Search

目的旨在分析兰州市HIV/AIDS晚发现的时空聚集性特征及相关影响因素，明确兰州市HIV/AIDS晚发现高风险地区和时间趋势，为兰州市因地制宜地制定HIV/AIDS防治策略措施提供参考依据。方法选择兰州市2011-2018年间新报告的成年HIV/AIDS病例作为研究对象，研究中所需的数据资料来自兰州市疾病预防控制中心和兰州市统计年鉴。采用Bayes时空模型分析HIV/AIDS晚发现相对风险（RR）的时空分布特征及其影响因素。结果2011-2018年间兰州市新报告的HIV/AIDS病例共计1 984例，其中HIV/AIDS晚发现者有982例（49.5%），平均年龄为39.67岁，男性占90.9%。老年人和女性HIV/AIDS病例中晚发现的比例更高；城关区（51.1%）、安宁区（50.3%）和榆中县（51.9%）具有高于平均水平的HIV/AIDS晚发现比例；2011-2018年间兰州市总体的晚发现比例呈波动上升趋势。Bayes时空模型分析结果显示，兰州市HIV/AIDS晚发现风险在2011-2015年间波动变化，而在2015年后迅速上升，其RR（95%CI）从1.01（0.84，1.23）上升到1.11（0.77，1.97）；红古区和三个县的晚发现风险变化趋势与兰州市的总体变化趋势相似，而城关区和七里河区的晚发现风险呈下降趋势；晚发现相对风险大于1的区县包括：永登县（RR=1.07，95%CI：0.55，1.96）、西固区（RR=1.04，95%CI：0.67，1.49）、城关区（RR=2.41，95%CI：0.85，6.16）和七里河区（RR=2.03，95%CI：1.10，3.27）。冷热点分析结果显示城关区和七里河区为热点区。影响因素分析结果显示，随着人均GDP（RR=0.65，95%CI：0.35，0.90）和HIV/AIDS病例中的男性比例（RR=0.53，95%CI：0.19，0.92）的增高，HIV/AIDS晚发现的相对风险越低；而人口密度（RR=1.35，95%CI：1.01，1.81）越大，晚发现风险越高。结论兰州市的HIV/AIDS晚发现风险呈上升趋势，并且存在明显的地区差异特征；人均GDP、HIV/AIDS中男性比例和人口密度是HIV/AIDS晚发现的影响因素。因此，对于晚发现风险高和存在相关风险因素的区县，应重视并制定有针对性的HIV筛查和防治服务，降低HIV/AIDS晚发现比例和风险。

哺乳动物被毛微量元素和重金属元素含量能够反映其生活状态和栖息地状况，是环境监测中重要的生物化学指示物。对北京南海子和浙江临安两地麋鹿（Elaphurus davidianus）种群被毛中的10种重金属和34种微量元素进行测定，以期探讨麋鹿被毛微量元素和重金属含量在栖息环境监测中的可行性。结果表明：除Re元素外，其余43种元素在麋鹿被毛中均被检出，统计分析表明Li、Be、Sc、V、Co、Ga、Rb、Ir、Mo、Cd、Cs、Ba、La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、Tl、Bi、Th、U、Nb、Ta、Zr和Hf 34种元素为麋鹿被毛的特征元素；与北京南海子麋鹿种群相比，浙江临安麋鹿种群被毛中的微量元素Sr、In、Sb、W、Bi、U和重金属元素Zn、Cu、Cr、Pb、Cd含量更少，其余32种元素含量均高于北京南海子麋鹿种群；独立样本t检验分析表明，麋鹿被毛微量元素和重金属元素含量存在地域差异性，仅Cr（p=0.064）、Ni（p=0.769）、Mo（p=0.129）、Tl（p=0.065）、Zr（p=0.138）和Hf（p=0.057）6种元素差异不显著，其余37种元素差异均显著；北京南海子和浙江临安麋鹿种群的栖息环境和食物均未受到Zn、Cu、Cr、Pb、Cd、V、Co、Ni、Sb和Tl 10种重金属元素污染的威胁。研究表明，麋鹿被毛可作为栖息环境重金属污染的非损伤监测指示材料。

