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| 1 | Potential of geosynchronous SAR interferometric measurements in estimating three-dimensional surface displacements显示文摘The ability of differential interferometric synthetic aperture radar(DIn SAR) technology used for centimeter level deformation detection has been well-proved. Nevertheless, the applications of DIn SAR under the low Earth orbit(LEO) are limited to the line-of-sight(LOS) measurements, the limited observation area and the long revisited time. Geosynchronous SAR(GEO SAR), which runs in the height of 36000 km with the advantage of a short revisit time and a large observation area, is a potential approach to overcome the series problems in LEO SAR. This paper focuses on estimating three-dimensional(3D) displacements by using GEO SAR DIn SAR measurements acquired from multiple imaging geometries. Aiming to provide a normal solution for geologic hazard monitoring and relative geophysical application in the future, the errors induced by decorrelation noise, orbital ramp and ionospheric distortion are analyzed for the GEO SAR DIn SAR measurements. A series of experiments have been conducted to find the relationship between the 3D displacements and the DIn SAR observations which are provided with different noises and combinations of imaging geometries. The results reveal that 3D displacements can be expected from the combination of left-and right-looking GEO SAR DIn SAR measurements. In particular, the north-south solution can achieve centimeter and even millimeter level. | Wanji ZHENG Jun HU Wei ZHANG Changjiang YANG Zhiwei LI Jianjun ZHU | 2017 | Science China(Information Sciences)2017，60，6： | 2 |
| 2 | Mapping three-dimensional co-seismic surface deformations associated with the 2015 MW7.2 Murghab earthquake based on InSAR and characteristics of crustal strain显示文摘Three-dimensional(3 D) co-seismic surface deformations are of great importance to interpret the characteristics of coseismic deformations and to understand the geometries and dynamics of seismogenic faults. In this paper, we propose a method for mapping 3 D co-seismic deformations based on InSAR observations and crustal strain characteristics. In addition, the search strategy of correlation points is optimized by adaptive correlation distance, which greatly improves the applicability of the proposed method in restoring deformations in decorrelation areas. Results of the simulation experiment reveal that the proposed method is superior to conventional methods in both the accuracy and completeness. The proposed method is then applied to map the 3 D co-seismic surface deformations associated with the 2015 MW7.2 Murghab earthquake using ascending and descending ALOS-2 PALSAR-2 images. The results show that the seismogenic fault is the Sarez-Karakul fault(SKF), which is dominated by NE-SW strike slips with an almost vertical dip angle. The north section and the south segment near the epicentre have obvious subsidence along with a southwestward motion in the northwest wall, and the southeast wall has northeast movement and surface uplift trend along the fault zone. The strain field of the earthquake is also obtained by the proposed method. It is found that the crustal block of the seismic area is obviously affected by dilatation and shear forces, which is in good agreement with the movement character of the sinistral slip. | Jie GAN Jun HU Zhiwei LI Changjiang YANG Jihong LIU Qian SUN Wanji ZHENG | 2018 | Science China Earth Sciences2018，61，10： | 2 |
| 3 | Study on the viscoelastic behavior of SEEPS block copolymer based on a modified BSW model显示文摘Studies on the viscoelastic behavior of styrene- [ethylene-(ethylene-propylene)]-styrene block copolymer (SEEPS) were carried out, and some characteristic viscoelas-tic parameters were calculated. The longest relaxation time τmax was obtained through simulating the relaxation spec-trum on the basis of a modified Baumgaertel-Schausberger- Winter (mBSW) model. The results revealed that there exists a “second plateau” in the low frequency region of the master curves. The reason for this phenomenon is attributed to the entanglement of macromolecular chains. It is suggested that the hard blocks, polystyrene, act as entanglement points, resulting in a topology restraint to the movement of macro-molecular chains. Meanwhile, it is found that the horizontal shift factors (aT) vs temperature in the master curve could be fitted to the Williams-Landel-Ferry (WLF) equation and Ar-rhenius equation respectively and the flow activation energy (Ea) is 127.88 kJ/mol. In addition, the plateau modulus (GN0) and entanglement molecule weight (Me) were calculated. | WANG Wanjie ZHENG Qiang YU Qiuming | 2005 | Chinese Science Bulletin2005，50，19： | 2 |
| 4 | Studies on structure and phase behavior of multicomponent polymers through rheological test显示文摘 | Zuo Min Zheng Qiang Wang Wanjie | 2007 | Chin J Polym Sci2007，25，： | 1 |
| 5 | Geometrically nonlinear generalized hybrid element and refined element method for non-conforming modes显示文摘 | Zheng Shijie Chen Wanji | 1995 | Acta Mechanica Sinica1995，11，2： | 1 |
| 6 | The formulation of a refined hybrid enhanced assumed strain solid shell element and its application to model smart structures containing distributed piezoelectric sensors/actuators显示文摘 | ZHENG Shijie WANG Xinwei CHEN Wanji | 2003 | Smart Materials and Structures2003，13，4： | 1 |
| 7 | 显示文摘 | Wang Wanjie Zheng Qiang | 2005 | Journal of Materials Science2005，40，20： | 1 |
| 8 | Smartcontext:acontextontologyforpervasivemobilecomputing显示文摘 | MOOREP HUBin WANJizheng | 2010 | TheComputerJournal2010，53，2： | 1 |
| 9 | The Formulation of Refined Hybrid (EAS Solid - Shell Element and Its Application to Model Smart Structures Containing Distributed Piezoelectric Sensors/Actuators显示文摘 | Zheng Shijie Wang Xinwei Chen Wanji | 2004 | Smart Materials and Structures2004，13，4： | 1 |
| 10 | Dischargecharacteristics of cohesive fine coal from aerated hopper显示文摘 | Huang Wanjie Gong Xin Guo Xiaolei Dai Zhenghua Liu Haifeng Zheng Lijiao Xiong Yanjun | 2009 | Powder Technology2009，194，12： | 1 |
| 11 | Desirable molecule discovery via generative latent space exploration显示文摘Drug molecule design is a classic research topic.Drug experts traditionally design molecules relying on their experience.Manual drug design is time-consuming and may produce low-efficacy and offtarget molecules.With the popularity of deep learning,drug experts are beginning to use generative models to design drug molecules.A well-trained generative model can learn the distribution of training samples and infinitely generate drug-like molecules similar to the training samples.The automatic process improves design efficiency.However,most existing methods focus on proposing and optimizing generative models.How to discover ideal molecules from massive candidates is still an unresolved challenge.We propose a visualization system to discover ideal drug molecules generated by generative models.In this paper,we investigated the requirements and issues of drug design experts when using generative models,i.e.,generating molecular structures with specific constraints and finding other molecular structures similar to potential drug molecular structures.We formalized the first problem as an optimization problem and proposed using a genetic algorithm to solve it.For the second problem,we proposed using a neighborhood sampling algorithm based on the continuity of the latent space to find solutions.We integrated the proposed algorithms into a visualization tool,and a case study for discovering potential drug molecules to make KOR agonists and experiments demonstrated the utility of our approach. | Wanjie Zheng Jie Li Yang Zhang | 2023 | Visual Informatics2023，7，4： | 0 |
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