检索结果-南通市图书馆

Influence of Filling Ratio and Work.ng Fluid Thermal Properties on Starting up and Heat Transferring Performance of Closed Loop Plate Oscillating Heat Pipe with Parallel Channels

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2017年第1期26卷 73-81页

作者： shI Weixiu pan Lisheng School of Environment and Energy Engineering Beijing University of Civil Engineering and Architecture Beijing k.y Lab of Heating Gas SupplyVentilating and Air Conditioning Engineering State k.y Laboratory of High-temperature Gas Dynamics Institute of MechanicsChinese Academy of Sciences

Using ethanol or acetone as the work.ng fluid, the performance of starting up and heat transfer of closed-loop plate oscillating heat pipe with parallel channels(POHP-PC) were experimentally investigated by varying filling ratio, inclination, work.ng fluids and heating power. The performance of the tested pulsating heat pipe was mainly evaluated by thermal resistance and wall temperature. Heating copper block.and cold water bath were adopted in the experimental investigations. It was found that oscillating heat pipe with filling ratio of 50% started up earlier than that with 70% when heating input was 159.4 W, however, it has similar starting up performance with filling ratio of 50% as compared to 70% on the condition of heat input of 205.4 W. And heat pipe with filling ratio of 10% could not start up but directly transit to dry burning. A reasonable filling ratio range of 35%-70% was needed in order to achieve better performance, and there are different optimal filling ratios with different heating inputs- the more heating input, the higher optimal filling ratio, and vice versa. However, the dry burning appeared easily with low filling ratio, especially at very low filling ratio, such as 10%. And higher filling ratio, such as 70%, resulted in higher heat transfer( dry burning) limit. With filling ratio of 70% and inclination of 75°, oscillating heat pipe with acetone started up with heating input of just 24 W, but for ethanol, it needed to be achieved 68 W, Furthermore, the start time with acetone was similar as compared to that with ethanol. For steady operating state, the heating input with acetone was about 80 W, but it transited to dry burning state when heating input was greater than 160 W. However, for ethanol, the heating input was in vicinity of 160 W. Furthermore, thermal resistance with acetone was lower than that with ethanol at the same heating input of 120 W.

关键词： closed loop with parallel channels, plate pulsating heat pipe, filling ratio, work.ng fluid thermalproperties, start up, heat transfer performance

Novel lactylation-related signature to predict prognosis for pancreatic adenocarcinoma

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第19期30卷 2575-2602页

作者： Tian Peng Fang Sun Jia-Chun Yang Mei-Hong Cai man-Xiu Huai Jia-Xing pan Fei-Yu Zhang Lei-Ming Xu Department of Gastroenterology Xinhua Hospital Affiliated to Shanghai Jiao Tong UniversityShanghai 200092China

BACk.ROUND Lactate,previously considered a metabolic byproduct,is pivotal in cancer progression and maintaining the immunosuppressive tumor *** investigations confirmed that lactate is a primary regulator,introducing recently described post-translational modifications of histone and non-histone proteins,termed lysine *** adenocarcinomas are characterized by increased glycolysis and lactate ***,our understanding of lactylation-related genes in pancreatic adenocarcinomas remains *** To construct a novel lactylation-related gene signature to predict the survival of patients with pancreatic *** RNA-seq and clinical data of pancreatic adenocarcinoma(PDAC)were obtained from the GTEx(Genotype-Tissue Expression)and TCGA(The Cancer Genome Atlas)databases via Xena Explorer,and GSE62452 datasets from *** on lactylation-related genes were obtained from publicly available *** expressed genes(DEGs)were acquired by using R pack.ge“DESeq2”in *** COX regression analysis,LASSO Cox and multivariate Cox regressions were produced to construct the lactylation-related prognostic *** analyses,including functional enrichment,ESTIMATE,and CIBERSORT,were performed to analyze immune status and treatment responses in patients with pancreatic *** and normal human cell lines were subjected to western blot analysis under lactic acid intervention;two PDAC cell lines with the most pronounced lactylation were ***,RT-PCR was employed to assess the expression of LRGs genes;SLC16A1,which showed the highest expression,was selected for further ***16A1-mediated lactylation was analyzed by immunofluorescence,lactate production analysis,colony formation,transwell,and wound healing assays to investigate its role in promoting the proliferation and migration of PDAC *** vivo validation was performed using an established tumor *** In this stud