旨在为提高花椒油和藤椒油品质稳定性和预测其货架期提供参考，研究储存过程中花椒油和藤椒油风味品质变化。采用Schaal烘箱法探讨加速氧化过程中（0~35 d）花椒油和藤椒油的酸值、过氧化值、麻味物质及挥发性风味成分的变化。结果表明：加速氧化过程中花椒油和藤椒油的酸值（KOH）均满足国家限量标准（≤3 mg/g）,而过氧化值分别在15 d和20 d时超出国家限量标准（≤0.25 g/100 g）。花椒油和藤椒油分别加速氧化10 d和15 d时麻味物质总量损失率分别为5.86% 和10.42%，挥发性风味成分总量损失率分别为35.07%和70.01%；加速氧化结束时，花椒油和藤椒油中麻味物质总量和挥发性风味成分总量大幅减少，麻味物质总量损失率分别为37.15%和37.30%，挥发性风味成分总量损失率分别为82.03%和89.08%；对挥发性风味物质进行主成分分析(PCA)发现，未加速氧化的油与加速氧化后的油区分明显。花椒油和藤椒油在储存过程中麻味物质和香气成分存在着不同程度的损失，且长时间储存易氧化酸败，对产品风味品质影响较大。In order to provide reference for improving the quality stability and shelf life prediction of Zanthoxylum bungeanum Maxim. oil and Zanthoxylum armatum DC. oil, the flavor quality changes of the two oils during the storage process were studied.The Schaal oven method was used to study the changes in acid value, peroxide value, numbing substances and volatile flavor components of Z. bungeanum Maxim. oil and Z. armatum DC. oil within 35 d of accelerated oxidation. The results showed that the acid value of two oils both met the national limit standard (≤3 mgKOH/g) during the accelerated oxidation period, while the peroxide value of the two oils exceeded the national limit standard (≤0.25 g/100 g) after 15 d for Z. bungeanum Maxim. oil and 20 d for Z. armatum DC. oil. When Z. bungeanum Maxim. oil and Z. armatum DC. oil were oxidized for 10 d and 15 d, the loss rates of numbing substances and volatile flavor components were 5.86%,10.42% and 35.07%,70.01%, respectively.At the end of accelerated oxidation, the total amounts of numbing substances and volatile flavor components in Z. bungeanum Maxim. oil and Z. armatum DC. oil were greatly reduced, the loss rates of numbing substances were 37.15% and 37.30%, and the loss rates of volatile flavor components were 82.03% and 89.08%, respectively. The principal component analysis (PCA)of volatile flavor components found that the unoxidized oil could be clearly distinguished from the oxidized oil. During storage, the numbing substances and volatile flavor components in Z. bungeanum Maxim. oil and Z. armatum DC. oil have varying degrees of loss, and long-term storage is prone to oxidation and rancidity, which has a significant impact on the flavor quality of the product.

2020—2022年7月和8月，在长春一个废弃露天游泳池录制东亚伏翼（Pipistrellus abramus）捕食蜂鸣，同时使用扫网法收集昆虫样本，探究影响蝙蝠夜间活动的因素。每月开展6次试验，每次持续3 h。利用双尾t检验、单因素方差分析分别检验同一年不同月份、同一月份不同年际间游泳池水量、昆虫丰度和东亚伏翼捕食蜂鸣数量的差异显著性。采用多元回归分析，检验东亚伏翼捕食蜂鸣数量与泳池蓄水量、昆虫丰度的相关性。研究发现：泳池7月的平均蓄水量为10.39%，8月的平均蓄水量为81.61%，泳池在不同月份的蓄水量差异显著（t=-20.86，df=34，pp>0.05）。共录制到东亚伏翼的1 301个捕食蜂鸣，同一月份不同年际间捕食蜂鸣数量差异不显著（FJuly=0.34，pJuly>0.05；FAugust=0.86，pAugust>0.05）。整体上，8月捕食蜂鸣数量是7月的4.25倍（t=26.81，df=34， pt=27.89，pp>0.05）。研究结果表明丰水状态的废弃游泳池可能成为东亚伏翼的饮水场所，从而引起活动强度的变化，建议在泳池枯水状态时通过人工注水的方式为蝙蝠提供充足的水源，以维持伴人种蝙蝠种群的生存和繁衍。

