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Stress drop assessment of the August 8, 2017, Jiuzhaigou earthquake sequence and its tectonic implications

Earthquake Science 2020年第4期33卷 161-176页

作者： Xi He Lian-Feng Zhao Xiao-Bi Xie Lin Shen Wei-Min Wang zhen-xing Yao Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics^Chinese Academy of SciencesBeijing 100029China Institute of Geophysics and Planetary Physics University of California at Santa CruzCA 95064USA Key Laboratory of Continental Collision and Plateau Uplift Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China

By using a broadband Lg attenuation model developed for the Tibetan Plateau,we isolate source terms by removing attenuation and site effects from the observed Lg-wave displacement spectra of the M 7.0 earthquake that occurred on August 8,2017,in Jiuzhaigou,China,and its aftershock ***,the source parameters,including the scalar seismic moment,comer frequency and stress drop,of these events can be further *** estimated stress drops vary from 47.1 kPa to 7149.6 kPa,with a median value of 59.4 kPa and most values falling between 50 kPa and 75 *** estimated stress drops show significant spatial *** stress drops were mainly found close to the mainshock and on the seismogenic fault plane with large coseismic *** contrast,the highest stress drop was 7.1 MPa for the mainshock,and relatively large stress drops were also found for aftershocks away from the major seismogenic fault and at depths deeper than the zone with large coseismic *** using a statistical method,we found self-similarity among some of the aftershocks with a nearly constant stress *** contrast,the stress drop increased with the seismic moment for other *** amount of stress released during earthquakes is a fundamental characteristic of the earthquake rupture *** such,the stress drop represents a key parameter for improving our understanding of earthquake source physics.

关键词： scalar seismic moment comer frequency stress drop Lg attenuation Jiuzhaigou earthquake

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Status and Protection of National Wetland Parks in the Tibet Autonomous Region

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Journal of Landscape Research 2019年第1期11卷 73-78,86页

作者： YOU Yuhui HU Jingkuo xing zhen Resources & Environment College Tibet Agriculture & Animal Husbandry University Key Laboratory of Tibetan Forestry Ecological Engineering National Key Station of Field Scientific Observation & Experiment Key Laboratory of Biodiversity Conservation and Vegetation Restoration in Tibet Plateau

This paper summarized the status, the brief history of the construction and development of national wetland parks in the Tibet Autonomous Region, and proposed corresponding measures for their later protection and deve... 详细信息

关键词： Tibet Autonomous Region National wetland parks Status and protection

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Individualized treatment for gastric cancer with rib metastasis: Acase report

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World Journal of Gastrointestinal Surgery 2020年第12期12卷 555-563页

作者： Yu Zhang zhen-xing Zhang Zeng-Xin Lu Fang Liu Geng-Yuan Hu Feng Tao Min-Feng Ye Department of Gastrointestinal Surgery Shaoxing People's Hospital Shaoxing Hospital Zhejiang University School of MedicineShaoxing 312000Zhejiang ProvinceChina Department of Radiology Shaoxing People's HospitalShaoxing HospitalZhejiang University School of MedicineShaoxing 312000Zhejiang ProvinceChina

BACKGROUND Gastric cancer (GC) with bone metastasis is rare, and rib metastasis is even lesscommon. The clinical prognosis of GC with bone metastasis is poor given the lackof an effective *** SUMMARY A 70 year old man was referred to Shaoxing People’s Hospital with left chest painand slight dyspnea. Chest computed tomography (CT) revealed a metastaticlesion in the left 3rd rib. Esophagogastroduodenoscopy revealed several ulcers inthe angle and antrum of the stomach, and tumor biomarkers including CEA andCA-199 were clearly increased. In addition, lymph node metastasis in the lessercurvature of the stomach was identified by positron emission tomography/CTscanning. Further pathological examination confirmed metastatic adenocarcinomain the rib and medium-low differentiated adenocarcinoma in the gastric *** patient had GC with rib metastasis, and was clinically staged as T3NxM1 (IVB).Based on multidisciplinary team opinions, the patient received five courses ofchemotherapy (CAPOX plus aptinib), and then underwent rib resection andlaparoscopic radical distal gastrectomy. The patient started four courses ofchemotherapy after surgery, and then capecitabine and aptinib were administeredorally for 3 mo. Follow-up was performed on an outpatient basis usingabdominal/chest CT and tumor biomarkers. The patient exhibited an overallsurvival greater than 2 years, and the disease-free survival was approximately 18mo. His adverse events were *** The incidence of GC with rib metastases is extremely low, and patients can obtainmore benefits from individualized treatment formulated by multidisciplinaryteam. Chemotherapy plus surgery might represent an alternative option for GCwith rib metastasis.

