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| 1 | Finite element analysis and optimization of temperature field in GaN-MOCVD reactor显示文摘The electromagnetic field distribution of the in-home GaN-MOCVD reactor heated by induction was simulated by using finite element method (FEM), and the distributions of the magnetic field and the joule heat in the graphite susceptor were obtained. Then the distribution of joule heat was used as the applied load for the simulation of temperature. Based on heat conduction and heat emission models, the temperature distribution in the reactor and the susceptor were gained. In order to improve the uniformity of the temperature on the top surface of the susceptor, the conventional concentric placement of the susceptor in the reactor was changed into the eccentric placement, which effectively improved the temperature uniformity and increased the heat efficiency. | ZHANG JinCheng, LI ZhiMing, HAO Yue , WANG Hao & LI PeiXian Key Laboratory of Fundamental Science for National Defense on Wide Band-Gap Semiconductor Technology, School of Microelectronics, Xidian University, Xi’an 710071, China | 2010 | Science China(Information Sciences)2010，53，10： | 7 |
| 2 | Poor outcomes of immunoglobulin D multiple myeloma patients in the era of novel agents:a single-center experience显示文摘Dear Editor, Multiple myeloma (MM) is a disease characterized by the clonal expansion of malignant plasma cells in the marrow, leading to anemia, hypercalcemia, bone lesion, and renal dysfunction [1]. Immunoglobulin D (IgD) myeloma is a rare subtype of MM, accounting for approximately 1% to 2% of all MM patients [2]. It occurs at a young age, often accom-panied with a high disease burden and short median sur-vival (18-21 months) [3, 4]. Several studies have suggested that in patients with IgD subtype, the outcomes of those who have had undergone autologous stem cell transplanta-tion (ASCT) were superior than those treated with chemo-therapy alone [5, 6]. However, these have been debatable as other reports have displayed opposite results [7, 8]. | Qian Zhao Feng Li Ping Song Xiaogang Zhou Zhiming An Jiangang Mei Jingjing Shao Hanqing Li Xuli Wang Xing Guo Yongping Zhai | 2019 | Cancer Communications2019，39，1： | 3 |
| 3 | Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing显示文摘Complex oxides with tunable structures have many fascinating properties,though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach.Here we have successfully developed solution-based single-crystalline epitaxy for multiferroic(1-x)BiTi(1-y)/2FeyMg(1-y)/2O3–(x)CaTiO3(BTFM–CTO)solid solution in large area,confirming its ferroelectricity at the atomic scale with strong spontaneous polarization.Careful compositional tuning leads to a bulk magnetization of 0.07±0.035μB/Fe at room temperature,enabling magnetically induced polarization switching exhibiting a large magnetoelectric coefficient of 2.7–3.0×10^-7 s/m.This work demonstrates the great potential of solution processing in large-scale complex oxide epitaxy and establishes novel room-temperature magnetoelectric coupling in epitaxial BTFM–CTO film,making it possible to explore a much wider space of composition,phase,and structure that can be easily scaled up for industrial applications. | Cong Liu Feng An Paria S.M.Gharavi Qinwen Lu Junkun Zha Chao Chen Liming Wang Xiaozhi Zhan Zedong Xu Yuan Zhang Ke Qu Junxiang Yao Yun Ou Zhiming Zhao Xiangli Zhong Dongwen Zhang Nagarajan Valanoor Lang Chen Tao Zhu Deyang Chen Xiaofang Zhai Peng Gao Tingting Jia Shuhong Xie Gaokuo Zhong Jiangyu Li | 2020 | National Science Review2020，7，1： | 2 |
| 4 | Random characteristics of the heterogeneous structure in gas-solid fluidization显示文摘 | Heping Cui Jinghai Li Hongzhi An Min Chen Zhiming Ma Guofu Wu | 1998 | Science in China Series B: Chemistry1998，，4： | 1 |
| 5 | The high frequency acoustic radiation from the boundary layer of an axisymmetric body显示文摘The mechanism of acoustic radiation from the boundary layer of an axisymmetric body is analyzed, and its sound pressure spectrum is predicted. It is shown that the acoustic radiation results from the transition region and the turbulent boundary layer; and that the acoustic radiation from transition region is predominant at low frequencies; while the turbulent boundary layer has the decisive effect on acoustic radiation at high frequencies. The calculated values are in good agreement with the experimental data. | LI Fuxin MA Lin (College of Marine Engineering, Northwestern Polytechnical University Xi’an 710072) MA Zhiming (College oj Navy Aeronautics Engineering Qingdao 266001) | 2001 | Chinese Journal of Acoustics2001，20，2： | 1 |
