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| 1 | Vacuum Dielectric Recovery Characteristics of a Novel Current Limiting Circuit Breaker Base on Artificial Current Zero显示文摘为了保证新型强迫换流型真空直流限流断路器关断短路电流的可靠性,对该型断路器分断过程的真空介质恢复特性进行研究。设计了与断路器关断过程等效的介质恢复试验方案,通过等效试验结果和理论推演公式的拟合,得到了新型强迫换流型限流断路器真空灭弧室触头打开过程的动态介质强度恢复规律。研究结果表明:减小燃弧能量、提高触头运动速度可提高真空灭弧室介质的临界击穿电压;综合考虑燃弧时间与燃弧能量及触头开距的关系,随着燃弧时间的增加,真空灭弧室临界击穿电压先减小后增大。所得介质恢复规律可以作为新型断路器优化设计的参考依据。 | JIANG Zhuangxian ZHUANG Jinwu WANG Chen WU Jin LIU Luhui | 2012 | 中国电机工程学报2012，32，13： | 20 |
| 2 | NEW METHOD OF EXTRACTING WEAK FAILURE INFORMATION IN GEARBOX BY COMPLEX WAVELET DENOISING显示文摘Because the extract of the weak failure information is always the difficulty and focus of fault detection.Aiming for specific statistical properties of complex wavelet coefficients of gearbox vibration signals,a new signal-denoising method which uses local adaptive algorithm based on dual-tree complex wavelet transform(DT-CWT)is introduced to extract weak failure information in gear,especially to extract impulse components.By taking into account the non-Gaussian probability distribution and the statistical dependencies among wavelet coefficients of some signals, and by taking the advantage of near shift-invariance of DT-CWT,the higher signal-to-noise ratio(SNR)than common wavelet denoising methods can be obtained. Experiments of extracting periodic impulses in gearbox vibration signals indicate that the method can extract incipient fault feature and hidden information from heavy noise,and it has an excellent effect on identifying weak feature signals in gearbox vibration signals. | CHEN Zhixin XU Jinwu YANG Debin | 2008 | Chinese Journal of Mechanical Engineering2008，21，4： | 18 |
| 3 | 美国油气管道维抢修应急响应程序显示文摘美国油气管道维抢修应急响应体系完备,主要体现在由联邦、州、地方政府机构、油气管道行业、公共安全以及其他组织机构的协调运行管理。介绍了建立管道维抢修应急响应程序遵循的主要法律法规和与之相关的立法机构。基于国家事故管理系统,国土安全部建立了管道维抢修应急响应程序,为具有不同事故原因、规模、地理位置或复杂性的事故提供了体系化处理方法,并基于社区规模、地理位置或自愿组织机构等进行人员和设备配置。以阿拉斯加州管道维抢修应急响应系统为例,详细介绍了应急响应队伍和人员的配置特点,应急反应资源的配备方式、影响因素和分布情况,可为国内油气管道维抢修应急响应工作的开展提供借鉴。 | 石蕾 郝建斌 郭正虹 He Xihua Li Jinwu Feng Maoqi | 2010 | 油气储运2010，29，12： | 18 |
| 4 | Nonlinear Aeroelastic Response of High-aspect-ratio Flexible Wings显示文摘The aeroelastic analysis of high-altitude,long-endurance(HALE) aircraft that features high-aspect-ratio flexible wings needs take into account structural geometrical nonlinearities and dynamic stall.For a generic nonlinear aeroelastic system,besides the stability boundary,the characteristics of the limit-cycle oscillation(LCO) should also be accurately predicted.In order to conduct nonlinear aeroelastic analysis of high-aspect-ratio flexible wings,a first-order,state-space model is developed by combining a geometrically exact,nonlinear anisotropic beam model with nonlinear ONERA(Edlin) dynamic stall model.The present inves-tigations focus on the initiation and sustaining mechanism of the LCO and the effects of flight speed and drag on aeroelastic behaviors.Numerical results indicate that structural geometrical nonlinearities could lead to the LCO without stall occurring.As flight speed increases,dynamic stall becomes dominant and the LCO increasingly complicated.Drag could be negligible for LCO type,but should be considered to exactly predict the onset speed of flutter or LCO of high-aspect-ratio flexible wings. | Zhang Jian,Xiang Jinwu School of Aeronautic Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China | 2009 | Chinese Journal of Aeronautics2009，22，4： | 14 |
| 5 | Flight safety measurements of UAVs in congested airspace显示文摘Describing spatial safety status is crucial for high-density air traffic involving multiple unmanned aerial vehicles(UAVs) in a complex environment. A probabilistic approach is proposed to measure safety situation in congested airspace. The occupancy distribution of the airspace is represented with conflict probability between spatial positions and UAV. The concept of a safety envelope related to flight performance and response time is presented first instead of the conventional fixed-size protected zones around aircraft. Consequently, the conflict probability is performance-dependent, and effects of various UAVs on safety can be distinguished. The uncertainty of a UAV future position is explicitly