At first , based on conservation of energy , a three - port network is brought up . then , after discussing the power flow in the three - port network , a systematical procedure is derived to generate all possible minimal configurations 首先，根据能量守恒定律，建立了pfc的三端模型：然后，分析三端之间的能量流图，推导出pfc的拓扑结构。
Thirdly , according to the conservation of energy principle , this paper analyzes the relationship between the hot ? ire and the airflow rate , establishes primary model of the hot ? ire . in this paper the simple mathematical model of pfras were given out （ 3 ）利用能量守衡的原理，分析了传感器敏感元件中的热线与气流速度之间的关系，建立了热线的基本模型，从而给出压电射流角速度传感器的数学模型。
Thermodynamics the first laws are conservations of energy law , say namely the energy simplely being able to not create something out of nothing , also unable intangible disappear , the energy can change from one kind of form being that another kind of form , the general energy are invariable in nature 热力学第二定律是描述热量的传递方向的：分子有规则运动的机械能可以完全转化为分子无规则运动的热能；热能却不能完全转化为机械能。
Food and environmental hygiene department is committed to ensuring that all our services are delivered in an environmentally responsible manner , particularly in the collection , recycling and reduction of waste , conservation of energy and water , and prevention of air , noise , water and soil pollution 食物环境?生署致力以符合环保原则的方式提供所有服务，特别是在收集循环再造及减少废物，节约能源及用水，以及防止空气噪音水及泥土污染等方面。
The food and environmental hygiene department is committed to ensuring that all our services are delivered in an environmentally responsible manner , particularly in the collection , recycling and reduction of household waste , conservation of energy and water , and prevention of air , noise , water and soil pollution 食物环境?生署在提供服务时，力求符合环保原则，特别注重收集循环再造及减少家居废物，节约能源及用水，以及防止空气噪音水及泥土污染。
Food and environmental hygiene department is committed to ensuring that all our services are delivered in an environmentally responsible manner , particularly in the collection , recycling and reduction of waste , conservation of energy and water , and prevention of air , noise , water and soil pollution 食物环境?生署致力以符合环保原则的方式提供所有服务，特别是在收集、循环再造及减少废物，节约能源及用水，以及防止空气、噪音、水及泥土污染等方面。
The food and environmental hygiene department is committed to ensuring that all our services are delivered in an environmentally responsible manner , particularly in the collection , recycling and reduction of household waste , conservation of energy and water , and prevention of air , noise , water and soil pollution 食物环境?生署在提供服务时，力求符合环保原则，特别注重收集、循环再造及减少家居废物，节约能源及用水，以及防止空气、噪音、水及泥土污染。
The epd now proposes to impose a mandatory labelling requirement for some products , to promote greater efficient use and conservation of energy . a scheme was proposed in 2005 that would require local manufacturers and importers to display energy efficiency labels on all air - conditioners , refrigerators and compact fluorescent lamps at point of purchase 为加强推广善用和节约能源概念，我们于2005年建议推行强制性能源效益标签计划，规定本地制造商和入口商为所有冷气机雪柜和悭电胆加上能源效益标签。
In the light of the time co - reliance of the wire ropes , the calculation formula of the rope tension efficient was deduced through the law of conservation of energy before and after the wire ropes ware rolled . moreover , the feature problems of the load outside the drums under the binding function of the wire ropes were solved and the calculation method concerning the rope circle tension was derived 在考虑钢丝绳时间相依特性的前提下，利用钢丝绳卷绕前后的能量守衡关系推导了绳圈张力系数计算表达式，解决了钢丝绳紧箍作用下卷筒外载荷的特性问题及其绳圈张力相关的计算方法。
In this paper , charge calculating formulas and their relations of cutting chamber loose blasting are firstly analyzed with the theories of dimension , fluid dynamics . explosive dynamics , etc and the significance of the explosive factor in it is pointed out . calculating methods of the explosive factor are researched by law of conservation of energy , and then a new one is brought forward which proves to be rational and reliable by a sample 本文首先采用量纲分析、流体动力学、功能平衡理论、爆炸动力学等理论，分析了路堑硐室松动爆破装药量计算公式及其内在联系，并指出k值在现有药量计算公式中的重要性；在分析现有k缺陷的基础上，利用能量守恒原理，研究了路堑硐室松动爆破单位炸药消耗量计算方法，并提出一种新的k值计算方法，实例验证本方法合理、可靠，优于其它k值计算方法。
