关于编制用海项目竣工验收测量技术规程的探讨          下载免费PDF全文

张加晋  杨顺良  马丹  任岳森  翁宇斌  罗美雪  孙芹芹 《海洋开发与管理》2016,33(3):83-88

文章针对当前填海竣工验收管理工作有管理办法但缺乏验收规范的情况,从科学意义和应用管理角度,提出编制用海项目竣工海域使用验收测量技术规程的迫切性和必要性,提出不仅需要对填海项目竣工验收制定验收技术规程,还应该对构筑物用海、海底管线用海等不同用海类型和方式特点,采用有针对性的竣工测量边界界定原则和竣工验收测量方法,分析误差限值建议说明,以期为沿海各省、市、自治区海域行政管理人员和竣工测量单位提供参考。  相似文献   

西藏班公湖—怒江成矿带与邻区铟矿化带的发现及意义   总被引：8，自引：0，他引：8  

赵元艺  刘妍  崔玉斌  吕立娜  宋亮  曲晓明 《地质论评》2010,56(4):568-578

铟是稀散金属元素,在地壳中的含量为0.1×10-6。我国铟的储量居世界第一,广西大厂矿田是我国重要的产铟基地。本文在大量的野外地质调查与室内分析测试与扫描电镜观察等工作的基础上,首次查明了西藏班公湖—怒江成矿带及邻区的铟含量与赋存状态。在铟含量较高的13个矿床(点)中,5个矿床(点)样品铟的平均品位达到伴生工业品位的要求。铟含量高的地质体呈带状展布,为我国一个新的铟矿化带,铟矿物种类为羟铟石、自然铟两种。铟含量较高的样品全部位于矽卡岩型矿床中。班公湖—怒江成矿带铟的矿化时代应为班公湖—怒江洋向南(即冈底斯地块)俯冲使之闭合后碰撞阶段所形成。当雄县拉屋多金属矿床正在开采,其铟含量平均为45.44×10-6,最高为166×10-6,需加强铟资源的评价,提高其资源的综合利用价值。  相似文献   

Effects of Microphysical Latent Heating on the Rapid Intensification of Typhoon Hato (2017)     

Zhao  Dajun  Yu  Yubin  Yin  Jinfang  Xu  Hongxiong 《Acta Meteorologica Sinica》2020,34(2):368-386

Journal of Meteorological Research - A 72-h cloud-resolving numerical simulation of Typhoon Hato (2017) is performed by using the Weather Research and Forecasting (WRF) model with the Advanced...  相似文献   

Petrogenesis and Tectonic Implications of the Early Triassic Nianzi Adakitic Granite Unit in the Yanshan Fold and Thrust Belt: New Constraints from U-Pb Geochronology and Sr-Nd-Hf Isotopes     

ZHANG Huijun  WU Chu  HE Fubing  WANG Biren  CUI Yubin  LIU Zhenghu  YOU Shin  DONG Jing 《《地质学报》英文版》2024,98(1):50-66

The Nianzi granite unit, which includes the Nianzi, Xiaolianghou and Xiawopu granitic intrusions, is a significant component of the northern part of the North China Craton (NCC) and is situated in the Yanshan fold and thrust belt (YFTB). However, there is still debate regarding the tectonic evolutionary history of the YFTB during the late Permian to Triassic period, specifically regarding the timing of subduction and collision between the NCC and the Paleo-Asian Ocean. The Nianzi granite unit exhibits unique petrological, geochronological and geochemical signatures that shed light on the tectonic evolutionary history of the YFTB. This study presents detailed petrology, whole-rock geochemistry, together with Sr-Nd isotopic, zircon U-Pb dating and Lu-Hf isotopic data of the granites within the Nianzi granite unit. Our findings demonstrate that the granites primarily consist of subhedral K-feldspar, plagioclase, quartz, minor biotite and hornblende, with accessory titanite, apatite, magnetite and zircon. Zircon U-Pb dating indicates that the Xiaolianghou granite was emplaced at 247.5 ± 0.62 Ma. Additionally, the adakitic characteristics of the Nianzi, Xiawopu and Xiaolianghou granitic intrusions, such as high Sr and Ba contents and high ratios of Sr/Y and (La/Yb)N, combined with negative Sr-Nd and Lu-Hf isotopes (87Sr/86Sr)i = 0.705681–0.7057433, εNd(t) = ?21.98 to ?20.97, zircon εHf(t) = ?20.26 to ?9.92), as well as the I-type granite features of high SiO2, Na2O and K2O/Na2O ratios, enriched Rb, K, Sr and Ba, along with depleted Th, U, Nb, Ta, P and Ti, suggest that the Nianzi granitic unit was mainly derived from the partial melting of a thickened lower crust containing hydrous, calc-alkaline to high-K calc-alkaline, mafic to intermediate metamorphic rocks. In light of these parameters, we further integrate our data with previous studies and conclude that the Nianzi granitic unit was generated in a post-collisional extensional environment during the Early Triassic.  相似文献   

内蒙古黄岗梁—孟恩陶勒盖矿带成矿地质特征及成矿模式     

冯建忠  艾霞  吴俞斌 《国土资源》1993,(3)

据成矿地质特征、成矿环境和成矿作用研究,内蒙古黄岗梁—孟恩陶勒盖地区存在同熔、重熔两个岩浆岩系列和与此相应的深源浅成Sn-Ag-Cu-Pb-Zn(Mo,Au)矿床系列;浅源深成Sn-Fe-W-Be矿床系列。区内矿床可划分为6个主要的成因类型和11种元素组合型式,本文探讨了成矿作用、成矿模式。成矿过程可用大井式、孟恩式、黄岗梁式、胡家店式、宝盖沟式5个矿床型式来概括。  相似文献   

