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| 1 | Advances and Trends on Tube Bending Forming Technologies显示文摘作为有庞大的数量和差异的一个种关键部件,弄弯的试管部分从材料和结构方面为无足轻重的人和高张力产品满足增加的需要。弄弯的试管广泛地在象航空,太空,造船,汽车,精力和护理那样的许多高端工业被使用了。弯曲的试管成为了为小产品形成生产技术的钥匙之一。经由把特征和多重缺点弄弯的分析,在试管弯曲探索普通问题上的进展在穹隆之内面关于起皱的不稳定性被总结,墙变瘦(裂开) 在拱背, springback 现象,剖面图变丑,形成的限制和过程 / 工具设计 / 优化。一些当前发达的弯曲技术以他们的优点和限制被考察。最后,鉴于高效的建筑群的迫切要求,在航空与 difficult-to-deform 和小材料把试管部件弄弯,太空域,发展趋势和相应挑战为认识到把变丑弄弯的精确、高效率的试管被介绍。 | YANG He LI Heng ZHANG Zhiyong ZHAN Mei LIU Jing LI Guanjun | 2012 | Chinese Journal of Aeronautics2012，25，1： | 86 |
| 2 | TALEN or Cas9-Rapid,Efficient and Specific Choices for Genome Modifications显示文摘Precise modifications of complex genomes at the single nucleotide level have been one of the big goals for scientists working in basic and applied genetics,including biotechnology,drug development,gene therapy and synthetic biology.However,the relevant techniques for making these manipulations in model organisms and human cells have been lagging behind the rapid high throughput studies in the post-genomic era with a bottleneck of low efficiency,time consuming and laborious manipulation,and off-targeting problems.Recent discoveries of TALEs(transcription activator-like effectors) coding system and CRISPR(clusters of regularly interspaced short palindromic repeats) immune system in bacteria have enabled the development of customized TALENs(transcription activator-like effector nucleases) and CRISPR/Cas9 to rapidly edit genomic DNA in a variety of cell types,including human cells,and different model organisms at a very high efficiency and specificity.In this review,we first briefly summarize the development and applications of TALENs and CRISPR/Cas9-mediated genome editing technologies;compare the advantages and constraints of each method;particularly,discuss the expected applications of both techniques in the field of site-specific genome modification and stem cell based gene therapy;finally, propose the future directions and perspectives for readers to make the choices. | Chuanxian Wei Jiyong Liu Zhongsheng Yu Bo Zhang Guanjun Gao Renjie Jiao | 2013 | Journal of Genetics and Genomics2013，40，6： | 52 |
| 3 | GL3.3, a Novel QTL Encoding a GSK3/SHAGGY- like Kinase, Epistatically Interacts with GS3 to Produce Extra-long Grains in Rice显示文摘 | Duo Xia Nao Zhou Rongjia Liu Wenhan Dan Pingbo Li Bian Wu Junxiao Chen Lingqiang Wang Guanjun Gao Qinglu Zhang Yuqing He | 2018 | Molecular Plant2018，11，5： | 41 |
| 4 | A novel approach of testability modeling and analysis for PHM systems based on failure evolution mechanism显示文摘Prognostics and health management (PHM) significantly improves system availability and reliability, and reduces the cost of system operations. Design for testability (DFT) developed concurrently with system design is an important way to improve PHM capability. Testability modeling and analysis are the foundation of DFT. This paper proposes a novel approach of testability modeling and analysis based on failure evolution mechanisms. At the component level, the fault progression-related information of each unit under test (UUT) in a system is obtained by means of failure modes, evolution mechanisms, effects and criticality analysis (FMEMECA), and then the failure-symptom dependency can be generated. At the system level, the dynamic attributes of UUTs are assigned by using the bond graph methodology, and then the symptom-test dependency can be obtained by means of the functional flow method. Based on the failure-symptom and symptom-test dependencies, testability analysis for PHM systems can be realized. A shunt motor is used to verify the application of the approach proposed in this paper. Experimental results show that this approach is able to be applied to testability modeling and analysis for PHM systems very well, and the analysis results can provide a guide for engineers to design for testability in order to improve PHM performance. | Tan Xiaodong Qiu Jing Liu Guanjun Lv Kehong Yang Shuming Wang Chao | 2013 | Chinese Journal of Aeronautics2013，26，3： | 14 |
