This study builds upon the traditional ecological footprint model by adding two new accounts of resource flows and using two new calculating method. This first account concerns water resources and accounts for water consumption in cities. The second account tracks basic types of pollutant accounts. Energy theory and net primary productivity were used to calculate the ecological footprint. Aiming at the problem of application in city, a city hectare spatial scale was used and a regional carrying capacity correction parameter was referenced. This framework provides insight into calculations of the bearing capacity of certain areas. The Wuhan City Circle was used as a case study with the objectives of calculating the ecological footprint and regional carrying capacity and analyzing its spatiotemporal evolution and capacity for sustainable development. The results indicated that from 2000 to 2015, the average annual rate of decline of the carrying capacity of the Wuhan City Circle was 9.18%, and from 2015 to 2017, the average annual rate of increase was 38.91%. The ecological footprints of fossil energy and build-up land accounts increased over the years, exposing problems with land and energy utilization in the Wuhan City Circle. The continuous decline of the water resources carrying capacity reminds policy makers to pay attention to the protection of water areas. These results can help policy makers integrate historical data to adjust existing plans and make more specific future plans.

以长江中游城市群武汉城市圈为例,基于改进的生态足迹模型,计算得到3个时期(2000、2010、2017年)武汉城市圈的人均生态足迹及生态承载力,分析其不同阶段的承载力状况时空分布特征.结果 表明:2000～2017年,城市圈生态承载状况在不断恶化.在2000年城市圈雏形形成时,仅有潜江市和天门市的承载力状况处于生态赤字状态;在2010年城市圈迅猛发展后,武汉市进入生态赤字状态,承载状况与周围城市背离,产生吸聚效应,其他城市生态盈余也大幅下降;2017年城市圈正式进入初级阶段,武汉市影响逐渐向外辐射,产生发散效应,城市圈联合承载雏形形成,但4座城市的生态赤字状况未得到缓解,武汉市人均区域承载力为-2.056 hm2/人,潜江市为-1.7878 hm2/人,仙桃市为-1.1823 hm2/人,天门市为-0.6301 hm2/人.建议在武汉城市圈的可持续发展规划中聚焦生态赤字问题,加强核心区域的区域统筹,推进产业结构调整和迁移.

武汉市北部黄陂区前川城区因城市发展需要,拟在院基寺水库增设取水口.由于工程选址在水库溢洪道附近,为分析取水口建成运行对溢洪道的影响,分别从工程建设前后溢洪道泄流能力变化和工程运行时溢洪道边坡渗流稳定两个方面进行研究,采用Flow 3D软件对工程建设前后不同泄流工况的流场进行建模并对比分析,应用Geo studio软件选取2处不利断面进行了边坡渗流稳定分析,结果表明工程建设前后溢洪道泄流流量变化小于1％且工程对泄流流场影响可忽略不计;若发生管道渗漏,溢洪道边坡最大水力坡降在规范允许范围内,且工程建设对溢洪道边坡渗流稳定影响较小,研究成果可供类似工程应用参考.

The design principles and methods for baggage rack of 200 km/ h multiple unit are presented. The advantages of modular design for baggage rack of multiple unit are discussed through the classification of baggage rack, the selection of materials and the structure design of parts. These can be used for references for extending the modular design in interior outfitting of railway passenger trains in future.

篮圈从高3.05米变为高2.05米,一个篮球的周长从78厘米缩小为67厘米,重量从665克降为480克,与篮球同时发生变化的还有乒乓球、软梯等健身器材和单双杠等体操器材以及田径器材等共12个项目.这是在2005年10月1日开始在全国实施的<中小学体育器材和场地>国家标准中明确规定的内容.这意味着我国的中小学生开始真正拥有同自己的身体条件相适应的体育器材和场地.

<正>根据第五次全国体育场地普查办公室提供的数据,在我国现有的850080个体育场地中,教育系统有558044个,占全国体育场地总数的65.6%;在教育系统中高等院校有28741个,占全国体育场地总数的3.4%,这个比例在庞大的全国大学生数量面前是太小了。无论是收费问题还是开放问题,高校体育