检索结果-南通市图书馆

Fretting wear behaviour of high-nitrogen stainless bearing steel under lubrication condition

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2020年第7期27卷 849-866页

作者： huan lin Mao-sheng Yang Bai-po Shu College of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina Institute for Special Steel Central Iron and Steel Research InstituteBeijing 100081China

The fretting wear performance of high-nitrogen stainless bearing steel(40Cr15Mo2VN)under lubrication conditions was ***-based grease was preparedusing MoS2 and carbon nanotubes(CNTs)as *** 52100 steel ball was used in four-ball test to evaluate the extreme pressure property and wear resistance of *** four-ball test,the grease adding 0.8 mass%MoS2 and 0.8 mass%CNTs,respectively,was chosen and used for fretting *** 52100 ball and 40Cr15Mo2VN steel disc were used as the upper and lower samples for fretting *** results showed that wear power consumption increased with the increase in both sliding velocity and contact *** initial contact stress was 2.047 GPa,the main wear mechanisms were abrasive wear and plastic deformation as the velocity increased 0.028 to 0.112 m/*** the velocity was 0.028 m/s,the main wear mechanisms changed abrasive wear to adhesion wear and finally to abrasive wear and adhesion wear as the initial contact stress increased 1.788 to 2.579 *** volume loss grew sharply becaof the changes in wear *** this condition,the volume loss growth rate can be divided into three regions according to different wear power consumption ranges corresponding to different wear mechanisms.

关键词： High-nitrogen steel Sliding velocity Contact stress Adhesion wear Abrasive wear Wear power consumption

QoS multicast routing scheme using QGA in IP/DWDM networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 95-100页

作者： XING huan-lai BAI lin JI Yue-feng Key Laboratory of Optical Communications and Lightwave Techno ogies Beijing University of Posts and Telecommunications Beijing 100876 China

This article studies multi-constraints least-cost multicast routing problem in internet protocol over dense wavelength division multiplexing （IP/DWDM） networks. To address this problem, an individual-difference-based quantum genetic algorithm （IDQGA） is proposed. This algorithm considers individual differences among chromosomes by introducing an adaptive rotation angle step determination scheme and a grouping-based quantum mutation operation. Simulations are conducted over network topologies. The results indicate that compared with other heuristic algorithms, IDQGA has better optimal performance on solving quality of service （QoS） multicast routing problem in IP/DWDM networks and is characterized by strong robustness, high success ratio and excellent capability on global searching.

关键词： IP-over-DWDM multicast QoS quantum genetic algorithm

Dithienylmaleimide-based D-A Conjugated Polymer Film:Photo-responsive Behavior and Application in Electrical Memory and Logic Gates

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2021年第9期39卷 1177-1184页

作者： Wei Lv Chun Wang Xing-Chi lin Xiao-Fei Mei Wen Wang E Yang Qi-Dan ling Zheng-huan lin College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China Fujian Provincial Key Laboratory of Polymer Materials Fujian Normal UniversityFuzhou 350007China

Solid-stated smart polymers responsive to external stimuli have attracted much attention for potential application in the field of photoelectron devices,logic gates,sensor,data storage and ***,it is a bigger challenge for polymers than that for small molecules in solid state to acquire stimuli-responsive properties,because polymers with high molecular weight are not as easy to change the packing structure as small molecules under external ***,a D-A type alternating copolymer PTMF-o containing 3,4-bisthienylmaleimide(A unit)and fluorene(D unit)is designed and *** irradiation of sunlight,PTMF-o film exhibits a photo-response with the color altering from purple to *** is attributed to the structure of copolymer transformed from ring-opening form(PTMF-o)to ring-closure form(PTMF-c),resulting from the oxidative photocyclization of 3,4-bisthienylmaleimide ***,the ability of charge transfer(CT)from fluorene to 3,4-bisthienylmaleimide unit in PTMF-o can be easily weakened by light ***-o film displays a WORM-type resistive storage performance for the strong ***,after exposure,the electrical memory behavior in situ transfers into FLASH type,due to weak CT in ***-o film can also be employed as smart material to construct NAND and NOR logic gates by using light as input *** work provides a simple way to modify the electronic properties of polymers and realize stimuli-response in solid states.

