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| 1 | A novel strong tracking cubature Kalman filter and its application in maneuvering target tracking显示文摘The fading factor exerts a significant role in the strong tracking idea. However, traditional fading factor introduction method hinders the accuracy and robustness advantages of current strong-tracking-based nonlinear filtering algorithms such as Cubature Kalman Filter(CKF) since traditional fading factor introduction method only considers the first-order Taylor expansion. To this end, a new fading factor idea is suggested and introduced into the strong tracking CKF method.The new fading factor introduction method expanded the number of fading factors from one to two with reselected introduction positions. The relationship between the two fading factors as well as the general calculation method can be derived based on Taylor expansion. Obvious superiority of the newly suggested fading factor introduction method is demonstrated according to different nonlinearity of the measurement function. Equivalent calculation method can also be established while applied to CKF. Theoretical analysis shows that the strong tracking CKF can extract the thirdorder term information from the residual and thus realize second-order accuracy. After optimizing the strong tracking algorithm process, a Fast Strong Tracking CKF(FSTCKF) is finally established. Two simulation examples show that the novel FSTCKF improves the robustness of traditional CKF while minimizing the algorithm time complexity under various conditions. | An ZHANG Shuida BAO Fei GAO Wenhao BI | 2019 | Chinese Journal of Aeronautics2019，32，11： | 22 |
| 2 | Rectangle expansion A* pathfinding for grid maps显示文摘Search speed, quality of resulting paths and the cost of pre-processing are the principle evaluation metrics of a pathfinding algorithm. In this paper, a new algorithm for grid-based maps,rectangle expansion A*(REA*), is presented that improves the performance of A*significantly.REA*explores maps in units of unblocked rectangles. All unnecessary points inside the rectangles are pruned and boundaries of the rectangles(instead of individual points within those boundaries)are used as search nodes. This makes the algorithm plot fewer points and have a much shorter open list than A*. REA*returns jump and grid-optimal path points, but since the line of sight between jump points is protected by the unblocked rectangles, the resulting path of REA*is usually better than grid-optimal. The algorithm is entirely online and requires no offline pre-processing. Experimental results for typical benchmark problem sets show that REA*can speed up a highly optimized A*by an order of magnitude and more while preserving completeness and optimality. This new algorithm is competitive with other highly successful variants of A*. | Zhang An Li Chong Bi Wenhao | 2016 | Chinese Journal of Aeronautics2016，29，5： | 10 |
| 3 | Combination method of conflict evidences based on evidence similarity显示文摘Aiming at the problem that the traditional DempsterShafer(D-S) evidence theory cannot deal with conflicted evidences effectively and correctly, this paper points out that the key issue of this problem is to measure the degree of conflict between evidences correctly after analyzing various improved methods. The existing evidence conflict measure methods are analyzed, and a new evidence conflict measure method called evidence similarity measure based on the Tanimoto measure is proposed, while a new evidence combination method is proposed on the basis of evidence similarity measure. Firstly, the conflict degrees between evidences are obtained through the evidence similarity measure. Then the evidence sources are modified based on the credibility of different evidences and the weights of conflicted parts of evidences on different focal elements are determined. Finally, the fusion result is obtained by this method. Numerical examples show that the proposed method can effectively fuse evidences when evidences are consistent or highly conflicted, and it has a fast convergence speed, a high degree of accuracy and good adaptability. | Wenhao Bi An Zhang Yuan Yuan | 2017 | Journal of Systems Engineering and Electronics2017，28，3： | 8 |
| 4 | Low-cost adaptive square-root cubature Kalman filter forsystems with process model uncertainty显示文摘A novel low-cost adaptive square-root cubature Kalman filter(LCASCKF) is proposed to enhance the robustness of process models while only increasing the computational load slightly.It is well-known that the Kalman filter cannot handle uncertainties in a process model, such as initial state estimation errors, parameter mismatch and abrupt state changes. These uncertainties severely affect filter performance and may even provoke divergence. A strong tracking filter(STF), which utilizes a suboptimal fading factor, is an adaptive approach that is commonly adopted to solve this problem. However, if the strong tracking SCKF(STSCKF)uses the same method as the extended Kalman filter(EKF) to introduce the suboptimal fading factor, it greatly increases the computational load. To avoid this problem, a low-cost introductory method is proposed and a hypothesis testing theory is applied to detect uncertainties. The computational load analysis is performed by counting the total number of floating-point operations and it is found that the computational load of LCASCKF is close to that of SCKF. Experimental results prove that the LCASCKF performs as well as STSCKF, while the increase in computational load is much lower than STSCKF. | an zhang shuida bao wenhao bi yuan yuan | 2016 | Journal of Systems Engineering and Electronics2016，27，5： | 6 |
