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| 1 | Quasi-equilibrium glide adaptive guidance for hypersonic vehicles显示文摘The entry-glide guidance strategy for hypersonic vehicles that can satisfy both terminal and path constraints is investigated in this paper.We propose a quasi-equilibrium glide adaptive guidance methodology based on the quasi-equilibrium glide condition(QEGC),which innovatively utilizes the quasi-equilibrium glide phenomenon in lifting entry.With the aid of QEGC,both range and terminal velocity can be predicted analytically with high precision.The path constraints are converted into angle of attack constraints,which has been difficult to realize by using traditional predictive guidance methods.The algorithm is independent of the standard trajectory.All the guidance commands,including the bank angle and the angle of attack,are calculated analytically in real time,which endows the algorithm with sufficient adapbility.The results of a CAV-H vehicle guidance test show that the algorithm leads the vehicle along a quasi-equilibrium glide trajectory satisfying both the terminal and path constraints and has sufficient flexibility for occasional mission changes.Furthermore,the robustness of the guidance algorithm under disturbances is validated through a Monte Carlo simulation. | XU MingLiang CHEN KeJun LIU LuHua TANG GuoJian | 2012 | Science China(Technological Sciences)2012，55，3： | 30 |
| 2 | Nonlinear hierarchy-structured predictive control design for a generic hypersonic vehicle显示文摘A hierarchy-structured predictive controller is designed and analyzed for rotation motion dynamics of a generic hypersonic vehicle(GHV).This vehicle model has fast variability,is highly nonlinear,and includes uncertain parameters.The controller contains two subsystems,the inner-fast-loop nonlinear generable predictive controller(NGPC)and the outer-slow-loop NGPC,both of which are designed by the closed-form optimal generable predictive control method.Thus,the heavy on-line computational burden in the classical predictive control method is avoided.The hierarchy structure of the control system decreases the relative degree of each subsystem and helps increase the dynamic response speed of the attitude controller.In order to improve the robustness of the control system,a feedback correction algorithm is proposed that corrects the calculation error between the predictive model and the real dynamic model.Simulation studies are conducted for the trimmed cruise conditions of an altitude of 33.5 km and Mach 15 to investigate the responses of the vehicle to the step commands of angle of attack,sideslip angle,and bank angle.The simulation studies demonstrate that the proposed controller is robust with respect to the parametric uncertainties and atmospheric disturbance,and meets the performance requirements of GHV with acceptable control inputs. | WANG Peng TANG GuoJian LIU LuHua WU Jie | 2013 | Science China(Technological Sciences)2013，56，8： | 18 |
| 3 | Integrated method of guidance,control and morphing for hypersonic morphing vehicle in glide phase显示文摘The morphing technology of hypersonic vehicle improved the flight performance by changing aerodynamic characteristics with shape deformations,but the design of guidance and control system with morphing laws remained to be explored.An Integrated of Guidance,Control and Morphing(IGCM)method for Hypersonic Morphing Vehicle(HMV)was developed in this paper.The IGCM method contributed to an effective solution of morphing characteristic to improve flight performance and reject the disturbance for guidance and control system caused by the morphing system for HMV in gliding phase.The IGCM models were established based on the motion models and aerodynamic models of the variable span vehicle.Then the IGCM method was designed by adaptive block dynamic surface back-stepping method with stability proof.The parallel controlled simulations’results showed the effectiveness in accomplishing the flight mission of IGCM method in glide phase with smaller terminal errors.The velocity loss of HMV was reduced by 32.8%which inferred less flight time and larger terminal flight velocity than invariable span vehicle.Under the condition of large deviations of aerodynamic parameters and atmospheric density,the robustness of IGCM method with variable span was verified. | Cunyu BAO Peng WANG Guojian | 2021 | Chinese Journal of Aeronautics2021，34，5： | 16 |
