ADMC401控制器的PWM产生原理与应用

介绍了美国模拟器件公司推出的用于电机控制的高档DSP控制器ADMC401芯片,分析了其结构以及控制外设,阐述了ADMC401控制器的PWM产生原理和编程方法.并给出了具体的应用实例.     

美国企业年金发展动态及其启示

面对人口老龄化趋势,世界上的发达国家普遍建立了企业年金制度。美国产业界举办企业年金有100多年的历史,其典型运作模式———401(k)计划在近20年中占主要地位。研究美国企业年金制度、重点考察401(k)计划的形成、发展以及随着客观环境变化产生的矛盾运动,对于经济转轨条件下的我国企业年金建设有重要的借鉴作用。     

Overcoming Inertia: Do Automated Saving and Investing Strategies Work?

Many workers do not take advantage of savings opportunities provided to them at their workplace, nor do they always make wise investment decisions regarding employer plans. Various automated strategies have been implemented by employers with the objective of increasing retirement plan participation and, hence, the financial security of workers. Automatic strategies work by proactively arranging some type of action (e.g., plan enrollment) to occur unless people specifically opt out. This article examines and synthesizes previous empirical research about five automatic savings and investing strategies: (a) automatic retirement savings plan enrollment, (b) automatic contribution increases, (c) automatic portfolio rebalancing, (d) automatic rollovers, and (e) automatic investment plans. Advantages and disadvantages of each strategy are discussed, along with implications for financial educators.     

Is automatic enrollment consistent with a life cycle model?

We examine retirement saving for young adults in a life cycle model. We find that optimal retirement saving is zero for liquidity-constrained young adults who anticipate significant earnings growth. With a plausible age-earnings profile for college-educated workers, retirement saving does not begin until the late 30s or early 40s. Workers facing a flat earnings profile begin saving much sooner. Participating may be optimal for younger workers facing steep earnings profiles if they anticipate switching jobs and cashing out after 1–2 years. Our results suggest that automatically enrolling workers, regardless of age, is not consistent with a life cycle model.     

ADMC401控制器的PWM产生原理与应用

介绍了美国模拟器件公司推出的用于电机控制的高档DSP控制器ADMC401芯片,分析了其结构以及控制外设,阐述了ADMC401控制器的PWM产生原理和编程方法.并给出了具体的应用实例.     

企业年金税收优惠问题的探讨

企业年金作为社会养老保险体系的三大支柱之一,在我国开始发展并日益受到关注,但目前我国企业年金税收优惠政策的非完备性、非立法性从根本上制约了其规模的发展。本文介绍了有关企业年金的税收优惠政策的理论基础以及西方发达国家企业年金的税收优惠政策实践经验,分析了我国目前企业年金税收优惠政策的现状,并在此基础上提出了出台我国企业年金税收优惠政策的若干建议。     

美国401（k）计划的历史演进与政策变化

美国企业年金计划的税收和退休政策的变化，导致401（k）计划的形成与发展。本文从企业年金计划的发展历程和政策变化的视角，探讨美国401（k）计划发展与政策变化的内在本质。