Search results for: Dongming Zhang

Items from 1 to 20 out of 163 results

article

Atramacrolodes A−D (1–4), Four Undescribed Eudesmane‐Type Sesquiterpenes from the Rhizome of Atractylodes macrocephala

Bei Li, Yulu Tian, Xinyi Guo, Yating Ren, more

Chemistry & Biodiversity > 21 > 8 > n/a - n/a

Four undescribed sesquiterpenes, atramacrolodes A−D (1–4), along with six known compounds 5–10 were isolated from the rhizome of Atractylodes macrocephala. Compound 3 possessed a new skeleton based on an unprecedented carton‐carton connection. Their structures were determined by UV, IR, HRESIMS, NMR spectra, ¹³C NMR calculation with DP4⁺ analysis, and the comparison of experimental and calculated...

article

Narrow‐linewidth injection‐locked Ho:YAG laser by using thulium‐doped fiber laser as pumping source

Yunpeng Wang, Dong Yan, Xianghao Meng, Dongming Zhang, more

Microwave and Optical Technology Letters > 66 > 2 > n/a - n/a

We demonstrated a narrow‐linewidth Ho:yttrium aluminum garnet (YAG) injection‐locked laser by using a 1908 nm thulium‐doped fiber laser as a pumping source to generate 2.09 μm single‐frequency pulses. A compact single‐longitudinal‐mode nonplanar ring oscillator (NPRO) based on Ho:YAG material with a beam quality factor of 1.01 at the central wavelength of 2090.91 nm was considered as the seed source...

article

Fracture evolution and fracture mechanism of tunnel surrounding rock: A case study based on laboratory tests and theoretical analysis

Weijing Xiao, Dongming Zhang, Shujian Li, Jun Lu

Fatigue & Fracture of Engineering Materials & Structures > 46 > 7 > 2617 - 2638

To explore the fracture characteristics and fracture mechanism of the surrounding rock of straight‐walled arched tunnels, this study first carried out biaxial compression tests on rock samples and analyzed the disaster evolution characteristics under loading. Then, a stress distribution function was established using a complex function, and the distribution characteristics of the surrounding rock...

article

Deep learning‐based automatic detection of muck types for earth pressure balance shield tunneling in soft ground

Dongming Zhang, Lei Fu, Hongwei Huang, Huiming Wu, more

Computer‐Aided Civil and Infrastructure Engineering > 38 > 7 > 940 - 955

For the earth pressure balance shield, the muck can reflect soil information at the tunnel face to track the change in geologic conditions. Thus, this paper presents a general framework for automatic detection of muck types based on the on‐site surveillance camera using deep learning algorithms. A simplified muck classification method and the corresponding muck recognition criteria are proposed for...

article

Transverse deformational behaviors of segmental lining during shield tunneling: A case study

Jiaqi Chang, Hongwei Huang, Dongming Zhang, Huiming Wu, more

Structural Control and Health Monitoring > 29 > 11 > n/a - n/a

In order to better understand the deformational behaviors of lining segments during shield tunneling, a case study of the real‐time monitoring on the deformation of a constructing shield tunnel in Shanghai by using the wireless sensor network (WSN) is presented. Eight tilt WSN nodes are installed on two rings with monitoring frequency of 10 min right after the erection of the rings. The nodes monitor...

article

Effects of L‐carnitine supplementation on growth performance, histomorphology, antioxidant and immune function of Rhynchocypris lagowskii fed dietary fish oil replaced with corn oil

Sen Wang, Qi Yao, Ning Wang, Dongming Zhang, more

Aquaculture Research > 53 > 5 > 1981 - 1994

The effects of L‐carnitine (LC) and dietary lipid on the growth and health of farmed fish are still conflicting. This study aimed to explore the effects of LC supplementation and dietary fish oil replacement by corn oil on growth performance, antioxidant, immune function and histomorphology of Rhynchocypris Lagowskii. Six diets were evaluated as follows: dietary fish oil as 50% and 100% replacement...

