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| 1 | Regional eco-efficiency evaluation and spatial pattern analysis of the Yangtze River Economic Zone显示文摘The environmental ecology of the Yangtze River Economic Zone(YREZ)faces ecological function decline,deterioration and degradation under intense human activities,long-term development and utilization and its economy has developed rapidly over recent decades.Eco-efficiency is considered as a measure of coordinated development of economy,resources,environment and ecology,and is currently considered a very important issue.In this paper,based on the slack-based measure and data envelope analysis model,we take 129 prefecture-level cities of the YREZ as the study unit and measure the eco-efficiency of the YREZ in 2000,2005,2010 and 2015,which considers undesired output.The evaluation of the status quo of the regional eco-efficiency development was carried out at provincial,prefectural and city scales.The spatial autocorrelation test model and standard deviation ellipse were used to analyze the spatially distributed characteristics and the evolutionary regularity of eco-efficiency.Our study suggested that the eco-efficiency value varied significantly at different spatiotemporal scales and the overall distribution presented an'N-shaped'pattern,the value is the largest downstream and the smallest upstream.Regional eco-efficiency presented certain volatility in growth and a clear spatial positive agglomeration trend from 2000 to 2015.The spatial distribution of each agglomeration area was also significantly different,forming some high-high agglomeration areas at the center of the shaft with Shanghai and surrounding cities,and some low-low agglomeration areas at the center with middle reaches and upstream cities.The low-high over-aggregation and high-low polarization clusters were fewer.At the same time,with the change of the research period,the degree of positive agglomeration became increasingly pronounced and the eco-efficiency gap of the neighborhoodunit reduced.The regional eco-efficiency value of the YREZ presented a spatial distribution pattern in the northeast-southwest axis and the evolutionary pattern of the regional eco-efficiency similarly showed a northeast-southwest orientation. | HA Lin TU Jianjun YANG Jianping XU Chunhai PANG Jiaxing LU Debin YAO Zuolin ZHAO Wenyu | 2020 | Journal of Geographical Sciences2020，30，7： | 8 |
| 2 | Crosstalk-free achromatic full Stokes imaging polarimetry metasurface enabled by polarization-dependent phase optimization显示文摘Imaging polarimetry is one of the most widely used analytical technologies for object detection and analysis.To date,most metasurface-based polarimetry techniques are severely limited by narrow operating bandwidths and inevitable crosstalk,leading to detrimental effects on imaging quality and measurement accuracy.Here,we propose a crosstalkfree broadband achromatic full Stokes imaging polarimeter consisting of polarization-sensitive dielectric metalenses,implemented by the principle of polarization-dependent phase optimization.Compared with the single-polarization optimization method,the average crosstalk has been reduced over three times under incident light with arbitrary polarization ranging from 9μm to 12μm,which guarantees the measurement of the polarization state more precisely.The experimental results indicate that the designed polarization-sensitive metalenses can effectively eliminate the chromatic aberration with polarization selectivity and negligible crosstalk.The measured average relative errors are 7.08%,8.62%,7.15%,and 7.59%at 9.3,9.6,10.3,and 10.6μm,respectively.Simultaneously,the broadband full polarization imaging capability of the device is also verified.This work is expected to have potential applications in wavefront detection,remote sensing,light-field imaging,and so forth. | Yaxin Zhang Mingbo Pu Jinjin Jin Xinjian Lu Yinghui Guo Jixiang Cai Fei Zhang Yingli Ha Qiong He Mingfeng Xu Xiong Li Xiaoliang Ma Xiangang Luo | 2022 | Opto-Electronic Advances2022，5，11： | 6 |
| 3 | Development of a coupled supersonic inlet-fan Navier–Stokes simulation method显示文摘A coupled supersonic inlet-fan Navier–Stokes simulation method was developed by using COMSOL-CFD code. The flow turning, pressure rise and loss effects across blade rows of the fan and the inlet-fan interactions were taken into account as source terms of the governing equations without a blade geometry by a body force model. In this model, viscous effects in blade passages can also be calculated directly, which include the exchange of momentum between fluids and detailed viscous flow close to walls. NASA Rotor 37 compressor test rig was used to validate the ability of the body force model to estimate the real performance of blade rows. Calculated pressure