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Attitude-adjusting dynamical behavior of cubic rover on low-gravity testbed

Astrodynamics 2024年第1期8卷 149-159页

作者： Bowen Jiang muhammad talha hussain Xiangyuan Zeng School of Automation Beijing Institute of TechnologyBeijing100081China

Cubic rovers that traverse by hopping systems are promising in low-gravity *** several analyses of the control methods and mobility of the cubic rover are available,investigations of its attitude-adjusting behavior are still *** study derives the dynamic equations of the two attitude-adjusting modes of the cubic rover,referred to as walking and *** relationships between the speed threshold and rotation angle of the cubic rover were investigated in both rigid and regolith environments using a self-designed low-gravity *** studies were conducted by considering the experimental and simulated *** results of this study can be interesting for roving mission planning when exploring planetary moons and small celestial bodies.

关键词： low-gravitytestbed attitude-adjusting motion cubic rover experimental study

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Response of Contrasting Rice Genotypes to Zinc Sources under Saline Condition

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Phyton-International Journal of Experimental Botany 2023年第5期92卷 1361-1375页

作者： muhammad Jan muhammad Anwar-Ul-Haq talha Javed Sadam hussain Ilyas Ahmad muhammad Ashraf Sumrah Javed Iqbal Babar hussain Babar Aqsa Hafeez muhammad Aslam muhammad Tahir Akbar Marjan Aziz Khadiga Alharbi Izhar Ullah Department of Soil and Environmental Sciences Ghazi UniversityDera Ghazi Khan32200Pakistan Institute of Soil and Environmental Sciences University of AgricultureFaisalabad38040Pakistan Department of Agronomy University of AgricultureFaisalabad38040Pakistan College of Agronomy Northwest A&F UniversityYangling712100China Pesticide Quality Control Lab MultanPunjab59300Pakistan Barani Agricultural Research Institute Chakwal48800Pakistan Soil and Water Testing Laboratory for Research Dera Ghazi Khan32200Pakistan Agronomic Research Institute Ayub Agricultural Research InstituteFaisalabad38000Pakistan Department of Plant Sciences Quaid-i-Azam UniversityIslamabad45320Pakistan Soil Fertility(Field) Multan59300Pakistan Department of Biology College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Queensland University of Technology QueenslandAustralia

Abiotic stresses are among the major limiting factors for plant growth and crop *** these,salinity is one of the major risk factors for plant growth and development in arid to semi-arid *** of salt tolerant crop genotypes is one of the imperative approaches to meet the food demand for increasing *** current experiment was carried out to access the performance of different rice genotypes under salinity stress and Zinc(Zn)*** rice genotypes were grown in a pot experiment and were exposed to salinity stress(7 dS m^(−1)),and Zn(15 mg kg^(-1)soil)was applied from two sources,ZnSO4 and Zn-EDTA.A control of both salinity and Zn was kept for *** showed that based on the biomass accumulation and K^(+)/Na^(+)ratio,KSK-133 and BAS-198 emerged as salt tolerant and salt sensitive,***,based on the Zn concentration,BAS-2000 was reported as Zn-in-efficient while IR-6 was a Zn-efficient *** results also revealed that plant growth,relative water content(RWC),physiological attributes including chlorophyll contents,ionic concentrations in straw and grains of all rice genotypes were decreased under salinity ***,salt tolerant and Zn-in-efficient rice genotypes showed significantly higher shoot K^(+)and Zn concentrations under saline *** application significantly alleviates the harmful effects of salinity by improving morpho-physiological attributes and enhancing antioxidant enzyme activities,and the uptake of K and *** beneficial effect of Zn was more pronounced in salt-tolerant and Zn in-efficient rice genotypes as compared with salt-sensitive and Zn-efficient *** sum,our results confirmed that Zn application increased overall plant’s performance under saline conditions,particularly in Zn in-efficient and tolerant genotypes as compared with salt-sensitive and Zn efficient rice genotypes.

关键词： Agronomic efficiency antioxidant enzymes:physiology Oryza sativa salinity Zn efficient

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Improving Quantitative and Qualitative Characteristics of Wheat (Triticum aestivum L.) through Nitrogen Application under Semiarid Conditions

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Phyton-International Journal of Experimental Botany 2023年第4期92卷 1001-1017页

作者： muhammad Rafiq muhammad Saqib Husnain Jawad talha Javed Sadam hussain muhammad Arif Baber Ali muhammad Sultan Ali Bazmi Ghulam Abbas Marjan Aziz Mohammad Khalid Al-Sadoon Aneela Gulnaz Sobhi F.Lamlom muhammad Azeem Sabir Jameel Akhtar Agronomic Research Institute Ayub Agricultural Research InstituteFaisalabad38850Pakistan Depertment of Agronomy University of AgricultureFaisalabad38040Pakistan Department of Agronomy Northwest A&F UniversityYangling712100China Department of Plant Sciences Quaid-i-Azam UniversityIslamabad45320Pakistan Fodder Research Institute Sargodha Sargodha40100Pakistan Department of Agricultural Engineering Barani Agricultural Research InstituteChakwal48800Pakistan Department of Zoology College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia Department of Biotechnology Yeungnam UniversityGyeongbuk38641Korea Plant Production Department Faculty of Agriculture Saba BashaAlexandria UniversityAlexandria21531Egypt Department of Forestry Range and Wildlife ManagementThe Islamia University of BahawalpurBahawalpur63100Pakistan

