-
Article
The ecological impacts of residues from the heap leaching of ion-adsorption rare earth clays
Heap leaching for rare earth elements poses a serious long-term threat to the adjacent ecological systems in mining areas. The purpose of this research is to thoroughly study the environmental effects of heap ...
-
Article
Open AccessRisk factors for progression of Urolith Associated with Obstructive Urosepsis to severe sepsis or septic shock
To analyze the risk factors for progression of urolith associated with obstructive urosepsis to severe sepsis or septic shock, we had done the retrospective cross-sectional study, which would facilitate the ea...
-
Article
Prognostic value of neutrophil–lymphocyte ratio in critically ill patients with cancer: a propensity score matching study
Neutrophil–lymphocyte ratio (NLR) has shown a good prognostic value in many different type of malignancies. The purpose of this study was to investigate the relationship between NLR and the outcome of critical...
-
Article
Enhanced thermoelectric performance of tin oxide through antimony do** and introducing pore structures
Antimony-doped tin oxide nanopowders were synthesized by the hydrothermal method. Porous antimony-doped tin oxide ceramics with variant porosity were obtained by controlling the spark plasma sintering temperat...
-
Article
Enhanced Thermoelectric Performance of Polythiophene/Carbon Nanotube-Based Composites
Binary polythiophene/multiwalled carbon nanotube (PTh/MWCNT) and ternary PTh/SnSe/MWCNT composites with different weight proportions have been successfully prepared by solution mixing, ultrasonic dispersion, a...
-
Article
Role of vacancy defects on the lattice thermal conductivity in In2O3 thermoelectric nanocrystals: a positron annihilation study
High purity \(\hbox {In}_2\hbox {O}_3\) ...
-
Article
Vacancy-mediated ferromagnetism in Co-implanted ZnO studied using a slow positron beam
Co \(^+\) + ...
-
Article
Analysis and test of a new MEMS micro-actuator
A large-deformation and low-voltage micro actuator is proposed in this paper to overcome the problems of high voltage and undersized deformation of electrostatic micro actuator. The principle of the proposed a...
-
Article
Reversible structural transition in spark plasma-sintered thermoelectric Zn4Sb3
Thermoelectric Zn4Sb3 prepared by spark plasma sintering (SPS) method has been studied by X-ray diffraction (XRD) and positron annihilation spectroscopy. A reversible structural transformation between β-Zn4Sb3 an...
-
Article
Erratum to: Experimental Investigation of Seepage Properties of Fractured Rocks Under Different Confining Pressures
-
Article
Geometric Phase of Time-Dependent Superconducting Qubit
Geometric phases are studied in terms of invariant operator for a time-dependent superconducting qubit. The results show that the geometric phase depends on the dipole interaction strength between the qubit an...
-
Article
Entanglement Dynamics and its Application for Two Qubits in Dissipative Environment
An entanglement dynamics of two dissipative qubits under different situation of initial conditions is studied. We find that the periodic disentanglement and entanglement results from the interaction between tw...
-
Article
An Experimental Investigation of Permeability Measurement of Water Flow in Crushed Rocks
Due to the high permeability of water flow in crushed rocks, flow catastrophes and water inrush accidents are apt to take place in the broken zones of aquifers in coal mining engineering. The pore, crack and f...
-
Article
Defects and acceptor centers in ZnO introduced by C+-implantation
ZnO single crystals were implanted with 280 keV C+ to a dose of 6 × 1016 cm−2. Positron annihilation measurements reveal a large number of vacancy clusters in the implanted sample. They further agglomerate into l...
-
Article
Reference values of bone mineral density and prevalence of osteoporosis in Chinese adults
We pooled bone mineral density (BMD) data published in 91 articles including 139,912 Chinese adults and then established a national-wide BMD reference database at the lumbar spine and femur neck for Chinese ad...
-
Article
Host shift capability of a specialist seed predator of an invasive plant: roles of competition, population genetics and plant chemistry
Acanthoscelides macrophthalmus is a seed predator that has become widely distributed along with its native host, Leucaena leucocephala (Mimosoideae), which is a neotropical leguminous tree and on...
-
Article
Fidelity and Entanglement with Environment Effect
A quantum entangling gate is investigated in dissipative system by considering input initial entangled two qubits. By analyzing the relation between the fidelity and the concurrence, we find that the fidelity ...
-
Article
Experimental Investigation of Seepage Properties of Fractured Rocks Under Different Confining Pressures
The effectiveness of transmitting underground water in rock fractures is strongly influenced by the widths of the fractures and their interconnections. However, the geometries needed for water flow in fracture...
-
Article
Broadband and ultra-thin terahertz metamaterial absorber based on multi-circular patches
An ultra-thin narrow-band metamaterial absorber (MA) based on a periodic array of circular metal patch is numerically proposed at terahertz frequencies. The MA could exhibit an absorption peak at 5.91 THz with...
-
Article
Effect of Platform Dimension on the Dendrite Growth and Stray Grain Formation in a Ni-Base Single-Crystal Superalloy
A model of typical turbine blade shape with different platforms was designed to study the nucleation and growth of stray grains in the platforms by both experimental investigation and a ProCAST simulation base...
