Matlab与高级编程语言在科学计算中的联合运用   总被引：2，自引：1，他引：1  

高立峰  陈飞  胡光武  殷翔  沙宏武 《地震地磁观测与研究》2007,28(2):111-114

在数字地震观测、地震预报及地震工程研究中,Matlab作为一套功能强大的科学计算及数学分析软件,得到广泛的应用.本文介绍如何将Matlab高效的数值计算和分析能力与高级编程语言结合的方法.  相似文献   

如何提高磁照图数字化的精度     

高立峰  陈晓明  陈飞  胡光武  殷翔  沙宏武 《地震地磁观测与研究》2007,28(4):32-34

CBMD是一款针对CB-3模拟磁照图进行数字化处理的软件,利用专业图像处理技术,对模拟磁照图进行数字化,由于模拟仪器调试及存放因素造成了图纸状况不尽相同,使用者在数字化处理过程中,根据不同的图,纸采用相应的方法进行处理,才能保证数字化结果精确度.本文就主要的几种影响处理精度的情况展开讨论,并提出具体的解决方法.  相似文献   

旅游地传统饮食文化原真性感知对满意度与行为意向的影响——以宏村臭鳜鱼为例     

莫宏伟  尹寿兵  刘云霞 《热带地理》2022,42(11):1918-1930

在区分地方饮食与传统饮食概念的基础上,选择宏村传统饮食臭鳜鱼作为研究对象,通过对就餐环境、服务、食物3个原真性维度和满意度与行为意向2个维度,构建Amos结构方程模型,探究游客对传统饮食文化的原真性感知及其对旅游地就餐满意度和行为意向的影响。结果显示,3个维度的原真性均对满意度呈显著、直接、正向影响,对行为意向呈显著、间接、正向影响;其中,环境原真性对就餐满意度影响最大,其次为服务原真性,最后为食物原真性。研究认为,即使体验对象是与原真性关联紧密的传统饮食,大众游客仍更关注整体就餐环境和服务氛围,食物本身对满意度的影响最低。游客需求引发传统饮食文化舞台化重塑,并呈现“去传统化”与“去地方化”特征,旅游地饮食文化塑造对环境的关注大于食物,但当地居民更加关注食物本身的口味,主客关注差异和食物生产过程的游客需求导向引发当地居民对舞台化饮食的认同度降低。未来旅游地要充分考虑传统饮食的特殊性,重塑让游客与本地居民更加满意的饮食文化。  相似文献   

Understanding the dynamical-microphysical-electrical processes associated with severe thunderstorms over the Beijing metropolitan region     

Xiushu QIE  Shanfeng YUAN  Zhixiong CHEN  Dongfeng WANG  Dongxia LIU  Mengyu SUN  Zhuling SUN  Abhay SRIVASTAVA  Hongbo ZHANG  Jingyu LU  Hui XIAO  Yongheng BI  Liang FENG  Ye TIAN  Yan XU  Rubin JIANG  Mingyuan LIU  Xian XIAO  Shu DUAN  Debin SU  Chengyun SUN  Wenjing XU  Yijun ZHANG  Gaopeng LU  Da-Lin ZHANG  Yan YIN  Ye YU 《中国科学:地球科学(英文版)》2021,64(1):10-26

The Dynamical-microphysical-electrical Processes in Severe Thunderstorms and Lightning Hazards(STORM973)project conducted coordinated comprehensive field observations of thunderstorms in the Beijing metropolitan region(BMR)during the warm season from 2014 to 2018.The aim of the project was to understand how dynamical,microphysical and electrical processes interact in severe thunderstorms in the BMR,and how to assimilate lightning data in numerical weather prediction models to improve severe thunderstorm forecasts.The platforms used in the field campaign included the Beijing Lightning Network(BLNET,consisting of 16 stations),2 X-band dual linear polarimetric Doppler radars,and 4 laser raindrop spectrometers.The collaboration also made use of the China Meteorological Administration’s mesoscale meteorological observation network in the Beijing-Tianjin-Hebei region.Although diverse thunderstorm types were documented,it was found that squall lines and multicell storms were the two major categories of severe thunderstorms with frequent lightning activity and extreme rainfall or unexpected local short-duration heavy rainfall resulting in inundations in the central urban area,influenced by the terrain and environmental conditions.The flash density maximums were found in eastern Changping District,central and eastern Shunyi District,and the central urban area of Beijing,suggesting that the urban heat island effect has a crucial role in the intensification of thunderstorms over Beijing.In addition,the flash rate associated with super thunderstorms can reach hundreds of flashes per minute in the central city regions.The super(5%of the total),strong(35%),and weak(60%)thunderstorms contributed about 37%,56%,and 7%to the total flashes in the BMR,respectively.Owing to the close connection between lightning activity and the thermodynamic and microphysical characteristics of the thunderstorms,the lightning flash rate can be used as an indicator of severe weather events,such as hail and short-duration heavy rainfall.Lightning data can also be assimilated into numerical weather prediction models to help improve the forecasting of severe convection and precipitation at the cloud-resolved scale,through adjusting or correcting the thermodynamic and microphysical parameters of the model.  相似文献   

Paleoenvironmental implications of the guano phosphatic cementation on Dongdao Island in the South China Sea     

Xiao-Dong Liu  Li-Guang Sun  Zhong-Qi Cheng  San-Ping Zhao  Ke-Xin Liu  Xiao-Hong Wu  Zhou-Qing Xie  Xue-Bin Yin  Hong-Hao Luo  Xing-Fang Ding  Dong-Bo Fu  Yu-Hong Wang 《Marine Geology》2008,247(1-2):1-16

