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| 1 | Approximate Maximum Likelihood Algorithm for Moving Source Localization Using TDOA and FDOA Measurements显示文摘A closed-form approximate maximum likelihood(AML) algorithm for estimating the position and velocity of a moving source is proposed by utilizing the time difference of arrival(TDOA) and frequency difference of arrival(FDOA) measurements of a signal received at a number of receivers.The maximum likelihood(ML) technique is a powerful tool to solve this problem.But a direct approach that uses the ML estimator to solve the localization problem is exhaustive search in the solution space,and it is very computationally expensive,and prohibits real-time processing.On the basis of ML function,a closed-form approximate solution to the ML equations can be obtained,which can allow real-time implementation as well as global convergence.Simulation results show that the proposed estimator achieves better performance than the two-step weighted least squares(WLS) approach,which makes it possible to attain the Cramér-Rao lower bound(CRLB) at a sufficiently high noise level before the threshold effect occurs. | YU Huagang HUANG Gaoming GAO Jun WU Xinhui | 2012 | Chinese Journal of Aeronautics2012，25，4： | 28 |
| 2 | Pm21, Encoding a Typical CC-NBS-LRR Protein, Confers Broad-Spectrum Resistance to Wheat Powdery Mildew Disease显示文摘 | Huagang He Shanying Zhu Renhui Zhao Zhengning Jiang Yaoyong Ji Jian Ji Dan Qiu Hongjie Li Tongde Bie | 2018 | Molecular Plant2018，11，6： | 23 |
| 3 | Practical constrained least-square algorithm for moving source location using TDOA and FDOA measurements显示文摘By utilizing the time difference of arrival (TDOA) and frequency difference of arrival (FDOA) measurements of signals received at a number of receivers, a constrained least-square (CLS) algorithm for estimating the position and velocity of a moving source is proposed. By utilizing the Lagrange multipliers technique, the known relation between the intermediate variables and the source location coordinates could be exploited to constrain the solution. And without requiring apriori knowledge of TDOA and FDOA measurement noises, the proposed algorithm can satisfy the demand of practical applications. Additionally, on basis of convolute and polynomial rooting operations, the Lagrange multipliers can be obtained efficiently and robustly allowing real-time implementation and global convergence. Simulation results show that the proposed estimator achieves remarkably better performance than the two-step weighted least square (WLS) approach especially for higher measurement noise level. | Huagang Yu Gaoming Huang Jun Gao Bo Yan | 2012 | Journal of Systems Engineering and Electronics2012，23，4： | 20 |
| 4 | Design of Energy-efficient Hierarchical Scheduling for Integrated Modular Avionics Systems显示文摘最近,介绍资源分区的概念的综合模块化的电子设备(IMA ) 建筑学作为传统的联合建筑学的一种选择变得流行。这研究调查设计为 IMA 系统的层次安排的问题。建议调度程序模型启用强壮的时间的划分,以便多重努力即时的应用程序能容易集成于一个单处理机平台。这份报纸在即时条件下面在分区周期,分区能力和 schedulability 之中导出数学关系,然后为优化分区参数建议一个算法。有任意的截止时间的实时任务为概论被考虑。为了推进,改进基本算法并且在飞机为嵌入的系统减少精力消费,一条电源优化途径被利用松时间也建议。试验性的结果证明设计系统能在至少 14% 保证努力即时的要求和还原剂得到电源消费。 | ZHOU Tianran XIONG Huagang | 2012 | Chinese Journal of Aeronautics2012，25，1： | 13 |
| 5 | Hybrid laser precision engineering of transparent hard materials:challenges,solutions and applications显示文摘Laser has been demonstrated to be a mature and versatile tool that presents great flexibility and applicability for the precision engineering of a wide range of materials over other established micromachining techniques.Past decades have witnessed its rapid development and extensive applications ranging from scientific researches to industrial manufacturing.Transparent hard materials remain several major technical challenges for conventional laser processing techniques due to their high hardness,great brittleness,and low optical absorption.A variety of hybrid laser processing technologies,such as laser-induced plasma-assisted ablation,laser-induced backside wet etching,and etching assisted laser micromachining,have been developed to overcome these barriers by introducing additional medium assistance or combining different process steps.This article reviews the basic principles and characteristics of these hybrid technologies.How these technologies are used to precisely process transparent hard materials and their recent advancements are introduced.These hybrid technologies show remarkable benefits in terms of efficiency,accuracy,and quality for the fabrication of microstructures and functional devices on the surface of or inside the transparent hard substrates,thus enabling widespread applications in the fields of microelectronics,bio-medicine,photonics,and microfluidics.A summary and outlook of the hybrid laser technologies are also highlighted. | Huagang Liu Wenxiong Lin Minghui Hong | 2021 | Light(Science & Applications)2021，10，9： | 9 |
