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Prediction of Grinding Force by an Electroplated Grinding Wheel with Orderly-Micro-Grooves

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Chinese Journal of Mechanical Engineering 2023年第4期36卷 56-66页

作者： Cong mao Jiali Wang Mingjun Zhang Xincheng Wang Yuanqiang Luo Weidong Tang Kun Tang Zhuming bi Yongle Hu Zhenheng Lin Hunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High-performance Mechanical Equipment Changsha University of Science and TechnologyChangsha 410114China Hunan Wuxin Intelligence Technology Co. LtdChangsha 410199China Department of Civil and Mechanical Engineering Purdue University Fort WayneFort WayneIN 46805USA School of Mechanical and Electrical Engineering Putian UniversityPutian 351100China

The ability to predict a grinding force is important to control,monitor,and optimize the grinding *** theoretical models were developed to predict grinding forces when a structured wheel was used in a grinding *** paper aimed to establish a single-grit cutting force model to predict the ploughing,friction and cutting forces in a grinding *** took into the consideration of actual topography of the grinding wheel,and a theoretical grinding force model for grinding hardened AISI 52100 by the wheel with orderly-micro-grooves was *** model was innovative in the sense that it represented the random thickness of undeformed chips by a probabilistic expression,and it reflected the microstructure characteristics of the structured wheel *** that the microstructure depended on the randomness of the protruding heights and distribution density of the grits over the *** proposed force prediction model was validated by surface grinding experiments,and the results showed(1)a good agreement of the predicted and measured forces and(2)a good agreement of the changes of the grinding forces along with the changes of grinding parameters in the prediction model and *** research proposed a theoretical grinding force model of an electroplated grinding wheel with orderly-micro-grooves which is accurate,reliable and effective in predicting grinding forces.

关键词： Electroplated grinding wheel Orderly-micro-grooves Grinding force Force prediction Undeformed chip thickness Experimental validation

Decellularized optic nerve functional scaffold transplant facilitates directional axon regeneration and remyelination in the injured white matter of the rat spinal cord

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Neural Regeneration Research 2021年第11期16卷 2276-2283页

作者： Yu-Rong Bai bi-Qin Lai Wei-Tao Han Jia-Hui Sun Ge Li Ying Ding Xiang zeng Yuan-Huan Ma Yuan-Shan zeng Key Laboratory for Stem Cells and Tissue Engineering Ministry of EducationSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Department of Histology and Embryology Zhongshan School of MedicineSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Co-innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina Institute of Spinal Cord Injury Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Guangdong Provincial Key Laboratory of Brain Function and Disease Zhongshan School of MedicineSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Axon regeneration and remyelination of the damaged region is the most common repair strategy for spinal cord ***,achieving good outcome remains *** previous study showed that porcine decellularized optic nerve better mimics the extracellular matrix of the embryonic porcine optic nerve and promotes the directional growth of dorsal root ganglion ***,it has not been reported whether this material promotes axonal regeneration in *** the present study,a porcine decellularized optic nerve was seeded with neurotrophin-3-overexpressing Schwann *** functional scaffold promoted the directional growth and remyelination of regenerating *** vitro,the porcine decellularized optic nerve contained many straight,longitudinal channels with a uniform distribution,and microscopic pores were present in the channel *** spatial micro topological structure and extracellular matrix were conducive to the adhesion,survival and migration of neural stem *** scaffold promoted the directional growth of dorsal root ganglion neurites,and showed strong potential for myelin ***,we transplanted the porcine decellularized optic nerve containing neurotrophin-3-overexpressing Schwann cells in a rat model of T10 spinal cord defect in *** weeks later,the regenerating axons grew straight,the myelin sheath in the injured/transplanted area recovered its structure,and simultaneously,the number of inflammatory cells and the expression of chondroitin sulfate proteoglycans were ***,these findings suggest that porcine decellularized optic nerve loaded with Schwann cells overexpressing neurotrophin-3 promotes the directional growth of regenerating spinal cord axons as well as myelin *** procedures involving animals were conducted in accordance with the ethical standards of the Institutional Animal Care and Use Committee of Sun Yat-sen University(approval ***-IACUC-2019-B034)on February 28,2019.

关键词： axonal regeneration decellularized optic nerve directional regeneration functional scaffold microenvironment neurotrophin-3 optic nerve remyelination Schwann cells tissue engineering white matter injury

Inflammatory pseudotumor-like follicular dendritic cell sarcoma: A brief report of two cases

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World Journal of Gastrointestinal Oncology 2019年第12期11卷 1231-1239页

作者： bi-Xi Zhang Zhi-Hong Chen Yu Liu Yuan-Jun zeng Yan-Chun Li Department of Pathology People’s Hospital of Hunan Province

BACKGROUND Follicular dendritic cell(FDC)sarcoma/tumor is a rare malignant tumor of follicular dendritic cells,which is considered a low-grade sarcoma that can involve lymph nodes or extranodal *** FDC sarcomas are negative for Epstein-Barr virus(EBV),whereas the inflammatory pseudotumorlike variant consistently shows EBV in the neoplastic *** SUMMARY We report two cases of inflammatory pseudotumor-like FDC sarcoma in the liver that received 3D laparoscopic right hepatectomy and open right hepatectomy *** EBV probe-based in situ hybridization and detection of immunohistochemical markers of FDC play an important role in the diagnosis and differential diagnosis of inflammatory pseudotumor-like FDC *** surgical excision combined with regional lymphadenectomy may be effective in reducing the postoperative recurrence and metastasis and improving long-term survival rates.

