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纵向监管、地方选择性供地与产业结构绿色转型

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经济理论与经济管理 2024年第2期44卷 1-16页

作者：周玉龙刘玉海宋悦南开大学经济与社会发展研究院南开大学经济行为与政策模拟实验室 300071

地方政府的有效执行是中国式分权下提升中央发展战略实施绩效的关键,而中央政府对地方政府治理行为的有效监督则是其中至关重要的环节。本文基于2007—2019年中国微观工业用地供应以及中央环保督察的通报结果数据,采用广义双重差分法实... 详细信息

地方政府的有效执行是中国式分权下提升中央发展战略实施绩效的关键,而中央政府对地方政府治理行为的有效监督则是其中至关重要的环节。本文基于2007—2019年中国微观工业用地供应以及中央环保督察的通报结果数据,采用广义双重差分法实证考察中央环保督察对地方政府选择性供地策略的影响及其机制。研究表明,中央环保督察促使地方政府降低污染密集型工业用地供应,增加清洁型工业用地供应,从而推动地区产业结构的绿色转型。机制分析发现,中央环保督察通过地方领导人职业发展激励机制以及产业转型能力机制对不同特征的城市工业土地供应结构策略产生异质性影响。本文结论对高质量发展背景下的央地互动关系与地方利用土地偏向性供给推动产业结构绿色转型具有政策启示。

关键词：中央环保督察地方选择性供地产业结构绿色转型纵向监管

基于笼屉结构的机载高能激光系统光学中舱温度适应性研究

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红外与激光工程 2024年第4期53卷 100-109页

作者：李响周晨朱永奇董科研高亮安岩席文强刘玉海长春理工大学光电工程学院吉林长春130022 长春理工大学空间光电技术国家与地方联合工程研究中心吉林长春130022 长春理工大学机电工程学院吉林长春130022

相较于车载、舰载设备,机载设备受体积及工作环境的限制,发展较为缓慢。针对机载设备的轻小型化要求,系统采用“光路堆叠”思想,提出笼屉式分层结构,实现了系统体积的要求。因光学中舱中包含精跟踪及主激光支路,温度变化时各支路间的光... 详细信息

相较于车载、舰载设备,机载设备受体积及工作环境的限制,发展较为缓慢。针对机载设备的轻小型化要求,系统采用“光路堆叠”思想,提出笼屉式分层结构,实现了系统体积的要求。因光学中舱中包含精跟踪及主激光支路,温度变化时各支路间的光轴一致性难以保证,导致跟踪目标发生偏移,主激光支路无法对目标进行精确打击,严重影响系统的工作。为解决上述问题,对光学中舱进行有限元仿真分析,研究光学中舱在20±5℃情况下各镜片的变形。对镜片变形中影响光轴偏折的刚体位移进行提取计算,计算出单个镜片的偏转角度。根据反射棱镜安装误差理论对各支路间的光轴偏移量进行计算,分析精跟踪支路与主激光支路光轴一致性偏差。经过仿真分析,系统精跟踪支路与主激光支路光轴方位偏差为109.634μrad,俯仰偏差为132.952μrad。在实验室中进行25℃温度实验,结果表明,系统精跟踪支路与主激光支路光轴方位偏差为104.019μrad,俯仰偏差为125.009μrad,与仿真结果误差分别为5.40%、6.35%,验证了仿真结果的合理性。

关键词：高能激光系统笼屉结构稳态热分析刚体位移光轴一致性

基于巴歇尔槽的输变电工程施工降水检测系统设计

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电力安全技术 2024年第4期26卷 40-43页

作者：刘玉海田鑫娜姜雅男国网山东省电力公司建设公司山东济南250001

为解决输变电工程施工降水费用结算误差较大的问题,研制了一套基于巴歇尔槽的输变电工程施工降水的检测与分析系统。该系统可检测水泵的排水量与排水时长,分析检测数据,并统计排水总量,准确计算水泵的降水台班,合理控制降水费用,并广泛... 详细信息

为解决输变电工程施工降水费用结算误差较大的问题,研制了一套基于巴歇尔槽的输变电工程施工降水的检测与分析系统。该系统可检测水泵的排水量与排水时长,分析检测数据,并统计排水总量,准确计算水泵的降水台班,合理控制降水费用,并广泛应用于不同工程中。

关键词：输变电工程施工降水流量检测降水费用巴歇尔槽

Deep-learning-based information mining from ocean remote-sensing imagery

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National Science Review 2020年第10期7卷 1584-1605页

作者： Xiaofeng Li Bin liu Gang Zheng Yibin Ren Shuangshang Zhang Yingjie liu Le Gao yuhai liu Bin Zhang Fan Wang Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences Center for Ocean Mega-Science Chinese Academy of Sciences College of Marine Sciences Shanghai Ocean University State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural Resources College of Oceanography Hohai University Dawning International Information Industry Co. Ltd.