| 4 | Association of KIR Genotypes and Haplotypes with Susceptibility to Chronic Hepatitis B Virus Infection in Chinese Han Population显示文摘Killer immunoglobulin-like receptor (KIR) genes can regulate the activation of NK and T cells upon interaction with HLA class I molecules. Hepatitis B virus (HBV) infection has been regarded as a multi-factorial disorder disease. Previous studies revealed that KIRs were involved in HCV and HIV infection or clearance. The aim of this study was to explore the possibility of the inheritance of KIR genotypes and haplotypes as a candidate for susceptibility to persistent HBV infection or HBV clearance. The sequence specific primer polymerase chain reaction (SSP-PCR) was employed to identify the KIR genes and pseudogenes in 150 chronic hepatitis B (CHB) patients, 251 spontaneously recovered (SR) controls, and 412 healthy controls. The frequencies of genotype G, M, FZ1 increased in CHB patients compared with healthy control subjects. The frequency of genotype AH was higher in SR controls than that in both CHB patients and healthy controls. The carriage frequencies of genotype G and AH were higher; while, the frequencies of AF and AJ were lower in SR controls than those in healthy control subjects. The frequency of A haplotype was lower, whereas, the frequency of B haplotype was higher in CHB patients and SR controls than those in healthy controls. In healthy controls, haplotype 4 was found lower compared with that in CHB patients and SR controls and the frequency of haplotype 5 was higher in SR controls than that in other two groups. Based on these findings, it seems that the genotypes M and FZ1 are HBV susceptive genotypes; AH, on the other hand, may be protective genotypes that facilitate the clearance of HBV. It appears that the haplotype 4 is HBV susceptive haplotype, whereas, haplotype 5 may be the protective haplotype that facilitates the clearance of HBV. | Zhiming Lu Bingchang Zhang Shijun Chen Zhongtao Gai Zhaolei Feng Xiangdong Liu Yiqing Liu Xin Wen Li Li Yulian Jiao Chunyan Ma Song Shao Xiangfa Cui Guojian Chen Jianfeng Li Yneran Zhao | 2008 | Cellular & Molecular Immunology2008，5，6： | 13 |
| 5 | Research on basic characteristics of complex system brittleness显示文摘Tbe goal of this paper is to research one new characteristic of complex system. Brittleness, which is one new characteritic of complex system, is presented in this paper. The linguistic and qualitative descriptions of complex system are also given in this paper.Otherwise, the qualitative description of complex system is presented at first. On the basis of analyzing the existing brittleness problems, linguistic description and mathematic description of brittleness are given as well. Three kinds of phenomena to judge brittleness of complex system are also given, based on catastrophe theory. Basic characteristics of brittleness are given on the basis of its mathematic description. Two critical point sets are defined by using catastrophe theory. The definition of brittleness and its related theory can serve the control of complex system, and provide theoretical basis for the design and control of complex system. | JINHong-zhang GUOJian WEIQi LINDe-ming LIQi | 2004 | Journal of Marine Science and Application2004，3，1： | 10 |
| 6 | Curative effect of Dingqi analgesic patch on cancer pain:a single-blind randomized controlled trail显示文摘OBJECTIVE:To observe the curative effect of an acupoint application with a Dingqi analgesic patch on moderate to severe pain caused by liver cancer.METHODS:Forty patients with moderate to severe pain caused by liver cancer were randomly divided intoatreatmentgroup(TG)andacontrolgroup(CG).Patients with moderate pain were given 100 mg qd of a sustainably released tablet of tramadol hydrochloride;patientswithseverepainweregiven4.2mg q3d of the fentanyl transdermal system.The ashi points Ganshu(BL 18),Danshu(BL 19) and Qimen(LR 14) were chosen for the acupoint application intervention.CG patients were given a sham patch and TG patients were given a Dingqi analgesic patch.A visual analogue scale(VAS) was used before treatment and after 1,3,6,9 and 12 days of treatment.The Karnofsky score was measured before treatment and after 12 days of treatment.Any main adverse reactions(e.g.nausea,constipation,dizziness and headache) were recorded after 6 and 12 days of treatment.Any skin side effects(i.e.skin irritation and allergic reactions) were recorded.RESULTS:The VAS in TG was significantly lower than that in CG after 3,6,9 and 12 days of treatment(P<0.05).There was no significant difference in the Karnofsky score before treatment and after 12 days of treatment between CG and TG.There were also no significant differences in the main adverse reactions or skin side effects after 6 and 12 days of treatment between CG andTG(P>0.05).CONCLUSION:The Dingqi analgesic patch can enhance the analgesic effect of tramadol and fentanyl. | Changjun Wang Wei Tan Xuhui Huang Tingting Fu Juze Lin Junmin Bu Guojian Wei Yu Du | 2013 | Journal of Traditional Chinese Medicine2013，33，2： | 9 |