accounted for as Brownian motion. An analytic approximate algorithm for the conflict probability is developed to decrease the computational consumption. The relationship between safety and flight performance are discussed for different response times and prediction intervals. To illustrate the applications of the approach, an experiment of three UAVs in formation flight is performed. In addition, an example of trajectory planning is simulated for one UAV flying over airspace where five UAVs exist. The validation of the approach shows its potential in guaranteeing flight safety in highly dynamic environment. | Xiang Jinwu Liu Yang Luo Zhangping | 2016 | Chinese Journal of Aeronautics2016，29，5： | 14 |
| 6 | Optimization design and experiment on ripple surface type pickup finger of precision maize seed metering device显示文摘A ripple surface type pickup finger was designed to improve the performance of pickup finger precision maize seed metering device and to provide a solution for precision maize planter.The main structure and working principle of seed metering device were detailed in this paper.The dimension size distributions of maize seeds in different types were studied,the gestures of seeds clamped by pickup finger were analyzed,and the clamping dynamical model of pickup finger was established by theoretical analysis.To optimize the structural parameters of ripple surface type pickup finger,the discrete element method(DEM)model of pickup finger precision maize seed metering device was established by the discrete element software EDEM.The numerical simulations of orthogonal seeding performance experiments were conducted to analyze the influences of these factors on the quality of seeding.The rotational speed,wavelength of ripple surface and amplitude of ripple surface were selected as the experimental factors.The average seeding qualified index and the average seeding coefficient of variation on four different types of maize seeds were chosen for evaluating the seeding performance.The results showed that,the average seeding qualified index was 93.35%and the average seeding coefficient of variation was 11.23%under conditions of the 25 r/min rotational speed,8 mm wavelength of ripple surface and 2 mm amplitude of ripple surface.Under the same condition,the bench test was done which showed that the results of test and simulation were consistent.The maximum error of qualified index was 1.95%and the qualified index of improved seed metering device exceeded the original one by 12.34%.The working performance can meet the requirements of precision maize seeding. | Wang Jinwu Tang Han Wang Jinfeng Li Xin Huang Huinan | 2017 | International Journal of Agricultural and Biological Engineering2017，10，1： | 14 |
| 7 | Recent advance in nonlinear aeroelastic analysis and control of the aircraft显示文摘A review on the recent advance in nonlinear aeroelasticity of the aircraft is presented in this paper. The nonlinear aeroelastic problems are divided into three types based on different research objects,namely the two dimensional airfoil,the wing,and the full aircraft. Different nonlinearities encountered in aeroelastic systems are discussed firstly,where the emphases is placed on new nonlinear model to describe tested nonlinear relationship. Research techniques,especially new theoretical methods and aeroelastic flutter control methods are investigated in detail. The route to chaos and the cause of chaotic motion of two-dimensional aeroelastic system are summarized. Various structural modeling methods for the high-aspect-ratio wing with geometric nonlinearity are discussed. Accordingly,aerodynamic modeling approaches have been developed for the aeroelastic modeling of nonlinear high-aspect-ratio wings. Nonlinear aeroelasticity about high-altitude longendurance(HALE) and fight aircrafts are studied separately. Finally,conclusions and the challenges of the development in nonlinear aeroelasticity are concluded. Nonlinear aeroelastic problems of morphing wing,energy harvesting,and flapping aircrafts are proposed as new directions in the future. | Xiang Jinwu Yan Yongju Li Daochun | 2014 | Chinese Journal of Aeronautics2014，27，1： | 14 |
