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Principle and curve of planetary indexing cam mechanisms

LIU Ming-tao, ZHANG Ce, YANG Yu-hu

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 475-478 doi: 10.1007/s11465-006-0063-6

Abstract: A new type of planetary indexing cam mechanism called type !c is presented.

Keywords: continuity     planetary     average transmission     symmetry     intermittent    

Analysis of planetary gear transmission in non-stationary operations

Fakher CHAARI, Mohamed Slim ABBES, Fernando Viadero RUEDA, Alfonso Fernandez del RINCON, Mohamed HADDAR

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 88-94 doi: 10.1007/s11465-013-0361-8

Abstract:

Planetary gearboxes operate usually in non-stationary conditions generated mainly by variable loadsIn order to understand the dynamic behavior of planetary gearboxes in such conditions, a mathematic model

Keywords: planetary gearbox     non-stationary conditions     variable load     dynamic response     time frequency analysis    

Planet position errors in planetary transmission: Effect on load sharing and transmission error

Miguel IGLESIAS, Alfonso FERNáNDEZ, Ana DE-JUAN, Ramón SANCIBRIáN, Pablo GARCíA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 80-87 doi: 10.1007/s11465-013-0362-7

Abstract: , has been extended with internal meshing features, and thus increasing its capabilities to include planetaryThe parameters and characteristics of the planetary transmission used in the paper are introduced.Two different configurations for the planetary transmission are used, attending to the fixed or floating

Keywords: gear     planetary     epicyclic     transmission     load sharing     transmission error    

DART Mission Shows Potential for Planetary Defense by Smashing Asteroid into New Orbit

Chris Palmer

Engineering 2023, Volume 24, Issue 5,   Pages 7-9 doi: 10.1016/j.eng.2023.03.002

Developing a new agenda for increased food and climate security

Frontiers of Agricultural Science and Engineering doi: 10.15302/J-FASE-2023514

Abstract:

● The urgent need to address increasing worldwide food and climate insecurity.

Keywords: climate resilience     food security     human health     planetary health     regenerative agriculture    

Advantageous mechanochemical synthesis of copper(I) selenide semiconductor, characterization, and properties

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 3,   Pages 433-442 doi: 10.1007/s11705-021-2066-6

Abstract: selenide-nanocrystalline semiconductor was synthesized via one-step mechanochemical synthesis after 5 min milling in a planetary

Keywords: Cu2Se     berzelianite     nanocrystalline semiconductor     mechanochemical synthesis     planetary ball    

Coordinated shift control of nonsynchronizer transmission for electric vehicles based on dynamic tooth alignment

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 887-900 doi: 10.1007/s11465-021-0653-3

Abstract: A two-speed planetary NSAMT is taken as an example to carry out comparative simulations and bench experiments

Keywords: electric vehicle     nonsynchronizer automated mechanical transmission (NSAMT)     planetary gear     coordinated    

Research Status and Future Development of Deep Space Security

Wu Ke, Zhang Zhe, Yang Wenfei, He Jianfeng, Zhang Tianzhu, Jian Kangkang, Wu Weiren

Strategic Study of CAE 2022, Volume 24, Issue 4,   Pages 240-248 doi: 10.15302/J-SSCAE-2022.04.023

Abstract: Planetary protection mainly faces the challenges of pollution and impact of deep space spacecraft, andThis has led to early research on planetary conservation.NASA has the highest degree of specification in planetary conservation work and has a complete planetary;">Planetary protection faces both legislative and technical challenges.The impact of deep-space spacecraft with planetary surfaces can have serious implications for planetary

Keywords: deep space security     space radiation threat     planetary protection     space heritage protection     space legislation    

Planetary Homeostasis of Reactive Nitrogen Through Anaerobic Ammonium Oxidation

Guibing Zhu,Bangrui Lan,Shuci Liu,Cameron M. Callbeck,Shanyun Wang,Liping Jiang,Asheesh Kumar Yadav,Jan Vymazal,Mike S. M. Jetten,Ganlin Zhang,Yongguan Zhu,

Engineering doi: 10.1016/j.eng.2023.09.013

Abstract: The availability of nitrogen (N) is crucial for both the productivity of terrestrial and aquatic ecosystems globally. However, the overuse of artificial fertilizers and the energy required to fix nitrogen have pushed the global nitrogen cycle (N-cycle) past its safe operating limits, leading to severe nitrogen pollution and the production of significant amounts of greenhouse gas nitrous oxide (N2O). The anaerobic ammonium oxidation (anammox) mechanism can counteract the release of ammonium and N2O in many oxygen-limited situations, assisting in the restoration of the homeostasis of the Earth’s N biogeochemistry. In this work, we looked into the characteristics of the anammox hotspots’ distribution across various types of ecosystems worldwide. Anammox hotspots are present at diverse oxic–anoxic interfaces in terrestrial systems, and they are most prevalent at the oxic–anoxic transition zone in aquatic ecosystems. Based on the discovery of an anammox hotspot capable of oxidizing ammonium anoxically into N2 without N2O by-product, we then designed an innovative concept and technical routes of nature-based anammox hotspot geoengineering for climate change, biodiversity loss, and efficient utilization of water resources. After 15 years of actual use, anammox hotspot geoengineering has proven to be effective in ensuring clean drinking water, regulating the climate, fostering plant and animal diversity, and enhancing long-term environmental quality. The sustainable biogeoengineering of anammox could be a workable natural remedy to resolve the conflicts between environmental pollution and food security connected to N management.