| 7 | Laboratory Simulation of Vertical Hydrocarbon Microseepage显示文摘基于烃 microseepage 的一个概念的模型,当模仿的 caprock 和它的 overlying 阶层首先被设置模仿烃 microseepage 和它的近表面的表情的过程,一台宏大小的试验性的设备使用了水泥和石英沙的匹配的混合物。模拟实验的结果建议那模仿的 caprock,它的 overlying 阶层有某个封上的能力;烃 microseepage 被点气体来源的压力统治,并且温度起仅仅一个辅助作用;在烃 microseepage 的路径上,烃集中的分发是扇形的;由模仿的 caprock 和它的 overlying 阶层的链烷的微分吸附导致色析法的效果的出现。在模仿的 caprock 以内的不同移居模式被 i 钢瓶煤气的比率显示出到 n 钢瓶煤气。在表面土壤的烃的集中与点气体来源的压力有好通讯。这些模拟结果是重要的推进在表面地球化学探索恢复的异例的机制的学习。 | WANG Guojian CHENG Tongjin FAN Ming REN Chun CHEN Weijun | 2011 | Acta Geologica Sinica(English Edition)2011，85，1： | 7 |
| 8 | Trajectory generation of heat load test based on gauss pseudospectral method显示文摘A new trajectory generation for heat load test is proposed based on gauss pseudospectral method within limit range. Firstly,with multiple path constraints and flight task requirements taken into consideration, heat load parameters are introduced into the dynamics equations. In order to solve the problem of generating such a trajectory within limit range rapidly, the dynamics equations have been normalized by Earth related parameters. Secondly, since the gauss pseudospectral method is just employed to solve the discrete nonlinear programming problem, transformations are developed, which can relate the Lagrange multipliers of the discrete nonlinear programming problem to the costates of the continuous optimal control problem. In addtion, another approach of trajectory generation by tracking the given heat rate is also presented. Finally, simulation results with common aero vehicle(CAV-H) show that the trajectories obtained by both methods can well perform the heat load test with high stagnation heating rate and the large total aeroheating amount; meanwhile, gauss pseudospectral method is better than the compared one in the given range. Furthermore, the 3-D trajectory states and control variables, angle of attack and bank, which are generated by gauss pseudospectral method, can change smoothly. | ZHANG YuanLong LIU LuHua TANG GuoJian BAO WeiMin | 2018 | Science China(Technological Sciences)2018，61，2： | 6 |
| 9 | Effect of Ball Milling on the Defeat of Few-Layer Graphene and Properties of Copper Matrix Composites显示文摘Graphene-reinforced copper composites recently have attracted more attention, since they exhibited excellent mechanical properties and could be used widely in many fields. Few-layer graphene(FLG) and copper powder were mixed by ball milling to produce homogeneous composite powders. Then, FLG-reinforced copper composites(FLG/Cu) were fabricated by spark plasma sintering(SPS) using the composite powders with a FLG volume fraction of 2.4 vol%. The effects of the rotating speed and the time of ball milling were analyzed based on the microstructure evolution and properties of the FLG/Cu composites. Obvious strengthening effect of FLG was found for the composites, and the conductance of the composite reaches 70.4% of IACS. The yield strength of the composite produced by ball milling at a speed of 100 r/min for 4 h is 376 MPa, which is 2.5 times higher than that of copper and higher than that of copper composite enhanced by 5 vol% CNTs(360 MPa). The defects produced in FLG with the increase of rotating speed and time could reduce the mechanical and conductive properties of the composites. | Ye Cui Lidong Wang Bin Li Guojian Cao Weidong Fei | 2014 | Acta Metallurgica Sinica(English Letters)2014，27，5： | 6 |
