加强研究 主动服务 推动中国风电大发展

一引言 2007年12月末,经中国气象局批准,吉林省气象局成立了吉林省风能研究与服务中心。吉林省风能研究与服务中心的主要任务是“加强研究、主动服务,推动中国风电大发展”。 二全球风能发电进展     

混凝土试件质量监理控制要点

加强对混凝土试件的留置、养护、试验管理是工程质量控制的关键项目,也是监理工程师质量控制的重要内容。     

长度检定场设计及控制测量

长度检定场是电磁波测距仪量值传递的主要标准,主要用于各等级电磁波测距仪的常数测定,本文根据相关的测量规范,就建场设计及其控制测量中一些技术问题作了一些分析和探讨.     

道路工程平面坐标系的统一性理论研究

传统上道路工程勘测、设计、施工各单位统一采用以初测导线点处垂线为基准线、水准面为基准面的,把各相邻测站处局部水准面相连拼接成一个统一带状的平面坐标系统（定义为道路工程渐变平面坐标系）。本文提出顾及地球重力场模型,用GPS直接建立垂线和水准面系统的道路工程渐变平面坐标系的解决方案,从理论上统一了勘测坐标系（GPS平面坐标系）和设计、施工坐标系（道路工程渐变平面坐标系）,消除了其间存在的系统误差。     

无线节点采集技术在东部复杂地表区地震勘探中的应用及效果

随着东部老油田油气勘探程度的不断提升,后续复杂地质目标的勘探对地震资料的分辨率和成像精度提出了更高要求,导致地震采集方案日趋强化,野外采集作业投入的设备数量急剧增加,地震勘探面临巨大的成本压力.面对东部老油区人口稠密、地表障碍密集的特点,无线节点具有放样不受地物制约、自主连续接收、采集排列可室内灵活定义的优势;与可控震源高效激发技术相配套,可实现复杂地表区三维地震采集的高效作业,从而缩短地震采集工期,缓解地震勘探成本的压力.2020年东方地球物理公司辽河物探处在辽河坳陷SJP地区的三维勘探表明,无线节点采集技术在复杂地表区适用可行,可以有效提高复杂地质目标的成像精度,是东部老油区地震勘探技术经济一体化的发展方向.     

区段控制浓度的一种定量化模型研究

该文就总量控制工作进行理论探讨,提出控制平均浓度的排污等效模型,同时对计算区段控制浓度的确定进行定量化模型研究。该模型简便、易操作、实用性强,具有一定的理论意义和实用价值。     

Earthquake-controlling Processes of Detachment Zones in Eastern North China

The basin-and-range area in eastern North China is known for frequent occurrence of earthquakes, their great magnitudes and heavy losses thereby incurred. Seismic studies in the past usually emphasized the intersections, inflexions and branches of the faults. However, the intensities of many great earthquakes in this area do not show linear distribution, and the epicenters are horizontally dispersed at certain depths instead of along the strike of faults. Based on the sub-mantle plume studies made by authors in the past decade, it is thought that there exists an uplifted sub-mantle plume under the fault depression area in North China. The uplifting and intrusion of mantle materials caused the upper crust to be faulted, while low-velocity and high-velocity layers are alternatively distributed in the middle crust under the influence of the mantle and the lower crust. The middle and lower crust materials were detached from the top of the sub-mantle plume to the surroundings while the sub-mantle plume materi     

Calculation of the Model of Coesite Inclusions and Analysis of Their Retrometamorphic Paths

The process and path of retrometamorphism of coesite have great significance to our understanding of the P-T tracks of the exhumation of ultrahigh-pressure metamorphic rocks. Most of the coesites in the eclogite from Shima, Anhui Province, the Dabie Mountains, China, are found degraded to quartz partly or wholly, with ruptures occurring in the shells, outside which include the coesite and quartz. According to the microscopic observation, the sample of coesite inclusion is composed of garnet, quartz and coesite, based on which we have built a three-shelled composite sphere model to compute the transition of coesite. Based on the crystal growth formulas and pressure conditions of the ruptures in the garnet, we have calculated the radius of the quartz sphere, which depends on temperature, and eventually drawn the different retrometamorphic paths for different retrometamorphism rates.     

基于解析梯度的近地小天体探测机会搜索问题研究

研究近地小天体的探测机会搜索问题.针对交会型探测任务,通过结合变分理论和状态转移矩阵推导了性能指标关于可调参数的解析偏导数,然后在搜索空间中随机生成初始点,并从这些初始点出发利用解析偏导数寻优,从而得到搜索空间内对应潜在发射机会的全部局部极小值点.此方法既在一定程度上保持了传统搜索方法全局搜索的特点,又克服了传统搜索方法的盲目性,因此计算速度获得很大提高.此外该方法可以对探测机会的搜索精度进行有效地控制.     

利用区域辐射特性优化获取光学遥感数据

通过分析成像过程及其影响因素,提出了对成像积分时间进行控制的优化成像方法。首先建立成像参数模型,探讨了模型参数计算、成像过程中模型参数的选择,分析了图像后处理问题,并利用北京一号小卫星进行了遥感数据优化获取实验。实验结果表明,根据地物特性进行成像参数优化后获取的图像具有更宽的动态范围和更高的辐射分辨率,信息量和信噪比也大幅增强。