目的了解兰州市HIV/AIDS报告病例相关特征的构成情况，分析艾滋病相关死亡的影响因素。方法通过收集兰州市2011-2019 年HIV/AIDS报告病例信息，采用生存分析方法，构建贝叶斯Cox风险比例回归模型分析影响死亡的相关因素。结果本研究共选取2 312例HIV/AIDS患者，其中艾滋病相关死亡45例。多因素回归结果显示，患者年龄越大，死亡风险越高；确诊时为AIDS患者的死亡风险是HIV感染者的13.91倍；与未接受CD4检测的患者相比，接受CD4检测的患者的死亡风险降低； 进行抗病毒治疗者的死亡风险是未进行抗病毒治疗者的0.22倍。结论确诊时年龄、病程阶段、是否接受抗病毒治疗是兰州市HIV/AIDS患者艾滋病相关死亡的影响因素，因此要加强艾滋病相关人群健康教育，提倡早发现、早诊断、早治疗，扩大艾滋病检测与治疗的覆盖面，延长艾滋病患者的生存时间。

推荐系统是解决社会媒体信息过载问题的重要手段。为了解决传统推荐系统无法优化用户长期体验的问题，研究人员提出了交互式推荐系统，并尝试使用深度强化学习优化推荐策略。但是，强化推荐算法面临反馈稀疏、从零学习影响用户体验、物品空间大等问题。为了解决上述问题，提出一种改进的知识增强策略引导的交互式强化推荐模型KGP-DQN。该模型构建行为知识图谱表示模块，将用户历史行为和知识图谱结合，解决反馈稀疏问题；构建策略初始化模块，根据用户历史行为为强化推荐系统提供初始化策略，解决从零学习影响用户体验的问题；构建候选集筛选模块，根据行为知识图谱上的物品表示进行动态聚类，从而减少物品空间，解决动作空间大的问题。在3个真实数据集上进行了实验，实验结果表明，KGP-DQN可以快速有效地对强化推荐系统进行训练，其在3个数据集上的推荐准确率均超过80%。

碳中和背景下，中美两国的竞合关系将显著影响全球气候行动。拜登政府上台后对内对外气候行动均锚定1.5 ℃目标，通过重返《巴黎协定》、召开领导人气候峰会等举措重新领导全球气候治理，重视气候投融资并多渠道寻求能源系统的多边合作。虽然应对气候变化有望成为中美目前极少数合作的亮点，但美国可能通过加强与传统盟友合作、酝酿碳边境调节机制等措施提高对中国气候行动的要价。中国可从加速制定“3060”双碳目标路线图、完善碳定价机制的国内行动，强调中美气候互利互信底线、拓展中欧气候合作深度的双边互动，以及加强南南合作、共建“绿色丝绸之路”的多边联动三方面行动加以应对。

2019年7月—2020年5月，应用红外相机技术基于公里网格布设方法首次对天津盘山风景名胜区哺乳动物和鸟类资源进行调查，共布设40台红外相机，总有效监测日为11886 d。结果表明：可确定野生动物的独立有效照片有2936张，其中哺乳动物和鸟类分别为5目8科13属13种和6目16科30属37种。哺乳动物中相对多度指数居前3位的是松鼠（Sciurus vulgaris）、蒙古兔（Lepus tolai）和岩松鼠（Sciurotamias davidianus）。鸟类中相对多度指数居前3位的是红嘴蓝鹊（Urocissa erythroryncha）、山噪鹛（Garrulax davidi）和环颈雉（Phasianus colchicus）。哺乳动物和鸟类的物种多样性指数均存在显著季节差异。

