基于最小延时启发式搜索的TTA代码优化

针对传输触发架构下代码生成中指令调度的流水线冲突、调度死锁、资源冲突等问题,给出一种基于最小延时的遗传搜索算法模型,将软件旁路优化和资源动态分配优化整合到该模型中。实验结果表明,该算法能产生较高质量的并行代码,90%以上测试用例的指令级并行度高于表调度算法获得的结果。     

High efficiency OLEDs based on anthracene derivatives: The impact of electron donating and withdrawing group on the performance of OLED

New well-defined bulky anthracene derivatives with side groups having electron donating or withdrawing properties 8a-d were synthesized. The compounds contain substituted anthracene as the central core attaching 2-(4-(2-pyridinyl)- phenyl)vinyl and 4-R-phenyl [R: H (a), OMe (b) and CF₃ (c), N(Ph)₂ (d)] groups at 9- and 10- positions. The impact of electron donating, withdrawing and neutral groups and their influence on the molecules photophysical, charge transfer (CT), triplet transfer (TT) and triplet–triplet annihilation (TTA) properties has been investigated. Based on the photophysical studies the most promising molecule (8d) has been selected and high efficiency fluorescent OLEDs with EQE at very low current efficiency reaching 7% were obtained. The value at low current density implies a Triplet Fusion (TF) contribution of 45%, very close to the maximum theoretical value of 50% when only the singlet decay channel is open to TTA, however we believe that in this case both TTA and TADF contribute to the triplet harvesting to yield high EQE values, and this mixed triplet harvesting arises through the heterogeneity of the films. At high current density a brightness of 20000 cd/m² was achieved and it is assigned partially to the material crystallisation.     

Eu(TTA)3·phen三元配合物薄膜的制备和表征

合成了三元配合物 Eu( TTA) 3· phen,并采用化学改性 sol- gel提拉法制备了 Eu( TTA) 3· phen薄膜 ,对薄膜的各种性能进行了详细研究 ,并用光声光谱确定了 Eu( TTA) 3·phen薄膜的光学透明区间     

TTA结构数字信号协处理器数据Cache的设计与实现

论文分析了面向多媒体应用的TTA(TransportTriggeredArchitecture)微处理器的特点和访存要求,提出并设计实现了应用于此款微处理器、采用直接映象规则、写回和按写分配策略的4KB数据Cache,并在全系统环境下对其进行了模拟验证。实验结果说明数据Cache系统在降低命中时间和提高命中率两方面做到了良好的折中,命中时间与芯片流水线处理周期匹配,有效保证了全系统性能的发挥。     

面向TTA结构的可重定向周期精确模拟器的设计与实现

给出了一种面向传输触发体系结构的可重定向周期精确模拟器的设计与实现。该模拟器能够在不修改的情况下，对不同的TTA硬件体系结构设计进行高效的模拟。同时提供了方便的用户自定义扩展指令的添加接口。为了加快模拟速度，提出了一种预解释模拟机制。     

Supercritical direct extraction of neodymium using TTA and TBP

Extraction of a metal ion from its oxide using ligand assisted supercritical carbon dioxide (SC CO₂) comprises namely ionisation of metal oxide, in-situ chelation of metal cation with the ligand to form metal chelate/adduct and subsequently its extraction. Understanding of the mass transfer of chelate/adduct is very important in deciding the overall performance of the in-situ supercritical fluid extraction (ISCFE) process. For the present study neodymium (Nd) is selected as a model metal ion for its extraction from oxide using a mixed ligand system containing thenoyl tri-fluoroacetone (TTA) and tri-butylphosphate (TBP). Extraction studies have been performed at 35 MPa and 60°C for the prepared Nd-TTA-TBP adduct as well as for neodymium oxide (Nd₂O₃). The rate of dissolution starting from oxide and TTA-TBP adduct of Nd have been calculated and compared with the equilibrium values based on dissolution studies at the same conditions of temperature and pressure. During the extraction starting from oxide, the ligands TTA and TBP are also co-extracted with the adduct as these are highly soluble in SC CO₂. Mass transfer coefficient has also been estimated for the steady state during the dynamic extraction. It is observed that the rate of extraction and mass transfer coefficient increase with flow rate of SC CO₂.     

石墨炉原子吸收光谱法测定奶粉中的六价铬

基于Cr(Ⅲ)与噻吩甲酰三氟丙酮(TTA)生成的络合物在石墨炉中的挥发性,建立一种前处理简单、灵敏度高的测定奶粉中六价铬的分析方法。对样品的消化方式、Cr(Ⅲ)与TTA络合的酸度、试剂的加入量、超声波水浴的温度和时间、静置时间与石墨炉挥发Cr(Ⅲ)的原子化条件进行探讨。结果表明,Cr(Ⅵ)在0.002~0.010mg·L-1浓度内呈良好线性关系(r=0.9995)。奶粉样品中Cr(Ⅵ)不同加入量的平均回收率为78%~93%,其相对标准偏差为3.8%~9.4%,检出限为0.4 mg·L-1。方法具有分析速度快、灵敏度高、干扰少、操作简便等特点,应用于奶粉中六价铬的测定获得了满意的结果。     

Encapsulation of Eu(TTA)3 into MCM-41 Mesoporous Molecular Sieve by Sol-Gel Method

Ｔｈｅｄｅｓｉｒａｂｌｅｌｕｍｉｎｅｓｃｅｎｃｅｃｈａｒａｃｔｅｒｉｓ ｔｉｃｓｏｆｓｏｍｅｌａｎｔｈａｎｉｄｅｉｏｎｓｂａｓｅｄｏｎｔｈｅｉｎｔｒａ ｆ ｏｒｂｉｔａｌｔｒａｎｓｉｔｉｏｎｓｈａｖｅｒｅｃｅｉｖｅｄｍｕｃｈａｔｔｅｎ ｔｉｏｎ.Ｒａｒｅｅａｒｔｈｃｏｍｐｌｅｘｅｓ,ｅｓｐｅｃｉａｌｌｙｔｈｏｓｅｃｏｎｔａｉｎｉｎｇＥｕ3 ａｎｄＴｂ3 ,ｏｆｔｅｎｅｘｈｉｂｉｔｇｏｏｄｌｕｍｉｎｅｓｃｅｎｃｅｏｗｉｎｇｔｏｔｈｅｓｔｒｏｎｇａｂｓｏｒｐｔｉｏｎｏｆｔｈｅｏｒｇａｎｉｃｌｉｇａｎｄｓａｎｄ…     

领域内可重构功能单元自动生成方法

特殊功能单元可以有效加速处理器性能，然而由于其专用性，能够加速的应用有限。领域内可重构功能单元提供领域内的灵活性与高效性。文章提出针对特定应用领域生成可重构能单元的方法，该方法基于多个表达式自动生成高效的可重构功能单元。选取传输触发体系结构作为平台，在密码领域中三类算法的应用验证了该方法的有效性。     

HNO3介质中Np价态测定过程中稳定性的研究

用ＴＴＡ和ＴＯＰＯ作萃取剂，测定了１ｍｏｌ／ＬＨＮＯ３中Ｎｐ（Ⅳ）、Ｎｐ（Ⅴ）、Ｎｐ（Ⅵ）的分配比；研究了不同稳定剂对Ｎｐ混合价态的作用及Ｎｐ（Ⅵ）在ＴＴＡ萃取过程中对Ｎｐ（Ⅴ）－Ｎｐ（Ⅵ）价态稳定性和测定结果的影响。