查询词典 thermal efficiency

During the PL measurement excited by 405nm diode laser, the decreasing PL intensities of the biased LED sample were observed by increasing the measurement temperature that was caused by the thermal and tunneling effect to have the lower internal quantum efficiency.

在光激发萤光系统上，以405nm波长的雷射作为激发光源，在外加偏压测试环境下可以发现室温(300K)强度因载子热效应与穿隧效应而快速递减，导致内部量子效率较实际值低。

The effect of thermal conductance of the component and the contact layer on output power and efficiency was discussed.

建立了热电发电器件工作的一维模型，应用热力学理论分析了发电器件的输出功率和效率，并重点讨论了元器件热导及热端板、冷端板与元器件间的接触层热导对输出功率和效率的影响。

In the design,the optimum radius of the rear convex mirror was presented which could efficiently compensate the effect of thermal lens,and the resonator would become a equivalent stable resonant operation dynamically. A slope efficiency of 13% and beam divergence of 1.3 mrad were achieved.

选择的凸面全反镜的最佳曲率半径有效地补偿了增益介质热透镜效应，激光器实现了动态稳腔运转，激光脉冲能量输出斜度效率大于13%，光束发散角优于1.3 mrad。

The main contents of this paper are asfollows: Programmed a software which is used in simulating the dynamic energyconsumption of buildings based on transferring function principle in the language ofvisual basic, at the same time compared with the traditional way of calculation ofenergy consumption in buildings to prove the correctitude of the software;Foundviable way of energy efficiency in buildings in the way of analyzing walls, windows,and many other aspect of structure of buildings, and using the software to analyzethe rate of the contribution of thermal quality to the energy consumption of buildings;Analyzed the rate of the contribution of the different weather to the energyconsumption of the existing dwelling in the way of calculating the energyconsumption in the whole year of the existing dwelling in two model cities choosefrom the region of north China and south China. Also is carrying on the contrast andviability assessments on the energy saving of the existing dwelling between northand southern region, getting the viability assessments and the conclusions inparticular data.

本文主要研究内容是：依据传递函数法原理应用Vb语言编写建筑物动态负荷仿真软件，并与传统负荷计算法进行比较，分析了程序的可靠性；从墙体，窗户及建筑结构的其它几个方面分析了建筑节能改造的一些可行性途径，并针对对建筑能耗影响较大的墙体与窗户就其热工性能的改变对能耗的影响应用程序进行了具体的分析；针对因地域性差异造成的气候差异对建筑节能措施效果的影响，就既有建筑的节能改造，分别选择华南华北地区的两个典型城市对其既有建筑节能改造前后的全年动态时时负荷进行计算，通过对比华南地区和华北地区的两个典型城市的既有建筑节能改造前后的能耗，及两城市节能改造后的节能效益，初投资回收期等方面，得出地域差异导致的气候差异对既有建筑节能改造的效果的影响的指导性结论及南北两地域既有建筑改造的量化结论和改造可行性的分析结论。

Thereafter B-A1 paste-layer diffusion technology and close-tube Ga-diffusion technology had been developed, while the former can lead to relatively large the base-region deviation and abruptly varied region in Si, which caused severe decentralization of current amplification parameter β, bad thermal stability and high tr; the latter needed the relatively difficult pack technique, with poor repeatability , high rejection ratio, and poor diffusion quality and production efficiency.

此工艺发明以来，克服了上述两者的弊端，杂质浓度和结深能准确控制而又能任意调整，可进行低、高浓度阶段性掺杂，得到元素Ga在Si中的理想分布，而且表面浓度均匀一致、重复性好、合格率和优品率高，改善和提高了器件的综合性能。

The results show that the decalescence of catalyst bed affects the process of hydrogen peroxide catalytic decomposition greatly. If the catalyst bed is preheated or made up of materials with low thermal conductivity, that influence can be depressed. At the same time, the response characteristic of catalyst bed and the efficiency of catalytic decomposition can be improved. The low frequency pressure instability of catalyst bed occurs because of the coupling of catalytic decomposition and supplying. The decomposition plane pushes all the way through the catalyst bed during pressure oscillations, causing unreacted liquid hydrogen peroxide to be exhausted from the bed and leading to the appearance of liquid hydrogen peroxide channeling. Consequently, how to prevent or at least limit this channeling is the key to eliminate the pressure instability of catalyst bed. It was found that adding clapboard to the catalyst bed can depress the pressure instability efficiently.

