Biodesulfurization of model oil using growing cells of Gordonia sp. SC-10

The biodesulfurization capacity of Gordonia sp. SC-10 in a biphasic reaction system was investigated in this study. Model oil containing dibenzothiophene was used as the sole sulfur source of bacterium. The results showed that 81.43% of the sulfur in model oil with initial sulfur content of 174?mg/l could be removed within 5?days. Gordonia sp. SC-10 had high desulfurization rate for model oils with low sulfur contents, which would reduce sulfur concentration to below 5?mg/l. Biodesulfurization process might be a potential method to obtain fuels with ultra-low sulfur contents.     

物理升华法生长ZnO晶体的研究

Zinc oxide（ZnO） has a wide band gap, high stability and a high thermal operating range that makes it a suitable material as a semiconductor for fabricating light emitting diodes（LEDs） and laser diodes, photodiodes, power diodes and other semiconductor devices. Recently, a new crystal growth for producing ZnO crystal boules was developed, which was physical vapor transport（PVT）, at temperatures exceeding 1500 ？C under a certain system pressure. ZnO crystal wafers in sizes up to 50 mm in diameter were produced. The conditions of ZnO crystal growth, growth rate and the quality of ZnO crystal were analyzed. Results from crystal growth and material characterization are presented and discussed. Our research results suggest that the novel crystal growth technique is a viable production technique for producing ZnO crystals and substrates for semiconductor device applications.     

光修复对复合材料刚度的影响

复合材料作为一种新型材料以其特有的优点已被广泛应用于航空、航天、建筑、桥梁等领域,复合材料损伤修复已成为热点研究项目.研究以常用复合材料作试件,利用近代光测技术研究了光修复技术对复合材料结构弯曲变形的影响,给出了复合材料结构修复前后刚度变化规律,为光修复技术的进一步研究和应用奠定基础.     

New and improved approaches for shared-path protection in WDM mesh networks

This paper investigates the problem of dynamic survivable lightpath provisioning in optical mesh networks employing wavelength-division multiplexing (WDM). In particular, we focus on shared-path protection because it is resource efficient due to the fact that backup paths can share wavelength links when their corresponding working paths are mutually diverse. Our main contributions are as follows. 1) First, we prove that the problem of finding an eligible pair of working and backup paths for a new lightpath request requiring shared-path protection under the current network state is NP-complete. 2) Then, we develop a heuristic, called CAFES, to compute a feasible solution with high probability. 3) Finally, we design another heuristic, called OPT, to optimize resource consumption for a given solution. The merits of our approaches are that they capture the essence of shared-path protection and approach to optimal solutions without enumerating paths. We evaluate the effectiveness of our heuristics and the results are found to be promising.     

CaPPS: cache partitioning with partial sharing for multi-core embedded systems

As the number of cores in chip multi-processor systems increases, the contention over shared last-level cache (LLC) resources increases, thus making LLC optimization critical, especially for embedded systems with strict area/energy/power constraints. We propose cache partitioning with partial sharing (CaPPS), which reduces LLC contention using cache partitioning and improves utilization with sharing configuration. Sharing configuration enables the partitions to be privately allocated to a single core, partially shared with a subset of cores, or fully shared with all cores based on the co-executing applications’ requirements. CaPPS imposes low hardware overhead and affords an extensive design space to increase optimization potential. To facilitate fast design space exploration, we develop an analytical model to quickly estimate the miss rates of all CaPPS configurations using the applications’ isolated LLC access traces to predict runtime LLC contention. Experimental results demonstrate that the analytical model estimates cache miss rates with an average error of only 0.73 % and with an average speedup of \(3505\times \) as compared to a cycle-accurate simulator. Due to CaPPS’s extensive design space, CaPPS can reduce the average LLC miss rate by as much as 25 % as compared to baseline configurations and as much as 14–17 % as compared to prior works.     

Ionic liquids in perovskite solar cells

Metal halide perovskites have gained a lot of attention par-ticularly in recent years due to their excellent optoelectronic properties and simple scalable processability[1-3].One major application of halide perovskites is solar cells,however,des-pite the power conversion efficiencies(PCEs)have already reached around 25％[4,5],the long-term stability issue of such devices still impedes their commercialization.Ionic liquids,which contain a large asymmetric organic cation and an organ-ic or inorganic anion,have recently been applied to per-ovskite solar cells(PSCs),not only increasing the efficiency but also remarkably improving the long-term stability[6,7].     

并行DSP系统消息传递软件框架

设计实现了一个可复用的面向并行DSP应用的消息传递软件框架.为了实现DSP软件的编码能够独立于不同的并行处理器体系结构, 设计分层的软件框架结构和各层中类间的关系.为了DSP应用的开发能够独立于底层的数据通信路径,提高并行系统的可扩展与可配置性,设计基于处理器间数据流模型和硬件平台拓扑模型的节点路由表结构和路由算法. 以TigerSHARC DSP构成的并行DSP系统为例,说明软件框架应用于特定的多处理器平台的方法,实现并验证了消息传递软件框架.     

一种新型单偏振片反射式液晶显示器的设计

提出一种新型单偏振片反射式液晶显示器的设计方案。采用共面转换模式并在液晶和反射板之间加入四分之一光延迟膜。通过使用参数空间表示法优化选择器件参数,获得了高反射率、低色散和宽视角的常白、常黑反射式显示模式。     

TFT液晶显示屏驱动方法的研究

详细分析了当前ＴＦＴ－ＬＣＤ驱动电路所使用的场反转、行反转和列／点反转驱动方法,说明了每种方法的优、缺点和应用的场合。     

SXGA TFT-LCD驱动电路的设计

文中详细分析了一种分辨率为ＳＸＧＡ的液晶显示器驱动电路的设计概要,介绍了其所使用的驱动方法－－三级电压驱动方法、数据驱动器和扫描驱顺的结构及其功能,对在驱顺的灰度级产生方法进行了分析,并阐述了电路中电磁干扰（ＥＭＩ）的解决方法,对接口中所应用的ＬＶＤＳ技术进行了说明。