article

Simultaneous determination of skimmin, apiosylskimmin, 7‐hydroxycoumarin and 7‐hydroxycoumarin glucuronide in rat plasma by liquid chromatography–Orbitrap mass spectrometry and its application to pharmacokinetics

Lijun Luo, Xiao Liu, Xiaoxu Jin, Yuke Liu, more

Biomedical Chromatography > 36 > 1 > n/a - n/a

The effective fraction of coumarin glycosides from Hydrangea paniculata Sieb (HP) has been under development for the treatment of chronic kidney disease for years. Skimmin and apiosylskimmin are the main coumarin glycosides of HP, and the major metabolites in rats are 7‐hydroxycoumarin (7‐HC) and 7‐hydroxycoumarin glucuronide (7‐HCG). In this study, a sensitive and reliable liquid chromatography–Orbitrap...

article

Thermal cracking characteristics and mechanism of sandstone after high‐temperature treatment

Weijing Xiao, Guo Yu, Haitao Li, Dongming Zhang, more

Fatigue & Fracture of Engineering Materials & Structures > 44 > 11 > 3169 - 3185

To study the thermal cracking characteristics and mechanism of sandstone after high‐temperature treatment, the pore size distribution and micromorphology of sandstone were observed by nuclear magnetic resonance and scanning electron microscopy. Then, based on the Weibull distribution theory, a thermal elastic mechanical model of random heterogeneous rock was established for the rock unit, the thermal...

article

Characteristic Dihydroagarofuran Sesquiterpenoids with Neuroprotective Effects from the Celastraceae Plant Tripterygium wilfordii

Fangyou Chen, Jing Wang, Yongming Luo, Chuangjun Li, more

Chinese Journal of Chemistry > 39 > 9 > 2547 - 2554

Ten new characteristic dihydroagarofuran sesquiterpenoids and three known ones were acquired from the Celastraceae plant Tripterygium wilfordii. Their structure characterizations were done through spectroscopic data, while compounds 10—12 were further confirmed by single crystal diffractions. Several dihydroagarofurans protected PC12 cells against H₂O₂‐induced cytotoxicity as detected by CCK8 assay...

article

Deep learning‐based classification and instance segmentation of leakage‐area and scaling images of shield tunnel linings

Shuai Zhao, Mahdi Shadabfar, Dongming Zhang, Jiayao Chen, more

Structural Control and Health Monitoring > 28 > 6 > n/a - n/a

This paper presents an approach for the integrated process of classification and instance segmentation of leakage‐area and scaling images from shield tunnel linings. For this purpose, the previously established dataset of leakage‐area images by the authors is enlarged by means of adding scaling ones. Afterwards, data augmentation is implemented to enrich the database in the classification dataset,...

article

Effects of dietary γ‐aminobutyric acid levels on the growth, serum biochemical indexes, immune‐related signalling molecules of Jian carp

Xiumei Chen, Chunshan Gao, Xiaoyan Du, He Xu, more

Aquaculture Research > 52 > 3 > 1096 - 1105

In order to evaluate the protect effects of γ‐aminobutyric acid (GABA) on the growth, serum biochemical indexes, immune‐related signalling molecules of Jian carp (Cyprinus carpio var. Jian), fish were randomly divided into 6 groups, which fed six diets with different GABA levels (0, 30, 60, 90, 120 and 150 mg/kg) for 8 weeks, respectively. The results indicated the following: body weight gain, specific...

article

Clinicopathological characteristics of lung cancer in patients with systemic sclerosis

Minjiang Chen, Xiaoyan Liu, Yan Xu, Qing Zhou, more

The Clinical Respiratory Journal > 14 > 12 > 1131 - 1136

Background and objectives Systemic sclerosis (SSc) is a connective tissue disorder (CTD) associated with an increased risk of malignancy including lung cancer (LC). Our objective was to provide a description of demographics and clinicopathological characteristics of LC patients with SSc. Methods Lung cancer patients with SSc admitted to Peking Union Medical College Hospital from January 2000 to...

