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46篇 您的检索式:作者名="Feng Shiping"
    题名 作者 年代 出处 被引量
1A novel true triaxial test system for microwave-induced fracturing of hard rocks显示文摘This study introduces a test system for microwave-induced fracturing of hard rocks under true triaxial stress.The test system comprises a true triaxial stress loading system,an open-ended microwaveinduced fracturing system,a data acquisition system,an acoustic emission(AE)monitoring system,and an auxiliary specimen loading system.Microwave-induced surface and borehole fracturing tests under true triaxial stress were fulfilled for the first time,which overcomes the problem of microwave leakage in the coupling loading of true triaxial stress and microwave.By developing the dynamic monitoring system,the thermal response and fracture evolution were obtained during microwave irradiation.The monitoring system includes the infrared thermometry technique for monitoring rock surface temperature,the distributed optic fiber sensing technique for monitoring temperature in borehole in rock,the AE technique and two-dimensional digital speckle correlation technique for monitoring the evolution of thermal damage and the rock fracturing process.To validate the advantages of the test system and investigate the characteristics of microwave-induced fracturing of hard rocks,the study demonstrates the experimental methods and results for microwave-induced surface and borehole fracturing under true triaxial stress.The results show that thermal cracking presented intermittent characteristics(calm eactiveecalm)during microwave-induced surface and borehole fracturing of basalt.In addition,true triaxial stress can inhibit the development and distribution of thermal cracks during microwave-induced surface fracturing.When microwave-induced borehole fracturing occurs,it promotes the distribution of thermal cracks in rock,but inhibits the width of cracks.The results also prove the reliability of the test system.Xia-Ting Feng Jiuyu Zhang Chengxiang Yang Jun Tian Feng Lin Shiping Li Xiangxin Su 2021Journal of Rock Mechanics and Geotechnical Engineering2021,13,5:5
2printed electrode immunosensors for Schistosoma japonicum显示文摘ZENG Shaohua TIAN Zhi CHE Hongli YANG Huihui CHEN Xiuchun FENG Qimei ZHOU Yunfei ZHANG Shuju WU Zhaoyang WANG Shiping 2012中南大学学报(医学版)2012,37,6:3
3Complex Helmholtz Coils for Producing Uniform Magnetic Fields显示文摘In imaging experiments in ion-atom collisions, due to its small mass, the electron is easy to escape from the extraction electrostatic field, and this makes the complete collection difficult. In order to improve the solid angle for imaging of electrons, a uniform magnetic field is needed to restrict the electron trajectories .Usually, a pair of same coils, called Helmholtz coils, is employed to produce magnetic field. InFeng Wentian, Ma Xinwen, Liu Huiping, Chen Lanfang, Li Bin and Cao Shiping 2005近代物理研究所和兰州重离子加速器实验室年报:英文版2005,,1:3
4Revealing the surface electronic structures of AIGaN deep-ultraviolet multiple quantum wells with lateral polarity domains显示文摘We report on the carrier dynamic and electronic structure investigations on AlGaN-based deep-ultraviolet multiple quantum wells (MQWs)with lateral polarity domains.The localized potential maximum is predicted near the domain boundaries by first-principle calculation,suggesting carrier localization and efficient radiative recombination.More importantly,lateral band diagrams of the MQWs are proposed based on electron affinities and valance band levels calculated from ultraviolet(UV)photoelectron spectroscopy.The proposed lateral band diagram is further demonstrated by surface potential distribution collected by Kelvin probe microscopy and the density-of-state calculation of energy bands.This work illustrates that lateral polarity structures are playing essential roles in the electronic properties of II nitride photonic devices and may provide novel perspective in the realization of high-efficiency UV emitters.WEI GUO LI CHEN HOUQIANG XU YINGDA QIAN MOHEB SHEIKHI JASON HOO SHIPING GUO LIANG XU JIANZHE LU FERAS ALQATARI XIAOHANG LI KAIYAN HE ZHE CHUAN FENG JICHUN YE 2020Photonics Research2020,8,6:2
