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Spacelike Hypersurfaces of Prescribed Gauss-Kronecker Curvature in Exterior Domains

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Acta Mathematica Sinica,English Series 2009年第3期25卷 491-502页

作者： Yong HUANGWuhan Huai Yu JIAN ning su Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 P. R. China Department of Mathematical Sciences Tsinghua University Beijing 100084 P. R. China nsu@math tsinghua edu. cn

In this paper, we prove an existence theorem for spacelike convex hypersurfaces of prescribed Gauss curvature in Minkowski space.

关键词： Gauss-Kronecker curvature Minkowski space Monge-Ampere type equation

Neuroprotection mediated by natural products and their chemical derivatives

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Neural Regeneration Research 2020年第11期15卷 2008-2015页

作者： Fei Fei ning su Xia Li Zhou Fei Department of Ophthalmology Xijing Hospitalthe Fourth Military Medical UniversityXi’anShaanxi ProvinceChina Department of Radiation Oncology Xijing Hospitalthe Fourth Military Medical UniversityXi’anShaanxi ProvinceChina Department of Neurosurgery Xijing Hospitalthe Fourth Military Medical UniversityXi’anShaanxi ProvinceChina

Neuronal injuries can lead to various diseases such as neurodegenerative diseases,stroke,trauma,ischemia and,more specifically,glaucoma and optic *** cellular mechanisms that regulate neuronal death include calcium influx and calcium overload,excitatory amino acid release,oxidative stress,inflammation and microglial *** attention has been paid to the effective prevention and treatment of neuroprotective drugs by natural *** review summarizes the neuroprotective aspects of natural products,extracted from Panax ginseng,Camellia sinensis,soy and some other plants,and some of their chemical *** antioxidative and anti-inflammatory action and their inhibition of apoptosis and microglial activation are *** will provide new directions for the development of novel drugs and strategies to treat neurodegenerative diseases.

关键词： antioxidant effect brain injuries Camellia sinensis chemical derivatives curcumin genistein natural products neurodegenerative diseases neuroprotection Panax

The calculation of equivalence factor for ecological footprints in China： a methodological note

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Frontiers of Environmental Science & Engineering 2015年第6期9卷 1015-1024页

作者： Moucheng LIU Wenhua LI Dan ZAHNG ning su Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Dongcheng Educational Research Centre Beijing 100101 China

The Ecological Footprint （EF）, a physical indicator to measure the extent of humanity＇s use of natural resources, has gained much attention since it was first used by Wackemagel and Rees in 1996. In order to appraise land area types with different levels of productiv- ity, they introduced the concept of an equivalence factor. This relates to the average primary biomass productivities of different types of land （i.e. arable land, pasture, forest, water/fishery, built-up land and fossil energy land） to the regional average primary biomass productivity of all land types in a given year. Hence, the equivalence factor is an important parameter in the EF model and it directly affects the reliability of all results. Thus, this article calculates equivalence factors on the national and provincial levels in China based on Net Primary Production （NPP） from MODIS 1 km data in 2008. Firstly, based on the Light Utility Efficiency and CASA model, the NPP of different biologically productive lands of China and of different provinces was calculated. Secondly, China＇s equivalence factor for 6 land area types was calculated based on NPP： arable land and built-up land has an equivalence factor of 1.71, forest and fossil energy land has a factor of 1.41, pasture has a factor of 0.44 and water/fishery 0.35; Finally, the equivalence factor of 6 land area types in different provinces was also calculated. The NPP of each ecosystem type varies along with the equivalence factor in different provinces. However, the ranking of the equivalence factors in different provinces remain the same, with that of arable land being the largest, and the water/fishery being the smallest.

关键词： ecological footprint equivalence factor netprimary production biological capacity land types

Homer signaling pathways as effective therapeutic targets for ischemic and traumatic brain injuries and retinal lesions

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Neural Regeneration Research 2022年第7期17卷 1454-1461页

作者： Xiu-Quan Wu ning su Zhou Fei Fei Fei Department of Neurosurgery Xijing Hospitalthe Fourth Military Medical UniversityXi’anShaanxi ProvinceChina Department of Radiation Oncology Xijing Hospitalthe Fourth Military Medical UniversityXi’anShaanxi ProvinceChina Department of Ophthalmology Xijing Hospitalthe Fourth Military Medical UniversityXi’anShaanxi ProvinceChina

