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| 1 | Auto-normalization algorithm for robotic precision drilling system in aircraft component assembly显示文摘A novel approach is proposed to detect the normal vector to product surface in real time for the robotic precision drilling system in aircraft component assembly, and the auto-normalization algorithm is presented based on the detection system. Firstly, the deviation between the normal vector and the spindle axis is measured by the four laser displacement sensors installed at the head of the multi-function end effector. Then, the robot target attitude is inversely solved according to the auto-normalization algorithm. Finally, adjust the robot to the target attitude via pitch and yaw rotations about the tool center point and the spindle axis is corrected in line with the normal vector simultaneously. To test and verify the auto-normalization algorithm, an experimental platform is established in which the laser tracker is introduced for accurate measurement. The results show that the deviations between the corrected spindle axis and the normal vector are all reduced to less than 0.5°, with the mean value 0.32°. It is demonstrated the detection method and the autonormalization algorithm are feasible and reliable. | Tian Wei Zhou Weixue Zhou Wei Liao Wenhe Zeng Yuanfan | 2013 | Chinese Journal of Aeronautics2013，26，2： | 35 |
| 2 | Calibration of robotic drilling systems with a moving rail显示文摘Industrial robots are widely used in aircraft assembly systems such as robotic drilling systems. It is necessary to expand a robot's working range with a moving rail. A method for improving the position accuracy of an automated assembly system with an industrial robot mounted on a moving rail is proposed. A multi-station method is used to control the robot in this study. The robot only works at stations which are certain positions defined on the moving rail. The calibration of the robot system is composed by the calibration of the robot and the calibration of the stations.The calibration of the robot is based on error similarity and inverse distance weighted interpolation.The calibration of the stations is based on a magnetic strip and a magnetic sensor. Validation tests were performed in this study, which showed that the accuracy of the robot system gained significant improvement using the proposed method. The absolute position errors were reduced by about 85%to less than 0.3 mm compared with the maximum nearly 2 mm before calibration. | Tian Wei Zeng Yuanfan Zhou Wei Liao Wenhe | 2014 | Chinese Journal of Aeronautics2014，27，6： | 14 |
| 3 | Analysis of 2D Flow and Heat Transfer Modeling in Fracture of Porous Media显示文摘Heat and mass transfer between porous media and fluid is a complex coupling process, which is widely used in various fields of engineering applications, especially for natural and artificial fractures in oil and gas extraction. In this study, a new method is proposed to deal with the flow and heat transfer problem of steady flow in a fracture. The fluid flow in a fracture was described using the same method as Mohais, who considered a fracture as a channel with porous wall, and the perturbation method was used to solve the mathematical model. Unlike previous studies, the shear jump boundary condition proposed by Ochoa-Tapia and Whitaker was used at the interface between the fluid and porous media. The main methods were perturbation analysis and the application of shear jump boundary conditions. The influence of permeability, channel width, shear jump degree and effective dynamic viscosity on the flow and heat transfer in the channel was studied by analysing the analytical solution. The distribution of axial velocity in the channel with the change of the typical parameters and the sensitivity of the heat transfer was obtained. | GUO Chunsheng NIAN Xianbo LIU Yong QI Chao SONG Jinsheng YU Wenhe | 2017 | Journal of Thermal Science2017，26，4： | 9 |