关键词： pancreatic adenocarcinoma Lactylation Prognosis Immunotherapy Tumor microenvironment

Preserving location privacy without exact locations in mobile services

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2013年第3期7卷 317-340页

作者： Xiao pan Xiaofeng MENG School of Economics and management Shijiazhuang Tiedao University Shijiazhuang 050043 China School of Information Renmin University of China Beijing 100872 China

Privacy preservation has recently received considerable attention in location-based services （LBSs）. A large number of location cloak.ng algorithms have been proposed for protecting the location privacy of mobile users. However, most existing cloak.ng approaches assume that mobile users are trusted. And exact locations are required to protect location privacy, which is exactly the information mobile users want to hide. In this paper, we propose a p-anti-conspiration privacy model to anonymize over semi-honest users. Further- more, two k.NNG-based cloak.ng algorithms, vk.NNCA and ek.NNCA, are proposed to protect location privacy without exact locations. The efficiency and effectiveness of the pro- posed algorithms are validated by a series of carefully designed experiments. The experimental results show that the price paid for location privacy protection without exact locations is small.

关键词： location privacy semi-honest users privacy preservation location-based services

Serum Mac-2 binding protein glycosylation isomer level predicts hepatocellular carcinoma development in E-negative chronic hepatitis B patients

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 Gastroenterology 2019年第11期25卷 1398-1408页

作者： Lung-Yi Mak.Wai-pan To Danny k.-Ho Wong James Fung Fen Liu Wai-k.y Seto Ching-Lung Lai man-Fung Yuen Department of Medicine Queen Mary Hospital Department of Medicine The University of Hong Kong State k.y Laboratory for Liver Research The University of Hong Kong

BACk.ROUND Liver cirrhosis is a major risk.factor for hepatocellular carcinoma(HCC)development in chronic hepatitis B(CHB). Serum Mac-2 binding protein glycosylation isomer(M2 BPGi) is a novel serological mark.r for fibrosis. The role of M2 BPGi in prediction of HCC is *** To examine the role of serum M2 BPGi in predicting HCC development in hepatitis B e antigen(HBeAg)-negative *** Treatment-naive CHB patients with documented spontaneous HBeAg seroconversion were recruited. Serum M2 BPGi was measured at baseline(within3 years from HBeAg seroconversion), at 5 years and 10 years after HBeAg seroconversion and expressed as cut-off index(COI). Multivariate cox regression was performed to identify predictors for HCC development. ROC analysis was used to determine the cut-off value of M2 *** Among 207 patients(57% male, median age at HBeAg seroconversion 40 years old) with median follow-up of 13.1(11.8-15.5) years, the cumulative incidence of HCC at 15 years was 7%. Median M2 BPGi levels were significantly higher in patients with HCC compared to those without HCC(baseline: 1.39 COI vs 0.38 COI, P < 0.001; 5-year: 1.45 COI vs 0.47 COI, P < 0.001; 10-year: 1.20 COI vs 0.55 COI, P = 0.001). Multivariate analysis revealed age at HBeAg seroconversion[odds ratio(OR) = 1.196, 95% confidence interval(CI): 1.034-1.382, P = 0.016] and baseline M2 BPGi(OR = 4.666, 95%CI: 1.296-16.802, P = 0.018) were significant factors predictive of HCC. Using a cut-off value of 0.68 COI, baseline M2 BPGi yielded AUROC of 0.883 with 91.7% sensitivity and 80.8% *** High serum M2 BPGi within 3 years after HBeAg seroconversion was a strong predictor for subsequent HCC development in treatment-naive HBeAg-negative CHB patients.

