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Catalysis of semihydrogenation of acetylene to ethylene: current trends, challenges, and outlook
《化学科学与工程前沿(英文)》 2022年 第16卷 第7期 页码 1031-1059 doi: 10.1007/s11705-021-2113-3
Mapping the trends and prospects of battery cathode materials based on patent landscape
《能源前沿(英文)》 页码 822-832 doi: 10.1007/s11708-023-0900-x
关键词: patent analysis cathode batteries technology life cycle
Trends of environmental accidents and impact factors in China
Pengli XUE, Weihua ZENG
《环境科学与工程前沿(英文)》 2011年 第5卷 第2期 页码 266-276 doi: 10.1007/s11783-010-0267-1
关键词: environmental accidents spatial and temporal trends environmental risk
《能源前沿(英文)》 页码 727-750 doi: 10.1007/s11708-023-0896-2
关键词: triboelectric nanogenerator (TENG) self-healable nanomaterials self-powered devices energy
《农业科学与工程前沿(英文)》 2021年 第8卷 第4期 页码 559-567 doi: 10.15302/J-FASE -2020344
Intensifying human activity in the Yangtze River basin has substantially increased nutrient concentrations in the Yangtze River Estuary, leading to degradation of the coastal environment. Analysis of nutrient determinations published over the past 50 years reveals a gradual decreasing trend in the concentrations and fluxes of dissolved silicate (DSi). However, both dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphate (DIP) concentrations have increased significantly since the 1970s. The frequency of and area covered by red tide outbreaks have increased greatly during this period, mainly due to changes in nutrient supply ratios [i.e., N/P (DIN/DIP), N/Si (DIN/DSi), P/Si (DIP/DSi)]. A strong correlation was found between the riverine DIN fluxes and the estimated DIN inputs from the major N sources, particularly fertilizers and atmospheric deposition. The data provide a comprehensive assessment of nutrients in the Yangtze River basin and their ecological impacts and indicate a potentially significant influence of atmospheric deposition on DIN loadings and fluxes.
关键词: atmospheric deposition / ecological impacts / nitrogen sources / nutrients / Yangtze delta
Mirosɬaw J. Skibniewski
《工程管理前沿(英文)》 2014年 第1卷 第3期 页码 246-259 doi: 10.15302/J-FEM-2014034
关键词: automation international research journal research trends industrial safety engineering and management construction technology building engineering information technology
Emergency strategies and trends in the management of liver trauma
null
《医学前沿(英文)》 2012年 第6卷 第3期 页码 225-233 doi: 10.1007/s11684-012-0186-6
The liver is the most frequently injured organ during abdominal trauma. The management of hepatic trauma has undergone a paradigm shift over the past several decades, with mandatory operation giving way to nonoperative treatment. Better understanding of the mechanisms and grade of liver injury aids in the initial assessment and establishment of a management strategy. Hemodynamically unstable patients should undergo focused abdominal sonography for trauma, whereas stable patients may undergo computed tomography, the standard examination protocol. The grade of liver injury alone does not accurately predict the need for operation, and nonoperative management is rapidly becoming popular for high-grade injuries. Hemodynamic instability with positive focused abdominal sonography for trauma and peritonitis is an indicator of the need for emergent operative intervention. The damage control concept is appropriate for the treatment of major liver injuries and is associated with significant survival advantages compared with traditional prolonged surgical techniques. Although surgical intervention for hepatic trauma is not as common now as it was in the past, current trauma surgeons should be familiar with the emergency surgical skills necessary to manage complex hepatic injuries, such as packing, Pringle maneuver, selective vessel ligation, resectional debridement, and parenchymal sutures. The present review presents emergency strategies and trends in the management of liver trauma.
关键词: liver trauma nonoperative management operative management
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期
• Current intensification trends in the Rio de la Plata need urgent re-direction.
•Integrated crop-livestock systems reconcile food production with ecosystem services.
•Case studies validate recoupling as a sustainable way to ecological intensification.
The Rio de la Plata region comprises central Argentina, Uruguay, and southern Brazil. Modern agriculture developed around 1900 with recent decades being characterized by the advance of cropping areas over native grasslands. Highly specialized agriculture has decoupled crop and livestock production but has succeeded in intensifying yields. However, significant losses of ecosystem services have been reported. Thus, questions have been raised on the sustainability of this pathway. A glance at world regions that have experienced similar trends suggests that an urgent course correction is needed. A major concern has been the lack of diversity in regions with highly specialized agriculture, promoting renewed interest in integrated crop-livestock systems (ICLS), not only because ICLS are more diverse than specialized systems, but also because they are rare examples of reconciliation between agroecosystem intensification and environmental quality. Consequently, this paper discusses alternatives to redesign multifunctional landscapes based on ICLS. Recent data provide evidence that recoupling crop and animal production increases the resilience of nutrient cycling functions and economic indicators to external stressors, enabling these systems to face climate-market uncertainty and reconcile food production with the provision of diverse ecosystem services. Finally, these concepts are exemplified in case studies where this perspective has been successfully applied.
