COMPARATIVE STUDY OF CHEMICAL COMPOSITION AND PHYSICOCHEMICAL PROPERTIES OF DEFATTED WHEAT GERM FLOUR AND ITS PROTEIN ISOLATE

Chemical composition and physicochemical properties of defatted wheat germ (WG) flour (DWGF) and protein isolate (DWGPI) were evaluated to determine their potential as food ingredients. Protein content of DWGF was 31.42% while that of DWGPI was 84.18%. Comparison of the amino acid composition to the Food and Agriculture Organization/World Health Organization reference pattern indicated that DWGF and DWGPI had well‐balanced amino acid profiles. Both of them were relatively rich in lysine, whereas cystine was lacking. The main mineral constituents of DWGF were potassium, magnesium and calcium, while sodium was the dominating element in DWGPI as a result of salt extraction. Concentrations of potassium, magnesium, calcium, manganese and zinc in DWGPI were significantly decreased because of alkaline extraction compared to those in DWGF. The elements copper and iron were higher in DWGPI than in DWGF. Total flavonoid content of DWGF was about 0.35 g rutin equiv/100 g, whereas that of DWGPI was lower (about 0.24 g rutin equiv/100 g). Compared to soybean protein isolate, DWGPI was easily digested by pepsin in vitro, while DWGF was comparatively indigestible. Nonreduced and reduced sodium dodecyl sulfate‐polyacrylamide gel electrophoresis analyses seem to show that interpolypeptide S‐S bonds were absent in the structure of WG proteins. DWGF and DWGPI shared four groups of bands: (1) 85–70 kDa; (2) 55–50 kDa; (3) 47–40 kDa; and (4) below 20 kDa.     

数字振荡器的实现原理与仿真编程

鉴于数字信号处理中的实时应用问题，探讨了数字滤波器的实时实现原理，包括离散时间网络结构的作用和离散时间信号处理的特点，重点介绍了实时应用中实现数字滤波器的基本思想，运用MATLAB和所导出的通用数字振荡器的系统函数对一个非正弦数字振荡器进行了仿真编程，还讨论了有关实时处理的几个重要的系统性质，表达了作者对于当前学习和应用数字信号处理方法的观点。     

基于产业集群的煤炭循环经济发展模式

山西省是能源大省，粗放的经济增长方式导致了资源浪费、枯竭和环境污染。煤炭城市的可持续发展是我们迫切需要解决的问题。集群战略是目前普遍认可的提升产业和区域竞争力的有效途径，循环经济工业园区与产业集群有相似之处，是资源型城市可持续发展的重要模式。文章通过对我省资源形势的分析，提出山西省基于产业集群的循环经济发展模式。     

Turbo乘积码对星间光通信链路的性能改善分析

通过联合界技术较为详细地给出了Turbo乘积码的最大似然译码限,并比较了在星间光通信链路中Turbo乘积码和Turbo卷积码及传统级联码的纠错性能.研究表明,Turbo乘积码的纠错性能优于传统级联码以及Turbo卷积码.     

Development of DPSSL and Its Applications

1 Introduction Since the world first laser successfully developed by Maiman [1] in 1960, the research activities in this field has never been stopped. With diode laser pumping, it is possible to built higher efficiency, and therefore simpler and more compact laser in an all solid- state device. With recent progress in the development of reliable higher power diode lasers, parallel improvements in diode - pumped solid - state lasers have been made. Diode laser- pumped solid- lasers also offer …     

雷达导引头信号检测功能仿真通用模型设计

依据雷达距离方程和奈曼-皮尔逊检测准则，采用蒙特卡罗仿真法，建立了雷达导引头信号检测功能仿真通用模型。模型采用模块化设计，主要包含目标回波模块、噪声模块、杂波模块、干扰模块、检测概率模块、检测确认模块、作用距离模块和烧穿距离模块等，实现对多种体制雷达导引头的信号检测性能进行理论计算和功能仿真，为雷达导引头的总体设计提供了一个通用方便的分析工具。     

一种使用开路并联线的改进型螺旋微带谐振单元

提出了一种改进型螺旋微带谐振单元(SCMRC)的结构.该改进型螺旋微带谐振单元具有微带并联开路线,在低频通带内通过设计达到50Ω的端口阻抗.同时,并联的微带开路线在SCMRC结构的禁带中谐振,来实现更强的慢波效应和更宽的禁带.实际设计、制作和测试了该改进型螺旋微带谐振单元,该滤波器在低频通带内具有低插入损耗、改善的回波损耗,以及在较小面积下的宽禁带.     

Disposal of Waste Plastics With Traditional Coking Process

A new technology for treating waste plastics （WP） by traditional coking process was introduced. With a thermo-balance and a 10 g atmospheric fixed bed reactor, the thermo-gravimetric behavior and product were studied during co-coking of WP with blended coal. And then, using a coke-oven with capacity of 200 kg, the characteristics of products were assessed. The results showed that there is an overlapping temperature range （200-550℃ ） of decomposition between WP and blended coal, and the pyrolysis synergism index η and synergism strength β proposed could evaluate the synergism between them. 1% of added WP results in the maximum synergism in all series experiments. The increase of added WP decreases the synergism. Tar yield in co-coking is increased with the decrease of water yield for synergism. Moreover, it was also found that the quality indexes of coke, such as M10, M40, CRI and CSR, are degraded with the increase of WP until 4%, though the quality of tar and gas is optimized for WP addition.     

文昌13-1油田含水上升机理研究及挖潜措施

文昌13-1油田综合含水已达60%,采油速度相对开采初期明显下降。为了保持油田合理的采油速度,提高经济年限内的最终采收率,对文昌13-1油田含水上升机理进行了研究,并提出了治理措施。研究结果表明,构造因素、储层非均质性和采液强度是影响油井含水上升及开发效果的本质因素。针对海洋石油开采的特殊情况,以文昌13-1油田为例,研究了不同类型储层的含水上升规律,提出了卡层、提液、酸化解堵、堵水等降水稳油的挖潜措施。现场应用表明,挖潜效果良好,有效地延缓了油田含水的上升速度,为实现油田的均衡开采提供借鉴。     

内陆核电站低放射性废水排放的三维计算

本研究应用EFDC三维水动力学数学模型,对典型受纳水体富水水库中核电站的低放射性废水排放进行了数值计算。富水水库库容较大、水体较深、水面窄长。先对由排放引起的水库内浓度场的稳定过程和稳定时间进行了预备计算,之后对表层排放、底层排放两种不同的排放方案进行了计算与分析,给出了表、底层排放核素分布的三维结构。模拟结果表明:污染物在环境水域中的运动规律,主要由环境流场决定。水库水深大,水体的稀释能力较强,且有向流速大的水层输移的趋势;不同半衰期物质,其浓度分布因水流输运作用与自衰作用的影响程度不一,同样条件下,半衰期长的核素浓度线包络面积也较大。