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Base on the risk analyses on popular and fire-prone appliances such as air conditioner, refrigerator, washer, television and water heater, etc., results from research by experts world-wide together with our own experience of investigating fire accidents, this paper reviews and presents research results on causes of fire and the investigation methods. We propose several major factors which lead to most of the accidents of home appliance fire. These factors include flaws in design, failures of components, environmental conditions and improper operations.

本文的主要工作及结果如下： 1、通过对空调器、电冰箱、洗衣机、电视机和电热器具(包括电熨斗、电热毯、电热水器)等常见的、容易引起火灾的家用电器的工作原理和结构特点进行分析，指出容易引起火灾的因素，并参考国内外火灾事故调查专家和同行的研究成果，总结出家用电器火灾发生的主要原因是由于设计制造缺陷、元器件故障、外界环境影响和使用者操作不当等几大因素造成的。

With the fast development of railway passenger market, the inverter is widely used, but the working circumstances are quite unfavorable for inverters, such as humidity, high temperature, strong mechanical shock, over-voltage and over-current, which result in high failure ratio of inviters.

车载逆变器的工作环境中存在着高湿、高温、强烈震动、过电压过电流冲击等不利因素，从而导致了逆变器具有较高的故障概率，为了提高逆变器故障检修的效率与准确度，研究智能化的逆变器故障自动诊断系统具有十分重要的意义。

Traditionally linear prediction vocoders are very efficient, which can encode speech from 800 to 2400bps, but unfortunately, artifacts such as buzzes, thump, and tonal noise always exist in them.

经典的线性预测声码器具有很高的编码效率，可以极低的码率(800～2400bps)对语音信号进行编码，不幸的是它的合成语音听起来很不自然，常常夹杂着嗡嗡声，重击声或者音调噪声。

Electrician Cheng checks and accept a standard: Switch of leakage of electricity is installed it is correct, normal to use; The installation of electric parts of an apparatus, equipment is secured should firm, level off; Experiment of electric equipment electrify, lamps and lanterns tries bright reach lamps and lanterns to control function good; The exterior of parts of an apparatus such as box of switch, electrical outlet, terminal is in good condition, insulation parts of an apparatus is flawless, installation is firm, smooth, installation means accords with a regulation; The switch of paratactic installation, electrical outlet the deviation of terminal box, the clearance of periphery of the face plate of box of dark outfit switch, electrical outlet, terminal, box accords with a regulation; Authority of function of weak cable system is complete, satisfy use requirement, implemental installation is firm, smooth.

电气工程验收标准：漏电开关安装正确、使用正常；电气器件、设备的安装固定应牢固、平整；电器通电试验、灯具试亮及灯具控制性能良好；开关、插座、终端盒等器件外观完好，绝缘器件无裂纹，安装牢固、平正，安装方式符合规定；并列安装的开关、插座终端盒的偏差，暗装开关、插座、终端盒的面板、盒周边的间隙符合规定；弱电系统功能权齐全，满足使用要求，器具安装牢固、平正。

Based on one-cycle control having such merits as anti-perturbation of source, fast dynamic response, robustness, constant frequency, but when converter works in light load its power factor becomes very poor. The modified OCC was proposed, adopting feed-forward compensation control improves influence of power factor at light load, further study adopting independence saw tooth wave completely eliminate influence of power factor at light load.

基于单周期控制有源前端变换器具有抗电源扰动能力强、动态响应快、鲁棒性强、恒频控制等优点，但在轻载时变换器的功率因数变差，提出了改进OCC策略，采用前馈补偿控制改善轻载时对功率因数的影响，进一步研究采用独立的锯齿波电路完全消除轻载时对功率因数的影响，建立改进OCCAFE变换器的数学模型。

There are some important and novel conclusions deduced: 1. The curve of resonance output vs excitation voltage shows that electrostatically excited resonator could be easily excited by low excitation voltage and could be well protected when overloaded due to the good structure design.

静电激励微谐振器谐振峰值与交流激励电压的关系曲线表明该谐振器在较低的电压激励下即可获得较大的振幅，同时该谐振器具有良好的过载保护功能，在用于精确测量时，必须保证激励电压处于该曲线的线性段。

From the early fifth century, and for about 250 years, the potter's wheel – that most basic tool, which enables thin-walled and smoothly finished vessels to be made in bulk – disappeared altogether from Britain.

从5世纪初开始的约250年的时间里，陶工的轮具——最基本的工具，能大批量制作光滑的薄壁器具——也完全从英国消失了。

From the early fifth century, and for about 250 years, the potter's wheel ndash; that most basic tool, which enables thin-walled and smoothly finished vessels to be made in bulk ndash; disappeared altogether from Britain.

从5世纪初开始的约250年的时间里，陶工的轮具mdash；mdash；最基本的工具，能大批量制作光滑的薄壁器具mdash；mdash；也完全从英国消失了。

It can be used as a versatile instrument for techniques like gel staining, western blotting, in site hybridisation on fixed tissue as well as for approaches on embyos(mouse, frog, zebrafish and many others).

它作为凝胶的技术用途广泛的器具使用，西方在固定的薄纱织品上的位置杂交和为在胚胎上的方法(老鼠、青蛙、 zebrafish 和许多其他)。

Ainu origins have been investigated archeologically for many years, and we have a few materials here that represent some of the precursors to Ainu culture including Jomon materials which is one of the old cultures of Japan seen here and some Okhotsk culture materials in the next case.

考古学者对阿伊努人的起源研究了许多年，我们手头上有一些展品是处于阿伊努文化之前的，比如说古日本文明的其中之一，绳纹时期的器具，另一边还有些鄂霍次克文化的物品。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。