| 6 | Hierarchical resource allocation for integrated modular avionics systems显示文摘Recently the integrated modular avionics(IMA) architecture which introduces the concept of resource partitioning becomes popular as an alternative to the traditional federated architecture.A novel hierarchical approach is proposed to solve the resource allocation problem for IMA systems in distributed environments.Firstly,the worst case response time of tasks with arbitrary deadlines is analyzed for the two-level scheduler.Then,the hierarchical resource allocation approach is presented in two levels.At the platform level,a task assignment algorithm based on genetic simulated annealing(GSA) is proposed to assign a set of pre-defined tasks to different processing nodes in the form of task groups,so that resources can be allocated as partitions and mapped to task groups.While yielding to all the resource constraints,the algorithm tries to find an optimal task assignment with minimized communication costs and balanced work load.At the node level,partition parameters are optimized,so that the computational resource can be allocated further.An example is shown to illustrate the hierarchal resource allocation approach and manifest the validity.Simulation results comparing the performance of the proposed GSA with that of traditional genetic algorithms are presented in the context of task assignment in IMA systems. | Tianran Zhou Huagang Xiong Zhen Zhang | 2011 | Journal of Systems Engineering and Electronics2011，22，5： | 7 |
| 7 | Composition and solution properties of fluorinated block copolymers and their surface structures in the solid state显示文摘A series of diblock copolymers composed of methyl methacrylate and 2-perfluorooctylethyl methacry-late(PMMA144-b-PFMAn) with various PFMA block lengths were prepared by atom transfer radical po-lymerization(ATRP).The surface structures and properties of these polymers in the solid state and in solution were investigated using contact angle measurement,X-ray photoelectron spectroscopy(XPS),sum frequency generation(SFG) vibrational spectroscopy,surface tension and dynamic laser light scattering(DLS).It was found that with increasing PFMA block length,water and oil repellency de-creased,the ratio of F/C increased with increasing film depth,and the degree of ordered packing of the perfluoroalkyl side chains at the surface decreased.When the number of PFMA block units reached 10,PMMA segments were detected at the copolymer surface,which was attributed to the PFMA block length affecting molecular aggregation structure of the copolymer in the solution and the interfacial structure at the air/liquid interface,which in turn affects surface structure formation during solution solidification.The results suggest that copolymer solution properties play an important role in struc-ture formation on the solid surface. | NI HuaGang XUE DongWu WANG XiaoFang ZHANG Wei WANG XinPing SHEN ZhiQuan | 2009 | Science China Chemistry2009，52，2： | 6 |
| 8 | DOA estimation for attitude determination on communication satellites显示文摘In order to determine an appropriate attitude of three-axis stabilized communication satellites, this paper describes a novel attitude determination method using direction of arrival(DOA) estimation of a ground signal source. It differs from optical measurement, magnetic field measurement, inertial measurement, and global positioning system(GPS) attitude determination.The proposed method is characterized by taking the ground signal source as the attitude reference and acquiring attitude information from DOA estimation. Firstly, an attitude measurement equation with DOA estimation is derived in detail. Then, the error of the measurement equation is analyzed. Finally, an attitude determination algorithm is presented using a dynamic model, the attitude measurement equation, and measurement errors. A developing low Earth orbit(LEO)satellite which tests mobile communication technology with smart antennas can be stabilized in three axes by corporately using a magnetometer, reaction wheels, and three-axis magnetorquer rods. Based on the communication satellite, simulation results demonstrate the effectiveness of the method. The method could be a backup of attitude determination to prevent a system failure on the satellite. Its precision depends on the number of snapshots and the input signal-to-noise ratio(SNR) with DOA estimation. | Yang Bin He Feng Jin Jin Xiong Huagang Xu Guanghan | 2014 | Chinese Journal of Aeronautics2014，27，3： | 6 |