Keywords: biogeochemical N-cycle     oxic–anoxic interface     nature-based solution     biogeoengineering     nitrogen sustainable development    

Long-term observation of air pollution-weather/climate interactions at the SORPES station: a review and outlook

Aijun Ding,Wei Nie,Xin Huang,Xuguang Chi,Jianning Sun,Veli-Matti Kerminen,Zheng Xu,Weidong Guo,Tuukka Petäjä,Xiuqun Yang,Markku Kulmala,Congbin Fu

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 5, doi: 10.1007/s11783-016-0877-3

Abstract: The concept design and detailed information of the SORPES station are introduced. Main scientific findings based 5-year measurements at the station are summarized. The future outlook of the development plan and its implications are discussed. The results improved understanding of interaction of physical and chemical processes. More SORPES-type stations are need to in different regions in China and the world. This work presents an overall introduction to the Station for Observing Regional Processes of the Earth System – SORPES in Nanjing, East China, and gives an overview about main scientific findings in studies of air pollution-weather/climate interactions obtained since 2011. The main results summarized in this paper include overall characteristics of trace gases and aerosols, chemical transformation mechanisms for secondary pollutants like O , HONO and secondary inorganic aerosols, and the air pollution – weather/climate interactions and feedbacks in mixed air pollution plumes from sources like fossil fuel combustion, biomass burning and dust storms. The future outlook of the development plan on instrumentation, networking and data-sharing for the SORPES station is also discussed.

Keywords: Secondary pollution     Ground-based measurement     Planetary boundary layer meteorology     Earth system processes    

Survey of autonomous guidance methods for powered planetary landing Review

Zheng-yu Song, Cong Wang, Stephan Theil, David Seelbinder, Marco Sagliano, Xin-fu Liu, Zhi-jiang Shao,zycalt12@sina.com

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 5,   Pages 649-808 doi: 10.1631/FITEE.1900458

Abstract: Unlike the kilometer-level precision for previous activities, the position accuracy of future planetary

Keywords: 自主制导方法;定点软着陆;动力下降;非线性规划    

Title Author Date Type Operation

Principle and curve of planetary indexing cam mechanisms

LIU Ming-tao, ZHANG Ce, YANG Yu-hu

Journal Article

Analysis of planetary gear transmission in non-stationary operations

Fakher CHAARI, Mohamed Slim ABBES, Fernando Viadero RUEDA, Alfonso Fernandez del RINCON, Mohamed HADDAR

Journal Article

Planet position errors in planetary transmission: Effect on load sharing and transmission error

Miguel IGLESIAS, Alfonso FERNáNDEZ, Ana DE-JUAN, Ramón SANCIBRIáN, Pablo GARCíA

Journal Article

DART Mission Shows Potential for Planetary Defense by Smashing Asteroid into New Orbit

Chris Palmer

Journal Article

Developing a new agenda for increased food and climate security

Journal Article

Advantageous mechanochemical synthesis of copper(I) selenide semiconductor, characterization, and properties

Journal Article

Coordinated shift control of nonsynchronizer transmission for electric vehicles based on dynamic tooth alignment

Journal Article

Research Status and Future Development of Deep Space Security

Wu Ke, Zhang Zhe, Yang Wenfei, He Jianfeng, Zhang Tianzhu, Jian Kangkang, Wu Weiren

Journal Article

Planetary Homeostasis of Reactive Nitrogen Through Anaerobic Ammonium Oxidation

Guibing Zhu,Bangrui Lan,Shuci Liu,Cameron M. Callbeck,Shanyun Wang,Liping Jiang,Asheesh Kumar Yadav,Jan Vymazal,Mike S. M. Jetten,Ganlin Zhang,Yongguan Zhu,

Journal Article

Long-term observation of air pollution-weather/climate interactions at the SORPES station: a review and outlook

Aijun Ding,Wei Nie,Xin Huang,Xuguang Chi,Jianning Sun,Veli-Matti Kerminen,Zheng Xu,Weidong Guo,Tuukka Petäjä,Xiuqun Yang,Markku Kulmala,Congbin Fu

Journal Article

Survey of autonomous guidance methods for powered planetary landing

Zheng-yu Song, Cong Wang, Stephan Theil, David Seelbinder, Marco Sagliano, Xin-fu Liu, Zhi-jiang Shao,zycalt12@sina.com

Journal Article