We investigate the probe-field transmission in a hybrid cavity quantum electrodynamic (CQED) system, where one optical cavity containing a quantum dot (QD) with high cavity dissipation is coupled to ...another auxiliary cavity with a high quality factor. We also investigate the hybrid system operating in the weak coupling regime of the light-matter interaction via comparing the QD photon interaction with the dipole decay rate and the cavity field decay rate. It is shown that the dipole induced transparency (DIT) regime similar to electromagnetically induced transparency (EIT) can be achieved due to the destructive interference of the cavity field in the weak coupling regime, which is extremely significant for the field of semiconductor CQED. The auxiliary cavity plays a key role in the hybrid system, which affords a quantum channel to affect the probe transmission leading to enhanced DIT. Further, DIT induced coherent optical propagation properties such as fast and slow light effects are also investigated based on the hybrid system for suitable parametric regimes. By controlling the coupling strength J and the decay rate ratio δ of the two cavities, tunable and controllable fast-to-slow light propagation can be achieved. This study provides a promising platform for understanding the dynamics of QD-CQED systems and may open up promising on chip applications in quantum information processing.
This paper summarizes the 2nd NTIRE challenge on stereo image super-resolution (SR) with a focus on new solutions and results. The task of the challenge is to super-resolve a low-resolution stereo ...image pair to a high-resolution one with a magnification factor of ×4. Compared with single image SR, the major challenge of this challenge lies in how to exploit additional information in another viewpoint and how to maintain stereo consistency in the results. This challenge has 3 tracks, including one track on distortion (e.g., PSNR) and bicubic degradation, one track on perceptual quality (e.g., LPIPS) and bicubic degradation, as well as another track on real degradations. In total, 175, 93, and 103 participants were successfully registered for each track, respectively. In the test phase, 21, 17, and 12 teams successfully submitted results with PSNR (RGB) scores better than the baseline. This challenge establishes a new benchmark for stereo image SR.
To compare the pharmacokinetic characteristics of brucine following intravenous administration of liposomes, containing total alkaloids from seed of Strychnos nux-vomica, to rats with different ...phospholipids composition.
Liposomes containing the total alkaloids were prepared by the method of ammonium sulfate transmembrane gradients and stealth liposome technique. The contents of total alkaloids and brucine in liposomes were determined and compared after free drug being removed. After intravenous administration of total alkaloids solution or liposomes with different composition, plasma samples were drawn at predetermined time points and the concentrations of brucine were determined by a validated method of HPLC. Pharmacokinetic analysis was performed by 3P97 program.
The ratios of brucine to total alkaloids in liposomes hardly varied with phospholipids composition. Compared with SPC liposome, AUC of brucine was increased 13.3-fold and apparent volume of distribution was decreased to only 3.6% following intravenous administration of HSPC liposome. In addition, besides that AUC of brucine was slightly increased, most pharmacokinetic parameters were not significantly changed after administration of the novel liposome compared with those of SPC liposome.
Phospholipids composition has a significant influence on the pharmacokinetics of brucine after intravenous administration of liposomes containing total alkaloids from seed of S. nux-vomica.
We present the peculiar in-plane velocities derived from the LAMOST red clump stars, which are purified and separated by a novel approach into two groups with different ages. The samples are mostly ...contributed around the Galactic anti-centre direction such that we are able to map the radial profiles of the radial and azimuthal velocities in the outer disc. From the variations of the in-plane velocities with the Galactocentric radius for the younger and older populations, we find that both radial and azimuthal velocities are not axisymmetric at \(8<R<14\,kpc\). The two red clump populations show that the mean radial velocity is negative within \(R\sim9\,kpc\) and positive beyond. This is likely because of the perturbation induced by the rotating bar. The cross-zero radius, \(R\sim9\)\, kpc, essentially indicates the rough location of the outer Lindblad resonance (OLR) radius. Given the circular speed of 238\,km\(\rm s^{-1}\), then the pattern speed of the bar can be approximated as \(45\)\,km\(\rm s^{-1}\rm kpc^{-1}\). The young red clump stars show larger mean radial velocity than the old population by about 3\(\,km\rm s^{-1}\) between \(R\sim9\) and 12\,kpc. This is possibly because the younger population is more sensitive to the perturbation than the older one. The radial profiles of the mean azimuthal velocity for the two populations show an interesting U-shape, i.e. at \(R<10.5\,kpc\), the azimuthal velocity declines with \(R\) by about 10\(\,km\rm s^{-1}\), while at \(R>10.5\) it increases with \(R\) to 240-245\(\,km\rm s^{-1}\). It is not clear why the mean azimuthal velocity shows the U-shape along the Galactic anti-centre direction. Meanwhile, the azimuthal velocity for the younger population is slightly larger than the older one and the difference moderately declines with \(R\). Beyond \(R\sim12\,kpc\), the azimuthal velocities for the two populations are indistinguishable.
