检索结果-南通市图书馆

Comparative study of pulsed laser diode end-pumped thulium-doped 2-µm Q-switched lasers

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

Chinese Physics B 2021年第3期30卷 293-299页

作者： Ya Wen Zhen Fan Lin-Hao Shang Guang-Yong Jin Wang Chao Xin-Yu Chen chun-ting wu Jilin Key Laboratory of Solid Laser Technology and Application College of ScienceChangchun University of Science and TechnologyChangchun 130022China

We report pulsed laser diode(LD)end-pumped acoustic Q-switched Tm:YAG laser,Tm:LuAG laser,and Tm:LuYAG laser and the physical properties and spectra of Tm:YAG,Tm:LuAG,and Tm:LuYAG are *** Tm:LuYAG laser is pumped by 785-nm and 788-nm pulses separately,and is compared with Tm:YAG *** output energy values and output wavelengths of Tm:LuAYG lasers pumped by LDs with different wavelengths are obtained and compared with each *** the repetition frequency is 100 Hz,the pulsed Tm:YAG laser has single pulse energy of 15.9 mJ,pulse width of 126.7 ns,and the center wavelength of 2013.36 nm,and the pulsed Tm:LuAG laser possesses single pulse energy of 11.8 mJ,pulse width of 252.4 ns,and the center wavelength of 2023.65 nm,and the pulsed Tm:LuYAG laser output energy values are 12.32 mJ and 12.25 mJ with the slope efficiencies of 12.5%and 11.85%,the center wavelengths of 2017.89 nm and 2027.11 nm,respectively,while the pump sources are 785-nm and 788-nm pulsed LDs,respectively.

关键词： thulium-doped crystal bonded crystal mixed crystal 2-µm laser

Effect of stress-relief annealing on thermal fatigue cracks for die-casting die steels

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 Iron and Steel Research International 2024年第5期31卷 1164-1176页

作者： Zhi-xiong Bai Xiao-chun wu School of Materials Science and Engineering Shanghai UniversityShanghai200444China

The effect of stress-relief annealing at different stages of thermal fatigue tests on crack growth was investigated using a self-built thermal cycle *** results showed that annealing could limit crack expansion *** reduced dislocation density and released the accumulation of residual *** addition,the strain accumulation in carbides was reduced by this *** was also found that double annealing was even more effective at inhibiting crack expansion compared to single stress-relief *** 1000 cycles,the maximum crack length was reduced by 31.1%and 45.2%for the samples after using the optimal single and double annealing processes,*** single stress-relief annealing,earlier annealing provides more benefit in delaying crack ***,effective double stress-relief annealing requires a suitable time interval between the annealing ***,after 800 cycles,surface hardness decreased significantly accompanied by an increase in the size and number of carbides,and cracks expanded predominantly along grain boundaries.

关键词： Thermal fatigue Steel Carbide Stress-relief annealing Dislocation Residual stress

High-temperature stability of retained austenite and plastic deformation mechanism of ultra-fine bainitic steel isothermally treated below Ms

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 Iron and Steel Research International 2024年第8期31卷 2014-2030页

作者： ting-ting He Feng Hu Kun Wang Wen Zhou Li Li Serhii Yershov Kai-ming wu The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Collaborative Innovation Center for Advanced Steels Wuhan University of Science and TechnologyWuhan 430081HubeiChina Zhejiang Tsingshan Iron and Steel Co. Ltd.Qingtian 323903ZhejiangChina

The mechanical properties of the sample and the stability of retained austenite were studied by designing two kinds of ultra-fine bainitic steel with different heat treatment methods austempering above and below Ms(martensite start tem-perature),which were subjected to tensile tests at 20 and 450℃,*** results show that compared to room temperature(20℃)tensile properties,the uniform elongation of the sample at high temperature(450℃)significantly ***,the uniform elongation of the sample austempered above Ms decreased from 8.0%to 3.5%,and the sample austempered below Ms decreased from 10.9%to 3.1%.Additionally,the tensile strength of the sample austempered above Ms significantly decreased(from 1281 to 912 MPa),and the sample austempered below Ms slightly decreased(from 1010 to 974 MPa).This was due to the high carbon content(1.60 wt.%),high mechanical stability,low thermal stability for the retained austenite of the sample austempered below ***,the retained austenite decomposed at high temper-atures,the carbon content and transformation driving force were significantly reduced,the transformation rate increased,and the phase transformation content reduced.