| 4 | Design of Drilling and Riveting Multi-functional End Effector for CFRP and Aluminum Components in Robotic Aircraft Assembly显示文摘To fulfill the demands for higher quality,efficiency and flexibility in aviation industry,a multi-functional end effector is designed to automate the drilling and riveting processes in assembling carbon fiber reinforced polymer(CFRP)and aluminum components for a robotic aircraft assembly system.To meet the specific functional requirements for blind rivet installation on CFRP and aluminum materials,additional modules are incorporated on the end effector aside of the basic processing modules for drilling.And all of these processing modules allow for a onestep-drilling-countersinking process,hole inspection,automatic rivet feed,rivet geometry check,sealant application,rivet insertion and installation.Besides,to guarantee the better quality of the hole drilled and joints riveted,several online detection and adjustment measures are applied to this end effector,including the reference detection and perpendicular calibration,which could effectively ensure the positioning precision and perpendicular accuracy as demanded.Finally,the test result shows that this end effector is capable of producing each hole to a positioning precision within ±0.5 mm,aperpendicular accuracy within 0.3°,a diameter tolerance of H8,and a countersink depth tolerance of±0.01 mm.Moreover,it could drill and rivet up to three joints per minute,with acceptable shearing and tensile strength. | Zhang Lin Tian Wei Li Dawei Hong Peng Li Zhenyu Zhou Weixue Liao Wenhe | 2018 | Transactions of Nanjing University of Aeronautics and Astronautics2018，35，3： | 5 |
| 5 | Formation of interlayer gap and control of interlayer burr in dry drilling of stacked aluminum alloy plates显示文摘In aircraft assembly, interlayer burr formation in dry drilling of stacked metal materials is a common problem. Traditional manual deburring operation seriously affects the assembly quality and assembly efficiency, is time-consuming and costly, and is not conducive to aircraft automatic assembly based on industrial robot. In this paper, the formation of drilling exit burr and the influence of interlayer gap on interlayer burr formation were studied, and the mechanism of interlayer gap formation in drilling stacked aluminum alloy plates was investigated, a simplified mathematical model of interlayer gap based on the theory of plates and shells and finite element method was established. The relationship between interlayer gap and interlayer burr, as well as the effect of feed rate and pressing force on interlayer burr height and interlayer gap was discussed. The result shows that theoretical interlayer gap has a positive correlation with interlayer burr height and preloading pressing force is an effective method to control interlayer burr formation. | Tian Wei Hu Jian Liao Wenhe Bu Yin Zhang Lin | 2016 | Chinese Journal of Aeronautics2016，29，1： | 5 |
| 6 | Broadband terahertz wave generation from an epsilon-near-zero material显示文摘Broadband light sources emitting in the terahertz spectral range are highly desired for applications such as noninvasive imaging and spectroscopy.Conventionally,THz pulses are generated by optical rectification in bulk nonlinear crystals with millimetre thickness,with the bandwidth limited by the phase-matching condition.Here we demonstrate broadband THz emission via surface optical rectification from a simple,commercially available 19nmthick indium tin oxide(ITO)thin film.We show an enhancement of the generated THz signal when the pump laser is tuned around the epsilon-near-zero(ENZ)region of ITO due to the pump laser field enhancement associated with the ENZ effect.The bandwidth of the THz signal generated from the ITO film can be over 3 THz,unrestricted by the phasematching condition.This work offers a new possibility for broadband THz generation in a subwavelength thin film made of an ENZ material,with emerging physics not found in existing nonlinear crystals. | Wenhe Jia Meng Liu Yongchang Lu Xi Feng Qingwei Wang Xueqian Zhang Yibo Ni Futai Hu Mali Gong Xinlong Xu Yuanyuan Huang Weili Zhang Yuanmu Yang Jiaguang Han | 2021 | Light(Science & Applications)2021，10，1： | 4 |