关键词： Dithienylmaleimide Photo-response Electrical memory Logic gate

Mechanism and Prevention of Disintegration of AOD Stainless Steel Slag

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2013年第4期20卷 26-30页

作者： ZHAO Hai-quan QI Yuan-hong SHI Yong-lin NA Xian-zhao FENG huan-lin State Key Laboratory of Advanced Steel Processing and Materials Central Iron and Steel Research Institute Technology Centre Taiyuan Iron and Steel(Group)Co.Ltd.

During the cooling process of AOD（argon-oxygen decarburization）stainless steel slag,the serious disintegrating problem happened,which will cause serious environmental *** disintegrating mechanism of the AOD slag was analyzed in detail,and experimental research on prevention of disintegrating of AOD stainless steel slag was developed by adjusting the basicity of the slag and adding the quartz sand and *** disintegrating problem during the cooling process of AOD stainless steel slag is caused by the 2CaO·SiO2phase transformation fromα＇-C2S toγ-*** means of adjusting the basicity of the AOD stainless steel slag from 2to 1.5by adding quartz sand,disintegrating of slag was *** the adding amount must arrive at 15% which increases the difficulty of *** of AOD stainless steel slag can be effectively controlled by adding borax,and the adding amount is only 0.5%-0.8%.This method can be easily industrialized.

关键词： AOD stainless steel slag disintegration modification treatment

Risk factors for local recurrence of middle and lower rectal carcinoma after curative resection

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2008年第30期14卷 4805-4809页

作者： Ze-Yu Wu Jin Wan Gang Zhao lin Peng Jia-lin Du Yuan Yao Quan-Fang Liu Hua-huan lin Department of General Surgery Guangdong Provincial People's Hospital Guangzhou 510080 Guangdong Province China Department of Pathology Guangdong Provincial People's Hospital Guangzhou 510080 Guangdong Province China

AIM： To explore the risk factors for local recurrence of middle and lower rectal carcinoma after curative resection. METHODS： Specimens of middle and lower rectal carcinoma from 56 patients who received curative resection at the Department of General Surgery of Guangdong Provincial People＇s Hospital were studied. A large slice technique was used to detect mesorectal metastasis and evaluate circumferential resection margin status. The relations between clinicopathologic characteristics, mesorectal metastasis and circumferential resection margin status were identified in patients with local recurrence of middle and lower rectal carcinoma. RESULTS： Local recurrence of middle and lower rectal carcinoma after curative resection occurred in 7 of the 56 patients （12.5%）, and was significantly associated with family history （Х^2= 3.929, P = 0.047）, high CEA level （Х^2 = 4.964, P = 0.026）, cancerous perforation （Х^2 = 8.503, P = 0.004）, tumor differentiation （Х^2 = 9.315, P = 0.009） and vessel cancerous emboli （Х^2 = 11.879, P = 0.001）. In contrast, no significant correlation was found between local recurrence of rectal carcinoma and other variables such as age （Х^2 = 0.506, P = 0.477）, gender （Х^2 = 0.102, Z2 = 0.749）, tumor diameter （Х^2 = 0.421, P = 0.516）,tumor infiltration （Х^2 = 5.052, P = 0.168）, depth of tumor invasion （Х^2 = 4.588, P = 0.101）, lymph node metastases （Х^2 = 3.688, P = 0.055） and TNM staging system （Х^2 = 3.765, P = 0.152）. The local recurrence rate of middle and lower rectal carcinoma was 33.3% （4/12） in patients with positive circumferential resection margin and 6.8% （3/44） in those with negative circumferential resection margin. There was a significant difference between the two groups （Х^2 = 6.061, P = 0.014）. Local recurrence of rectal carcinoma occurred in 6 of 36 patients （16.7%） with mesorectal metastasis, and in 1 of 20 patients （5.0%） without mesorectal metastasis. However, there was no significant difference between the two groups （Х^2 = 1.6