关键词： Hepatocellular carcinoma Hepatitis B Liver fibrosis Mac-2 binding protein glycosylation isomer Biomark.r

Compressive properties of a novel slurry-infiltrated fiber concrete reinforced with arc-shaped steel fibers

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 A(Applied Physics & Engineering) 2023年第6期24卷 543-556页

作者： Hedong LI Yabiao LI Yunfeng pan P.L.NG Christopher k.Y.LEUNG Xin ZHAO School of Civil Engineering and Architecture Zhejiang Sci-Tech UniversityHangzhou 310018China Department of Civil Engineering The University of Hong KongHong Kong 999077China Faculty of Civil Engineering Vilnius Gediminas Technical UniversityVilnius LT-10223Lithuania Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyHong Kong 999077China School of Civil Engineering and Architecture Zhejiang University of Science and TechnologyHangzhou 310023China

Slurry-infiltrated fiber concrete(SIFCON)is a sort of strain hardening cement-based composite material,typically made with 5%–20%steel *** study focused on a novel type of SIFCON in which hook.d-end steel fibers were replaced by arc-shaped steel *** quasi-static compressive properties of the SIFCON were first *** results suggested that using arc-shaped steel fibers in lieu of hook.d-end steel fibers increased the quasi-static compressive strength by 47.1%and the strain at peak.stress by 56.3%.We attribute these improvements to new crack.resisting mechanisms,namely“fiber crosslock.,“dual bridging”,and“confinement loops”,when the arc-shaped steel fibers are introduced into *** high impact resistance is a special property of SIFCON that is of practical significance,the dynamic compressive properties of arc-shaped steel fiber SIFCON were studied by using an 80-mm-diameter split Hopk.nson pressure bar(shPB).The results showed that the dynamic compressive strength,dynamic increase factor(DIF),and dynamic toughness of SIFCON all increased with the strain *** SIFCON incorporating arc-shaped steel fibers proved to have significant advantages in structural applications requiring high impact resistance.

关键词： Slurry-infiltrated fiber concrete(SIFCON) Arc-shaped steel fiber Quasi-static compressive properties Spilt Hopk.nson pressure bar(shPB) Dynamic compressive properties

Removal of VOCs from gas streams with double perovsk.te-type catalysts

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 Environmental Sciences 2018年第7期30卷 205-216页

作者： k.an Lun pan Guan Ting pan Siewhui Chong Moo Been Chang Graduate Institute of Environmental Engineering National Central University Department of Chemical Engineering National Taipei University of Technology Department of Chemical and Environmental Engineering University of Nottingham Malaysia Campus

Double perovsk.te-type catalysts including La2 CoMnO6 and La2 CuMnO6 are first evaluated for the effectiveness in removing volatile organic compounds（VOCs）, and single perovsk.tes（La CoO3, LaMnO3, and La Cu O3） are also tested for comparison. All perovsk.tes are tested with the gas hourly space velocity（GHSV） of 30,000 hr^-1, and the temperature range of100–600℃ for C7H8 removal. Experimental results indicate that double perovsk.tes have better activity if compared with single perovsk.tes. Especially, toluene（C7H8） can be completely oxidized to CO2 at 300℃ as La2 Co MnO6 is applied. Characterization of catalysts indicates that double perovsk.tes own unique surface properties and are of higher amounts of lattice oxygen,leading to higher activity. Additionally, apparent activation energy of 68 k.J/mol is calculated using Mars-van k.evelen model for C7 H8 oxidation with La2 Co Mn O6 as catalyst. For durability test, both La2 Co Mn O6 and La2 CuMnO6 maintain high C7 H8 removal efficiencies of 100% and98%, respectively, at 300℃ and 30,000 hr^-1, and they also show good resistance to CO2（5%） and H2 O（g）（5%） of the gas streams tested. For various VOCs including isopropyl alcohol（C3H8 O）,ethanal（C2H4O）, and ethylene（C2H4） tested, as high as 100% efficiency could be achieved with double perovsk.te-type catalysts operated at 300–350℃, indicating that double perovsk.tes are promising catalysts for VOCs removal.

关键词： Volatile organic compounds(VOCs) Toluene(C7H8) Double perovsk.te-type catalyst Catalysis Activation energy

Acceptor doping and actuation mechanisms in Sr-doped BiFeO_(3)-BaTiO_(3)ceramics

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2024年第1期10卷 57-69页

作者： Ziqi Yang Yizhe Li Bing Wang Juncheng pan Annette k.k.eppe David A.Hall Department of Materials University of ManchesterM139PLManchesterUK Diamond Light Source Ltd. Harwell Science and Innovation CampusOX110DEDidcotUK

