摘要：提出基于MOEA/D和模糊集理论相结合的优化方法,解决双输入航空静止变流器热设计过程中多变量多目标的寻优问题。分析功率器件的传热路径并构建等效热路,以功率器件结温、散热器质量、散热器成本为优化目标,以散热器的结构参数为设计变量,基于MOEA/D开展热优化。本文进行了比较研究,结果表明所提出的算法不仅能够满足多目标权重的不同要求,且快速性和鲁棒性好。

摘要：高能效(Energy efficiency)已成为目前嵌入式多核片上系统(System-on-Chips,SoCs)设计中的首要优化目标.基于电压/频率岛设计的三维多核片上系统能够为构建高能效系统提供一种有力的解决方案.然而,不断增加的工艺偏差导致制造后芯片中电压/频率岛的性能参数偏离其额定值.在较大偏差的影响下,可能无法满足任务的截止时间约束.另外,已有的研究工作大多针对二维平台,无法很好地解决因三维集成而不断恶化的发热问题.面向采用电压/频率岛设计的三维多核SoC,文中提出一个硅后优化框架,在最小化系统能耗的同时,能够满足任务截止时间和系统热约束.除了能效感知的任务调度和电压/频率分派方法,提出的优化框架还采用任务迁移平衡核栈的功耗以实现热优化.实验结果表明,与已有的热平衡方法比较,文中提出的方法能减少平均18.6%的能耗.同时,与经典的能耗优化方法比较,文中提出的方法能降低平均5.6℃的峰值温度.

摘要：针对容错技术带来的超负荷、过热等问题,在兼顾热优化的前提下,提出利用冗余链路代替故障链路实现容错功能,把原硅通孔(TSV)的信号轮流绕行到空闲冗余通道的设计。这种方式可以有效的减少了热不均衡问题,降低了原通道上的通信量。且在通信量越大的通道中越明显,同时提高冗余配置比可以改善热优化效果。当冗余配置比为64∶8,通信量为16Mbit/s时,所有原TSV链路的温度相对于无优化时均有降低约4.8%,当冗余配置比为64∶16,通信量为64Mbit/s时,降低了约15.7%。

摘要：对管内对流换热过程的温差换热和粘性摩擦引起的熵产进行了分析和优化计算 ,对换热设备和传热技术的设计和优化组织具有一定的指导意义。

摘要：阐述了目前机床结构热变形控制的主要对策：热优化、热温控、热补偿研究现状。以某重型数控落地铣镗床为例，进行结构改进设计和温度控制。现场考核表明，新机床的热态精度得到明显的提高。

摘要：Entransy has been applied and studied in a broad range of heat transfer optimizations recently. Current study proposes the entransy of evaporators to conduct the optimization of heat exchangers in heating, ventilation, air conditioning and refrigeration systems. A novel finless bare tube heat exchanger was studied using a validated heat exchanger modeling tool. The capacity based optimization and entransy dissipation based thermal resistance were used and compared. The applicability of using entransy dissipation based thermal resistance in this type of heat exchanger optimization has been discussed. It has been demonstrated that minimizing entransy dissipation and maximizing capacity are equivalent to optimizing evaporators with fixed flow rates and different when optimizing evaporators with variable flow rates and the deviation is negligible when heat exchanger capacity is small(~1 k W) and more obvious as heat exchanger capacity increases. Thus entransy dissipation based thermal resistance could be used as an alternative optimization index to capacity for evaporators with fixed flow rate and small capacity evaporators with variable flow rates and should be used individually with capacity as an optimization index for evaporators with large capacity and variable flow rates.

摘要：Diamond Lux系列热流道是专为PC应用面设计的。通过对系统热优化难题的攻克，以及对加热丝、喷嘴和内部流道等部件的技术改进，该系统能够使工艺控制更加精准。