地球物理与中国的可持续发展

在20世纪中国的发展历程中,地球物理在资源探查、环境保护和减轻自然灾害服务等诸多方面发挥了举足轻重的作用。21世纪,中国走可持续发展之路已成为必然选择。随着可持续发展思想及内涵的逐渐丰富,地球物理必将为中国的可持续发展起到更大作用。     

Stable auto-tuning of hybrid adaptive fuzzy/neural controllers for nonlinear systems

In direct adaptive control, the adaptation mechanism attempts to adjust a parameterized nonlinear controller to approximate an ideal controller. In the indirect case, however, we approximate parts of the plant dynamics that are used by a feedback controller to cancel the system nonlinearities. In both cases, “approximators” such as linear mappings, polynomials, fuzzy systems, or neural networks can be used as either the parameterized nonlinear controller or identifier model. In this paper, we present an algorithm to tune the adaptation gain for a gradient-based hybrid update law used for a class of nonlinear continuous-time systems in both direct and indirect cases. In our proposed algorithm, the adaptation gain is obtained by minimizing the instantaneous control energy. Finally, we will demonstrate the performance of the algorithm via a wing rock regulation example.     

Detecting and measuring rings in banknote images

Various intelligent systems show a rapidly growing potential use of visual information processing technologies. This paper presents an example of employing visual information processing technologies for detecting and measuring rings in banknote images. The size of the rings is one of parameters used to inspect the banknote printing quality. The approach developed consists of two phases. In the first phase, based on histogram processing and data clustering, image areas containing rings are localized and edges of the rings are detected. Then, in the second phase, applying the hard and possibilistic spherical shell clustering to the extracted edge pixels the ring centre and radii are estimated. The experimental investigations performed have shown that even highly occluded rings are robustly detected. Several prototypes of the system developed have been installed in two banknote printing shops in Europe.     

海阳核电一期工程建设管理与实践

介绍了山东海阳核电一期工程的基本情况,以及项目管理和工程进展情况。通过海阳核电工程建设管理实践,提出了核电建设中遇到的问题,供同行进行交流和探讨。     

油气色谱地球化学录井技术的进展及发展方向

综述了油气色谱地球化学录井技术的新进展,包括钻井液气测色谱录井和罐装样轻烃录井技术的改进和完善,岩屑(心)热解色谱、抽提物色谱分析方法在录井中的应用等,并对今后油气色谱录井技术的发展方向进行了探讨。     

价值工程在水利工程施工中的应用

从施工现场管理的角度,论述了在施工中运用价值工程的意义。并结合实例分析实现对建设项目施工与价值工程两个方面综合考虑,从而优化施工工程方案,结果显示该方法是有效的,并对施工人员提出了相应要求。     

AP1000核电冷却剂主管道监造分析

AP1000核电冷却剂主管道首次采用超低碳控氮不锈钢整体锻造技术,有别于传统压水堆核电的离心铸造管道,具有冶炼、锻造技术要求高、机加工时间长、弯管工艺复杂、制造难度大等特点。通过对AP1000冷却剂主管道制造过程中的技术要点总结,介绍了制造环节中的关键控制点,同时对主管道制造中的质量监督重点做了分析。     

海阳核电项目安全管理实践与创新

山东海阳核电项目安全管理体系是在参照国内其他核电站建设经验并依据职业健康安全管理体系规范建立起来的,在组织机构设置、安全程序管理、安全管理过程控制、安全信息管理等方面深度和广度都有所扩展和改进,不断提高安全管理体系的有效性与适宜性,以实现安全管理工作的持续改进。     

海阳核电1号核岛混凝土试验和施工经验分析

核电站核岛厂房是核安全相关的构筑物,对建筑用混凝土的质量有着严格的规范要求。文章介绍了海阳核电1号核岛底板施工的全过程,对混凝土配比设计、试验和施工过程中的技术要求作了阐述,对后续AP1000项目的建设具有一定的借鉴意义。     

龙门山前冲断带的油气勘探对准噶尔盆地南缘油气勘探的启示

通过对准南冲断带及其前陆盆地系统与四川盆地西部龙门山冲断带及其前陆盆地系统在构造与石油地质 特征等方面的广泛类比分析,在借鉴龙门山前冲断带在石油地质研究与油气勘探等方面的成功经验的基础上,对准南 构造带的油气勘探提出了五点有益的启示。