| 6 | Design of readout electronics based on peak-holding circuit and multiplexer for a fast neutron spectrometer显示文摘Background Fast neutron detection is meaningful in many research fields such as space environment monitoring.A scintillating fiber array model for fast neutron detection was proposed and developed in 1980s.Aerospace applications of the model require electronics in small size.Purpose To design a dedicated electronic system to readout and process the 384-channel signals from scintillating fiber array,and to use the designed system to fabricate a neutron detector for aerospace applications.Methods With the method of nuclear recoil,fast neutron is detected by tracking recoil proton of n–p scatter in scintillating plastic fibers.Using the peak-holding circuits and multiplexers,the system size and power consumption were reduced.Results The detector fabricated with the designed system,had 34 cm×34 cm×27 cm mechanical size,20.4 kg weight,and 30.05W power consumption.Comparing to traditional waveform sampling electronics,the designed electronics was highly integrated and had a small size.The readout electronics also gave a better energy resolution of 39%in neutron detection,while the energy resolution was 43%in previous version.Conclusion In this study,a highly integrated readout electronic system was designed and verified.The detector using the system gave good performance.The designed electronics had potential development in fast neutron detection and other high energy physics detection system. | Liyang Sun Kai Zhuang Xiaoming Wang Fanjian Zeng Heng An Daowu Li Yuxiong Xue Zhiming Zhang Wei Zhou Yingjie Wang Baotong Feng Peilin Wang Xiaohui Li Jiale Cai Teng Tong Fanhui Meng Junguang Zhou Huan Huang Xuanhou Hu Xiubo Qin | 2018 | Radiation Detection Technology and Methods2018，2，1： | 1 |
| 7 | Research progress in geophysical exploration of the Antarctic ice sheet显示文摘The Antarctic ice sheet is an important target of Antarctic research.Thickness and structure,including intraice and subice,are closely related to the mass balance of the ice sheet,and play an important role in the study of global sea level and climate change.Subglacial topography is an important basis for studying ice sheet dynamics and ice sheet evolution.This paper briefly reviews the geophysical detection methods and research status of the Antarctic ice sheet:(1)Conventional methods such as ice radar are the main methods for studying the ice sheet today,and passive source seismic methods such as the receiver function method,H/V method and P-wave coda autocorrelation method have good development prospects;(2)the high-resolution(1 km)ice thickness and subglacial topographic database BEDMAP2 established based on various data has greatly improved the ability to detect internal isochronous layers,anisotropic layers,and temperature changes within ice and has advanced research on ice sheet evolution;and(3)ice radar,numerical simulation and core drilling are the main methods to study subglacial lakes and sediments.More than 400 subglacial lakes have been confirmed,and more than 12000 simulation results have been obtained.Research on the Antarctic ice sheet faces enormous challenges and is of great urgency.Aiming at hot issues,such as Antarctic geological evolution,glacial retreat,ice sheet melting and their relationships with global climate change,it is the frontier and trend of future Antarctic ice sheet research to carry out multidisciplinary and multicountry comprehensive geophysical exploration based on the traditional ice radar method combined with passive seismic methods,especially new technologies such as short-period dense array technology,unmanned aerial vehicles and artificial intelligence.This is expected to further promote Antarctic research. | Jinkai An Song Huang Xiangyang Chen Tao Xu Zhiming Bai | 2023 | Earthquake Research Advances2023，3，3： | 0 |
| 8 | THE CITY'S MOUNTAINS AND WATER显示文摘Aselection of excellent photos from the 12th'Love Beijing,Focus on Beijing'public photography event are on display at the Capital Museum.The 2021 event,with its theme of'Beijing:A Happy and Prosperous City'has attracted scores of photography enthusiasts and audiences who are eager to enjoy Beijing's highlights through the medium of photography.Attendees at the museum's exhibit were thilled about what they have seen.'This is Beijing through the lens of ordinary people who love the city'one attendee commented.'These photographs enable us to see the latest,the best and the most beautiful version of Beijing,'said another.He continued,'Because these photos so perfectly reflect the spirit of the city,they could have only been shot by photographers with a real passion for Beijing' | Wang Wei An Xiufang Chen Limin Li Jintao LI Zhiming QI Shiming Tian Jun Zhao Guangming | 2021 | Beijing2021，，25： | 0 |
