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9篇 您的检索式:作者名="SUN Hongchuan"
    题名 作者 年代 出处 被引量
1基于波射线路径偏移压制多次波显示文摘波射线路径压制多次波的反射波成像是在偏移过程去除多次波同时仅对反射波成像 .通过在共炮道集和共检波点道集分别计算炮点射线的入射角和检波点射线的出射角计算射线的路径 .从炮点入射的射线与从检波点出射的射线的交点形成的走时 ,若等于观测走时 ,可以判断此条射线是反射波 ;反之 ,若不相等 ,则是多次波 .数值实验表明此方法可以有效地去掉由于多次波能量产生的假成像点和压制多次波 ,因此界面可以正确归位 。刘伊克 Hongchuan Sun 常旭 2004地球物理学报2004,47,4:34
2波路径偏移压制层间多次波的理论与应用显示文摘消除层间多次波是地震勘探资料处理研究领域的难题,尤其对于实际资料的处理,到目前为止还很难找到一种完全有效的方法.本文给出了仅对一次波成像既波路径偏移方法压制层间多次波方法,在共炮道集和共检波点道集分别计算炮点射线的入射角和检波点射线的出射角,由此计算的角度作为射线追踪的初始角度,计算地震波射线的传播路径.结合由程函方程计算的走时表,判断偏移范围是反射波还是多次波.在前期偏移过程压制多次波的理论研究基础上,本文主要研究波路径偏移消除多次波的应用部分.为了进一步说明效果的有效性,计算了在单炮和共成像点道集压制层间多次波,给出了实际资料的压制多次波的偏移结果.刘伊克 常旭 王辉 卢孟夏 Hongchuan Sun 2008地球物理学报2008,51,2:25
3目标函数叠前保幅偏移方法与应用显示文摘将理论反射率与偏移反射率的差作为目标函数,给出一种迭代振幅补偿保幅偏移方法.把偏移看作一个反问题,寻找反问题中的最优解.偏移算子是正演算子的伴随共轭,其伴随矩阵非对角占优.通过预条件优化伴随矩阵,使Hessian矩阵准对角化.依据地震波传播稳定相位理论,计算反射点,以反射点为中心、菲涅耳带为半径偏移.考虑振幅几何扩散补偿、散射角度补偿,在迭代反演过程求出最优解,即保幅偏移解.本文给出了一个保幅数值模拟结果和一个实际地震数据实例.刘伊克 常旭 卢孟夏 Hongchuan Sun 2006地球物理学报2006,49,4:22
4The El Ni?o-Southern Oscillation cycle simulated by the climate system model of Chinese Academy of Sciences显示文摘On the basis of more than 200-year control run, the performance of the climate system model of Chinese Academy of Sciences(CAS-ESM-C) in simulating the El Ni?o-Southern Oscillation(ENSO) cycle is evaluated, including the onset, development and decay of the ENSO. It is shown that, the model can reasonably simulate the annual cycle and interannual variability of sea surface temperature(SST) in the tropical Pacific, as well as the seasonal phase-locking of the ENSO. The model also captures two prerequisites for the El Ni?o onset, i.e., a westerly anomaly and a warm SST anomaly in the equatorial western Pacific. Owing to too strong forcing from an extratropical meridional wind, however, the westerly anomaly in this region is largely overestimated. Moreover, the simulated thermocline is much shallower with a weaker slope. As a result, the warm SST anomaly from the western Pacific propagates eastward more quickly, leading to a faster development of an El Ni?o. During the decay stage, owing to a stronger El Ni?o in the model, the secondary Gill-type response of the tropical atmosphere to the eastern Pacific warming is much stronger, thereby resulting in a persistent easterly anomaly in the western Pacific. Meanwhile, a cold anomaly in the warm pool appears as a result of a lifted thermocline via Ekman pumping. Finally, an El Ni?o decays into a La Ni?a through their interactions. In addition, the shorter period and larger amplitude of the ENSO in the model can be attributed to a shallower thermocline in the equatorial Pacific, which speeds up the zonal redistribution of a heat content in the upper ocean.SU Tonghua XUE Feng SUN Hongchuan ZHOU Guangqing 2015Acta Oceanologica Sinica2015,34,1:6
5中国人口生育意愿变迁:1980-2011(英文)显示文摘本文基于1980—2011年间开展的227项关于中国人生育意愿的调查结果,运用横断历史元分析方法,考察了生育意愿的纵向变化趋势。研究发现:1980年以来中国人理想子女数呈减少趋势。2000年之后平均理想子女数基本稳定在1.6—1.8人之间。1980年代中国人生育水平高于生育意愿。随着经济和教育发展水平的提升,二者均呈下降趋势,但是生育水平下降快于生育意愿。1990年之后生育水平低于生育意愿,即人们实际生育子女数少于理想子女数。这为认识生育意愿和生育水平在中国的变化趋势提供了实证依据。侯佳伟 Huang Silin Xin Ziqiang Sun Ling Zhang Hongchuan Dou Donghui Zhao Yuanyuan 2015Social Sciences in China2015,36,1:5
6A phase 3,double-blind,randomized placebo-controlled efficacy and safety study of abiraterone acetate in chemotherapynaı¨ve patients with mCRPC in China,Malaysia,Thailand and Russia显示文摘Objective:This double-blind,placebo-controlled phase 3 study was designed to compare efficacy and safety of abiraterone acetate+prednisone(abiraterone)to prednisone alone in chemotherapy-naı¨ve,asymptomatic or mildly symptomatic metastatic castrationresistant prostate cancer(mCRPC)patients from China,Malaysia,Thailand and Russia.Methods:Adult chemotherapy-naı¨ve patients with confirmed prostate adenocarcinoma,Eastern Cooperative Oncology Group(ECOG)performance status(PS)grade 0e1,ongoing androgen deprivation(serum testosterone<50 ng/dL)with prostate specific antigen(PSA)or radiographic progression were randomized to receive abiraterone acetate(1000 mg,QD)t prednisone(5 mg,BID)or placebo t prednisone(5 mg,BID),until disease progression,unacceptable toxicity or consent withdrawal.Primary endpoint was improvements in time to PSA progression(TTPP).Results:Totally,313 patients were randomized(abiraterone:n Z 157;prednisone:n Z 156);and baseline characteristics were balanced.At clinical cut-off(median follow-up time:3.9 months),80% patients received treatment(abiraterone:n Z 138,prednisone:n Z 112).Median time to PSA progression was not reached with