| 5 | Testability evaluation using prior information of multiple sources显示文摘Testability plays an important role in improving the readiness and decreasing the lifecycle cost of equipment. Testability demonstration and evaluation is of significance in measuring such testability indexes as fault detection rate(FDR) and fault isolation rate(FIR), which is useful to the producer in mastering the testability level and improving the testability design, and helpful to the consumer in making purchase decisions. Aiming at the problems with a small sample of testability demonstration test data(TDTD) such as low evaluation confidence and inaccurate result, a testability evaluation method is proposed based on the prior information of multiple sources and Bayes theory. Firstly, the types of prior information are analyzed. The maximum entropy method is applied to the prior information with the mean and interval estimate forms on the testability index to obtain the parameters of prior probability density function(PDF), and the empirical Bayesian method is used to get the parameters for the prior information with a success-fail form. Then, a parametrical data consistency check method is used to check the compatibility between all the sources of prior information and TDTD. For the prior information to pass the check, the prior credibility is calculated. A mixed prior distribution is formed based on the prior PDFs and the corresponding credibility. The Bayesian posterior distribution model is acquired with the mixed prior distribution and TDTD, based on which the point and interval estimates are calculated.Finally, examples of a flying control system are used to verify the proposed method. The results show that the proposed method is feasible and effective. | Wang Chao Qiu Jing Liu Guanjun Zhang Yong | 2014 | Chinese Journal of Aeronautics2014，27，4： | 9 |
| 6 | Underwater Positioning Based on an Artificial Lateral Line and a Generalized Regression Neural Network显示文摘 | Xiande Zheng Yong Zhang Mingjiang Ji Ying Liu Xin Lin Jing Qiu Guanjun Liu | 2018 | Journal of Bionic Engineering2018，15，5： | 8 |
| 7 | Test selection and optimization for PHM based on failure evolution mechanism model显示文摘The test selection and optimization(TSO) can improve the abilities of fault diagnosis, prognosis and health-state evaluation for prognostics and health management(PHM) systems. Traditionally, TSO mainly focuses on fault detection and isolation, but they cannot provide an effective guide for the design for testability(DFT) to improve the PHM performance level. To solve the problem, a model of TSO for PHM systems is proposed. Firstly,through integrating the characteristics of fault severity and propagation time, and analyzing the test timing and sensitivity, a testability model based on failure evolution mechanism model(FEMM) for PHM systems is built up. This model describes the fault evolutiontest dependency using the fault-symptom parameter matrix and symptom parameter-test matrix. Secondly, a novel method of inherent testability analysis for PHM systems is developed based on the above information. Having completed the analysis, a TSO model, whose objective is to maximize fault trackability and minimize the test cost, is proposed through inherent testability analysis results, and an adaptive simulated annealing genetic algorithm(ASAGA) is introduced to solve the TSO problem. Finally, a case of a centrifugal pump system is used to verify the feasibility and effectiveness of the proposed models and methods. The results show that the proposed technology is important for PHM systems to select and optimize the test set in order to improve their performance level. | Jing Qiu Xiaodong Tan Guanjun Liu Kehong L | 2013 | Journal of Systems Engineering and Electronics2013，24，5： | 7 |
| 8 | Environmental stress level evaluation approach based on physical model and interval grey association degree显示文摘Associating environmental stresses (ESs) with built-in test (BIT) output is an important means to help diagnose intermittent faults (IFs). Aiming at low efficiency in association of traditional time stress measurement device (TSMD), an association model is built. Thereafter, a novel approach is given to evaluate the integrated environmental stress (IES) level. Firstly, the selection principle and approach of main environmental stresses (MESs) and key characteristic parameters (KCPs) are presented based on fault mode, mechanism, and ESs analysis (FMMEA). Secondly, reference stress events (RSEs) are constructed by dividing IES into three stress levels according to its impact on faults; and then the association model between integrated environmental stress event (IESE) and BIT output is built. Thirdly, an interval grey association approach to evaluate IES level is proposed due to the interval number of IES value. Consequently, the association output can be obtained as well. Finally, a case study is presented to demonstrate the proposed approach. Results show the proposed model and approach are effective and feasible. This approach can be used to guide ESs measure, record, and association. It is well suited for on-line assistant diagnosis of faults, especially IFs. | Deng Guanqian Qiu Jing Liu Guanjun Lv Kehong | 2013 | Chinese Journal of Aeronautics2013，26，2： | 7 |