Nitrogen(N),the building block of plant proteins and enzymes,is an essential macronutrient for plant functions.A field experiment was conducted to investigate the impact of different N application rates(28,57,85,114,142,171,and 200 kg ha^(−1))on the performance of spring wheat(***-2016)during the 2017–2018 and 2018–2019 growing seasons.A control without N application was kept for *** years mean data showed optimum seed yield(5,461.3 kg ha^(−1))for N-application at 142 kg ha^(−1) whereas application of lower and higher rates of N did not result in significant and economically higher seed yield.A higher seed yield was obtained in the 2017–2018(5,595 kg ha^(−1))than in the 2018–2019(5,328 kg ha^(−1))growing seasons under an N application of 142 kg ha^(−1).It was attributed to the greater number of growing degree days in the first(1,942.35°C days)than in the second year(1,813.75°C).Higher rates of N(171 and 200 kg ha^(−1))than 142 kg ha^(−1) produced more number of tillers(i.e.,948,300 and 666,650 ha^(−1),respectively).However,this increase did not contribute in achieving higher *** of 142,171,and 200 kg ha^(−1) resulted in 14.15%,15.0%and 15.35%grain protein concentrations in comparison to 13.15%with the application of 114 kg ha^(−1).It is concluded that the application of N at 142 kg ha^(−1) could be beneficial for attaining higher grain yields and protein concentrations of wheat cultivar Ujala-2016.

关键词： Economical yield growing degree days nitrogen Ujala-2016 wheat

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Attitude Control Experiments of Cubic Rover on Low-Gravity Testbed

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Transactions of Nanjing University of Aeronautics and Astronautics 2022年第2期39卷 143-151页

作者： ZENG Xiangyuan JIANG Bowen hussain muhammad talha JIANG Jianxun YANG Runyi School of Automation Beijing Institute of TechnologyBeijing 100081P.R.China System Engineering Research Institute China State Shipbuilding CorporationBeijing 100094P.R.China

In-situ exploration of asteroid surfaces is of great scientific *** actuated rovers have been released to asteroid surfaces but without enough *** investigate the attitude control characteristics of the cubic rover for asteroid surface exploration,a series of experiments are carried out using the self-designed rover and the low-gravity *** experiments focus on two major themes:The minimum flywheel speed for cubic rover to produce a walking motion in different conditions,and the relationship between the rover’s rotation angle and the flywheel speed in twisting *** rover’s dynamical descriptions of the walking and twisting motions are first *** features and design of the low-gravity testbed are then summarized,including its dynamics,setup,and validation.A detailed comparison between the dynamic model and the experimental results is presented,which provides a basic reference of the cubic rover’s attitude control in low-gravity environments.

关键词： cubic rover low-gravity testbed walking motion twisting motion planetary exploration

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低重力环境立方体巡视器姿态调整实验研究

低重力环境立方体巡视器姿态调整实验研究

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第十九届全国非线性振动暨第十六届全国非线性动力学和运动稳定性学术会议（NVND2023）

作者：姜博文 hussain M.talha 曾祥远北京理工大学自动化学院

在小行星探测任务中,通过释放着陆器或巡视器等开展表面探测具有极高的科学回报。相比于轮式探测车,立方体跳跃巡视器能够更好地适应小行星表面微弱且不规则的引力环境。不过目前跳跃式巡视器的运动随机性以及起跳和落地时产生的姿态差... 详细信息

在小行星探测任务中,通过释放着陆器或巡视器等开展表面探测具有极高的科学回报。相比于轮式探测车,立方体跳跃巡视器能够更好地适应小行星表面微弱且不规则的引力环境。不过目前跳跃式巡视器的运动随机性以及起跳和落地时产生的姿态差异,导致其运动可控性不高。针对巡视器着陆和跳跃过程的动力学研究已有较多成果,但关于巡视器的姿态调整运动(翻滚和旋转)研究还很少见,而这对于巡视器获取科学数据至关重要。为此,本文着重研究巡视器在低重力环境下的姿态调整行为规律。首先建立了巡视器翻滚和平面旋转的动力学模型;其次,基于已研制的立方体巡视器模型与低重力模拟平台,详细分析了不同环境参数下巡视器翻滚运动的最低能耗问题、以及巡视器在平面旋转过程中的"回旋"问题;最终,将实验数据与动力学模型仿真结果开展对比分析。该研究可为低重力环境下巡视器的调姿运动行为以及运动控制提供参考。

关键词：立方体巡视器低重力平台调姿运动实验翻滚运动平面旋转运动

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