The phosphatic cement in the bioclastic sediment sequence on the northeastern shore of Dongdao Island in the South China Sea was studied and its paleoenvironmental implications discussed. Petrological characteristics and major, trace, REE element data unequivocally supported the notion that phosphatization was closely associated with avian guano decomposition and leaching, whereas carbon and oxygen isotope results further revealed that meteoric water were involved in these processes. AMS ¹⁴C dates on the brown phosphate cements indicate that they were formed around 5700, 5000–5100 and 2900 yr BP, respectively. The multi-episodes of phosphatization very likely correspond to intermittent seabird occupation on this island — possibly reflecting Holocene sea-level oscillation and/or long term climate changes in the South China Sea that have controlled seabird habitat. The phosphate cementation, which occurs widely in tropical islands, may be another useful monitor for sea-level and/or paleoclimate changes.  相似文献   

东营市东营区努力开创土地开发整理工作新局面          下载免费PDF全文

尹鹏飞  段存国  王越  王军 《山东国土资源》2008,24(2):49-50

东营区是黄河三角洲中心城市一东营市的中心区,我国第二大油田一胜利油田所在地.近年来,东营区随着城市化进程的加快,建设用地不断增多,保持耕地总量动态平衡压力很大.为确保全区耕地总量动态平衡,东营区创新机制,规范管理,积极探索增加耕地的有效途径,取得了显著成效.1999年以来,全区非农业建设占用耕地551.6 hm2,而同期增加有效耕地3 660.22 hm2,实现了耕地总量的动态平衡.  相似文献   

矿产资源开发整合与区域矿业经济发展浅析——以潍坊市滨海新区卤水资源为例          下载免费PDF全文

张婧  张全健  李霞  尹斌 《山东国土资源》2008,24(7)

对矿产资源开发进行整合是集中解决矿山布局不合理,实现规模化、集约化开发的重要手段,是调整矿业结构、促进矿业经济增长方式转变的有效途径。潍坊市滨海新区通过对卤水资源进行整合,初步实现了卤水资源的规模化开采和集约化经营,并在培育矿业龙头企业的基础上,注重矿业产业链的延伸和完整化,构建生态海洋化工产业集群,从而形成比较优势和核心竞争力,促进区域矿业经济发展。  相似文献   

Dynamics and relationships of Ca, Mg, Fe in litter, soil fauna and soil in Pinus koraiensis-broadleaf mixed forest   总被引：1，自引：0，他引：1  

Bo Song  Xiuqin Yin  Yu Zhang  Weihua Dong 《中国地理科学(英文版)》2008,18(3):284-290

The Liangshui Natural Reserve in Heilongjiang Province of China was selected as the study area. The authors collected the samples of forest litter （Tilia amurensis, Fraxinus mandshurica, Pinus koraiensis, Acer mono, Betula costata, and mixed litter）, soil in humus horizon （0--5cm） and soil horizon （5-20cm）, and soil macrofauna （Oligochaeta, Geophiloporpha and Juliformia） from 2001 to 2002. The role of soil macrofauna in the material cycle was analyzed through comparing the macro-element contents among various parts of the subsystems and using enrichment index （El）. The results indicate that dynamic changes of various litters are very complicated. The contents of Fe in each kind of litter increase firstly, and then decrease in the study period. The changes of macro-element contents are greater in the broad-leaf litter than in the coniferous litter, and the mixed litter is in the middle level, but the differences among them are not significant. The contents of Mg and Fe in humus are higher than those in soil, but the contents of Ca in soil are higher than that in humus. The dynamic changes of macro-element contents in soil and soil fauna are not consistent with those in litter. The diplopod presented obvious enrichment of Ca and Mg （E1〉1）, but it does not significantly enrich Fe. Earthworm has a stronger enrichment ability of Fe than diplopod and scolopendra, but E1〈1. Soil fauna can make great influences on the material cycle of the subsystems.  相似文献   

A combined model of wind, wave, tide and storm surges     

Xie Qiang  Hou Yi-jun  Yin Bao-shu  Fan Shun-ting  Cheng Ming-hua 《中国海洋湖沼学报》2000,18(4):297-300

A combined numerical model of wind, wave, tide, and storm surges was built on the basis of the “wind field model in limited sea surface areas”. When used to forecast the sea surface wind, wave height and water level, it can describe them very well. Contribution No. 4108 from the Institute of Oceanology, Chinese Academy of Sciences. This work supported by Stress Project (KZ952-S1-420), Chinese Academy of Sciences; 863 Project (863-818-06-05), and (863-818-Q-07)  相似文献   

新疆拜城黑孜尔水库垂直形变观测与现今断层活动特征     

尹光华  蒋伯军  葛鸣 《大地测量与地球动力学》2000,20(2):66-71

根据跨断层定点水准、基线观测资料和垂直形变的水准高程观测数据分析,黑孜尔断裂 Ｆ２定点水准的垂直位移量为 ０． １４ ｍｍ／ａ,基线缩短量为 ０． ４８ ｍｍ／ａ,断层滑动角■≈３７°,现今垂直形变速率为 ０． ６９３ ｍｍ／ａ。结合地震活动和区域地质构造研究,认为黑孜尔断裂近期水平活动强度大于垂直运动强度,该区在未来１～３年内仍可能发生６级以上地震。  相似文献