| 10 | Efficacy of integrated Traditional Chinese Medicine and anti-retroviral therapy on immunological nonresponse in patients with human immunodeficiency virus/acquired immunodeficiency syndrome: a Meta-analysis of randomized controlled trials显示文摘OBJECTIVE:To explore the efficacy of integrating Traditional Chinese Medicine(TCM)and anti-retroviral therapy(ART),a customized combination of different classes of medications which was also called cock-tail treatment,on the immunological nonresponse(INR)in people living with human immunodeficiency virus(HIV)(PLWH).METHODS:Relevant literature in databases such as China National Knowledge Infrastructure Database(CNKI),Wanfang Digital Journal,Chinese Medical Journal Database(CMJD),Chinese Biomedical Literature Database(CBM),Pub Med,Cochrane,and Embase was reviewed by two independent investigators.Data were extracted from the studies according to the eligible criteria and analyzed using Review Manager 5.3.RESULTS:Nine randomized controlled trials(RCTs)with 1078 patients were analyzed.Our analyses showed that CD4 T cell counts in the treatment group improved compared with that in the control group[mean difference(MD)=13.51,95%confidence interval(CI):7.42-19.60,P<0.0001].There was no significant difference between the treated and control groups after 3 months(MD=25.31,95%CI:-2.78 to 53.41,P=0.08).However,after 6 and 12 months,the response of the treatment group was superior to the control group(MD=27.45,95%CI:7.09-47.81,P=0.008 and MD=27.34,95%CI:6.31–48.37,P=0.01,respectively).The clinical efficacy of the treatment group was also higher than that of the control group(RR=1.75,95%CI:1.16-2.65,P=0.007).However,CD45 RO and CD45 RA T cell counts did not differ significantly between the two groups(MD=12.37,95%CI:-6.71 to 31.45,P=0.20 and MD=5.67,95%CI:-3.00 to14.35,P=0.20,respectively).CONCLUSION:The combined treatment strategy of integrated TCM and Western Medicine promotes long-term reconstitution of the immune system and thus,is beneficial and has potential use for improving INR in PLWH.However,large-scale RCTs are required to provide evidence for optimal intervention strategies. | TAO Zhuang HUANG Xiaojie LIU Ying WANG Ru DONG Jipeng LIANG Biyan ZOU Wen GAO Guojian WANG Zhuo ZHANG Ke WU Hao ZHANG Tong WANG Jian | 2021 | Journal of Traditional Chinese Medicine2021，41，5： | 6 |
| 11 | Sliding mode decoupling control of a generic hypersonic vehicle based on parametric commands显示文摘A sliding mode decoupling attitude controller based on parametric commands is proposed for a generic hypersonic vehicle(GHV). This vehicle model has fast time variability and strong coupling, is highly nonlinear, and includes uncertain parameters. The design of the controller takes these features into account.First, for the purpose of decoupling, the inner loop of the controller is designed using the dynamic inversion(DI) method. Input/output linearization is achieved using full-state feedback to globally linearize the nonlinear dynamics of selected controlled outputs. Second, to improve the robustness of the attitude control system, the sliding mode control(SMC) method is used to design the outer loop of the controller. Although the DI and SMC methods result in decoupling and robustness, there exists serious inconsistency between the commands of the attitude angles and the commands of the first-order differential of the attitude angles. To solve this problem and achieve a trade-off between dynamic response speed and attitude-tracking precision, we propose a parametric method for calculating the commands of the first-order differential of the attitude angles. Finally,simulation studies are conducted for the trimmed cruise conditions of 33.5 km altitude and Mach 15, and the responses of the vehicle to the step commands of pitch angle, yaw angle, and rolling angle are examined. The simulation studies demonstrate that the proposed controller is robust with respect to the uncertain parameters and atmospheric disturbance and meets the performance requirements of the GHV with acceptable control inputs. | WANG Peng TANG GuoJian WU Jie | 2015 | Science China(Information Sciences)2015，58，5： | 6 |
| 12 | Tunable slow-light multi-mode photonic crystal waveguides based on the coupling of square cavities显示文摘The light transmission properties through two-dimensional photonic crystal waveguides based on coupling of square cavities are studied by the finite-difference time-domain technique.Through interlacing the adjacent cavities along the direction vertical to the waveguide,the coupling distance between the adjacent cavities is extended,and the group velocity of the guiding modes can be slowed by five-fold compared with that in vacuum.Because of the different spatial field distributions of various resonant modes,the corresponding group velocities are also different for the same CROW structure. | FENG Shuai YANG GuoJian LI YuXi CHEN Xiao WANG YiQuan WANG WenZhong | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，10： | 5 |
