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14271.全球天然气存储市场报告（2015-2019年）
[电力、热力、燃气及水生产和供应业] [2015-04-12]
Natural gas storage involves the accumulation of natural gas in storage facilities for future consumption. The purpose of storage is to meet the fluctuating energy demand during peak and off-peak seasons. Generally, natural gas is stored during the off-peak season and utilized during the peak season. This reduces the demand and supply gap and increases the reliability of supply.
关键词：天然气；储存；未来储存设施；积累消耗
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14272.全球浮动液化天然气市场报告（2015-2019年）
[石油加工、炼焦和核燃料加工业,电力、热力、燃气及水生产和供应业] [2015-04-11]
Floating LNG refers to a system in which a set of operations and processes are performed for the development of offshore-based natural gas reserves. These systems are mainly used for the production, liquefaction, storage, and transfer of LNG from offshore gas reserves to onshore areas. The floating LNG facility produces LNG directly on the offshore floating system, where it undergoes different processes, is stored in vessels or tanks, and is finally transported to the land. The entire value chain of the floating LNG system is shorter than that of the common onshore LNG system. All the equipment, facilities, and other processes in a floating system take place in a single enclosed structure thereby using just one-third of the space required by a normal LNG system. The use of floating LNG systems eliminates the need for long distance pipelines and onshore infrastructure and therefore ultimately reduces the disturbance to the surrounding environment and minimizes the development costs to a large extent.
关键词：浮动液化天然气；海洋；天然气储量；生产；液化；储存；海上漂浮
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14273.北美燃料电池市场报告（2015-2019年）
[化学原料和化学制品制造业,计算机、通信和其他电子设备制造业,电力、热力、燃气及水生产和供应业] [2015-04-11]
A fuel cell converts chemical energy into electrical energy through an electromechanical reaction. A typical fuel cell consists of two electrodes, the anode and the cathode, which react to generate electricity. While liquid electrolytes carry electrically charged elements from one electrode to another, a catalyst is required to speed up the chemical reaction inside the fuel cell. Methanol, biogas, hydrogen, natural gas, and hydrocarbons are various fuels that can be used in fuel cells. Fuel cells generate less pollution as hydrogen combines with oxygen to form water, a harmless by-product. Reduced pollution is one of the major factors driving the growth of the Fuel Cell market in North America.
关键词：燃料电池；机电；化学能；转化；电能；液体电解质
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14274.全球非常规天然气市场报告（2015-2019年）
[采矿业,电力、热力、燃气及水生产和供应业] [2015-04-11]
Unconventional gas is a natural resource found trapped in coal beds, shale blocks, and tight sands. These gas resources are different from conventional energy in terms of reservoirs, geographical areas, and accumulations of natural gas. Different techniques are applied to extract unconventional gas depending on the field and type of gas to be extracted. A common method is hydraulic fracturing, where a hole is drilled into the rock and large amounts of water are injected at high pressure along with sand and other chemicals to create cracks in the rock. The cracks, when opened, will free the trapped gas allowing it to flow to the wellhead. The three types of unconventional gases are listed in the exhibit below.
关键词：非常规天然气；煤层；自然资源；页岩区块；传统能源；然气的积聚
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14275.印度电力电容器市场报告（2015-2019年）
[电气机械和器材制造业,电力、热力、燃气及水生产和供应业] [2015-04-10]
A power capacitor is an electrical device used to improve the power factor of the electrical power system that operates in an inductive load. Many industries use induction motors that induce a low power factor in the adjacent distribution line, which leads to massive Kvar loss. It has a negative impact on the usage of energy. Improvement in power is an important factor for conserving energy. Power capacitors that are connected to a transmission line improve the overall power factor of end-user industries. Though it has limited usage, capacitors are sometimes used to store energy.
