应用型本科院校大学生综合素质评价的实证研究

为科学评判应用型本科院校大学生综合素质,采用改进三角模糊数的层次分析法对构建的大学生综合素质评价指标体系各指标进行赋权,然后利用模糊综合评判法构建一个大学生综合素质评价模型,进而运用该指标体系和评价方法进行实证研究,结果与实际情况基本一致。     

烯烃加氢工艺技术在制氢及合成氨装置上的工业应用及改进

介绍了烯烃加氢工艺的基本原理，对绝热加氢工艺、绝热循环加氢工艺和等温绝热加氢工艺这三种烯烃加氢工艺技术的主要优缺点和适用场合进行了分析，针对上述三种工艺的限制提出了流程更简单、投资较低的烯烃变温加氢新工艺。这种新工艺已在杭州炼油厂5000m^3／h的制氢装置上得到应用。     

A hybrid packet-circuit switched router for optical network on chip

The increasing number of Intellectual Property (IP) cores challenges the traditional electrical Network on Chip (NoC). Silicon nanophotonics becomes a leading technology because of offering several benefits for NoC. Also, On-chip services, including guaranteed service and best-effort service, have different traffic characteristics. This has an important influence on the performance of NoC. This paper proposes a hybrid packet-circuit switched router for optical Network on Chip (ONoC). It can support optical circuit switching (OCS) and optical packet switching (OPS) in parallel and simultaneously, in order to optimize the performance of the network with both services. According to the simulation results, the proposed architecture achieves lower latency and higher throughput than the traditional architectures in the same network scale.     

网格型胖树:一种片上光网络新结构

基于硅光技术的光片上网络具有高带宽、低能耗等优点,已成为突破片上电互连网络瓶颈的有效解决方案.基于传统Mesh和Fat Tree的优势,提出了一种新的片上光互连系统结构,设计了该结构的拓扑布局、扩展方式以及路由算法等.从时延、吞吐以及能耗等方面与现有的著名网络拓扑BFT,FT和Mesh进行比较,仿真结果表明,新结构在时延吞吐性能以及成本开销等方面具有优势.     

System-level modeling and performance evaluation of multistage optical network on chips (MONoCs)

With the number of CPU cores on a processor chip increasing rapidly, conventional electronic interconnects for core-to-core communication have run into a bottleneck. Recently, rapid development has been achieved for photonic technologies, which makes optical network on chip become an emerging solution to breakthrough electronic interconnect limitations. Multistage optical network on chips (MONoCs), by adopting multiple stages in the architecture, have great potentials to achieve the advantages of energy efficiency, high performance and scalability. To benefit from these advantages, we design a novel system-level model for MONoCs, which allows us to evaluate the performance by modeling and analyzing the latency, loss and crosstalk. The model is validated by simulation, which demonstrates that we can identify and predict some potential problems, such as latency jitter and asymmetry insertion loss distribution. Results show that our proposed model can provide insightful guidance for designing multistage optical network on chip.     

周向槽型数控铣削刀具路径的研究

针对在四轴数控铣、车削中心等机床上加工毛坯外周曲面上各种槽形，探索其刀路设计思想，得出具有2D性质的周向槽形铣削，建议用Mill模块对展开绘制的2D轮廓作挖槽刀路旋转轴取代的定义，或者直接由绘制的3D轮廓以外形铣削按展开、分次设定来获得旋转轴取代的铣槽刀路。对深浅变化的3D曲面性质的周向槽形，则必须用MasterCAM的曲面多轴加工中旋转四轴刀路来定义。     

车削中心加工调焦筒螺旋槽

分析圆筒零件周向穿壁螺旋槽铣削加工时出现的问题,并介绍从夹具结构改进到编程调试等方面实现正常加工。     

谷氨酰胺酶催化交联大米蛋白对大米淀粉理化特性的影响

为弄清谷氨酰胺酶(TG)催化交联前、后大米蛋白对大米淀粉理化特性的影响,测定淀粉的膨胀系数与溶解度、直链淀粉溢出率。采用红外光谱法、可见分光光度法、差示扫描量热仪(DSC)、快速粘度分析仪(RVA)等技术手段分析淀粉共混体系的结构特征和功能特性。结果表明,蛋白在TG酶催化下对淀粉的结构、消化率与其它功能特性均有显著影响,且大米蛋白与淀粉二者间相互作用增强,表现为:大米淀粉的膨胀系数由13.24 g/g降至最低,为7.02 g/g,其直链淀粉溢出量降低38.7%。在TG酶作用下,随着蛋白含量的增加,淀粉短程有序结构的稳定性逐渐增强。添加量为10%的蛋白在TG酶的催化下对淀粉消化性减轻效果更好。TG酶作用前、后蛋白对淀粉的热特性影响不大,而其糊化特性参数均明显下降,黏度也显著降低。TG酶催化蛋白使得淀粉颗粒网络结构更加致密且聚集。结论:TG酶催化交联蛋白对淀粉的改性效果显著。     

Production of isomalto‐oligosaccharide syrup from rice starch using an one‐step conversion method

Isomalto‐oligosaccharides (IMO) belong to a group of prebiotics that can significantly increase the number of protective gut microflora. A one‐step method using neopullulanase (NPN) in conjunction with saccharifying α‐amylase (SAA) for the bioconversion of rice starch into IMO was investigated. Purified rice starch slurry (30% w/w) was mixed with NPN (3.5 U g^?1 starch substrate) and SAA (6.5 U g^?1 starch substrate) and the slurry was incubated at 57 °C for 92 h under constant stirring. The carbohydrate composition of the resulting syrup was analysed by high performance liquid chromatography (HPLC) and the dextrose equivalent (DE) determined by titration. The amount of IMO in the syrup reached maximum (59.2%, dry basis) after 72 h of bioconversion. The concentration of glucose and maltose, which were the main carbohydrate residues of the IMO syrup, was 25.5% while the concentration of other oligosaccharide residues was about 1.0%. The results demonstrate that rice starch is a suitable matrix for producing IMO syrup and the one‐step conversion procedure appears to be an efficient method for converting starch into IMO syrup.