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极端质量比旋近数据分析方法研究综述

北京大学学报(自然科学版) 2024年

作者：邹晓博 soumya mohanty 谢群英陈弦罗洪刚刘玉孝韩文标矫佳庚张学昊赵少东郭意扬王瀚之金书竹北京大学物理学院兰州大学理论物理中心甘肃省理论物理重点实验室中国科学院大学国际理论物理中心(亚太地区) 中国科学院上海天文台中国科学院数学与系统科学研究院科学与工程计算国家重点实验室兰州大学物理与科学技术学院中国科学院晨兴数学中心 University of Texas rio Grande Valley

极端质量比旋近(Extrem Mass-ratio Inspiral， EMrI)是指质量比在104～107之间的双星系统，其中小质量天体被捕获后绕大质量黑洞旋近，期间损失的能量以引力波的形式向外辐射。旋近结束前的最后一年估计能产生105个旋近周期，因此可提... 详细信息

极端质量比旋近(Extrem Mass-ratio Inspiral， EMrI)是指质量比在104～107之间的双星系统，其中小质量天体被捕获后绕大质量黑洞旋近，期间损失的能量以引力波的形式向外辐射。旋近结束前的最后一年估计能产生105个旋近周期，因此可提供丰富的引力波相位演化信息。小质量天体处在大质量黑洞的强引力环境中，运动轨迹能反映大质量黑洞周围的时空结构，其波形可用来限制引力理论、无毛定理等；大质量黑洞一般处在星系中心，星系所处的天文学环境会在波形中留下痕迹；多个波源能给出大黑洞的质量、自旋分布，可用于限制宇宙演化和星系演化等。基于上述科学意义，EMrI成为空间引力波计划LISA、太极和天琴的重要观测目标，EMrI的数据分析就成为一个重要任务。EMrI波形的高维度和复杂性对数据分析方法较要求高，目前还没有公认的满意答案。首先回顾了LISA模拟数据挑战赛中提出的方法和最近的讨论，然后基于自身研究总结了难点、提出了改进方法，最后讨论了之后的发展可能用到的几个线索。

关键词：极端质量比旋近信号探测参数估计频谱法匹配滤波

Fatal intracranial bleedings in a viper bite:A case report

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Chinese Journal of Traumatology 2023年第2期26卷 121-124页

作者： Alagarasan Naveen Manas ranjan Sahu Manoj Kumar.mohanty Kimi soumya Padhi Ashis Patnaik Department of Forensic Medicine&Toxicology All India Institute of Medical Sciences(AMS)BhubaneswarOdishaIndia Department of Neurosurgery Al India Institute of Medical Sciences(AIIMS)BhubaneswarOdishaIndia

Viper bite envenomation represents a significant occupational hazard among agricultural workers in India.The viper bite envenomation is usually suspected when a patient presents with predominant local symptoms at the bitten site,including pain,swelling,and necrosis.Further,systemic findings such as diffuse intravascular coagulation,hypotension,and shock may alert physicians of viper bite envenomation rather than a neurotoxic snake bite.However,cerebral complications are rare in viper bites but may potentially fatal.Central nervous system involvement in a viper bite is either due to neurotoxins or hemorrhagins present in the venom,which may induce cerebral thrombosis,ischemia,infarction,and hemorrhage.Here we present a case of a previously healthy adult male who succumbed to extensive subarachnoid,intracerebral,and intraventricular hemorrhages involving bilateral cerebral hemispheres following viper snake bite envenomation.This report highlights the importance of anticipating cerebral complications in viper bite envenomation,a rare occurrence.It also emphasizes the need for early antisnake venom administration to prevent and control systemic envenomation and its complications.

关键词： Snake bite Viper Intracerebral hemorrhage Subarachnoid hemorrhage Anti-snake venom

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Life cycle greenhouse gas emissions from five contrasting rice production systems in the tropics

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Pedosphere 2023年第6期33卷 960-971页

作者： Pradeep K.DASH Pratap BHATTACHArYYA soumya r.PADHY Amaresh K.NAYAK Annie POONAM Sangita mohanty Crop Production Division Indian Council of Agriculture Research(ICAR)-National Rice Research Institute(NRRI)GuttackOdisha 753006India

Carbon footprint (CF) quantification of major rice production systems (rPSs) is a prerequisite for developing strategies for climate change mitigation in agriculture. Total life cycle greenhouse gas emissions (LC-GHGs) from rice production to consumption might provide precise CFs for rPSs. Therefore, we assessed three segments (pre-farm, on-farm, and post-farm) of LC-GHGs under five major contrasting rPSs, i.e., aerobic rice (Ar), shallow lowland rice(SLr), system of rice intensification (SrI), deep water rice (DWr), and zero-tilled direct-seeded rice (ZTr), in India to determine the corresponding CFs.Carbon footprint was the lowest for ZTr, while LC-GHGs were the lowest for Ar. Therefore, Ar is an adequate option for short-term reduction of GHG emissions. However, ZTr might be promoted by incentives as a long-term strategy. Among segmental LC-GHGs, on-farm GHG emissions contributed less than the other two segmental GHG emissions. The post-farm (i.e., farm gate to consumption) segment contributed the largest proportion (54%–69%) of total LC-GHGs, followed by pre-farm (i.e., cradle to farm) segment (21%–27%) and on-farm operation (11%–23%). These findings suggest that post-farm components that contribute to maximum GHG emissions must be scientifically tackled with proactive policy initiatives. However, the data of this segment are limited and scattered. Therefore, real-time assessment of GHG emissions during post-farm operation and input transportation from cradle to farm requires more precise quantification. Although CF in SrI was higher, this system had the potential to achieve higher yields and better soil carbon storage. Therefore,SrI may be encouraged from the perspectives of food security and long-term sustainability by reducing GHG emissions by three to four times.

关键词： carbon-equivalent emission carbon footprint climate change mitigation global warming management practice soil carbon stock:

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Coordination of Overcurrent relay in Distributed System for Different Network Configuration

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Journal of Power and Energy Engineering 2015年第10期3卷 1-9页

作者： Niraj Kumar Choudhary soumya ranjan mohanty ravindra Kumar Singh Electrical Engineering Department Motilal Nehru National Institute of Technology Allahabad Allahabad India

This paper presents a study on protection coordination of over current relays (OCrs) in a distributed system by considering its different operating modes. Two different case studies which are considered in present work for protection coordination include: (i) DG interfaced distribution system in grid connected mode and (ii) DG interfaced distribution system in islanded mode of operation. The proposed approach is tested on the Canadian urban benchmark distribution system consisting of 9 buses. On the occurrence of fault, level of fault current changes which in turn changes the operating time of various OCrs. Therefore, it is important to calculate and suggest method of the relay setting in order to minimize the operating time of relays and also to avoid its mal-operation. In this paper, the protection scheme is optimally designed by taking into account the above mentioned conditions. The operating time of relays can be decreased and, at the same time, coordination can be maintained by considering the optimum values of time dial setting (TDS). Genetic Algorithm (GA) has been used for determining the optimum values of TDS and hence operating time.

关键词： Distributed Generator (DG) Over Current relays (OCrs) Time Dial Setting (TDS) Genetic