BiFeO_(3)-BaTiO_(3)(BF-BT)ceramics are important multiferroic materials,which are attracting significant attention for potential applications in high temperature lead-free piezoelectric *** the present study,the effects of Sr^(2+)as an acceptor dopant for Bi^(3+),in the range from 0 to 1.0%(in mole),on the structure and ferroelectric/piezoelectric properties of 0.7BiFeO_(3)-0.3BaTiO_(3)ceramics were *** use of a post-sintering Ar annealing process was found to be an effective approach to reduce electrical conductivity induced by the presence of electron holes associated with reoxidation during cooling.A low Sr dopant concentration(0.3%,in mole)yielded enhanced ferroelectric(P_(max)∼0.37 C/m^(2),P_(r)∼0.30 C/m^(2))and piezoelectric(d_(33)∼178 pC/N,k.(p)∼0.27)properties,whereas higher levels led to chemically heterogeneous core-shell structures and secondary phases with an associated decline in *** electric field-induced strain of the Sr-doped BF-BT ceramics was investigated using a combination of digital image correlation macroscopic strain measurements and in-situ synchrotron X-ray *** of the intrinsic(lattice strain)and extrinsic(domain switching)contributions to the electric field induced strain indicated that the intrinsic contribution dominated during the poling process.

关键词： Bismuth ferrite-barium titanate Acceptor doping Electroceramics Piezoelectricity In-situ X-ray diffraction

Enterohaemolysin production and verotoxin genes in Escherichia coli strains isolated from neonatal calves in India

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2009年第4期2卷 1-5页

作者： Diganta pan Ashok.k.mar Bhatia k.N.Bhilegaonk.r Department of Microbiology and Immunology College of Veterinary Science and Animal HusbandryMathura-281 001UPIndia Indian Veterinary Research Institute IzatnagarU.P.243122India

Objective:To screened all haemolytic strains of Escherichia coli(***) for the presence of verotoxin genes and speculate the association between enterohaemolysin production and presence of verotoxin ***: A total 176 of *** strains of 64 serogroups isolated from neonatal calves were selected and screened for alpha -haemolysin and enterohaemolysin production on sheep blood agar and 5%washed sheep blood *** types of haemolytic strains were further characterized by PCR for presence of Verotoxin gene(VT1 and VT2) and confirmed by verocell cytotoxicity ***:Among 27 enterohaemolytic positive strains,19(70. 37%) strains were found positive for presence of verotoxins(VTs) gene and verocell cytotoxicity assay. Whereas 34 alpha-haemolysin strains were found negative for *** strains of *** were found VTs negative but Ehx ***:The close association between enterohaemolysin production and presence of verotoxin genes mak.s it useful epidemiological mark.r for rapid screening of Verotoxic *** but this phenotypic mark.r for screening of verotoxigenic Escherichia coli(VTEC) alone may raise a question in animal.

关键词： Enterohaemolysin Alpha haemolysin Verotoxigenic Escherichia coli Calves India

Structure and Combustion Characteristics of Methane/Air Premixed Flame under the Action of Wall

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Engineering 2021年第4期118卷 1135-1154页

作者： Feiyang Li Jianfeng pan Chenxin Zhang Evans k.Quaye Xia shao School of Energy and Power Engineering Jiangsu UniversityZhenjiang212013China

In order to obtain the combustion characteristics of the CH4/Air premixed flame under the action of the wall interaction,a study on the impact of the jet flame on the wall at different separation distances was carried *** separation distance from the burner outlet to the lower surface of the wall is changed and the flame structure is obtained through *** temperature,velocity and reaction rate are obtained through numerical simulation,and the law of flame characteristics change is obtained through *** results show that as the separation distance increases,the premixing cone inside the flame gradually changes from a horn shape to a complete cone shape and the length of the premixing cone profile ***,the peak.temperature and velocity of the mixture in the axial direction gradually increase,and the temperature and velocity in the radial direction first increase and then *** temperature gradient and velocity reach the maximum when the separation distance is 11 *** peak. of reactants(CH_(4))net reaction rate intermediate products(CO)and products(CO_(2),H_(2)O)on the axis and the axial distance corresponding to the peak. increase *** chemical reaction rate near the wall also gradually decreases with the increase of the separation distance.

关键词： Flame-wall interaction separation distance flame structure air flow temperature flow velocity reaction rate