腐植酸造粒粘合剂的研究

给出了用不同粘合剂制备颗粒状腐植酸的试验结果。研究表明，腐植酸钠作为造粒的粘合剂，具有良好的综合指标。当其加入量为腐植酸含量的４％￣５％时，颗粒状腐植酸制成品抗冲击指数达到８２％以上，磨损指数低于８．８％。     

空气离心式离合器主要结构参数的确定

以传递和扭矩和工作转速为设计条件，推导并建立了空气离心式离合器的承载能力方程式及其求解方法，并在此基础上提出了确定该种离合器主要结构参数的具体设计方法和步骤。使其更便于在实际中推广和应用。     

基于边界表示的曲面实体造型系统的数据结构

实体造型是ＣＡＤ系统的核心模块，而二次曲面在工程中常用来描述轴，孔及圆角等形状特征。讨论了在微机上实现的一个基于边界表示的实体模型的数据结构，并针对二次曲面的特点，实现了对自封闭曲面的无二义性拓扩定义，为顺利进行曲面的拼合运算打下了基础。     

水资源系统实时调度

对水资源系统实时调度的历史和发展进行了简要介绍，并对其结构模型和数学模型的形式进行探讨。     

面板堆石坝下游坝坡稳定可靠度分析

应用考虑条块间水平作用力的条分法，在非线性破坏准则的基础上，结合堆石面板坝的破坏模式，构造了完整的面板堆石坝下游坝坡稳定可靠度分析模型，并结合实例进行了计算．所得结果合理，表明该模型比较符合实际．     

磁介质涂层圆锥喇叭天线的设计方法

通过在圆锥喇叭内壁加磁介导涂层的方法，成功地设计了具有低副瓣、低交叉极化和方向图对称的喇叭天线。该磁介质涂层既是良导电体，又是良导磁体。通过选择合适的喇叭张角，该喇叭天线与波纹喇叭性能相同，而且比波纹喇叭设计简单。     

曲线顶管初探

本文对曲线顶管的最重要参数——最小曲线半径进行了探讨，得出最小曲线半径与管段长度、管径成正比，与木垫片厚度成反比的关系。另外还指出曲线半径还受土体承载力的制约，要防止管道在施工中发生纵向失稳。     

Robust Estimation of Rotation Angles from Image Sequences Using the Annealing M-Estimator

A robust method is presented for computing rotation angles of image sequences from a set of corresponding points containing outliers. Assuming known rotation axis, a least-squares (LS) solution are derived to compute the rotation angle from a clean data set of point correspondences. Since clean data is not guaranteed, we introduce a robust solution, based on the M-estimator, to deal with outliers. Then we present an enhanced robust algorithm, called the annealing M-estimator (AM-estimator), for reliable robust estimation. The AM-estimator has several attractive advantages over the traditional M-estimator: By definition, the AM-estimator involves neither scale estimator nor free parameters and hence avoids instabilities therein. Algorithmically, it uses a deterministic annealing technique to approximate the global solution regardless of the initialization. Experimental results are presented to compare the performance of the LS, M- and AM-estimators for the angle estimation. Experiments show that in the presence of outliers, the M-estimator outperforms the LS estimator and the AM-estimator outperforms the M-estimator.     

On chaotic simulated annealing

Chen and Aihara (1995) proposed a chaotic simulated annealing approach to solving optimization problems. By adding a negative self coupling to a network model proposed earlier by Aihara et al. and gradually removing this negative self-coupling, they used the transient chaos for searching and self-organizing, thereby achieving great improvement over other neural-network approaches to optimization problems with or without simulated annealing. In this paper we suggest a new approach to chaotic simulated annealing with guaranteed convergence and minimization of the energy function by gradually reducing the time step in the Euler approximation of the differential equations that describe the continuous Hopfield neural network. This approach eliminates the need to carefully select other system parameters. We also generalize the convergence theorems of Chen and Aihara to arbitrarily increasing neuronal input-output functions and to less restrictive and yet more compact forms.     

A novel integrated silicon capacitive microphone-floating electrode“electret” microphone (FEEM)

A novel principle “electret” microphone, i.e., floating electrode electret microphone, is proposed and implemented in this study. Single-chip fabrication and corrugation technique are used in the design and fabrication of the microphone. The floating electrode is encapsulated by highly insulated materials to ensure that there is no electric-leakage passage between the floating electrode and the electrodes of the microphone. Net-free electronic charges (not “bonded” charges as in traditional electret) in the floating electrode can excite the electric field, which is similar to that of the traditional electret. The floating electrode can be easily charged by use of the “hot” electron technique, available using the avalanche breakdown of the p⁺-n junction. Therefore, the electret microphone is rechargeable, which can greatly increase the lifetime of the device. The preamplifier has been on-chip integrated in a junction-field-effect transistor (JFET) source-follower type with resistors by use of ion implantation. Electret charges are banded in a deep potential trap, thus, this microphone can operate at a high temperature (as high as 300°C) and has high stability and reliability. Experiments show that the prototype has a 3-mV/Pa sensitivity and a larger than 21-kHz frequency bandwidth in a 1 mm ×1-mm diaphragm area. Microphone performance can be further improved by optimized process and design. The fabrication is completely integrated-circuit (IC) compatible, hence, the microphone shows promise in integrated acoustic systems