底排弹测试现状及展望

本文在对底排弹测试技术现状调查和分析的基础上,概括出了底排弹测试的两个基本层次,总结了底排弹测试的各种方法,指出了各种测试方法的优缺点。针对现行测试方法在动态领域的不足,探讨性地提出了动态存储测试方法。     

A storage heat pump using an ‘ozone-friendly’ refrigerant

The paper describes the integration of a chemical and a vapour-compression heat pump for energy storage applications. The vapour-compression system is designed to operate using the UK cheap rate ‘Economy 7’ electricity tariff. The system is characterized thermodynamically using various refrigerant/absorbent pairs in the chemical storage circuit and an ozone-friendly refrigerant, R134a, in the vapour-compression circuit. Results indicate that the H₂O/Na₂S pair provides a high energy storage density and is the most suitable for use in this system. The paper also describes the design features of a domestic-sized version of this heat pump system. Air in the sunspace (conservatory) of a house was used as a heat source for the heat pump.     

塑钢包装箱材料贮存寿命预测

用热老化箱对4种塑钢包装箱用材进行了为期1个月的热老化试验，以材料的冲击强度作为判据指标，通过回归处理外推得到其常温下的贮存寿命预测评估结果。     

Simulation of Temperature Distribution in Stored Wheat without Aeration

A neural-deterministic simulation model applied for calculating distributions of temperatures and moisture content in a bed of wheat stored in a steel silo without aeration is presented in the article. The model consists of differential equations of heat and moisture transfer, initial and boundary conditions, and three artificial neural networks used during simulated ambient air conditions. Experiments and computer simulations were carried out in order to determine temperature fields in wheat grain stored in a steel silo for two months. The computer simulations were carried using MATLAB and FEMLAB software. The difference between measured and simulated temperature in grain near the silo wall at a height of 2.5 m from the bottom was less than 3.0°C. On the basis of the analysis performed it was concluded that the temperature distributions obtained with the model were consistent with the measured results obtained for grain stored in a steel silo without aeration.     

宁波溪口抽水蓄能电站下库面板堆石坝观测资料分析

溪口蓄能电站下库面板堆石坝最大坝高44.5m,施工期间布置的原型观测项目有坝体内部沉降和水平位移、周边缝和板间缝位移、面板应变以及坝基孔隙水压力。根据观测仪器自埋设至2000年的观测资料,文中分析了各项观测物理量的变化规律和变化趋势,综合评价了大坝的工作性态。     

网络存储的发展历程及新兴的iSCSI

目前SAN和NAS存储正在迅速发展，DAS的生存空间越来越小。今天超过1／3的存储是网络化的，如果不是因为FC的高成本和复杂性．这个数字还会更大。iSCSI是IETF一种新的标准协议．它将SCSI命令压缩到TCP／IP包．使数据块在IP网络上传播。和FC-SAN相比．高速千兆iSCSI耙SCSI、以太网和TCP／IP结合起来，具有许多优势．如建立在稳定和熟悉的标准上；较低的总拥有成本，安装和维修费用很低；较高程度的可操作性，减少了异构网络和电缆．使用一般的以太网交换机而不是特殊的FC交换机；等等。     

Storage effects on nutritional quality of commonly consumed cereals

Storage effects on nutritional quality of commonly consumed cereal grains are studied. Freshly harvested wheat, maize and rice grains were stored at 10, 25 and 45 °C for six months. A significant decrease in pH and an increase in titratable acidity was observed during storage of these three cereal grains at 25 and 45 °C. A gradual decline in moisture, total available lysine and thiamine contents was observed during storage. Total available lysine contents decreased by 6.50% and 18.5% in wheat, 14.3% and 20.7% in maize and 23.7% and 34.2% in rice during six months of storage at 25 and 45 °C, respectively. Six month’s storage of rice, maize and wheat grains at 25 and 45 °C resulted in reduction of thiamine contents by 16.7% and 29.2%, 17.2% and 24.1% and 21.4% and 29.5%, respectively. About 36.4–44.4% decrease in total soluble sugars at 45 °C and 9.30–31.8% increase in total soluble sugars were observed at 10 and 25 °C during six months storage of these cereal grains. Protein and starch digestibilities of cereal grains also deceased during six months of storage at 25 and 45 °C. No significant change in nutritional quality was observed during storage of cereal grains at 10 °C.     

基于千兆以太网的非编网解决方案

由于在价格和兼容性上千兆以太网比FC网有明显的优势，随着计算机网络及终端技术的发展、采用千兆以太网架构非线性编辑网络正成为一种趋势。本文主要分析了采用NAS和IP SAN架构非编网络的解决方案。     

Effect of the absence of lipoxygenase isoenzymes on the storage characteristics of rice grains

Three varieties of paddy rice with and three varieties without lipoxygenase (LOX) isoenzymes were stored at room temperature, in dark conditions for 42 months. Insect damage and viability were investigated during that time. Varieties without LOX-1,2 and their offspring were screened with a rapid method of estimating LOX isoenzymes, and subjected to an accelerated-ageing experiment. The results indicated that in varieties without LOX-1,2, after long storage, rice quality was normal, but for varieties with LOX-1,2, rice quality deteriorated. With increase of storage time, the germination rate of the seed of most varieties decreased greatly except for varieties without LOX-1,2 where there was almost no change in the germination rate. In varieties without LOX-1,2 and their offspring, after an accelerated ageing experiment the germination rate of some varieties changed slowly, but with others, the germination rate changed quickly. This indicated that a definitive factor, which influenced the life of seeds, may be the loss of LOX-1,2. During storage, there was also a significant difference in the degree of insect damage. In varieties without LOX-3 insect damage was lower, but in varieties with LOX-3 insect damage was higher. Therefore, the absence of LOX-3 may be very important in insect resistance in rice grain.     

基于S2A6000存储的新闻制播网络安全设计

从分析S2A6000新闻制播网系统特点,拓扑结构入手,完整总结了S2A6000存储的新闻制播网络安全设计与安全措施。