关键词： Middle and lower rectal carcinoma Local recurrence Circumferential resection margin Mesorectal metastasis

Cohesive Soil Stabilized Using Sewage Sludge Ash/Cement and Nano Aluminum Oxide

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Transportation Science and Technology 2012年第1期1卷 83-99页

作者： huan-lin Luo Da-Hung Hsiao Deng-Fong lin Cong-Kai lin Department of Civil and Ecological Engineering I-Shou University1section 1Hsueh-Cheng Rd.Dashu DistrictKaohsiung City 84001R.O.C. Department of Civil Engineering and Institute of Civil Engineering and Mitigating Technology of Disasters National Kaohsiung University of Applied Science415 Chien Kung RoadKaohsiung 807TaiwanR.O.C.

In order to improve soft soil strength,a mixture of incinerated sewage sludge ash(SSA)and cement was applied as a soil *** intended mix ratio for SSA and cement was 3:1.A-6 clay was selected as the untreated *** this study,15%of clay soil was replaced by SSA/cement to produce the treated soil ***,four different volumes,namely 0,1,2,and 3%,of nano-Al_(2)O_(3) were mixed with the treated soil as an *** such as compaction,pH values,Atterberg limits,unconfined compressive strength(UCS),swell potential,California bearing ratio(CBR),and permeability were *** results indicate that both UCSs and CBR values of untreated soil were greatly improved by the use of 15%SSA/***,a 1%addition of nano-Al_(2)O_(3) enhanced the treated soil in terms of both UCS and CBR ***,the swell potential was effectively reduced by the use of 15%SSA/cement as compared with untreated soil and the 1%nano-Al_(2)O_(3) additive fraction offered the best *** this study,we conclude that 15%of SSA/cement replacement could effectively stabilize A-6 clay soil,and 1%of nano-Al_(2)O_(3) additive may be the optimum amount to add to the soil.

关键词： soil additive optimum

Efficacy of a novel endotoxin adsorber polyvinylidene fluoride fiber immobilized with L-serine ligand on septic pigs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第4期12卷 264-272页

作者： Jian-ping GAO Man huanG Ning LI Peng-fei WANG huan-lin CHEN Qiu-ping XU Critical Care Department Sir Run Run Shaw Hospital School of Medicine Zhejiang University Hangzhou 310016 China Department of Chemical and Biochemical Engineering Zhejiang University Hangzhou 310027 China

A novel adsorber,polyvinylidene fluoride matrix immobilized with L-serine ligand (PVDF-Ser),was developed in the present study to evaluate its safety and therapeutic efficacy in septic pigs by extracorporeal *** adsorption efficiency (EAE) of the adsorber was firstly measured in *** biocompatibility and hemodynamic changes during extracorporeal circulation were then *** half of 16 pigs receiving lipopolysaccharide (Escherichia coli O111:B4,5 μg/kg) intravenously in 1 h were consecutively treated by hemoperfusion with the new adsorber for 2 *** changes of circulating endotoxin and certain cytokines and respiratory function were *** 72 h-survival rate was assessed *** reached 46.3% (100 EU/ml in 80 ml calf serum) after 2 *** deleterious effect was observed within the *** plasma endotoxin,interleukin-6 (IL-6),and tumor necrosis factor-α (TNF-α) levels were decreased during the *** oxygenation was also improved during and after the ***,the survival time was significantly extended (>72 h vs.47.5 h for median survival time).The novel product PVDF-Ser could adsorb endotoxin with high safety and *** use of extracorporeal hemoperfusion with the new adsorber could reduce the levels of circulating endotoxin,IL-6,and TNF-α,besides improve respiratory function and consequent 72 h-survival rate of the septic *** removal strategy with blood purification using the new adsorber renders a potential promising future in sepsis therapy.