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Photocatalytic Dissociation of CH3OH on ZnO(0001) Surface

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Chinese Journal of Chemical Physics 2019年第5期32卷 525-530页

作者： Peng-xiao Liang Fei Xu zhen-xing Li Zhi-wen Luan xing-an Wang Qing Guo Xue-ming Yang Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics University of Science and Technology of China Hefei 230026 China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Department of Chemistry School of Science Southern University of Science and Technology Shenzhen 518055 China

Photocatalysis of CH3OH on the ZnO(0001) surface has been investigated by using temperature-programmed desorption (TPD) method with a 266 nm laser light. TPD results show that part of the CH3OH adsorbed on ZnO(0001) surface are in molecular form, while others are dissociated. The thermal reaction products of H2, CH3·, H2O, CO, CH2O, CO2 and CH3OH have been detected. Experiments with the UV laser light indicate that the irradiation can promote the dissociation of CH3OH/CH3O· to form CH2O, which can be fu- ture converted to HCOO- during heating or illumination. The reaction between CH3OHZn and OHad can form the H2O molecule at the Zn site. Both temperature and illumination promote the desorption of CH3· from CH3O·. The research provides a new insight into the photocatalytic reaction mechanism of CH3OH on ZnO(0001).

关键词： Methanol Photocatalysis ZnO(0001) surface Temperature-programmed desorption

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Efficient Expression and Purification of Fc-fragment-binding Domain and Its Application to Immunoglobulin G Purification

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Biomedical and Environmental Sciences 2013年第11期26卷 916-919页

作者： LAO xing zhen ZHOU Ya Li zhenG Heng School of Life Science and Technology China Pharmaceutical University

The number of therapeutic monoclonal antibodies used in clinical trials has recently increased dramatically, leading to the development of optimized downstream purification processes[1]. Staphylococcal protein A （SPA）, a cell-wall protein of Staphylococcus aureus, has been developed as a universal ligand for immunoglobulin G （IgG） purification because it binds specifically to the Fc portion of the IgG molecule of many mammals[2]. However, certain characteristics of SPA severely restrict the advancement of the antibody industry.

关键词： Fc Efficient Expression and Purification of Fc-fragment-binding Domain and Its Application to Immunoglobulin G Purification Figure IgG

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Optimum Design and Global Analysis of Flexible Jumper for An Innovative Subsurface Production System in Ultra-Deep Water

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China Ocean Engineering 2014年第2期28卷 239-247页

作者：黄一甄兴伟张崎王文华 School of Naval Architecture and Ocean Engineering Dalian University of Technology Deepwater Engineering Research Center Dalian University of Technology State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology

The study focuses on the flexible jumper issue of Subsurface Tension Leg Production （STLP） system concept, which is considered as a competing alternative system to support well completion devices and rigid risers in ultra-deep water for offshore petroleum production. The paper presents analytical and numerical approaches for the optimum design and global analysis of the flexible jumper. Criteria using catenary concept are developed to define the critical length for optimum design. Based on the criteria, detailed hydrodynamic analyses including quasi-static analysis, modal analysis, and dynamic analysis are performed. Modal analysis with respect to the quasi-static analysis shows that the existence of resonant modes requires special consideration. The results of dynamic analysis confirm the effectiveness of the de-coupled effect from the jumper on STLP system. The approaches developed in the study also have wide application prospect in reference to the optimum design and analysis of any Hybrid Riser （HR） concept.

关键词： subsurface production system flexible jumper dynamic analysis ultra-deep water

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利用区域地震波形振幅包络约束朝鲜地下核试验的埋深和当量

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地球物理学报 2016年第6期59卷 2066-2079页

作者：林鑫姚振兴华中科技大学地球物理研究所华中科技大学物理学院武汉430074 中国科学院地质与地球物理研究所地球与行星物理重点实验室北京100029

核爆当量和埋藏深度是地下核试验的两个重要参数.根据中国东北地区区域范围内地震台站观测记录,利用Pn,Pg,Sn和Lg波波形,计算水平分量的尾波振幅包络,调查2006年10月9日,2009年5月25日,2013年2月13日和2016年1月6日四次朝鲜地下核试验... 详细信息

核爆当量和埋藏深度是地下核试验的两个重要参数.根据中国东北地区区域范围内地震台站观测记录,利用Pn,Pg,Sn和Lg波波形,计算水平分量的尾波振幅包络,调查2006年10月9日,2009年5月25日,2013年2月13日和2016年1月6日四次朝鲜地下核试验的爆炸当量和埋藏深度.以牡丹江(MDJ)台站记录为例,对两个水平分量波形进行带通滤波,计算平均波形的振幅包络.最终得到区域地震台站水平分量振幅包络,振幅稳定,包络振幅的变化清晰地显示区域震相的位置.区域震相的时间域振幅包络由震源谱函数、传播效应、台基响应和传递函数及尾波形状函数构成.通过网格搜索的方法,拟合水平分量记录的波形包络,可以获得核爆当量和埋藏深度的估计.结果表明,朝鲜四次地下核试验爆炸当量以时间为序从0.6±0.2kt到3.0±1.5kt,增加至10.0±2.0kt,再降到8.0±2.0kt.2006年核爆的埋藏深度较浅,为150±100m,2009年朝鲜核试验的埋藏深度为350±100m,2013年和2016年朝鲜核试验的深度非常一致,均为500±200m.这些结果与前人的调查结果一致性较高,说明使用单一地震台站时间域水平分量尾波振幅包络是可能同时约束地下核试验爆炸当量和埋藏深度的.

