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| 1 | Estimation of the inter-frequency clock bias for the satellites of PRN25 and PRN01显示文摘We present two efficient approaches,namely the epoch-differenced(ED) and satellite-and epoch-differenced(SDED) approaches,for the estimation of IFCBs of the two Block IIF satellites.For the analysis,data from 18 stations from the IGS network spanning 96 d is processed.Results show that the IFCBs of PRN25 and PRN01 exhibit periodical signal of one orbit revolution with a magnitude up to 18 cm.The periodical variation of the IFCBs is modeled by a sinusoidal function of the included angle between the sun,earth and the satellite.The presented model enables a consistent use of L1/L2 clock products in L1/L5-based positioning.The algorithm is incorporated into the MGPSS software at SHAO(Shanghai Astronomical Observatory,Chinese Academy of Sciences) and is used to monitor the IFCB variation in near real-time. | LI HaoJun ZHOU XuHua WU Bin WANG JieXian | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，11： | 9 |
| 2 | Airworthiness Compliance Verification Method Based on Simulation of Complex System显示文摘A study is conducted on a new airworthiness compliance verification method based on pilot-aircraft-environment complex system simulation. Verification scenarios are established by 'block diagram' method based on airworthiness criteria. A pilotaircraft-environment complex model is set up and a virtual flight testing method based on connection of MATLAB/Simulink and Flightgear is proposed. Special researches are conducted on the modeling of pilot manipulation stochastic parameters and manipulation in critical situation. Unfavorable flight factors of certain scenario are analyzed, and reliability modeling of important system is researched. A distribution function of small probability event and the theory on risk probability measurement are studied. Nonlinear function is used to depict the relationship between the cumulative probability and the extremum of the critical parameter. A synthetic evaluation model is set up, modified genetic algorithm (MGA) is applied to ascertaining the distribution parameter in the model, and a more reasonable result is obtained. A clause about vehicle control functions (VCFs) verification in MIL-HDBK-516B is selected as an example to validate the practicability of the method. | XU Haojun LIU Dongliang XUE Yuan ZHOU Li MIN Guilong | 2012 | Chinese Journal of Aeronautics2012，25，5： | 9 |
| 3 | Effect of KBr on the micellar properties of CTAB显示文摘The effect of KBr on the size, shape and microviscosity of CTAB micelles has been investigated by means of laser light scattering (LLS), 1H NMR measurements and fluorescence probe. The data obtained from the various techniques are quantitatively in agreement. The Rh of micelles in 0.01 mol ·L-1 CTAB solution increases from 3.5 nm to 43 nm and Rg increases to 89 nm with addition of KBr salt. In this process, both the microviscosity and molecular weight of micelles Mw have noticeable increases, too. The rod-like micelles are formed at 0.1 mol ·L -1 KBr and the worm-like micelles are formed at above 0.2 mol ·L-1 KBr. | ZHANG Weican LI Ganzuo MU Jianhai SHEN Qiang ZHENG Liqiang LIANG Haojun WU Chi | 2000 | Chinese Science Bulletin2000，45，20： | 3 |
| 4 | Quantitative assessment of flight safety under atmospheric icing conditions显示文摘 | Zhou Li Xu Haojun Su Chen Lin Min | 2012 | High Technology Letters2012，18，1： | 3 |
| 5 | Aircraft nonlinear stability analysis and multidimensional stability region estimation under icing conditions显示文摘Icing is one of the crucial factors that could pose great threat to flight safety,and thus research on stability and stability region of aircraft safety under icing conditions is significant for control and flight.Nonlinear dynamical equations and models of aerodynamic coefficients of an aircraft are set up in this paper to study the stability and stability region of the aircraft under an icing condition.Firstly,the equilibrium points of the iced aircraft system are calculated and analyzed based on the theory of differential equation stability.Secondly,according to the correlation theory about equilibrium points and the stability region,this paper estimates the multidimensional stability region of the aircraft,based on which the stability regions before and after icing are compared.Finally,the results are confirmed by the time history analysis.The results can give a reference for stability analysis and envelope protection of the nonlinear system of an iced aircraft. | Liang QU Yinghui LI Haojun XU Dengcheng ZHANG Guoqiang YUAN | 2017 | Chinese Journal of Aeronautics2017，30，3： | 2 |
| 6 | Characteristics of leather tanned with nano - SiO2显示文摘 | Fan Haojun Li Ling Shi Bi | 2005 | Journal tithe American Leather Chemists Association2005，100，1： | 1 |
