金属矿山硐室发生岩爆的数学判据的研究

近年来,金属矿山发生岩爆的事故愈来愈多,对预测此类岩爆的发生也日益重要。通过对金属矿山岩爆的分析,建立了一种岩爆与临界深度有关的数学判据,以此来判别金属矿山硐室中是否有岩爆发生,并通过实例验证了其可行性,对有效预测预防金属矿山岩爆的发生具有一定的参考意义。

变速泵供水(风)系统相似工况的数学判据及其应用

推导出一种全新的变转速泵供水(风)系统比例定律的相似准则条件判据,通过应用本判据,得出变速泵供风系统工况可看作是相似工况,而变速泵供水系统不为相似工况的结论。

关于保守力的数学判据

本文根据保守力作功的特征，并用数学推理的方法，得出一个普遍适用的数学判据，以准确判别保守力。

QMS数学模型的建立及整体运行的模糊数学研判

为综合评价企业的质量管理体系运行状况，本文针对ISO9001：2000版的特点，采用建立过程因素集，评价集，权重集的方式，建立QMS的数学模型，然后通过将审核得到的数据，转化为模型数据后进行综合分析，最后对企业的QMS运行状况作出明确评价。

Mechanical model for failure modes of rock and soil under compression

The failure modes of rock and soil under compression are complex phenomena that have not been explained in a mechanical perspective. However, large amounts of studies indicate that the failure modes of rock and soil samples can be categorized into eight types. In this work, the inner tensile stress and the dissipation and conversion of energy of rock and soil under compression are analyzed, then the effective conversion coefficient of energy is deduced, thus the tensile failure criterion of rock and soil under compression is established. Combined with the shear strength criterion of Mohr–Coulomb, a tensile joint shear strength criterion for rock and soil under compression is built. Therefore, a mechanical criterion model concerning the failure modes of rock and soil under compression is established and verified by tests. This model easily explains the test results in the existing literature and many natural phenomena, such as collapse.

浅析同步电机自励磁数字仿真算法及其推论

通过同步电机基本方程式导出自发励磁的状态空间方程,给出数字仿真计算步骤和计算流程框图,并推导产生同步电机自励磁的条件及数学判据,最后用分析法讨论几种特殊情况下的自励问题。