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| 1 | Development of a Drilling and Coring Test-bed for Lunar Subsurface Exploration and Preliminary Experiments显示文摘Drill sampling has been widely employed as an effective way to acquire deep samples in extraterrestrial exploration. A novel sampling method, namely, flexible-tube coring, was adopted for the Chang'e mission to acquire drilling cores without damaging stratification information. Since the extraterrestrial environment is uncertain and different from the terrestrial environment, automated drill sampling missions are at risk of failure. The principles of drilling and coring for the lunar subsurface should be fully tested and verified on earth before launch. This paper proposes a test-bed for conducting the aforementioned experiments on earth. The test-bed comprises a rotary-percussive drilling mechanism, penetrating mechanism, drilling medium container, and signal acquisition and control system. For granular soil, coring experiments indicate that the sampling method has a high coring rate greater than 80%. For hard rock, drilling experiments indicate that the percussive frequency greatly affects the drilling efficiency. A multi-layered simulant composed of granular soil and hard rock is built to test the adaptability of drilling and coring. To tackle complex drilling media, an intelligent drilling strategy based on online recognition is proposed to improve the adaptability of the sampling drill. The primary features of this research are the proposal of a scheme for drilling and coring a test-bed for validation on earth and the execution of drilling experiments in complex media. | SHI Xiaomeng DENG Zongquan QUAN Qiquan TANG Dewei HOU Xuyan JIANG Shengyuan | 2014 | Chinese Journal of Mechanical Engineering2014，27，4： | 10 |
| 2 | Drilling Power Consumption and Soil Conveying Volume Performances of Lunar Sampling Auger显示文摘The sampling auger used in lunar sampling and return mission is to transmit power and convey soil, and its performance is the key factor of the whole mission. However, there is currently a lack of the optimization research on soil conveying volume and power consumption models in auger structure design. To provide the drilled object, the simulation lunar soil, whose physical and mechanical property is the same as the real soil, is made by reducing soil void ratio. The models are formulated to analyze the influence of auger structure parameters on power consumption and soil conveying volume. To obtain the optimized structure parameters of auger, the multi-objective optimization functions of the maximum soil conveying volume and minimum power consumption are developed. To verify the correctness of the models, the performances of different augers drilling simulation soil are tested. The test results demonstrate that the power consumption of optimized auger is the lowest both in theory and test, and the experimental results of soil conveying volume are in agreement with theoretical analysis. Consequently, a new method for designing a lunar sampling auger is proposed which includes the models of soil conveying volume and transportation power consumption, the optimization of structure parameters and the comparison tests. This method provides a reference for sampling auger designing of the Chinese Lunar Sample Mission. | TIAN Ye TANG Dewei DENG Zongquan JIANG Shengyuan QUAN Qiquan | 2015 | Chinese Journal of Mechanical Engineering2015，28，3： | 9 |