| 9 | Effects of Yulangsan polysaccharide on monoamine neurotransmitters, adenylate cyclase activity and brain-derived neurotrophic factor expression in a mouse model of depression induced by unpredictable chronic mild stress显示文摘The present study established a mouse model of depression induced by unpredictable chronic mild stress. The model mice were treated with Yulangsan polysaccharide (YLSPS; 150, 300 and 600 mg/kg) for 21 days, and compared with fluoxetine-treated and normal control groups. Enzyme-linked immunosorbent assay, radioimmunity and immunohistochemical staining showed that following treatment with YLSPS (300 and 600 mg/kg), monoamine neurotransmitter levels, prefrontal cortex adenylate cyclase activity and hippocampal brain-derived neurotrophic factor expression were significantly elevated, and depression-like behaviors were improved. Open-field and novelty-suppressed feeding tests showed that mouse activity levels were increased and feeding latency was shortened following treatment. Our results indicate that YLSPS inhibits depression by upregulating monoamine neurotransmitters, prefrontal cortex adenylate cyclase activity and hippocampal brain-derived neurotrophic factor expression. | Shuang Liang Renbin Huang Xing Lin Jianchun Huang ZhongshiHuang Huagang Liu | 2012 | Neural Regeneration Research2012，7，3： | 4 |
| 10 | Reliability Analysis of Aircraft Condition Monitoring Network Using an Enhanced BDD Algorithm显示文摘The aircraft condition monitoring network is responsible for collecting the status of each component in aircraft. The reliability of this network has a significant effect on safety of the aircraft. The aircraft condition monitoring network works in a real-time manner that all the data should be transmitted within the deadline to ensure that the control center makes proper decision in time. Only the connectedness between the source node and destination cannot guarantee the data to be transmitted in time. In this paper, we take the time deadline into account and build the task-based reliability model. The binary decision diagram (BDD), which has the merit of efficiency in computing and storage space, is introduced when calculating the reliability of the network and addressing the essential variable. A case is analyzed using the algorithm proposed in this paper. The experimental results show that our method is efficient and proper for the reliability analysis of the real-time network. | ZHAO Changxiao CHEN Yao WANG Hailiang XIONG Huagang | 2012 | Chinese Journal of Aeronautics2012，25，6： | 4 |
| 11 | Heavy metal phytoextraction by Sedum alfredii is affected by continual clipping and phosphorus fertilization amendment显示文摘Improving the efficacy of phytoextraction is critical for its successful application in metal contaminated soils. Mineral nutrition affects plant growth and metal absorption and subsequently the accumulation of heavy metal through hyper-accumulator plants. This study assessed the effects of di-hydrogen phosphates (KH2PO4, Ca(H2PO4)2, NaH2PO4 and NH4H2PO4) application at three levels (22, 88 and 352 mg P/kg soil) on Sedum alfredii growth and metal uptake by three consecutive harvests on aged and Zn/Cd combined contaminated paddy soil. The addition of phosphates (P) significantly increased the amount of Zn taken up by S. alfredii due to increased shoot Zn concentration and dry matter yield (DMY) (P < 0.05). The highest phytoextraction of Zn and Cd was observed in KH2PO4 and NH4H2PO4 treatment at 352 mg P/kg soil. The amount of Zn removed by phytoextraction increased in the order of 1st clipping < 2nd clipping < 3rd clipping, and for Cd extraction the order was 2nd clipping < 1st clipping < 3rd clipping. These results indicate that the application of P fertilizers coupled with multiple cuttings can enhance the removal of Zn and Cd from contaminated soils by S. alfredii, thus shortening the time needed for accomplishing remediation goals. | Huagang Huang Tingqiang Li D.K.Gupta Zhenli He Xiao-e Yang Bingnan Ni Mao Li | 2012 | Journal of Environmental Sciences2012，24，3： | 4 |
