雷达工程专业本科毕业设计指导模式探索

为提高本科毕业设计指导工作效率和毕业论文质量，本文基于雷达工程专业特点建立了“导师主导--研究生辅助--本科生合作”的多层次、模块化、场景化指导模式。该模式以导师为核心、科研小组和学员合作为辅助，全方位全过程保障本科毕设工作。实践表明，该模式可以有效提高指导工作效率和本科毕业设计质量，学生专业素养和实践能力显著提升。本文对电子类专业本科毕设指导具有重要借鉴意义。     

Research and demonstration on hydrogen compatibility of pipelines: a review of current status and challenges

Hydrogen transportation by pipelines gradually becomes a critical engineering route in the worldwide adaptation of hydrogen as a form of clean energy. However, due to the hydrogen embrittlement effect, the compatibility of linepipe steels and associated welds with hydrogen is a major concern when designing hydrogen-carrying pipelines. When hydrogen enters the steels, their ductility, fracture resistance, and fatigue properties can be adversely altered. This paper reviews the status of several demonstration projects for natural gas-hydrogen blending and pure hydrogen transportation, the pipeline materials used and their operating parameters. This paper also compares the current standards of materials specifications for hydrogen pipeline systems from different parts of the world. The hydrogen compatibility and tolerance of varying grades of linepipe steels and the relevant testing methods for assessing the compatibility are then discussed, and the conservatism or the inadequacies of the test conditions of the current standards are pointed out for future improvement.     

模具设计与制造专业群虚拟仿真实训基地建设路径研究

针对模具设计与制造专业群实训教学开展过程中存在的问题,开展专业群虚拟仿真实训基地的建设,通过精密模具智能制造生产线仿真实训工厂、模具数字化设计及智能成型单元综合应用平台、开放共享课程资源等3个方面内容的建设,引入行业新技术、新工艺、新标准,确保虚拟仿真教学资源与学生职业能力培养相一致。基地建设依托智能制造新技术,以培养高层次复合型技术技能人才为主线,满足实训教学为核心,多方共享为目标,助力区域经济发展,服务"鲁班工坊"国际化建设,最终实现虚拟仿真实训基地区域示范性效果。     

Analysis of the risk-sharing ratio in PPP projects based on government minimum revenue guarantees

Public-private partnership (PPP) projects have been widely applied in infrastructure construction. A suitable risk distribution strategy is crucial for promoting negotiations between the government and investors. The government usually provides guarantees to investors to distribute risk. However, an excessive guarantee increases the government's financial burden, whereas an insufficient guarantee reduces the confidence of the investors participating in the project. In a minimum revenue guarantee (MRG), the government subsidizes the investors the difference between the actual revenue and the government guarantee line if there is a loss. In PPP power plant and highway projects, investors' revenues come from two sources: government guarantees and the project company's self-sale. To support project companies and to optimize the projects' benefits, the government should set a reasonable benchmark for purchase amounts. Based on the traditional principal-agent model, this paper introduces the reciprocal preference theory to analyze the risk-sharing ratio most suitable for the government. Then, an optimal incentive mechanism is established to guarantee the project's income. The results indicate that by setting a different guarantee strategy for different participants, the government can utilize reciprocal preference to incentivize investors to exert more effort during a partnership and avoid moral hazard.     

Is open innovation always the best for SMEs? An exploratory analysis at the project level

Open innovation (OI) projects are increasingly adopted by small‐ and medium‐sized enterprises (SMEs). Yet, undertaking OI is not only a source of opportunities for SMEs as it can, at the same time, present risks. How SMEs manage the balance between the potential benefits and the emerging challenges of OI is still an overlooked topic in the literature. Using evidence gathered through multiple case studies and drawing upon the relational view of the firm, we explore how and why value creation opportunities and different managerial challenges emerge for SMEs pursuing OI projects. We analyze different stages of OI projects in several different contexts of their implementation. Our analysis sheds light on the different nature and dynamics of knowledge involved within OI projects as important boundary conditions affecting successful search paths, learning processes, and the development of appropriability mechanisms. By offering a contextualized view of OI in SMEs, this study also provides insights to business managers on the situational opportunities and constraints of OI, including managerial suggestions on actions to manage tensions within differing OI projects.     