| 5 | Influence of Sr on microstructure and mechanical properties of ZL114 cast alloy显示文摘In the present work, the effects of trace element Sr on the microstructure, tensile properties, fractography and morphology of the eutectic Si of ZL114A (Al-7Si) cast alloy were investigated. The cast ZL114A aluminum alloy was prepared using a metal mold, and then heat treated with the T6 technique. The test results of mechanical properties show that modification element Sr can improve significantly the ultimate tensile strength, elongation and hardness of the ZL114A-T6 aluminum alloy. By adding 0.04%Sr, the values of the tensile strength Rm, elongation A and hardness HB increase from 230 MPa, 1% and 65 to the maximum of 305 MPa, 8%, and 100, respectively. SEM analysis indicates that the near tensile fracture surface on longitudinal section of the ZL114A-T6 alloy reveals a transgranular fracture mode without Sr modification, while the tensile fracture is an intergranular fracture mode after Sr modification. The morphology of the eutectic Si phase is changed from acicular to fine fibrous. | Dong Xugang Zhou Jie Jia Yaojun Liu Bin Lei Zhenzhen Wang Wenhao Bi Huan | 2011 | China Foundry2011，8，4： | 2 |
| 6 | Human-machine function allocation method for aircraft cockpit based on interval 2-tuple linguistic information显示文摘Appropriate human-machine function allocation benefits the complement between pilots and automation, and makes the whole system more effective and reliable. Thus, the humanmachine function allocation method for aircraft cockpit based on interval 2-tuple linguistic information is proposed. The uncertain expanded weighted arithmetic averaging(UEWAA) operator and uncertain linguistic hybrid aggregation(ULHA) operator are extended into the interval 2-tuple linguistic environment based on uncertain linguistic multiple attribute decision making(ULMADM).And some new aggregation operators are developed, including the interval 2-tuple weighted average aggregation(IT-WAA) operator and the interval 2-tuple weighted hybrid aggregation(IT-WHA)operator. Uniformization of the multiple-granularity linguistic evaluation information is introduced to solve the problem of ULMADM not being able to deal with the multiple-granularity linguistic information from different decision-makers. Then the detailed steps of the proposed method are described. Finally, an illustrative example of the ground proximity warning system(GPWS) is provided to demonstrate the practicality, feasibility and superiority based on the comparison between the proposed method and ULMADM. | An Zhang Wenhao Bi Zhili Tang Chao Zhang | 2016 | Journal of Systems Engineering and Electronics2016，27，6： | 2 |
| 7 | Effects of postharvest sodium silicate treatment on pink rot disease and oxidative stress-antioxidative system in muskmelon fruit显示文摘 | Wenhao Li Yang Bi Yonghong Ge Yongcai Li Junjie Wang Yi Wang | 2012 | European Food Research and Technology2012，，1： | 1 |
| 8 | Exosomes in bladder cancer:novel biomarkers and targets显示文摘Exosomes are nanometer-sized vesicles that contain various types of biologically active components,including proteins,nucleic acids,carbohydrates,and lipids,which vary with the type and physiological state of the cell.In recent years,several studies have showed that exosomes can provide new non-invasive diagnostic and prognostic biomarkers in patients affected by cancers,including bladder cancer(BC),and the lipid bilayer membrane structure makes exosomes as promising delivery vehicles for therapeutic applications.Exosomes have the characteristics of high abundance,high stability,tissue specificity,and wide distribution in body fluids,and are secreted as various types by cells in different states,thereby possessing great potential as biomarkers for BC.Herein,we briefly summarize the functions and roles of exosomes in the occurrence and development of BC and the current progress of research on exosomes in BC,while focusing on potential clinical applications of the diagnosis,treatment,and prognosis of BC. | Hao GENG Qingchen ZHOU Wenhao GUO Ling LU Liangkuan BI Yi WANG Jie MIN Dexin YU Zhaofeng LIANG | 2021 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2021，22，5： | 0 |
