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| 1 | Dynamic Calibration of the Cutting Temperature Sensor of NiCr/NiSi Thin-film Thermocouple显示文摘In high-speed cutting, natural thermocouple, artificial thermocouple and infrared radiation temperature measurement are usually adopted for measuring cutting temperature, but these methods have difficulty in measuring transient temperature accurately of cutting area on account of low response speed and limited cutting condition. In this paper, NiCr/NiSi thin-film thermocouples(TFTCs) are fabricated according to temperature characteristic of cutting area in high-speed cutting by means of advanced twinned microwave electro cyclotron resonance(MW-ECR) plasma source enhanced radio frequency(RF) reaction non-balance magnetron sputtering technique, and can be used for transient cutting temperature measurement. The time constants of the TFTCs with different thermo-junction film width are measured at four kinds of sampling frequency by using Ultra-CFR short pulsed laser system that established. One-dimensional unsteady heat conduction model is constructed and the dynamic performance is analyzed theoretically. It can be seen from the analysis results that the NiCr/NiSi TFTCs are suitable for measuring transient temperature which varies quickly, the response speed of TFTCs can be obviously improved by reducing the thickness of thin-film, and the area of thermo-junction has little influence on dynamic response time. The dynamic calibration experiments are made on the constructed dynamic calibration system, and the experimental results confirm that sampling frequency should be larger than 50 kHz in dynamic measurement for stable response time, and the shortest response time is 0.042 ms. Measurement methods and devices of cutting heat and cutting temperature measurement are developed and improved by this research, which provide practical methods and instruments in monitoring cutting heat and cutting temperature for research and production in high-speed machining. | CUI Yunxian YANG Deshun JIA Ying ZENG Qiyong SUN Baoyuan | 2011 | Chinese Journal of Mechanical Engineering2011，24，1： | 15 |
| 2 | Effect of six flavonoid compounds from Ixeris sonchifolia on stimulus-induced superoxide generation and tyrosyl phosphorylation in human neutrophils显示文摘 | Jincai Lu Xizhi Feng Qishi Sun Huangwei Lu Masanobu Manabe Kazunori Sugahara Deshun Ma Yasuhiro Sagara Hiroyuki Kodama | 2002 | Clinica Chimica Acta2002，，1： | 1 |
| 3 | One-step fabrication of cell sheet-laden hydrogel for accelerated wound healing显示文摘Full-thickness skin wounds are have continued to be reconstructive challenges in dermal and skin appendage regeneration, and skin substitutes are promising tools for addressing these reconstructive procedures. Herein, the one-step fabrication of a cell sheet integrated with a biomimetic hydrogel as a tissue engineered skin for skin wound healing generated in one step is introduced. Briefly, cell sheets with rich extracellular matrix, high cell density, and good cell connections were integrated with biomimetic hydrogel to fabricate gel + human skin fibroblasts (HSFs) sheets and gel + human umbilical vein endothelial cells (HUVECs) sheets in one step for assembly as a cell sheet-laden hydrogel (CSH). The designed biomimetic hydrogel formed with UV crosslinking and ionic crosslinking exhibited unique properties due to the photo-generated aldehyde groups, which were suitable for integrating into the cell sheet, and ionic crosslinking reduced the adhesive force toward the substrate. These properties allowed the gel + cell sheet film to be easily released from the substrate. The cells in the harvested cell sheet maintained excellent viability, proliferation, and definite migration abilities inside the hydrogel. Moreover, the CSH was implanted into a full-thickness skin defects to construct a required dermal matrix and cell microenvironment. The wound closure rate reached 60.00 ± 6.26% on the 2nd day, accelerating mature granulation and dermis formation with skin appendages after 14 days. This project can provide distinct guidance and strategies for the complete repair and regeneration of full-thickness skin defects, and provides a material with great potential for tissue regeneration in clinical applications. | Huijuan Wang Deshun Sun Weiming Lin Chao Fang Kui Cheng Zhengzhou Pan Daping Wang Zhangfa Song Xiaojun Long | 2023 | Bioactive Materials2023，，10： | 0 |