| 3 | Multi-state autonomous drilling for lunar exploration显示文摘Due to the lack of information of subsurface lunar regolith stratification which varies along depth, the drilling device may encounter lunar soil and lunar rock randomly in the drilling process. To meet the load safety requirements of unmanned sampling mission under limited orbital resources, the control strategy of autonomous drilling should adapt to the indeterminable lunar environments. Based on the analysis of two types of typical drilling media(i.e., lunar soil and lunar rock), this paper proposes a multi-state control strategy for autonomous lunar drilling. To represent the working circumstances in the lunar subsurface and reduce the complexity of the control algorithm, lunar drilling process was categorized into three drilling states: the interface detection, initiation of drilling parameters for recognition and drilling medium recognition. Support vector machine(SVM) and continuous wavelet transform were employed for the online recognition of drilling media and interface, respectively. Finite state machine was utilized to control the transition among different drilling states. To verify the effectiveness of the multi-state control strategy, drilling experiments were implemented with multi-layered drilling media constructed by lunar soil simulant and lunar rock simulant. The results reveal that the multi-state control method is capable of detecting drilling state variation and adjusting drilling parameters timely under vibration interferences.The multi-state control method provides a feasible reference for the control of extraterrestrial autonomous drilling. | Chen Chongbin Quan Qiquan Shi Xiaomeng Deng Zongquan Tang Dewei Jiang Shengyuan | 2016 | Chinese Journal of Aeronautics2016，29，5： | 3 |
| 4 | Recent progress in perovskite solar cells:from device to commercialization显示文摘Perovskite solar cells(PSCs) are undergoing rapid development and the power conversion efficiency reaches 25.7% which attracts increasing attention on their commercialization recently.In this review,we summarized the recent progress of PSCs based on device structures,perovskite-based tandem cells,large-area modules,stability,applications and industrialization.Last,the challenges and perspectives are discussed,aiming at providing a thrust for the commercialization of PSCs in the near future. | Xinhui Luo Xuesong Lin Feng Gao Yang Zhao Xiaodong Li Liqing Zhan Zexiong Qiu Jin Wang Cong Chen Lei Meng Xiaofeng Gao Yu Zhang Zijian Huang Rundong Fan Huifen Liu Yanrun Chen Xiaoxue Ren Jiahong Tang Chun-Hao Chen Dong Yang Yongguang Tu Xiao Liu Dongxue Liu Qing Zhao Jingbi You Junfeng Fang Yongzhen Wu Hongwei Han Xiaodan Zhang Dewei Zhao Fuzhi Huang Huanping Zhou Yongbo Yuan Qi Chen Zhaokui Wang Shengzhong(Frank)Liu Rui Zhu Jotaro Nakazaki Yongfang Li Liyuan Han | 2022 | Science China Chemistry2022，65，12： | 1 |
| 5 | Study on rigid - body guidance synthesis of planar linkage显示文摘 | Wang Zhixing Yu Hongying Tang Dewei | 2002 | Mechanism and Machine Theory2002，37，7： | 1 |
| 6 | Study on a new computer path synthesis method of a four-bar linkage显示文摘 | Yu Hongying Tang Dewei Wang Zhixing | 2006 | Mechanism and Machine Theory2006，，4： | 1 |
| 7 | Oleate desaturase enzymes of soybean: evidence of regulation through differential stability and phosphorylation 显示文摘 | Tang GQ Novitzky WP Griffin HC Huber SC Dewey RE | 2005 | Plant J2005，44，3： | 1 |
| 8 | Study on Rigid-body Guidance Synthesis of Planar Linkage 显示文摘 | Wang Zhixing Yu Hongying Tang Dewei | 2002 | Mechanism and Machine Theory2002，37，7： | 1 |
| 9 | Study on a new computer path synthesis method of a four- bar linkage显示文摘 | Yu Hongying Tang Dewei Wang Zhixing | 2007 | Mechanism and Machine Theory2007，42，4： | 1 |
| 10 | Fabrication and plasma resistance properties of transparent YAG ceramics显示文摘 | Xianpeng Qin Guohong Zhou Hao Yang Jen It Wong Jian Zhang Dewei Luo Shiwei Wang Jan Ma Dingyuan Tang | 2011 | Ceramics International2011，，3： | 1 |
| 11 | Fabrication and laser properties of transparent Yb:YAG ceramics显示文摘 | Dewei Luo Jian Zhang Changwen Xu Xianpeng Qin Dingyuan Tang Jan Ma | 2011 | Optical Materials2011，，6： | 1 |
| 12 | Fabrication and properties of highly transparent Er:YAG ceramics显示文摘 | Xianpeng Qin Hao Yang Guohong Zhou Dewei Luo Yan Yang Jian Zhang Shiwei Wang Jan Ma Dingyuan Tang | 2011 | Optical Materials2011，，6： | 1 |
| 13 | Oleate desaturase enzymes of soybean:evidence of regulation through differential stability and phosphorylation显示文摘 | Tang G Q Novitzky W P Griffin H C Huber S C Dewey R E | | 0，，： | 1 |