| 12 | Electromagnetic characteristics of carbon nanotube film materials显示文摘Carbon nanotube(CNT) possesses remarkable electrical conductivity, which shows great potential for the application as electromagnetic shielding material.This paper aims to characterize the electromagnetic parameters of a high CNT loading film by using waveguide method.The effects of layer number of CNT laminate, CNT alignment and resin impregnation on the electromagnetic characteristics were analyzed.It is shown that CNT film exhibits anisotropic electromagnetic characteristic.Pristine CNT film shows higher real part of complex permittivity, conductivity and shielding effectiveness when the polarized direction of incident wave is perpendicular to the winding direction of CNT film.For the CNT film laminates, complex permittivity increases with increasing layer number, and correspondingly, shielding effectiveness decreases.The five-layer CNT film shows extraordinary shielding performance with shielding effectiveness ranging from 67 d B to78 d B in X-band.Stretching process induces the alignment of CNTs.When aligned direction of CNTs is parallel to the electric field, CNT film shows negative permittivity and higher conductivity.Moreover, resin impregnation into CNT film leads to the decrease of conductivity and shielding effectiveness.This research will contribute to the structural design for the application of CNT film as electromagnetic shielding materials. | Zhang Wei Xiong Huagang Wang Shaokai Li Min Gu Yizhuo | 2015 | Chinese Journal of Aeronautics2015，28，4： | 4 |
| 13 | Validation of spectrum method for improving efficiency of continuous-wave & Q-switched Tm-doped yttrium aluminum garnet laser显示文摘Tm^(3+)-doped 2-μm lasers benefit many applications such as atmospheric sensing,medical treatment,and spectroscopy[1-3].Therefore,in the past two decades,both continuous-wave(CW)and pulse operations have | HaiZhou Huang Pan Gao HuaGang Liu Jian-Hong Huang Juan Wang KaiMing Ruan Wen Weng Hui Zheng ZiXiong Lin ShuTao Dai Jing Deng WenXiong Lin | 2018 | Science China(Physics,Mechanics & Astronomy)2018，61，3： | 2 |
| 14 | Scheduling Rate-Constrained Flows with Dynamic Programming Priority in Time-Triggered Ethernet显示文摘Time-triggered(TT), Rate-constrained(RC) and Best-effort(BE) traffics are included in Timetriggered ethernet(TTEthernet). For RC messages transmission is affected by TT messages, traditional scheduling policy cannot be well applied in TTEthernet. Dynamic programming priority(DPP) algorithm combines priority policy and dynamic programming algorithm for scheduling RC flows. The time slice for RC flows transmission is got by SMT solver YICES; RC flows are classified to different groups according to the priorities; Higher priority packets in one time slice are scheduled using First input first output(FIFO) policy and lower priority packets are scheduled by Dynamic programming policy. DPP policy guarantees different real-time requirements of heterogeneous RC flows, and make the best of time slice resource in aviation industries. The upper bound End-End of three methods and algorithm feasibility is analyzed. Simulation in aviation shows that DPP policy can obtain better real-time performance than other scheduling algorithms. | ZHANG Yingjing HE Feng LU Guangshan XIONG Huagang | 2017 | Chinese Journal of Electronics2017，26，4： | 2 |
| 15 | Effect of block length on the self-assembly of end-capping perfluoroalkyl moieties on the polymer surface显示文摘Most research on copolymers with fluorinated monomers has focused on the relationship between fluorinated monomer content and the corresponding surface structure. However,the influence of the non-fluorinated block on the surface structure of the copolymer film is unknown. Various molecular weight poly(butyl methacrylates) (PBMA) end-capped with 2-perfluorooctylethyl methacrylate (FMA) units (PBMA-ec-FMA) have been synthesized by atom transfer radical polymerization (ATRP). The effect of the PBMA block length on the surface structure and properties of the polymers both in the solid state and in solution was investigated using various techniques. X-ray photoelectron spectroscopy (XPS),sum frequency generation (SFG) vibrational spectroscopy and X-ray diffraction (XRD) analyses indicated that longer PBMA blocks enhanced both the enrichment of the fluorinated moieties and the order of the packing orientation of the perfluoroalkyl side chains on the surface. This enhancement was attributed mainly to the molecular aggregate structure of the end-capped polymers with long PBMA blocks in the solution and to the interfacial structure at the air/liquid interface,which favors the -(CF2)7CF3 moieties self-assembling on the polymer surface during film formation. This observation suggests that the polyacrylate block structure in fluorinated diblock copolymers,in addition to the fluorinated monomer content,plays an important role in structure formation on the solid surface. | YANG JuPing ZHAO QiDi ZHOU Bin NI HuaGang WANG XinPing SHEN ZhiQuan | 2009 | Science China Chemistry2009，52，12： | 2 |
