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| 1 | Research on Solar Simulation System for Test of Solar Radiation Measuring Instrument显示文摘Since traditional solar simulators are mainly applied to spacecraft and photovoltaic industry,they are not suitable for solar radiation measuring instrument test. Therefore,a deep research is carried out on solar simulators to test of solar radiation measuring instrument,so that obtain the requirements of performance test of solar radiation measuring instrument. With a combination of the requirements for national regulations of metrological verification and performance test of pyranometer and pyrheliometer,it lays emphasis on the research of design methods for improving radiation uniformity and stability of solar simulators; it also focuses on design methods of multidimensional detection workbench,which achieves different detection of solar radiation. After practical test,solar irradiation is within Φ60 mm; irradiation non-uniformity is better than ±0.8%; instability is better than ±0.72%;rotating angle precision is better than 0.09°. Then,solar simulator is used to carry out pyranometer sensitivity test,pyranometer directional response test,pyranometer tilt response test and non-linearity test for radiation instruments. Test results showthat the solar simulator meets the testing requirements of solar radiation measuring instruments. | ZhengRu Zhang Guoyu Lyu Wenhua Yan Jiajun Su Shi Zhang Jian | 2017 | Instrumentation2017，4，1： | 5 |
| 2 | Environmentally stable Er-fiber mode-locked pulse generation and amplification by spectrally filtered and phase-biased nonlinear amplifying long-loop mirror显示文摘We report on environmentally stable long-cavity ultrashort erbium-doped fiber lasers,which self-start mode-locking at quite low thresholds by using spectrally filtered and phase-biased nonlinear amplifying long-loop mirrors.By employing 100-m polarization-maintaining fiber(PMF)in the nonlinear loop,the fundamental repetition rate reaches 1.84 MHz and no practical limitation is found to further decrease the repetition rate.The filter used in the long loop not only suppresses Kelly sidebands of the solitons,but also eliminates the amplified spontaneous emission which exists widely in lowrepetition-rate ultrafast fiber lasers.The bandwidth of the filter is optimized by using a numerical model.The laser emits approximately 3-ps pulses with an energy of 17.4 p J,which is further boosted to 1.5μJ by using a fiber amplifier. | Zhengru Guo Qiang Hao Junsong Peng Heping Zeng | 2019 | High Power Laser Science and Engineering2019，7，3： | 3 |
| 3 | Protective effects of nerve regeneration factor and brain-derived neurotrophic factor on retinal ganglion cells in a rabbit model of acute hyper-intraocular pressure显示文摘BACKGROUND:Previous studies have shown that nerve regeneration factor (NRF) provides neuroprotective effects. However,the neuroprotective effects on retinal ganglion cells in an animal model of glaucoma remain uncertain. OBJECTIVE:To determine the neuroprotective effects of NRF on retinal ganglion cells in a rabbit model of acute hyper-intraocular pressure and to compare the effects on brain-derived neurotrophic factor (BDNF). DESIGN,TIME AND SETTING:A randomized,controlled,animal experiment was performed at Jiangsu Provincial Key Laboratory of Neural Regeneration from September 2006 to August 2007. MATERIALS:Sterone,a major component of NRF,was provided by the Key Laboratory of Neural Regeneration,Nantong University in China; BDNF was provided by BioDesign Inc.,USA. METHODS:A total of 24 healthy rabbits were randomly assigned to NRF,BDNF,and phosphate buffered saline groups,with 8 rabbits per group. The left eyes were considered normal controls,and acute hyper-intraocular pressure was induced in the right eyes via anterior chamber perfusion. The right camera vitrea bulbi was injected with 4.5 μg NRF,3.75 μg BDNF,or 5 μL 0.1 mol/L phosphate buffered saline,respectively. MAIN