关键词： Inflammatory pseudotumor-like follicular dendritic cell sarcoma Epstein-Barr virus Liver Spleen Case report

The effects of proton irradiation on the electrical properties of NbAlO/AlGaN/GaN MIS-HEMT

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Science China(Physics,Mechanics & Astronomy) 2012年第1期55卷 40-43页

作者： bi ZhiWei FENG Qian ZHANG JinCheng LU Ling mao Wei GU WenPing MA XiaoHua HAO Yue Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices School of Microelectronics Xidian University Xi＇an 710071 China

AlGaN/GaN metal-insulator-semiconductor high electron-mobility transistors （MIS-HEMTs） with atomic layer deposited （ALD） NbA10 gate dielectric were investigated using 3 MeV proton irradiation at a fluence of 1015 p/crn2. It was found that the proton irradiation damage caused degradation in DC performance and a flatband voltage shift in the capacitance-voltage curve. Gate-drain conductance measurements indicated that new traps were introduced in GaN from the irradiation, and the trap densities increased from 1.18×10^12 ***-1 to 1.82×10^12 ***-1 in MIS-HEMTs after irradiation. However, these increases in trap densities caused by irradiation in MIS-HEMT are less than those in HEMT, which can be attributed to the protection of the A1GaN surface by the NbA10 dielectric layer.

关键词： AIGaN/GaN MIS-HEMT proton irradiation trap

Dual-doping for enhancing chemical stability of functional anionic units in sulfide for high-performance all-solid-state lithium batteries

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Journal of Energy Chemistry 2023年第11期86卷 382-390,I0009页

作者： Peiwen Yu Niaz Ahmad Jie Yang Chaoyuan zeng Xiaoxiao Liang Weiming Huang Mei Ni Pengcheng mao Wen Yang Key Laboratory of Cluster Science of Ministry of Education Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China Analysis&Testing Center Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228HainanChina Department of Basic Courses China Fire and Rescue InstituteBeijing 102202China College of Chemistry Jilin UniversityChangchun 130012JilinChina Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education Jilin UniversityChangchun 130012JilinChina Southern Marine Science and Engineering Guangdong Lab(Zhanjiang) Zhanjiang 524002GuangdongChina

The sulfide-based solid-state electrolytes(SEs)reactivity toward moisture and Li-metal are huge barriers that impede their large-scale manufactu ring and applications in all-solid-state lithium batteries(ASSLBs).Herein,we proposed an Al and O dual-doped strategy for Li_(3)PS_(4)SE to regulate the chemical/electrochemical stability of anionic PS_(4)^(3-)tetrahedra to mitigate structural hydrolysis and parasitic reactions at the SE/Li *** optimized Li_(3.08)A_(10.04)P_(0.96)S_(3.92)O_(0.08)SE presents the highestσLi+of 3.27 mS cm^(-1),which is~6.8 times higher than the pristine Li_(3)PS_(4)and excellently inhibits the structural hydrolysis for~25 min@25%humidity at *** calculations confirmed that the enhanced chemical stability was revealed to the intrinsically stable entities,e.g.,***,Li_(3.08)Al_(0.04)P_(0.96)S_(3.92)O_(0.08)SE cycled stably in Li//Li symmetric cell over 1000 h@0.1 mA cm^(-2)/0.1 mA h cm^(-2),could be revealed to Li-Al alloy and Li_(2)Oat SE/Li interface impeding the growth of Li-dendrites during ***,LNO@LCO/Li_(3.08)Al_(0.04)P_(0.96)S_(3.92)O_(0.08)/Li-In cell delivered initial discharge capacities of 129.8 mA h g^(-1)and 83.74%capacity retention over 300 cycles@0.2 C at ***,the Li_(3.08)Al_(0.04)P_(0.96)S_(3.92)O_(0.08)SE presented>90%capacity retention over 200 and 300 cycles when the cell was tested with LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2)(NCA)cathode material vs.5 and 10 mg cm^(-2)@RT.

