机载机柜的隔振设计

针对机载电子设备所处的振动环境,结合振动理论,阐述了一种机载机柜隔振设计的方法.该方法有助于提高系统的抗振能力.     

地感线圈在车辆通行自动检测控制系统中的应用

本文对基于地感线圈的车辆通行自动检测控制系统进行了研究。由于线圈电感量的变化,使得由三点式LC振荡电路构成的检测电路输出的波形频率发生变化,再经过波形整形电路送入单片机,单片机检测到频率变化来控制电机运转。采用这种方法可以使得当有车辆经过时,挡车器可以自动抬升档杆。而且当杆下有车辆时可以及时停止落杆,防止砸中车辆。具有较高的实用价值和应用前景。     

Theory Analysis of Model for Price Fluctuations in a Single Commodity Market

The price model for a single commodity market is a very important economic model that describes the basic rules for price fluctuations in a single commodity market. In this paper, we investigated the general case for the model, and proved that every positive solution is bounded and we obtained a necessary and sufficient condition for oscillation of every positive solution concerning positive state solution.     

广州降水与太阳活动及ENSO的关系

文章通过相关性计算得出,太阳黑子对广州降水的影响比南方涛动对广州降水的影响显著,相关系数分别为0．507和0．388,都通过了99％的显著性检验。同时,统计了1950年以来的ENSO事件,并与广州降水作了对应分析。得出结论,ENSO暖事件将使广州降水量减少;相反,ENSO冷事件则使广州降水量增加。     

A tabu search heuristic for redesigning a multi-echelon supply chain network over a planning horizon

This paper addresses the problem of redesigning a supply chain network with multiple echelons and commodities. The problem belongs to a comprehensive class of network redesign problems previously introduced in the literature. Redesign decisions comprise the relocation of existing facilities to new sites under an available budget over a finite time horizon, the supply of commodities by upstream facilities, the inventory levels at storage facilities, and the flow of commodities through the network. The problem is modeled as a large-scale mixed-integer linear program. Feasible solutions are obtained by using a tabu search procedure that explores the space of the facility location variables. The latter prescribe the time periods in which changes in the network configuration occur. They are triggered by the setup of new facilities, which operate with capacity transferred from the existing facilities, and by closing the latter upon their entire relocation. As the problem is highly constrained, infeasible solutions with excess budget are allowed during the course of the search process. However, such solutions are penalized for their infeasibility. Computational experiments on realistically sized randomly generated instances indicate that this strategic oscillation scheme used in conjunction with tabu search performs very well.     

基于质量摆动的供应链质量控制与协调研究

本文在供应商产品质量摆动的情况下,研究产品有缺陷的二级供应链的质量控制与协调问题,通过建立质量分散合作模式和质量集中决策模式,得出两者在合适的契约条件下可以达到相同效果,并给出了质量契约参数与双方的策略选择和终端质量水平的互动机制。结果显示：供应商的质量惩罚越严厉,制造商承担的顾客损失比重越大,线性转移支付的比例越低,终端产品的质量水平就越好。     

在位势对于一维双原子链晶格振动长光学模的影响

在简谐近似下,求解具有在位势的一维双原子链晶格动力学方程,得出并分析新的色散关系.讨论了具有在位势的一维双原子链晶格振动的高频支长波模振动图像.     

鼻炎电子治疗仪的设计及使用

研究目的是根据电子治疗仪引起的物理化学变化的特点,使经络疏通,气血调和,从而达到治疗鼻炎的目的,从理论上讲,它和传统针灸具有相同的效果。研究的方法用串通的针刺手法是＂捻转＂＂提插＂等,其实质就是产生一个生物电脉冲,并沿着经络向起所属脏腑器官传导,然后引起该器官植物神经发生反射,从而产生治疗作用,本治疗技术则是利用治疗仪直接在迎香穴上输入小电流脉冲信号刺激经穴。研究结果达到治疗和缓解鼻炎患者的痛苦。     

时标上一类非线性中立型微分方程的振动性

考虑了时标上一类非线性二阶中立型微分方程的振动性,获得了所有解振动及所有解的delta导数振动的充分条件。     

浅谈桥梁抗风设计

桥梁结构因风的作用而遭到破坏的事故屡见不鲜。风作用下桥梁结构的抗风性能己经成为影响其设计和施工的控制因素,结合结构风工程中己知的风的静力、动力特性,研究了桥梁结构在风的作用下的静力及动力响应的主要形式,为其进一步的研究提供了理论基础。