简略寿命表的快速计算

目的:实现简略寿命表的快速计算。方法:利用Excel2000,输入、编辑、存储数据;利用VC++6.0设计用户操作界面及算法。结果:通过用户界面,实现对人员结构表的快速读入、死亡信息表的快速统计和简略寿命表的快速计算。结论:极大地提高了简略寿命表的编制速度,特别是当死亡信息表数据量巨大或数据频繁变动时,提速效果逾发显著。     

浅谈数据库读写操作中的"事务处理"

本文介绍了数据库操作中出现的一类常见问题,以及使用事务处理来解决类似问题的原理和方法.     

Accessing healthy food: availability and price of a healthy food basket in Scotland

Access to healthy food and its marketing have been asserted as limitations on changing behaviour to improve diet. A retailer survey in Scotland is reported that considered availability and affordability of a basket of indicator healthy food items, termed the Healthy Eating Indicator Shopping Basket (HEISB). It comprised 35 items drawn from 5 major food groups. A census of HEISB availability in 466 stores was undertaken in a sample of locations that varied on dimensions of urban-rural and affluent-deprived. Around half of the supermarkets surveyed stocked all the items. Availability of healthy food items was generally seen to be adequate but there were notable variations in availability for specific items. There were large variations in price for the HEISB items across the stores and the survey areas. The total HEISB median price varied by store type. Basket price tended to rise with deprivation with a caveat of the lowest prices in the most deprived areas. Accessibility to a range of healthy food depends more on the presence of medium and large stores than being in a deprived or affluent area.