Deep Learning-Based Modulation Detection for NOMA Systems

( Wenwu Xie ),( Jian Xiao ),( Jinxia Yang ),( Ji Wang ),( Xin Peng ),( Chao Yu ),( Peng Zhu ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.2

Since the signal with strong power need be demodulated first for successive interference cancellation (SIC) receiver in non-orthogonal multiple access (NOMA) systems, the base station (BS) need inform the near user terminal (UT), which has allocated higher power, of the far UT’s modulation mode. To avoid unnecessary signaling overhead of control channel, a blind detection algorithm of NOMA signal modulation mode is designed in this paper. Taking the joint constellation density diagrams of NOMA signal as the detection features, the deep residual network is built for classification, so as to detect the modulation mode of NOMA signal. In view of the fact that the joint constellation diagrams are easily polluted by high intensity noise and lose their real distribution pattern, the wavelet denoising method is adopted to improve the quality of constellations. The simulation results represent that the proposed algorithm can achieve satisfactory detection accuracy in NOMA systems. In addition, the factors affecting the recognition performance are also verified and analyzed.

MMP-2-responsive fluorescent nanoprobes for enhanced selectivity of tumor cell uptake and imaging

Sun, Lu,Xie, Shuping,Ji, Xiuru,Zhang, Jingming,Wang, Dongmei,Lee, Seung Jin,Lee, Hyukjin,He, Huining,Yang, Victor C. The Royal Society of Chemistry 2018 Biomaterials Science Vol.6 No.10

<P>It is difficult to develop highly selective substrate-based fluorescent nanoprobes for specific matrix metalloproteinases (MMPs) due to overlapping substrate specificities among the family of MMP enzymes. To resolve this issue, we have developed novel fluorescent nanoprobes that are highly selective for soluble MMP-2. Herein, MMP-2-responsive nanoprobes were prepared by immobilizing fluorescent fusion proteins on nickel ferrite nanoparticles <I>via</I> the His-tag nickel chelation mechanism. The fusion protein consisted of a fluorescent mCherry protein with a cell penetrating peptide (CPP) moiety. An MMP-2 cleavage site was also introduced within the fusion protein, which was directly linked to the nickel ferrite nanoparticles. The selectivity of nanoprobes was modulated by hiding the cleavage site of MMP-2 substrates deeply inside the system, which could result in strong steric hindrance between the nanoprobes and MMPs, especially for membrane-tethered MMPs such as MMP-14. A cell-based assay demonstrated that the nanoprobes could only be activated by tumor cells secreting soluble MMP-2, but not membrane-tethered MMP-14. To further evaluate the contribution of the steric hindrance effect on the nanoprobes, a truncated recombinant MMP-14 was employed to confer their cleavage activity as compared to native membrane-tethered MMP-14. Furthermore, a designed probe with a diminished steric hindrance effect was proved to be activated by membrane-tethered type MMP-14. The results indicated that the design of fluorescent nanoprobes employing the steric hindrance effect can greatly enhance the selectivity of MMP-responsive nanoprobes realizing the specific detection of soluble MMP-2 in a tumor microenvironment. We believe that highly selective MMP-2-responsive fluorescent nanoprobes have broad impacts on biomedical applications including molecular imaging and labeling for tumor detection.</P>

UWB Bi-directional Bow-tie Antenna Loaded by Rings

Lin Peng,Kai Sun,Ji-yang Xie,Yu-jie Qiu,Xing Jiang 한국물리학회 2016 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.69 No.1

Performances of bow-tie antennae can be improved by loading a ring. Specially, the distorted radiation patterns of the reference bow-tie antenna (RBA) at high frequencies become less distorted when a ring is added. That is due to the disciplined current flows trained by the ring. Furthermore, when more rings are loaded, which act as reflectors, higher directivities are obtained and, patterns become bi-directional. Antennae with no ring (RBA), one ring, two rings (three cases), three rings, and four rings are investigated. Research find that loading more rings means better directivity. The directivity of the RBA varies from 2.29 dB to 3.66 dB for the frequency band from 2.5 to 7.5 GHz while the directivity for the four-ring-loaded case varies from 4.27 dB to 7.61 dB in that frequency band.

Role of B-doping in g-C3N4 nanosheets for enhanced photocatalytic NO removal and H2 generation

Xiang Xia,Cong Xie,Baogang Xu,Xingshuai Ji,Guanggang Gao,Ping Yang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.105 No.-

The photocatalytic application of graphic carbon nitrate (g-C3N4) was limited due to the shortcomings offew exposed active sites and serious recombination rate of photo-generated carrier. In this paper, Bdopedg-C3N4 nanosheets were synthesized by a two-step thermal polymerization method. AspreparedB-doped g-C3N4 nanosheets maintained the initial structure of g-C3N4. The composition analysisresults indicated the successful introduction of B element into the g-C3N4 structure. Under visible lightirradiation, as-prepared B-doped g-C3N4 nanosheets revealed excellent NO removal and hydrogen productionperformance, reaching 54% and 1639.29 lmol/g/h, respectively. The superior photocatalytic performancewas attributed to the ultrathin nanosheets obtained by thermal exfoliation, which have higherspecific surface area and more active sites. The introduction of B enhanced the charge migration and inhibitsthe recombination of photogenerated carriers. The cyclic experiment indicated that the sampleexhibited high stability. Enhanced photocatalytic mechanism from B doping was discussed.

