Until the eighteenth century, people relied on energy derived from plants as well as animal and human muscle to provide power.
直到18世纪，人们还依赖于来自植物、动物和人类肌肉的能量来为自身提供动力。
Reykjavik, the capital of Iceland, is entirely heated by geothermal energy derived from volcanic heat.
冰岛的首都雷克雅未克完全是用火山热产生的地热能来供热的。
And in Brazil, an energy efficiency fund derived from utility company revenues provides one platform for further improvements.
在巴西，由公用事业公司的收入衍生出来的一个能效基金为进一步改善提供了一个平台。
All of the lighting is derived from energy efficient LEDs.
所有照明均使用节能发光二极管。
All of the lighting is derived from energy-efficient LEDs, water is heated using solar panels, and all of the home's greywater is recycled.
屋内所有的照明均使用节能发光二极管，热水用太阳能板加热，所有生活污水均会回收。
Some end value condition derived by variational method in accordance with the least energy loss principle and their mechanical background are also dealt with.
同时从能量最小原理出发，用变分的方法推导出几种端值条件，说明它们的力学背景。
A a nucleotide derived from adenosine that occurs in muscle tissue; the major source of energy for cellular reactions.
肌肉细胞中由腺苷衍生而来的核苷酸，细胞反应的主要能源。
Models of theoretical processes are derived from first principles, using material and energy balances and fundamental laws to determine the model.
理论过程的模型是从第一原则得到的，这一原则利用物质和能量守恒以及基本法则来决定模型。
New equivalent target expression was derived by theoretical ana - lysis based on the principle of energy equivalence instead of strength equivalence.
通过理论分析采用能量等效的原则建立了新的等效靶公式，取代了原来由强度等效得出的等效靶公式。
The local energy and instantaneous frequency of the signal can be derived from the IMFs.
信号的局部能量和瞬时频率都可以从其本征模函数中推导出来。
In the bistatic sonar buoys system, the mathematic model of the maximum detectable area is derived according to the relationship of energy.
在双基地声纳系统中，根据能量关系推导出双基地声纳系统最大可探测范围的数学模型；
Therefore, some sediment transport theories derived from these energy balance equations of sediment-laden flow, such as sediment transport intensity, resistance in movable bed, etc.
从而从这些有缺陷的能量平衡方程所得到的一些泥沙运动理论，如输沙强度、动床阻力等，就难免在理论上存在一定的不足。
The nonlinear energy integral equation describing the evolution of ion density has been derived.
导出了描述离子密度变化的非线性的能量积分方程。
This paper analyses the deformation characteristics of granular materials at critical state, and the deformation regulation is derived on the principle of energy equilibrium.
分析了散粒体临界状态下的变形特征，应用能量平衡原理导出了临界状态下的变形规律。
The method suggested is based upon a theory of adjoint fields derived from generalized energy theorem of electromagnetism.
方法是根据作者在文中导出的电磁场的广义能量定理，选择适当的伴随场可以求出扰动后场的各阶容差。
By using finite difference method, the derived equation was solved coupling with energy conservation equations.
利用有限差分法将该方程与能量守恒方程进行了耦合求解。
The kinetic energy theorem of mass variable system is derived from the kinetic equation of mass variable body.
从变质量物体的动力学方程出发，推导出变质量系统的动能定理。
A system consisting of soil layer, mulch layer and atmospheric boundary layer is developed and energy balance equation for each layer is derived.
建立了一个包括土壤层、塑膜覆盖物、植物冠层和大气边界层的系统，系统中的各层进行了能量平衡计算。
How long can we continue to supplement agroecosystems with energy derived from declining fossil fuel supplies?
由于矿物燃料供应量下降，我们供应农业生态系统能量能持续多久？
In this paper not only the equation based on the conservation of energy is derived, but also the flow profile and the states of flow are analyzed.
本文不但基于能量守恒原理推得了变量流的基本微分方程序，而且对其水流剖而形式及流态作了分析。
This paper discusses how correctly understand the repulsion force between the contacts, and the formula is derived for calculating the force by principle of energy balance.
本文讨论如何正确理解触头间的推斥电动力，并用能量平衡原理对触头推斥电动力的计算式作了分析与推导。
Under this framework, the stress-strain relations are derived from a pseudo-elastic strain-energy density.
在这一理论框架下，增量的应力应变关系可以从所构造的能量函数中推导出来。
The theorem of relativistic kinetic energy has been derived, and the normalized model of relativistic space charge wave is derived as well.
导出了相对论电子注的动功率流定律，求得了相对论空间电荷波的正规模式。
Applying the principle of minimum total potential energy, the spline subdomain method of folded plate structures is derived.
应用最小势能原理，建立了折板结构分析的样条子域法。
From the thermodynamic relations and equations derived from the energy balance and heat ex-changer characteristics, an objective function and constraining equations are obtained.
从热力学关系式、能量平衡方程和换热器特性得到了热经济学优化的目标方程和约束方程。
The radial bound state solutions are expressed in terms of the confluent hypergeometric functions and the energy equation is derived from the boundary condition satisfied by the radial wavefunctions.
径向束缚态波函数用合流超几何函数表示，束缚态的能量方程可由径向波函数满足的边界条件得到。
In this paper, the tangent stiffness matrices and the secant stiffness matrices of space trusses are derived with the energy principle in the Total Lagrangian coordinates.
本文在T．L．坐标下，利用能量原理，同时导出了空间杆元精确的割线刚度矩阵和切线刚度矩阵显式。
Also the press cake derived from the energy balance tests reveal a faster increase in weight of animals fed with products made from decorticated rapeseed than undecorticated.
同时压榨饼在相同能量供给试验中对家禽饲养较不脱皮菜籽饼表现出一更高的增重率。
A log of elemental concentrations derived from the characteristic energy levels of gamma rays emitted by a nucleus that has been activated by neutron bombardment.
记录元素浓度的测井方法，利用中子轰击原子核，使其激活后释放出伽马射线，根据伽马射线的特征能量级可获得元素浓度。
A log of elemental concentrations derived from the characteristic energy levels of gamma rays emitted by a nucleus that has been activated by neutron bombardment.
记录元素浓度的测井方法，利用中子轰击原子核，使其激活后释放出伽马射线，根据伽马射线的特征能量级可获得元素浓度。
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