| 8 | Three-dimensional bioprinting of multicell-laden scaffolds containing bone morphogenic protein-4 for promoting M2 macrophage polarization and accelerating bone defect repair in diabetes mellitus显示文摘Critical-sized bone defect repair in patients with diabetes mellitus remains a challenge in clinical treatment because of dysfunction of macrophage polarization and the inflammatory microenvironment in the bone defect region.Three-dimensional(3D)bioprinted scaffolds loaded with live cells and bioactive factors can improve cell viability and the inflammatory microenvironment and further accelerating bone repair.Here,we used modified bioinks comprising gelatin,gelatin methacryloyl(GelMA),and 4-arm poly(ethylene glycol)acrylate(PEG)to fabricate 3D bioprinted scaffolds containing BMSCs,RAW264.7 macrophages,and BMP-4-loaded mesoporous silica nanoparticles(MSNs).Addition of MSNs effectively improved the mechanical strength of GelMA/gelatin/PEG scaffolds.Moreover,MSNs sustainably released BMP-4 for long-term effectiveness.In 3D bioprinted scaffolds,BMP-4 promoted the polarization of RAW264.7 to M2 macrophages,which secrete anti-inflammatory factors and thereby reduce the levels of pro-inflammatory factors.BMP-4 released from MSNs and BMP-2 secreted from M2 macrophages collectively stimulated the osteogenic differentiation of BMSCs in the 3D bioprinted scaffolds.Furthermore,in calvarial critical-size defect models of diabetic rats,3D bioprinted scaffolds loaded with MSNs/BMP-4 induced M2 macrophage polarization and improved the inflammatory microenvironment.And 3D bioprinted scaffolds with MSNs/BMP-4,BMSCs,and RAW264.7 cells significantly accelerated bone repair.In conclusion,our results indicated that implanting 3D bioprinted scaffolds containing MSNs/BMP-4,BMSCs,and RAW264.7 cells in bone defects may be an effective method for improving diabetic bone repair,owing to the direct effects of BMP-4 on promoting osteogenesis of BMSCs and regulating M2 type macrophage polarization to improve the inflammatory microenvironment and secrete BMP-2. | Xin Sun Zhenjiang Ma Xue Zhao Wenjie Jin Chenyu Zhang Jie Ma Lei Qiang Wenhao Wang Qian Deng Han Yang Jinzhong Zhao Qianqian Liang Xiaojun Zhou Tao Li Jinwu Wang | 2021 | Bioactive Materials2021，6，3： | 12 |
| 9 | The mechanism of barrier river reaches in the middle and lower Yangtze River显示文摘在它人工地或自然地被扰乱以后,冲积隧道总是以沉积运输的平衡国家调整了自己。怎么维持沉积运输的平衡国家并且使河政体稳定总是是河的 geomorphologists 的担心。在长江的中间、更低的活动范围的隧道被区分的河和单个线的河的蹒跚的分发描绘。河政体的变化比在单个线的河里在区分的河里猛烈地是更多。区分的河里的河政体的调整是否能通过单个线的河并且宣传到下游的活动范围,影响全面的河政体的稳定性。研究证明障碍河活动范围能阻止宣传到下游的活动范围接近在上游的隧道调整;因此,它在稳定河政体起一个关键作用。这研究在长江的中间、更低的活动范围调查 34 个单个线的河活动范围。根据长江的中间、更低的活动范围的河的进程的系统的摘要,障碍河活动范围的控制因素被总结并且提取:平面形态学单个线、蜿蜒地流;没有流动偏斜,节点在河活动范围的上面或中间的部分散布了;水力的几何系数是不到 4;纵的坡度比 12 大,凹面河岸的泥土内容比 9.5% 大,并且床沉积的中部的直径比 0.158 公里大。从海军司烧方程,流动的弯曲半径的计算公式动态轴被推出,然后这些的角色在限制流动的迁居上控制因素动态轴和障碍河活动范围的形成被分析。当时,障碍河活动范围被看作这到隧道边界的限制力量的动态轴是的流动的迁居力量的比率不到 1 在不同流动层次下面。障碍河活动范围的机制是以便甚至当在上游的河政体调整时,这个活动范围的隧道边界能总是抑制流动的移植振幅动态轴并且在不同的在上游的河政体条件下面集中主要的流线的平面位置,提供相对稳定的到来的流动为下游的活动范围调节,从而阻止宣传到下游的活动范围接近在上游的河政体调整。 | YOU Xingying TANG Jinwu ZHANG Xiaofeng HOU Weiguo YANG Yunping SUN Zhaohua WENG Zhaohui | 2017 | Journal of Geographical Sciences2017，27，10： | 9 |
| 10 | Virtual simulation analysis and verification of seed-filling mechanism for dipper hill-drop precision direct rice seeder显示文摘In order to improve the seeder’seed-filling ability of the dipper hill-drop precision direct rice seeder,and to meet the mechanization requirement of high speed operation,the self-designed seeder was taken as the objective to explore its seed-filling mechanism and the movement status of rice seed in seed box from the perspective of mechanics.The force models of seed-filling process by dipper were established,and the influential regularity of its rotation speed to compressive resistance of seed population was analyzed as well.The image processing Module-Clipping of discrete element simulation software EDEM was used in the virtual simulation analysis for the process of the seed filling into the dipper,and the velocity relation curve and the force changing curve between rotation speed and seeds were obtained.According to the virtual experiment,the composite filling force of seeds,i.e.the qualified rate on filled rice seed amounts was the largest when rotation speed was at 40 