With the continuous development of space and sensor technologies during the last 40 years, ocean remote sensing has entered into the big-data era with typical five-V(volume, variety, value, velocity and veracity)characteristics. Ocean remote-sensing data archives reach several tens of petabytes and massive satellite data are acquired worldwide daily. To precisely, efficiently and intelligently mine the useful information submerged in such ocean remote-sensing data sets is a big challenge. Deep learning—a powerful technology recently emerging in the machine-learning field—has demonstrated its more significant superiority over traditional physical-or statistical-based algorithms for image-information extraction in many industrial-field applications and starts to draw interest in ocean remote-sensing applications. In this review paper, we first systematically reviewed two deep-learning frameworks that carry out ocean remote-sensing-image classifications and then presented eight typical applications in ocean internal-wave/eddy/oil-spill/coastal-inundation/sea-ice/green-algae/ship/coral-reef mapping from different types of ocean remote-sensing imagery to show how effective these deep-learning frameworks are. Researchers can also readily modify these existing frameworks for information mining of other kinds of remote-sensing imagery.

关键词： ocean remote sensing big data artificial intelligence image classification

DO THE LATERAL FIELDS EXIST IN SOME GALEASPIDS (JAWLESS FISHES)?

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古脊椎动物学报(中英文） 1993年第4期 321-324页

作者： liu yuhai(Institute of Vertebrate Paleontology and Paleoanthropology, Academia Sinica)

Pan et Wang (1981) reported that the dorsal shield of the galeaspid, Qingmenaspis, held a large opening on each side, but owing to the ill preservation they reservedly assumed it likely to be a dorsal branchial opening. This structure was also recognized later in Lungmenshanaspis by Wang Nian-zhong (1991). He considered its function to remain obscure. More recently Pan (1992) described the structure in a number of new galeaspids and renamed it fenestra. He distingushed the structure into two kinds: the lateral dorsal fenestra, which is narrow and small, existing in Pentathyraspis and Microhoplonaspis, and the dorsal fenestra, which is broad, found in Macrothyraspis, Sinoszechuanaspis as well as Qingmenaspis. Pan assumed the fenestra to be coverd by the skin when the creatures were alive, and to play a role in hydrodynamic. He regarded this structure as a unique character for the fenestra galeaspids.

关键词： galeaspid, osteostracan lateral fenestra lateral field

Aspen Plus在生物质化学链气化技术中的应用进展

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当代化工研究 2024年第13期 18-23页

作者：万鹏程赵雪露刘玉海马晶晶宁夏大学化学化工学院(省部共建煤炭高效利用与绿色化工国家重点实验室) 宁夏750021

目前世界能源结构仍以化石能源为主,面对能源紧缺与环境恶化的局面,开发可再生能源不仅能够调节能源结构,缓解能源压力,同时可以改善因化石能源过度使用而带来的环境问题。生物质为生活中最常见的可再生能源,对于生物质的合理利用是目... 详细信息

目前世界能源结构仍以化石能源为主,面对能源紧缺与环境恶化的局面,开发可再生能源不仅能够调节能源结构,缓解能源压力,同时可以改善因化石能源过度使用而带来的环境问题。生物质为生活中最常见的可再生能源,对于生物质的合理利用是目前研究的主要方向。生物质的高质化利用有直接燃烧、生物转换和热化学转换等方式,但普遍存在产生大量污染物及生物质利用效率不高等问题。因此,发展清洁高效的可再生能源利用技术显得至关重要。化学链气化技术不仅可以从CO_(2)捕集和载氧体的循环使用等方面降低环境污染,还能从产生的合成气等化学用品中提升经济效益。通过Aspen Plus模拟软件还可以对生物质耦合化学链气化过程进行实时监控、优化,并对后续的工艺开发提供理论和数据支持。因此,本文从生物质种类与过程能量供给方式出发,对不同类型的生物质化学链气化过程Aspen Plus模拟研究进行了系统论述,综述了Aspen Plus模拟软件在生物质化学链气化技术领域中的工艺模拟、反应器优化、生产过程中能耗问题的应用情况,并提出了该软件的应用前景和发展方向,为我国化学链技术的应用和模拟研究提供了一定的参考。