关键词： Ultra-fine bainite Isothermal treatment High-temperature tensile property Retained austenite stability Plastic deformation

Integration of urchin-like MnCo_(2)O_(4)@C core–shell nanowire arrays within porous copper current collector for superior performance Li-ion battery anodes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第2期43卷 599-611页

作者： Xue-Ru Zhang Qiong wu Yong Zhang Xi-Fei Li ting Xie Yu-Cheng wu Instrumental Analysis Center Hefei University of TechnologyHefei230009China Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei230009China School of Materials Science and Engineering Hefei University of TechnologyHefei230009China Institute of Advanced Electrochemical Energy Xi’an University of TechnologyXi’an710048China

Spinel MnCo_(2)O_(4) is a promising energy storage candidate as anode materials in lithium-ion batteries owing to synergistic effects of two intrinsic solid-state redox ***,low conductivity,poor rate capacity and rapid capacity fading have seriously impaired its practical *** overcome the inferiorities,urchin-like MnCo_(2)O_(4)@C core–shell nanowire arrays have been fabricated directly within a porous copper current collector via a facile hydrothermal method followed by a chemical vapor deposition carbonization *** a typical nanowire,the core is composed of interconnected MnCo_(2)O_(4)nanoparticles and the shell shows as a thin amorphous carbon *** integrated MnCo_(2)O_(4)@C/Cu structure could act as working anodes without using additives or polymer *** MnCo_(2)O_(4)@C/Cu possesses slightly longer Li-ion insertion/desertion pathway than that of MnCo_(2)O_(4)/Cu,the carbon shell could effectively prevent the pulverization of MnCo_(2)O_(4) and lower down charge transfer resistance and actively participate in Li-ion *** rearrangement of carbon atoms during lithiation/delithiation cycling could inhibit the formation of passive solid electrolyte interphase *** a result,the MnCo_(2)O_(4)@C/Cu electrode presents superior rate capacity(600 mAh·g^(−1) at 1 A·g^(−1)) and better stability(797 mAh·g^(−1) after 200 cycles at 100 mA·g^(−1)).The excellent reversible Li ion storage capacity,cycling stability and rate capacity endow MnCo_(2)O_(4)@C/Cu great potential as stable and high output integrated anode materials in Li-ion batteries.

关键词： MnCo_(2)O_(4)@C Urchin-like nanowire arrays Core-shell Integrated anode materials Lithium-ion batteries

Enhanced Fenton-like process over Cu/L(+)-ascorbic acid co-doping mesoporous silica for toxicity reduction of emerging contaminants

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

Frontiers of Environmental Science & Engineering 2024年第4期18卷 49-60页

作者： Yuhang Liu Wenxuan Deng Xiaojun wu chun Hu Lai Lyu Key Laboratory for Water Quality and Conservation of the Pearl River Delta(Ministry of Education) Institute of Environmental Research at Greater BayGuangzhou UniversityGuangzhou 510006China

Effective removal of emerging contaminants(ECs)to minimize their impacts on human health and the natural environment is a global *** the removal of ECs in water,we fabricated a seaweed spherical microsphere catalyst with Cu cation-πstructures by in situ doping of Cu species and ascorbic acid in mesoporous silica(Cu-C-MSNs)via a hydrothermal *** results indicate that bisphenol A(BPA)is substantially degraded within 5 min under natural conditions,with its biological toxicity considerably ***,industrial wastewater could also be effectively purified by Cu-C-MSNs/H_(2)O_(2) *** presence of metal sites and the complexation of ECs via cation-πinteraction andπ-πstacking on the catalyst surface were directly responsible for the polarization distribution of electrons,thus activating H_(2)O_(2) and dissolved oxygen(DO).The removal of contaminants could be attributed primarily to 1)the activation of H_(2)O_(2) into ^(·)OH to attack the contaminants and 2)self-cleavage because of the transfer of electrons from the contaminants to the *** study provides an innovative solution for the effective treatment of ECs and has positive implications for easing global environmental crises.