OUTCOME MEASURES:Retinal ganglion cells were reverse-labeled using horseradish peroxidase to quantify cell density at 2,4,and 6 mm from the optic disc edge. RESULTS:NRF increased the number of surviving retinal ganglion cells at the optic disc edge (P < 0.01 or P < 0.05). The density of surviving retinal ganglion cells decreased with increasing distance from the optic disc. The number of retinal ganglion cells in the BDNF group was similar to the NRF group (P > 0.05). At 2,4,and 6 mm away from the optic disc edge,there was no significant difference in retinal ganglion cell density between NRF and BDNF groups (P > 0.05). CONCLUSION:NRF provided protection to retinal ganglion cells in a rabbit model of acute hyper-intraocular pressure,i.e.,NRF enhanced the survival rate of retinal ganglion cells. The neuroprotective effect was similar to BDNF. | Zhengru Huang Huaijin Guan Fei Ding Xiaosong Gu | 2010 | Neural Regeneration Research2010，5，6： | 1 |
| 4 | An Adaptive Time-Stepping Strategy for the Cahn-Hilliard Equation显示文摘This paper studies the numerical simulations for the Cahn-Hilliard equation which describes a phase separation phenomenon.The numerical simulation of the Cahn-Hilliardmodel needs very long time to reach the steady state,and therefore large time-stepping methods become useful.The main objective of this work is to construct the unconditionally energy stable finite difference scheme so that the large time steps can be used in the numerical simulations.The equation is discretized by the central difference scheme in space and fully implicit second-order scheme in time.The proposed scheme is proved to be unconditionally energy stable and mass-conservative.An error estimate for the numerical solution is also obtained with second order in both space and time.By using this energy stable scheme,an adaptive time-stepping strategy is proposed,which selects time steps adaptively based on the variation of the free energy against time.The numerical experiments are presented to demonstrate the effectiveness of the adaptive time-stepping approach. | Zhengru Zhang Zhonghua Qiao | 2012 | Communications in Computational Physics2012，11，4： | 1 |
| 5 | Seismic hazard expression in risk assessment显示文摘 | Tao Xiaxin Tao Zhengru Li Ping | 2007 | Earthquake Resistant Engineering Structures Ⅵ2007，，： | 1 |
| 6 | ENERGY STABLE NUMERICAL METHOD FOR THE TDGL EQUATION WITH THE RETICULAR FREE ENERGY IN HYDROGEL显示文摘这里,我们关于大分子 microsphere 集中于阶段分离的数字模拟合成(MMC ) hydrogel。模型基于时间依赖者 Ginzburg 四轮马车(TDGL ) 有网状的免费精力的方程。一无条件地,精力马厩差别计划基于相应精力的凸的切开被建议功能。在数字实验,我们观察到模仿阶段分离的整个过程要求一更加长的时间。我们也注意到全部的免费精力在起始的舞台显著地变化并且在下列时间稍微变化。把性质基于这些,我们使用走策略改进计算效率的适应时间。时间步 adaptivity 的应用程序不能仅仅决定解决方案的动态变化精确地而且显著地为长时间模拟节省中央处理器时间,这被发现。 | Dong Liao Hui Zhang Zhengru Zhang | 2017 | Journal of Computational Mathematics2017，35，1： | 0 |
| 7 | Moving Mesh Method with Conservative Interpolation Based on L2-Projection显示文摘We develop an efficient one-dimensional moving mesh algorithm for solving partial differential equations.The main contribution of this paper is to design an effective interpolation scheme based on L2-projection for the moving mesh method.The proposed method preserves not only the mass-conservation but also the first order momentum of the underlying numerical solution at each mesh redistribution step.Numerical examples are presented to demonstrate the effectiveness of the new interpolation technique. | Zhengru Zhang | 2006 | Communications in Computational Physics2006，1，5： | 0 |