关键词： Dual doping High Li^(+) conductivity Air-stability Pos_(3)^(3-) functional units Stable SE/electrode interface

Effect of dietary supplementation with mulberry(Morus alba L.) leaves on the growth performance,meat quality and antioxidative capacity of finishing pigs

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Journal of Integrative Agriculture 2019年第1期18卷 143-151页

作者： zeng Zhu JIANG Jun-jie YU Jie mao Xiang-bing YU bing CHEN Dai-wen Key Laboratory for Animal Disease-Resistant Nutrition Ministry of Education/Institute of Animal NutritionSichuan Agricultural University

The present study was conducted to evaluate the effect of dietary mulberry(Morus alba L.) leaves powder(MLP) supplementation on meat quality of finishing pigs.A total of 40 Duroc×Landrace×Yorkshire pigs(initial body weight of(40.5±0.63) kg) were randomly allotted into two treatments,fed either with control diet or 15% MLP diet for 85 *** results showed that MLP diet decreased(P≤0.05) average daily gain(ADG) and increased(P<0.05) feed/gain ratio(F/G) in the finishing and whole *** diet also decreased(P<0.05) carcass weight,dressing percentage,last rib and average backfat ***,MLP diet increased(P<0.05) intramuscular fat(IMF) content,decreased(P<0.05) shear force,cooking loss and drip *** addition,MLP diet increased(P<0.05) total antioxidative capacity,glutathione peroxidase and tended(P<0.10) to increase total superoxide dismutase in *** longissimus thoracis,myosin heavy chain(MyHC) I and IIa mRNA levels were increased(P≤0.05) for MLP *** conclusion,15% MLP supplementation reduced the growth performance and carcass traits,but improved meat quality of finishing pigs possibly through the change of myofiber characteristics,enhancement of antioxidative capacity and increase of IMF.

关键词： mulberry leaves powder meat quality myofibers antioxidation pigs

Development and high-gradient test of a two-half accelerator structure

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Nuclear Science and Techniques 2021年第6期32卷 54-62页

作者： mao-mao Peng Jia-Ru Shi Hao Zha Xian-Cai Lin Ze-Ning Liu Yu-Liang Jiang Jian Gao Liu-Yuan Zhou Fo-Cheng Liu Xiang-Cong Meng Huai-bi Chen Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle and Radiation Imaging Tsinghua UniversityMinistry of EducationBeijing 100084China

This paper reports on the design,fabrication,RF measurement,and high-power test of a prototype accelerator—such as 11.424 GHz with 12 cells—and a traveling wave of two *** was found that the unloaded gradient reached 103 MV/m during the high-power test and the measured breakdown rate,after 3.17×10^(7) pulses,was 1.62×10^(-4)/pulse/m at 94 MV/m and a 90 ns pulse *** thus concluded that the high-gradient two-half linear accelerator is cost-effective,especially in high-frequency RF linear ***,we suggest that silverbased alloy brazing can further reduce costs.

关键词： Two-half structure Silver-based alloy brazing Low cost High gradient

Ultrasound-assisted synthesis and preliminary bioactivity of novel 2H-1,2,4-thiadiazolo[2,3-a]pyrimidine derivatives containing fluorine

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Chinese Chemical Letters 2012年第5期23卷 561-564页

作者： mao Rong Wang Lin Jiang Shao Fang Zhou Ze Yuan Zhang zeng Chen Ji College of Chemistry and Material Science Shandong Agricultural UniversityTai'an 271018China

Eight novel 5,7-disubstituted-2-{5-methyl-3-（4-trifluoromethylphenyl）isoxazol-4-ylcarbonylimino}-2H-1,2,4-thiadiazolo[2,3- a]pyrimidines were synthesized by multi-step reactions in yields 68-85%.Reactions were carried out either by ultrasound irradiation or conventional method,and found it was faster and more efficient under ultrasonic *** herbicidal activities against Echinochloa crus-galli,Digitaria sanguinalis and Chenopodium serotinum were also evaluated by flat-utensil method,and the results indicated that the target compounds exhibited significant activities,some were even higher than the control herbicide.

关键词： 2H-1 2 4-Thiadiazolo[2 3-a]pyrimidine Synthesis Ultrasound bioactivity

An ESIPT-based NIR-fluorescent probe for exosome labeling and in situ imaging

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Chinese Chemical Letters 2023年第11期34卷 220-224页

作者： Jipeng Ding Runsha Xiao Anyao bi Guanyang Chen Nengwei Zhang Zihua Chen Xueping Feng Wenbin zeng Xiangya School of Pharmaceutical Sciences Central South UniversityChangsha 410013China Department of Gastrointestinal Surgery Hunan Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal TumorXiangya HospitalCentral South UniversityChangsha 410013China Institute of Medical Sciences Xiangya HospitalCentral South UniversityChangsha 410013China Peking University Ninth School of Clinical Medicine(Beijing Shijitan Hospital Capital Medical University)Beijing 100038China

Exosomes play significant roles in physiological and tumorigenic processes and it is desirable to visualize and track the ***,a novel amphiphilic fluorescent probe HBT-Exo based on excited-state intramolecular proton transfer(ESIPT)mechanism is reported for *** ESIPT characteristics were confirmed by both theory calculation and experimental observation,which enable the probe to show a large Stokes shift as well as near-infrared(NIR)keto-form ***-Exo displayed excellent biocompatibility and remarkable efficiency for exosome-labeling in gastric cancer ***,the labeled exosomes were successfully applied for the real-time in situ imaging in mouse models.

关键词： Exosome Fluorescent probe Excited state intramolecular proton transfer Gastric cancer bioimaging