| 9 | Brazing of WC–8Co cemented carbide to steel using Cu–Ni–Al alloys as filler metal: Microstructures and joint mechanical behavior显示文摘Three novel Cu–Ni–Al brazing filler alloys with Cu/Ni weight ratio of 4:1 and 2.5–10 wt% Al were developed and characterized, and the wetting of three Cu–Ni–Al alloys on WC–8 Co cemented carbide were investigated at 1190–1210?C by the sessile drop technique. Vacuum brazing of the WC–8 Co cemented carbide to SAE1045 steel using the three Cu–Ni–Al alloys as filler metal was further carried out based on the wetting test results. The interfacial interactions and joint mechanical behaviors involving microhardness, shear strength and fracture were analyzed and discussed. The experimental results show that all the three wetting systems present excellent wettability with final contact angles of less than 5?and fast spreading. An obvious degeneration layer with continuous thin strip forms in the cemented carbide adjacent to the Cu–Ni–Al/WC–8 Co interface. The variation of microhardness in the joint cross-section is closely related to the interactions(such as diffusion and solid solution) of WC–8 Co/Cu–Ni–Al/steel system. Compared with the other two brazed joints, the WC–8 Co/Cu–19 Ni–5 Al/steel brazed joint presents more reliable interlayer microstructure and mechanical property while brazing at the corresponding wetting temperatures for 5 min, and its average shear strength is over 200 MPa after further optimizing the brazing temperature and holding time. The joint shear fracture path passes along the degeneration layer, Cu–Ni–Al/WC–8 Co interface and brazing interlayer, showing a mixed ductile-brittle fracture. | Xiangzhao Zhang Guiwu Liu Junnan Tao Yajie Guo Jingjing Wang Guanjun Qiao | 2018 | Journal of Materials Science & Technology2018，34，7： | 6 |
| 10 | Sensor selection of helicopter transmission systems based on physical model and sensitivity analysis显示文摘In the helicopter transmission systems, it is important to monitor and track the tooth damage evolution using lots of sensors and detection methods. This paper develops a novel approach for sensor selection based on physical model and sensitivity analysis. Firstly, a physical model of tooth damage and mesh stiffness is built. Secondly, some effective condition indicators(CIs) are presented, and the optimal CIs set is selected by comparing their test statistics according to Mann–Kendall test. Afterwards, the selected CIs are used to generate a health indicator(HI)through sen slop estimator. Then, the sensors are selected according to the monotonic relevance and sensitivity to the damage levels. Finally, the proposed method is verified by the simulation and experimental data. The results show that the approach can provide a guide for health monitoring of helicopter transmission systems, and it is effective to reduce the test cost and improve the system's reliability. | Lyu Kehong Tan Xiaodong Liu Guanjun Zhao Chenxu | 2014 | Chinese Journal of Aeronautics2014，27，3： | 5 |
| 11 | Activation of TLR7 increases CCND3 expression via the downregulation of miR-15b in B cells of systemic lupus erythematosus显示文摘全身的豺狼座 erythematosus (SLE ) 是 B 房间 hyperreactivity 描绘的自体免疫的疾病。像使用费的受体 7 (TLR7 ) 表明小径反常地在 SLE B 房间被激活。CyclinD3 (CCND3 ) 在 B 房间增长,开发,和区别起一个重要作用。尽管以前的研究为自发的幼芽的中心的发展集中了于 TLR7 的 B 房间内在的角色,在 SLE B 房间的 CCND3 上的 TLR7 的影响仍然不是清楚的。这里,我们使用了介绍薄片的 B 房间并且发现 CCND3 与 SLE 有关并且显著地在 SLE B 房间提高了。而且,我们决定 CCND3 的表示水平更高,当 miR-15b 与正常题目相比在从 SLE 病人和 B6.MRL-Faslpr/J 豺狼座老鼠的 B 房间是显著地更低的时。而且,我们证明 TLR7 的激活戏剧性地增加了 CCND3 表示,但是显著地减少了在在 vitro 的 B 房间的 miR-15b 并且我们鉴别 CCND3 是 miR-15b 的一个直接目标。为了推进,证实我们的结果,我们由谈论地对待 C57BL/6 (B6 ) 建立了另一个豺狼座模型有为 8 个星期的 TLR-7 收缩筋 imiquimod (IMQ ) 的老鼠根据以前描述的协议。Expectedly,有 IMQ 的热门治疗显著地也增加了 CCND3 并且减少在 B6 老鼠的 B 房间的 miR-15b。一起拿,我们的结果鉴别 TLR7 的激活在 B cells; 经由 miR-15b 的 downregulation 增加了 CCND3 表示;因此,这些调查结果建议那外来的导致因素的 CCND3 表情可以在 SLE 贡献 B 房间的反常。 | Deshan Ren Fei Liu Guanjun Dong Ming You Jianjian Ji Yahong Huang Yayi Hou Hongye Fan | 2016 | Cellular & Molecular Immunology2016，13，6： | 5 |
| 12 | Testability integrated evaluation method based on testability virtual test data显示文摘Testability virtual test is a new test method for testability verification,which has the advantages such as low cost,few restrictions and large sample of test data. It can be used to make up the deficiency of testability physical test. In order to take the advantage of testability virtual test data effectively and to improve the accuracy of testability evaluation,a testability integrated evaluation method is proposed in this paper based on testability virtual test data. Considering the characteristic of testability virtual test data,the credibility analysis method for testability virtual test data is studied firstly. Then the integrated calculation method is proposed fusing the testability virtual and physical test data. Finally,certain helicopter heading and attitude system is presented to demonstrate the proposed method. The results show that the testability integrated evaluation method is feasible and effective. | Liu Guanjun Zhao Chenxu Qiu Jing Zhang Yong | 2014 | Chinese Journal of Aeronautics2014，27，1： | 4 |
