检索结果-南通市图书馆

Journal of Environmental Sciences 2024年第1期135卷 433-448页

作者： xiang meng Pierre Désesquelles Lejin Xu Department of Nuclear Engineering and Technology School of Energy and Power EngineeringHuazhong University of Science&TechnologyWuhan 430074China CNRS Laboratoire de Physique des Gaz et des PlasmasUniversitéParis-SaclayOrsay 91405France State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The treatment and disposal of radioactive waste are presently facing great *** ion exchange resins have become a focus of attention due to their high production and serious environmental *** this paper,a simplified model of cationic exchange resin is proposed,and the degradation processes of cationic resin monomer initiated by hydroxyl radicals(·OH)are clarified by combining statistical molecular fragmentation(SMF)model and density functional theory(DFT)*** prediction of active sites indicates that the S-O bonds and the C-S bond of the sulfonic group are more likely to react during the *** meta-position of the sulfonic group on the benzene ring is the most active site,and the benzene ring without the sulfonic group has a certain *** C11-C14 and C17-C20 bonds,on the carbon skeleton,are the most easily *** is also found that dihydroxy addition and elimination reactions play a major role in the process of desulfonation,carbon skeleton cleavage and benzene ring *** decomposition mechanisms found through the combination of physical models and chemical calculations,provide theoretical guidance for the treatment of complex polycyclic aromatic hydrocarbons.

关键词： Cationic exchange resin Statistical molecular fragmentation model Density functional theory Hydroxyl radical Decomposition mechanism

维普期刊数据库

Restricted Arc-Connectivity of Harary Digraphs

在线全文

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2024年第2期12卷 540-547页

作者： Jun-Hao Zhang Ji-xiang meng College of Mathematics and System Science Xinjiang UniversityUrumqi 830046XinJiangChina

The h-restricted arc-connectivity of a digraph is an important parameter to measure fault-tolerance of interconnection *** paper determines that the h-restricted arc-connectivity of the Harary digraph D=G(n;1,2,.:,k)i... 详细信息

关键词： Restricted arc-connectivity λ_(h)(D) Super-λ_(h) λ_(h)-Atom λ_(h)-Superatom

Influence of tectonic preservation conditions on the nanopore structure of shale reservoir: A case study of Wufeng-Longmaxi Formation shale in western Hubei area, south China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Science 2024年第4期21卷 2203-2217页

作者： meng xiang Shang Xu Ya-Ru Wen Qi-Yang Gou Bing-Chang Liu National Key Laboratory of Deep Oil and Gas China University of Petroleum (East China) Hubei Key Laboratory of Resources and Eco-environment Geology Hubei Geological Survey Key Laboratory of Tectonics and Petroleum Resources Ministry of Education China University of Geosciences

Tectonism is one of the dominant factors affecting the shale pore structure. However, the control of shale pore structure by tectonic movements is still controversial, which limits the research progress of shale gas accumulation mechanism in the complex tectonic region of southern China. In this study, 34 samples were collected from two exploratory wells located in different tectonic locations. Diverse experiments,e.g., organic geochemistry, XRD analysis, FE-SEM, low-pressure gas adsorption, and high-pressure mercury intrusion, were conducted to fully characterize the shale reservoir. The TOC, Ro, and mineral composition of the shale samples between the two wells are similar, which reflects that the shale samples of the two wells have proximate pores-generating capacity and pores-supporting ***, the pore characteristics of shale samples from two wells are significantly different. Compared with the stabilized zone shale, the porosity, pore volume, and specific surface area of the deformed zone shale were reduced by 60.61%, 64.85%, and 27.81%, respectively. Moreover, the macroscopic and fine pores were reduced by 54.01% and 84.95%, respectively. Fault activity and uplift denudation are not conducive to pore preservation, and the rigid basement of Huangling uplift can promote pore preservation. These three factors are important reasons for controlling the difference in pore structure between two wells shales. We established a conceptual model of shale pores evolution under different tectonic preservation conditions. This study is significant to clarify the scale of shale gas formation and enrichment in complex tectonic regions, and helps in the selection of shale sweet spots.