基于灵敏度矩阵分析的模型修正方法是目前最常用的模型修正方法之一。而在模型修正过程中,不可避免地存在求解过程的不适定性。不适定问题的求解中,正则化参数的选取对结果精度和效率都有重要影响。研究了基于灵敏度矩阵分析的钢桁架桥有限元模型修正工作,并对目前较常用的正则化参数选取方法——广义交叉验证(generalized cross validation,GCV)进行了研究。通过钢桁架桥模型的数值仿真分析,研究了采用GCV方法选取正则化参数进行模型修正方法的有效性和精度问题;并通过钢桁架桥试验验证了此方法的有效性。研究可以为钢桁架桥模型的修正工作提供参考。

基于现阶段关于PEC柱抗震性能方面研究的不足。以轴压比、钢材等级及加载方式为参数,设计制作了8个PEC柱1∶3缩尺模型并完成了低周往复加载试验。分析了试件的破坏形态、滞回耗能、承载能力、延性性能、强度退化、刚度退化等力学性能,研究结果表明:试件破坏形态为压弯破坏,滞回曲线基本呈对称的饱满梭形,具有良好的塑性变形及耗能能力。试件承载力随轴压比增加而增加,但同时也会造成延性性能变差。试件在等幅阶段多次循环及加大级差加载后的强度、刚度退化均相对稳定,承载力、耗能变化不大。单纯提高钢构件的强度并不能有效提高PEC柱的承载力,应注重钢材与混凝土的强度等级之间的匹配性,Q345钢不宜与强度等级低于C35的混凝土组合使用,为PEC柱构件在工程上的应用提供了参考。

对中、美、欧现行规范关于钢结构截面类型及宽厚比限值的要求进行了归纳比较,利用ABAQUS有限元软件进行了单根H形钢梁考虑初始缺陷的屈曲承载力分析并与规范公式计算结果进行了对比。在此基础之上,以雄安站站房雨棚钢结构为背景,选取具有代表性的区域建立空间交叉H形钢梁精细有限元模型。对不同板件宽厚比的空间交叉H形钢梁进行了非线性屈曲承载力分析,研究了翼缘宽厚比及腹板高厚比对空间交叉H形钢梁局部稳定性和屈曲性能的影响。研究结果表明:ABAQUS模型对钢梁整体稳定性计算结果与规范公式吻合度较高,设计中采用杆件单元模型进行结构整体稳定性分析是安全合理的。考虑翼缘约束作用的H形钢梁腹板屈曲计算模型与该项目交叉钢梁有限元弹性屈曲分析结果吻合良好,结构起坡所引起的不均匀正应力是导致钢梁腹板失稳的主要因素。翼缘厚度确定后,根据上翼缘失稳与腹板局部屈曲临界值确定腹板厚度,依据S3级截面要求所控制的次梁腹板厚度是经济合理的。

概述了平行城市的概念、框架、方法与应用。平行城市是基于 ACP 方法的平行智能在城市领域中的应用。实际城市和与之对应的虚拟空间中的人工城市平行运行、虚实互动，物理空间映射于虚拟空间，人工城市系统描述、预测、引导实际城市系统，虚实闭环，迭代优化，实现智慧城市管理的新模式。

