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Chinese Journal of Polymer Science 2007年第2期25卷 221-226页

作者： Qian Yang Jing tian Zhi-kang Xu Institute of Polymer Science and Key Laboratory of Macromolecule Synthesis and Functionalization （Ministry of Education） Zhejiang University Hangzhou 310027 China

Ultraviolet （UV）-induced graft polymerization of acrylamide （AAm） on polypropylene substrates was successfully conducted using dibenzyl trithiocarbonate （DBTTC） as photoinitiator. It was confirmed by chemical analysis and surface morphology observation with attenuated total reflectance Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy. A possible mechanism for this graft process was presented, which suggested that, under UV irradiation, the C： S bond in DBTTC could split and abstract a hydrogen from the polypropylene surface and a surface free radical was then formed, and initiated the graft polymerization of AAm.

关键词： Graft polymerization Surface modification Acrylamide Trithiocarbonate UV.

Large Sets and Overlarge Sets of Triangle-Decomposition

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Acta Mathematicae Applicatae Sinica 2007年第1期23卷 123-132页

作者： Zi-hong tian Qing-de kang Institute of Mathematics Hebei Normal University Shijiazhuang 050016 China

There are six types of triangles： undirected triangle, cyclic triangle, transitive triangle, mixed-1 triangle, mixed-2 triangle and mixed-3 triangle. The triangle-decompositions for the six types of triangles have already been solved. For the first three types of triangles, their large sets have already been solved, and their overlarge sets have been investigated. In this paper, we establish the spectrum of LTi（v,λ）, OLTi（v）（i = 1, 2）, and give the existence of LT3（v, λ） and OLT3（v, λ） with λ even.

关键词： Triangle-decomposition large set overlarge set

Experimental investigation of aerodynamics of turbine blade trailing edge cooling

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航空动力学报 2010年第5期25卷 1097-1102页

作者： SUN Da-wei QIAO Wei-yang DONG kang-tian XU Kai-fu School of Power and Energy Northwestern Polytechnical UniversityXi'an 710072China Xi'an Thermal Power Research Institute Xi'an 710032China

This paper presented an experimental investigation the effects of the trailing edge cooling on the aerodynamic performance. The experiments were conducted on the low-speed linear cascade tunnel at Northwestern Polytechnical University. The external aerodynamic characteristics in the 40 percent chord downstream of exit plane were measured using five-hole probe with the different ejection rates. The results showed that the total pressure loss coefficient at the middle spanwise plane increased at first and then it has a decreasing tendency with the increase of ejection ratio. The trailing edge cooling would influence the structure of the turbine cascade outlet flow field. When the ejection rate was 3%,the loss area near the blade endwall would become stronger,but it would become weaker with the 6% ejection ratio. On the whole,the trailing edge cooling had more influence on the profile loss than on the secondary loss.

关键词： turbine blade trailing edge cooling profile loss secondary loss

De-biased knowledge distillation framework based on knowledge infusion and label de-biasing techniques

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Journal of Electronic Science and Technology 2024年第3期22卷 57-68页

作者： Yan Li Tai-kang tian Meng-Yu Zhuang Yu-Ting Sun School of Economics and Management University of Electronic Science and Technology of ChinaChengdu611731China School of Economics and Management Beijing University of Posts and TelecommunicationBeijing100876China School of Electrical Engineering and Computer Science The University of QueenslandBrisbane4072Australia

Knowledge distillation,as a pivotal technique in the field of model compression,has been widely applied across various ***,the problem of student model performance being limited due to inherent biases in the teacher model during the distillation process still *** address the inherent biases in knowledge distillation,we propose a de-biased knowledge distillation framework tailored for binary classification *** the pre-trained teacher model,biases in the soft labels are mitigated through knowledge infusion and label de-biasing *** on this,a de-biased distillation loss is introduced,allowing the de-biased labels to replace the soft labels as the fitting target for the student *** approach enables the student model to learn from the corrected model information,achieving high-performance deployment on lightweight student *** conducted on multiple real-world datasets demonstrate that deep learning models compressed under the de-biased knowledge distillation framework significantly outperform traditional response-based and feature-based knowledge distillation models across various evaluation metrics,highlighting the effectiveness and superiority of the de-biased knowledge distillation framework in model compression.

关键词： De-biasing Deep learning Knowledge distillation Model compression

Amorphous vanadium oxides for electrochemical energy storage

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Nano Research 2023年第7期16卷 9195-9213页

作者： Qian He Zibo Chen Xingyu Niu Xuran Han tian kang Jianyu Chen Yanwen Ma Jin Zhao State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing 210023China

Vanadium oxides have attracted extensive interest as electrode materials for many electrochemical energy storage devices owing to the features of abundant reserves,low cost,and variable *** on the in-depth understanding of the energy storage mechanisms and reasonable design strategies,the performances of vanadium oxides as electrodes for batteries have been significantly *** to crystalline vanadium oxides,amorphous vanadium oxides(AVOs)show many unique properties,including large specific surface area,excellent electrochemical stability,lots of defects and active sites,fast ion kinetics,and high *** review gives a comprehensive overview of the recent progress on AVOs for different energy storage systems,such as alkali metal ion batteries,multivalent ion batteries,and supercapacitors with a special focus on the preparation *** basic mechanisms for energy storage performance improvements of AVOs as compared to their crystalline counterparts are also ***,challenges faced by AVOs are discussed and future development prospects are also *** review aims to provide a comprehensive knowledge of AVOs and is expected to promote the development of high-performance electrodes for batteries.