Preparation of solid acid catalyst packing AAO/SBA-15-SO3H and application for dehydration of xylose to furfural

Derun Hua,Mingde Yang,Yulong Wu,PanPan Li,Yu Chen,Jie Dang,Quanhua Xie,Ji Liu,Xiao-yin Sun 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4

The solid acid catalyst packing AAO/SBA-15-SO3H was prepared by the co-condensation and grafting method with porous anodic aluminum oxide (AAO) as support. FT-IR, SEM and TEM were applied to characterize the prepared samples. Results showed that catalysts prepared by two methods both contained active centers, and SBA-15 nanorod arrays grow inside a porous alumina membrane AAO and are perpendicular to the substrate. Their catalytic performances were tested for dehydration of xylose to furfural. The conversion of xylose and selectivity of furfural were 90% and 74% on the AAO/SBA-15-SO3H(C) catalyst prepared by the co-condensation method, respectively. The deactivation and regeneration of the AAO/SBA-15-SO3H(C) catalyst for the dehydration of xylose were also investigated,the activity of catalyst treated by 30 wt.% H2O2 almost was recovered.

ZNF435, a Novel Human SCAN-containing Zinc Finger Protein, Inhibits AP-1-mediated Transcriptional Activation

Xing Gu,Mei Zheng,Xiangwei Fei,Zhenxing Yang,Fan Li,Chaoneng Ji,Yi Xie,Yumin Mao 한국분자세포생물학회 2007 Molecules and cells Vol.23 No.3

A self-assembly and stimuli-responsive fusion gelonin delivery system for tumor treatment

Quan Liu,Lu Zhang,Xiuru Ji,Meong Cheol Shin,Shuping Xie,Baoyan Pan,Fei Yu,Jingwen Zhao,Victor C. Yang 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.89 No.-

Ribosome-inactivating proteins (RIPs) are potent protein toxins for cancer therapy, and they have strongability to inhibit protein synthesis and induce cell death via inactivation of ribosomes in eukaryotic cells. However, the delivery of RIPs has been a challenging task due to their large molecular weight and lack oftargeting property. Low molecular weight protamine (LMWP), a transmembrane peptide, has beenproved to effectively promote transmembrane transportation, whereas the enzyme-activatable systemcan enhance the specificity by enhancing the tumor drug concentration through enzymatic reaction. Weherein constructed a self-assembly and stimuli-responsive fusion gelonin delivery system. Gelonin, atypical RIP protein, was assembled with nickel ferrite nanoparticles by self-assembling between hexa-histidine tag (His-tagged) and nickel ions. Both in vitro and in vivo results indicated that the magneticnanoparticle carriers and the applied linkers did not damage the pharmaceutical effect of gelonin, andthe whole drug delivery system showed good biocompatibility, sensitive selectivity, and significantlyenhanced cytotoxic activity. This in turn presented theranostic nanoparticles as efficient delivery vehiclefor clinical use.

Comparison of Liver Transplantation and Liver Resection for Hepatocellular Carcinoma Patients with Portal Vein Tumor Thrombus Type I and Type II

Jia-Yu Lv,Ning-Ning Zhang,Ya-Wei Du,Ying Wu,Tian-Qiang Song,Ya-Min Zhang,Yan Qu,Yu-Xin Liu,Jie Gu,Ze-Yu Wang,Yi-Bo Qiu,Bing Yang,Da-Zhi Tian,Qing-Jun Guo,Li Zhang,Ji-San Sun,Yan Xie,Zheng-Lu Wang,Xin 연세대학교의과대학 2021 Yonsei medical journal Vol.62 No.1

Purpose: The aim of this study was to compare the efficacy of liver transplantation (LT) and liver resection (LR) for hepatocellularcarcinoma (HCC) patients with portal vein tumor thrombus (PVTT) and to investigate risk factors affecting prognosis. Materials and Methods: A total of 94 HCC patients with PVTT type I (segmental PVTT) and PVTT type II (lobar PVTT) were involvedand divided into LR (n=47) and LT groups (n=47). Recurrence-free survival (RFS) and overall survival (OS) were comparedbefore and after inverse probability of treatment weighting (IPTW). Prognostic factors for RFS and OS were explored. Results: Two treatment groups were well-balanced using IPTW. In the entire cohort, LT provided a better prognosis than LR. Among patients with PVTT type I, RFS was better with LT (p=0.039); OS was not different significantly between LT and LR(p=0.093). In subgroup analysis of PVTT type I patients with α-fetoprotein (AFP) levels >200 ng/mL, LT elicited significantly longermedian RFS (18.0 months vs. 2.1 months, p=0.022) and relatively longer median OS time (23.6 months vs. 9.8 months, p=0.065). Among patients with PVTT type II, no significant differences in RFS and OS were found between LT and LR (p=0.115 and 0.335,respectively). Multivariate analyses showed treatment allocation (LR), tumor size (>5 cm), AFP and aspartate aminotransferase(AST) levels to be risk factors of RFS and treatment allocation (LR), AFP and AST as risk factors for OS. Conclusion: LT appeared to afford a better prognosis for HCC with PVTT type I than LR, especially in patients with AFP levels>200 ng/mL.