液化天然气(LNG)储罐地基基础研究综述

阐述液化天然气(LNG)储罐地基基础的重要性和复杂性,将储罐地基基础分类归纳为天然地基筏板基础、复合地基筏板基础、低承台桩基础、双承台架空基础、高承台桩基础和双承台架空桩基础六种形式.总结各种基础形式的定义、结构构造及适用范围,并从安全性、经济性、适用性三个方面进行了对比.指出基础的抗震设计和协调变形控制是制约储罐地基...     

“交通运输方式和布局变化的影响”教学设计

本节的内容设计主要是依据新课改精神与迁安一中提出的＂三熟＂理念和高效课堂＂六环节＂教学模式。通过＂问题＂的形式开展教学,强化学生的＂问题＂意识和地理学习能力的培养。具体体现在：第一,运用地图（图表、资料等）的能力,即通过读图培养学生分析、说明、归纳的能力;第二,指导学生在新材料新知识情境下提取信息,实践联系理论的解题能力。     

中俄启动冰面测量

3月18日．中俄冰上运输委员会对黑龙江黑河段冰面进行测量．测量冰层结果显示最薄为67厘米．最厚为90厘米,符合安全运输标准。双方商定,3月24日各自测量本国冰道．如果测量结果达到安全运输标准．     

Formation and transport of intermediate water masses in a model of the Pacific Ocean

A basin-wide ocean general circulation model of the Pacific Ocean was used to investigate how the interior restoration in the Okhotsk Sea and the isopycnal diffusion affect the circulation and intermediate water masses. Four numerical experiments were conducted, including a run with the same isopycnal and thickness diffusivity of 1.0×103 m2/s, a run employing the interior restoration of temperature and salinity in the Okhotsk Sea with a time scale of 3 months, a run that is the same as the first run except for the enhanced isopycnal mixing, and a final run with the combination of the restoration in the Okhotsk Sea and large isopycnal diffusivity. Simulated results show that the intermediate water masses reproduced in the first run are relatively weak. An increase in isopycnal diffusivity can improve the simulation of both Antarctic and North Pacific intermediate waters, mainly increasing the transport in the interior ocean, but inhibiting the outflow from the Okhotsk Sea. The interior restoration generates the reverse current from the observation in the Okhotsk Sea, whereas the simulation of the temperature and salinity is improved in the high latitude region of the Northern Hemisphere because of the reasonable source of the North Pacific Intermediate Water. A comparison of vertical profiles of temperature and salinity along 50°N between the simulation and observations demonstrates that the vertical mixing in the source region of intermediate water masses is very important.     

Seasonal variability of the North Equatorial Current transport in the western Pacific Ocean

Seasonal variability of the North Equatorial Current （NEC） transport in the western Pacific Ocean is investigated with ECMWF Ocean Analysis/Reanalysis System 3 （eRA-S3）. The result shows that NEC transport （NT） across different longitudes in the research area shows a similar double-peak structure, with two maxima （in summer and winter）, and two minima （in spring and autumn）. This kind of structure can also be found in NEC geostrophic transport （NGT）, but in a different magnitude and phase. These differences are attributable to Ekman transport induced by the local meridional wind and transport caused by nonzero velocity at the reference level, which is assumed to be zero in the NGT calculation. In the present work, a linear vorticity equation governing a 1.5-layer reduced gravity model is adopted to examine the dynamics of the seasonal variability of NGT. It is found that the annual cycle of NGT is mainly controlled by Ekman pumping induced by local wind, and westward-propagating Rossby waves induced by remote wind. Further research demonstrates that the maximum in winter and minimum in spring are mostly attributed to wind east of the dateline, whilst the maximum in summer and minimum in autumn are largely attributed to that west of the dateline.     