article

The MOF/GO‐based derivatives with Co@CoO core‐shell structure supported on the N‐doped graphene as electrocatalyst for oxygen reduction reaction

Guangping Wu, Yao Nie, Dongsheng Zhang, Chao Zhang, more

Journal of the Chinese Chemical Society > 67 > 7 > 1189 - 1194

The development of nonprecious catalyst for oxygen reduction reaction (ORR) is important for the commercialization of the alkaline fuel cells (AFCs). Herein, we prepared a kind of Co‐based nanoparticles (NPs) with a core‐shell (Co@CoO) structure supported on the N‐doped graphene (Co@CoO/NG) as an efficient ORR catalyst via simply pyrolyzing the ZIF‐67 anchored on the synthesized graphene oxide (GO)...

article

Impact of Water Level Rise on Urban Infrastructures: Washington, DC, and Shanghai as Case Studies

Yanjie Zhang, Bilal M. Ayyub, Dongming Zhang, Hongwei Huang, more

Risk Analysis > 39 > 12 > 2718 - 2731

The observed global sea level rise owing to climate change, coupled with the potential increase in extreme storms, requires a reexamination of existing infrastructural planning, construction, and management practices. Storm surge shows the effects of rising sea levels. The recent super storms that hit the United States (e.g., Hurricane Katrina in 2005, Sandy in 2012, Harvey and Maria in 2017) and...

article

Modeling and Simulating a Battery for an Electric Vehicle Based on Modelica

Dongchen Qin, Jianjie Li, Tingting Wang, Dongming Zhang

Automotive Innovation > 2019 > 2 > 3 > 169-177

Battery is the key technology to the development of electric vehicles, and most battery models are based on the electric vehicle simulation. In order to accurately study the performance of LiFePO₄ batteries, an improved equivalent circuit model was established by analyzing the dynamic characteristics and contrasting different-order models of the battery. Compared to the traditional model, the impact...

article

miR‐15b‐5p ameliorated high glucose‐induced podocyte injury through repressing apoptosis, oxidative stress, and inflammatory responses by targeting Sema3A

Yanqin Fu, Chongxian Wang, Dongming Zhang, Xiaojing Chu, more

Journal of Cellular Physiology > 234 > 11 > 20869 - 20878

Podocyte damage is a hallmark of diabetic nephropathy (DN). Accumulating evidence indicates that microRNAs play important roles in the DN pathogenesis. This study aimed to explore the possible roles and underlying mechanisms of miR‐15b‐5p on high glucose (HG)‐triggered podocyte injury. We observed that miR‐15b‐5p declined dramatically in a time‐dependent manner in podocytes exposed to HG. In addition,...

article

Ni–SiO₂ nanoporous composite as an efficient electrocatalyst for the electrooxidation of hydrogen peroxide

Junjun Zhang, Dongming Zhang, Youzhi Liu

Journal of Materials Science: Materials in Electronics > 2019 > 30 > 15 > 13895- 13909

Nickel has attracted much attention as a cheap and readily available electrocatalyst towards the electrooxidation of hydrogen peroxide (H₂O₂). For the electrocatalytic reaction, the larger the surface area of the electrode, the more active sites can be provided, and the better the catalytic performance of the electrode can be achieved. In this paper, a three-dimensional (3D) porous electrode was successfully...

article

Effect of dietary l‐carnitine on growth performance and antioxidant response in Amur minnow (Phoxinus lagowskii Dybowskii)

Qiuju Wang, Sha Luo, Abdallah Ghonimy, Yuke Chen, more

Aquaculture Nutrition > 25 > 4 > 749 - 760

l‐carnitine (LC) is required for transporting long‐chain fatty acids into the mitochondria, where β‐oxidation takes place, and it works as an antioxidant molecule against reactive oxygen species. This study evaluated the effects of LC on the growth and antioxidant function of Amur minnow (Phoxinus lagowskii Dybowskii). Five isonitrogenous (380.4 g/kg) and isoenergetic (17.63 MJ/kg) diets were supplemented...