5Natural variations of ZmSRO1d modulate the trade-off between drought resistance and yield by affecting ZmRBOHC-mediated stomatal ROS production in maize显示文摘While crop yields have historically increased,drought resistance has become a major concern in the context of global climate change.The trade-off between crop yield and drought resistance is a common phenomenon;however,the underlying molecular modulators remain undetermined.Through genome-wide association study,we revealed that three non-synonymous variants in a drought-resistant allele of ZmSRO1d-R resulted in plasma membrane localization and enhanced mono-ADP-ribosyltransferase activity of ZmSRO1d toward ZmRBOHC,which increased reactive oxygen species(ROS)levels in guard cells and promoted stomatal closure.ZmSRO1d-R enhanced plant drought resilience and protected grain yields under drought conditions,but it led to yield drag under favorable conditions.In contrast,loss-of-function mutants of ZmRBOHC showed remarkably increased yields under well-watered conditions,whereas they showed compromised drought resistance.Interestingly,by analyzing 189 teosinte accessions,we found that the ZmSRO1d-R allele was present in teosinte but was selected against during maize domestication and modern breeding.Collectively,our work suggests that the allele frequency reduction of ZmSRO1d-R in breeding programs may have compromised maize drought resistance while increased yields.Therefore,introduction of the ZmSRO1d-R allele into modern maize cultivars would contribute to food security under drought stress caused by global climate change.Huajian Gao Junjun Cui Shengxue Liu Shuhui Wang Yongyan Lian Yunting Bai Tengfei Zhu Haohao Wu Yijie Wang Shiping Yang Xuefeng Li Junhong Zhuang Limei Chen Zhizhong Gong Feng Qin 2022Molecular Plant2022,15,10:2
6Investigation of ion-atom collision dynamics through imaging techniques显示文摘The principle and technique details of recoil ion momentum imaging are discussed and summarized. The recoil ion momentum spectroscopy built at the Institute of Modern Physics (Lanzhou) is presented. The first results obtained at the setup are analyzed. For 30 keV He2+ on He collision, it is found that the capture of single electron occurs dominantly into the first excited states, and the related scattering angle results show that the ground state capture occurs at large impact parameters, while the capture into excited states occurs at small impact parameters. The results manifest the collision dynamics for the sub-femto-second process can be studied through the techniques uniquely. Finally, the future possibilities of applications of the recoil ion momentum spectroscopy in other fields are outlined.MA XinWen ZHU XiaoLong LIU HuiPing LI Bin ZHANG ShaoFeng CAO ShiPing FENG WenTian XU ShenYue 2008Science China(Physics,Mechanics & Astronomy)2008,51,7:2
7EXISTENCE OF PERIODIC SOLUTIONS TO A p-LAPLACIAN NEUTRAL FUNCTIONAL DIFFERENTIAL EQUATION WITH VARIABLE PARAMETER显示文摘By the generalized Borsuk theorem in coincidence degree theory, a p-Laplacian neutral functional differential equation is studied. A new result on the existence of periodic solution is obtained. The interest is that some coeffcient in it is not a constant function and its sign can be changeable, which is different from that in the known literatures.Feng Liang, Shiping Lu Dept. of Math., Anhui Normal University, Wuhu 241000, Anhui 2010Annals of Differential Equations2010,26,2:2
8A high-Tc dc-SQUID-based single-channel MCG and its performance显示文摘A single-channel high-Tc dc-SQUID magnetometer and gradiometer have been developed to record the magnetic field component perpendicular to the human chest generated by heart-beat. Magnetocardiogram (MCG) measurements have been carried out inside a magnetically shielded room. By sequentially adjusting a non-magnetic patient table with 5 cm pitch in X and Y directions, the field signals on a rectangle grid 5×5 over the chest area were registered in real time trace point by point with a typical dwell time over 30 cardiocycles each. Utilizing standard electrocardiogram (ECG) recordings as timing reference measured simultaneously with the MCG signals, the MCG data were then averaged and combined to form magnetic field patterns every 10 ms or so. Both the current dipole, which is parallel to MCG measuring plane and produces the vertical magnetic field, and its depth were determined as a function of time in a standard way. We have compared the MCG of healthy hearts with that of a heart with right bundleWANG Huiwu DING Hongsheng ZHANG Lihua HUANG Xuguang CHEN Weichang WANG Ziqiang FENG Ji LIU Yiping ZHAO Shiping REN Yufeng YU Hongwei XU Fengzhi WANG Xiaoyin CHEN Genghua YANG Qiansheng 2002Chinese Science Bulletin2002,47,22:2