考虑储能系统运行过程复杂的内在机制以及实时监控的要求，针对常规动态过程在线监控方法在特征提取和变量识别中的难点问题，结合PCA策略与KSICA方法，对储能系统测量数据进行PCA白化预处理，抵消各通道测量数据间的二阶相关性，建立核函数，提升快速性，有效解决ICA分离算法由于数据量大、迭代次数多引起收敛速度慢的问题。基于核函数的PCA-KSICA储能系统运行工况在线分析方法，不仅可实现复值域独立成分分析，完成时间空间非平稳状况下源信号的在线估计，且可在仅高斯变量情形下保持鲁棒性能，避免产生发散行为，将该方法用于储能系统工况的非线性多元特征提取，分析性能指标，在线运行结果验证了所提出方法的有效性和可行性。

【目的】调查慢性乙型肝炎病毒感染患者的主观睡眠现状。【方法】以2019年1月至6月中山大学附属第三医院门诊慢性乙型肝炎病毒感染患者353例，采用嗜睡量表、失眠程度量表、睡眠质量量表、焦虑自评表和抑郁自评表对患者进行评分，并按照睡眠情况分级标准进行分组，收集患者性别、年龄、疾病诊断、是否抗病毒治疗及文化程度资料，通过卡方检验及多因素logistic回归分析睡眠情况的影响因素。【结果】慢性乙型肝炎病毒感染患者总体嗜睡率为47.88%，总体失眠率为53.26%，6.8%的患者睡眠质量很差。嗜睡的危险因素为焦虑（P=0.000，OR=3.076，95%CI1.706~5.545），失眠的危险因素为焦虑（P=0.000，OR=14.693，95%CI5.046~42.782及抑郁（P=0.002，OR=2.279，95%CI1.340~3.877），睡眠质量差的危险因素为焦虑（P=0.000，OR=9.990，95%CI4.031~24.758）。【结论】慢性HBV感染患者出现主观睡眠障碍比例高，影响睡眠情况的主要因素为患者的心理状态，充分了解患者睡眠情况将有助于临床治疗。

目的】探讨异常子宫出血（AUB）的子宫内膜病理类型及其与患者的年龄、体质量指数、腰围、臀围和腰臀比等因素相关关系。【方法】收集2017年1月至6月在中山大学附属第三医院日间手术室因AUB进行诊断性刮宫或宫腔镜检查并子宫内膜活检的206名病人资料，包括年龄、身高、体质量、腰围、臀围、子宫内膜病理等，进行相关统计分析。【结果】①子宫内膜病理类型有增殖期或分泌期子宫内膜（NE），子宫内膜部分增殖、部分分泌改变（DPE），子宫内膜息肉（EP），子宫内膜增生改变和（或）增生过长（EHwithoutatypia），子宫内膜轻度、中度、重度不典型增生（EHwithatypia），和子宫内膜样腺癌（EC）。各类型占比分别为32.52%，8.25%，6.31%，40.77%，9.22%和2.91%。②EC组的年龄为50.0（S=7.3）岁，大于NE组的年龄42.0（S=13.0）岁，差异有统计学意义（P

节点刚度与单层网壳结构的刚度与稳定性关系密切。采用了可以真实模拟相贯节点单层柱面网壳的多尺度计算模型,在节点域内采用精度较高的壳单元,在节点域外采用梁单元,节点域与杆端在连接面形心处位移与转角保持连续。该计算模型可以较为准确地反映相贯节点的力学性能,计算精度高、单元数量少,可同时进行结构整体与节点局部的计算分析。运用该模型全面考察了相贯节点刚度对单层柱面网壳跨中挠度、动力特性与屈曲性能的影响。通过对相贯节点进行补强,能够有效增强节点的刚度,采用梁单元模型即可进行单层网壳结构的计算分析,结构设计简便、结构效能较高。

湿地恢复研究是当今恢复生态学研究的主要内容之一。本文从湿地恢复的概念、特点及退化原因入手,并以生态学原理为基础,分析了湿地恢复的目标、方法、原则、策略、技术、评价及监测等方面内容。除此之外,文章进一步讨论了湿地恢复的具体步骤,最后指出为做好湿地生态恢复工作尚需进一步加强方法学、基础理论、应用技术和示范推广等方面的研究。

