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动物营养性贫血是一种常见的营养代谢病。通过对16只亚成年太平洋海象（Odobenus rosmarus divergens）4年来的血红蛋白检测和饲料营养分析对比发现：当亚成年太平洋海象蛋白质长期摄入不足时，容易患贫血症；不改善饲料结构，患贫血症的动物比例居高不下；通过增加食物中高蛋白质饵料鱼的比例，一年后患贫血症的比例由原来的68.75%降低到12.50%。调整饲料配比明显改善了亚成年太平洋海象的贫血状况，由此提示蛋白质长期摄入不足可能是造成亚成年太平洋海象患贫血症的主要原因。保证亚成年太平洋海象每天每公斤体质量摄入的蛋白质在4.71 g及以上时，有助于改善贫血状况，并有望使其血红蛋白恢复到正常范围。研究结果可为亚成年太平洋海象的营养需求提供理论支持，也为海洋濒危物种的保育提供有价值的参考。

基于数据驱动的方法在电力系统暂态稳定评估的效率和精度提升上已经取得了一些研究成果。然而电力系统暂态过程中涉及多维度时序特征的变化，常规算法对特征的提取能力不足且缺乏可解释性，难以反映系统暂态过程中的动态行为。因此，构建了一个具有双塔结构的Transformer模型，以Transformer编码器作为特征提取器，考虑同一时刻不同维度的特征以及每一维度特征在不同时间步对系统暂态稳定的影响，并将其分别作为双塔结构Transformer模型的输入，训练和学习各特征通道和时间步对系统暂态稳定性的影响。通过融合机制，建立了由系统特征到系统稳定性的端到端的映射模型，实现了暂态稳定高精度的评估，并通过注意力热图可视化解释模型的决策过程。最后，在IEEE-39节点系统验证了所提方法的有效性。

平面索网幕墙被广泛应用于大型公共建筑中，因具有阻尼小、刚度低、非线性强等特点，其在强风与地震作用下易出现索力突变、变形过大、面板损伤等不利现象。建立了索网幕墙系统的精细化数值模型，量化了风、地震作用下相邻主结构对幕墙动力性能的影响，分析了两种灾害共同作用下的索网动力响应及面板、密封胶安全状态，计算了幕墙的风振系数并与规范参考值进行对比。研究结果表明：考虑主结构影响的索网幕墙的频率平均减小了12 %，地震作用下中部拉索的峰值位移比为6.5，远大于风致响应，计算索网幕墙的地震响应时不可忽略主结构的影响。两种灾害共同作用时，索网位移的增幅大于索力的增幅，位移响应对外部激励变化更加敏感，且位于幕墙顶部的玻璃面板与密封胶的应力均超过设计强度，应在运维过程中予以重点关注。此外，对索网幕墙风致响应结果进行数理统计，得到了可供工程设计参考的风振系数。

2018—2022年，在吉林省长春市伊通河流域进行鸟类资源调查，记录到欧亚鸲（Erithacus rubecula；43°52′34.76″ N，125°21′52.74″ E）、灰蓝山雀（Cyanistes cyanus；43°52′33.61″ N，125°21′53.08″ E；43°49′18.99″ N，125°21′19.65″ E）、三趾鸥（Rissa tridactyla；43°48′44.02″ N，125°20′56.08″ E）、中白鹭（Ardea intermedia；43°57′46.09″ N，125°22′5.71″ E）和赤嘴潜鸭（Netta rufina；43°58′2.72″ N，125°22′4.42″ E；43°48′27.18″ N，125°20′49.41″ E）5种鸟类，并拍摄到野外照片。经查阅相关文献确认为吉林省鸟类分布新纪录。

能源互联网的建设不仅需要技术手段的支撑，更需要以价值为驱动激活各方主体参与，打造互惠共赢的能源生态圈。为此，从能源、信息和制度经济学的视角出发，深入分析能源互联网的价值创造机理、业态创新范式和发展战略选择。首先，剖析了能源互联网的价值创造机理，其本质是以多能融合突破孤立系统的边界，从而显著扩大资源优化配置的空间；通过信息技术使得能源系统更加有序，进而促进能源系统的“熵减”；通过能源互联网平台释放范围经济的巨大红利。其次，设计了基于共享经济机制、降低交易成本、激励共享共赢的能源互联网价值分配机制，谋划了能源互联网支撑智慧城市发展、支撑绿电追踪、支撑能源消费节能降耗、提升工业资产利用率、助力政府治理的新业态。最后，策划了以再电气化为核心目标、基于价值公平分配的数据共享、以数字孪生为平台的人工智能、以负荷调度替代需求侧响应、基于共享经济的能源互联网市场机制的发展战略。

