[en] The authors investigate charged particle motion in temporal chaotic and spatiotemporal chaotic fields. In its steady wave frame a few key modes of the solution of the driven/damped nonlinear wave equation are used as the field. It is found that in the spatiotemporal chaotic field the particle drifts relative to the steady wave, in contrast to that in the temporal chaotic field where the particle motion is localized in a trough of the wave field. The result is of significance for understanding stochastic acceleration of particles

[en] Hetaoba area is located in the north margin of the north China plate, the southern part of the Daxinganling magmatic activity zone, is located in the transition zone between the ancient Asian ocean tectonic domain and the littoral Pacific tectonic domain, the area has frequent tectonic movement, accompanied by multiple magmatic activities, is a favorable location for uranium mineralization. It has been found that there are many holes in the uranium industrial ore and many ore bodies in the uranium industrial ore body have been delineated. However, the delineated uranium industrial ore bodies are basically dominated by single-hole ore control, and it is difficult to connect the ore bodies and clarify the uranium mineralization conditions. Concentrated collected in recent years in the work of the drilling data, detailed contrast each drilling lithology, physic-chemical characteristics, preliminary thought, Hetaoba area in the uranium ore body is mainly affected by rhyolitic porphyry vein, ore-forming materials for the period of late hydrothermal vein rock magma evolution, vein rocks after emplacement, makes the original north east to ring fracture closed space, ore-bearing hydrothermal precipitation along the sides of their deep vein or intra-pulse fissure metallogenic not upward migration; The fault structure extending from south to north in the zone cuts through the dike and orebody, and the uranium element moves up along the fault from the point of cut, and forms the secondary uranium anomaly halo at the surface, which is an important sign of ore prospecting. (authors)

[en] Through the comprehensive study of the geological background and uranium mineralization characteristics of the Weijing rock mass. The relationship between uranium source, structure, magmatism, hydrothermal alteration and other factors related to uranium mineralization was analyzed. The characteristics of ore-bearing surrounding rock, main ore-controlling structure, mineralization type and wall rock alteration, mineralization spatial distribution, diagenesis and metallogenic age are summarized. The granite-type uranium metallogenic model in the Weijing area is summarized. (authors)

[en] There are abundant fluorite and polymetallic mineral resources in Siziwang Banner, Inner Mongolia, with great potential of mineral resources. After three years of regional geological survey in this area, a large number of uranium, polymetallic ore sites and fluorite and fluorite ore (deposit) sites have been found. The relationship between fluorite, polymetallic and uranium mineralization has been roughly ascertained through comprehensive analysis of the distribution characteristics and genesis of various ore spots and deposits in the area. The fluorite deposits in this area are closely related to uranium mineralization, and they have high consistency in production location, occurrence horizon and metallogenic age; Polymetallic minerals are also related to uranium mineralization. (authors)

[en] This article through the analysis of uranium source condition, structure condition, strata and lithology, lithofacies conditions in the western Tengger depression of Erlian basin, figures out that the lower cretaceous in Saihan Fm is the main prospecting target, which includes a lot of diving-interlayer oxidation zone, these zones are favourable to find epigenetic hydrogenic uranium deposits. In addition, the Aqituwula depression, the Butumuji-Durimu depression and Eerdengsumu depression are favorable target area for searching leached sandstone-type uranium deposits. (authors)

[en] Hetaoba area is located in the polymetallic metallogenic belt in the northern margin of North China plate and Guyuan-Hongshanzi uranium metallogenic belt, and has found good uranium and polymetallic mineralization information, which has good prospects for uranium polymetallic exploration. In this paper, the existing exploration results are summarized, and then a series of research work is carried out from the field geological phenomena, macro-laws, micro-characteristics, chronology and geochemistry. The metallogenic regularity and spatial superposition relationship of uranium and lead, zinc and molybdenum polymetallic minerals in Hetaoba area are discussed. lt is considered that polymetallic mineralization and uranium are not formed in the same period, and polymetallic mineralization time is earlier; comparative study with similar regional uranium deposits and uranium mineralization points has been carried out, and uranium metallogenic model in Hetaoba area has been preliminarily summarized. It is considered that uranium metallogenesis is not synchronous with ore-hosting volcanic rocks, and uranium metallogenesis is closely related to a volcanic activity after the formation of ore-hosting volcanic rocks. (authors)