r/min.The performance test bed of seeder was used to verify the simulation results,in which the qualified rate on scooped rice seed amounts was taken as the index,and six rotation speeds of seed-filling dipper were also selected for analysis of seed-filling ability of the device.The results are as follows:with the increase of working speed,the qualified rate on filled rice seed amounts fluctuated with a trend of cosine curve,the largest value was 94.16%occurred when the rotation speed of seed-filling dipper was at 40 r/min.The variation trend of simulation value was approximately consistent with that of verification value.The study can provide a reference for the research and development of mechanical seeder. | Wang Jinwu Zhou Wenqi Tian Liquan Li Shuwei Zhang Zhao | 2017 | International Journal of Agricultural and Biological Engineering2017，10，6： | 7 |
| 11 | Review of production status of heavysteel castings and key technologies for their manufacture in China显示文摘This paper expatiates on domestic status of heavy steel casting production, with a special focus on hydraulicturbine castings for Three Gorges Project. In China, there is magnificent demand for heavy castings with the rapidgrowth of the national economy in recent years and the expected high growth in the coming 10 to 20 years. Someheavy and large castings such as mill housing and hydraulic turbine runner crown, blade and band for Three GorgesProject have been successfully made. However, the domestic production capability is still far from meeting the giganticrequirements. The domestic capability still lags behind the world class level, and a lot of heavy castings still dependon import. The paper also gives a particular introduction of the key technologies in the manufacturing of heavy steelcastings like metal melting, foundry technology, heat treatment technology and numerical simulation technique, etc.In addition, several case studies on the application of numerical simulation in the production of heavy steel castingsare presented. | Kang Jinwu Huang Tianyou Liu Baicheng | 2008 | China Foundry2008，5，1： | 7 |
| 12 | Aeroservoelastic modeling and analysis of a canard-configured air-breathing hypersonic vehicles显示文摘Air-breathing hypersonic vehicles (HSVs) are typically characterized by interactions of elasticity, propulsion and rigid-body flight dynamics, which may result in intractable aeroservoelastic problem. When canard is added, this problem would be even intensified by the introduction of low-frequency canard pivot mode. This paper concerns how the aeroservoelastic stability of a canard-configured HSV is affected by the pivot stiffnesses of all-moveable horizontal tail (HT) and canard. A wing/pivot system model is developed by considering the pivot torsional flexibility, fuselage vibration, and control input. The governing equations of the aeroservoelastic system are established by combining the equations of rigid-body motion, elastic fuselage model, wing/pivot system models and actuator dynamics. An unsteady aerodynamic model is developed by steady Shock-Expansion theory with an unsteady correction using local piston theory. A baseline controller is given to provide approximate inflight characteristics of rigid-body modes. The vehicle is trimmed for equilibrium state, around which the linearized equations are derived for stability analysis. A comparative study of damping ratios, closed-loop poles and responses are conducted with varying controller gains and pivot stiffnesses. Available bandwidth for control design is discussed and feasible region for pivot stiffnesses of HT and canard is given. | Zeng Kaichun Xiang Jinwu Li Daochun | 2013 | Chinese Journal of Aeronautics2013，26，4： | 7 |