ratio characteristics and the distribution of the total pressure, total temperature, and swirl angle in the span direction agreed well with experimental and numerical data. It is shown that the body force model is a promising approach for predicting the flow field of the turbomachinery. Then, coupled axisymmetric mixed compression supersonic inlet-fan simulations were conducted at Mach number 2.8 operating conditions. The analysis includes coupled steady-state performance, and effects of the fan on the inlet. The results indicate that the coupled simulation method is capable of simulating behavior of the supersonic inlet-fan system. | Qiushi LI Yongzhao LYU Tianyu PAN Da LI Ha'nan LU Yifang GONG | 2018 | Chinese Journal of Aeronautics2018，31，2： | 5 |
| 4 | Spatiotemporal patterns and influencing factors of human migration networks in China during COVID-19显示文摘The social lockdowns and strict control measures initiated to combat the COVID-19 pandemic have had an impact on human migration.In this study,big data was used to analyze spatial patterns of population migration in 369 Chinese cities during the COVID-19 outbreak and to identify determinants of population migration.We found that the overall migration intensity decreased by 39.87%compared to the same period in 2019 prior to the COVID-19 outbreak.COVID-19 severely affected human migration.The public holidays and weekends have impacted human migration from the perspective of time scale.The spatial pattern of China’s population distribution presents a diamond structure that is dense in the east and sparse in the west,which is bounded by the Hu line and the cities such as Beijing,Shanghai,Guangzhou and Chengdu as nodes to connect.There is a strong consistency between the population distribution center and the level of urban development.The urban human migration network is centered on provincial capitals or municipalities at the regional scale,showing a prominent'center-periphery'structure.COVID-19 dispersed the forces of human migration in time and changed the direction of human migration in space.But it did not change the pattern of national migration.The most critical factors influencing mass migration are income levels and traditional culture.This study reveals the impacts of major public health emergencies on conventional migration patterns and provides a scientific theoretical reference for COVID-19 prevention and control. | Debin Lu Wu Xiao Guoyu Xu Lin Ha Dongyang Yang | 2021 | Geography and Sustainability2021，2，4： | 2 |
| 5 | Effects of hepatocyte growth factor-mediated activation of Dll4-Notch-Hey2 signaling pathway显示文摘由支持 arteriogenesis 的背景 Hepatocyte 生长因素(HGF ) 享受 ischemic 疾病然而,它行动的机制不被知道。表明小径的槽口在 neovascularization 起一个重要作用。在增长和在 arteriogenesis 的过程表明小径的动脉 endothelial 房间和 Dll4-Notch-Hey2 的迁居能力之间的关系作为基于前期学习房间的 HGF.Methods 的行动的机制被调查,在人的大腿骨的动脉 endothelial 房间( HFAEC )被感染以后,上层清液在显示的时间被收获与在 200 pfu/cell 的 adenovirus-HGF ( Ad-HGF )。房间为 HGF 被分析由 ELISA 和反向的 transcription-PCR (RT-PCR ) 的表示和 Notch1, Dll4 和 Hey2 表示。在增长和 HFAEC 的移植能力的变化被 MTT 观察, Transwell 移植 experiments.Ad-GFP-infected HFAEC 与控制组相比被用作 control.Results Ad-HGF 组的 HGF 表达式没被 Notch1 的 HGF 与时间,和正式就职增加, Dll4 和 Hey2 基因抄写没随 HGF 的增加被提高。Ad-HGF-transduced HFAEC 的增长能力被提高,他们的迁居能力也通过激活表明小径的 Dll4-Notch-Hey2 面对 HGF.Conclusions 被提高, HGF 间接地支持增长和房间的迁居能力,以便后代动脉分支被形成。 | GAO Yu-fang HA Xiao-qin LU Tong-de HAN Juan-ping | 2011 | Chinese Medical Journal2011，，1： | 2 |
| 6 | Local staging of pancreatic cancer:criteria for unresectability of major vessels as revealed by pancreatic-phase,thin-section helical CT显示文摘 | Lu DSK Reber HA Krasny RM | | 0，，06： | 1 |
| 7 | Small peripancreatic veins: improved assessment in pancreatic cancer patients u sing thin section pancreatic phase helical CT 显示文摘 | Vedantham S Lu DS Reber HA | 1998 | AJR Am J Roentgenol1998，170，2： | 1 |
| 8 | Local staging of pancreatic carcinoma:criteria for unresectability of major vessels as revealed by pancreatic-phase,thin-section helical CT显示文摘 | Lu DS Reber HA Krasny RM | 1997 | AJR1997，168，6： | 1 |
| 9 | Local staging of pancreatic cancer:criteria for unresectability of major vessels as revealed by pancreatic-phase,thin-section helical CT显示文摘 | Lu DS Reber HA Krasny RM | 1997 | AJR Am J Roentgenol1997，168，6： | 1 |
