浅谈铁路建设对怀化经济发展的影响

在经济全球化深入发展、区域竞争日趋激烈的今天,作为经济发展硬环境构成要件的交通基础设施,已成为影响一个地区经济发展的重要因素。怀化被誉为"火车拖来的城市"。交通尤其是铁路在城市的形成和发展过程中发挥过不可替代的作用。在"十一五"新一轮发展中,作为内陆山区的怀化,仍需坚持交通先行,把交通建设摆到重要位置全力加以推进。     

论《诗经》中的酒器描写

《诗经》时代饮涵蔚为风气,酒具器皿也就精关多样,从盛酒之器尊、壶、鲁、觥、卣、缶、瓶到温酒之器爵、聋,从舀酒之器斗、匏、瓒到饮酒之器爵、觚等等,凡饮酒过程所需器皿都有所描写。《诗经》形形色色的酒器描写反映出了当时的酿酒业和手工业的发达,它标志着时代的文明与进步,体现着当时人特定的审美意识和文化心理。同时也折射出了绚丽的民俗文化风貌、政治社会风尚及其等级尊卑的人伦意识。透过它还可以想见其工艺之精美,甚至依稀可见先秦时代活泼生动的生活场面。     

对一种新型探测器蒙特卡罗方法模拟验证

介绍了用蒙特卡罗方法模拟光子在一种新型用于总β测量的闪烁探测器中的输运过程,结果表明探测器能使γ本底降低一个数量级左右.     

Cyclic electron flow around photosystem I is required for adaptation to high temperature in a subtropical forest tree, Ficus concinna

Dissipation mechanisms of excess photon energy under high-temperature stress were studied in a subtropical forest tree seedling, Ficus concinna. Net CO2 assimilation rate decreased to 16% of the control after 20 of high-temperature stress, and thus the absorption of photon energy exceeded the energy required for CO2 assimilation. The efficiency of excitation energy capture by open photosystem Ⅱ (PSII) reaction centres (Fv'/Fm') at moderate irradiauce, photochemical quenching (qp), and the quantum yield of PSII electron transport (φPSII) were significantly lower after high-temperature stress. Nevertheless, non-photochemical quenching (qHP) and energy-dependent quenching (qE) were significantly higher under such conditions. The post-irradiation transient of chlorophyll (Chl) fluorescence significantly increased after the turnoff of the actinic light (AL), and this increase was considerably higher in the 39 ℃-grown seedlings than in the 30 ℃-grown ones. The increased post-irradiation fluorescence points to enhanced cyclic electron transport around PSI under high growth temperature conditions, thus helping to dissipate excess photon energy non-radiatively.     

基于矩阵式遗传算法的集装箱码头堆场空间资源分配优化策略

为解决堆场空间资源配置问题(Storage Space Allocation Problem, SSAP),以箱区到泊位运输距离最小为目标,综合考虑岸桥、场桥等因素,提出一种基于矩阵式遗传算法(Matrix Genetic Algorithm, M-GA)的集装箱码头堆场空间资源分配优化策略.该方法首先建立基于装卸作业面的堆场空间资源分配模型;然后运用MGA求解扩展后的SSAP;最后分析不同遗传策略对遗传算法（Genetic Algorithm,GA)性能的影响,并以上海张华浜码头的案例验证该方法的优越性.     

Skiing accidents in the past 15 years

For the last 15 years a statistical analysis of distances skied and of alpine skiing accidents has been performed in the Davos‐Klosters skiing area, a ‘closed’ skiing area, where every skier has to return from the top to the bottom station. Distance skied is measured by vertical drop in 10⁶ km determined by calculations from frequency surveys by lift‐operators. About 2.5 million km per season have been skied during the past years, a number remaining constant for the last 15 years. In the same time the requirement for rescue‐transports in this area has shown a decline of 46% to 288 transports per season due to a decrease of the number of injuries with initial immobilization. Therefore the so‐called transport‐quotient (one rescue‐transport per 10⁴ km of vertical drop skied) has decreased from its initial value of 4 to 1 per 10⁴ km. During the same time all winter sport injuries were analysed at the hospital of Davos. About 90% are injuries caused by alpine skiing resulting in a total of 17 246 alpine skiing injuries for the last 15 years. There is a great decline in the incidence of lower leg fractures with a contrary development of knee injuries. Today half of the lower leg injuries are knee injuries (280 knee injuries out of a total of 1250 alpine skiing accidents per season). There is a gradual increase of upper extremity injuries from 17% of all skiing injuries in 1972 to 35% in 1976. A Swiss multicentre study on skiing safety shows comparable injury patterns in other skiing areas. The average injury‐severity measured by several parameters is declining.

In a technical investigation of skiing equipment of 1072 persons who sustained an accident, only 32% had ski bindings with tolerable frontal release and 17% with tolerable torsional release. Parallel measurements of bindings of 600 non‐injured skiers gave the same alarming results. More research on the correlation between binding adjustment and knee injuries is needed.     

基于神经网络的集装箱码头泊位分配聚类分析

为充分利用港口既有的建设规模、提高经济效益,对集装箱码头的泊位分配进行研究.采用神经网络和聚类分析两种数据挖掘技术分析相关数据,得到相应的数据挖掘模型.先通过反向传播(Back Propagation,BP)神经网络分析各因素对泊位分配的影响程度,确定出主要因素;然后通过聚类分析中的两步聚类算法进行分析;最终制定集装箱码头泊位分配策略.该方法可为提高集装箱码头生产效率提供帮助.     

城市客运交通本科教学改革初探

城市客运交通是交通工程专业核心课程之一,主要研究城市客运交通系统规划设计、运营管理、公交专用道设置等内容。作为交通特色的高校青年教师,结合"公交都市"创建和华盛顿协议要求,对该课程教学改革进行了一些探索。     

秦汉蜀晋南朝的治边方略与云南通道开发

秦至南朝的800余年,是云南早期历史发展的关键时期。这一时期云南地区的主要通道先后开通,并经历了兴衰变化的过程。秦汉蜀晋南朝诸朝的治边方略,对云南通道的开发产生重要影响。本文收集相关的零散资料,阐述秦汉蜀晋南朝时期云南通道开发的情形,并分析秦汉蜀晋南朝的治边方略与云南通道开发的关系。     

现代通信实训平台建设与实验教学改革

针对现代通信实验发展的新趋势,构建了一套包括程控交换、光传输和网络通信在内的现代通信实训平台,并完成了相应的实验教学内容、实验教学方式等改革,很好的完善了整个实验教学体制和实验教学内容,为学生在电信系统及工程应用方面提供了完善的实践平台。