利用粉末冶金方法制备了含不同质量分数铜铁预合金粉末的铜基摩擦材料，并在不同温度下对材料摩擦性能进行测试。结果表明：铜铁预合金粉末的引入使得铁元素在烧结后铜基体中及铜基体与其他组元界面处析出，阻碍了烧结，导致材料密度下降。存在于界面处的铁以及反应生成的珠光体成为硬质强化相，使得材料的磨损机理从纯铜基体时的黏着磨损向添加铜铁预合金粉末之后的磨粒磨损转变，导致摩擦系数先下降后上升。200～250 ℃为摩擦系数保持稳定的临界温度。当超过临界温度时，摩擦表面铜软化，其自润滑作用使得摩擦系数下降。含30%铜铁预合金粉末的铜基摩擦材料（质量分数）的摩擦磨损性能最佳，这是由于此时摩擦材料兼具铜良好的塑性以及生成的适量硬质相能够强化摩擦表面。

南非是非洲最具影响力的国家之一，也是全球主要温室气体排放国之一。随着全球气候变暖形势越发严峻以及本国优质煤炭资源日趋紧张，南非近年来开始积极推进能源低碳转型并提出2050年实现碳中和的减排目标。首先详细介绍了南非能源结构和碳排放现状，其次概述了南非碳中和目标的实现路径以及涉及电力、工业、交通运输、建筑、农林等领域的减排政策、规划和措施，并指出了所面临的主要困难和挑战。南非的相关实践对其他发展中国家具有重要的参考意义。

针对皮肤镜图像病灶难定位、病灶精准分割难以实现的问题，提出一种基于深度可分离卷积网络的皮肤镜图像病灶分割方法。首先对皮肤镜图像进行黑框移除和毛发移除处理，将图像中有碍确定病灶位置的人工噪声、天然噪声移除；然后在降噪处理的基础上，对图像进行形变、旋转，以扩充数据集；最后构建基于深度可分离卷积、空洞卷积的编解码分割模型，编码部分对图像进行特征提取，解码部分融合特征图，并对图像细节特征进行恢复。实验结果表明，该方法针对皮肤镜图像病灶分割问题可取得较好的分割效果，分割病灶的准确率达到95.24%，与分割模型U-Net相比，准确度提高了6.17%。

电网输配电网损引发的间接碳排放已被我国部分试点碳市场纳入管控。参与碳市场对电网企业而言是机遇也是挑战，电网作为服务低碳能源转型的减排平台，其网损水平并不完全取决于自身管理能力，网损水平的波动使得电网企业暴露于碳市场履约风险之下。前期已基于支持向量机方法，采用2012～2016年能源主管部门披露的某省有关数据，构建了网损统计分析模型。进一步根据某省发展规划构建多个未来发展假想场景，根据试点碳市场规则，对2017～ 2020年期间某省电网网损水平和碳排放配额仓位进行态势推演。基于碳排放配额仓位推演结果，进一步评估了配额跨期使用、碳抵消机制使用、碳市场灵活交易等碳资产管理措施在不同假想场景下的风险防控效果，提出了电网企业在具备不同技术条件和风险偏好时的碳资产管理策略。最后，针对现行电网行业碳排放配额分配方案，指出仍需进一步量化评估电网的减排平台作用，制定更为科学的配额分配方案。

预应力部分外包组合结构是预应力钢-混凝土组合结构的一种特殊形式,有自重轻、跨度大、截面尺寸小和节约材料等特性,能够很好地提高构件的承载力。对8根部分外包组合简支梁进行了承载力试验研究,其中包括6根预应力和2根普通部分外包组合简支梁。研究表明:横截面面积越大预应力部分外包钢的抗弯承载力越高;而且预应力部分外包组合简支梁相对与普通部分外包组合简支梁,抗弯承载力和变形能力有很大的提高。在试验研究的基础上,提出了预应力部分外包组合简支梁承载力建议计算公式,为预应力部分外包组合简支梁在建筑工程上的应用提供了较好的理论基础。

179摩天轮高179m,轮缘直径170m,建成后将成为世界最高的摩天轮。179摩天轮采用刚性轮辐(刚性桁架硬支臂)与钢索混合结构形式。大型摩天轮的安装方案与摩天轮的结构设计密切相关,因此,在结构设计阶段就必须制订合理的安装方案。179摩天轮采用立面旋转安装法安装,并对8个施工步独立静止状态进行有限元分析。借助有限元软件ANSYS来模拟分析计算硬支臂和轮缘安装后不同安装位置静止情况下的等效应力、挠度、结构屈曲,由计算结果可知,不同安装位置摩天轮的结构安全可靠。