结果表明催化剂床及催化剂的吸热对过氧化氢分解过程影响很大，对催化剂床进行预热或采用热导率低的材料制造催化剂床等措施，可以降低催化剂床壁面吸热对催化分解过程的影响，提高催化剂床的响应特性和催化分解效率；催化剂床的低频不稳定是催化分解过程与供应系统耦合产生的，催化剂床气体界面的波动过程中，液体过氧化氢穿透催化剂床形成过氧化氢液体通道，过氧化氢液体通道的产生和扩大是催化剂床不稳定的主要原因，也是消除催化剂床不稳定的关键，试验中在催化剂床内加入分流板成功地抑制了催化剂床的低频不稳定。

Cold origin of Thermal storage air condition system: it can store energy when at night the need of electricity is small and electrovalence is low, thus improving the utilization efficiency of the host computer and save electricity fees.

冰蓄冷空调系统冷源：可在夜间电力需求少、电价低谷时段进行低温冰层蓄能，白天电力需求多、电价高峰时段主机与融冰同时供冷，从而利于提高主机利用效率、有效节约电力费用。

There are eight main hypotheses about the selective factors on evolution of endothermy in animals, including Thermal Niche Expansion Model, Homeothermy and Metabolic Efficiency Model, Decreasing Body Size Model, Postural Change Model, Increasing Brain Size Model, Aerobic Capacity Model, Parental Care Model and Assimilation Capacity Model.

内温性起源的选择因子包括8个模型：热生态位扩展模型、恒温与代谢效率模型、降低个体大小模型、姿势改变模型、增加脑大小模型、有氧呼吸能力模型、双亲行为模型和同化能力模型。

Intermediate heat cycle can be reduced because the tail blade turbine steam humidity and reduce steam consumption. improve plant efficiency and thermal cycling in the unit were popular, however, Reheat temperature control system with nonlinear their targets, inertia, the characteristics of delay, Power Plant to become more difficult to control the system-paper fuzzy control theory and fuzzy logic, reconsidered conventional PID control law on the basis of the study and intelligent fuzzy PID control, the 300MW units Reheat fuzzy control process using adaptive PID control, the introduction of load feedforward. design configuration, the final design complex adaptive feedforward cascade control system and MATLAB for simulation, simulation results show that the response speed, Robust control and accuracy, the system has considerable advantages Unit to improve the efficiency and reduce the operational workload.

中间再热循环技术因其可以降低汽轮机尾部叶片的蒸汽湿度和降低汽耗，提高电厂的热循环效率而在单元机组中被普遍采用，然而，再热气温控制系统因其对象具有非线性，大惯性，大迟延等特点，成为火电厂较难控制的系统之－，本文运用模糊控制理论和模糊逻辑推理，在重新认识常规PID控制规律的基础上探讨了PID与智能模糊控制相结合，在电厂300MW发电机组再热模糊控制过程中使用自适应PID控制，引入负荷前馈，设计组态，最终设计出自适应复合型前馈串级控制系统，并在MATLAB中进行仿真模拟，仿真结果表明，在响应速度，鲁棒性和控制精度等方面，此系统都具有相当大的优越性，有利于提高机组的效率和减轻运行人员的劳动负荷。

Monitoring the efficiency of thermal cycle is quite difficult because some of the parameters are not amenable for measuring, especially the variation of the efficiency caused by the worsening of the vacuum of the condenser.

汪健热力循环经济性能指标的在线监测由于受到某些不可测参数的限制而不易实现，尤其是凝汽器真空变化所引起的指标变化很难实现在线监测。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。