| 13 | Coagulation factors VII, IX and X are effective antibacterial proteins against drug-resistant Gram-negative bacteria显示文摘Infections caused by drug-resistant“superbugs”pose an urgent public health threat due to the lack of effective drugs;however, certain mammalian proteins with intrinsic antibacterial activity might be underappreciated. Here, we reveal an antibacterial property against Gram-negative bacteria for factors VII, IX and X, three proteins with well-established roles in initiation of the coagulation cascade. These factors exert antibacterial function via their light chains (LCs). Unlike many antibacterial agents that target cell metabolism or the cytoplasmic membrane, the LCs act by hydrolyzing the major components of bacterial outer membrane, lipopolysaccharides, which are crucial for the survival of Gram-negative bacteria. The LC of factor VII exhibits in vitro efficacy towards all Gram-negative bacteria tested, including extensively drug-resistant (XDR) pathogens, at nanomolar concentrations. It is also highly effective in combating XDR Pseudomonas aeruginosa and Acinetobacter baumannii infections in vivo. Through decoding a unique mechanism whereby factors VII, IX and X behave as antimicrobial proteins, this study advances our understanding of the coagulation system in host defense, and suggests that these factors may participate in the pathogenesis of coagulation disorder-related diseases such as sepsis via their dual functions in blood coagulation and resistance to infection. Furthermore, this study may offer new strategies for combating Gram-negative “superbugs”. | Jinwu Chen Xiaojie Li Ling Li Ting Zhang Qing Zhang Fangming Wu Diyue Wang Hongze Hu Changlin Tian Dongsheng Liao Liang Zhao Danxia Song Yongyun Zhao Chuanfang Wu Xu Song | 2019 | Cell Research2019，29，9： | 6 |
| 14 | Aerodynamic Performance of the Locust Wing in Gliding Mode at Low Reynolds Number显示文摘 | Jinwu Xiang Jianxun Du Daochun Li Kai Liu | 2016 | Journal of Bionic Engineering2016，13，2： | 6 |
| 15 | Identification of differentially expressed genes in rat silicosis model by suppression subtractive hybridization analysis显示文摘在肺的纤维变性的发展的批评分子的机制仍然保持未知,让有差的预后的病人诊断。孤立在肺的纤维变性明确地起来调整的基因,我们建立了一个老鼠矽肺模型在有水晶的硅石暂停的治疗以后的 360 d。胸的拍证明一些散布高密度的阴影出现在肺地里。典型显微镜的小谎 rosing silicotic 小瘤在肺,牙槽的上皮的房间和支气管的上皮的房间形成了,特别地在部分 fibrosing silicotic 小瘤附近;他们中的一些显示出建议了在矽肺和肺癌症之间的关联的不正常的增生。抑制减少性的杂交分析被执行在肺织物把基因表示与矽肺和正常的肺织物作比较。反向的抄写聚合酶链反应证明七个新奇 cDNA 序列的表情由在有矽肺的肺织物的减少性的杂交不同于的抑制识别了正常的肺织物。生物信息学分析证明 47 积极克隆代表了包含二通常认为的蛋白质的 35 基因,四预言了类似的蛋白质。分析也证明一些在矽肺屏蔽了基因,例如 prolyl 4-hydroxylases,肌动朊相关的 protein-2/3 建筑群和酸的哺乳动物的 chitinase,以前没被报导。这些基因可以为在肺的纤维变性的发展调查分子的机制提供新线索。 | Zhongyuan Jin Baoan Liu Deyun Feng Chen Chen Xiang Li Yongbin Hu Jinwu Peng Yu Liu Jing Du Chunyan Fu Jifang Wen | 2008 | Acta Biochimica et Biophysica Sinica2008，40，8： | 6 |
| 16 | Challenges and developments of automotive fuel cell hybrid power system and control显示文摘Fuel cells are emerging as promising power sources and have attracted increasing attention from industries and academics worldwide. In particular, automotive manufacturers are replacing internal combustion engines in vehicles with fuel cell systems, which are advantaged by zero emissions, high efficiency,and various clean routes that generate pure hydrogen. However, current fuel cell systems are costly, and their corresponding infrastructures are not fully qualified to meet current market demand. This paper reviews the challenges and developments of automotive fuel cell hybrid power systems and their controls. It briefly summarizes the model, control, and optimization issue associated with the research and application of fuel cells in hybrid power systems. After presenting the basic knowledge and discussing the trending size and structure of fuel cells for automotive usage, the review describes models of automotive fuel cell systems,focusing on the electrochemical reaction dynamics and the key parameters influencing their efficiency and lifetime. The control problems associated with automotive fuel cell systems as well as the optimization issue associated with hybrid energy systems(comprising fuel cells, batteries, and ultra-capacitors) are elaborately analyzed. The review concludes with current problems and challenges faced by the energy control systems of fuel cell vehicles. | Jinwu GAO Meng LI Yunfeng HU Hong CHEN Yan MA | 2019 | Science China(Information Sciences)2019，62，5： | 6 |