| 8 | Autumn nitrogen enrichment destabilizes ecosystem biomass production in a semiarid grassland显示文摘Nitrogen(N)deposition decreases the temporal stability of ecosystem aboveground biomass production(ecosystem stability).However,little is known about how the responses of ecosystem stability differ based on seasonal N enrichment.By adding N in autumn,winter,or growing season,from October 2014 to May 2020,in a temperate grassland in northern China,we found that only N addition in autumn resulted in a significantly positive correlation between ecosystem mean aboveground net primary productivity(ANPP)and its standard deviation and significantly reduced ecosystem stability.Autumn N-induced reduction in ecosystem stability was associated with the vanished negative effect of community-wide species asynchrony(asynchronous dynamics among populations to environmental perturbations)on the standard deviation of ecosystem ANPP in combination with the emerged positive effect of dominance(Simpson's dominance index that indicates the relative weight of dominant species in a community).Our findings indicate that autumn N addition might overestimate the negative effect of annual atmospheric N deposition on ecosystem stability,suggesting that to better evaluate the influence of N deposition in temperate grasslands,both field experiments and global modeling should consider not only the annual N load but also its seasonal dynamics.Moreover,further studies should pay more attention to the alteration in the ecosystem temporal deviations,which might be more sensitive to human-induced environmental changes. | Yuqiu Zhang Zhengru Ren Haining Lu Xu Chen Ruoxuan Liu Yunhai Zhang | 2023 | Fundamental Research2023，3，2： | 0 |
| 9 | NF-κB downstream miR-1262 disturbs colon cancer cell malignant behaviors by targeting FGFR1显示文摘Despite substantial advancements in screening,surgery,and chemotherapy,colorectal cancer remains the second most lethal form of the disease.Nuclear factor kappa B(NF-κB)signaling is a critical driver facilitating the malignant transformation of chronic inflammatory bowel diseases.In this study,deregulated miRNAs that could play a role in colon cancer are analyzed and investigated for specific functions in vitro using cancer cells and in vivo using a subcutaneous xenograft model.miRNA downstream targets are analyzed,and predicted binding and regulation are verified.miR-1262,an antitumor miRNA,is downregulated in colon cancer tissue samples and cell lines.miR-1262 overexpression suppresses colon cancer malignant behaviors in vitro and tumor development and metastasis in a subcutaneous xenograft model and a lung metastasis mouse model in vivo.miR-1262 directly targets fibroblast growth factor receptor 1(FGFR1)and inhibits FGFR1 expression.FGFR1 overexpression shows oncogenic functions through the regulation of cancer cell proliferation,invasion,and migration;when cotransfected,lv-FGFR1 partially attenuates the antitumor effects of agomir-1262.NF-κB binds to the miR-1262 promoter region and inhibits tran-scription activity.The NF-κB inhibitor CAPE exerts antitumor effects;miR-1262 inhibition partially reverses CAPE effects on colon cancer cells.Conclusively,miR-1262 serves as an antitumor miRNA in colon cancer by targeting FGFR1.The NF-κB/miR-1262/FGFR1 axis modulates colon cancer cell phenotypes,including proliferation,invasion,and migration. | Weilin Zhang Zhongcheng Huang Zhigang Xiao Hui Wang Qianchao Liao Zhengru Deng Deqing Wu Junjiang Wang Yong Li | 2023 | Acta Biochimica et Biophysica Sinica2023，55，11： | 0 |
| 10 | 温带半干旱草原克隆禾草叶性状对氮沉降铵硝比输入的响应:叶序不可忽略显示文摘叶片是植物光合作用的主要器官。叶片可塑性在很大程度上决定了植物对富氮环境的适应。然而在自然条件和富氮环境中,测定植物叶片性状时需要采集的最佳数量或比例是否一致并不明确;同时大气氮沉降主要组分铵态氮与硝态氮比例变化是否会改变叶片最佳测量数量缺少实验证据支撑。因此本研究依托自2014年在中国北方温带草原开展的铵硝比添加实验(即对照和5:1、1:1和1:5的NH_(4)^(+)-N/NO_(3)^(−)-N比例),于2020年8月(植物群落生物量高峰时期)测量了两个形态相似的优势多年生禾本科物种(即羊草和冰草)在叶序水平的叶面积、叶厚度和叶绿素含量。我们发现在对照处理(自然条件),除羊草叶面积需要测定5片(占单株总叶片数的78.82%),其它性状通过测量两片完全展开叶即可代表整株该叶性状的单叶平均特征。铵硝比添加处理显著改变了叶性状最大值所在叶序,导致需要增加叶片测定数才能代表整株叶片的单叶平均特征。铵硝比添加显著改变了受叶序调控的叶性状间权衡关系,即叶片虽变大却变薄。因此,本研究结果表明,通过测量全部完全展开叶或者提供一个合适的尺度推绎参数方能更好地评估氮沉降效应下植株叶片性状的响应特征。 | Ruoxuan Liu Jungang Chen Zhengru Ren Xu Chen Haining Lu Yuqiu Zhang Yunhai Zhang | 2023 | Journal of Plant Ecology2023，16，4： | 0 |
