搜索到1420篇“ SGR“的相关文章
Spin Evolution of the Magnetar SGR J1935+2154
2024年
Fast radio bursts(FRBs)are short pulses observed in radio frequencies usually originating from cosmological distances.The discovery of FRB 200428 and its X-ray counterpart from the Galactic magnetar SGR J1935+2154suggests that at least some FRBs can be generated by magnetars.However,the majority of X-ray bursts from magnetars are not associated with radio emission.The fact that only in rare cases can an FRB be generated raises the question regarding the special triggering mechanism of FRBs.Here we report long time spin evolution of SGR J1935+2154 until the end of 2022.According to v and v,the spin evolution of SGR J1935+2154 could be divided into two stages.The first stage evolves relatively steady evolution until 2020 April 27.After the burst activity in2020,the spin of SGR J1935+2154 shows strong variations,especially for v.After the burst activity in 2022October,a new spin-down glitch with△v/v=(-7.2±0.6)×10^(-6)is detected around MJD 59876,which is the second event in SGR J1935+2154.At the end,spin frequency and pulse profile do not show variations around the time of FRB 200428 and radio bursts 221014 and 221021,which supply strong clues to constrain the trigger mechanism of FRBs or radio bursts.
Ming-Yu GeYuan-Pei YangFang-Jun LuShi-Qi ZhouLong JiShuang-Nan ZhangBing ZhangLiang ZhangPei WangKejia LeeWeiwei ZhuJian LiXian HouQiao-Chu Li
改进的砂泥岩地层中断裂封闭性评价SGR法及应用
2024年
SGR法评价断裂在砂泥岩地层中侧向封闭性时,通常采用统计得到的常数作为下限值,导致评价结果与勘探实践存在着较大的偏差。针对上述问题,采用断裂倾角、断层岩压实成岩时间、目的储层泥质含量和压实成岩时间,确定断裂在砂泥岩地层中侧向封闭所需的最小断层岩泥质含量。研究表明:最小断层泥质含量是基于封闭机理所求的一个变值,解决了SGR法统计采用常数值存在偏差的问题,有效提高了侧向封闭性评价的准确性。将该方法应用于海拉尔盆地贝尔凹陷西部呼和诺尔构造带F3断裂在南二段砂泥岩储层的侧向封闭性评价,获得了测点5、7、8和12—15处F3断裂在南二段砂岩储层内侧向封闭,而其余测点处侧向不封闭的重要认识。该认识与油气主要分布在测点7、8、12、14处的情况吻合。研究成果对含油气盆地砂泥岩地层断层型油气藏分布特征及指明油气勘探方向具有重要借鉴意义。
朱焕来王卫学付广付广
关键词:海拉尔盆地
断层泥比率(SGR)三维模型定量表征断层封闭性分析
2024年
断层封闭性既是地下储气库建库阶段需要重点分析的建库条件与储气库运行期间的重要安全指标,同时也是达容达产的地下储气库进行增压扩容时应该进行研究的重要部分。本文以板南区块白6储气库为例,分析储气库断层分布特征,通过三维地质模型,将断层两端地层属性投影至断层模型上,建立断层泥比率(SGR)三维模型,从而对断层封闭性进行定量表征,并与基于数据计算的断层泥比率(SGR)结果进行对比。结果表明:研究区断层封闭主要为岩性对接封闭与断层岩封闭中的泥岩涂抹封闭。断距较大的F1、F4、F5断层两盘砂泥对接,封闭性较好;F3断层断距较小,断层两端砂泥对接、砂砂对接、泥泥对接三种情况均存在,泥比率整体均在50%之上,封闭性较好;F8断层断距较小,断层两端以泥泥对接、砂泥对接为主,少量位置砂砂对接,泥比率在20%以上,多数位置处于40%以上,封闭性较好;F9断层两侧地层以泥泥对接为主,其中砂泥对接区域泥比率整体在15%左右,封闭性较差。Fault sealing is a critical condition to analyze during the construction phase of underground gas storage facilities and a significant safety indicator during their operation. It is also an important aspect to study when increasing pressure and expanding capacity in gas storage facilities that have reached their designed capacity. This paper takes the Bai-6 gas storage facility in the Ban South Block as an example to analyze the fault distribution characteristics of the gas storage. Through a three-dimensional geological model, the stratigraphic properties at both ends of the faults are projected onto the fault model to establish a three-dimensional Shale Gouge Ratio (SGR) model, thereby quantitatively characterizing fault sealing. The results are compared with the SGR results calculated from data. The results show that fault sealing in the study area is mainly due to lithological juxtaposition sealing and fault roc
吴文杰彭惠雪龙永城
关键词:断层封闭性
低光度活动星系核M87和Sgr A*多波段辐射特性研究
M87和Sgr A*是事件视界望远镜(Event Horizon Telescope,EHT)到目前为止先后公布照片的仅有的两个低光度活动星系核(the low-luminosity active galactic nu...