关键词： amorphous vanadium oxides synthetic methods electrochemical applications batteries supercapacitors

Overview of lethal human coronaviruses

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Signal Transduction and Targeted Therapy 2020年第1期5卷 1672-1687页

作者： Bin Chen Er-kang tian Bin He Lejin tian Ruiying Han Shuangwen Wang Qianrong Xiang Shu Zhang Toufic El Arnaout Wei Cheng Division of Respiratory and Critical Care Medicine State Key Laboratory of BiotherapyWest China Hospital of Sichuan UniversityChengdu 610041China State Key Laboratory of Oral Diseases National Clinical Research Center for Oral DiseasesWest China Hospital of StomatologySichuan UniversityChengdu 610041China Department of Emergency Medicine West China HospitalSichuan UniversityChengdu 610041China Kappa Crystals Ltd. DublinIreland

Coronavirus infections of multiple origins have spread to date worldwide,causing severe respiratory *** coronaviruses that infect humans have been identified:HCoV-229E,HCoV-OC43,HCoV-NL63,HCoV-HKU1,SARS-CoV,MERS-CoV,and *** them,SARS-CoV and MERS-CoV caused outbreaks in 2002 and 2012,***-CoV-2(COVID-19)is the most recently *** has created a severe worldwide outbreak beginning in late 2019,leading to date to over 4 million cases *** are genetically simple,yet highly ***,the recent outbreaks of SARS-CoV and MERS-CoV,and the ongoing outbreak of SARS-CoV-2,indicate that there remains a long way to go to identify and develop specific therapeutic *** after gaining a better understanding of their pathogenic mechanisms can we minimize viral *** paper mainly focuses on SARS-CoV,MERS-CoV,and ***,recent studies are summarized and reviewed,with a focus on virus–host interactions,vaccine-based and drug-targeted therapies,and the development of new approaches for clinical diagnosis and treatment.

关键词： diagnosis respiratory vaccine

Atypical presentation of shoulder brucellosis misdiagnosed as subacromial bursitis:A case report

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World Journal of Clinical Cases 2021年第4期9卷 927-934页

作者： Fu-Sheng Wang Khurram Shahzad Wei-Guo Zhang Jie Li kang tian Department of Bone and Joint First Hospital of Dalian Medical UniversityDalian 116000Liaoning ProvinceChina

BACKGROUND Brucella infections in the shoulder joint are uncommon,and few have been reported in the *** SUMMARY A 26-year-old male was admitted to our hospital with complaint of recurrent pain and limited movement of the right *** patient reported the pain to have first occurred as an isolated event 6 mo previously and to have reoccurred 5 mo later,when it was accompanied by limited movement of the *** from physical examination and magnetic resonance imaging(referred to as MRI)suggested the diagnosis of subacromial bursitis,and diagnostic paracentesis and arthroscopic debridement were ***,synovial fluid culture detected brucella,and the finding was confirmed by mass spectrometry of a colony *** diagnosis was corrected to brucellosis of the shoulder joint,and antibiotic drug treatment(oral rifampicin and doxycycline)was administrated for 6 *** 4-mo postoperative follow-up examination(MRI)yielded normal *** 2-year follow-up showed no signs of *** This rare case of brucellosis infection in shoulder highlights the importance of increasing awareness to help avoid misdiagnosis.

关键词： Shoulder Misdiagnosis Brucellosis Subacromial bursitis Brucella Case report

Effects of AZT and RNA-protein complex (FA-2-b-β) extracted from Liang Jin mushroom on apoptosis of gastric cancer cells

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World Journal of Gastroenterology 2007年第31期13卷 4185-4191页

作者： Yan-Qing Sun Zi-Ren Wang tian-kang Guo Ya-Ming Xi Che Chen, Jin-Wang SchoolofLifeScience.LanzhouUniversity Lanzhou730000GansuProvinceChina DepartmentofSurgery ThePeople′s HospitalofGansuProvinceLanzhou730000GansuProvinceChina DepartmentofHematology FirstAffiliatedHospitalofLanzhouUniversityLanzhou730000GansuProvinceChina ScientificResearch Center GansuCollegeofTraditionalChineseMedicineLanzhou730000GansuProvinceChina DepartmentofHematology LanzhouUniversityLanzhou730000GansuProvinceChina