关键词：区域震相振幅包络朝鲜核试验爆炸当量埋藏深度

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A Robust Self-healing Polyurethane Elastomer Enabled by Tuning the Molecular Mobility and Phase Morphology through Disulfide Bonds

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Chinese Journal of Polymer Science 2021年第10期39卷 1299-1309,I0007页

作者： Hai-Tao Wu Bi-Qiang Jin Hao Wang Wen-Qiang Wu zhen-xing Cao Zhao-Yang Yuan Yue Huang Wei-Hang Li Guang-Su Huang Lu-Sheng Liao Jin-Rong Wu State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineerngSichuan UniversityChengdu 610065China Guangdong Provincial Key Laboratory of Natural Rubber Processing Agricultural Products Processing Research Institute of Chinese Academy of Tropical Agricultural SciencesZhanjiang 524001China

Elastomers with outstanding strength,toughness and healing efficiency are highly promising for many emerging ***,it is still a challenge to integrate all these beneficial features in one ***,an asymmetric alicyclic structure adjacent to aromatic disulfide was tactfully introduced into the backbone of polyurethane(PU)***,such elastomer(PU-HPS)was fabricated by polycondensing polytetramethylene ether glycol(PTMEG),isophorone diisocyanate(IPDI)and p-hydroxydiphenyl disulfide(HPS)via one-pot *** molecular mobility and phase morphology of PU-HPS can be tuned by adjusting the HPS ***,the dynamic exchange of hydrogen and disulfide bonds in the hard segment domains can also be *** optimized sample manifests outstanding tensile strength(46.4 MPa),high toughness(109.1 MJ/m^(3)),high self-healing efficiency after fracture(90.3%),complete scratch recovery(100%)and good puncture ***,this work provides a facile strategy for developing robust self-healing polymers.

关键词： Self-healing Polyurethane Disulfide bonds Chain mobility Phase morphology

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一种基于0.18-μm CMOS工艺的新型超宽频带毫米波混频器设计与分析

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电子学报 2015年第2期43卷 405-411页

作者：余振兴冯军东南大学射频与光电集成电路研究所江苏南京210096

本文提出了一种超宽频带毫米波混频器电路.混频器采用分布式拓扑结构和中频功率合成技术,具有宽带宽和高转换增益.该混频器采用TSMC 0.18-μm CMOS工艺设计并制造,芯片总面积为1.67mm2.测试结果表明:混频器工作频率从8GHz到40GHz,中频... 详细信息

本文提出了一种超宽频带毫米波混频器电路.混频器采用分布式拓扑结构和中频功率合成技术,具有宽带宽和高转换增益.该混频器采用TSMC 0.18-μm CMOS工艺设计并制造,芯片总面积为1.67mm2.测试结果表明:混频器工作频率从8GHz到40GHz,中频频率为2.5GHz时的转换增益为-0.2d B至4d B,其本振到中频端口和射频到中频端口间的隔离度均大于50d B.整个电路的直流功耗小于32m W.

关键词：分布式混频器宽中频栅注入混频器(GPM) 功率合成毫米波(MMW)

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Globally optimized finite-difference extrapolator for strongly VTI media

Globally optimized finite-difference extrapolator for strong...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Jin-Hai Zhang zhen-xing Yao Chinese Academy of Sciences Institute of Geology and Geophysics

Implicit finite-difference(FD) migration is unconditionally stable and is popular in handling strong velocity variations, but its extension to strongly transversely anisotropic media with vertical symmetric axis media is *** local optimizations generate the optimized coefficients for each pair of Thomsen anisotropy parameters independently,which can degrade results substantially for large anisotropy variations and lead to a huge *** developed an implicit FD method using the analytic Taylor-series expansion and used a global optimization scheme to improve its accuracy for wide phase angles. We first extended the number of the constant coefficients;then we relaxed the coefficient of the time-delay extrapolation term by tuning a small factor such that error is less than 0.1%.Finally, we optimized the constant coefficients using a simulated annealing algorithm by constraining that all the error functions on a fine grid of the whole anisotropic region did not exceed 0.5%*** extended number of the constant coefficients and the relaxed coefficient greatly enhanced the flexibility of matching the dispersion relation and significantly improved the ability of handling strong anisotropy over a much wider *** with traditional local optimization,our scheme does not need any table and table *** each order of the FD method,only one group of optimized coefficients is enough to handle strong variations in velocity and anisotropy. More importantly,our global optimization scheme guarantees the accuracy for various possible ranges of anisotropy parameters, no matter how strong the anisotropy *** the globally optimized second-order FD method,the accurate phase angle is up to 58°,and the increase is about 18°-22°.For the globally optimized fourth-order FD method,the accurate phase angle is up to 77°,and the increase is about 22°-27°.

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