article

Experimental Study on Mechanical Properties, Acoustic Emission Energies and Failure Modes of Pre-cracked Rock Materials under Uniaxial Compression

Shujian Li, Dongming Zhang, Xin Bai, Xianmeng Zhang, more

Pure and Applied Geophysics > 2019 > 176 > 10 > 4519-4532

To better understand the basic properties and phenomena of compression failure in rock mass structures, a series of uniaxial compression tests on sandstone specimens was carried out using loading equipment, an acoustic emission system, a computed tomography scanning system and a high-speed video camera. The results showed that the fracture process of sandstone samples was divided into three stages:...

article

Anisotropic Mechanical Properties and the Permeability Evolution of Cubic Coal Under True Triaxial Stress Paths

Yubing Liu, Guangzhi Yin, Minghui Li, Dongming Zhang, more

Rock Mechanics and Rock Engineering > 2019 > 52 > 8 > 2505-2521

The geological sequestration of CO₂, underground coal mining, and coalbed methane production in deep coal reservoirs is executed under high levels of 3-D geo-stress, and it is accompanied by significant variations in both vertical and horizontal stresses. In addition, coal is a highly fractured porous medium characterized by complex natural fracture systems. This exterior and interior anisotropy complicates...

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INFONA - science communication portal

Search results for: Dongming Zhang

Atramacrolodes A−D (1–4), Four Undescribed Eudesmane‐Type Sesquiterpenes from the Rhizome of Atractylodes macrocephala

Narrow‐linewidth injection‐locked Ho:YAG laser by using thulium‐doped fiber laser as pumping source

Fracture evolution and fracture mechanism of tunnel surrounding rock: A case study based on laboratory tests and theoretical analysis

Deep learning‐based automatic detection of muck types for earth pressure balance shield tunneling in soft ground

Transverse deformational behaviors of segmental lining during shield tunneling: A case study

Effects of L‐carnitine supplementation on growth performance, histomorphology, antioxidant and immune function of Rhynchocypris lagowskii fed dietary fish oil replaced with corn oil

Simultaneous determination of skimmin, apiosylskimmin, 7‐hydroxycoumarin and 7‐hydroxycoumarin glucuronide in rat plasma by liquid chromatography–Orbitrap mass spectrometry and its application to pharmacokinetics

Thermal cracking characteristics and mechanism of sandstone after high‐temperature treatment

Characteristic Dihydroagarofuran Sesquiterpenoids with Neuroprotective Effects from the Celastraceae Plant Tripterygium wilfordii

Deep learning‐based classification and instance segmentation of leakage‐area and scaling images of shield tunnel linings

Effects of dietary γ‐aminobutyric acid levels on the growth, serum biochemical indexes, immune‐related signalling molecules of Jian carp

Clinicopathological characteristics of lung cancer in patients with systemic sclerosis

The MOF/GO‐based derivatives with Co@CoO core‐shell structure supported on the N‐doped graphene as electrocatalyst for oxygen reduction reaction

Impact of Water Level Rise on Urban Infrastructures: Washington, DC, and Shanghai as Case Studies

Modeling and Simulating a Battery for an Electric Vehicle Based on Modelica

miR‐15b‐5p ameliorated high glucose‐induced podocyte injury through repressing apoptosis, oxidative stress, and inflammatory responses by targeting Sema3A

Ni–SiO₂ nanoporous composite as an efficient electrocatalyst for the electrooxidation of hydrogen peroxide

Effect of dietary l‐carnitine on growth performance and antioxidant response in Amur minnow (Phoxinus lagowskii Dybowskii)

Experimental Study on Mechanical Properties, Acoustic Emission Energies and Failure Modes of Pre-cracked Rock Materials under Uniaxial Compression

Anisotropic Mechanical Properties and the Permeability Evolution of Cubic Coal Under True Triaxial Stress Paths

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