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Wide-area measurement information of power grid is used for enacting protection strategies in WAPS, so it could make protections located at different positions in power grid work cooperatively. After analysis on availability of wide-area information in protection system, building WAPS to defend three different types of power system stability problems is presented, and two functions of WAPS, wide-area backup protection and wide-area emergency control, are expounded in the paper.

进而讨论了广域测量信息在保护中的可用性，提出按电力系统&三道防线&要求构建广域保护系统，阐述了广域保护的两大功能：广域后备保护和广域紧急控制。

Open-phase operation in large power unit is very harmful to generator and theoperation of power system. The study on open-phase operation and the analyses ofextracted fault information are of great value to the safety of generator and the operationof power system.

发电机组非全相运行的分析与研究，以及非全相故障信息的提取与判断，对于保护发电机组与系统的运行安全有着非常重要的研究价值。

Based on the year of Electric Power Industry 2005-2008 data sample empirical study found that: China's electric power companies of investment spending and asset liability ratio, long and short term debt ratio, the proportion of bank loans, commercial credit ratio and the ratio of long and short term borrowings were significantly negative correlation, that debt can play a listed company of China Power Investment spending restraints of debt and debt maturity structure and the different types of debt structure binding effects were not significantly difference

本文通过对我国电力上市公司2005-2008年度数据样本的实证研究发现：我国电力上市公司的投资支出与资产负债率、长短期负债比例、银行借款比例、商业信用比例以及长短期借款比例均存在显著的负相关性，证明负债可以发挥对我国电力上市公司投资支出的债务约束作用，并且负债的不同期限结构和类型结构的债务约束效果没有显著的差异性。

Now it is not only germany's biggest owner-managed manufacturer of power supplies, but also a leader in the technology for switched-mode din rail power supplies.npuls electronics co., ltd was established in august 2005 in suzhou industrial park. it is a fully-owned company of puls gmbh with a focus on design, development and manufacture of switched-mode power supplies.

目前不仅是德国最大的电源产品自营制造商，同时也是din导轨式开关电源技术的领先者。n普尔世电源产品有限公司是德国普尔世电源有限公司在中国的独资企业，于2005年8月在苏州工业园区注册成立，主要进行工业开关电源的设计、开发和制造。

The results showed that stretcher power sprayer and power mist-sprayer and gallus power sprayer had no influences on bioactivity of the biocontrol strain.

盆栽试验结果表明：担架式机动喷雾机、机动弥雾喷粉机和背负式机动喷雾器对生防菌的活性无不利影响。

The list of comfort and convenience features includes a power-operated convertible top that opens or closes in approximately six seconds (replaced by a removable aluminum hardtop on the S2000 CR), power door locks, power windows, cruise control, Immobilizer Theft-Deterrent System and keyless entry for the doors and the trunk.

在舒适和方便的功能列表包括权力操作的车顶打开或关闭约6秒（由一个可移动的S2000的公约与铝硬顶取代），电动门锁，电动车窗，巡航控制，Immobilizer偷窃威慑系统和无钥匙进入大门和躯干。

In this paper a power-saving scheme for mobile Ad hoc networks based on IEEE 802.11 DCF is proposed.Under the proposed scheme,the source node will regulate the transmit power of the data packets dynamically by the use of a method of pre-estimation of average noise power and the feedback of RTS/CTS handoffs during the reception.

基于IEEE 802.11 DCF MAC协议提出了一种适用于移动无线自组网的功率控制节能方案，在该方案中节点通过一种接收过程中的噪声功率预估计方法和RTS/CTS握手机制的反馈，动态调节待发送数据分组的发射功率。

In this paper the basic principle of dynamic simulation with PSS/E is presented; the effectiveness and adaptability of flexible HVDC power transmission model are analyzed, and on the basis of actual power system the quasi steady-state VSC-HVDC dynamic model VSCDCT is simulated. Simulation results show that it is available to apply PSS/E in transient stability analysis of practical large-scale AD/DC power system.

介绍了PSS/E动态仿真的基本原理；分析了柔性直流输电模型VSCDCT的有效性和适用性，并基于实际系统对准稳态直流动态模型VSCDCT进行了仿真研究，仿真结果表明 PSS/E直流模型能够满足大规模交/直流系统仿真的要求。

An electromagnetic power steering kinematics model is built combined with the sensor and power equipment"s kinematics characteristic, then according to bond graph theory the bond graph model and diamond model of the electromagnetic power steering system are built based on the kinematics model. They could lead to the system"s transfer function, which is combined with automobile"s two freedom degree model, finally leads to the system"s model in condition with step input of steering wheel.

结合转矩传感器和电磁力发生装置的动力学特性建立了电磁式助力转向系统的动力学模型，然后在系统的动力学模型的基础上根据键合图理论建立了电磁式助力转向系统的键合图模型及其方块图模型，从而导出系统的传递函数，再结合二自由度汽车模型，最终建立了系统在方向盘转角阶跃输入下的模型。

Two types of steering system are commonly used on cars: manual system and power system8 all power steering systems require a power steering pump attached to the engine.

两种类型的助力转向系统的普遍使用，对汽车：手动系统和电力系统八，所有动力转向系统需要一个动力转向泵连接到引擎。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。