9Two gaps with one energy scale in cuprate superconductors显示文摘Shiping Feng Huaisong Zhao Zheyu Huang 2012Physical Review B2012,85,05:1
10Interplay between superconductivity and pseudogap state in bilayer cuprate superconductors显示文摘Yu Lan Jihong Qin Shiping Feng 2013Physics Letters A2013,377,3436:1
11Doping dependence of antiferromagnetism in La2CuO4: a numerical study based on a resonating-valence-bond state显示文摘 Feng Shiping 1998Phys Rev1998,38,11:1
12Non-biotouling materials prepared by atom transfer radical polymerization grafting of 2- methacryloloxyethyl phosphorylcholine:Separate eftcts of graft density and chain length on protein repulsion 显示文摘Wei Feng John L Brash Shiping Zhu 2006Biomaterials2006,27,:1
13Spin-liquid state for two-dimensional Heisenberg antiferromagnets on a Kagomé lattice显示文摘 Feng Shiping 2000Eur Phys J2000,13,:1
14Prognosis of gestational choriocarcinoma diagnosed incidentally during laparoscopy for a presumed cornual pregnancy:a report of five cases显示文摘The clinical presentations of gestational choriocarcinoma vary markedly, and a misdiagnosis could be made in atypical patients if simply relying on clinical features. Laparoscopic resection of uterine mass lesion is rarely used in gestational choriocarcinoma diagnosis because of the fear of heavy blood loss and distant metastasis. Five patients who were preoperatively diagnosed as having cornual pregnancy underwent laparoscopic resection of mass lesion and then proved to have gestational choriocarcinoma based on pathological examinations. Chemotherapy was started within two days after surgery, and the rate of complete remission was 100%. The mean follow-up time was 29.8±19.1 months, and no patient showed signs of relapse. Laparoscopic resection of uterine mass followed by timely postoperative chemotherapy may be an effective and safe way to obtain pathologic results in patients with suspected gestational choriocarcinoma.Shiping Liu Chenchen Fan Fengzhi Feng Yang Xiang Xirun Wan Tong Ren 2017Cancer Biology & Medicine2017,14,2:1
15New results of periodic so- lutions for Rayleigh type p-Laplacian equation with a variable coeffi- cient ahead of the nonlinear term 显示文摘LIANG Feng GUO Lixiang LU Shiping 2009Nonlinear Analysis:Theory Methods & Applications2009,70,:1
16Study on dislocation multiplication in the head of Germanium single crystal显示文摘The high strength, radiation hardness and cost-effectiveness make Germanium the substrate of choice for high-efficiency multi-junction solar cells for space applications. Numerical modeling and large-scale simulation are important and indispensable tools in the analysis and development of crystal growth process. In this study, germanium single crystals with low dislocation density were produced by Czochralski method by applying the necking technique. Chemical etching pits method was used to measure the dislocation density, and a professional modeling software CrysVUn was used to obtain the thermal-stress distribution. The results show that the thermal-stress of the sample with diameter of 15 mm is nearly equal to that of other samples, so the thermal-stress does not influence the dislocation multiplication. Based on the result, the dislocation density must be strangely increased caused by gravity.LI Nan FENG Deshen YIN Shiping SU Xiaoping YANG Hai YU Yunqi MI Jianjun 2006Rare Metals2006,25,z2:1
17Anomalous c-axis charge dynamics in copper oxide materials显示文摘Feng Shiping Yuan Feng Yu Weiqiang 1999Phys Rev1999,60,:1
18Fermion-spin transformation to implement the charge-spin separation显示文摘Feng Shiping Su Z B Yu L 1994Phys Rev B1994,49,:1
19Pseudogap effects on the c-axis charge dynamics in copper oxide materials显示文摘Feng Shiping Yuan Feng Yu Weiqiang 2000Eur Phys J B2000,15,:1
20A facile method of forming nanoscale patterns on poly(ethylene glycol)-based surfaces by self-assembly of randomly grafted block copolymer brushes显示文摘Gao Xiang Feng Wei Zhu Shiping 2008Langmuir2008,24,15:1
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