关键词： Shale gas Pore structure Tectonic preservation conditions Shale gas enrichment mechanism

Linear shallow neural network to accelerate transmitter dispersion eye closure quaternary(TDECQ) assessment

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第4期67卷 337-338页

作者： Junjiang xiang Zejun CHEN Yijun CHENG Hailin YANG Xuancheng HUO meng xiang Gai ZHOU Yuwen QIN Songnian FU Institute of Advanced Photonics Technology School of Information EngineeringGuangdong University of Technology School of Optical and Electronic Information Huazhong University of Science and Technology Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education of ChinaGuangdong University of Technology Guangdong Provincial Key Laboratory of Information Photonics Technology Guangdong University of Technology

To support the ever-emerging capacity requirement of datacenter interconnection(DCI) applications, transmitter dispersion eye closure quaternary(TDECQ) has been proposed by IEEE802.3 standard [1], which is specifically employed for the four-level pulse amplitude modulation(PAM-4) signals. However, the traditional scheme of TDECQ assessment needs several iterative operations,

关键词： IEEE Standards

Redox-Active Dihydrophenazine-Based Macrocycle:Synthesis,Conformation-Adaptive Behavior and Host-Guest Complexation with Tetracyanoquinodimethane

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2024年第16期42卷 1895-1900页

作者： Qiong-Yan Hong Bin Huang meng-xiang Wu Lin Xu Xiao-Li Zhao Xueliang Shi Hai-Bo Yang Shanghai Key Laboratory of Green Chemistry and Chemical Processes State Key Laboratory of Petroleum Molecular&Process EngineeringSchool of Chemistry and Molecular EngineeringEast China Normal University3663 N.Zhongshan RoadShanghai 200062China

A novel macrocycle based on conformation-adaptive and electron-rich dihydrophenazine was designed and *** the one hand,the macrocycle showed host-guest interactions with tetracyanoquinodimethane(TCNQ)driving by charge transfer interaction between ***,host-guest complexation was accompanied by fluorescence quenching and conformational change of the *** the other hand,the oxidation of the macrocycle resulted in its diradical cation analogue and induced the release of the guest molecule TCNQ,thereby accomplishing reversible binding ***,this work wellillustrates the chemical and structural versatility of dihydrophenazine in the synthesis of macrocycles and their host-guest chemistry.

关键词： Dihydrophenazine Macrocycle Conformational adaptation Redox-active Host-guest interactions Charge transfer interaction Organic radical Supramolecular chemistry

Algorithm of automatic identification of diabetic retinopathy foci based on ultra-widefield scanning laser ophthalmoscopy

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 Ophthalmology(English edition) 2024年第4期17卷 610-615页

作者： Jie Wang Su-Zhen Wang Xiao-Lin Qin meng Chen Heng-Ming Zhang Xin Liu meng-Jun xiang Jian-Bin Hu Hai-Yu Huang Chang-Jun Lan Aier Eye Hospital(East of Chengdu) Chengdu 610051Sichuan ProvinceChina Department of Ophthalmology Chengdu First People’s HospitalChengdu 610095Sichuan ProvinceChina School of Computer and Artificial Intelligence Southwest Jiaotong UniversityChengdu 610097Sichuan ProvinceChina Chengdu Aier Eye Hospital Chengdu 610041Sichuan ProvinceChina

AIM:To propose an algorithm for automatic detection of diabetic retinopathy(DR)lesions based on ultra-widefield scanning laser ophthalmoscopy(SLO).METHODS:The algorithm utilized the FasterRCNN(Faster Regions with CNN features)+ResNet50(Residua Network 50)+FPN(Feature Pyramid Networks)method for detecting hemorrhagic spots,cotton wool spots,exudates,and microaneurysms in DR ultra-widefield *** segmentation combined with a deeper residual network FasterRCNN+ResNet50 was employed for feature extraction to enhance intelligent learning *** fusion was carried out by the feature pyramid network FPN,which significantly improved lesion detection rates in SLO fundus ***:By analyzing 1076 ultra-widefield SLO images provided by our hospital,with a resolution of 2600×2048 dpi,the accuracy rates for hemorrhagic spots,cotton wool spots,exudates,and microaneurysms were found to be 87.23%,83.57%,86.75%,and 54.94%,***:The proposed algorithm demonstrates intelligent detection of DR lesions in ultra-widefield SLO,providing significant advantages over traditional fundus color imaging intelligent diagnosis algorithms.