| 14 | Simulation and analysis of asteroid force closure anchoring performance based on discrete element method显示文摘Asteroid exploration is significant for studying the origin of the solar system,establishing planetary defenses,and alleviating the resource crisis of the Earth.Asteroid anchoring is the basis of in-situ exploration and resource development and utilization.Therefore,the performance of asteroid force-closure anchoring is investigated using the discrete element method.The micro parameters of the simulated materials are calibrated with angle of repose and uniaxial compression experiments,based on which the regional modeling method is adopted to establish the anchoring discrete element model.Asteroid anchoring experiments are conducted on a self-developed microgravity simulation platform to verify the accuracy of the simulation model.The asteroid anchoring simulations are performed to investigate the influence of external force on the anchoring performance.The analysis of anchoring force varying with time and the interaction between the anchor and regolith particles reveals the influence mechanism of external force direction on the anchoring performance.The external force direction affects the critical anchoring force by influencing the failure of the force-closure structure.The comprehensive analysis of simulation results clarifies the variation of the critical anchoring force with the external forces.Finally,a stable anchoring region is established,beneficial for asteroid anchoring device design. | Tingzhang WANG Qiquan QUAN Hongshuai GAO Mengxue LI Dewei TANG Zongquan DENG | 2023 | Chinese Journal of Aeronautics2023，36，8： | 0 |
| 15 | Boosted sodium ion storage performance in MnO_(2):Understanding the bond angle-mediated orbital overlap in MnO_(6)units for fast charge transfer显示文摘Symmetric six oxygen-coordinated Mn structural units(MnO6)in MnO2 with small Mn–O orbital overlap hamper electron transfer rates during energy storage.Herein,we report a novel bond angle modulation strategy to manipulate Mn–O orbital overlap in MnO2 through the construction of Mn vacancies(MnO2-VMn),aiming at expediting electron transfer,and thus enhancing energy storage performance.Both experimental and theoretical results disclose that the amplification of Mn–O–Mn bond angles exclusively augments the Mn(dx2-y2)-O(py)orbital overlap and triggers the electron redistribution in MnO2-VMn,inducing an augmented Mn dx2-y2 electron occupation.This heightened presence of active electrons in the Mn dx2-y2 orbital paves the way for accelerating electron transfer and ion transfer in MnO2-VMn.Notably,MnO2-VMn delivers an improved specific capacitance of 425 F g−1 at 1 A g−1 and a superior rate capacity of 265 F g−1 at 20 A g−1.Furthermore,an asymmetric supercapacitor(MnO2-VMn//AC ASC)was fabricated,exhibiting a high energy density of 64.3 Wh kg−1 at a power density of 1000 W kg−1.Furthermore,theoretical insights uncover the profound implications of metal–oxygen–metal bond angle regulation on interatomic orbital overlap modulation.These revelations illuminate pathways for the design of advanced energy storage materials. | Jinrui Wang Zishan Hou Xia Liu Shiyu Wang Shuyun Yao Yebo Yao Dewei Wang Xueying Gao Huiying Zhang Zheng Tang Yuanming Liu Kaiqi Nie Jiangzhou Xie Zhiyu Yang Yi-Ming Yan | 2023 | Journal of Energy Chemistry2023，，12： | 0 |
| 16 | Novel transparent ceramics for solid-state lasers显示文摘Recent progress on rare-earth doped polycrystalline YAG transparent ceramics has made them an alternative novel solid-state laser gain material. In this paper, we present results of our research on polycrystalline RE:YAG transparent ceramics. High optical quality YAG ceramics doped with various rare-earth(RE) ions such as Nd3+, Yb3+, Er3+,Tm3+, and Ho3+have been successfully fabricated using the solid-state reactive sintering method. Highly efficient laser oscillations of the fabricated ceramics are demonstrated. | Hao Yang Jian Zhang Dewei Luo Hui Lin Deyuan Shen Dingyuan Tang | 2013 | High Power Laser Science and Engineering2013，1，Z1： | 0 |
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