重庆市山区公路雪灾等级划分及预警评估模型研究

通过对国内外相关领域雪灾等级的分析,结合重庆气象条件和公路网的实际情况,提出适合重庆的山区公路雪灾分级标准。将雪灾强度数学模型与雪灾等级划分情况相结合,用动态聚类法找出各雪灾等级的重心,从而建立雪灾预警评估模型。     

集中式生活区再生水回用水质问题与对策

该文首先分析了集中式生活区再生水回用现状和前景。接着,针对再生水回用问题进行探讨,对再生水回用处理方式进行研究。重点针对铁锰和微生物指标的去除问题进行论述,对系统设计所需考虑的因素提出建议。     

冰雪路面通行能力衰减分析

道路通行能力是道路的一种性能,是度量道路疏导车辆能力的指标。在冰雪路面条件下,由于车辆制动性能的显著降低及冰雪给驾驶员带来的心理变化,道路通行能力受到很大限制。经计算分析,冰雪路面通行能力只有正常路面的25%～50%。     

高速公路除雪技术探讨

及时地清除冰雪,保障冬季高速公路的安全、畅通,是高速公路养护部门的一项非常重要的工作。从提高除雪效果、降低环境污染、减少行车事故损失的角度,论述了采用新型除雪剂的意义,结合使用经验介绍了新型除雪剂的性能、喷洒方法和应用效果,并对经济效益和社会效益进行了分析。     

A Novel Automatic Method for Removal of Flicker in Video

Intensity flicker is a common form of degradation in archived film. Most algorithms on this distortion are complicated and uncontrolled. This paper presented a discrete mathematical model of flicker, designed a block-based estimation method of the model＇s parameters according to their features of intensity variation in large area. With this estimation result it constructed a compensation model to repair the current frame. This restoration approach is full automatic and the repair process of current frame does not need the information of frames behind it. The algorithm was realized to establish a simple and adjustable repair system. The experimental results show that the proposed algorithm can remove most intensity flicker and preserve tho wanted effects.     

江西省高速公路冰雪灾害应急对策

为制定江西省高速公路冰雪灾害应急对策,基于高速公路冰雪灾害特点,系统阐述了高速公路冰雪管理目标,并提出了防治冰雪处治策略。     

极端冰雪条件下边坡稳定性分析

极端冰雪天气可能造成边坡的稳定性下降。结合算例,分析了极端冰雪天气发生时,各个工况下边坡的稳定性。首先研究了气温开始下降时,边坡内部温度分布规律,并考虑冻融界面的强度损伤,计算了表面土体冻结时边坡的安全系数。接着,针对边坡融化过程,分析了坡面土体部分融化及全部融化后边坡的应力状态,孔隙水压力分布及安全系数。结果表明,边坡开始冻结和融化时,都能造成边坡的稳定性下降,但其发生原因和机理略有不同。     

挡雪墙对铁路风吹雪雪害的防治

通过铁路风吹雪雪害的调查分析,结合挡雪墙防治雪害的实践经验,分别阐述了风吹雪雪害的形成机理,危害程度的影响因素,挡雪墙防治雪害的作用原理与设置原则,并对铁路风吹雪雪害的防治措施进行了分析。     

不同因素对公路用撒播融雪剂碳钢腐蚀影响的试验研究

融雪剂是道路常用的除冰雪方式,然而融雪剂对钢铁有一定的腐蚀作用,为了研究不同因素对融雪剂碳钢腐蚀的影响,试验分别研究了融雪剂溶液浓度、溶液配置方式、挂片旋转速度、不同水质和钢片对碳钢腐蚀率的影响。结果表明:在5%～15%浓度范围内,碳钢腐蚀率影响受融雪剂浓度影响较大,超过15%时,融雪剂浓度对碳钢腐蚀率影响较小,碳钢腐蚀率趋于稳定,且融雪剂浓度越大,碳钢腐蚀率越小;融雪剂中缓蚀剂的释放影响碳钢腐蚀率,不同试验方法对缓蚀剂的释放影响不同,机器高速搅拌对缓蚀剂释放更为有利;挂片旋转试验方法可以保证试片与溶液接触的均匀性,相较于静置试验,碳钢腐蚀率更高;碳钢腐蚀率的结果大小很大程度上取决于钢片的好坏,因此要严格控制钢片的质量。     

Development and prospects of key technology for submarine atmospheric environment control北大核心CSCD

Air regeneration, harmful gas purification and atmospheric composition monitoring are the key technologies of submarine atmospheric environment control systems. After years of development, China has made great progress in such systems, which have developed from ensuring the safety requirements of submariner and equipment operation to ensuring the health of submariner and reliability of system for long-term underwater operation. This paper reviews the development history of submarine atmospheric environment control technologies and introduces their future development prospects. The developers of integrated atmospheric environment control technology should learn from foreign submarine and aerosphere equipment technologies, which aim to support long-term submerged operation and comfort demands, and better adapt to future submarine technology development and evolving mission, in order to constantly enhance the level of submarine cabin air quality of the Chinese navy. © 2022 Journal of Clinical Hepatology. All rights reserved.