| 7 | Picosecond Laser Surface Texturing of a Stavax Steel Substrate for Wettability Control显示文摘In this investigation,a picosecond laser was employed to fabricate surface textures on a Stavax steel substrate,which is a key material for mold fabrication in the manufacturing of various polymer products.Three main types of surface textures were fabricated on a Stavax steel substrate:periodic ripples,a two-scale hierarchical two-dimensional array of micro-bumps,and a micro-pits array with nanoripples.The wettability of the laser-textured Stavax steel surface was converted from its original hydrophilicity into hydrophobicity and even super-hydrophobicity after exposure to air.The results clearly show that this super-hydrophobicity is mainly due to the surface textures.The ultrafast laserinduced catalytic effect may play a secondary role in modifying the surface chemistry so as to lower the surface energy.The laser-induced surface textures on the metal mold substrates were then replicated onto polypropylene substrates via the polymer injection molding process.The surface wettability of the molded polypropylene was found to be changed from the original hydrophilicity to superhydrophobicity.This developed process holds the potential to improve the performance of fabricated plastic products in terms of wettability control and easy cleaning. | Xincai Wang Hongyu Zheng Yinchi Wan Wenhe Feng Yee Cheong Lam | 2018 | Engineering2018，4，6： | 4 |
| 8 | Decrease in the Ki67 index during neoadjuvant chemotherapy predicts favorable relapse-free survival in patients with locally advanced breast cancer显示文摘Objective: The purpose of this study was to explore the optimal cutoffs of the three parameters of Ki67 during NAC for predicting patient prognosis and investigate whether the optimal cutoffs of the Ki67 values were associated with relapse-free survival(RFS) or breast cancer-specific survival(BCSS).Methods: A total of 92 patients with locally advanced breast cancer(LABC), who had residual disease after NAC were retrospectively investigated.The optimal cutoff values of the Ki67 parameters were assessed by the online algorithm Cutoff Finder.Kaplan-Meier analysis, the log-rank test and Cox regression analysis were carried out to analyze survival.Results: The optimal cutoff values for the postsurgical Ki67 level and the decrease in the Ki67 level during NAC were defined as 25% and 12.5%, respectively.According to the univariate survival analysis, a higher Ki67 level in residual disease was associated with poor RFS(P = 0.004) and BCSS(P = 0.014).In addition, a Ki67 expression decrease > 12.5% during NAC was related to favorable RFS(P = 0.007), but was not related to BCSS(P = 0.452).Cox regression analysis showed that the Ki67 expression decrease(> 12.5% vs.≤ 12.5%) and histological grade(grade 3 vs.grade 1-2) were the independent factors associated with RFS(P =0.020 and P = 0.023, respectively), with HR values of 0.353(95% CI: 0.147-0.850) and 3.422(95% CI: 1.188-9.858), respectively.Conclusions: The Ki67 decrease was one of the independent factors associated with RFS in LABC patients with residual disease after receiving NAC. | Chunfa Chen Yuling Zhang Ziyi Huang Jundong Wu Wenhe Huang Guojun Zhang | 2019 | Cancer Biology & Medicine2019，16，3： | 4 |
| 9 | Targeting fatty acid synthase sensitizes human nasopharyngeal carcinoma cells to radiationvia downregulating frizzled class receptor 10显示文摘Objective:Our aim was to test the hypothesis that fatty acid synthase(FASN)expression contributes to radioresistance of nasopharyngeal carcinoma(NPC)cells and that inhibiting FASN enhances radiosensitivity.Methods:Targeting FASN using epigallocatechin gallate(EGCG)or RNA interference in NPC cell lines that overexpress endogenous FASN was performed to determine their effects on cellular response to radiationin vitro using MTT and colony formation assays,andin vivo using xenograft animal models.Western blot,immunohistochemistry,real-time PCR arrays,and real-time RT-PCR were used to determine the relationship between FASN and frizzled class receptor 10(FZD10)expression.FZD10 knockdown and overexpression were used to determine its role in mediating FASN function in cellular response to radiation.Immunohistochemical staining was used to determine FASN and FZD10 expressions in human NPC tissues,followed by analysis of their association with the overall survival of patients.Results:FASN knockdown or inhibition significantly enhanced radiosensitivity of NPC cells,bothin vitro andin vivo.There was a positive association between FASN and