| 13 | Test results judgment method based on BIT faults显示文摘Built-in-test(BIT) is responsible for equipment fault detection, so the test data correctness directly influences diagnosis results. Equipment suffers all kinds of environment stresses, such as temperature, vibration, and electromagnetic stress. As embedded testing facility, BIT also suffers from these stresses and the interferences/faults are caused, so that the test course is influenced,resulting in incredible results. Therefore it is necessary to monitor test data and judge test failures.Stress monitor and BIT self-diagnosis would redound to BIT reliability, but the existing antijamming researches are mainly safeguard design and signal process. This paper focuses on test results monitor and BIT equipment(BITE) failure judge, and a series of improved approaches is proposed. Firstly the stress influences on components are illustrated and the effects on the diagnosis results are summarized. Secondly a composite BIT program is proposed with information integration, and a stress monitor program is given. Thirdly, based on the detailed analysis of system faults and forms of BIT results, the test sequence control method is proposed. It assists BITE failure judge and reduces error probability. Finally the validation cases prove that these approaches enhance credibility. | Wang Gang Qiu Jing Liu Guanjun Lyu Kehong | 2015 | Chinese Journal of Aeronautics2015，28，6： | 4 |
| 14 | FAULT DIAGNOSIS APPROACH BASED ON HIDDEN MARKOV MODEL AND SUPPORT VECTOR MACHINE显示文摘瞄准解决这些问题在差错诊断学习机器,一条诊断途径基于隐藏的 Markov 模型被建议(唔) 并且支持向量机器(SVM ) 。唔通常描述 intra 班措施很好并且擅长处理连续动态信号。SVM 有效地表示年级之间的差别并且让完成式分类能力。这条途径在优点上被造唔并且 SVM。然后,实验在一架直升飞机的传播系统被做。与从颤动信号提取的特征上档框,这 HMM-SVM 基于诊断途径被训练并且过去常监视并且诊断 gearbox 的差错。结果证明这个方法比唔基于好、基于 SVM 与小训练样品在更高诊断的精确性诊断方法。 | LIU Guanjun LIU Xinmin QIU Jing HU Niaoqing | 2007 | Chinese Journal of Mechanical Engineering2007，20，5： | 4 |
| 15 | Sensor Optimization Selection Model Based on Testability Constraint显示文摘Sensor selection and optimization is one of the important parts in design for testability. To address the problems that the traditional sensor optimization selection model does not take the requirements of prognostics and health management especially fault prognostics for testability into account and does not consider the impacts of sensor actual attributes on fault detectability, a novel sensor optimization selection model is proposed. Firstly, a universal architecture for sensor selection and optimization is provided. Secondly, a new testability index named fault predictable rate is defined to describe fault prognostics requirements for testability. Thirdly, a sensor selection and optimization model for prognostics and health management is constructed, which takes sensor cost as objective function and the defined testability indexes as constraint conditions. Due to NP-hard property of the model, a generic algorithm is designed to obtain the optimal solution. At last, a case study is presented to demonstrate the sensor selection approach for a stable tracking servo platform. The application results and comparison analysis show the proposed model and algorithm are effective and feasible. This approach can be used to select sensors for prognostics and health management of any system. | YANG Shuming QIU Jing LIU Guanjun | 2012 | Chinese Journal of Aeronautics2012，25，2： | 4 |
| 16 | Partition-based Collaborative Tensor Factorization for POI Recommendation显示文摘The rapid development of location-based social networks(LBSNs) provides people with an opportunity of better understanding their mobility behavior which enables them to decide their next location.For example,it can help travelers to choose where to go next,or recommend salesmen the most potential places to deliver advertisements or sell products.In this paper,a method for recommending points of interest(POIs)is proposed based on a collaborative tensor factorization(CTF)technique.Firstly,a generalized objective function is constructed for collaboratively factorizing a tensor with several feature matrices.Secondly,a 3-mode tensor is used to model all users' check-in behaviors,and three feature matrices are extracted to characterize the time distribution,category distribution and POI correlation,respectively.Thirdly,each user's preference to a POI at a specific time can be estimated by using CTF.In order to further improve the recommendation accuracy,PCTF(Partitionbased CTF) is proposed to fill the missing entries of a tensor after clustering its every mode.Experiments on a real checkin database show that the proposed method can provide more accurate location recommendation. | Wenjing Luan Guanjun Liu Changjun Jiang Liang Qi | 2017 | IEEE/CAA Journal of Automatica Sinica2017，4，3： | 4 |