关键词： Sepsis Endotoxin Adsorption Polyvinylidene fluoride matrix immobilized with L-serine ligand (PVDF-Ser) Hemoperfusion Pig

Waste Foundry Sand Reused as Clay Replacement for Tile Manufacture

在线全文

学校读者我要写书评

暂无评论

International Journal of Transportation Science and Technology 2014年第4期3卷 339-351页

作者： huan-lin Luo Deng-Fong lin Mei-ling Chung Lisa Y.Chen Department of Civil and Ecological Engineering I-Shou UniversityNo.1Sec.1Syuecheng Rd.Dashu DistrictKaohsiung City 84001TaiwanR.O.C Department of Information Management I-Shou UniversityNo.1Sec.1Syuecheng Rd.Dashu DistrictKaohsiung City 84001TaiwanR.O.C

In an effort to extend the reutilization of waste foundry sand(WFS),we evaluated the use of WFS as a replacement for clay in tile *** effects of WFS addition on the properties of clay tile specimens were investigated at six different levels of WFS replacement:0,10,15,20,40,and 60%.These specimens were fired at one of three different kiln temperatures:1,000,1,050,and 1,100º*** physical analyses were performed to determine the properties of the finished *** results of this study indicate that the properties of the tile specimens were improved by WFS supplementation and that the optimal clay replacement level was 15%WFS.

关键词： finished replacement optimal

Tracheostomy and venovenous extracorporeal membrane oxygenation for difficult airway patient with carinal melanoma:A case report and literature review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第35期10卷 13088-13098页

作者： I-Liang Liu An-Hsun Chou Chien-Hung Chiu Yu-Ting Cheng huan-Tang lin Department of Anesthesiology Chang Gung Memorial HospitalLinkou Medical CenterTaoyuan 333Taiwan College of Medicine Chang Gung UniversityTaoyuan 333Taiwan Division of Thoracic and Cardiovascular Surgery Department of SurgeryChang Gung Memorial HospitalLinkou Medical CenterTaoyuan 333Taiwan Graduate Institute of Clinical Medical Sciences Chang Gung UniversityTaoyuan 333Taiwan

BACKGROUND Anesthesia for tracheal tumor resection is challenging,particularly in patients with a difficult upper *** report a case of a difficult upper airway with a metastatic tracheal tumor causing near-total left bronchial obstruction and requiring emergency tracheostomy and venovenous extracorporeal membrane oxygenation(VV-ECMO)support for rigid bronchoscopy-assisted tumor *** SUMMARY A 41-year-old man with a history of right retromolar melanoma treated by tumor excision and myocutaneous flap reconstruction developed progressive dyspnea on exertion and syncope *** computed tomography revealed a 3.0-cm tracheal mass at the carinal level,causing 90%tracheal lumen *** bronchoscopy revealed a pigmented tracheal mass at the carinal level causing critical carinal *** of aggravated symptoms,emergency rigid bronchoscopy for tumor resection and tracheal stenting were planned with standby *** to limited mouth opening,tracheostomy was necessary for rigid bronchoscopy *** transferring the patient to the operating table,sudden desaturation occurred and awake fiberoptic nasotracheal intubation was performed for ventilation *** and internal jugular vein were catheterized to facilitate possible VV-ECMO *** tracheostomy,progressive desaturation developed and VV-ECMO was instituted *** tumor resection and tracheal stenting,VV-ECMO was weaned smoothly,and the patient was sent for intensive postoperative *** days later,he was transferred to the ward for palliative immunotherapy and subsequently discharged *** In a difficult airway patient with severe airway obstruction,emergency tracheostomy for rigid bronchoscopy access and standby VV-ECMO can be life-saving,and ECMO can be weaned smoothly after tumor *** anesthesia for patients with tracheal tumors causing critical airway obstruction,spontaneous ventilation should be maintaine

关键词： Tracheostomy Extracorporeal membrane oxygenation Tracheal tumor Melanoma Case report