| 11 | On a Large Time-SteppingMethod for the Swift-Hohenberg Equation显示文摘The main purpose of this work is to contrast and analyze a large timestepping numerical method for the Swift-Hohenberg(SH)equation.This model requires very large time simulation to reach steady state,so developing a large time step algorithm becomes necessary to improve the computational efficiency.In this paper,a semi-implicit Euler schemes in time is adopted.An extra artificial term is added to the discretized system in order to preserve the energy stability unconditionally.The stability property is proved rigorously based on an energy approach.Numerical experiments are used to demonstrate the effectiveness of the large time-stepping approaches by comparing with the classical scheme. | Zhengru Zhang Yuanzi Ma | 2016 | Advances in Applied Mathematics and Mechanics2016，8，6： | 0 |
| 12 | 风浪方向不一致对风机叶片对接过程中撞击速度、叶根损伤和结构安全评估的影响分析显示文摘Most wind turbine blades are assembled piece-by-piece onto the hub of a monopile-type offshore wind turbine using jack-up crane vessels.Despite the stable foundation of the lifting cranes,the mating process exhibits substantial relative responses amidst blade root and hub.These relative motions are combined effects of wave-induced monopile motions and wind-induced blade root motions,which can cause impact loads at the blade root’s guide pin in the course of alignment procedure.Environmental parameters including the wind-wave misalignments play an important role for the safety of the installation tasks and govern the impact scenarios.The present study investigates the effects of wind-wave misalignments on the blade root mating process on a monopile-type offshore wind turbine.The dynamic responses including the impact velocities between root and hub in selected wind-wave misalignment conditions are investigated using multibody simulations.Furthermore,based on a finite element study,different impact-induced failure modes at the blade root for sideways and head-on impact scenarios,developed due to wind-wave misalignment conditions,are investigated.Finally,based on extreme value analyses of critical responses,safe domain for the mating task under different wind-wave misalignments is compared.The results show that although misaligned wind-wave conditions develop substantial relative motions between root and hub,aligned wind-wave conditions induce largest impact velocities and develop critical failure modes at a relatively low threshold velocity of impact. | Amrit Shankar Verma Zhiyu Jiang Zhengru Ren Zhen Gao Nils Petter Vedvik | 2020 | Journal of Marine Science and Application2020，19，2： | 0 |
| 13 | The Study on the Strong Ground Motion Attenuation Relationship in the Pishan Area,Xinjiang Uygur Autonomous Region显示文摘Small earthquake data from the Pishan MS6.5 aftershocks is collected by the Xinjiang Regional Digital Seismic Observation Network.Five parameters of the focal region are obtained by micro genetic inversion:stress dropΔσof 75.95 bars,quality factor parameters Q0of 186.33 andηof 0.26,geometric attenuation parameters R1of 72.18km and R2of 139.70km.We calculate the Fourier spectrum and combine it with the random phase spectrum to get the ground motion time history,and build the strong motion acceleration attenuation relationship.The strong ground motion acceleration attenuation of the Pishan area is thus obtained.Because of the insufficiency of strong ground motion records,we added the records from the Wuqia MS6.9 earthquake on October 5,2008,the Akto MS6.2 earthquake on October 6,2008,and the Lop MS6.0 earthquake on March 9,2012 to the data.The comparison of the calculation results and the empirical attenuation relationships with strong ground motion records reveal that the strong motion data of Pishan and Lop earthquakes is higher than the empirical attenuation relationships.The Wuqia MS6.9 earthquake strong motion data is consistent with Yu Yanxiangs(2013)short axis result,and lower than the present result. | Li Wenqian Tao Zhengru Wei Bin He Jingang | 2018 | Earthquake Research in China2018，32，1： | 0 |