关键词： diabetic retinopathy ultra-widefield scanning laser ophthalmoscopy intelligent diagnosis system

Targeting GPR65 alleviates hepatic inflammation and fibrosis by suppressing the JNK and NF-κB pathways

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Military Medical Research 2024年第4期11卷 500-520页

作者： Kun Zhang meng-Xia Zhang Xiao-xiang meng Jing Zhu Jia-Jun Wang Yi-Fan He Ye-Hua Li Si-Cong Zhao Zhe-Min Shi Li-Na Zheng Tao Han Wei Hong Department of Histology and Embryology School of Basic Medical SciencesTianjin Medical UniversityTianjin 300070China Department of Hepatology and Gastroenterology Tianjin Union Medical CenterTianjin Medical UniversityTianjin Union Medical Center Affiliated to Nankai UniversityTianjin 300000China

Background:G-protein coupled receptors(GPCRs)are recognized as attractive targets for drug ***,it remains poorly understood how GPCRs,except for a few chemokine receptors,regulate the progression of liver ***,we aimed to reveal the role of GPR65,a proton-sensing receptor,in liver fibrosis and to elucidate the underlying ***:The expression level of GPR65 was evaluated in both human and mouse fibrotic ***,Gpr65-deficient mice were treated with either bile duct ligation(BDL)for 21 d or carbon tetrachloride(CCl4)for 8 weeks to investigate the role of GPR65 in liver fibrosis.A combination of experimental approaches,including Western blotting,quantitative real-time reverse transcription-polymerase chain reaction(qRT-PCR),and enzyme-linked immunosorbent assay(ELISA),confocal microscopy and rescue studies,were used to explore the underlying mechanisms of GPR65’s action in liver ***,the therapeutic potential of GPR65 inhibitor in the development of liver fibrosis was ***:We found that hepatic macrophage(HM)-enriched GPR65 was upregulated in both human and mouse fibrotic ***,knockout of Gpr65 significantly alleviated BDL-and CCl4-induced liver inflammation,injury and fibrosis in vivo,and mouse bone marrow transplantation(BMT)experiments further demonstrated that the protective effect of Gpr65knockout is primarily mediated by bone marrow-derived macrophages(BMMs).Additionally,in vitro data demonstrated that Gpr65 silencing and GPR65 antagonist inhibited,while GPR65 overexpression and application of GPR65 endogenous and exogenous agonists enhanced the expression and release of tumor necrosis factor-α(TNF-α),interleukin-6(IL-6)and transforming growth factor-β(TGF-β),all of which subsequently promoted the activation of hepatic stellate cells(HSCs)and the damage of hepatocytes(HCs).Mechanistically,GPR65 overexpression,the acidic pH and GPR65 exogenous agonist induced up-regulation of

关键词： GPR65 Hepatic fibrosis Hepatic macrophages Inflammation c-Jun N-terminal kinase Nuclear factorκB

维普期刊数据库

Ultrahigh strength and improved electrical conductivity in an aging strengthened copper alloy processed by combination of equal channel angular pressing and thermomechanical treatment

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2024年第6期31卷 1823-1837页

作者： WANG Xu LI Zhou meng xiang-peng XIAO Zhu School of Materials Science and Engineering Central South UniversityChangsha 410083China Ningbo Boway Alloy Material Co. Ltd.Ningbo 315135China Key Laboratory of Non-ferrous Metal Materials Science and Engineering(Ministry of Education) Changsha 410083China