Pattern detection in airborne LiDAR data using Laplacian of Gaussian filter   总被引：1，自引：0，他引：1  

Qingming Zhan  Yubin Liang  Ying Cai  Yinghui Xiao 《地球空间信息科学学报》2011,14(3):184-189

Methods for feature detection in laser scanning data have been studied for decades ever since the emergence of the technology.However,it is still one of the unsolved problems in LiDAR data processing due to difficulty of texture and structure information extraction in unevenly sampled points.The paper analyzes the characteristics of Laplacian of Gaussian(LoG) Filter and its potential use for structure detection in LiDAR data.A feature detection method based on LoG filtering is presented and ex-perimented on the unstructured points.The method filters the elevation value(namely,z coordinate value) of each point by convo-lution using LoG kernel within its local area and derives patterns suggesting the existence of certain types of ground ob-jects/features.The experiments are carried on a point cloud dataset acquired from a neighborhood area.The results demonstrate patterns detected at different scales and the relationship between standard deviation that defines LoG kernel and neighborhood size,which specifies the local area that is analyzed.  相似文献   

“0814”号强台风发展维持的环境场分析   总被引：4，自引：3，他引：1  

赵大军  于玉斌  李莹 《气象科学》2011,31(5):591-597

应用中国台风网提供的“黑格比”台风定位及强度资料、NCAR/NCEP再分析资料及DISCOVER项目组的卫星遥感数据对0814号强台风“黑格比”的发展、维持阶段进行了诊断分析。结果表明：西北太平洋中部异常偏高的SST为“黑格比”的生成提供了有利的背景条件,浙闽沿海及海南岛沿海异常偏高的SST为“黑格比”的发展和维持提供了有利的环境条件;西太副高断裂为东西两个单体,“黑格比”移经这两个单体之间使其强度迅速增强;南亚高压东侧的强东北气流将高位涡向台风环流输送,使得台风得以增强发展;强劲的西南季风为“黑格比”提供了充足的水汽来源,并向台风环流输送了气旋性相对涡度带,使其得以快速发展并维持强度。  相似文献   

基于模糊理论的气象科研项目风险与绩效评估     

孙大松  骆海英  周杰  于玉斌 《南京气象学院学报》2014,6(3):275-279

通过对项目风险进行综合分析、审定,确立一种气象科研项目的立项风险评估指标及体系的准则;从风险角度出发,构建出一组多级指标的项目风险评估指标体系;采用定性和定量相结合的方法,提出一种基于模糊理论的风险评估体系和模型,对科研项目的立项进行综合评估,给出评估意见,给决策提供指导意见;同时,提出一种气象科研项目绩效考核及推广方法.  相似文献   

基于小波变换及Matlab的遥感图像压缩效果分析     

袁蔚林  马燕  刘圣伟  许玉斌  孙华波 《地理信息世界》2013,(3):39-44

主要对小波变换在遥感图像压缩中的应用进行了研究。首先对小波变换理论及其实现进行了简要的介绍。然后,重点分析了小波变换分解层次、阈值选择对图像压缩效果的影响。利用MATLAB小波工具箱提供的小波变换函数,采用haar小波、db小波、sym小波、coif小波、bior小波进行遥感图像压缩,并对压缩效果进行了分析比较。结果表明,随着压缩倍数的增加,所需小波变换的分解层次也相应增加;但当压缩倍数选定后,对于大小一定的遥感图像,小波变换分解层次达到某一定级次时,再增加变换的分解层次,对压缩效果的作用甚微。因此,当图像大小一定时,压缩倍数和小波变换的分解层次之间存在一个较佳匹配问题。同时,通过实验数据,说明了在小波压缩过程中,阈值对压缩图像的压缩比和能量保持比的定量影响,表明将小波变换用于遥感图像压缩具有压缩比大,压缩效率高的优点。实验结果为小波变换在遥感图像压缩中的实际应用提供了理论参考。  相似文献   

Electrochemical properties of electrodes with different shapes and diffusion kinetic analysis of microbial fuel cells on ocean floor     

Yubin Fu  Jia Liu  Jia Su  Zhongkai Zhao  Yang Liu  Qian Xu 《中国海洋大学学报(英文版)》2012,11(1):25-31

Microbial fuel cell(MFC) on the ocean floor is a kind of novel energy-harvesting device that can be developed to drive small instruments to work continuously.The shape of electrode has a great effect on the performance of the MFC.In this paper,several shapes of electrode and cell structure were designed,and their performance in MFC were compared in pairs:Mesh(cell-1) vs.flat plate(cell-2),branch(cell-3) vs.cylinder(cell-4),and forest(cell-5) vs.disk(cell-6) FC.Our results showed that the maximum power densities were 16.50,14.20,19.30,15.00,14.64,and 9.95 mWm-2 for cell-1,2,3,4,5 and 6 respectively.And the corre-sponding diffusion-limited currents were 7.16,2.80,18.86,10.50,18.00,and 6.900 mA.The mesh and branch anodes showed higher power densities and much higher diffusion-limited currents than the flat plate and the cylinder anodes respectively due to the low diffusion hindrance with the former anodes.The forest cathode improved by 47% of the power density and by 161% of diffusion-limited current than the disk cathode due to the former’s extended solid/liquid/gas three-phase boundary.These results indicated that the shape of electrode is a major parameter that determining the diffusion-limited current of an MFC,and the differences in the elec-trode shape lead to the differences in cell performance.These results would be useful for MFC structure design in practical applica-tions.  相似文献