一种管材内径、外径、壁厚在线检测系统

本义介绍了一种用于管材内径、外径、壁厚的在线检测系统，详细说明了其检测系统的结构组成，测量原理，硬件电路和软件设计。     

超声液位测量仪的研究

介绍探头贴底式超声液位检测原理和数据处理方法。根据仪表工作时各种随机干扰对检测信号影响大等特点，采用单片机将数据平滑方法用于液位检测信号数据处理中，有效地减小了各种随机噪声的影响。     

煤气管道壁厚检测传感器

提出了一种基于电磁式漏磁检测原理的传感器,用于煤气管道壁厚检测。介绍了漏磁法壁厚检测原理、传感器结构和工作原理,并通过实验进行了分析、验证。结果表明:传感器的工作原理是正确的,具有较高的检测准确度。     

基于容栅传感器和单片机的变形检测系统

文章介绍了基于容栅传感器和89C52单片机的位移检测系统的系统组成，重点分析了容栅数显卡尺信号转换原理及软件实现．该系统主要用于对结构的变形进行检测。     

XCOY—1型三电极一氧化碳检测报警仪的研制

文中介绍一种一氧化碳检测报警器，利用恒电位电解法原理制成的传感器，并配以最新电子元器件组成检测仪，用于对矿井，化工，煤炭，电力，冶金，环保等有关部门的一氧化碳检测。     

XCOY-1型三电极一氧化碳检测报警仪的研制

文中介绍一种一氧化碳检测报警器，利用恒电位电解法原理制成的传感器，并配以最新电子元器件组成检测仪。用于对矿井、化工、煤炭、电力、冶金、环保等有关部门的一氧化碳检测。     

几种电导式液位传感控制电路

介绍了几种应用电导液位传感原理的液位控制电路。可用于一切具有导电离子非易燃液体的液位测量与控制，具有控制灵敏，不腐蚀电极和体积小等特点，尤其地小型液槽的液位检测与保护。     

小波变换在电路故障诊断中的应用

介绍了利用小波变换来检测信号的奇异性特征的原理，对信号的奇异性进行了定义，并将其用于电路故障诊断中，解决了传统故障诊断方法中对故障存在的知识获取“瓶颈”问题。实验证明提出的方法取得了较好的应用效果。     

用于总线通信网的同步计数顺序争用多址接入技术

介绍一种新型的用于总线型通信网络的多址接入技术的工作原理，即同步计数顺序争用多址接入技术，该技术不需要检测冲突，具有性能稳定，容易实现等优点。     

微机械惯性传感器检测平台的设计与应用

一种用于微机械惯性传感器研制与开发的检测平台,介绍电容式惯性传感器微电容信号的检测原理、该系统的总体结构、各个组成部分的工作原理及自动检测方法。     

The Bellman-Gauss principle for constrained motion

Gauss' principle of least constraint is solved in a sequential fashion via dynamic programming in this paper. The solution itself constitutes a new principle for constrained motion, which we may name the Bellman-Gauss principle for constrained motion.     

基于影射·特征·知识的辨识复杂彩色目标的方法

以生命科学对人类视觉系统的长期研究成果为出发点,提出目标辨识四要素原则。并以此为基础,结合该领域前辈们研究的经验教训,努力在彩色机器视觉领域开拓一条新的思路,提出了一种满足目标辨识四要素原则的基于影射·特征·知识的辨识复杂彩色目标的方法。实验证明了该方法的正确性。     

免疫机制入侵检测技术中检测器漏洞的研究

分析了生物免疫系统的原理，并对基于免疫原理的入侵检测研究方法进行了介绍，特别介绍了检测器产生的否定选择算法并对检测器产生的漏洞进行了重点研究。     

Rational decision principle and social choice function

In this paper, we treat a social choice function as a decision principle and apply the concept of the rational decision principle to it. Then we derive the concept of the order rational decision principle. We show that the rational decision principle is suitable for an integral framework for a social choice, as well as for decision making under uncertainty and multiobjective decision making. We also show that some decision principles are considered to be models of Arrow's decision principle in a weaker sense.     

迭加原理及其在非线性流水线调度中的应用

文章提出了分析非线性流水线的迭加原理。证明了迭加原理公式的一般形式和递推形式。迭加原理可以方便地用来建立绘制非线性流水线无冲突调度状态图的规则。最后,讨论了一种特殊和重要的情形。     

Generalized maximum principle for optimal control of generalized state-space systems

This paper is mainly concerned with the derivation of the necessary conditions, called the ‘generalized maximum principle’, for the optimal control of generalized state-space systems with a more general form. By making use of a method of the modern calculus of variations which has been used for the proof of Pontryagin's maximum principle, the generalized maximum principle is derived, and some problems related to this principle are discussed in detail. In addition, an illustrative example is given in the light of this principle.     

Comments on “A new model for control of systems withfriction”

This paper provides a complete stability proof of Theorem 1 of the above-mentioned paper (Canudas-de-Wit et al., 1995) for the tracking and the regulation case. In the paper, the proof presented for Theorem 1 only holds for the regulation case where the LaSalle's invariant principle may be invoked. In the tracking case, the closed-loop system becomes a nonautonomous one, and arguments other than the LaSalle's invariant principle should be used. Here we present these arguments and show that Theorem 1 holds for both cases     

Robust and accurate viscous discretization via upwind scheme – I: Basic principle

In this paper, we introduce a general principle for constructing robust and accurate viscous discretization, which is applicable to various discretization methods, including finite-volume, residual-distribution, discontinuous-Galerkin, and spectral-volume methods. The principle is based on a hyperbolic model for the viscous term. It is to discretize the hyperbolic system by an advection scheme, and then derive a viscous discretization from the result. A distinguished feature of the proposed principle is that it automatically introduces a damping term into the resulting viscous scheme, which is essential for effective high-frequency error damping and, in some cases, for consistency also. In this paper, we demonstrate the general principle for the diffusion equation on uniform grids in one dimension and unstructured grids in two dimensions, for node/cell-centered finite-volume, residual-distribution, discontinuous-Galerkin, and spectral-volume methods. Numerical results are presented to verify the accuracy of the derived diffusion schemes and to illustrate the importance of the damping term for highly-skewed typical viscous grids.     

一类双向确定性系统最优控制问题的最大值原理

本文讨论了一类双向确定性系统的最优控制问题，我们利用Ｅｋｅｌａｎｄ变分原理，推得了最优控制所满足的最大原理。同时，对线性系统的情况，我们还证明了最大值条件的充分性。     

Robust non-parametric regression via incoherent subspace projections

Machine Learning - This paper establishes the algorithmic principle of alternating projections onto incoherent low-rank subspaces (APIS) as a unifying principle for designing robust regression...