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     The fact that batch-mode learning algorithm is no better than online-mode learning algorithm is deduced through theoretical analysis and illustrated by simulation results.
     本文仿真结果和理论分析表明,与在线学习算法相比,批学习算法并不是一种更为有效的方法.相反,在线学习算法的学习性能(收敛精度和收敛速度)均优于批学习算法
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     This paper presents a parcel-mixed layer model, and emphatically simulate the change in physical properties with time, including temperature, salinity, mixed layer depth and entrainment velocity, for a parcel carried by currents passing through the Strait of Florida (24°N, 80°W) to the Norwegian Sea (68°N, 10°E) in the Extended Gulf Stream System (EGSS).
     文章提出了水块混合层模式,着重模拟了扩展湾流体系(EGSS)中的一个水块,在它被海流从佛罗里达海峡(24°N,80°W)带到挪威海(68°N,10°E)的过程中,其物理特性(其中包括温度、盐度、混合层深度和夹卷速度)随时间的变化。
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     TDI paraments included peak early diastolic annular velocity (E),peak diastolic annular velocity with atrial contraction(A),and isovolumic relaxation time (IR)intervals,calculating the ratio of E/A.
     然后应用组织多普勒技术测定E波(舒张早期三尖瓣环运动峰值速度)、A波(舒张晚期三尖瓣环运动峰值速度)和IR(等容舒张时间),并计算E/A比值。
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     In addition, a new criteria GF/RF (GF-critical solid fraction ratio gradient,RF-critical solid fraction rate) is proposed for shrinkage porosity prediction and has been used in foundry industry.
     还提出了预测铸钢件编松的新判GF/RF GF/RF(GF为临界固相率梯度, RF为临界固相率推进速度),并在生产中得到了应用。
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     5%GrP and vol. 10% SiCP were examined. The wear mechanisme of the hybrid composite were discussed under different loads and sliding speeds.
     测试了5vol%GrP和10vol%SiCP混合增强ZA27复合材料的磨损性能,讨论了该材料在不同载荷(定滑动速度)、不同滑动速度(定载荷)下的磨损机制。
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     The flow chart of this approach includes three main parts: (1) seismic data preprocessing,(2) velocity-depth model building, and (3) prestack depth migration and imaging.
     (2速度-深度模型建立;
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We show that the rate of convergence for this reconstruction algorithm is geometric and computable in advance.
      
Finally, we consider the effect on the rate of convergence of not sampling enough local maxima.
      
We show that the rate of convergence for this reconstruction algorithm is geometric and computable in advance.
      
Finally, we consider the effect on the rate of convergence of not sampling enough local maxima.
      
For compactly supported gm, n (FIR filter banks) we prove an exponential rate of convergence and derive explicit expressions for the involved constants.
      
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In this paper the logical structure of contactless telemechanical system for distributed objects is discussed. A simple method of variable system structure for transmitting and receiving telemechanical information is adopted. The idea is that the information oc-curred in every controlled point (station) and the information of some of those objects,which frequently change their states, are transmitted continually and cyclically, while for other objects their information is transmitted only after any change in...

In this paper the logical structure of contactless telemechanical system for distributed objects is discussed. A simple method of variable system structure for transmitting and receiving telemechanical information is adopted. The idea is that the information oc-curred in every controlled point (station) and the information of some of those objects,which frequently change their states, are transmitted continually and cyclically, while for other objects their information is transmitted only after any change in their states. Thus,the speed of operation will be increased, and also the error probability of system syn-chronization will be decreased. For the realization of the variable logical system struc-ture, several blocks are used repetitively. For example, two commutators and one sim-ple logical unit are used to construct a simple automatic sequential encoder, and at the same time, the two commutators are used also to operate as a matrix commutator for receiving telesignalling information etc. Therefore the system is comparatively simplified and attains a higher degree of "minimization".

本文研究了无触点集中-分散目标远动系统的逻辑结构.文中提出了采用简单的系统变结构来发送和接收信息的逻辑结构方式.对被控制点及一部分比较重要或变化比较频繁的被控制目标的信息,保留了循环传送,而对大部分变化比较慢的被控制目标则采用目标有变化时才传送信号的方式,这样就提高了系统的平均动作速度,同时也减小系统的失步概率.文中采用环节的复合利用及简化的逻辑单元线路来实现这种系统的逻辑结构.例如用两个分配器和一个简单的逻辑单元“和”线路组成了很简化的选点自动程序编码器,同时这两个分配器又复合利用兼组成目标信号接收矩阵式分配器等,因而可以使得这种系统同时又具有较高的极简化度.

Equations determining the velocity and density distributions within the mixing region of two incompressible gases with different densities are set up, their temperatures being assumed to be the same. For incompressible mixing the total number of gas molecules per unit volume is constant, although the density of the gaseous mixture varies from point to point due to diffusion of matter. As an illustration we consider the plane jet and steady motion. The boundary layer method of approximation can still be applied....

