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14311.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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14312.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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14313.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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14314.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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14315.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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14316.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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14317.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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14318.小浪底水库拦沙期黄河引水
[电力、热力、燃气及水生产和供应业] [2015-04-06]
影响河道泥沙输移效率的因素众多，如水沙协调性、泥沙组成、引水规模、河道形态等。引水对河道泥沙输移会造成增淤或减淤，其增减淤量随水沙条件、分流比、河道边界等因素而变化，本文从黄河泥沙输移规律出发，探讨了不同水沙和冲淤条件下，引水规模对黄河冲积性河道泥沙冲淤调整的影响，量化了增（减）淤判数与分流比、泥沙输移比之间的关系。成果对黄河引水方案的科学制定及引水工程的运行调度具有参考价值。
关键词：河流泥沙动力学；分流比；泥沙输移比；增（减）淤；增淤判数
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14319.基于离散小波变换与模糊神经算法的河口日水位预测
[电力、热力、燃气及水生产和供应业] [2015-04-06]
为了对受特殊复杂环境因子干扰的河口日水位中长期动态实现有效预测，将离散小波变换（DWT）和模糊神经（NF）算法结合，构建长江河口日水位中长期动态的联合预测模型DWT-NF。引入DWT 方法对原始水位信号序列进行分解和减噪，筛选出最优DWT 分解因子组合TD（D3+D4+D8）序列作为预测模型的输入。引入NF 算法构建水位预测子模型，从滞后1~5 天的TD 序列中筛选出最优输入组合，确定河口日水位预测的最优DWT-NF 模型结构，其中三条港水位预测的最优联合模型结构以滞后1~3 天的TD 序列为输入、以高斯函数和43分别作为NF 子模型第一层的隶属度函数及其规则数，青龙港水位预测的最优联合模型结构以滞后1~4 天的TD序列为输入、以钟型函数和24 分别作为NF 子模型第一层的隶属度函数及其规则数。综合比较表明，DWT-NF 模型的预测效果显著优于其他联合模型及常规模型，尤其对河口未来中长期水位变化趋势的预测效果显著。
关键词：水文学及水资源；水文信号预测模型；离散小波变换；模糊神经；河口日水位；中长期预测
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14320.全球电力变压器市场报告（2015-2019年）
[电力、热力、燃气及水生产和供应业,电气机械和器材制造业] [2015-04-06]
Power transformers are essential electrical equipment used to increase or decrease voltage in the power transmission process. They are segmented into 100 MVA-500 MVA and 501 MVA-1200 MVA capacities.
关键词：电源变压器；增加；减少；电压；电气设备；动力；传递过程
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