The coefficient of performance at cryogenic temperatures is typically 4-5%.
在性能系数在低温的温度通常是4- 5 %。
The coefficient of performance is taken as an objective function. The performance of the refrigeration system is optimized.
以制冷系数为目标函数，对制冷循环系统的性能进行优化分析。
Secondly, the curves of the cooling load per unit heat-transfer area varying with the coefficient of performance are investigated based on the fundamental optimum relation.
其次，从基本优化关系式出发，对单位面积制冷负载随制冷系数变化的曲线做详细的研究。
The influences of generation temperature, evaporation temperature, absorption temperature to the coefficient of performance, circular ratio and cooling capacity were also studied.
并讨论了循环的发生温度、蒸发温度、吸收温度对循环性能系数、循环倍率和制冷量的影响。
To meet the designed target of the AHT experiment, we assign the coefficient of performance as the objective function, and optimize the system cycle in a specified range of operating parameters.
针对高温热泵样机的设计要求，以系统性能系数为目标函数，对循环系统进行了有限定范围的优化。
A set of formulas for the computation of quadratic performance function associating with first and second-order sensitivities of feedback coefficient matrix is given in this paper.
本文给出了连续系统中计算二次型性能函数对反馈系数阵的一阶和二阶灵敏度的全套公式。
Comparing with traditional construction materials, the ceramic grain concrete possesses the advantages of smaller thermal conductivity coefficient, less weighty and better structural performance.
与传统的建筑材料相比，陶粒混凝土具有导热系数小、重量轻、结构性能好等优点。
The correlative coefficient between desired signal and interference affects the filtering performance strongly, which changes the direction of optimal interference.
期望信号和干扰信号相关性越强，阵列滤波性能差异越明显，且相关系数的相位影响着“最佳”干扰信号的空间到达角。
High strength bolts are widely applied in engineering practice. The torque coefficient is important evaluation parameter of their performance class.
高强度螺栓广泛地应用于工程领域，扭矩系数是评定其性能级别的重要参数。
The experiment shows that by changing the velocity coefficient , the separation of boundary layer on pump vane can be controlled, and the performance of pump is improved and its hydraulic efficiency.
实验证明通过改变叶片型线参数方程中的速度系数的取值，可以控制边界层的分离，进而改善泵的性能，提高其水力效率。
The intake port performance (swirl number, flow coefficient) has an important effect on power, economy and emissions of diesel engine.
进气道性能(涡流强度、流量系数)对柴油机的动力性、经济性和排放有重要影响。
Through experiment, the relation figures of engine rotation speed, coefficient of performance of heat pump and engine thermal efficiency are presented and analyzed.
通过实验，得出了发动机转速与热泵性能系数、发动机热效率的关系曲线，并进行了分析。
The determination of material structure, performance parameters and membrane resistance, membrane diffusion coefficient of the F4112 ion exchange membrane were introduced.
介绍了F4112离子交换膜的材料结构、性能参数及膜电阻、膜中扩散系数的测定方法。
A test system of pyroelectric coefficient was designed to evaluate the performance of pyroelectric materials.
设计了一个热释电系数测试系统，用它来评价热释电材料的性能。
The mathematics model of coefficient of performance for SWHP-RFH is presented after analyzing the operation principle in different conditions.
分析该系统在不同工况运行原理的前提下，建立系统性能系数的数学模型。
The design of port is depended on steady flow test to obtain swirl ratio and flow coefficient and use them to evaluate the performance of intake port.
长期以来进气道的设计主要是依靠气道稳流试验测量其涡流比和流量系数来评定气道的性能。
Reducing the inlet temperature of cooling water and increasing its mass flow are favorable to increase refrigerant performance coefficient, and can decrease optimal pressure at high pressure side.
降低冷却水进口温度和提高其质量流量不仅有利于提高制冷性能系数，而且能降低最佳高压侧压力。
The disperse coefficient and the volume utilization can be used as criteria to evaluate and compare the performance of hydraulic flocculator.
还提出扩散系数和容积利用率可作为评定絮凝器性能重要指标的观点。
As the key parameter in heat transfer analysis of double skin facade system, the convective heat transfer coefficient is very important in considering energy-efficient and economical performance.
该对流换热系数作为双层换气幕墙传热分析的一个关键参数，对考察双层幕墙热工性能、经济性能有着重要作用。
The mixture ratio of C40 Marine high performance concrete is optimized through test of the hydration heat of binding material, slump, chloride ion diffusion coefficient, anti-crack rand of concrete.
通过测试胶凝材料水化热、混凝土的坍落度和氯离子扩散系数、抗裂等级等性能，对C40海工混凝土的配合比进行了优化设计。
Experimental results show that shot boundary detection methods, based on the shot boundary coefficient model, can improve the performance of shot boundary detection.
实验结果表明，基于镜头边界系数模型的镜头边界检测方法能明显改善镜头边界检测结果。
The cavity pull effect, microwave power shift, light shift and temperature coefficient which mostly influence the performance of RAFS are studied.
研究了腔牵引效应、微波功率频移、光频移和缓冲气体温度系数对铷频标输出频率的影响。
The multiphase reactor have a lot of advantages such as high coefficient of mass transfer, good performance of mixing and easy to control etc.
多相流态化反应器具有如传质系数高，混合性能好，操作简单等优点。
Acknowledge the main factors which have influence on coefficient of performance of refrigeration cycle and the way to improve it.
了解分析影响各种制冷循环的制冷系数的主要因素及提高制冷系数的途径。
The smaller the synthetic power coefficient is, the better overall performance of propulsion system will be.
综合功率系数愈小，推进系统的整体性能愈好。
The approximation coefficient from wavelet decomposition includes much information relating with device reliability and is more sensitive to the change of device performance.
小波分解后的概貌信息，具有更多的可靠性细节信息，对器件性能的改变更敏感。
The concept of Associated Coefficient of Performance was presented, and the feasibility of air-conditioning system assisted by medium-high temperature heat pump was analyzed.
提出了联合性能系数的概念，分析了利用中高温热泵辅助太阳能空调系统的可行性。
Secondly, in the prefabricated system, through the addition of raw materials with lower heat conduction coefficient, raising warming performance of lining material.
其次，在该预制件体系中通过添加导热系数较低的原料，提高内衬材料的保温性能。
The relation between the optimal coefficient of performance and the rate of refrigeration of a Carnot refrigerator for an idea or van der Waals gas as a working fluids(?)derived.
导出以理想气体或范德瓦耳斯气体为工质的制冷机最佳制冷系数与制冷率间的关系。
Therefore, the ruggedness coefficient of the fitness landscape is essential for performance of heuristics.
因此，适应度地貌的粗糙系数决定了启发式算法的求解性能。
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