基于GIS的广东省综合运输体系规划信息平台构建研究

广东省交通运输厅从2012年起,组织分期研究开发基于地理信息系统的广东省综合运输体系规划信息平台(简称"平台"),旨在建立健全统一的全省交通运输业数据采集、发布标准及技术管理规范,分别构建5大类运输方式线网及重要的运输枢纽站场节点的多级图层,叠加形成全省综合运输体系布局规划"一张图"。"平台"采用4层设计,依托后台管理、应用分析和综合展示3大子系统,搭建了基础地理信息、经济社会、交通运输现状、综合运输体系规划成果及其他共5大类数据库,"平台(一期)"于2014年3月26日通过验收,实现了多维度、多视角展示和查询交通运输业数据成果的预期功能。研究实践将力促综合运输体系规划研究和决策方式实行根本性变革。     

矿产资源运输通道概述

全球矿产资源垄断格局使得中国很多重要进口矿产资源来源较为集中,而中国对进口资源的运输通道控制力较弱,影响矿产资源供应安全。本文对中国矿产资源管道运输、海运及陆运进行了概述,分析目前存在的问题,并提出建议：开辟多元进口油气运输通道,加强科技创新,降低远距离运输安全风险;北极航线的开辟将使世界矿产资源贸易和战略格局产生重大调整;加快推进＂丝绸之路经济带＂和＂海上丝绸之路＂等。     

运输方式对马氏珠母贝(Pinctada fucata)稚贝存活率、生长、消化及抗氧化性能的影响探究

为优化马氏珠母贝苗种运输技术,提高运输效率,以马氏珠母贝(Pinctada fucata)稚贝为研究对象,分别以有水和无水两种运输方式汽运8 h条件下开展实验,比较分析其在运输前后、运输后恢复阶段的生长、消化和抗氧化性能。结果显示:有水运输后存活率达98%,无水运输97%;在恢复期第14 d,有水运输和无水运输存活率分别达97%、96%;有水运输皮质醇含量由(2 607.61±15.27)μg/L显著降低至(1 412.98±5.09)μg/L,无水运输后显著降低至(2 287.36±10.18)μg/L;在恢复期第7 d和14 d皮质醇含量均呈逐渐上升趋势;有水和无水运输后和恢复期淀粉酶活性不断上升,且有水运输酶活性高于无水运输(P<0.05),最高值为(1.43±0.05) U/mg prot;有水和无水运输后及恢复期超氧化物歧化酶酶活性在不断下降,最低下降至(16.00±0.14) U/mg prot,有水运输超氧化物歧化酶活性均高于无水运输(P<0.05);有水运输碱性磷酸酶、谷草转氨酶和谷丙转氨酶活性均上升,无水运输均下降;在恢复阶段,碱性磷酸酶活性在不断下降,谷草转氨酶和谷丙转氨酶活性在不断上升。有水和无水运输会对马氏珠母贝稚贝产生不同的影响,有水运输方式相对无水运输方式可使马氏珠母贝稚贝在后期阶段具有更好的存活效果和生长状态。     

鸡西市重拳严打非法盗采

本报讯 日前,鸡西市政府组织国土资源局、公安、国保大队、煤炭、安监等相关部门对全市重点地区非法开采、盗采小煤井行为进行了专项整治,共填埋炸毁各类非法开采小井口30余处,拘留40余人,依法扣押运输车辆一台、提升设备一台、电镐7把、电缆560米。     

广州市运输型物流企业空间分布特征分析

基于广州市3 040个运输型物流企业的空间属性资料,揭示广州市运输型物流企业的空间分布规律,剖析不同区域运输型物流企业的集聚机理。研究表明:①全市运输型物流企业空间分布特征是中心城区高度聚集、其它地区零散分布,呈现"三心一轴"的格局。②各个区域呈现不同分布格局,白云区是三纵一横一个中心,越秀区是均质分布,荔湾区和海珠区是零散分布,天河区是轴线分布基础上的小规模集聚,黄埔区、萝岗区是双集聚中心。③影响各区域分布格局的主要因素有:城区历史因素(地理位置、经济发展水平),交通基础设施因素(城市主干道),经济活动中心因素(商业、商务、工业园区),物流节点因素(机场、货运站场、批发市场),规划政策(物流规划)因素和土地因素。