生境是生物生活繁衍的场所,由生物与非生物因子构成。近几个世纪以来,物种灭绝的速度加快,最重要的原因是生境被破坏。生境评价,是分析物种种群数量减少和濒危原因的重要手段。因此,在对国内外马鹿生境评价的理论和实践进行分析和研究的基础上,提出了以模糊层次分析法为基础的东北马鹿生境的评价体系。对东北马鹿生境的评价,将为管理部门对东北地区马鹿生境的规划、管理和保护提供科学的决策依据。

文章介绍了一种能够独立传输MIL-STD-1773协议的光收发器。该系统采用全直流耦合,支持突发工作模式,具有接收灵敏度低（≤-20 dBm）,动态范围大（≥10 dB）,传输距离远等特点。文章重点介绍了系统的应用背景、设计方案、工作原理、控制电路设计、输出曲线分析以及测试得到的主要参数。

【目的】探讨旋转恒定磁场(RPMF)治疗激素性股骨头坏死的疗效和病理机理。【方法】制备新西兰兔股骨头坏死动物模型,予旋转恒定磁场(铋铁硼永磁体以8Hz频率旋转、形成其上方20cm直径60cm的半球形磁场、表面强度在0.32～0.60T之间)处理4周和8周(A1、A2组),使用组织切片和X线片以及显微CT观察股骨头内部结构变化,同时监测其血液黏稠度、胆固醇、甘油三酯以及髋关节腔压力等的变化,和相应阳性假处理4周、8周组(B1组\B2组)、空白对照(C组)进行统计学分析和比较。【结果】经旋转恒定磁场(RPMF)处理后,动物模型的股骨头骨小梁形态结构显著改善,尤以显微CT表现明显,髋关节腔压力、血液流变学及血脂检测值改善具有显著统计学意义(PEta2A*B>Eta2B)。【结论】磁场可以针对股骨头坏死主要环节高脂血症、血液黏稠度增加、关节腔压力增高等发挥调节作用,有效治疗激素性股骨头坏死,尤其是早期病变;显微CT在诊断激素性股骨头坏死方面具有灵敏性和直观的优越性。

BACKGROUND: Computer-assisted implant surgery can improve implantation accuracy, but the use of implant template in the posterior tooth area is limited for patients with small opening and small interocclusal distance. Therefore, the digital guide has been improved. OBJECTIVE: To study the effect of modified implant template on the accuracy of assisted implantation in missing second molars. METHODS: From July 2020 to July 2023, 40 patients who received digital guide plate implantation or free hand implantation to repair missing second molars were selected from First Affiliated Hospital of Guangzhou Medical University. According to the coin toss method, patients were randomly divided into a trial group (n=22; modified digital guide assisted implantation) and a control group (n=18; free hand implantation). The data of neck deviation, tip deviation, depth deviation, and angle deviation were compared between groups for preoperative and postoperative cone beam CT overlap analysis. One week after the operation, the patients' satisfaction with the operation was assessed by visual analog scale score. RESULTS AND CONCLUSION: (1) The trial group included 25 implants (12 in the upper jaw and 13 in the lower jaw); the control group included 23 implants (8 in the upper jaw and 15 in the lower jaw). The neck deviation, tip deviation, depth deviation, and angle deviation of the trial group were all smaller than those of the control group (P < 0.05, P < 0.001). There was no significant difference in accuracy between the maxillary and mandibular implant site in the trial group (P > 0.05). (2) There was no significant difference in satisfaction with the operation between the two groups (P > 0.05). (3) The results showed that improving the digital guide plate for assisted implantation for missing second molar can improve surgical accuracy and is suitable for patients with small opening and small interocclusal distance in the posterior tooth area. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science & Technology of Food Industry is the property of Science & Technology of Food Industry Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Uranium Geology is the property of Uranium Geology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Modern Urban Transit is the property of Modern Urban Transit Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Short-term load forecasting is an important prerequisite for market planning and can effectively ensure the safe and stable operation of the power system. In order to solve the problems of strong randomness and large volatility of power load, a short-term power load prediction method based on CEEMDAN-PE-SSA-CNN-BiGRU was proposed. Firstly, for the complex and changeable power load data, CEEMDAN(fully adaptive noise set empirical mode decomposition) was used as a subsequence, PE ( permutation entropy) of the subsequences was calculated, and the subsequences with similar entropy values are reconstructed to obtain a new sequence, which reduces the influence of the non-stationary series of the original data on the prediction accuracy and optimizes the computational cost. Secondly, the characteristics of the recombinant sequence were analyzed, and the multi-scale input was used to extract the data features by using the CNN ( convolutional neural network), which was input to BIGRU ( bidirectional gated recurrent unit network) for training, and SSA (sparrow search algorithm) was used to optimize the hyperparameters. Finally, the normalized new series data was input into the prediction model to obtain the prediction sequence, and the final prediction data was obtained by summarizing all the prediction sequences. Using the model proposed, taking the Spanish electricity load as an example, compared with the single model and the combined model, the experimental results show that the model has a better prediction effect. [ABSTRACT FROM AUTHOR]