摘要：【目的】探讨甲状腺乳头状癌的淋巴结转移规律，分析其影响因素。【方法】回顾性分析我院自2011年1月至 2015年12月手术治疗甲状腺乳头状癌病人375 例的临床资料，对其原发灶特点、淋巴结转移规律进行了总结。【结果】本组 患者均为甲状腺乳头状癌，颈部淋巴结总转移率为67.47%，中央组淋巴结转移率为64.27%，颈侧组淋巴结转移率为 36.53%。原发灶肿瘤直径大于1 cm、肿瘤突破包膜、侵犯肌肉时颈淋巴结转移发生率明显升高（P < 0.05）。【结论】甲状腺乳 头状癌最常见的淋巴结转移为中央组淋巴结，初次手术应常规清扫双侧中央组淋巴结，当肿块直径大于1 cm或癌肿突破甲 状腺包膜和/或侵犯肌肉时宜同时清扫同侧的颈侧组淋巴结。

对传输容量为16×40Gbit/s、传输距离为500～2 000km的DWDM（密集波分复用）系统进行了研究。分析了不同调制方式（CSRZ（载波抑制归零）码、DRZ（双二进制归零）码和MDRZ（改进的双二进制归零）码）、不同色散补偿方案（前置、后置和中间色散补偿）对系统传输性能的影响。仿真结果表明,当传输距离超过1 500km后,MDRZ码能够很好地抑制FWM（四波混频）效应,提高系统性能;中间色散补偿方案比前置色散补偿和后置色散补偿有更好的补偿效果。

传送网络正由传统光网络向智能光网络演进,文章提出了"广义全保护的动态自动交换光网络（ASON）"的概念,该网络可满足无阻塞的动态业务提供和对于任何网络失效的完全可生存性。文章还讨论了满足如上要求的数学算法模型,阐述了该网络的容量规划问题。

电路仿真对于电信网向分组交换网的平稳过渡有着重要意义。文章根据相关标准提出并实现了一种电路仿真专用芯片的设计方案,并对其中主要功能模块和关键算法作出了详细说明,包括一种全数字的自适应时钟恢复方法、动态深度缓冲算法等。目前该设计已经通过了验证和在实际网络环境中的测试。

文章提出了在100G以太网中可能用到的基于简化查找表的64B/66B编解码器方案,并完成了该编解码器的设计和实现;该编解码器对64B/66B的查找表进行了简化,程序设计中使用了并行处理和流水算法。测试结果表明,该编解码器的编解码速度快,可靠性高,能够满足高速数据处理的要求。

为了解决波分复用（WDM）网络中由于流量分布变化而导致网络中预配置P圈保护资源分配不准确的问题,提出了可重构P圈的概念,并建立了一种基于网络性能参数进行重新配置的P圈模型。在OPNET中搭建仿真平台,基于泛欧COST239网络拓扑结构,对提出的模型进行了验证。仿真结果表明,根据网络的变化重新计算优选P圈,可以降低网络的性能抖动,提高网络的保护资源利用率。

因特网的快速发展,促使各种应用及服务不断涌现。多协议标签交换（MPLS）作为一种非常灵活的载体,不仅可以传输数据,而且可以利用其在资源预留协议（RSVP）、服务质量（QoS）方面的优势提供语音及多媒体等方面的服务。文章首先介绍MPLS两种主流语音传输技术,进而与VoIP的传输性能进行了比较分析,最后探讨了VoMPLS存在的技术问题和VoMPLS将来的应用前景。

随着波分复用（WDM）技术的迅速发展和广泛应用,光网络中交叉连接的规模不断增大,网络结构也越来越复杂。为了降低WDM网络中光域传输和交换的成本,人们提出了波带交换（WBS）技术,并对此进行了大量的研究。文章介绍了部分WBS和多颗粒光交叉连接（MG-OXC）的基本概念,并提出了一种新型的MG-OXC结构。

40Gbit/sSDH设备中涉及大量的高速和超高速信号,文章从硬件设计角度分析了影响信号完整性的因素,并且从电源分配、传输线设计、串扰和电磁干扰4个方面加以阐述.

文章首先对软交换、信令网关和M3UA协议进行了介绍,然后讨论了M3UA协议的具体实现,采用模块化设计的思想,通过模块调用来完成M3UA在信令网关中的功能,最后简单介绍了M3UA的接口原语及网络安全的问题.

疏螺旋体病是鸡、火鸡、鹅和鸭的一种急性败血性传染病,这早有资料记载。但孔雀患螺旋体病尚属罕见,也未见报导。我地区公园90年初从外地引进孔雀4只,8月4日发病2只,8月5日死亡1只,相隔5天,第2只死亡。经临床观察,剖检变化及实验室检验,确诊为疏螺旋体病。现将诊疗情况报告如下。

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