| 13 | Development of an Inactivated Iridovirus Vaccine Against Turbot Viral Reddish Body Syndrome显示文摘Turbot(Scophthalmus maximus L.) reddish body iridovirus(TRBIV) was propagated in turbot fin cells(TF cells) and inactivated as the TRBIV vaccine with its protection efficiency evaluated in this study.TF cells were cultured in 10% bovine calf serum(BCS)-containing MEM medium(pH7.0) at 22℃,in which TRBIV propagated to a titer as high as 105.6 TCID50 mL-1.The TRBIV was inactivated with 0.1% formalin and formulated with 0.5% aluminum hydroxide.The inactivated vaccine caused neither cytopathogenic effect(CPE) on TF cells nor pathogenic effect on turbots.After being administered with the vaccine twice via muscle injection,the turbot developed high-tittered TRBIV neutralizing antibodies in a dose-dependent manner.The vaccine protected the turbot from dying with an immunoprotection rate of 83.3% as was determined via subcutaneous vaccination in the laboratory and 90.5% via bath vaccination in turbot farms,respectively.The inactivated vaccine was very immunogenic,efficiently preventing tur-bot from death.It holds the potential of being applied in aquaculture. | FAN Tingjun HU Xiuzhong WANG Liyan GENG Xiaofen JIANG Guojian YANG Xiuxia YU Miaomiao | 2012 | Journal of Ocean University of China2012，11，1： | 5 |
| 14 | Effects of bolt profile and grout mixture on shearing behaviors of bolt-grout interface显示文摘Shearing behavior and failure mechanism of bolt-grout interface are of great significance for load transfer capacity and design of rock bolting system.In this paper,direct shear tests on bolt-grout interfaces under constant normal load(CNL) conditions were conducted to investigate the effects of bolt profile(i.e.rib spacing and rib height) and grout mixture on the bolt-grout interface in terms of mechanical behaviors and failure modes.Test results showed that the peak shear strength and the deformation capacity of the bolt-grout interface are highly dependent on the bolt profile and grout mixture,suggesting that bolt performances can be optimized,which were unfortunately ignored in the previous studies.A new interface failure mode,i.e.'sheared-crush' mode,was proposed,which was characterized by progressive crush failure of the grout asperities between steel ribs during shearing.It was shown that the interface failure mode mainly depends on the normal stress level and rib spacing,compared with the rib height and grout mixture for the range of tested parameters in this study. | Chuanqing Zhang Guojian Cui Xiangrong Chen Hui Zhou Liang Deng | 2020 | Journal of Rock Mechanics and Geotechnical Engineering2020，12，2： | 4 |
| 15 | Executive compensation in business groups: Evidence from China显示文摘This paper examines executive compensation in the subsidiaries of business groups in China. Analyzing a sample of China business groups(the so-called'Xi Zu Ji Tuan' in Chinese) from 2003 to 2012, we find convincing evidence of the use of Relative Performance Evaluation(RPE) in the executive compensation of the subsidiaries of business groups. Specifically, when the change in performance of one subsidiary is lower than that of the other subsidiaries,the change in its executive compensation is significantly lower. Further, when the business group is private and the level of marketization is high, the subsidiary's executive compensation is more likely to be influenced by the performance of the other subsidiaries. This research improves our understanding of the decision mechanisms of executive compensation in business groups and enriches the literature on executive compensation and business groups. | Guilong Cai Guojian Zheng | 2016 | China Journal of Accounting Research2016，，1： | 4 |