From Green to Sustainability—Trends in the Assessment Methods of Green Buildings
Steve Hsueh-Ming Wang,Paula Williams,Jing Shi,Huojun Yang
《工程管理前沿(英文)》 2015年 第2卷 第2期 页码 114-121 doi: 10.15302/J-FEM-2015018
关键词: green sustainability buildings assessment methods rating systems
Age-related trends in genetic parameters for wood properties in
Chao SUN, Meng LAI, Shougong ZHANG, Xiaomei SUN
《农业科学与工程前沿(英文)》 2017年 第4卷 第4期 页码 482-492 doi: 10.15302/J-FASE-2017184
关键词: early selection genetic variation wood properties SilviScan Larix kaempferi
金钦汉
《中国工程科学》 2001年 第3卷 第1期 页码 85-88
科学仪器的创新是知识创新和技术创新的重要内容。发展科学仪器应当视为国家战略。分析仪器是科学仪器的重要组成部分。分析仪器工业是高技术信息产业。分析仪器的发展是现代科学、经济和社会发展的重要基础和推动力之一。分析仪器的主要应用领域正向生物医学领域转移。分析仪器本身将不断微型化、智能化。但人类向时间和空间的两个极限挑战所需的高级精密仪器也不容忽视。生命过程、生产、科研和社会活动大量需要的将是在线、非侵入、非损坏、原位、实时、多维分析仪器。我国分析仪器与国外的差距在扩大的趋势值得髙度重视。改变这种局面的要素之一是领导者、企业家和科技工作者都必须改变对科学仪器的旧观念。
Research Trends in Fischer--Tropsch Catalysis for Coal to Liquids Technology
Emiel J. M. Hensen,Peng Wang,Wayne Xu
《工程管理前沿(英文)》 2016年 第3卷 第4期 页码 321-330 doi: 10.15302/J-FEM-2016051
关键词: Fischer–Tropsch FTS CTL Fe catalyst iron carbide computational modeling
戴复东
《中国工程科学》 1999年 第1卷 第2期 页码 6-18
世界上的人造物得以实现是需要与可能的结合,高层与超高层建筑的产生也不能违背这一规律。人类从古以来就有要高,登高和居高的精神和物质愿望和需要,但它变成高层超高层建筑的现实却是:在19世纪末至20世纪初产业革命后,生产力大发展,大城市快速发展;钢铁工业的发展,钢材被大量应用于建筑;电梯的发明。当时只有美国同时具备这三项条件。高层建筑产生以后就以迅猛的方式往高及超高层建筑发展。目前它的最高高度向460m冲刺。它的发展大约可以分成四个阶段,即初始摸索、纵深探索、现代主义、成熟时期。前不久,由于亚洲及西太平洋经济的发展,这一地区高层、超高层建筑有了较大发展,但它们毕竟是经济的产物。今后它要走生态化道路,在工程材料及力学上仍有广阔的前景,但高究竟会有什么负面问题?高度是否有上限?上限在哪里?是值得研究与探讨的。
A Further Discussion on Trends in the Development of Advanced Manufacturing Technology
YANG Shu-zi, WU Bo, LI Bin
《机械工程前沿(英文)》 2006年 第1卷 第1期 页码 1-5 doi: 10.1007/s11465-005-0002-y
This paper is a supplement to Trends in the Development of Advanced Manufacturing Technology (Yang and Wu in Chin. J. Mech. Eng., 39: 73, 2003) but delves deeper into it. It first points out the strategic status of manufacturing industry in state development. Then, a detailed analysis is given on the features and trends in the development of advanced manufacturing technology in a total of 12 points from three aspects: precision, extreme, and culture from the aspect of the product itself; green, rapidness, saving, and efficiency during the manufacturing process; and digit, auto, integration, networking, and intelligence in view of the manufacturing method. In addition, it emphasizes that all the above aspects should be based on two base points: manufacture and machinery. Finally, it puts forth the guiding ideologies for the development of advanced manufacturing technology and the aspects China should give priority to in development, while stressing on the principles of independence, innovation and human orientation.
关键词: Development development integration networking orientation
Yandan FU, Jiahui KANG, Ziyue LI, Xuejun LIU, Wen XU
《农业科学与工程前沿(英文)》 2021年 第8卷 第4期 页码 559-567 doi: 10.15302/J-FASE-2020344
关键词: atmospheric deposition ecological impacts nitrogen sources nutrients Yangtze River Delta
标题 作者 时间 类型 操作
Catalysis of semihydrogenation of acetylene to ethylene: current trends, challenges, and outlook
期刊论文
Emerging trends in self-healable nanomaterials for triboelectric nanogenerators: A comprehensive review
期刊论文
CONCENTRATIONS AND FLUXES OF DISSOLVED NUTRIENTS IN THE YANGTZE RIVER: LONG-TERM TRENDS AND ECOLOGICAL
期刊论文
Research Trends in Information Technology Applications in Construction Safety Engineering and Management
Mirosɬaw J. Skibniewski
期刊论文
LAND-USE INTENSIFICATION TRENDS IN THE RIO DE LA PLATA REGION OF SOUTH AMERICA: TOWARD SPECIALIZATION
期刊论文
From Green to Sustainability—Trends in the Assessment Methods of Green Buildings
Steve Hsueh-Ming Wang,Paula Williams,Jing Shi,Huojun Yang
期刊论文
Age-related trends in genetic parameters for wood properties in
Chao SUN, Meng LAI, Shougong ZHANG, Xiaomei SUN
期刊论文
Research Trends in Fischer--Tropsch Catalysis for Coal to Liquids Technology
Emiel J. M. Hensen,Peng Wang,Wayne Xu
期刊论文
A Further Discussion on Trends in the Development of Advanced Manufacturing Technology
YANG Shu-zi, WU Bo, LI Bin
期刊论文