广州动物园草食类动物的饲养及其效果评价

广州动物园现有草食类动物36种,针对各种草食动物的习性特点,建立一套合理的饲养管理制度,筛选一批园养草食动物喜食的饲用植物,并建立了专用的草食动物饲草种植基地,保证各种园养草食动物的健康养殖及种群的稳定

人苯丙氨酸羟化酶基因克隆及其原核表达质粒的构建

[目的]克隆健康人苯丙氨酸羟化酶基因全长cDNA序列,构建并鉴定其原核表达质粒pTrcHisB/PAH。[方法]采用RT-PCR方法从人肝组织中扩增PAH基因全长cDNA,T/A克隆到pMD18-T载体中,双酶切后将cDA亚克隆入pTrcHisB载体,构建pTrcHisB/PAH质粒,经限制性内切酶鉴定并测序。[结果]人PAH基因cDNA正确克隆入pTrcHisB表达载体,与Genebank中PAH基因序列一致。[结论]成功构建pTrcHisB/PAH表达质粒,为进一步进行研究PAH蛋白表达和重组蛋白活性鉴定奠定基础

机器联觉:通信与多模态感知的智能融合

通信感知一体化技术局限于雷达感知与通信在频谱和硬件层面上的共享,不足以提升新兴应用场景中通信与感知的性能.在涵盖海量多模态感知和通信数据的场景中,通信感知一体化技术应向考虑多模态感知的方向进行范式演进,即通信与多模态感知的智能融合.受人类联觉现象启发,文中系统化建立并论述通信和多模态感知智能融合的范式——机器联觉.首先,总结机器联觉3种典型工作模式:唤起模式、增强模式、合作模式,系统全面给出通信和多模态感知之间相互辅助增强的目的与方式.然后,介绍机器联觉研究的数据基础(通信与多模态感知智能融合仿真数据集)和理论基础(通信与多模态感知联觉机理).最后,综述当前机器联觉的研究现状,并展望未来的研究方向. Integrated sensing and communications(ISAC) technique is limited to the sharing of radar sensing and communications at the spectrum and hardware levels, and it fails to enhance the performance of communication and sensing in future emerging application scenarios. In scenarios involving massive multi-modal sensing and communication data, ISAC should evolve towards the incorporation of multi-modal sensing, specifically intelligent multi-modal sensing-communication integration. Inspired by human synesthesia, a paradigm for intelligent multi-modal sensing-communication integration, synesthesia of machines (SoM), is systematically established and discussed in this paper. Firstly, three typical operational modes of SoM, SoM-evoke, SoM-enhance and SoM-concert, are systematically summarized, and thus the purposes and methods of the mutual assistance and enhancement between communications and multi-modal sensing are given comprehensively. Then, the data foundation of SoM research, mixed multi-modal sensing and communication(M3 SC) simulation dataset, and the theoretical foundation of SoM research, SoM mechanism, are also discussed. Finally, the current research status of SoM is reviewed and future research directions are prospected. © 2023 Journal of Pattern Recognition and Artificial Intelligence. All rights reserved

Amplitude analysis of the decays D0 → π+π−π+π− and D0 → π+π−π0π0*

Using e+e− annihilation data corresponding to an integrated luminosity of 2.93 fb−1 taken at the center-of-mass energy √s = 3.773 GeV with the BESIII detector, a joint amplitude analysis is performed on the decays D0 → π+π−π+π− and D0 → π+π−π0π0 (non-η). The fit fractions of individual components are obtained, and large interferences among the dominant components of the decays D0 → a1(1260)π, D0 → π(1300)π, D0 → ρ(770)ρ(770), and D0 → 2(ππ)S are observed in both channels. With the obtained amplitude model, the CP-even fractions of D0 → π+π−π+π− and D0 → π+π−π0π0 (non-η) are determined to be (75.2 ± 1.1stat. ± 1.5syst.) % and (68.9 ± 1.5stat. ± 2.4syst.)%, respectively. The branching fractions of D0 → π+π−π+π− and D0 → π+π−π0π0 (non-η) are measured to be (0.688 ± 0.010stat. ± 0.010syst.)% and (0.951 ± 0.025stat. ± 0.021syst.)%, respectively. The amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D0 → 4π when used to determine the CKM angle γ(φ3) via the B− → DK− decay

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^