| 14 | The Taiwan Question China From the Perspective of International Crisis Management:History and Future显示文摘The Taiwan Question China discussed in this paper belongs to the theoretical crisis discussion on international relations and does not regard the Cross-Strait relations as relations between different countries.The outcome of the 2024 Taiwan Election has a great impact on the Taiwan question,the latest poll shows that the possibility of the Democratic Progressive Party(DPP)candidate to come to power is still very high,because its political evolution trend of Taiwan independence still exists. | ZHANG Sheng WU Zhengru | 2023 | International Relations and Diplomacy2023，11，4： | 0 |
| 15 | Reproductive height determines the loss of clonal grasses with nitrogen enrichment in a temperate grassland显示文摘Tall clonal grasses commonly display competitive advantages with nitrogen(N)enrichment.However,it is currently unknown whether the height is derived from the vegetative or reproductive module.Moreover,it is unclear whether the height of the vegetative or reproductive system regulates the probability of extinction and colonization,and determines species diversity.In this study,the impacts on clonal grasses were studied in a field experiment employing two frequencies(twice a year vs.monthly)crossing with nine N addition rates in a temperate grassland,China.We found that the N addition decreased species frequency and increased extinction probability,but did not change the species colonization probability.A low frequency of N addition decreased species frequency and colonization probability,but increased extinction probability.Moreover,we found that species reproductive height was the best index to predict the extinction probability of clonal grasses in N-enriched conditions.The low frequency of N addition may overestimate the negative effect from N deposition on clonal grass diversity,suggesting that a higher frequency of N addition is more suitable in assessing the ecological effects of N deposition.Overall,this study illustrates that reproductive height was associated with the clonal species extinction probability under N-enriched environment. | Xu Chen Haining Lu Zhengru Ren Yuqiu Zhang Ruoxuan Liu Yunhai Zhang Xingguo Han | 2024 | Plant Diversity2024，46，2： | 0 |
| 16 | A Second Order Accurate in Time, Energy Stable Finite Element Scheme for the Flory-Huggins-Cahn-Hilliard Equation显示文摘In this paper, we propose and analyze a second order accurate in time, masslumped mixed finite element scheme for the Cahn-Hilliard equation with a logarithmic Flory-Huggins energy potential. The standard backward differentiation formula (BDF)stencil is applied in the temporal discretization. In the chemical potential approximation,both the logarithmic singular terms and the surface diffusion term are treatedimplicitly, while the expansive term is explicitly updated via a second-order Adams-Bashforth extrapolation formula, following the idea of the convex-concave decompositionof the energy functional. In addition, an artificial Douglas-Dupont regularizationterm is added to ensure the energy dissipativity. In the spatial discretization, the masslumped finite element method is adopted. We provide a theoretical justification of theunique solvability of the mass lumped finite element scheme, using a piecewise linearelement. In particular, the positivity is always preserved for the logarithmic argumentsin the sense that the phase variable is always located between -1 and 1. In fact, thesingular nature of the implicit terms and the mass lumped approach play an essentialrole in the positivity preservation in the discrete setting. Subsequently, an unconditionalenergy stability is proven for the proposed numerical scheme. In addition, theconvergence analysis and error estimate of the numerical scheme are also presented.Two numerical experiments are carried out to verify the theoretical properties. | Maoqin Yuan Wenbin Chen Cheng Wang Steven M.Wise Zhengru Zhang | 2022 | Advances in Applied Mathematics and Mechanics2022，14，6： | 0 |
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