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青藏高原东北缘晚第四纪块体划分与运动态势研究 被引量:48
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作者 虢顺民 江在森 张崇立 《地震地质》 EI CSCD 北大核心 2000年第3期219-231,共13页
根据地壳厚度、重磁场特征、晚第四纪活动断裂、地貌差异、断陷盆地、地震活动差异等 ,将研究区作了一、二级块体的划分 ,其中一级块体 7个 ,二级块体 33个。一级块体平面上多数呈长条形 ,剖面上呈梯形、倒梯形 ,少数为多边形、三角形... 根据地壳厚度、重磁场特征、晚第四纪活动断裂、地貌差异、断陷盆地、地震活动差异等 ,将研究区作了一、二级块体的划分 ,其中一级块体 7个 ,二级块体 33个。一级块体平面上多数呈长条形 ,剖面上呈梯形、倒梯形 ,少数为多边形、三角形。二级块体平面上多数呈菱形 ,剖面上呈叠瓦状上冲形 ,少数呈条形或三角形。块体的主要运动形式有 :水平挤压、垂直升降、流展和旋转。块体运动受地壳“压缩 -挤出 -旋转”机制控制 ,即地壳块体受到挤压后产生强烈收缩 ,随后产生地壳块体隆起并产生向东的侧向挤出 ,并在挤出过程中产生块体反时针方向旋转。这一结果对“高分辨率地形变的观测研究和地震预报”有重要的科学意义。 展开更多
关键词 青藏高原 块体划分 运动态热 地震预报 晚第四纪
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Generation of a Four-Particle Cluster State and Perfect Teleportation of an Arbitrary Two-Particle State in an Ion-Trap System 被引量:1
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作者 WANG Xin-Wen YANG Guo-Jian 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第10期588-592,共5页
We propose a scheme for generating a four-particle cluster state in an ion-trap system.The scheme isinsensitive to the thermal motion of the ions,and needs less operations than previous ones.With such a setup,we alsod... We propose a scheme for generating a four-particle cluster state in an ion-trap system.The scheme isinsensitive to the thermal motion of the ions,and needs less operations than previous ones.With such a setup,we alsodemonstrate a procedure for perfectly teleporting an arbitrary two-particle state via a single multipartite entanglementchannel,a four-particle cluster state. 展开更多
关键词 cluster state TELEPORTATION ION-TRAP
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Perturbation to Symmetries and Adiabatic Invariants of Nonholonomic Dynamical System of Relative Motion 被引量:1
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作者 CHENXiang-Wei WANGMing-Quan WANGXin-Min 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第4期577-581,共5页
Based on the theory of symmetries and conserved quantities, the exact invariants and adiabatic invariants of nonholonomic dynamical system of relative motion are studied. The perturbation to symmetries for the nonholo... Based on the theory of symmetries and conserved quantities, the exact invariants and adiabatic invariants of nonholonomic dynamical system of relative motion are studied. The perturbation to symmetries for the nonholonomic dynamical system of relative motion under small excitation is discussed. The concept of high-order adiabatic invariant is presented, and the form of exact invariants and adiabatic invariants as well as the conditions for their existence are given. Then the corresponding inverse problem is studied. 展开更多
关键词 nonholonomic dynamical system of relative motion PERTURBATION exactinvariant adiabatic invariant
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Robust Entanglement for Multiple Trapped Ions in Thermal Motion
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作者 ZHENGShi-Biao 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第2期315-317,共3页
A robust scheme is proposed for producing maximally entangled states for many trapped ions in thermal motion. In the scheme the ions are simultaneously illuminated by two standing-wave laser fields. During the operati... A robust scheme is proposed for producing maximally entangled states for many trapped ions in thermal motion. In the scheme the ions are simultaneously illuminated by two standing-wave laser fields. During the operation the phases of the lasers are inverted, which not only cancels the vibration-dependent parts in the evolution operator, but also suppresses direct off-resonant coupling of the internal states. Thus, our scheme allows the production of entanglement for hot trapped ions with laser fields of high intensity, which makes the entanglement speed extremely high. 展开更多
关键词 ENTANGLEMENT trapped ion thermal motion
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Unique influences of reboiler inventory control on the operation of totally reboiled reactive distillation columns
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作者 Kejin Huang Yang Yuan +3 位作者 Liang Zhang Haisheng Chen Shaofeng Wang Nian Liu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第1期103-115,共13页
In this work,the dynamics and operation of the totally reboiled reactive distillation columns are visualized in terms of transfer function based process models.This kind of processes is found to be characterized by un... In this work,the dynamics and operation of the totally reboiled reactive distillation columns are visualized in terms of transfer function based process models.This kind of processes is found to be characterized by underdamped step responses due to the special topological configuration and the intricate interplay between the reaction operation and the separation operation involved.The under-dampness can be substantially alleviated through the tight inventory control of bottom reboiler and this presents beneficial effects to process dynamics and operation.Two totally reboiled reactive distillation columns,separating,respectively,a hypothetical synthesis reaction from reactants A and B to product C,and a real decomposition reaction from 1,4-butanediol to tetrahydrofuran and water,are employed to demonstrate these uncommon behaviors.The results obtained give full support to the above qualitative interpretation.Despite the strong influences of reaction kinetics and thermodynamic properties of the reacting mixtures,the totally reboiled reactive distillation columns are generally considered to present such unique behaviors and require tight inventory control of bottom reboiler to facilitate their control system development. 展开更多
关键词 Reactive distillation column Totally reboiled operation Reboiler inventory control Process dynamics Process control
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Generation of a genuine six-partite entangled state in trapped-ion system 被引量:1
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作者 DENG HongGui ZHENG XiaoJuan 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2012年第8期1427-1430,共4页
Recently, a genuine six-qubit entangled state Isix) has been proposed [Chen P X, et al. Phys Rev A, 2006, 74: 032324]. This state does not belong to the well-known three types of multipartite entangled states, i.e.,... Recently, a genuine six-qubit entangled state Isix) has been proposed [Chen P X, et al. Phys Rev A, 2006, 74: 032324]. This state does not belong to the well-known three types of multipartite entangled states, i.e., Greenberger-Home-Zeilinger (GHZ) state, W state, and linear cluster state. This state has many potential applications in quantum information processing. We pro- pose a scheme for generating such a genuine six-qubit entangled state for trapped ions in thermal motion. The scheme is insen- sitive to both the initial motional state and heating. 展开更多
关键词 six-qubit:trapped ion six-qubit:entangled state
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