Ischemic and traumatic insults to the central nervous system account for most serious acute and fatal brain injuries and are usually characterized by primary and secondary *** damage presents the greatest challenge for medical staff;however,there are currently few effective therapeutic targets for secondary *** proteins are postsynaptic scaffolding proteins that have been implicated in ischemic and traumatic insults to the central nervous *** signaling can exert either positive or negative effects during such insults,depending on the specific subtype of Homer *** 1b/c couples with other proteins to form postsynaptic densities,which form the basis of synaptic transmission,while Homer 1a expression can be induced by harmful external *** 1c is used as a unique biomarker to reveal alterations in synaptic connectivity before and during the early stages of apoptosis in retinal ganglion cells,mediated or affected by extracellular or intracellular signaling or cytoskeletal *** review summarizes the structural features,related signaling pathways,and diverse roles of Homer proteins in physiological and pathological *** Homer 1a or downregulating Homer 1b/c may play a neuroprotective role in secondary brain *** also plays an important role in the formation of photoreceptor *** findings confirm the neuroprotective effects of Homer,and support the future design of therapeutic drug targets or gene therapies for ischemic and traumatic brain injuries and retinal disorders based on Homer proteins.

关键词： brain injury calcium signaling cerebral ischemia dendritic spine glutamate receptor Homer scaffolding protein neuron neuroprotection retinal ganglion cell review traumatic brain injury

Design and application of all-fused-ring electron acceptors

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Journal of Semiconductors 2024年第12期45卷 2-5页

作者： Kai Xiang ning su Jianhua Chen Junqiao Ding School of Chemical Science and Technology Yunnan UniversityKunming 650500China

Near-infrared(NIR)responsive compounds with narrow bandgaps play a crucial role in enhancing the photovoltaic efficiency of organic solar cells(OSCs)by effectively capturing high-energy NIR photons,as well as improving the NIR sensitivity of organic photodetectors(OPDs)through NIR light detection[1,2].The design principle based on electron-donating and accepting(D−A)structures has led to the development of numerous A−D−A or A−DA’D−A type NIR responsive molecules,such as ITIC and Y6.

关键词： fused narrow electron

Comparison of TGF-β_1 in tears and corneal haze following Epi-LASIK with and without mitomycin C

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International Journal of Ophthalmology(English edition) 2013年第3期6卷 312-315页

作者： Jing Chen Yi Chen su-ning Han Department of Ophthalmology Guangzhou General Hospital of Guangzhou Military Command Training Center Guangzhou General Hospital of Guangzhou Military Command

AIM: To compare transforming growth factor-β1 (TGF- β1 ) levels in tears and the degree of corneal haze formation following epithelial laser in situ keratomileusis (Epi -LASIK) with and without the use of mitomycin C (MMC) and to investigate the effect of MMC on corneal wound healing. ·METHODS: Thirty-two patients (64 eyes) with high myopia underwent Epi -LASIK surgery, and MMC was randomly used in one eye in each patient. The epithelialization process was observed, and the TGF -β1 level in tears was measured at 1 day, 3, and 7 days postoperatively for comparison with baseline. Corneal haze was graded at 1 month, 3, and 6 months after surgery. · REsuLTS: Mean preoperative spherical equivalent refraction was -8.24 ±2.18D (range-6.00 to -10.50D) in the MMC group and -7.82±1.55D (range -6.00 to -9.75D) in the non -MMC group. There was no significant difference between the two groups (P =0.38). Mean epithelialization time was (5.02 ±0.68) days in the MMC group and (4.86±0.57) days in the non-MMC group (P = 0.31). Tear fluid TGF-β1 levels were similar before surgery (P =0.34), but were significantly higher in the non-MMC group at 1 day, 3, and 7 days postoperatively (P =0.004, 0.008, and 0.012, respectively). Corneal haze scores 1 month after surgery were significantly higher in the non -MMC group (P =0.03), and similar at 3 and 6 months after surgery (P =0.28 and 0.62, respectively). ·CONCLUSION: MMC did not delay epithelialization. Inearly postoperative period, lower TGF -β1 levels in tears and a lower grade of corneal haze were observed in the MMC group. Our findings suggest that the ability of MMC to inhibit Epi -LASIK -induced haze might be mediated through TGF-β1 suppression.