| 9 | Genetic Architecture of Childhood Kidney and Urological Diseases in China显示文摘Kidney disease is manifested in a wide variety of phenotypes,many of which have an important hereditary component.To delineate the genotypic and phenotypic spectrum of pediatric nephropathy,a multicenter registration system is being imple-mented based on the Chinese Children Genetic Kidney Disease Database(CCGKDD).In this study,all the patients with kidney and urological diseases were recruited from 2014 to 2020.Genetic analysis was conducted using exome sequencing for families with multiple affected individuals with nephropathy or clinical suspicion of a genetic kidney disease owing to early-onset or extrarenal features.The genetic diagnosis was confirmed in 883 of 2256(39.1%)patients from 23 provinces in China.Phenotypic profiles showed that the primary diagnosis included steroid-resistant nephrotic syndrome(SRNS,23.5%),glomerulonephritis(GN,32.2%),congenital anomalies of the kidney and urinary tract(CAKUT,21.2%),cystic renal disease(3.9%),renal calcinosis/stone(3.6%),tubulopathy(9.7%),and chronic kidney disease of unknown etiology(CKDu,5.8%).The pathogenic variants of 105 monogenetic disorders were identified.Ten distinct genomic disorders were identified as pathogenic copy number variants(CNVs)in 11 patients.The diagnostic yield differed by subgroups,and was highest in those with cystic renal disease(66.3%),followed by tubulopathy(58.4%),GN(57.7%),CKDu(43.5%),SRNS(29.2%),renal calcinosis/stone(29.3%)and CAKUT(8.6%).Reverse phenotyping permitted correct identification in 40 cases with clinical reassessment and unexpected genetic conditions.We present the results of the largest cohort of children with kidney disease in China where diagnostic exome sequencing was performed.Our data demonstrate the utility of family-based exome sequencing,and indicate that the combined analysis of genotype and phenotype based on the national patient registry is pivotal to the genetic diagnosis of kidney disease. | Ye Fang Hua Shi Tianchao Xiang Jiaojiao Liu Jialu Liu Xiaoshan Tang Xiaoyan Fang Jing Chen Yihui Zhai Qian Shen Guomin Li Li Sun Yunli Bi Xiang Wang Yanyan Qian Bingbing Wu Huijun Wang Wenhao Zhou Duan Ma Jianhua Mao Xiaoyun Jiang Shuzhen Sun Ying Shen Xiaorong Liu Aihua Zhang Xiaowen Wang Wenyan Huang Qiu Li Mo Wang Xiaojie Gao Yubin Wu Fang Deng Ruifeng Zhang Cuihua Liu Li Yu Jieqiu Zhuang Qing Sun Xiqiang Dang Haitao Bai Ying Zhu Siguang Lu Bili Zhang Xiaoshan Shao Xuemei Liu Mei Han Lijun Zhao Yuling Liu Jian Gao Ying Bao Dongfeng Zhang Qingshan Ma Liping Zhao Zhengkun Xia Biao Lu Yulong Wang Mengzhun Zhao Jianjiang Zhang Shan Jian Guohua He Huifeng Zhang Bo Zhao Xiaohua LI Feiyan Wang Yufeng Li Hongtao Zhu Xinhui Luo Jinghai Li Jia Rao Hong Xu | 2021 | Phenomics2021，1，3： | 0 |
| 10 | Trigger control characteristics of fuze-recoil simulation system based on electromagnetic launcher显示文摘Fuze is the information processing and control unit of the ammunition, so the quality of the fuze becomes one of the most important aspects of ammunition detection. Since using recoil force is a common method to the arm fuze, its dynamic simulation test has always been the focus of the fuze test research. A new fuze recoil environmental simulation method is proposed based on the electromagnetic launcher. Then the trigger control characteristics of the fuze recoil simulation system and the influence of the trigger position on the recoil force are studied. The results of the study show that although the pulse width of the armature force curve can be changed by adjusting the trigger position, due to the limit of the range, there also exists the contradiction that the electromagnetic pulse width gets narrow with the increase of electromagnetic force peak. Thus, it cannot meet the requirements of the fuze launch recoil simulation. In order to make the recoil force close to the actual environment, the multi-stage trigger control characteristics are analyzed, and the influence of trigger position on recoil environmental force characteristics is studied. Then a fuze launch recoil environmental simulation platform is established and continuous electromagnetic force is achieved by using the trigger strategy.Finally, the experiment is performed to simulate the fuze launch recoil environment and show the feasibility and effectiveness of the proposed theoretical analysis. The major research work of this paper includes studying the composition and basic principle of the simulation system, establishing a launch model to analyze the single-stage and multi-stage coil fuze launch recoil characteristics,designing the test device to verify the correctness and validity of the research. This paper draws the conclusions that the feasibility of the fuze launch environmental simulation based on the electromagnetic launcher is verified, the trigger position has a great influence on force peak continuity, the problems of low maximum overload peak and short peak duration in the multi-stage coil fuze launch environmental simulation can be effectively solved through adjusting the trigger position, the system has creative and extensive application prospects. | Wenhao Wang Shihua Bi Hongjun Xiang Chao Zhan Xichao Yuan | 2017 | Journal of Systems Engineering and Electronics2017，28，3： | 0 |
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