中美典型高压页岩气藏钻井提速技术对比与启示

美国Haynesville高压页岩气气藏与中国长宁—威远国家级页岩气示范区下志留统龙马溪组高压页岩气藏的地质、钻井条件最为类似,前者的钻井提速技术思路对于我国页岩气快速钻井也具有重要的参考借鉴意义。为了实现我国页岩气藏的钻井提速,通过对比中国和美国典型高压页岩气藏钻井提速技术,分析探讨了上述两个气藏在钻井提速技术方面的异同点。研究结果表明:①目前美国Haynesville等页岩气藏已将水平段井眼尺寸从215.9 mm缩小到171.5 mm或161.1 mm,单井钻井投资降低超过25%,节能减排优势明显;②美国同行采用的"高效钻头+配套井下提速工具+钻井参数优化软件/装备"的硬研磨性难钻地层系统化钻井提速技术,值得国内重视、借鉴、攻关、应用;③"控压钻井+降密度"钻井技术能够在高压页岩层段钻井提速中起到至关重要的提速应用效果。结论认为,应积极在国内国家级页岩气示范区开展缩小井身结构尺寸及其相关的钻井配套装备、工具、软件的应用探索试验;在目的层段值得持续探索、优化、应用控压钻井技术。     

推进实施广东省创新医疗器械产品应用示范工程的对策建议

通过对参与广东省“十百千万工程”政商学医各界，包括广东省科学技术厅、广东省食品药品监督管理局、深圳迈瑞生物医疗电子股份有限公司、广州三瑞医疗器械有限公司、汕头市超声仪器研究所有限公司、金域检验中心有限公司、中山大学达安健康产业集团、广东省医疗器械产业技术创新战略联盟、南方医科大学、中山大学工学院、中科院深圳先进技术研究院、韶关乐昌市乐城街道社区卫生服务中心、梅州市蕉岭县中医医院、梅州市蕉岭县新铺镇中心卫生院、蕉岭县广福镇中心卫生院、梅州市兴宁市坭陂镇中心卫生院共16家单位进行调研，分析了实施广东省创新医疗器械产品应用示范工程的意义、现状及问题，提出了进一步推动该项工程的对策建议。     

Learning and revision in cognitive robotics disassembly automation

Disassembly is a key step for an efficient treatment of end-of-life (EOL) products. A principle of cognitive robotics is implemented to address the problem regarding uncertainties and variations in the automatic disassembly process. In this article, advanced behaviour control based on two cognitive abilities, namely learning and revision, are proposed. The knowledge related to the disassembly process of a particular model of product is learned by the cognitive robotic agent (CRA) and will be implemented when the same model has been seen again. This knowledge is able to be used as a disassembly sequence plan (DSP) and disassembly process plan (DPP). The agent autonomously learns by reasoning throughout the process. In case of an unresolved condition, human assistance is given and the corresponding knowledge will be learned by demonstration. The process can be performed more efficiently by applying a revision strategy that optimises the operation plans. As a result, the performance of the process regarding time and level of autonomy are improved. The validation was done on various models of a case-study product, Liquid Crystal Display (LCD) screen.     

Why do individuals engage in collective actions against major construction projects? —An empirical analysis based on Chinese data

Collective actions against major construction projects are becoming common because of the public’s increasing civil rights awareness and environmental consciousness. Thus, it is important to explore the critical factors responsible for collective actions against major construction projects. This study initially developed 25 indicators inducing collective actions based on a comprehensive literature review. An empirical study with 127 samples was conducted using questionnaire surveys and semi-structured interviews from projects located in Central China. Furthermore, ranking analysis and factor analyses were implemented to conclude that collective actions in major construction projects can be explained by a six-dimension critical factor system: benefits to the public, characteristics of project performers, layout of projects, living quality of the public, perceptions of the public, and influence from the authority. This study contributes to government administration for collective actions against major construction projects and serves as a useful reference for further studies of this type.     

作业成本法在新田煤矿成本控制和管理中的应用研究

为了提升新田煤矿作业预算、过程控制、效果考核评价等精细化管理水平,降本增效的作业点以及综合成本,采用作业成本法对新田煤矿成本控制和管理进行了研究,建立了组织机构明确管控项目,研究作业成本核算体系以及作业成本法执行体系。研究得出,作业成本法能为企业产品定价、生产决策、市场定位以及成本控制决策等提供准确成本信息。