度。
文摘嵌入式设备在调度多核多任务时,由于引入的处理器数量增多,导致调度效率低,以及能耗大等问题。基于此,提出基于实时动态电压频率调整(Dynamic voltage and frequency scaling,DVFS)的嵌入式多核多任务调度算法。构建嵌入式多核多任务能耗模型,得到不同情况下设备的能量消耗情况;建立多核多任务调度数学模型,在策略集合中找到合适的调度策略,保持时间值始终为最小;利用多核多任务调度算法机制,通过计算嵌入式设备中各个处理核的潜在负载能力,找出与预期负载最接近的处理核,并将任务分配到该任务核中,实现多核多任务的合理调度。实验结果表明,所提方法的调度效率高,且能量消耗低于3.5mW。
