单片机及外围接口芯片的复位问题

8051单片机的复位引脚可编程接口芯片8155的复位引脚是连接在一起,还是各自独立、分别处理,在众多《单片机原理及应用》教科书上皆无明确交代,甚至错误地把8051和8155的复位引脚简单地连接而谬误天下,本文提出了质疑,并给出单片机及外围接口芯片的复位解决方案。     

OPTIMAL SHOUTING POLICIES OF OPTIONS WITH STRIKE RESET RIGHT

The reset right embedded in an option contract is the privilege given to the option holder to reset certain terms in the contract according to specified rules at the moment of shouting, where the time to shout is chosen optimally by the holder. For example, a shout option with strike reset right entitles its holder to choose the time to take ownership of an at-the-money option. This paper develops the theoretical framework of analyzing the optimal shouting policies to be adopted by the holder of an option with reset right on the strike price. It is observed that the optimal shouting policy depends on the time dependent behaviors of the expected discounted value of the at-the-money option received upon shouting. During the time period when the theta of the expected discounted value of the new option received is positive, it is never optimal for the holder to shout at any level of asset value. At those times when the theta is negative, we show that there exists a threshold value for the asset price above which the holder of a reset put option should shout optimally. For the shout floor, we obtain an analytic representation of the price function. For the reset put option, we derive the integral representation of the shouting right premium and analyze the asymptotic behaviors of the optimal shouting boundaries at time close to expiry and infinite time from expiry. We also provide numerical results for the option values and shouting boundaries using the binomial scheme and recursive integration method. Accuracy and run time efficiency of these two numerical schemes are compared.     

带式输送机利用托辊纠偏原理研究与分析

带式输送机具有结构简单、输送物料范围广泛、输送量大、运距长、对线路适用性强、装卸料十分方便、可靠性高、制造安装方便、能耗低,效率高的特点。因此应用广泛,市场巨大。随着带式输送机的优越性越来越明显,加之国际互联网的实现,又大大缩短了输送机的设计、开发、制造、销售的周期,使它更加具有竞争力。但是,带式输送机输送带跑偏始终是个难题,根据多年现场实践经验,通过对煤矿带式输送机利用托辊纠偏原理研究与分析,利用托辊可以有效的防止带式输送机输送带跑偏,取得了理想的效果。     

理工类院校国际经贸人才创新培养模式研究

面对严峻的就业形势,理工类院校国际经贸学生如何突出重围找到理想的工作、有效实现自己的人生价值,从人才培养模式存在的问题出发,在理工类院校国际经贸人才就业渠道与培养模式上进行研究与创新,立足培养社会急需的国际经贸人才,提出了一系列创新培养模式,配以多方向拓展就业渠道,使毕业生在激烈的市场竞争中能够脱颖而出。     

需求未知的配送车辆在线调度优化研究

将现实生活中经常遇到未来需求未知的车辆配送问题抽象为一个局内配送车辆调度的问题。首先利用复位策略分析得到配送车辆的竞争比为2k+f₍(x));然后利用在线问题与竞争策略的理论与方法对配送车辆、配送中心点以及需求点三者之间不确定的数量关系分别展开讨论,并计算出不同情况下各自的竞争比;最后以A公司的物流配送数据为例,对模型的可行性进行验证,解决了需求未知情况下配送车辆的在线调度问题。     

单片机自动拨号电路的设计

本文提出利用单片机实现自动拨号的方案， 并给出了详细的电路设计方法。它可用于家庭、办公室及仓库的安全报警     

Early evidence on balloon performance

Balloon loans have become increasingly popular in recent years. For this reason, it is important to understand their features, assess their potential risks, and monitor their early performance. This article focuses on these topics. The first section discusses balloon characteristics and mortgage choice. The second section discusses expected balloon performance. The third section provides an econometric model for monitoring current performance. The fourth and fifth sections describe the data and results, respectively. The final section summarizes the article and offers some concluding remarks. The fundamental conclusions are that (1) early balloon performance is slightly worse than expected (i.e., balloons are not matching fixed-rate performance prior to balloon reset dates); (2) balloon performance is, however, within the range expected over the full term of the loans (i.e., performance worse than fixed-rate performance, but better than ARM performance); and (3) balloons have important characteristics that help mitigate systematic risk.     

电话语音自动报警系统

提出利用电话网传递报警信息的方案，并给出了详细的电路设计方法。它可用于家庭、办公室及仓库的安全报警。     

The economy doesn’t need a reset,and neither does management theory

Policymakers, commentators, and academics have called for a Great Reset, a deep-seated overhaul of the organization of the global economy. Some suggest that management theory needs a reset of its own. We argue that Great Reset proponents fail to appreciate the power of markets to bring about desirable social outcomes and are overly sanguine about what governments can do to alleviate alleged market failures. These views also drive the increasing enthusiasm for stakeholder governance, an increased government role in innovation, and the call for new metrics for assessing outcomes, all part of the Great Reset narrative. And yet, concentrating more decision power in the hands of governments, implementing diffuse metrics, and diluting effective ownership can hamper the functioning of markets, encourage crony capitalism, and reduce the resources that are available for dealing with grand challenges. Existing management theory provides powerful tools for understanding the benefits and costs of alternative institutional arrangements; abandoning these tools will push management theory to the sideline in policy debates.