| 7 | Fast Estimation and Analysis of the Inter-frequency Clock Bias for Block IIF Satellites显示文摘 | LI Haojun ZHOU Xuhua WU Bin | 2013 | GPS Solutions2013，17，3： | 1 |
| 8 | Modeling and Initial Assessment of the Inter-frequency Clock Bias for COMPASS GEO Satellites显示文摘 | LI Haojun CHEN Yanling WU Bin | 2013 | Advances in Space Research2013，51，12： | 1 |
| 9 | Network Based Real-time Precise Point Positioning显示文摘 | LI Haojun CHEN Junping WANG Jiexian | 2010 | Advances in Space Research2010，46，9： | 1 |
| 10 | Tanning Characteristics and tanning mechanism of leather Tanned with of Nano-SiO2 显示文摘 | Haojun Fan Ling Li Bi Shi | 2004 | The Journal of the Society of Leather Technologists and Chemists2004，88，4： | 1 |
| 11 | The water vapor permeability of leather finished by thermal-responsive polyurethane显示文摘 | FAN Haojun LI Ling FAN Xinnian | 2005 | Journal of the Society of Leather Technologists and Chemists2005，，1： | 1 |
| 12 | Shape Transformations of Membrane Vesicles from Amphiphilie Triblock Copolymers: A Dissipative Particle Dynamics Simulation Study 显示文摘 | LI Xuejin Pivkin I V LIANG Haojun | 2009 | Maeromolecules2009，42，8： | 1 |
| 13 | The water vapor permeability of leather finished by thermore- sponsive polyurethane显示文摘 | Fan Haojun Li Ling Fan Xinnian | 2005 | Journal of the Society of Leather Technologists and Chemists2005，89，3： | 1 |
| 14 | MOFs-Based Nitric Oxide Therapy for Tendon Regeneration显示文摘Tendon regeneration is still a great challenge due to its avascular structure and low self-renewal capability.The nitric oxide(NO)therapy emerges as a promising treatment for inducing the regeneration of injured tendon by angiogenesis.Here,in this study,a system that NO-loaded metal–organic frameworks(MOFs)encapsulated in polycaprolactone(PCL)/gelatin(Gel)aligned coaxial scaffolds(NMPGA)is designed and prepared for tendon repair.In this system,NO is able to be released in vitro at a slow and stable average speed of 1.67 nM h^−1 as long as 15 d without a burst release stage in the initial 48 h.Furthermore,NMPGA can not only improve the tubular formation capability of endothelial cells in vitro but also obviously increase the blood perfusion near the injured tendon in vivo,leading to accelerating the maturity of collagen and recovery of biomechanical strength of the regenerated tendon tissue.As a NO-loaded MOFs therapeutic system,NMPGA can promote tendon regeneration in a shorter healing period with better biomechanical properties in comparison with control group by angiogenesis.Therefore,this study not only provides a promising scaffold for tendon regeneration,but also paves a new way to develop a NO-based therapy for biomedical application in the future. | Jun Chen Dandan Sheng Ting Ying Haojun Zhao Jian Zhang Yunxia Li He Xu Shiyi Chen | 2021 | Nano-Micro Letters2021，13，2： | 1 |
| 15 | Attenuation of diabetic nephropathy by Chaihuang-Yishen granule through anti-inflammatory mechanism in streptozotocin-induced rat model of diabetics显示文摘 | Haojun Zhang Tingting Zhao Yuewen Gong Xi Dong Weiku Zhang Sifan Sun Hua Wang Yanting Gu Xiaoguang Lu Meihua Yan Ping Li | 2014 | Journal of Ethnopharmacology2014，，： | 1 |
| 16 | The water vapor permeability of leather finished by thermal-responsive polyurethane显示文摘 | Fan Haojun Li Ling Shi Bi | 2005 | Journal of the Society of Leather Technologists and Chemists2005，，3： | 1 |
| 17 | Research on the Influence Degree and Effect of Support on Innovation Incentives for R&D Personnel in Micro and Small Enterprises:An Empirical Study based on the China Micro and Small Enterprise Survey(CMES)显示文摘In this study,the influence degree and effect of support on innovation incentives for research and development(R&D)personnel in micro and small enterprises(MSEs)were explored based on the CMES data.We found that government support will increase the R&D wage and widen the gap between R&D wage and staff wage,especially for small,non-high-tech enterprises with strict financing constraints.Furthermore,taking the wage gap as a mediator,we concluded that support would widen the wage gap and increase management innovation rather than technological innovation in MSEs because the wage premium of R&D personnel is the main driver for the increase of management innovation.The findings of this study provide useful enlightenment for China to implement an innovation-driven strategy and build an innovative country. | Xiong Yang Li Haojun Tang Jiqiang | 2022 | Contemporary Social Sciences2022，7，5： | 0 |