[en] In this paper, the numerical simulation method for the protection performance of liquid armor based on STF can be roughly summarized into two ways, containing the shell element simulation method based on the inter-yarns friction coefficient and the coupled Euler-Lagrangian simulation method. The shell element simulation method of inter-yarns friction coefficient has a single consideration for STF performance, but it has high calculation efficiency and low calculation cost. The coupled Euler-Lagrangian simulation method fully considers the shear thickening characteristics of STF, and comprehensively considers the characteristics of STF. The simulated performance gets closer to the actual situation, and it can also reveal the effect of STF in improving the protection performance. (paper)

[en] Abstract Background: A water-cooled high energy double Laue crystal monochromator (DLM) will be employed on ultra-hard applications beamline to be built in phase II project at Shanghai Synchrotron Radiation Facility (SSRF). Its crystal bending performance is very important for satisfying design requirements. Purpose: This study aims to find appropriate coupled meridional and sagittal bending of the bender, to obtain optimal the monochromatic beam flux and energy resolution. Methods: The rigidity matrix of the crystal was calculated by using MATLAB. Two main factors, anisotropic elasticity of the asymmetric-cut crystal and aspect ratio, are considered to optimize the crystal bendings by finite element analysis (FEA) using ANSYS Workbench. Results & Conclusion: Analysis results show the cutting edge of crystal length and width goes along the[011] and [0-11] direction, respectively. The optimized crystal geometry is 90 mm × 40 mm × 1 mm. Furthermore, the meridional and sagittal slope errors of the crystal are 3.02 μrad and 1.25 μrad, respectively, which meet the requirements well. (authors)

[en] Long-term γ-ray variability of a non-blazar Active Galactic Nucleus PKS 0521-36 is investigated by using Fermi Large Area Telescope (Fermi-LAT) pass 8 data covering from 2008 August to 2021 March. The results show that the histogram of the γ-ray fluxes follows a log-normal distribution. Interestingly, in the analysis of ∼5.8 yr (from MJD 56317–58447) LAT data between two outbursts (occurring during 2012 October and 2019 May respectively), a quasi-periodic oscillation (QPO) with a period of ∼1.1 yr (∼5σ of significance) is found in the Lomb–Scargle Periodogram (LSP), the Weighted Wavelet Z-transform, and the REDFIT results. This quasiperiodic signal also appears in the results of Gaussian process modeling the light curve. Therefore, the robustness of the QPO is examined by four different methods. This is the first γ-ray QPO found in a mildly beamed jet. Our results imply that the γ-ray outbursts play an important role in the formation of the γ-ray QPO.

[en] Highlights: • A soil washing solution (SWS) with high concentration of PAHs and TX-100 was tested. • The immobilized bacteria selectively degraded three PAH_S in SWS. • Beads with medium amount of NJS-1 immobilized can remove 77% PAHs from SWS in 96 h. • Beads provided protection for bacterial cells against toxic substances like TX-100. • In real SWS sample, beads can be partially reused to efficiently remove PAHs. Soil washing process enhanced by surfactants is a promising technique in removing organic pollutants from soil. In this work, a simultaneous sorption and biodegradation technique was used to remove 16 PAHs from a soil washing solution (SWS) obtained by rinsing a heavily contaminated soil from a coking plant with Triton X-100 (TX-100). This was done by immobilizing a pyrene-degrading bacterial strain in polyvinyl alcohol-sodium alginate (PVA-SA) hydrogel beads. Removal performance of free bacteria, blank PVA-SA beads and beads with immobilized degrading bacteria at a low, medium and high initial concentration was evaluated. The recycling and removal performance of the used beads were also examined. Our findings showed that hydrogel beads with immobilized bacteria at a medium concentration can remove around 77% ∑16PAHs from SWS in 96 h. The beads can be recycled and reused to treat a new SWS; 32–55% ∑16PAHs was removed in 24 h. The bead provided protection for bacteria against the co-existing substances such as TX-100. The bacteria-immobilized beads are more efficient and sustainable than free bacteria and blank beads due to simultaneous sorption and biodegradation processes, thus providing a solid reference for possible industrial application of bacteria immobilization technique to deal with SWSs with complex composition.