| 10 | Hepatocyte growth factor gene transfer effects on the femoral and intramuscular nerve in a canine model of lower limb ischemia显示文摘BACKGROUND: Recent advancements in gene therapy have provided new methodology for treating ischemia in lower extremities. Gene transfer of angiogenic factors to ischemic tissues may promote local proliferation of new vessels and form collateral circulation. OBJECTIVE: To observe histopathological changes in the femoral and intramuscular nerve three months after intramuscular injection of hepatocyte growth factor (HGF) into the peripheral skeletal muscle in a canine model of lower limb ischemia. DESIGN: Randomized occlusion modelled and verification animal study. SETTING: Experimental Center, Lanzhou General Hospital of Lanzhou Military Area Command of Chinese PLA. MATERIALS: This study was performed at Animal Experimental Center, Lanzhou General Hospital of Lanzhou Military Area Command of Chinese PLA from September to November 2006. A total of eight male mongrel dogs, weighing 12–15 kg and 1.5–3 years of age, were selected for this study. This experimental study was in accordance with local ethics standards. Recombinant plasmid carrying HGF (pUDKH) and occlusion model plasmid (pUDK) were provided by the Third Laboratory of Radiation Medical Institute, Academy of Military Medical Sciences of PLA. METHODS: Grouping and model establishment: under anesthesia, complete vascular occlusion models were established on the left lower extremities. The experimental dogs were randomly divided into a model group and a pUDKH treatment group, with four dogs in each group. Dogs in the pUDKH group were injected with 0.15 mg/kg pUDKH. Ten minutes later, intramuscular injections were performed at three spots into the peripheral skeletal muscle of the left hind limb, as well as lateral injections at two spots. The injection volume at each spot was 0.2 mL. Dogs in the model group were injected with pUDK, and dosage and injection method were identical to the treatment group. MAIN OUTCOME MEASURES: Histopathological changes in the femoral nerve, as well as internal and external intramuscular nerve tissues in the hind limb of dogs three months after plasmid injection under optic microscope. RESULTS: (1) Histopathological changes in the femoral nerve: tiny nerves from the femoral nerve to the intramuscular nerve exhibited marked degeneration in the model group. The degenerating features included neurites, myelin sheaths, and Schwann cell nuclei. Neuropathy in the pUDKH treatment group was not detected. (2) Histopathological changes of the intramuscular nerve: large and irregular vacuoles were present on several longitudinal sections of intramuscular nerve fibers in the model group, as well as annular-shaped blank regions on transverse sections of peripheral neurites. In the pUDKH treatment group, large, blank regions were present in several segments of partial nerve fibers of the longitudinal intramuscular nerve region, but only a few nerve fibers exhibited annular-shaped blank regions on the transverse section of peripheral neurites. CONCLUSION: Local pUDKH injection may relieve or block femoral and intramuscular nerve tissue injury in a canine mocel of lower limb ischemia. | Xiaoqin Ha Bin Liu Zhen Qian Tongde LU Ling Hui Guanxian He Qiang Yin Tingxian Niu | 2008 | Neural Regeneration Research2008，3，6： | 1 |
| 11 | Translational repression and eIF4A2 activity are critical for microRNA-mediated gene regula- tion显示文摘 | Meijer HA Kong YW Lu WT | 2013 | Science2013，340，6128： | 1 |
| 12 | Local staging of Pancreatic cancer:Criteria for unresectability of major vessels as revealed by Pancreatic-Phase thin-section helical CT显示文摘 | Lu DS Reber HA Krasny RM | 1997 | AJR1997，168，： | 1 |
| 13 | Local Staging of Pancreatic Cancer: Criteria for Unresectability of Major Vessels as Revealed by Pancreatic-Phase, Thin-Section Helical CT 显示文摘 | Lu DSK Reber HA Krasny RM | 1997 | AJR1997，168，6： | 1 |
| 14 | Local staging of pancreatic cancer: criteria for unresectability of major vessels as revealed by pancreatic-phase, thin-section helical CT 显示文摘 | Lu DS Reber HA Krasny RM | 1997 | AJR Am J Roentgenol1997，168，6： | 1 |
| 15 | Local staging of pancreatic cancer: criteria for unresectability of major vessels as revealed by pancreatic phase thin section heli- cal CT显示文摘 | Lu DS Reber HA Krasny RM | 1997 | AJR1997，168，6： | 1 |
| 16 | Local staging of pancreatic cancer: criteria for unresectability of major vessels as revealed by pancreatic-phase, thin section helical CT 显示文摘 | Lu DS Reber HA Krasny RM | 1997 | Am J Roentgenol1997，168，： | 1 |
| 17 | Spinal morphine administration reduces the fatty acid contents in spinal cord and brain by increasing oxidative stress显示文摘 | Ozmen I Naziro(g)lu M Alici HA | | 0，，01： | 1 |
| 18 | Local staging of pancreatic cancer: criteria for unresectability of major vessels as revealed by pancreatic phase, thin-section helical CT 显示文摘 | Lu DS Reber HA Krasny RM | 1997 | AJR1997，168，： | 1 |
| 19 | local staging of Pancreatic cancer:criteria for unresectability of major vessels as revealed by Pa ncreatic-Phase,thin-section helical CT显示文摘 | Lu DS Reber HA Krasny RM | 1997 | AJB1997，168，6： | 1 |
| 20 | Cdcl4A and Cdc14B redundantly regulate DNA double-strand break repair显示文摘 | Lin H Ha K Lu G | 2015 | Mol Cell Biol2015，35，21： | 1 |
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