关键词： Cation-πstructures Polarization electric field Fenton-like process Contaminants cleavage

Combining lymph node ratio to develop prognostic models for postoperative gastric neuroendocrine neoplasm 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 Gastrointestinal Oncology 2024年第8期16卷 3507-3520页

作者： Wen Liu Hong-Yu wu Jia-Xi Lin Shu-ting Qu Yi-Jie Gu Jin-Zhou Zhu chun-Fang Xu Department of Gastroenterology Changzhou Hospital of Traditional Chinese MedicineChangzhou 213000Jiangsu ProvinceChina Department of Gastroenterology The First Affiliated Hospital of Soochow UniversitySuzhou 215006Jiangsu ProvinceChina Department of Gastroenterology Suzhou Ninth Hospital Affiliated to Soochow UniversitySuzhou 215200Jiangsu ProvinceChina

BACKGROUND Lymph node ratio(LNR)was demonstrated to play a crucial role in the prognosis of many ***,research concerning the prognostic value of LNR in postoperative gastric neuroendocrine neoplasm(NEN)patients was *** To explore the prognostic value of LNR in postoperative gastric NEN patients and to combine LNR to develop prognostic *** A total of 286 patients from the Surveillance,Epidemiology,and End Results database were divided into the training set and validation set at a ratio of 8:2.92 patients from the First Affiliated Hospital of Soochow University in China were designated as a test *** regression analysis was used to explore the relationship between LNR and disease-specific survival(DSS)of gastric NEN *** survival forest(RSF)algorithm and Cox proportional hazards(CoxPH)analysis were applied to develop models to predict DSS respectively,and compared with the 8th edition American Joint Committee on Cancer(AJCC)tumornode-metastasis(TNM)*** Multivariate analyses indicated that LNR was an independent prognostic factor for postoperative gastric NEN patients and a higher LNR was accompanied by a higher risk of *** RSF model exhibited the best performance in predicting DSS,with the C-index in the test set being 0.769[95%confidence interval(CI):0.691-0.846]outperforming the CoxPH model(0.744,95%CI:0.665-0.822)and the 8th edition AJCC TNM staging(0.723,95%CI:0.613-0.833).The calibration curves and decision curve analysis(DCA)demonstrated the RSF model had good calibration and clinical ***,the RSF model could perform risk stratification and individual prognosis prediction *** A higher LNR indicated a lower DSS in postoperative gastric NEN *** RSF model outperformed the CoxPH model and the 8th edition AJCC TNM staging in the test set,showing potential in clinical practice.

关键词： Gastric neuroendocrine neoplasm Lymph node ratio Disease-specific survival Random survival forest Predictive model

Effects of environment and genotype-by-environment interaction on phenotype of Rorippa elata(Brassicaceae),an endemic alpine plant in the Hengduan mountains

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 Plant Ecology 2024年第4期17卷 42-55页

作者： Zhi-Qiang Du Yao-wu Xing ting-Shen Han CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Plant Diversity and Specialty Crops Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China

