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| 1 | 页岩气开采水力压裂诱发四川盆地南部2018年12月M_L5.7地震和2019年1月M_L5.3地震显示文摘2018年12月16日,四川省兴文县发生了M L5.7地震(北纬28.239°,东经104.922°)。两个多星期以后的2019年1月3日,在其西边8km处发生了M L5.3地震。这两次地震事件是目前为止在长宁页岩气区块发生的最大的、最具破坏性的地震事件,对附近的农舍和建筑物造成了严重的破坏。虽然中国地震局发布这两个地震事件的常规处理得到震源深度都大于5km,但基于广义剪切粘贴法(gCAP)方法的矩心矩张量解,发现震源深度非常浅(M L5.7和M L5.3地震的震源深度分别为3km和1.8km)。此外,这两个地震事件都非常接近水力压裂(HF)井场,周围有很多水力压裂井在地震时正在进行压裂作业。一系列的证据链条表明这些地震是由2.5~3km深度处的水力压裂所诱发。证据包括地震和水力压裂井段之间的时空相关性、地震活动统计特性,以及触发那些现今应力场下产状不利于发生摩擦滑动的断层所需的流体超压力。自2014年开始规模化水力压裂以来,长宁区块至今共观察到11次M L≥4.0地震事件(其中包括3次M L≥5.0地震)。与常规构造地震活动相比,这些地震活动的大森型余震活动非常低。此外,对于触发M W≥3.5地震事件,所需流体超压力为0.3~5.8MPa。水力压裂在致裂区间以外由孔弹性效应产生的应力变化一般远小于1MPa。这些断层大多是未知的,而且在目前的构造应力场作用下,其产状不利于发生滑动破裂,所以流体超压力驱动已存在断层的再活化被认为是诱发这些异常的中强地震的原因。 | X.L.Lei Z.W.Wang J.R.Su 王志伟(译) 雷兴林(校) | 2020 | 世界地震译丛2020，51，2： | 4 |
| 2 | Evolution mechanisms of microstructure and mechanical properties in a friction stir welded ultrahigh-strength quenching and partitioning steel显示文摘Ultrahigh-strength quenching and partitioning(Q&P) steels have attracted strong interests in the auto manufactory,while the comprehensive understanding in the microstructure and mechanical behavior of their welded joints is highly needed to enrich their applications.In the present work,it is designed to make an insight into these imperative conundrums.Equal strength Q&P 1180 steel joints to parent metal were successfully fabricated via friction stir welding(FSW) technique under different parameters. Apparent hardening and softening were observed in stir zone(SZ) and heat-affected zone(HAZ) respectively,whose microstructures strongly depended on the peak temperature and cooling rate during welding.The formation of fresh martensite was the main mechanism for the SZ hardening,while the decomposition of metastable phases played key roles in the microhardness drop of the HAZ.A heat source zone-isothermal phase transition layer model was proposed to clarify the impregnability of the joint strength under parameter variation.The dual-phase structure,nano-carbide particles,tempered initial martensite,and ultrafine-grained ferrite synergistically improved the strain hardening ability of the HAZ,which eventually resulted in the equal strength FSW joints. | Z.W.Wang J.F.Zhang G.M.Xie L.H.Wu H.Zhang P.Xue D.R.Ni B.L.Xiao Z.Y.Ma | 2022 | Journal of Materials Science & Technology2022，，7： | 3 |
| 3 | 查看详情显示文摘 | Z.Chen R.J.Xiao C.Ma Y.B.Qin H.L.Shi Z.W.Wang Y.J.Song Z.Wang H.F.Tian H.X.Yang and J.Q.Li | | 0，，04： | 1 |
| 4 | Internal noise stochastic resonance of synthetic gene network显示文摘 | Z.W.Wang Z.H.Hou H.W.Xin | | 0，，： | 1 |
| 5 | 查看详情显示文摘 | Z.W.Wang N.Zhang M.H.Hu | | 0，，02： | 1 |
| 6 | 查看详情显示文摘 | Z.W.Wang Q.J.Han M.H.Hu D.Yang and J.Y.Li | | 0，，01： | 1 |
| 7 | Phased Array Feed Experiments and Galactic HI Observations显示文摘The Phased Array Feed(PAF)is considered as one of the next generation receivers for radio telescopes,which can significantly enlarge the instantaneous Field-of-View of large aperture single dish radio telescopes and enable more flexible observing configurations.Study efforts on PAF development for radio telescopes have been made for more than two decades and have become more and more applicable.We report the development of an ambient-temperature 19 element L-band PAF system and the experimental results including its far field beam pattern and system temperature measurement,which achieve the expectations.Implementing the aperture array beam-forming method,we demonstrate a wide-field Galactic HI observations in the radio camera mode.The results indicate that this system might be applicable for strong Galactic transient detections.This system could be directly equipped to large telescopes like the Five-hundred-meter Aperture Spherical radio Telescope(FAST)and FAST array in the future. | B.Liu H.W.Xi D.J.Ding Z.W.Wang S.H.Yu Y.Zhu L.Yu X.Zhang J.L.Li L.J.Liu Q.Su Y.Wu C.J.Jin B.Peng | 2023 | Research in Astronomy and Astrophysics2023，23，8： | 0 |
| 8 | Variational calculation of the Intrashell 2p^2 ~3P^e State for Heliumlike F^( 7+) ion显示文摘Doubly excited intrashell 2p 2 3P e state in heliumlike F 7+ ion is calculated by using the modified configuration interaction wave function. Using the modified Slater type wave function having up to 362 terms, the energy position of the discrete 2p 2 3P e state in F 7+ is determined to be -18.812 629 78 a.u., Several expectation values of r i,r -1 12 and r 12 are also given in the present work. The present results indicate that the modified Slater type wave function in which r < and r > coordinates are incorporated is effective and powerful for the description of the 2p 2 3P e state showing strong correlation effect in two electron systems. | GUANG Xiao xu 1, WANG Zhi wen(Z.W.Wang) 2(1.Wuhan Institute of Physics and Mathematics, Chinese Academy of Science, Wuhan 430071 2.Department of Physics,Liaoning Normal University, Dalian 116029) | 2000 | 原子与分子物理学报2000，17，4： | 0 |
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