| 17 | Application of a new feature extraction and optimization method to surface defect recognition of cold rolled strips显示文摘Considering that the surface defects of cold rolled strips are hard to be recognized by human eyes under high-speed cir- cumstances, an automatic recognition technique was discussed. Spectrum images of defects can be got by fast Fourier transform (FFT) and sum of valid pixels (SVP), and its optimized center region, which concentrates nearly all energies, are extracted as an original feature set. Using genetic algorithm to optimize the feature set, an optimized feature set with 51 features can be achieved. Using the optimized feature set as an input vector of neural networks, the recognition effects of LVQ neural networks have been studied. Experiment results show that the new method can get a higher classification rate and can settle the automatic recognition problem of surface defects on cold rolled strips ideally. | Guifang Wu Ke Xu Jinwu Xu | 2007 | Journal of University of Science and Technology Beijing2007，14，5： | 5 |
| 18 | Structure optimization of cam executive component and analysis of precisely applying deep-fertilization liquid fertilizer显示文摘Since there are some problems in the previous cam of deep-fertilization liquid fertilizer applicator,such as poor precision and low-fertilization performance,a method of the contour line of a cam was proposed based on Matlab GUI development platform.Bernoulli’equation between the liquid fertilizer and the pressure valve of the fertilizer-spraying needle was founded.Moreover,the motion angles of a rise travel and return travel were corrected and the corresponding parameters of the contour line of the cam were obtained.Equations of cam moving from rise travel to return travel were derived according to the simple harmonic motion.In addition,3D model of cam was established by applying the Pro/E software and the rationality of the cam design was verified.The static analysis of the cam was carried out under working conditions and the corresponding dynamics analysis was performed based on D’Alembert’s principle.And then relationships between the binding force and the drag torque were obtained.A bench test indicates that when the pressure of a hydraulic pump is 0.5 MPa and the velocity of a output shaft is 50 r/min,the average consumption of the fertilizer is 19.7 mL for each measurement,which meets the corresponding agronomic requirement,i.e.20 mL.When the rotation angle of the cam is 8.6°and the rise displacement of a plunger is 0.84 mm,the mouth of the fertilizer-spraying needle sprayed liquid fertilizer as soon as it got into the soil and stopped spraying as soon as it got out of the soil.The results show that the designed contour line of the cam meets the requirement,that is,the mouth of the fertilizer-spraying needle should spray liquid fertilizer as soon as it gets into the soil and stop spraying as soon as it gets out of the soil,which meets the agronomic requirements,that is,fertilizer should be sprayed deeply and precisely.And this study lays a theoretical foundation for designing the cam of intermittent type distributor and provides relevant parameters. | Wenqi Zhou Jinwu Wang Han Tang | 2019 | International Journal of Agricultural and Biological Engineering2019，12，4： | 5 |
| 19 | 纤维素/聚乳酸复合材料的结构与性能显示文摘以机械球磨法预处理纸浆纤维素纤维,研究球磨对纤维素形貌和结构的影响;以纤维素颗粒为填料,通过熔融加工方法,制备出可完全再生且可完全降解的聚乳酸(PLA)复合材料,对复合材料的形貌、结构和性能进行了表征测试。结果表明,作为干法工艺,机械球磨可以简便地制备微晶纤维素(MCC)。加入纤维素颗粒以后,复合材料的冲击强度显著增加(最高达70.7%),断面出现韧性断裂特征;PLA的玻璃化转变温度和冷结晶温度升高,最大分解速率温度降低约15℃,热稳定性略有下降。 | 强涛 Wang Jinwu Wolcott P Michael | 2018 | 高分子材料科学与工程2018，34，6： | 5 |
| 20 | HIGHER ORDER SPECTRAL ANALYSIS IN FAULT DIAGNOSIS OF ROTORS显示文摘The nonlinear properties of rotating machinery vibration signals are presented. The relationship between faults and quadratic phase coupling is discussed. The mechanism that gives rise to quadratic phase coupling is analyzed, and the coupling models are summarized. As a result, higher order spectra analysis is introduced into fault diagnosis of rotors. A brief review of the properties of higher order spectra is presented. Furthermore, the bicoherence spectrum is employed to extract the features that signify the machinery condition. Experiments show that bicoherence spectrum patterns of different faults are quite different, so it is proposed to identify the faults in rotors. | Yang Jiangtian Xu Jinwu School of Mechanical Engineering, Beijing University of Sicence and Technology | 2001 | Chinese Journal of Mechanical Engineering2001，14，1： | 4 |
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