| 18 | Functional non-glutaraldehyde treated porcine pericardium for anti-coagulation,anti-calcification,and endothelial proliferation bioprosthetic heart valves显示文摘In the last decade,the number of transcatheter heart valve replacement for severe heart valve disease has increased exponentially.Although the bioprosthetic artificial heart valve(BHV)has similar fluid dynamics performance to the original heart valve compared with mechanical heart valve so that there is no need to take long-term anticoagulant drugs to prevent thromboembolism,transcatheter BHV replacement are still at risk for thrombosis during the first few months according to the clinical data.However,the use of antithrombotic drugs can also increase the risk of bleeding.Therefore,it is particularly important to improve the anticoagulant properties for the BHV itself.In this work,a kind of non-glutaraldehyde cross-linked BHV material with excellent antithrombotic ability has been prepared from carboxylated oxazolidine treated porcine pericardium(consisting of collagen,elastin and glycoprotein)with the further graft of the anticoagulant heparin sodium via hydrophilic modified chitosan.Along with the similar mechanical properties and collagen stability comparable to the glutaraldehyde cross-linked porcine pericardium(PP),these functional non-glutaraldehyde cross-linked PPs exhibit better biocompatibility,promoted endothelial proliferation and superior anti-calcification ability.More importantly,excellent anticoagulant activity can be observed in the hematological experiments in vivo and in vitro.In summary,these excellent performances make these functional non-glutaraldehyde cross-linked PPs great potentialities in the BHV applications. | Xiaotong Chen Tao Yu Qunshou Kong Dajun Kuang Hong Xu Zhiyu Zhao Li Yang Gaocan Li Haojun Fan Yunbing Wang | 2022 | Journal of Leather Science and Engineering2022，4，1： | 0 |
| 19 | Organosilicon leather coating technology based on carbon peak strategy显示文摘Based on the demand of carbon peak and carbon emission reduction strategy, divinyl-terminated polydimethyl-siloxane (ViPDMSVi), poly(methylhydrosiloxane) (PMHS), divinyl-terminated polymethylvinylsiloxane (ViPMVSVi), and fumed silica were used as primary raw materials, polydimethylsiloxane (PDMS) synthetic leather coating was in situ constructed by thermally induced hydrosilylation polymerization on the synthetic leather substrate. The effect of the viscosity of ViPDMSVi, the active hydrogen content of PMHS, the molar ratio of vinyl groups to active hydrogen, the dosage of ViPMVSVi and fumed silica on the performance of PDMS polymer coating, including mechanical properties, cold resistance, flexural resistance, abrasion resistance, hydrophobic and anti-fouling properties were investigated. The results show that ViPDMSVi with high vinyl content and PMHS with low active hydrogen content is more conducive to obtaining organosilicon coating with better mechanical properties, the optimized dosage of ViPMVSVi and fumed silica was 7 wt% and 40 wt%, respectively. In this case, the tensile strength and the broken elongation of the PDMS polymer coating reached 5.96 MPa and 481%, showing reasonable mechanical properties for leather coating. Compared with polyurethane based or polyvinyl chloride based synthetic leather, the silicon based synthetic leather prepared by this method exhibits excellent cold resistance, abrasion resistance, super hydrophobicity, and anti-fouling characteristics. | Wenkai Wang Haojun Fan Lijiang Song Zhenya Wang Heng Li Jun Xiang Qiang Huang Xiangquan Chen | 2022 | Journal of Leather Science and Engineering2022，4，1： | 0 |
| 20 | Design and test of the anti-skid system for self-propelled high-stem crop sprayers显示文摘Aiming at the problem of skidding in the operation of a self-propelled high-stem crop sprayer due to uneven road surface and uneven distribution of soil cohesive force,This study proposed a four-wheel drive hydraulic anti-skid control system based on RTM valve.Through theoretical analysis of control components such as the RTM valve and steering cylinder,the control model of the anti-skid drive system of the spray machine is established,and the simulation test is carried out in Matlab/Simulink.The simulation results show that the slip rate of the anti-skid drive system based on the PID control strategy is controlled below 0.05,and the RTM valve keeps the driving pressure of the system basically stable.In order to verify the reliability of the simulation results,the designed drive anti-skid control system was carried out on a spray machine for the field test.The experimental results show that the slip rate of the drive anti-skid system decreases from 86.7%to 1.25%when the anti-skid function is turned on,indicating that the designed drive anti-skid system has good anti-skid performance. | Haojun Wen Xinyue Liu Zhetian Yi Zhongxiang Li | 2023 | International Journal of Agricultural and Biological Engineering2023，16，6： | 0 |
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