| 16 | Role of yttrium in glass formation of Ti-based bulk metallic glasses显示文摘Starting with Zr of two different purities, Ti-based bulk metallic glasses (BMGs) with a nominal composition of Ti40Zr25Cu12Ni3Be20 were prepared. The effect of the addition of yttrium at levels of 0.2 at.%, 0.4 at.%, 0.5 at.%, 0.6 at.%, and 1 at.% on the glass forming ability (GFA) of the alloy has been investigated by means of metallography, X-ray diffraction, and differential scanning calorimetry. Experimental data in-dicates that high impurity content dramatically reduces the glass forming ability. Microalloying with 0.5 at.% Y is effective in suppressing the crystalline phase formation and alleviating the detrimental effect of oxygen in the low-purity alloy. On the contrary, in the alloy contain-ing high-purity element, the effective yttrium addition is less than 0.4 at.%. The results indicate that the beneficial effect of the optimum dopants is mainly due to scavenging the oxygen impurity via the formation of innocuous phase. | HAO Guojian REN Fei ZHANG Yong LIN Junpin | 2009 | Rare Metals2009，28，1： | 4 |
| 17 | Artificial frozen orbit control scheme based on J_2 perturbation显示文摘Since the inclination of frozen orbit with non-rotation of the perigee that occurs due to J2 perturbation must be equal to the critical inclination, this regulation has restricted the application of frozen orbit a lot. In this paper, we propose two control strategies to eliminate the secular growth of the argument of the perigee for orbits that are not at the critical inclination. One control strategy is using transverse continuous low-thrust, and the other is using both the transverse and the radial continuous low-thrusts. Fuel optimization in the second control strategy is addressed to make sure that the fuel consumption is the minimum. Both strategies have no effect on other orbital parameters’ secular motion. It is proved that the strategy with transverse control could save more energy than the one with radial control. Simulations show that the second control strategy could save 54.6% and 86% of energy, respectively, compared with the two methods presented in the references. | WANG GongBo, MENG YunHe, ZHENG Wei & TANG GuoJian* College of Aerospace and Material Engineering, National University of Defense Technology, Changsha 410073, China | 2010 | Science China(Technological Sciences)2010，53，11： | 4 |
| 18 | From fluvial dynamics to eco-fluvial dynamics显示文摘Sediment plays a very important role in the functioning of river ecosystems.It is the basic substance for the survival of benthic animals and aquatic plants.On the other hand,the growth of biofilms and biodisturbance of benthos affect the sediment transport characteristics.With the increasing attention to protect aquatic ecosystems,the importance of habitats has become increasingly researched.The need to study the interactions among sediment,flow,riverbed deformation,and aquatic ecosystems naturally leads to the proposed discipline of eco-fluvial dynamics.In this paper,the basic concept and main research content of eco-fluvial dynamics is introduced with the Yarlung Tsangpo River as the research example.This case study is an example of an aquatic ecosystem in an ever-changing environment because of the effects of climate change.The results of analysis of eco-fluvial dynamics will provide a scientific basis for decision support for the government. | Guojian He Hongwei Fang Jianyu Wang Tao Zhang | 2019 | International Journal of Sediment Research2019，34，6： | 4 |
| 19 | Effect of H_2 Reduction Temperature on the Properties of Reduced Graphene Oxide and Copper Matrix Composites显示文摘Reduced graphene oxide(RGO) and copper composites(RGO/Cu) were successfully fabricated based on a molecular-level mixing method(MLM). The composite powders were reduced in H2 at 350, 450, and 550 °C and then consolidated by spark plasma sintering(SPS) in order to evaluate the effect of H2 reduction temperature on the properties of the composites. The results indicate that the strengths of the composite decrease with the increase of H2 reduction temperature, while the electrical conductivity reaches its maximum at 450 °C and minimum at 550 °C. Hot rolling could benefit the electrical conductivity. The yield strength of the RGO/Cu composite reduced to 337 MPa at 350 °C. The electrical conductivity of the RGO/Cu composite reduced at 450 °C after hot rolling reaches 60.26% IACS. The properties of the RGO/Cu composites can be designed by adjusting the reduction degree of RGO and by hot rolling. | Lidong Wang Ye Cui Ruiyu Li Guojian Cao Bin Li Weidong Fei | 2014 | Acta Metallurgica Sinica(English Letters)2014，27，5： | 3 |
| 20 | Nucleation behavior of bulk Ni–Cu alloy and pure Sb in High magnetic fields显示文摘 | Tie Liu Qiang Wang Feng Liu Guojian Li Jicheng He | 2011 | Journal of Crystal Growth2011，，1： | 3 |
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