| 4 | Forestry development to reduce poverty and improve the environment显示文摘Poverty reduction is a world-wide concern.At the end of 2017,according to the rural poverty standard in China,there were 30.46 million poor in China.However,complete poverty alleviation by the end of 2020 had been achieved.This is significant and complicated,especially as poverty-stricken areas and ecologically fragile areas overlap.During the process of poverty alleviation,the development of forestry projects was not only conducive to improving the environment but also an important way to reduce poverty.Therefore,based on an analysis of the causes of poverty-stricken areas,this study examined successful cases in different regions and proposed ways to promote economic growth:providing state subsidies for tree planting and forest maintenance;developing undergrowth economy;and/or initiating an industrial chain.It also introduces principles to promote forestry progress,according to local conditions,keeping a balance between economic development and the environment.This study provides effective ways to promote forestry development and rural poverty alleviation. | Rongjia Wang Jianfeng Zhang Tonggui Wu Shiyong Sun Zongtai Li Deshun Zhang | 2022 | Journal of Forestry Research2022，33，6： | 0 |
| 5 | Exploring High-Performance Architecture for Data Center Networks显示文摘As a critical infrastructure of cloud computing,data center networks(DCNs)directly determine the service performance of data centers,which provide computing services for various applications such as big data processing and artificial intelligence.However,current architectures of data center networks suffer from a long routing path and a low fault tolerance between source and destination servers,which is hard to satisfy the requirements of high-performance data center networks.Based on dual-port servers and Clos network structure,this paper proposed a novel architecture RClos to construct high-performance data center networks.Logically,the proposed architecture is constructed by inserting a dual-port server into each pair of adjacent switches in the fabric of switches,where switches are connected in the form of a ring Clos structure.We describe the structural properties of RClos in terms of network scale,bisection bandwidth,and network diameter.RClos architecture inherits characteristics of its embedded Clos network,which can accommodate a large number of servers with a small average path length.The proposed architecture embraces a high fault tolerance,which adapts to the construction of various data center networks.For example,the average path length between servers is 3.44,and the standardized bisection bandwidth is 0.8 in RClos(32,5).The result of numerical experiments shows that RClos enjoys a small average path length and a high network fault tolerance,which is essential in the construction of high-performance data center networks. | Deshun Li Shaorong Sun Qisen Wu Shuhua Weng Yuyin Tan Jiangyuan Yao Xiangdang Huang Xingcan Cao | 2023 | Computer Systems Science & Engineering2023，46，7： | 0 |
| 6 | Stratigraphy and Zircon Provenance of a Late Paleoproterozoic Terrestrial Sequence underlying the Xiong'er Volcanics in the Southern North China Craton显示文摘The late Paleoproterozoic Dagushi Formation comprises a fluvial-lacustrine succession and represents the initial fill of the Xiong'er Basin in the southern North China Craton.Employing integrated outcrop surveys and detrital zircon UPb-Hf dating,this study examines the provenance and depositional setting of the Dagushi Formation.Five major depositional facies,including braided channel,distributary channel,subaqueous stream/mouth bar,pro-delta and shallow lake,were identified,based on lithofacies and associations.They were interpreted as representing a braided river deltalacustrine system.The ages of the last metamorphic event of the basement,covering volcanics and the youngest zircon together constrain a depositional age of ca.1.79 Ga for the Dagushi Formation.Zircon age distributions reveal a provenance change from ca.2.7–2.5 Ga rocks in the lower part,to ca.2.3–1.9 Ga sources in the middle-upper part of the Dagushi Formation.Considering the vertical sedimentology,this provenance change could be induced by the rising water-level caused by a tectonic subsidence.The ca.2.7–2.5 Ga zircons are suggested to be locally sourced from the late Neoarchean–Paleoproterozoic metamorphic basement.The northeast Zhongtiao Mts area(current co-ordinates)is supposed to have appeared as a paleo-uplift and served as a source area for the Paleoproterozoic grains.The Dagushi Formation records an early‘underfilled'stage of the Xiong'er Rift. | SUN Fengbo ZHENG Deshun ZUO Pengfei LIU Weiqing | 2022 | Acta Geologica Sinica(English Edition)2022，96，5： | 0 |
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