27 Result(s)
within
Luqing Zhang
English
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Article
A hypothesis for crack free interior surfaces of Longyou caverns caved in argillaceous siltstone 2000 years ago
Five complete caverns were discovered in Longyou in 1992. They were manually caved in argillaceous siltstone at shallow depths more than 2000 years ago. When they were un-watered, their integrity was maintaine...
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Article
VEGFR-3 ligand-binding and kinase activity are required for lymphangiogenesis but not for angiogenesis
Although VEGFR-3 deficiency disrupts blood vascular development during early embryogenesis, the underlying mechanism was not clear. To characterize its function in angiogenesis and lymphangiogenesis, we employ...
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Article
Weathering rates of a sandstone structure in a semi arid environment: a case study of the ancient city of **yao (world cultural heritage), China
The values of surface recessions of sandstones in the bottom walls of the ancient World Heritage City of **yao were measured using a specially designed movable instrument with the precision of 0.0143 mm. Sev...
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Article
Synthesis and Surface Activities of Novel Monofluoroalkyl Phosphate Surfactants
Two novel environmentally friendly fluorinated surfactants, disodium monofluoroalkyl phosphates were synthesized using phosphorus pentoxide, i.e. H(CF2)6CH2OPO(ONa)2 and H(CF2)6CH2OCH2CH2OPO(ONa)2. The novel synt...
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Article
Waterproof of rock joint with lead strip for splitting tuff sheet in ancient China quarrying caverns
This paper presents the relics of rock joints caulked with lead strips, unearthed by the authors in 2007 and 2008. The relics were in ancient quarry caverns in Shepan Island, Zhejiang Province, eastern China. ...
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Field investigation and rockfall hazard zonation at the Shi**g Mountains Sutra caves cultural heritage (China)
Sutra inscriptions have been a main means for Buddhistic monks to pass on their teachings. Nine Sutra caves used to store about 5,000 Pleromas carved during the Sui Dynasty of China, more than 1,000 years ago,...
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Synthesis and Surface Activities of Novel Succinic Acid Monofluoroalkyl Sulfonate Surfactants
Two environmentally friendly succinic acid monofluoroalkyl sulfonate surfactants were synthesized from maleic anhydride and polyethylene glycol mono (1H,1H,7H-dodecafluoroheptyl) ether, i.e. H(CF2)6CH2OCH2CH2OCOC...
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Article
Regional landslide susceptibility zoning with considering the aggregation of landslide points and the weights of factors
In this paper, we propose a methodology for landslide susceptibility assessment at a regional scale in Yunnan, southwestern province of China. A landslide inventory map including 3,242 landslide points was pre...
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Article
Uncertainty assessment in quantitative rockfall risk assessment
This study shows a quantitative rockfall risk assessment (QRA) for a slope of the Feifeng Mountain (China), including an explicit assessment of the uncertainties. For rockfall risk analysis, the annual probabi...
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Comparison of rockfall susceptibility assessment at local and regional scale: a case study in the north of Bei**g (China)
This study shows a rockfall susceptibility assessment at local scale in north Bei**g of China, including the identification of rockfall sources onsite by terrain and rock discontinuities analysis and run-out ...
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Article
Synthesis and Surface Activities of Novel Succinic Acid Double-Tailed Sulfonate Fluorinated Surfactants
In this study, four environmentally friendly succinic acid double-tailed sulfonate fluorinated surfactants were synthesized from maleic anhydride, fluoroalkyl alcohols, namely 1-(1H,1H,7H-Dodecafluoroheptyloxy) e...
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Article
Open AccessThe role of exopolymeric substances in the bioaccumulation and toxicity of Ag nanoparticles to algae
Exopolymeric substances (EPS) have an important role in bioaccumulation and toxicity of nanoparticles (NPs) to algae, which warrants specific studies. The interaction of EPS with citrate and polyvinyl pyrrolid...
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Article
The effect of oxidation on physicochemical properties and aqueous stabilization of multiwalled carbon nanotubes: comparison of multiple analysis methods
Surface oxidation can alter physicochemical properties of multiwalled carbon nanotubes (MWCNTs) and influence their aqueous stabilization. Many techniques have been used to characterize the physicochemical pro...
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Article
Numerical SPH analysis of debris flow run-out and related river damming scenarios for a local case study in SW China
A smoothed particle hydrodynamics (SPH) numerical modeling method implemented for the forward simulation of propagation and deposition of flow-type landslides was combined with different empirical geomorpholog...
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Article
Hydro-mechanically coupled finite-element analysis of the stability of a fractured-rock slope using the equivalent continuum approach: a case study of planned reservoir banks in Blaubeuren, Germany
Construction works associated with the building of reservoirs in mountain areas can damage the stability of adjacent valley slopes. Seepage processes caused by the filling and drawdown operations of reservoirs...
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Article
Free radical copolymerization of trifluoroethyl methacrylate with perfluoroalkyl ethyl acrylates for superhydrophobic coating application
The chemical constitution is a critical factor to the surface properties and the applications of polymers. In this paper, the random copolymers of trifluoroethyl methacrylate (FMA) and perfluoroalkyl ethyl acr...
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Article
The Steady-state Analysis of DC Distribution Network Embedded Droop Control and Power Flow Controller
Aiming at the DC distribution network based on the droop control, this paper proposes that the intersection of the internal characteristics of the node converter droop control and the external characteristics ...
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Article
10Be dating and seismic origin of Luanshibao rock avalanche in SE Tibetan Plateau and implications on Litang active fault
Moderate-large earthquakes usually trigger a large number of landslides. The prehistoric large landslides can be analyzed to determine the probability of its seismic origin, and further recognized as an indica...
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Article
Effect of low VEGF on lung development and function
Vascular endothelial growth factor (VEGF) is important for lung development and function but ideal mouse models are limited to decipher the quantitative relationship between VEGF expression levels and its prop...
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Article
A modeling study of the micro-cracking behavior of brittle crystalline rocks under uniaxial loading considering different scenarios of grain-based models
The grain-based model (GBM) in two-dimensional Particle Flow Code (PFC2D) is widely used to simulate the deformation and brittle failure of crystalline rocks. However, the original GBM consisting of the parall...
