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| 1 | FOUR-PARAMETER AUTOMATIC TRANSMISSION TECHNOLOGY FOR CONSTRUCTION VEHICLE BASED ON ELMAN RECURSIVE NEURAL NETWORK显示文摘From the viewpoint of energy saving and improving transmission efficiency,the ZL50E wheel loader is taken as the study object. And the system model is analyzed based on the transmission system of the construction vehicle. A new four-parameter shift schedule is presented,which can keep the torque converter working in the high efficiency area. The control algorithm based on the Elman recursive neural network is applied,and four-parameter control system is developed which is based on industrial computer. The system is used to collect data accurately and control 4D180 power-shift gearbox of ZL50E wheel loader shift timely. An experiment is done on automatic transmission test-bed,and the result indicates that the control system could reliably and safely work and improve the efficiency of hydraulic torque converter. Four-parameter shift strategy that takes into account the power consuming of the working pump has important operating significance and reflects the actual working status of construction vehicle. | ZHANG Hongyan ZHAO Dingxuan TANG Xinxing Ding Chunfeng | 2008 | Chinese Journal of Mechanical Engineering2008，21，1： | 6 |
| 2 | Engineering an enthesis-like graft for rotator cuff repair:An approach to fabricate highly biomimetic scaffold capable of zone-specifically releasing stem cell differentiation inducers显示文摘Rotator cuff(RC)attaches to humerus across a triphasic yet continuous tissue zones(bone-fibrocartilage-tendon),termed“enthesis”.Regrettably,rapid and functional enthesis regeneration is challenging after RC tear.The existing grafts bioengineered for RC repair are insufficient,as they were engineered by a scaffold that did not mimic normal enthesis in morphology,composition,and tensile property,meanwhile cannot simultaneously stimulate the formation of bone-fibrocartilage-tendon tissues.Herein,an optimized decellularization approach based on a vacuum aspiration device(VAD)was developed to fabricate a book-shaped decellularized enthesis matrix(O-BDEM).Then,three recombinant growth factors(CBP-GFs)capable of binding collagen were synthesized by fusing a collagen-binding peptide(CBP)into the N-terminal of BMP-2,TGF-β3,or GDF-7,and zone-specifically tethered to the collagen of O-BDEM to fabricate a novel scaffold(CBP-GFs/O-BDEM)satisfying the above-mentioned requirements.After ensuring the low immunogenicity of CBP-GFs/O-BDEM by a novel single-cell mass cytometry in a mouse model,we interleaved urine-derived stem cell-sheets into this CBP-GFs/O-BDEM to bioengineer an enthesis-like graft.Its high-performance on regenerating enthesis was determined in a canine model.These findings indicate this CBP-GFs/O-BDEM may be an excellent scaffold for constructing enthesis-like graft to patch large/massive RC tears,and provide breakthroughs in fabricating graded interfacial tissue. | Can Chen Qiang Shi Muzhi Li Yang Chen Tao Zhang Yan Xu Yunjie Liao Shulin Ding Zhanwen Wang Xing Li Chunfeng Zhao Lunquan Sun Jianzhong Hu Hongbin Lu | 2022 | Bioactive Materials2022，7，10： | 4 |
| 3 | High Elevation Energy and Water Balance:the Roles of Surface Albedo and Temperature显示文摘Observation and modeling of the coupled energy and water balance is the key to understand hydrospheric and cryospheric processes at high elevation.The paper summarizes the progress to address this aspect in relation with different earth system elements,from glaciers to wetlands.The energy budget of two glaciers,i.e.Xiao Dongkemadi and Parlung No.4,was studied by means of extended field measurements and a distributed model of the coupled energy and mass balance was developed and evaluated.The need for accurate characterization of surface albedo was further documented for the entire Qinghai Tibet Plateau by numerical experiments with Weather Research and Forecast(WRF)on the sensitivity of the atmospheric boundary layer to the parameterization of land surface processes.A new approach to the calibration of a coupled distributed watershed model of the energy and water balance was demonstrated by a case study on the Heihe River Basin in northwestern China.The assimilation of land surface temperature did lead to the retrieval of critical soil and vegetation properties as the soil permeability and the canopy resistance to the exchange of vapour and carbon dioxide.The retrievals of actual Evapo-Transpiration(ET)were generated by the ETMonitor system and evaluated against eddy covariance measurements at sites spread throughout Asia.As regards glacier response to climate variability,the combined findings based on satellite data and model experiments showed that the spatial variability of surface albedo and temperature is significant and controls both glacier mass balance and flow.Experiments with both atmospheric and hydrosphere-cryosphere models documented the need and advantages of using accurate retrievals of land surface albedo to capture lan-atmosphere interactions at high elevation. | Massimo MENENTI Li JIA Marco MANCINI Xin LI Francesca PELLICCIOTTI Kun YANG Jiancheng SHI Maria Jose ESCORIHUELA Chiara CORBARI Shaoting REN Chunfeng MA Chaolei ZHENG Lian LIU Thomas SHAW Baohong DING Wei YANG | 2020 | Journal of Geodesy and Geoinformation Science2020，3，4： | 3 |
| 4 | Array capillary in-tube solid-phase microextraction: A rapid preparation technique for water samples显示文摘 | Xiaohui Yan Dapeng Wu Hong Peng Kun Ding Chunfeng Duan Yafeng Guan | 2012 | Journal of Chromatography A2012，，： | 1 |
| 5 | Studies on threshold pressures of sonoluminescence for bubbles with different noble gases显示文摘The noble gases inside bubbles may have a profound effect on the threshold pressure of sonoluminescence (SL). In this work, the SL threshold pressures have been measured experimentally for bubbles with different noble gases. Results show that the threshold pressure increases with the decrease of molecular mass for gases inside the bubbles. The simulating temperature values at the collapse are almost equal to each other for different gas bubbles at the threshold pressures. However, when the pressure is above the threshold one, the SL mechanism satisfies the bremsstrahlung. On the basis of the experiments and simulations, we found that firstly water molecules dissociate in the process of cavitation and light emission follows; then, the noble gases ionize with the increase of temperature and the bremsstrahlung occurs. SL is a process from molecular emission to bremsstrahlung. | DING Chunfeng XING Da | 2004 | Science China(Physics,Mechanics & Astronomy)2004，47，4： | 0 |
| 6 | Increased N6-methyladenosine is related to the promotion of the methyltransferase METTL14 in ovarian aging显示文摘The ovary is a vital female reproductive organ that functions to produce oocyte gametes and cyclically expressed sex hormones to maintain reproductive capacity and hormone homeostasis.Ovarian aging,characterized by declines in follicle quantity and oocyte quality,leads to premature ovarian failure,premature ovarian insufficiency,or diminished ovarian reserve,thus contributing to female infertility.Distinct gene-expression signatures from RNA transcriptional level and post-transcriptional regulation are relative to oocyte quality and reproductive age. | Chunfeng Qian Zhenxing Liu Yonghong Qian Jie Ding Rulei Chen Han Su Minghong Shen Hong Li Boxian Huang | 2024 | Genes & Diseases2024，11，3： | 0 |
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