Global climate change poses a severe threat to mountain *** plasticity and local adaptation are two common strategies for alpine plant to cope with such *** may facilitate organismal adaptation to contrasting environments,depending on the influences of the environment or genotype or their interacted *** this study,we use an endemic alpine plant(Rorippa elata)in the Hengduan mountains(HDM)to unravel its phenotypic basis of adaptation strategy and evaluate the relative contributions of environment and genotype to its *** transplanted 37 genotypes of *** into two common gardens across low and high elevations(2800 vs.3800 m)during *** fitness-related traits were measured,including flowering probability and glucosinolates(GS)*** estimated the environmental or genotypic contributions to the phenotype and identified the main environmental *** results revealed that both environment and genotype-by-environment interactions contributed to the phenotypes of *** heterogeneity was identified as a key factor that explained 24%of the total phenotypic *** particular,genotypes of the northern HDM showed significantly higher plasticity in flowering probability than those of the southern ***,within the southern HDM,GS content indicated local adaptation to herbivory stresses for *** genotypes along *** conclusion,our results suggest that *** may have adapted to the alpine environment through species-level plasticity or regional-level local *** processes were shaped by either complex topography or interactions between genotype and mountain *** study provides empirical evidence on the adaptation of alpine plants.

关键词： alpine plant common garden genotype-by-environment Hengduan mountains local adaptation phenotypic plasticity

Structure attack on full-round DBST

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 2024年第4期18卷 223-225页

作者： Chenhao JIA Qing LING ting wu tingting CUI School of Cyberspace Hangzhou Dianzi UniversityHangzhou 310018China Hangzhou Innovation Institute Beihang UniversityHangzhou 310052China Key Laboratory of Cryptologic Technology and Information Security(Ministry of Education) Shandong UniversityQingdao 266237China

1 Introduction Block cipher is one of the most important part of symmetric cipher,which has been widely used in the field of computer communication and information system *** order to meet the increasing demand for ensuring secure data transmission in Internet of Things(IoT)environment,lightweight block ciphers have become more and more important due to their easy software implementation,low resource consumption,ease of standardization and high ***,in order to satisfy the constraints of resource-limited devices,lightweight block ciphers strive to achieve a balance between the cost of software and hardware implementation,efficiency,and ***,sometimes the security of lightweight block ciphers might be challenged due to the simplified ***,it is meaningful to study the type of simplified lightweight block ciphers.

关键词： hardware computer simplified

Dietary inflammatory index and its impact on severity and recurrence of Tourette syndrome in children

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 Psychiatry 2024年第8期14卷 1208-1215页

作者： Xiao-Ping wu Rong-Rong Fang ting-ting Ji Department of Pediatrics Qingdao Chengyang People’s HospitalQingdao 266109Shandong ProvinceChina

BACKGROUND Tourette syndrome(TS)is a neurodevelopmental disorder characterized by the presence of motor and vocal tics,typically beginning in *** signifi-cant research efforts,the exact pathophysiology of TS remains incompletely *** studies suggest that inflammation may play a role in the severity and progression of TS,pointing to the potential influence of dietary and lifestyle factors on the ***,research on the specific connection between dietary inflammatory index(DII)and TS is still in its early stages,requir-ing additional clinical and epidemiological studies to validate the strength and specific mechanisms of this *** A total of 207 children diagnosed with TS in the pediatric department of Qingdao Chengyang People’s Hospital from January 2022 to January 2023 were *** were divided into stable and unstable groups based on follow-up *** enrollment,general information of the children[age,gender,body mass index(BMI),guardian’s education level,DII score,medical history,family history,academic stress,electronic device usage,medication,and disease progression]was assessed,and serum inflammatory levels were measured during follow-up *** scores and Yale Global Tic Severity Scale(YGTSS)scores were ***,based on YGTSS scores,the children were classified into mild,moderate,and severe *** DII,interleukin-6(IL-6),C-reactive protein(CRP),and tumor necrosis factor-alpha(TNF-α)levels in each group were *** Follow-up surveys were completed by 207 children and their *** them,117 children were in the stable group,and 90 were in the recurrent *** found no statistically significant differences in age,gender,comorbidities,BMI,and disease duration between the two groups(P>0.05).However,academic stress,electronic device usage,medication,guardian’s education level,and DII scores showed statistically significant differences between the groups(P

关键词： Dietary inflammation index Tourette's syndrome Correlation analysis Pro-inflammatory foods Inflammation levels Impact on severity and recurrence