Objective: To study the prevalence and association factors of depressive and anxiety disorders in the hypertensive population. Methods: Using the database obtained from the 2013 China Chronic Disease and Risk Factor Surveillance and the 2013-2015 China Mental Health Survey, 4 861 hypertensive residents were used as study subjects. And using the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) as diagnostic criterion for depressive and anxiety disorders, the 12-month prevalence was calculated. Multifactorial lo- gistic regression models were used to explore the association factors of hypertension comorbid depressive and anxie-ty disorders. Results: The 12-month prevalence rates of depressive disorders and anxiety disorders were 4.1% and 5.0% in 4 861 hypertensive residents. Chinese Han [OR(95% CI): 2.00 (1.013.93)], lack of sleep [OR(95% CI): 1.82(1.34-2.48)], having myocardial infarction [OR(95% CI): 2.35 (1.18~4.67)] and stroke in the past year [OR(95% CI): 2. 10(1.19-3.72)], and chronic obstructive pulmonary disease [OR(95% CI): 2. 11(1. 11- 4.05)] were risk factors of hypertension comorbid depressive disorder. Hypertensive people with controlled blood pressure [OR(95% CI): 2. 01 (1.30-3.13)] had a higher risk of co-morbid depressive disorder than those with blood pressure above the normal range on this measurement. Chinese Han [OR (95% CI): 2.51 (1.324.80)], Southwest China [ OR(95% CI): 1. 64(1.022.63)], and lack of sleep [OR(95% CI): 1.45 (1.09-1.93)] were risk factors of hypertension comorbid anxiety disorder. Former but current non-smoking [OR(95% CI): 0.48(0.23 -0.99)] was a protective factor of hypertension comorbid anxiety disorder. Conclusion: The 12-month prevalence of anxiety disorder was higher than that of depressive disorder in this hypertensive population. Both Han and sleep deprived hypertensive people had a higher risk of comorbid depressive and anxiety disorders. [ABSTRACT FROM AUTHOR]

Copyright of Plastics Science & Technology / Suliao Ke-Ji is the property of Plastics Science & Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transportation Science & Technolgy is the property of Transportation Science & Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Modern Food Science & Technology is the property of Editorial Office of Modern Food Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Wuhan University of Science & Technology is the property of Wuhan University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Soil & Water Conservation (1009-2242) is the property of Institute of Soil & Water Conservation and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Rehabilitation Medicine is the property of China Association of Rehabilitation Medicine, China-Japan Friendship Hospital and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Shanghai Jiao Tong University (1006-2467) is the property of Journal of Shanghai Jiao Tong University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Chongqing University of Technology (Natural Science) is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Graphics is the property of Journal of Graphics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)