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Abstract: A mathematical model describing the effect of flow nonuniformityon the performance of compact heat exchanger is provided,which is based on that one side of heat exchanger is uniformly distributed but the other is of maldistribution.The model may
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文摘:以一侧流体分配不均匀的换热器模型为基础，建立了物流分配不均匀性对换热器效能影响的数学模型，通过理论分析和计算，为研究换热器内部物流分配不均匀对其效能的影响提供了一种分析方法.该理论模型包括连续模型和离散模型2种形式，前者为研究物流分配不均匀引起换热器效能的下降提供了一种分析计算方法，后者为控制实验研究的精度提供了理论依据.研究结论对换热器的优化设计具有重要意义. |
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Abstract: A mathematical model of electrical data calculation of coreless induction furnace is proposed and a useful method of measuring stray loss and electrical resistivity at high temperature of crucible is given.
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文摘:提出了一种无芯感应炉电参数计算的数学模型，给出了测量杂散损耗和坩埚高温电阻率的实用方法。 |
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Abstract: A mathematical model of the vibration at the upper segment of a pile when there exist severe defects is put forward based on theoretical analysis, and the curve characteristics of its low strain test is described according to engineering practic
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文摘:从理论上给出了当基桩存在浅部严重缺陷时，在受到瞬态激振力的情形下，桩体上段振动的数学模型，并结合工程实践，描述了其低应变实测曲线的特征。 |
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Abstract: A method by using 8031 single-clip microprocessor to get the syntonical bit information is presented,based on the characteristic of the modulated singal in ascending cosine envelope.The timer is locked at the maximum of the wave peak.The experim
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文摘:利用升余弦包络调制信号的特点，即基带信号为升余弦波，接收端可以利用这一包络，从中提取定时信息.提出了一种将时钟锁定到包络峰值最大点的单片机实现的方法，从而完成了在接收端正确提取定时信息的任务. |
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Abstract: A method is proposed in order to accelerate the convergence of artifcial neural network(ANN) modeling of chemical process,in which the principal components analysis is applied in the data processing in training sets.The result shows that the cor
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文摘:达到提出应用主成分分析法对样本进行预处理，减少网络的输入因子数，消除输入因子间的相关性并简化网络结构，达到提高网络学习速率的目的，得到的人工神经网络模型能达到所要求的精度。 |
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Abstract: A method is proposed in this paper to deduce the synthesized effectiveness of anti-jamming of a radar with comprehensive measures of anti-jamming from separated effectiveness of anti-jamming of several radars with different measures of anti-jamm
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文摘:提出了一种在外场雷达对抗试验中，由多部具有分抗干扰措施的雷达的抗干扰效果推出某种具有综合性抗干扰措施的雷达的合成抗干扰效果的方法，以在不具备该种雷达的情况下，用多部具有分抗干扰措施的雷达来代替它作为被干扰对象，在外场进行干扰机对其干扰的干扰效果试验检验。 |
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Abstract: A method is set forth to calculate the hydrodynamic pressure influence matrix of elastic dam using series development and linear superposition theorem in this paper.
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文摘:利用级数展开和线性叠加原理，本文给出了一种求取弹性坝面动水压力影响系数矩阵的数值算法。 |
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Abstract: A method of eye anterior segment analysis system with slit lamp microscope is presented and，the design thought,system function and interface of development the eye anterior segment analysis management system is elaborated.
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文摘:介绍了应用裂隙灯显微镜进行眼前节分析应用的方法，详细地阐述了所开发的裂隙灯眼前节分析管理系统的设计思想、系统功能和界面。 |
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Abstract: A method of modifying the design of correlation filters for pattern recognition is presented.
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文摘:提出一种改进模式识别相关滤波器的设计方法。 |
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Abstract: A method was put forward for the detection of the fatigue cracks at the thread roots of a drill pipe by using ultrasonic wave.The specific detection probes were designed.Simulated cracks were detected.The results show that the probes can effecti
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文摘:钻杆螺纹根部疲劳裂纹是钻杆钻井服役中产生的常见缺陷类型，是钻杆螺纹发生断裂的重要根源.本文介绍了钻杆螺纹疲劳裂纹超声检测原理，设计了专用超声检测探头和检测装置，给出了检测试验结果，证明了钻杆螺纹疲劳裂纹超声检测的可行性和实用性. |
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Abstract: A methodology to reduce the input fuzzy sets with the hyperplane of generalized state error is discussed in this paper based on sliding mode control (SMC) theory,a method of varying nonlinear fuzzy sets range using some parameter is proposed ,an
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文摘:根据滑动模态原理，将模糊控制系统的输入量简化为广义跟踪误差的一个超平面，并基于三角形的非线性划分语言变量的隶属度，分析了模糊控制系统的某些性质，表明在系统稳定性、稳态误差等指标方面，模糊控制器优于一般的PID控制器. |
