YGQ—89／43型双作用冲击器微机电算分析

通过微机模拟仿真电算，分析ＹＧＱ－８９／４３型冲击器结构参数的变化对冲击器性能的影响规律，从而找出调节冲击器性能的有效方法，指导设计和生产使用。     

辽河盆地下第三系层序分析

根据岩性、岩相、地震反射、测井响应、古生物、构造旋回、接触关系及同位素年龄测定等，将辽河盆地下第三系划分为４个层序和１２个亚层序。根据地层层序综合分析，辽河盆地早第三纪具有如下沉积演化特征：①构造运动的控制性；②沉积格架的不均衡性；③沉积演化的阶段性；④沉积中心的迁移性。     

地壳介质弹性和电性各向异性研究的新进展

分析了地壳介质各向异性研究的现状，指出了弹性和电性各向异性研究中存在的问题，提出了联合利用弹性和电性各向异性研究地球介质特征及提取物性参数的正反演方法．理论研究和地震过程的实际资料表明，将弹性和电性结合起来研究地壳介质各向异性具有清晰明确的物理意义，是各向异性研究的一个非常有发展前景的新领域。     

城市典型房屋屋顶构网及可视化研究

介绍了房屋屋顶构网及其三维显示的方法,给出了具体的数据结构及相应的算法流程以及房屋屋顶构网的三维显示结果.     

Estimating severity of liquefaction-induced damage near foundation

An empirical procedure for estimating the severity of liquefaction-induced ground damage at or near foundations of existing buildings is established. The procedure is based on an examination of 30 case histories from recent earthquakes. The data for these case histories consist of observations of the damage that resulted from liquefaction, and the subsurface soil conditions as revealed by cone penetration tests. These field observations are used to classify these cases into one of three damaging effect categories, ‘no damage’, ‘minor to moderate damage’, and ‘major damage’. The potential for liquefaction-induced ground failure at each site is calculated and expressed as the probability of ground failure. The relationship between the probability of ground failure and the damage class is established, which allows for the evaluation of the severity of liquefaction-induced ground damage at or near foundations. The procedure presented herein represents a significant attempt to address the issue of liquefaction effect. Caution must be exercised, however, when using the proposed model and procedure for estimating liquefaction damage severity, because they are developed based on limited number of case histories.     

DJY-2000B型地震电磁脉冲观测系统

DJY-2000B型地震电磁脉冲观测系统主要由一对LES低频电磁传感器、DJY-2000B型电磁脉冲记录仪、通信单元、计算机系统及配套设施组成.     

大深度载人潜水器浮力材料的应用现状和发展趋势

在所有海洋装备中,大深度载人潜水器代表深海技术的制高点,而大深度载人潜水器的研制所要解决的关键问题之一就是浮力材料的选择。文章概述浮力材料的分类以及浮力材料在三代大深度载人潜水器上的应用情况,并对能够满足大深度尤其是全海深载人潜水器需求的浮力材料进行对比研究。研究结果表明:微珠复合泡沫虽然能满足7 000m载人潜水器的需求,但应用在全海深载人潜水器时存在密度大和吸水率高的缺点,且不能满足1.5倍安全压力要求;陶瓷等新型浮力材料的密度小和吸水率低,是未来浮力材料的重要发展方向。本研究可为大深度载人潜水器浮力材料的选择提供一定的理论支持。     

白令海大型底栖动物群落结构及其空间分布格局

Due to its unique geological location, the Bering Sea is an ideal place to investigate the water exchange and ecosystem connectivity of the Pacific Ocean–Arctic Ocean and subarctic–Arctic region. Based on a number of summer surveys(July to September, 2010, 2012 and 2014), macrobenthic communities and their spatial-temporal patterns are exhibited for the majority of the Bering Sea(53°59′–64°36′N). The results show that the macrobenthic communities were dominated by northern cold-water species and immigrant eurythermic species, and the communities assumed a dispersed and patchy distribution pattern. Polychaetes(Scoloplos armiger), crustaceans(Ceradocus capensis) and sea urchins(Echinarachnius parma) were the main dominant groups in the shallow shelves; the sea star(Ctenodiscus crispatus) and the brittle star(Ophiura sarsii) were the main dominant groups in the continental slope; whereas small polychaetes(Prionospio malmgreni) dominated the basin area. Sediment type, water depth, and currents were the major factors affecting the structure and spatial distribution of the macrobenthic communities. Compared with other seas, the shallow areas of the Bering Sea showed an extremely high-standing biomass. In particular, the northern shelf area(north of St. Lawrence Islands and west of 170°W),which is primarily controlled by Anadyr Water, is an undersea oasis. In contrast, a deficiency in the downward transport of particulate organic carbon has resulted in a desert-like seabed in the basin area. By comparing our results to previous studies, we found that macrobenthic communities of the Bering Sea have undergone significant structural changes in recent decades, resulting in a decrease in abundance and an increase in biomass.In addition, populations of amphipods and bivalves in the northern shelves have decreased significantly and have been gradually replaced by other species. These changes might be associated with advanced seasonal ice melting,changes in organic carbon input, and global warming, indicating that large-scale ecosystem changes have been occurring in the Bering Sea.     

海州湾4种鱼类生长特征的空间异质性

传统的渔业资源评估均假设鱼类的生长参数是匀质的，然而近年来越来越多的研究表明海洋鱼类生长存在空间异质性。为探究海州湾鱼类生长参数的空间异质性现象，本研究分析了2013–2018年海州湾及其邻近海域方氏云鳚(Pholis fangi)、尖海龙(Syngnatus acus)、小黄鱼(Larimichthys polyactis)和赤鼻棱鳀(Thryssa kammalensis)的空间分布，使用电子体长频率分析方法结合Bootstrap重抽样方法估算了这4种鱼类的生长参数及其在深、浅水区域中的差异。结果显示，这4种鱼类生长参数均表现出一定的空间异质性，其中尖海龙和小黄鱼生长参数的空间异质性表现较为明显。这种差异可能是由于空间上的理化条件、群落结构以及物种本身洄游分布的差异而产生的。