To enhance the microwave absorption performance of silicon carbide nanowires（SiCNWs）, SiO_2 nanoshells with a thickness of approximately 2 nm and Fe_3O_4 nanoparticles were grown on the surface of ...SiCNWs to form SiC@SiO_2@Fe_3O_4 hybrids. The microwave absorption performance of the SiC@SiO_2@Fe_3O_4 hybrids with different thicknesses was investigated in the frequency range from 2 to 18 GHz using a free-space antenna-based system. The results indicate that SiC@SiO_2@Fe_3O_4 hybrids exhibit improved microwave absorption. In particular, in the case of an SiC@SiO_2 to iron（III） acetylacetonate mass ratio of 1：3, the microwave absorption with an absorber of 2-mm thickness exhibited a minimum reflection loss of-39.58 d B at 12.24 GHz. With respect to the enhanced microwave absorption mechanism, the Fe_3O_4 nanoparticles coated on SiC@SiO_2 nanowires are proposed to balance the permeability and permittivity of the materials, contributing to the microwave attenuation.
Bckground Stem cells, which have the ability to differentiate into insulin-producing cells （IPCs）, would provide a potentially unlimited source of islet cells for transplantation and alleviate the ...major limitations of availability and allogeneic rejection. Therefore, the utilization of stem cells is becoming the most promising therapy for diabetes mellitus （DM）. Here, we studied the differentiation capacity of the diabetic patient＇s bone marrow-derived mesenchymal stem cells （MSCs） and tested the feasibility of using MSCs for β-cell replacement.
Methods Bone marrow-derived MSCs were obtained from 10 DM patients （5 type 1 DM and 5 type 2 DM） and induced to IPCs under a three-stage protocol. Representative cell surface antigen expression profiles of MSCs were analysed by flow cytometric analysis. Reverse transcription-polymerase chain reaction （RT-PCR） was performed to detect multiple genes related to pancreatic β-cell development and function. The identity of the IPCs was illustrated by the analysis of morphology, ditizone staining and immunocytochemistry. Release of insulin by these cells was confirmed by immunoradioassay.
Results Flow cytometric analysis of MSCs at passage 3 showed that these cells expressed high levels of CD29 （98.28%）, CD44 （99.56%） and CD106 （98.34%）. Typical islet-like cell clusters were observed at the end of the protocol （18 days）. Ditizone staining and immunohistochemistry for insulin were both positive. These differentiated cells at stage 2 （10 days） expressed nestin, pancreatic duodenal homeobox-1 （PDX-1）, Neurogenin3, Pax4, insulin, glucagon, but at stage 3 （18 days） we observed the high expression of PDX-1, insulin, glucagon. Insulin was secreted by these cells in response to different concentrations of glucose stimulation in a regulated manner （P〈0.05）.
Conclusions Bone marrow-derived MSCs from DM patients can differentiate into functional IPCs under certain conditions in vitro. Using diabetic patient＇s own bone marrow-derived MSCs as a source of autologous IPCs for β-cell reDlacement would be feasible.
Recently, traditional erasure codes such as Reed-Solomon (RS) codes have been increasingly deployed in many distributed storage systems to reduce the large storage overhead incurred by the widely ...adopted replication scheme. However, these codes require significantly high resources with respect to network bandwidth and disk I/O during recovery of missing or unavailable data. It is referred as the recovery problem. In this paper, we dedicate to integrating exact minimum bandwidth regenerating codes into practical systems to solve the recovery problem. We design an implementation friendly storage code with the recently proposed BASIC framework and ZigZag decodable code for saving recovery bandwidth and disk I/O. We build a system called STORE based on this code and evaluate our prototype atop a HDFS cluster testbed with 21 nodes. As shown in this paper, the recovery bandwidth achieves minimum approximately during recovery of both data block and parity block with STORE. Another attractive result is that the recovery disk I/O also achieves minimum approximately during recovery of data block. Due to the reduction of recovery bandwidth and disk I/O, the degraded read throughput is boosted notably.
As the last line of defense of the micro-grid system, emergency control can maintain frequency stability after the system is greatly disturbed, which is of great significance to the stable operation ...of the micro-grid. This paper analyzes the problems that the frequency emergency control strategy and the round load reduction strategy in the micro-grid are difficult to set and cannot accurately reduce the load. A large-capacity independent micro-grid emergency control strategy is proposed: when the external disturbance causes the PCS output power to exceed the limit, the PCS power limit is calculated by taking into account the battery state of charge (SOC) balance control strategy, and the load is accurately cut off through the precise load shedding scheme. For the project implementation, the general object-oriented substation event (GOOSE) communication technology is adopted, and the small step trend change sampling algorithm and the one point large number algorithm are proposed to improve the response speed of the control system and improve the stability of large-capacity independent micro-grid operation. Finally, this paper introduces a case study of an independent micro-grid project in Xinjiang, verifies the feasibility and effectiveness of the proposed system.
Distributed file system has emerged in recent years as an efficient solution to store the large amount of data produced anytime and anywhere. In order to guarantee data reliability, it is necessary ...to introduce redundancy to the storage systems. Compared to simple replication, practical systems are increasingly adopting erasure codes for better storage efficiency. However, traditional erasure codes such as maximum-distance-separable (MDS) codes, are designed over a large finite field, which inevitably hinders the wide implementation of erasure codes. In this paper, we propose a new family of MDS codes with high computation efficiency. More specifically, only XOR operation is included in the encoding process to generate parity blocks. Upon failure of a storage node, we use the efficient Zigzag decoding method to recover the failed blocks, which achieves the optimal encoding and an efficient decoding. Furthermore, we implement the proposed codes in a distributed file system, and the results show the high performance of the new codes.
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