关键词：化学链气化 Aspen Plus模拟生物质

A NOMENCLATURAL NOTE ON EUGALEASPIS FOR GALEASPIS liu,1965;EUGALEASPIDAE FOR GALEASPIDAE liu,1965;EUGALEASPIDIFORMES FOR GALEASPIDIFORMES liu,1965

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古脊椎动物学报(中英文） 1980年第3期 256-257页

作者： liu yuhai

Recently *** kindly passed on ***’s useful advice to meabout the homonym between the generic names Galeaspis in Agnatha and in *** istrue that Galeaspis liu,1965,a Devonian agnathan,is a junior homonym of Galeaspis I... 详细信息

关键词： A NOMENCLATURAL NOTE ON EUGALEASPIS FOR GALEASPIS liu,1965 EUGALEASPIDAE FOR GALEASPIDAE liu,1965 EUGALEASPIDIFORMES FOR GALEASPIDIFORMES liu,1965

Real-Time Co-optimization of Gear Shifting and Engine Torque for Predictive Cruise Control of Heavy-Duty Trucks

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 294-317页

作者： Hongqing Chu Xiaoxiang Na Huan liu yuhai Wang Zhuo Yang Lin Zhang Hong Chen School of Automotive Studies Tongji UniversityShanghaiChina Department of Engineering University of CambridgeCambridgeUK State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchunChina Qingdao Automotive Research Institute Jilin UniversityQingdaoChina Dongfeng Commercial Vehicle Technology Center Dongfeng Motor CorporationWuhanChina

Fuel consumption is one of the main concerns for heavy-duty *** cruise control(PCC)provides an intriguing opportunity to reduce fuel consumption by using the upcoming road *** this study,a real-time implementable PCC,which simultaneously optimizes engine torque and gear shifting,is proposed for heavy-duty *** minimize fuel consumption,the problem of the PCC is formulated as a nonlinear model predictive control(MPC),in which the upcoming road elevation information is *** the solution of the nonlinear MPC is time consuming;thus,a real-time implementable solver is developed based on Pontryagin’s maximum principle and indirect shooting *** programming(DP)algorithm,as a global optimization algorithm,is used as a performance benchmark for the proposed ***,hardware-in-the-loop and real-truck experiments are conducted to verify the performance of the proposed *** results demonstrate that the MPC-based solution performs nearly as well as the DP-based solution,with less than 1%deviation for testing ***,the proposed co-optimization controller is implementable in a real-truck,and the proposed MPC-based PCC algorithm achieves a fuel-saving rate of 7.9%without compromising the truck’s travel time.

关键词： Heavy-duty truck Predictive cruise control Model predictive control Pontryagin’s maximum principle Real-truck implementation

Theory and practice of hull dynamic deformation law and heading angle transfer error correction

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Journal of Ocean Engineering and Science 2024年第2期9卷 191-198页

作者： Yepin Qu Jianqiang liu yuhai Lyu Chaoran Zhang Tao Li Naval Research Institute Shanghai 200436PR China

In order to meet the demand of high-precision heading angle transmission in the transfer alignment of inertial navigation system on moving base,the analytical function relationship between the hull deforma-tion and the turning angular velocity and angular acceleration was derived by using the classical beam theory based on the analysis of the equivalent load exerted by the hydrodynamic force and inertia force on the hull structure during the turning process under the combined action of the steering rudder mo-ment and wave *** objective law between the angular motion and the azimuth deformation angle of the hull under the combined action of maneuvering and sea waves was ***,the correc-tion coefficients were determined according to the left turn and right turn motions of the hull by using the measured data of the ship in the sea trial during the S-shape maneuvering navigation,and the az-imuth deformation angle correction was *** results indicated that the application of the Qu’s bending deformation correction formula could greatly reduce the influence of the hull flexural deforma-tion on the heading angle accuracy,meet the needs of high-precision heading angle transmission,and fully verify the correctness of the hull azimuth deformation law and the heading angle transmission er-ror correction *** theory and method provided technical support for establishing high-precision distributed digital reference in the field of transfer alignment of inertial navigation on moving base and the application of heading angle transfer of other shipborne equipment.

关键词： Hull deformation Hull girder Heading angle Alignment on moving Base Transfer alignment Error correction