关键词：功率电容器；改善；功率因数；电气装置；电力系统；存储能量
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14276.许家崖水库溢洪道消能防冲方案模型试验研究
[电力、热力、燃气及水生产和供应业] [2015-04-07]
许家崖水库溢洪道中的水流为低弗劳德数水流，消能不充分是这类工程布置中的普遍问题。此外，溢洪道进口后方的弯道一定程度上恶化了溢洪道中的流态。为了得出更为合理的布置及消能防冲方案，通过模型试验的方法，从底流消能和挑流消能两个方面，分别对原设计方案进行优化，在各种优化方案的基础上对比了单级消力池消能方式、两级消力池消能方式和挑流消能方式之间的水流流态和消能效果，最终推荐挑流消能方式为工程较为经济合理的消能形式。
关键词：工程水力学；溢洪道；模型试验；底流消能；两级消力池；挑流消能
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14277.全球变压器监测方案市场报告（2015-2019年）
[仪器仪表制造业,电气机械和器材制造业,电力、热力、燃气及水生产和供应业] [2015-04-07]
Transformer monitoring solutions are used to monitor and diagnose the health of a transformer. A monitoring solution helps end-users detect and identify failures in transformers in due time, reducing the repairing costs. A transformer monitoring solution is an integration of sensors, data management and analysis, and software application. It collects data from the sensors, and turns them into meaningful information for required action. The Utilities, Industrial, and Commercial sectors are the major end-users of these solutions.
关键词：变压器；监控；解决方案；监视和诊断；变压器；变压器故障；传感器
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14278.全球液压泵市场报告（2015-2019年）
[电气机械和器材制造业,电力、热力、燃气及水生产和供应业,仪器仪表制造业] [2015-04-07]
Hydraulic pumps are mechanical devices that convert mechanical energy into hydraulic or hydrostatic energy. They operate on the displacement principle, wherein a vacuum is created at the pump outlet, inducing a force which drives the liquid from the reservoir into the inlet line. With the aid of further mechanical action, the liquid is transferred to the outlet and eventually into the hydraulic system. These systems are used in hydraulic drive systems, which can either be hydrostatic or hydrodynamic. A hydraulic machine, together with a pump, performs tasks such as lifting, lowering, closing, opening, or rotating components. It is a source of power for dynamic machines and equipment.
关键词：液压泵；机械能；转换；液压；机械装置；静液压；能量；液压系统
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14279.基于分数进制小波变换与支持向量机
[电力、热力、燃气及水生产和供应业] [2015-04-06]
本文探讨了一种基于分数进制小波变换与支持向量机（SVM）的短期风速预测模型。首先探讨了通过小波变换提取风速序列振荡特征提高传统模型预测精度的思路，进而分析了分数进制小波变换通过品质因子可调的变换模式实现的较传统小波变换更为自由精细的时频局部性能，以及在振荡信号特征提取领域的优越性；之后探讨了基于分数进制小波变换时频分解与SVM 预测的风速预测模型的构建流程；实验结果表明，该模型与基于传统小波变换与SVM 的预测模型以及神经网络、SVM 模型相比，能够有效的提高预测精度。
关键词：风速预测；多步预测；分数进制小波变换；支持向量机
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14280.基于高阶线性矩法的洪水设计值研究
[电力、热力、燃气及水生产和供应业] [2015-04-06]
为了提高大重现期洪水设计值计算精度，研究高阶线性矩法在洪水频率分析计算中的应用。应用蒙特卡洛试验研究不同阶线性矩的统计特性和对设计值的影响。以陕西省5 个测站年最大洪峰流量序列为例，进行广义极值分布高阶线性矩的参数估计，评价拟合效果和设计值的计算偏差。结果表明，高阶线性矩法具有良好的统计特性；与普通线性矩法比较，高阶线性矩法能更好拟合洪水序列的大洪水值，且设计值估计偏差小。因此，高阶线性矩法是一种合理可行的参数估计方法，以期为大重现期设计洪水值的计算提供依据。
关键词：水文学；参数估计；洪水设计值；高阶线性矩；广义极值分布
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