In this paper,equal channel angular pressing and thermomechanical treatment was employed to improve the strength and electrical conductivity of an aging strengthened Cu-Ti-Cr-Mg alloy,and the microstructure and properties of the alloy were investigated in *** results showed that the samples deformed by the combination of cryogenic equal channel angular pressing(ECAP)and rolling had good comprehensive properties after aging at 400℃.The tensile strength of the peak-aged and over-aged samples was 1120 MPa and 940 MPa,with their corresponding electrical conductivity of 14.7%IACS and 22.1%IACS,*** and cryogenic rolling introduced high density dislocations,leading to the inhibition of the softening effects and refinement of the *** a long time aging at 400℃,the alloy exhibited ultra-high strength with obvious increasing electrical *** high strength was attributed to the synergistic effect of work hardening,grain refinement strengthening and precipitation *** precipitation of a large amount of Ti atoms from the matrix led to the high electrical conductivity of the over-aged sample.

关键词： Cu-Ti alloy equal channel angular pressing rolling aging treatment high strength

维普期刊数据库

Variety classification and identification of maize seeds based on hyperspectral imaging method

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2024年

作者： XUE Hang XU Xiping meng xiang College of Optoelectronic Engineering， Changchun University of Science and Technology College of Electronic and Information Engineering， Beihua University

In this study， eight different varieties of maize seeds were used as the research objects. Conduct 81 types of combined preprocessing on the original spectra， through comparison， SG-MSC-MN was identified as the optimal preprocessing technique. CARS， SPA， and their combined methods were employed to extract feature wavelengths. Classification models based on BP， SVM， RF， and PLS were established using full-band data and feature wavelengths. Among all models， the (CARS-SPA)-BP model achieved the highest accuracy rate of 98.44%. This study offers novel insights and methodologies for the rapid and accurate identification of corn seeds as well as other crop seeds.

关键词：

Differential mode-gain equalization via femtosecond laser micromachining-induced refractive index tailoring

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Light(Advanced Manufacturing) 2024年第2期5卷 24-32页

作者： Cong Zhang Senyu Zhang Yan Zeng Yue Wang meng xiang Di Lin Songnian Fu Yuwen Qin Institute of Advanced Photonics Technology School of Information EngineeringGuangdong University of TechnologyGuangzhou510006China Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education of ChinaGuangdong University of TechnologyGuangzhou510006China Guangdong Provincial Key Laboratory of Information Photonic Technology Guangdong University of TechnologyGuangzhou 510006China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan430074China

The mode-division multiplexing technique combined with a few-mode erbium-doped fiber amplifier(FM-EDFA)demonstrates significant potential for solving the capacity limitation of standard single-mode fiber(SSMF)transmission ***,the differential mode gain(DMG)arising in the FM-EDFA fundamentally limits its transmission capacity and ***,an innovative DMG equalization strategy using femtosecond laser micromachining to adjust the refractive index(RI)is *** mode-dependent attenuations can be achieved according to the DMG profile of the FM-EDFA,enabling DMG *** validate the proposed strategy,DMG equalization of the commonly used FM-EDFA configuration was *** results revealed that by optimizing both the length and RI modulation depth of the femtosecond laser-tailoring area,the maximum DMG(DMGmax)among the 3 linear-polarized(LP)mode-group was mitigated from 10 dB to 1.52 dB,whereas the average DMG(DMGave)over the C-band was reduced from 8.95 dB to 0.78 ***,a 2-LP mode-group DMG equalizer was experimentally demonstrated,resulting in a reduction of the DMGmax from 2.09 dB to 0.46 dB,and a reduction of DMGave over the C band from 1.64 dB to 0.26 dB,with only a 1.8 dB insertion ***,a maximum range of variable DMG equalization was achieved with 5.4 dB,satisfying the requirements of the most commonly used 2-LP mode-group amplification scenarios.

关键词： Mode-division multiplexing Few-mode Erbium-doped fiber amplifier Differential mode gain Femtosecond laser micromachining