175 research outputs found
Experimental Study of Fast Sealing Airbag in Simulating Tunnel
AbstractAgainst problems in terms of stability, airtightness and so on of current fast sealing airbag, stability and airtightness of fast sealing airbag in simulating tunnel was studied through combining theoretical analysis and experiment. The ideal viton material is finally found after comparing and analyzing heat resistance, flame resistance, wear resistance, hardness and air permeability of different kinds of rubber. Sealing and wind blocking effects of airbags made from selected material are tested in simulating tunnel. Rate of air leakage and changing rate of wind pressure of each kind of rubber are also determined and further verified, with result that both indexes of viton material are the least, respectively only 4.25% and 4.66%
A single amino acid change to Taq DNA polymerase enables faster PCR, reverse transcription and strand-displacement
A change of an aspartic acid to asparagine of Taq
Fine-Grained Face Swapping via Regional GAN Inversion
We present a novel paradigm for high-fidelity face swapping that faithfully
preserves the desired subtle geometry and texture details. We rethink face
swapping from the perspective of fine-grained face editing, \textit{i.e.,
``editing for swapping'' (E4S)}, and propose a framework that is based on the
explicit disentanglement of the shape and texture of facial components.
Following the E4S principle, our framework enables both global and local
swapping of facial features, as well as controlling the amount of partial
swapping specified by the user. Furthermore, the E4S paradigm is inherently
capable of handling facial occlusions by means of facial masks. At the core of
our system lies a novel Regional GAN Inversion (RGI) method, which allows the
explicit disentanglement of shape and texture. It also allows face swapping to
be performed in the latent space of StyleGAN. Specifically, we design a
multi-scale mask-guided encoder to project the texture of each facial component
into regional style codes. We also design a mask-guided injection module to
manipulate the feature maps with the style codes. Based on the disentanglement,
face swapping is reformulated as a simplified problem of style and mask
swapping. Extensive experiments and comparisons with current state-of-the-art
methods demonstrate the superiority of our approach in preserving texture and
shape details, as well as working with high resolution images at
10241024.Comment: Project page, see http://e4s2022.github.i
Xylem ion balance in tomato plants under alkali stress
Abstract In many areas of China, alkalinity (high pH) had strongly limit crops productivity. Control of ion loading into the xylem has been repeatedly named as a crucial factor determining plant salt tolerance. To investigate the role of roots in alkali tolerance of tomato, we tested the ion balance in root xylem of alkali stressed tomato plants. Two alkaline salts (NaHCO 3 and Na 2 CO 3 ) were mixed in a 9:1 molar ratio as the alkali stress treatments. Under alkali stress condition or control condition, xylem sap samples were collected by cutting plant stems near to cotyledon vestige, and then all mineral elements in excreted xylem sap were measured. The results showed that alkali stress decreased the concentrations of K ; however, under both stresses ion concentrations in the xylem sap were similar, indicating that the uptakes of inorganic ions were inhibited by high-pH but not by Na +
Coexistence of ferromagnetism, antiferromagnetism, and superconductivity in magnetically anisotropic (Eu,La)FeAs2
Materials with exceptional magnetism and superconductivity usually conceive
emergent physical phenomena. Here, we investigate the physical properties of
the (Eu,La)FeAs2 system with double magnetic sublattices. The parent EuFeAs2
shows anisotropy-associated magnetic behaviors, such as Eu-related moment
canting and exchange bias. Through La doping, the magnetic anisotropy is
enhanced with ferromagnetism of Eu2+ realized in the overdoped region, and a
special exchange bias of the superposed ferromagnetic/superconducting loop
revealed in Eu0.8La0.2FeAs2. Meanwhile, the Fe-related antiferromagnetism shows
unusual robustness against La doping. Theoretical calculation and 57Fe
M\"ossbauer spectroscopy investigation reveal a doping-tunable dual
itinerant/localized nature of the Fe-related antiferromagnetism. Coexistence of
the Eu-related ferromagnetism, Fe-related robust antiferromagnetism, and
superconductivity is further revealed in Eu0.8La0.2FeAs2, providing a platform
for further exploration of potential applications and emergent physics.
Finally, an electronic phase diagram is established for (Eu,La)FeAs2 with the
whole superconducting dome adjacent to the Fe-related antiferromagnetic phase,
which is of benefit for seeking underlying clues to high-temperature
superconductivity.Comment: 13 pages, 6 figures for the main tex
- …