| 9 | Physical simulation experiment and numerical inversion of the full life cycle of shale gas well显示文摘The ultra-low porosity and permeability,as well as complex occurrence and transport state of shale reservoir make it possess special L-type production characteristic curve and complicated shale gas flow mechanism.To solve the difficulty of collecting complete production data due to short production time and operation discontinuity,a full-diameter core physical simulation experiment on the full lifecycle production process of shale gas well depletion is conducted with the purpose of obtaining many important production data including complete pressure and daily gas output in the simulated production process of shale gas well.The experimental results show the production characteristic from simulation is consistent with those from gas well.Based on the simulation data,the critical desorption pressure(12 MPa)of core,free gas production(3820.8 mL),adsorbed gas production(2151.2 mL),the proportion of the daily gas production between free and absorbed gas under different time and formation pressure,as well as the production time and final recovery rate corresponding to abandoned pressure,can be determined accurately.Numerical inversion is carried out to calculate the production performance curve of shale gas well and predict the development effect of gas well based on well testing and similarity analysis of the dimensionless time between core experiment and gas well production.Finally,the permeability and the fracturing effect(fracture network density)as the keys to the effective development of shale gas reservoirs are proposed.The permeability is the fundamental factor and the fracturing technology is the major means. | Shusheng Gao Huaxun Liu Liyou Ye Zhiming Hu Weiguo An | 2019 | Petroleum Research2019，4，2： | 0 |
| 10 | Green OLED based on double metallic mirrors in microcavity structures and double light-emitting structure显示文摘 | Tao An Junyu Wu Peng Li Sheng Yang Zhiming Ding | 2017 | 光电工程2017，44，3： | 0 |
| 11 | Optical remote imaging via Fourier ptychography显示文摘Combining the synthetic aperture radar(SAR)with the optical phase recovery,Fourier ptychography(FP)can be a promising technique for high-resolution optical remote imaging.However,there are still two issues that need to be addressed.First,the multi-angle coherent model of FP would be destroyed by the diffuse object;whether it can improve the resolution or just suppress the speckle is unclear.Second,the imaging distance is in meter scale and the diameter of field of view(FOV)is around centimeter scale,which greatly limits the application.In this paper,the reasons for the limitation of distance and FOV are analyzed,which mainly lie in the illumination scheme.We report a spherical wave illumination scheme and its algorithm to obtain larger FOV and longer distance.A noise suppression algorithm is reported to improve the reconstruction quality.The theoretical interpretation of our system under random phase is given.It is confirmed that FP can improve the resolution to the theoretical limit of the virtual synthetic aperture rather than simply suppressing the speckle.A 10 m standoff distance experiment with a six-fold synthetic aperture up to 31 mm over an object of size1m×0.7 m is demonstrated. | ZHIMING TIAN MING ZHAO DONG YANG SEN WANG AN PAN | 2023 | Photonics Research2023，11，12： | 0 |
| 12 | N_(2)photofixation promoted by in situ photoinduced dynamic iodine vacancies at step edge in Bi_(5)O_(7)I nanotubes显示文摘Heterogeneous photosynthesis is a promising route for sustainable ammonia production,which can utilize renewable energy and water as the hydrogen source under ambient condition.In this study,a series of Bi_(5)O_(7)I(BOI)nanosheets and nanotubes are synthesized,the surface tensile strain is formed by curling the nanosheets into nanotubes to tune the concentration and location of dynamic vacancies.Scanning transmission electron microscopy(STEM)with spherical aberration correction confirms the presence of intrinsic areal defects on the surface of the BOI nanotube resulted from surface tensile strain.The presence of areal defects lowers the formation energy of I vacancies(IV)at step edge site,thus the IV with higher concentration would be favorably generated under visible light.Rapid scan in situ Fourier transform infrared(FT-IR)analysis in the aqueous media reveals that the IV promotes photocatalytic N_(2) activation and reduction,proceeds through an associative alternating mechanism.Specially,after turning off the light,the surface vacancy sites can be reoccupied by I−ions,which enables the protection and regeneration of photocatalyst surface in an aerobic and dark environment.This work provides an innovative strategy to tune concentration and location of dynamic surface vacancies on photocatalysts by building surface tensile strain for advancing sustainable ammonia production. | Xing’an Dong Kaiwen Wang Zhihao Cui Xian Shi Zhiming Wang Fan Dong | 2023 | Nano Research2023，16，5： | 0 |
| 13 | A Ka-band calibratable phased-array front-end chip with high element-consistency显示文摘Dear editor,Active phased arrays are widely used in radar and communication systems due to their characteristics such as rapid wave beam steering, agile beamforming, and spatial power synthesis. The phased-array system contains a large number of elements. Three critical components in each element are precise amplitude control, precise phase control, and signal amplification. | Shiyan SUN An'an LI Yingtao DING Zipeng CHEN Wei WANG Sijia JIANG Zhiming CHEN Baoyong CHI | 2022 | Science China(Information Sciences)2022，65，12： | 0 |
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