To investigate the synergistic effects of 3′-azido-3′- deoxythymidine （AZT） and FA-2-b-β extracted from Ling Jin mushroom on apoptosis of gastric cancer cells MKN45 in vitro. METHODS： Ml-I- analysis was made to examine the inhibition rate of MKN45 cells treated with AZT （2.5, 5, 10 and 20 mg/L） and FA-2-b-13 （5, 10, 20 and 40 mg/L） singly and combinatively for 24, 48 and 72 h. Apoptotic effects were evaluated by morphological methods, DNA agarose gel electrophoresis and flow cytometry, respectively. Telomerase activity was estimated by TRAP- ELISA. The mRNA expression of caspase-3 and Bcl-2 were detected by RT-PCR. RESULTS： AZT and FA-2-b-13 could significantly inhibit MKN45 cell proliferation and induce its apoptosis. MKN45 cells were inhibited in dose- and time- dependent manner. The inhibition effect of AZT combined with FA-2- b-β was obviously better than that used singly （0.469 ＋ 0.022 vs 1.075 4- 0.055, P 〈 0.05, 0.325 4- 0.029 vs 0.469 ＋ 0.022 P 〈 0.01）. AZT used singly and combination of FA-2-b-β could decrease the activity of tumor cell telomerase, and AZT has synergistic function with FA- 2-b-β. A certain concentration of AZT could up-regulate the expression of caspase-3 mRNA （r = 0.9969, P 〈 0.01）, which was positively related to apoptosis rate, and could down-regulate the expression of Bcl-2 mRNA, which was negatively related to apoptosis rate （r = 0.926, P 〈 0.01）. Furthermore, the effect of AZT combined with FA-2-b-13 was significantly higher than that used singly. CONCLUSION： Combination of AZT and FA-2-b-β has an obviously synergetic effect in the gastric cancer cells MKN45, which has provided a new approach to the treatment of gastric cancer clinically.

关键词： AZT FA-2-b-β Apoptosis Telomerase Bcl-2 Caspase-3 MKN45 cell

Coseismic vertical deformation of the M_S8.0 Wenchuan earthquake from repeated levelings and its constraint on listric fault geometry

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Earthquake Science 2009年第6期22卷 595-602页

作者： Qingliang Wang Duxin Cui Xi Zhang Wenping Wang Jinwen Liu kang tian Zhaoshan Song Second Monitoring Center China Earthquake Administration Xi'an 710054 China First Monitoring Center China Earthquake Administration Tianjin 300180 China

The devastating Ms8.0 Wenchuan earthquake ruptured two large parallel thrust faults along the middle segment of the Longmenshan thrust belt. Preseismic and postseismic leveling data indicated the hanging wall of the Yingxiu-Beichuan-Nanba thrust fault mainly presented coseismic uplift with respect to the reference point at Pingwu county town, and the observed maximum uplift of 4.7 m is located at Beichuan county （Qushan town） which is about 100 m west of the fault scarp. The foot wall of the Yingxiu-Beichuan-Nanba thrust fault mainly showed subsidence with maximum subsidence of 0.6 m near the rupture. By employing a listric dislocation model, we found that the fault geometry model of exponential dip angle δ=88°×[1-exp（-9/h）] with depth of 18 km and uniform thrust-slip of 5.6 m could fit the observed coseismic vertical deformation very well, which verifies the listric thrust model of the Longmenshan orogenic zone.

关键词： Wenchuan earthquake leveling vertical deformation listric faulting

Effect of Farming Practices on the Variability of Phosphorus Status in Intensively Managed Soils

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Pedosphere 2015年第3期25卷 438-449页

作者： SUN Wei-Xia HUANG Biao QU Ming-Kai tian kang YAO Li-Peng FU Ming-Ming YIN Li-Ping Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of Sciences Soil and Fertilizer Technology Extension Center Bureau of Agriculture of Rugao County

Phosphorus(P) in agricultural soils is an important factor for soil quality and environmental protection. Understanding of P and its fractions in soils on a regional scale is imperative for effective management or utilization of P and the improvement of P availability in soils. To study spatial variability and changes of soil P and its fractions as affected by farming practices, soil samples were taken in Rugao County, Jiangsu Province of China, an intensive agricultural area in the Yangtze River Delta region, in years of 1982(n = 1 514), 1997(n = 1 651), and 2002(n = 342). High spatial variabilities of Olsen P and total P(TP) were observed throughout the study area. Loamy Stagnic Anthrosols and clay or loamy Aquic Cambosols had significantly higher concentrations of Olsen P and TP than sandy Ustic Cambosols and Aquic Cambosols. Olsen P and TP were increased from 1982 to 2002. The accumulations of Olsen P and TP in the cultivated soils were likely related to the increased application of P fertilizer, organic input,and soil incorporation of crop residues as well as conversion of soil use. Accumulated soil P was dominantly in labile and semi-labile P fractions. These P fractions may be utilized by future crop production by adjusting management practices, but they also pose a serious threat to nearby water bodies. Future strategies should include decreasing P fertilization in soils and supporting sustainable management. The information from this study can be used to monitor changes in soil fertility and environmental risks so that the use of fertilizers can become more rational.

关键词： agriculture management Olsen phosphorus phosphorus availability phosphorus fractionation total phosphorus