关键词： Epi-LASIK MMC TGF-β1 haze

Variable rate fertilization system with adjustable active feed-roll length

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International Journal of Agricultural and Biological Engineering 2015年第4期8卷 19-26页

作者： su ning Xu Taosheng Song Liangtu Wang Rujing Wei Yuanyuan Department of Automation University of Science and Technology of ChinaHefei 230026China Institute of Intelligent Machines Chinese Academy of SciencesHefei 230031China

This paper presented a novel variable rate fertilization system based on the method of adjusting the active feed-roll length of a fluted *** feasibility of this method was discussed using analysis of the fluted roller *** seed drill produced by Kuhn Company(France),which could sow and fertilize simultaneously,was used as a test platform to implement the mechanical structure of variable rate *** design methods for the variable rate fertilization mechanical structure and actuator were introduced in detail.A low-cost and stable embedded support decision subsystem and corresponding software were *** support decision subsystem is based on grid *** grid field cell contains information about corresponding spatial position and fertilizer application rate.A SpatiaLite database was employed to solve the spatial location search and spatial data *** were conducted to evaluate the fertilization uniformity and dynamic response *** average value of coefficient of variation is 8.4%in five different active feed-roll lengths which reflects good *** dynamic response times for the adjustment of variable rate fertilization system from 204 kg/hm^(2) to 319 kg/hm^(2) and 319 kg/hm^(2) to 204 kg/hm^(2) are about 4.2 *** results suggest that the variable rate fertilization system performs well in dynamic adjustment and stability.

关键词： precision agriculture variable rate fertilization fluted roller active feed-roll length servo drive embedded system

Ground-state phases and spin textures of spin–orbit-coupled dipolar Bose–Einstein condensates in a rotating toroidal trap

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Chinese Physics B 2020年第11期29卷 446-456页

作者： Qing-Bo Wang Hui Yang ning su Ling-Hua Wen Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China School of Physics and Technology Tangshan Normal UniversityTangshan 063000China Department of Physics Xinzhou Teachers UniversityXinzhou 034000China

We investigate the ground-state phases and spin textures of spin-orbit-coupled dipolar pseudo-spin-1/2 Bose-Einstein condensates in a rotating two-dimensional toroidal *** combined effects of dipole-dipole interaction(DDI),spin-orbit coupling(SOC),rotation,and interatomic interactions on the ground-state structures and topological defects of the system are analyzed *** fixed SOC strength and rotation frequency,we provide a set of phase diagrams as a function of the DDI strength and the ratio between inter-and intra-species *** system can show rich quantum phases including a half-quantum vortex,symmetrical(asymmetrical)phase with quantum droplets(QDs),asymmetrical segregated phase with hidden vortices(ASH phase),annular condensates with giant vortices,triangular(square)vortex lattice with QDs,and criss-cross vortex string lattice,depending on the competition between DDI and contact *** given DDI strength and rotation frequency,the increase of the SOC strength leads to a structural phase transition from an ASH phase to a tetragonal vortex lattice then to a pentagonal vortex lattice and finally to a vortex necklace,which is also demonstrated by the momentum *** rotation,the interplay of DDI and SOC may result in the formation of a unique trumpet-shaped Bloch domain *** addition,the rotation effect is ***,the system supports exotic topological excitations,such as a half-skyrmion(meron)string,triangular skyrmion lattice,skyrmion-halfskyrmion lattice,skyrmion-meron cluster,skyrmion-meron layered necklace,skyrmion-giant-skyrmion necklace lattice,and half-skyrmion-half-antiskyrmion necklace.

关键词： Bose-Einstein condensate dipole-dipole interaction spin-orbit coupling topological defects

Establishment of Chlamydomonas reinhardtii chloroplast expression

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Chinese Science Bulletin 1999年第18期44卷 1659-1664页

作者： Guochang Fan ning su Zhonglin Zhang Xiangfu Wu Guifang Shen Chinese Acad Agr Sci Biotech Res Ctr Beijing 100081 Peoples R China Beijing Inst Radiat Med Beijing 100850 Peoples R China Chinese Acad Sci Shanghai Inst Biochem Shanghai 200031 Peoples R China

An expression vector pACⅢ containing the chimeric gene HAV- VP3P1 and HCV-C gene has been constructed and transferred to C. reinhardtii by the biolistic method. The trans-formants have been identified by PCR, Southern-blotting, Northern-blotting and Western-blotting assays after selecting on resistant medium and incubating in the dark. The results

关键词： HAV-VP3P1 gene HCV-C gene C. reinhardtii chloroplast expression system homologous recombinant.