关于混联梯级水电站经济调度的研究

提出采用具有附加线性约束的网络规划法，可把混联梯级水电站分解为几个子网络，简化了每个子网络的求解计算，从而加速大电网复杂的经济调度的计算速度。     

复电阻率测井方法及其应用

复电阻率测井是以两频或多频测量地层电阻率的新方法 ,它可用来有效地识别油气层和确定水淹油层的水淹程度。简要介绍了复电阻率测井的测量原理、仪器设计。胜利油田 9口井的现场测井资料初步验证了该方法的可行性和有效性     

Properties of Edible Films from Total Milk Protein

The mechanical properties and water vapor permeability of edible films made from various total milk proteins (TMPs) were investigated. Two TMPs obtained from nonfat dry milk (NDM) by removing lactose and three TMPs obtained from a commercial source were studied. Lactose was extracted from NDM by ultrafiltration or suspension in ethanol followed by filtration. TMP concentrate obtained by ultrafiltration (UF) produced films with the lowest water vapor permeability (WVP) and the highest tensile strength at break. Commercial TMP concentrates produced films more ductile than those from the UF-TMP or retentate from ethanol extraction. Further research is needed to improve mechanical properties of UF-TMP films without increasing the WVP.     

天线方向图的复射线仿真

根据复射线理论，利用复源点高斯波束场来模拟天线的远场方向图。本文提出三种模拟方法，即主瓣匹配法，峰值匹配法和逐点匹配法，给出了多种方向图的仿真结果。数值分析和优化结果表明，复射线峰值匹配法是一种精确实用的天线方向图仿真技术。     

Evidence for biotic control of Australian reservoir phytoplankton communities and the potential for applied biomanipulation

Although some concerns have been expressed with respect to the applicability of biomanipulation to Australian reservoirs and other inland waters, no major obstacles were found in this review. The previous doubts stimulated research, which has provided evidence for unexpected mechanisms of food web interactions, such as positive effects of small copepods on planktonic algae, higher than usual grazing potential of cladoceran communities, and direct positive effects of planktivores on phytoplankton. Further research into zooplankton-cyanobacteria interactions should indicate how widespread is the previously reported ability of some southern hemisphere crustaceans to benefit at a population level from feeding on cyanobacteria. Quantitative fisheries acoustics, which has not been widely used in biomanipulation trials before, is a promising new tool in the assessment of the biomass of planktivorous fish in the pelagic zone of reservoirs.     

交联型聚醚聚氨酯的表征、力学性能及其碱金属盐络合物的导电性能

采用三羟甲基丙烷（ＴＭＰ）作交联剂与聚乙二醇（ＰＥＯ－１５４０）和甲苯二异氰酸酯（ＴＤＩ）反应，得到了具有较好力学性能的交联型聚醚聚氨酯（ＰＥＵ），该聚合物与ＬｉＣｌＯ４的结合物具有较高的室温电导率（σ３０℃＝１．８７×１０￣（－４）Ｓ／ｃｍ）。采用全反射红外光谱（ＡＴＲ－ＩＲ）对聚合物的结构进行了表征。对聚合物的组成、不同ＴＤＩ类型及络合盐浓度对聚合物力学性能及其络合物电导率的影响进行了探讨。低度交联聚合物的络合物，其电导率与温度的关系符合建立在自由体积理论上的ＶＴＦ方程，表明络合物中离子的传导主要是在无定形区域进行，与自由体积有关。     

Mashing of rice with barley malt under non-conventional process conditions for use in food processes

Non-conventional mashing conditions are relevant in the development of a lactic acid-fermented soymilk beverage where mashed rice is the source of carbohydrates for the fermentation and sweetness of the beverage. Advantages in the process layout could be achieved by mashing at higher pH and lower malt concentrations than normally used in the brewing industry. the work reported here assessed the consequences of mashing under non-conventional conditions. Malt concentration in the cereal part was varied from 25% to 70% (w/w), pH was varied within 5.3 to 7.1, and prolongation of the holding times at 50°C and 62°C was investigated. Regression equations have been established for predicting yields of soluble protein, low molecular weight sugars and total fermentability as functions of pH and malt concentration. the results showed that the maltose yield was constant while glucose, maltotriose and total fermentable sugar yields decreased slightly with increasing pH and decreasing malt concentration. Prolonged mash holding times at 50°C and 62°C gave minor increases in protein yields only. It is concluded that it is quite acceptable to use non-conventional mashing conditions when a mashing step is integrated in other food processes.     

绿豆纤维功能饮料的工艺研究

探讨了新型保健绿豆纤维功能饮料的生产工艺,对影响产品品质的几个主要因素进行了较为深入的探讨,提出了生产绿豆纤维功能饮料的最佳工艺条件。     

固载于SBA-15分子筛中的同双核金属配合物催化剂

合成了3种同双核金属配合物[M2LCl3]Cl(L代表配体三亚乙基四胺,M代表Co,Cu,Cr),采用微波加热法合成了SBA-15分子筛,采用浸渍法将3种同双核金属配合物分别固载在表面官能化的SBA-15分子筛(SBA-15-NH2分子筛)中制得负载型催化剂。傅里叶变换红外光谱、X射线衍射、紫外可见光谱和热分析表征结果表明,同双核金属配合物被固载后,其结构仍保持完整。以环己烷氧化反应为探针反应,考察了[Co2LCl3]Cl/SBA-15-NH2,[Cu2LCl3]Cl/SBA-15-NH2,[Cr2LCl3]Cl/SBA-15-NH2催化剂的活性,环己烷转化率分别为11.0%,49.5%,57.9%;对于[Cr2LCl3]Cl/SBA-15-NH2催化剂,当分别以乙睛、丙酮和冰醋酸为溶剂时,环己烷转化率分别为57.9%,52.1%,34.2%,3次重复实验的环己烷转化率分别为57.9%,47.8%,46.5%,表明该催化剂具有较好的活性和重复使用性。     

High‐pressure processing effects on the mechanical,barrier and mass transfer properties of food packaging flexible structures: a critical review

Food products can be high‐pressure processed (HPP) either in bulk or prepackaged in flexible or semi‐rigid packaging materials. In the latter case the packaging material is subjected, together with the food, to high‐pressure treatment. A number of studies have been performed to quantify the effects of high‐pressure processing on the physical and barrier properties of the packaging material, since the integrity of the package during and after processing is of paramount importance to the safety and quality of the food product. This article reviews the results of published research concerning the effect of HPP on packaging materials. Copyright © 2004 John Wiley & Sons, Ltd.