Equations determining the velocity and density distributions within the mixing region of two incompressible gases with different densities are set up, their temperatures being assumed to be the same. For incompressible mixing the total number of gas molecules per unit volume is constant, although the density of the gaseous mixture varies from point to point due to diffusion of matter. As an illustration we consider the plane jet and steady motion. The boundary layer method of approximation can still be applied. The boundary of the jet is shown to be the same as that for one fluid. The solution of the problem then depends upon the numerical value of the coefticient of viscosity of the mixture which is a function of the number of molecules of each constituent gas in the unit volume. The present method of investigation is applicable to the cylindrical and half jets and also to the case where the two gases are at different temperatures.

本文求出规定二不能压缩气体的分片合流运动时,速度与质量密度分布的微分方程式。假定两种气体的密度不同但温度则相等。不能压缩的定义是每单位体积中的两种气体分子数的和不变。本文只讨论一平面守恒注中所需要的微分方程式。粘滞流体运动中之边界近似法仍可应用。同样方法亦可用到守恒圆柱体注,半注及气体中温度不同诸问题。

The phenomellon of limiting heating is of vital importance and interest in the study of gas' flow through a tube with heat additioll fi.om both theoretical and practical points of view. In particular, it has applications to the design of thel.mal ducts of pl'opulsive devices for high speed aircraft. TI}ils poper col,sists of a prelimillary "study Of limiLing'heating for the;(jfole case of a perfect gas in steady flow through a tube of unifornl cross section. It starts from tile fulldamelltal laws governing...

The phenomellon of limiting heating is of vital importance and interest in the study of gas' flow through a tube with heat additioll fi.om both theoretical and practical points of view. In particular, it has applications to the design of thel.mal ducts of pl'opulsive devices for high speed aircraft. TI}ils poper col,sists of a prelimillary "study Of limiLing'heating for the;(jfole case of a perfect gas in steady flow through a tube of unifornl cross section. It starts from tile fulldamelltal laws governing the gas now, fi-om which analytical condiLion for limiting heatillg is then derived, and the beavior of gas at exit as resulted. from limiting heating is discussed in some details. Among the conclusions thus obtained, it is interesting to notice that, as the result of limiting hear,ing the gas is leaving tile exiL with less temperature or velocit,y within certain ranges of initial Mach Number; and that sonic s'tate is 'the limiting state that could be reached by ally flow, subsonic or supersonic, t}lrough 11eat addition.

管内稳流气体之加热不能超过一定之限度,逾限即发生所谓限塞现象.在气体热动力学之理论与实际上,极限加热为一重要而饶有兴趣之问题.在现代高速度航空推进机热管部份之设计大多应用。本文试就极限加热作初步之分析:篇首先述气体流动之基本定律,由此以诱导加热限度公式,再由此讨论气体经过极限加热後之状态,并就气体加热前之流速分次声速(subsonic),声速(sonic)与超声速(supersonic)三种情况加以比较.在本文所得结论中,有值得吾人注意者即流动气体在某一速度范围之内其温度与速度反因加热而减低.此外声速状态(sonic state)为任何流动,(flow),不论是超声速底或次声速底,经加热後所能达到之极限状态,亦由本文根据极限加热之理论加以证明.在 paul Ghambre与林家翘两先生之“On the steady Flow of a Gas Through aTube with Heat Exchange orchemical Reaction”文中会有仝样之结论,共立论系从气体瞬间状态之分析入手,不涉加热限度.本文则从气体起始与终结状态间之关系着手,而以极限加热为讨论中...

管内稳流气体之加热不能超过一定之限度,逾限即发生所谓限塞现象.在气体热动力学之理论与实际上,极限加热为一重要而饶有兴趣之问题.在现代高速度航空推进机热管部份之设计大多应用。本文试就极限加热作初步之分析:篇首先述气体流动之基本定律,由此以诱导加热限度公式,再由此讨论气体经过极限加热後之状态,并就气体加热前之流速分次声速(subsonic),声速(sonic)与超声速(supersonic)三种情况加以比较.在本文所得结论中,有值得吾人注意者即流动气体在某一速度范围之内其温度与速度反因加热而减低.此外声速状态(sonic state)为任何流动,(flow),不论是超声速底或次声速底,经加热後所能达到之极限状态,亦由本文根据极限加热之理论加以证明.在 paul Ghambre与林家翘两先生之“On the steady Flow of a Gas Through aTube with Heat Exchange orchemical Reaction”文中会有仝样之结论,共立论系从气体瞬间状态之分析入手,不涉加热限度.本文则从气体起始与终结状态间之关系着手,而以极限加热为讨论中心.如与二氏原文参看可以相中互印证补充。

 
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