景锐
关键词:吸积盘喷流活动星系核
基于EVA-SGR矩阵的宁德时代融资策略研究
随着双碳政策的出台以及新能源改革的不断推进,我国新能源汽车行业发展取得巨大成就。动力电池作为新能源汽车的核心零部件,其销量迅猛增长。由于产能不断提升,海外布局加速等原因,动力电池企业的资金需求增加,融资问题日益凸显。将企...
陈佳乐
关键词:融资策略
Temporal and Spectral Characteristics of Persistent Emission and Special Bursts of Magnetar SGR J1935+2154 Based on Insight-HXMT
2024年
In October 2022,the magnetar SGR J1935+2154 entered the active outburst state.During the episode,the InsightHXMT satellite carried out a long observation that lasted for 20 days.More than 300 bursts were detected,and a certain amount of persistent radiation signals were also accumulated.This paper mainly introduces the results of persistent radiation profile folding and period search based on Insight-HXMT data.At the same time,the burst phase distribution characteristics,spectral lag results of burst,the spectral characteristics of zero-lag bursts and the time-resolved spectral evolution characteristics of high-flux bursts are reported.We found that there is no significant delay feature during different energy bands for the bursts of SGR J1935+2154.The observed zero-lag burst does not have a unique spectrum.The time-resolved spectrum of the individual burst has consistent spectral types and spectral parameters at different time periods of the burst.We also find that the burst number phase distribution and the burst photon phase distribution have the same tendency to concentrate in specific regions of the persistent emission profile.
Xue-Feng LuLi-Ming SongMing-Yu GeShuang-Nan ZhangJin-Lu QuCe CaiCong-Zhan LiuCheng-Kui LiYu-Cong FuYing-Chen Xu
基于EVA-SGR模型的Z公司财务战略优化研究
《“十四五”生物经济发展规划》将“面向人民生命健康的生物医药”作为生物经济四大重点领域之一,并对推动医疗健康产业发展作出专门部署。近年来生物制品产业主要面临着高昂的研发成本、生产周期长、市场需求不稳定、价格波动大等问题。...
叶荣森
关键词:财务战略经济增加值
Study on Fault Lateral Sealing Based on SGR Method
2023年
Bozhong A Oilfield is located in the northeast of Huanghekou Sag in the Bohai Bay Basin, and is a complex fault block oilfield. The main oil bearing horizon is the lower Minghuazhen Member, belonging to shallow water delta sedimentation. For the rolling exploration and evaluation of adjacent fault blocks, this paper uses the mudstone smear method to analyze and accurately characterize the lithological contact relationship between the two walls of the fault. Based on the establishment of different reservoir docking modes on the two walls of the fault, the sealing parameters are calculated to evaluate the sealing ability of the fault, thereby evaluating its reservoir formation characteristics, and predicting the height of the oil column. The above methods provide geological basis for further rolling expansion and potential tapping in the study area and surrounding areas, and have guiding significance for exploration and rolling potential tapping in similar blocks in the Bohai Sea.
Xijie WangJianmin ZhangLiande ZhouPengfei MuShicong Lyu
A Note on the Anti-glitch of Magnetar SGR 1935+2154
2023年
The magnetar SGR 1935+2154 is reported to have an anti-glitch,accompanied by fast radio bursts,and transient pulsed radio emission.In the wind braking model,this triplet event tells people that(1) SGR 1935+2154 does not have a strong particle wind and can be approximated by magnetic dipole braking in the persistent state;(2) its antiglitch is due to an enhanced particle wind,similar to the first anti-glitch in magnetars;(3) its transient pulsed radio emission may be due to a decreasing emission beam during the outburst;(4) the enhanced particle acceleration potential and pulsar death line may not be the dominate factor.
H.Tong
关键词:STARS
SGR-PLC在中水回用控制系统中的实例应用
2023年
企业末端治理后的中水再生水回用是节约水资源、循环综合利用极其重要的一环,而中水回用采用的超滤膜(UF)+反渗透(RO)膜工艺是大多数企业的首选,也是目前较为成熟的处理工艺之一。控制系统的设计性能、匹配度,决定了整套系统的运行可靠度,无论是从各处理单元点的控制还是整套系统工艺流程自动化的控制,都是运行的重中之重。结合应用实例详细介绍了SGR-PLC自动控制系统在安徽某化工股份有限公司的高效运行,并就如何更安全可靠地应用在中水回用双膜法系统中,对膜系统运行控制出现的常见问题进行罗列并提出应对措施。
田沛霖刘圣义张建宾文康林田民格
关键词:中水回用

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