FZD10 expression in NPC cell lines grown as monolayers or xenografts,as well as human tissues.FASN knockdown reduced FZD10 expression,and rescue of FZD10 expression abolished FASN knockdown-induced enhancement of radiosensitivity.FASN and FZD10 were both negatively associated with overall survival of NPC patients.Conclusions:FASN contributes to radioresistance,possiblyvia FZD10 in NPC cells.Both FZD10 and FASN expressions were associated with poor outcomes of NPC patients.EGCG may sensitize radioresistance by inhibiting FASN and may possibly be developed as a radiosensitizer for better treatment of NPCs. | Jiongyu Chen Fan Zhang Xiaosha Ren Yahui Wang Wenhe Huang Jianting Zhang Yukun Cui | 2020 | Cancer Biology & Medicine2020，17，3： | 3 |
| 10 | Manufacturing Resource Planning Technology Based on Genetic Programming Simulationnn显示文摘Network-based manufacturing is a kind of distributed system, which enables manufacturers to finish production tasks as well as to grasp the opportunities in the market, even if manufacturing resources are insufficient. One of the main problems in network-based manufacturing is the allocation of resources and the assignment of tasks rationally, according to flexible resource distribution. The mapping rules and relations between production techniques and resources are proposed, followed by the definition of the resource unit. Ultimately, the genetic programming method for the optimization of the manufacturing system is put forward. A set of software for the optimization system of simulation process using genetic programming techniques has been developed, and the problems of manufacturing resource planning in network-based manufacturing are solved with the simulation of optimizing methods by genetic programming. The optimum proposal of hardware planning, selection of company and scheduling will be obtained in theory to help company managers in scientific decision-making. | GAO Shiwen LIAO Wenhe GUO Yu LIU Jinshan SU Yan | 2009 | Chinese Journal of Mechanical Engineering2009，22，2： | 3 |
| 11 | Minimum cost attribute reduction in decision-theoretic rough set models显示文摘 | Xiuyi Jia Wenhe Liao Zhenmin Tang Lin Shang | 2013 | Information Sciences2013，，： | 2 |
| 12 | Lin28 promotes Her2 expression and Lin28/Her2 predicts poorer survival in gastric cancer显示文摘 | Qinchuan Wang Jichun Zhou Jufeng Guo Rongyue Teng Jianguo Shen Yasheng Huang Shuduo Xie Qun Wei Wenhe Zhao Wenjun Chen Xiaoming Yuan Yongxia Chen Linbo Wang | 2014 | Tumor Biology2014，，11： | 1 |
| 13 | Adsorption and desorption behaviors of S-adenosyl-L-methionine in a fixedbed ion-exchange column显示文摘 | Xu Zhinan Chen Yong Shen Wenhe | 2006 | The Korean Journal of Chemical Engineering2006，23，1： | 1 |
| 14 | Design of a custom angled a- butment for dental implants using computer - aided design and nonlinear finite element analysis显示文摘 | Ting Wu Wenhe Liao Ning Dai | 2010 | Journal of Biomechanics2010，43，10： | 1 |
| 15 | Bioassay of mildiomycin and a rapid,cost-effective agar plug method for screening high-yielding mutants of mildiomycin显示文摘 | Xie Zhipeng Xu Zhinan Shen Wenhe | 2005 | World Journal of Microbiology and Biotechnology2005，21，8： | 1 |
| 16 | Simulated annealing for financing cost distribution based project payment scheduling from a joint perspective显示文摘 | Zheng Wenhe | 2014 | Annals of Operations Research2014，213，1： | 1 |
| 17 | Key technolo- gies for ASP - based product customization service system for SMEs: A case study 显示文摘 | YAN SU WENHE LIAO YU GUO QIULIN DING | 2009 | International Journal Advanced Manufacturing Technology2009，42，： | 1 |
| 18 | Angle-of-arrival fluctuations for wave propagation through non-kolmogorov turbulence 显示文摘 | Du Wenhe Yu Siyuan Tan Liying | 2009 | Opt Commun2009，282，5： | 1 |
| 19 | Experiment investigation on spontaneous combustion of iron sulfides in oil tank显示文摘 | WANG Wenhe XU Zhisheng SUN Baojiang | 2013 | Advanced Materials Research2013，，： | 1 |
| 20 | Intra-ventral tegmental area injection of rat cocaine and amphetamine-regulated transcript peptide 55-102 induces locomotor activity and promotes conditioned place preference显示文摘 | Kimmel HL Gong Wenhe Vechia SD | 2000 | J Pharmacol Exp Ther2000，294，2： | 1 |
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