| 16 | Multilayer YAG/Re:YAG/YAG laser ceramic prepared by tape casting and vacuum sintering method显示文摘 | Fei Tang Yongge Cao Jiquan Huang Wang Guo Huagang Liu Qiufeng Huang Wenchao Wang | 2012 | Journal of the European Ceramic Society2012，，16： | 1 |
| 17 | Relay selection in cooperative communication systems over continuous time-varying fading channel显示文摘In this paper, we study relay selection under outdated channel state information(CSI) in a decode-and-forward(DF) cooperative system. Unlike previous researches on cooperative communication under outdated CSI, we consider that the channel varies continuously over time, i.e., the channel not only changes between relay selection and data transmission but also changes during data transmission. Thus the level of accuracy of the CSI used in relay selection degrades with data transmission. We first evaluate the packet error rate(PER) of the cooperative system under continuous time-varying fading channel, and find that the PER performance deteriorates more seriously under continuous time-varying fading channel than when the channel is assumed to be constant during data transmission. Then, we propose a repeated relay selection(RRS) strategy to improve the PER performance, in which the forwarded data is divided into multiple segments and relay is reselected before the transmission of each segment based on the updated CSI. Finally, we propose a combined relay selection(CRS) strategy which takes advantage of three different relay selection strategies to further mitigate the impact of outdated CSI. | Geng Ke Gao Qiang Fei Li Xiong Huagang | 2017 | Chinese Journal of Aeronautics2017，30，1： | 1 |
| 18 | FFT based long-code acquisition algorithm suitable for FPGA implementation显示文摘 | Liu Suxiao Feng Wenquan Xiong Huagang | 2011 | IEEE Conference Publications2011，，： | 1 |
| 19 | Controlled release of nerve growth factor and basic fibroblast growth factor combined with small-gap anastomosis enhances sciatic nerve regeneration显示文摘Objectives: Nerve regeneration after peripheral nerve injury is a slow process with a limited degree of functional recovery, resulting ina high disability rate. Thus, accelerating the rate of nerve regeneration and improving the degree of nerve repair is a clinical challenge. This study aimed to investigate the role of growth factor gel combined with small‐gap nerve anastomosis in the regeneration of sciatic nerve injury in rats. This was achieved by injecting nerve growth factor(NGF) and basic fibroblast growth factor(bF GF) gel into a silicon chamber that bridged the transection of the nerve. Methods: In 27 randomly chosen Sprague Dawley rats, a sharp blade was used to transect the right hind leg sciatic nerve. The rats were divided into 3 groups: in groups A and B, silicon tubes containing NGF and bF GF gel or saline, respectively, were used to bridge the nerve proximal and distal ends(3‐mm gap), and in group C, the nerve proximal and distal ends were directly sutured. Eight weeks after surgery, the sciatic nerve function index, neural electrophysiology, and muscle wet weight as well as histological, ultrastructural, and immunohistochemical parameters were evaluated.Results: The sciatic nerve function index, nerve conduction velocity, muscle wet weight,density of regenerated nerve fibers, and myelination in group A were better than those in group Bor C, but the sciatic nerve function index, muscle wet weight, and thickness of myelination in the 3 groups were not significantly different3(P > 0.05). There were no significant differences innerve conduction velocitybetween groups A and B(P > 0.05),but it was higher in both groups than that of group C(P < 0.05). The regenerated nerve fiber densityin the 3 groups showed significant differences(P < 0.05). Conclusions: Small‐gap nerve anastomosis can provide a good regenerative microenvironment for rat sciatic nerve regeneration, and the combined strategy of growth factor gel with small‐gap nerve anastomosis appears to havea superior effect on nerve repair. | Xiyuan Wang Lin Chen Huancong Zuo Huagang Liu Liu Ji Shanker.Sharma.Hari Sharma.Aruna Qiang Ao | 2015 | Translational Neuroscience and Clinics2015，1，1： | 1 |
| 20 | Active thrusting and folding in the Qilian Shah, and decoupling between upper crust and mantle in north eastern Tibet显示文摘 | Tapponnier P Neyer B Avouae J P Pehzer G Gaudemer Y Guo Shunmin Xiang Hongfa Yin Kelun Chen Zhitai Cai Shuahua Dai Huagang | 1990 | Earth Planet gel Lett1990，97，34： | 1 |
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