A Study on the Spectral Form of Nearshore Water Waves

- The spectral form of wind waves is investigated based on the ocean wave data observed at three nearshore stations of Taiwan. In this study, the generalized forms of Pierson-Moskowitz spectrum and JONSWAP spectrum are used to describe the local wave spectrum by selecting suitable spectral form parameters. It is shown that, at a specific site, the similarity of wave spectral form exists. Thus it is possible to use a representative spectral form for a given nearshore region to describe the wave spectrum at this nearshore. On the other hand, the effects of relative water depth on spectral form are examined. The feasibility of two spectral models in finite water depth is evaluated by using the same field wave data.     

Carbon emission mitigation through regulatory policies and operations adaptation in supply chains: theoretic developments and extensions

Along with carbon emission regulations launched by governments and consumers’ rising concerns about climate changes and global carbon footprint, interests of academia and industry have risen in carbon-efficient supply chain management. This research focuses on some product supply chain to make a literature review-based investigation on proposing a theoretical framework. We also solve potential research issues of how diverse carbon emission regulations can work on supply chain performance as well as emission; in what way we can find coordination mechanisms and optimal policies for supply chain operations to abate emission and enhance system profitability within different scenarios; and also to evaluate the effect on emission reduction for each emission regulation aforementioned through comparing their associated supply chain performances and system emission. Both practitioners in industry and academia might find this study useful, as it generates concepts with a formal framework of potential and values theoretical issues in the emerging field of carbon-efficient supply chain management which combines carbon emission regulations with mature operation management to enrich the theory of supply chain management. This study is perhaps to be valuable and constructive both for operational decisions in firms and for the enactment as well as implementation of emission-reduction regulations. This study should activate further potential researches.     

Quantitative Analysis of Micro-structural Changes in a Bituminous Coal After Exposure to Supercritical CO2 and Water

Natural Resources Research - High-volatile bituminous coal samples were reacted in deionized water with supercritical CO2 (ScCO2–water) under simulated in situ pressure and temperature...     

铈硼硅石的微量化学分析法

铈硼硅石是一种罕见的稀土矿物,由于它含有某些化学性质近似的元素,故分析难度较大。本文研究了应用纸色层法和离子选择性电极法对铈硼硅石中某些主要成分和微成分的分离和测定条件,设计了较合理的铈硼硅石微量全分析流程。该流程也适合类似矿物的分析,与常法比较,本法具有快速、准确、成本低和用样少等优点。     

山西省层状云飞机云物理观测试验结果分析

利用山西省2008年-2010年64架次云结构的粒子测量系统（DMT）探测资料,配合地面观测和卫星资料统计分析了层状云系的宏微观特征。发现：降水性层状云低云含水量垂直方向上平均为0．03g,m^3,中云含水量垂直方向上平均为0．05g／m30对比分析降水云和非降水云系的微物理特征量,两者存在显著的差异,降水性层状云云粒子有效半径要达到10μm-14μm。对云系不同温度层的微物理特征和云中水分按不同粒子尺度的分配特征进行了对比分析,结果表明：降水性层状云在垂直方向上的微物理结构特征非常明显,也是分层的。高层主要是冰相粒子,主要是冰雪晶,随高度降低冰雪晶的尺度增大,在四个典型温度层的观测中,LWC、云粒子及降水的浓度、尺度相较有很大不同。云中水分按不同粒子尺度的分配可以看出,直径20μm、30μm的粒子含水量较高,对云中液态水含量的贡献较大,降水粒子主要由20μm、30μm的粒子转化。     

菌藻共固定化降解微囊藻毒素

研究了微囊藻毒素降解菌S3和椭圆小球藻L1共固定化后,对微囊藻毒素(MC-LR)的降解作用.结果表明,共固定化藻菌体系比单独固定化菌对MC-LR有更好的降解效果,共固定的藻可促进降解菌S3的生长.固定化细胞对毒素的降解能力较稳定,受环境温度和pH变化的影响较小,重复使用仍可维持较高的降解活性.     

固城湖冬季生物资源现状及环境质量与资源利用评价

根据1999年冬季对固城湖生物资源现状的调查,分析了固城湖冬季生物资源的群落组成和结构特征,探讨了固城湖水质的演变趋势和湖泊供养殖能力.结果表明,固城湖水质虽达到国家Ⅲ类饮用水标准,但固城湖水质已呈现明显的富营养化趋势.当前固城湖可自然提供的渔产潜力约为81.4×104kg.为保障固城湖渔业生产和水资源质量,应做好水生植物资源改良和保护,调整湖泊渔业结构.     

深海多金属硫化物开采作业安全与环境影响分析及对策研究

随着各国对深海多金属硫化物勘探与开发的步伐逐渐加快,为确保并指导承包者在区域内开采多金属硫化物作业安全且符合保护环境规定,首先论述开采深海多金属硫化物的工艺技术,以此为基础结合加拿大鹦鹉螺和美国海王星矿业公司试采多金属硫化物案例,分析其作业过程所涉及的硫矿泄漏、结构失效、机械伤害、火灾爆炸等安全问题和破坏海底动植物群及其栖息地、排放采矿废水尾矿等环境影响,最后就作业安全与环境影响问题分别给出了针对性的对策与建议,可为工程实践提供参考。     

典型煤炭矿区生态健康遥感诊断

煤炭资源是我国重要的一次性能源,科学监测与评估矿区生态健康,对于维持经济发展与生态健康的平衡至关重要。本文选取位于山西省的3处典型煤炭矿区,基于2001—2021年的Landsat遥感数据,利用目视解译方法对露天矿区进行了多年用地类型演变格局分析;并分别对3处典型矿区的绿度、湿度、干度、热度进行了估算,应用知识粒度熵的权重计算方法,综合构建了矿区遥感生态指数(RSEI),完成了矿区生态健康多年遥感诊断。结果表明,两处露天矿区呈现边开采边复垦的生产模式,各有半数的研究年份RESI区域均值达到0.5以上;地下矿区的开采工作基本不造成地上扰动,其2001年以来的生态健康状况较为稳定,RSEI均值在0.7上下浮动;3处矿区2021年的RSEI均值分别为0.53、0.48、0.70。本文改进了传统的遥感生态指数构建方法,为煤炭矿区的长时序生态监测与遥感诊断提供了科学支撑。     

Effects of fatigue on the physiological parameters of labor employees

Human factors have contributed to the causes of several accidents. The physiological parameters change law of labor employees before and after fatigue is researched in this paper. The purpose of this research is to find the relationship between physiological parameters and fatigue, design corresponding fatigue monitoring and early warning system, reduce the accident rate and optimize the working environment. The labor employees’ heart rate, RR interval, respiration rate and blood pressure under fatigue state are determined in the laboratory. The change law of labor employees’ heart rate, RR interval, respiratory rate and blood pressure are analyzed based on the paired samples t test by using SPSS software. The results show that labor employees’ heart rate and RR interval have no significant difference before and after fatigue. Labor employees’ respiration rate has significant difference before and after fatigue: the respiration rate decreased after fatigue. Labor employees’ blood pressure has significant difference before and after fatigue: blood pressure of labor employees after fatigue can be elevated. The results provide a richer theoretical and practical basis in what criteria are used to determine the fatigue. It has important significance in the safety management field and accident prevention.