abiraterone versus 3.8 months for prednisone,attaining 58%reduction in PSA progression risk(HR=0.418;p<0.0001).Abirateronetreated patients had higher confirmed PSA response rate(50%vs.21%;relative odds=2.4;p<0.0001)and were 5 times more likely to achieve radiographic response than prednisonetreated patients(22.9%vs.4.8%,p=0.0369).Median survival was not reached.Most common(≥10% abiraterone vs.prednisone-treated)adverse events:bone pain(7%vs.14%),pain in extremity(6%vs.12%),arthralgia(10%vs.8%),back pain(7%vs.11%),and hypertension(15%vs.14%).Conclusion:Interim analysis confirmed favorable benefit-to-risk ratio of abiraterone in chemotherapy-naı¨ve men with mCRPC,consistent with global study,thus supporting use of abiraterone in this patient population.Dingwei Ye Yiran Huang Fangjian Zhou Keji Xie Vsevolod Matveev Changling Li Boris Alexeev Ye Tian Mingxing Qiu Hanzhong Li Tie Zhou Peter De Porre Margaret Yu Vahid Naini Hongchuan Liang Zhuli Wu Yinghao Sun 2017Asian Journal of Urology2017,4,2:3
7Fast velocity analysis by wavepath mi-gration:A 2-D field data example显示文摘Sun Hongchuan 2001Expanded Ab-stracts of 71st Annual Internat SEG Mtg2001,,:1
8Effects of micro-oxygenation on the aroma of Cabernet Sauvignon wine from Ningxia,China显示文摘Micro-oxygenation (MOX) is an effective post-harvest technique for the flavor improvement of grape wine. This study investigated the effect of MOX on the aroma quality of Ningxia wine for the first time. Three sub-region Cabernet Sauvignon dry red wines were treated with different levels of oxygen before or after malolactic fermentation. The wine aroma was analyzed through gas chromatography-mass spectrometry (GC-MS) and quantitative descriptive analysis (QDA) after six months of aging. The data obtained demonstrated that the dose and timing of oxygen addition were key factors influencing the effectiveness of MOX. The most noticeable modifications in wine aroma compounds were generated by an oxygen dosage of 30 (mL/L)/month added before malolactic fermentation. Predominantly, the concentrations of 2-phenylethanol, benzaldehyde, diacetyl, and 2,3-pentanedione showed an increased pattern upon MOX treatments. The sensory analysis revealed that MOX improved the aroma quality of wine by decreasing green and animal odors, meanwhile enhancing the olfactory intensities of dried fruits, flowers, and nuts. This work confirmed that MOX was suitable for aroma modification of Cabernet Sauvignon dry red wine from Ningxia and established a preliminary MOX procedure that can serve as a reference for future applications.Zhong Zhang Qingchen Zhang Huiqing Wang Hongchuan Xia Lijun Sun Junxiang Zhang 2022International Journal of Agricultural and Biological Engineering2022,15,4:1
9Ultrastable bimetallic Fe_(2)Mo for efficient oxygen reduction reaction in pH-universal applications显示文摘Iron-based nanostructures represent an emerging class of catalysts with high electroactivity for oxygen reduction reaction(ORR)in energy storage and conversion technologies.However,current practical applications have been limited by insufficient durability in both alkaline and acidic environments.In particular,limited attention has been paid to stabilizing iron-based catalysts by introducing additional metal by the alloying effect.Herein,we report bimetallic Fe_(2)Mo nanoparticles on N-doped carbon(Fe_(2)Mo/NC)as an efficient and ultra-stable ORR electrocatalyst for the first time.The Fe_(2)Mo/NC catalyst shows high selectivity for a four-electron pathway of ORR and remarkable electrocatalytic activity with high kinetics current density and half-wave potential as well as low Tafel slope in both acidic and alkaline medias.It demonstrates excellent long-term durability with no activity loss even after 10,000 potential cycles.Density functional theory(DFT)calculations have confirmed the modulated electronic structure of formed Fe_(2)Mo,which supports the electron-rich structure for the ORR process.Meanwhile,the mutual protection between Fe and Mo sites guarantees efficient electron transfer and long-term stability,especially under the alkaline environment.This work has supplied an effective strategy to solve the dilemma between high electroactivity and long-term durability for the Fe-based electrocatalysts,which opens a new direction of developing novel electrocatalyst systems for future research.Jue Hu Chengxu Zhang Mingzi Sun Qianglong Qi Shanxiong Luo Hongchuan Song Jingyi Xiao Bolong Huang Michael K.H.Leung Yingjie Zhang 2022Nano Research2022,15,6:1
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