| 17 | Thermal deformation behavior and microstructure of nuclear austenitic stainless steel显示文摘Gleeble-1500D thermal simulation tester was employed in the hot-compression investigation of as-cast nuclear 304 austenitic stainless steel under conditions: deformation temperature 950―1200℃; deformations 30% and 50%; deformation rates 0.01 and 0.1 s?1. The results show that the flow stress decreases with temperature rise under the same strain rate and deformation, that the flow stress increases with deformation under the same temperature and strain rate, and that the flow stress increases with strain rate under the same temperature condition, i.e., work hardening becomes distinct. Materials exhibit better strength-toughness when the strain rate is 0.01 s-1, the deformation is 50%, and the temperature is 1050℃. | LIU Jie FAN GuangWei HAN PeiDe LIU JianSheng GE DongSheng QIAO GuanJun | 2009 | Science China(Technological Sciences)2009，52，8： | 4 |
| 18 | Non-dominated sorting culture differential evolution algorithm for multi-objective optimal operation of Wind-Solar-Hydro complementary power generation system显示文摘Due to the intermittency and instability of Wind-Solar energy and easy compensation of hydropower, this study proposes a Wind-Solar-Hydro power optimal scheduling model. This model is aimed at maximizing the total system power generation and the minimum ten-day joint output. To effectively optimize the multi-objective model, a new algorithm named non-dominated sorting culture differential evolution algorithm(NSCDE) is proposed. The feasibility of NSCDE was verified through several well-known benchmark problems. It was then applied to the Jinping Wind-Solar-Hydro complementary power generation system. The results demonstrate that NSCDE can provide decision makers a series of optimized scheduling schemes. | Guanjun Liu Hui Qin Rui Tian Lingyun Tang Jie Li | 2019 | Global Energy Interconnection2019，2，4： | 3 |
| 19 | A discrete event systems approach to discriminating intermittent from permanent faults显示文摘Almost all work on model-based diagnosis(MBD) potentially presumes faults are persistent and does not take intermittent faults(IFs) into account. Therefore, it is common for diagnosis systems to misjudge IFs as permanent faults(PFs), which are the major cause of the problems of false alarms, cannot duplication and no fault found in aircraft avionics. To address this problem, a new fault model which includes PFs and IFs is presented based on discrete event systems(DESs). Thereafter, an approach is given to discriminate between PFs and IFs by diagnosing the current fault. In this paper, the regulations of(PFs and IFs) fault evolution through fault and reset events along the traces of system are studied, and then label propagation function is modified to account for PFs and the dynamic behavior of IFs and diagnosability of PFs and IFs are defined. Finally, illustrative examples are presented to demonstrate the proposed approach, and the analysis results show the fault types can be discriminated within bounded delay if the system is diagnosable. | Deng Guanqian Qiu Jing Liu Guanjun Lyu Kehong | 2014 | Chinese Journal of Aeronautics2014，27，2： | 3 |
| 20 | Net-structure-based conditions to decide compatibility and weak compatibility for a class of inter-organizational workflow nets显示文摘Inter-organizational workflow nets(IWF-nets) can well model the interactions among multiple processes by sending/receiving messages. Compatibility and weak compatibility are crucial properties for IWF-nets.The latter guarantees that a system is deadlock-free and livelock-free while the former also guarantees that it has no dead tasks. Our previous work proved that the(weak) compatibility problem is PSPACE-complete for safe IWF-nets. This paper defines a class of IWF-nets in which some simple circuits are allowed. Necessary and sufficient conditions are presented to decide compatibility and weak compatibility for this class, and they are dependent on the net structures only. Algorithms are developed based on these conditions. In addition, we show that the traditional net structures like siphon cannot be easily used to decide the(weak) compatibility of IWF-nets. | LIU GuanJun JIANG ChangJun | 2015 | Science China(Information Sciences)2015，58，7： | 3 |
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