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提出了一种用于钢板-混凝土组合梁的新型带孔开槽板咬合式剪力连接件，以解决钢-混组合结构因界面滑移造成的组合度下降问题。为揭示该新型咬合式连接件组合梁的受力机理，开展了一系列抗弯和抗剪试验研究，以剪跨比、含钢率、混凝土类型、板式连接件厚度及间距为主要参数，分析不同参数对组合梁破坏模式、承载能力和变形延性等方面的影响。研究发现：咬合式连接件能有效提高组合梁的组合度，减小界面滑移，充分发挥钢板-混凝土共同工作效应；所有试件在破坏前均表现出良好的延性；因芯材混凝土材性差异，以超高性能混凝土（UHPC）作为芯材的抗剪试验梁与以普通混凝土作为芯材的抗剪试验梁相比，极限承载力提高了1倍以上，变形延性提升了近5倍。基于破坏机理提出了咬合式连接件组合梁的抗弯承载力及抗剪承载力理论模型，通过与试验结果对比证实了所提出的模型能很好地预测组合梁的极限承载能力。

目的大脑淋巴瘤病（LC）是中枢神经系统淋巴瘤（PCNSL）的特殊类型，目前报道较少，预后较其它类型的PCNSL差，早期诊断对判断预后十分重要。本文报道经脑立体定向活检明确病理的大脑淋巴瘤病3例，以提高临床医师对大脑淋巴瘤病的认识。方法回顾性分析2017年1月-2020年7月间，中山大学附属第三医院岭南医院确诊为大脑淋巴瘤病3例患者的临床表现、影像学、神经病理特征。结果3例患者分别为44、61和64岁男性，出现进展性认知下降、视物模糊、下肢乏力等神经功能障碍表现，脑部核磁共振（MRI）发现双侧大脑弥漫性脑白质病变，表现为长T1长T2信号影，T2液体衰减反转恢复序列（T2-FLAIR）呈高信号，弥散加权序列（DWI）不均匀稍高，增强扫描强化不明显，经立体定向穿刺脑组织活检取材，镜下可见弥漫性B细胞浸润，CD20（+），结合影像学特征，均确诊为B细胞来源的大脑淋巴瘤病。结论大脑淋巴瘤病为中枢神经系统淋巴瘤的特殊类型，影像诊断困难，极易误诊，对于双侧大脑半球弥漫性病变、同时累及深部脑白质和灰质结构、无强化或小斑片状强化为影像学表现的患者，注意与此病相鉴别，尽早病灶活检，明确病理诊断，对患者的早期诊断及预后具有重要意义。

电网近年来的高速发展需要内外兼备的灵活性以保障其经济可靠的运行。世界各地智能电网的迅猛发展让电网和其他系统之间的关系越来越紧密。电网和其他系统正逐渐融合成为一个能源有机体。这给能源领域带来了根本性的挑战，同时也为电网消除传统的严格边界条件进而提升其灵活性提供了难得的机遇。从能源有机体的各个层面探讨了提高电网灵活性的可能性。电网存在着巨大的灵活性潜力，但是挖掘这些潜力需要高性能的分析方法和工具以实现电网的整体设计和能源有机体的全方位评估，并适应系统规模的逐渐扩大和复杂度的不断提高。介绍了几个开源软件平台和软件包作为灵活性电网高性能分析的样例。它们已被应用于能源有机体的大规模分析、优化和控制。提出的“电网沙盘”（GridSandbox）概念可作为一个开放式的环境，用于评估各类高性能分析方法和工具的有效性。建设灵活性电网所需的高性能分析方法和工具的开发需要来自数学、计算、数据科学、电网以及其他能源领域等多个学科专家的通力合作。高性能分析研究领域仍有许多空白亟需填补，具备广阔的研究和应用前景。

： 【目的】评价GRACE评分对急诊科急性胸痛患者30 d心血管不良事件（MACE）的预测价值。【方法】 使用前瞻性观察研究的方法纳入 2016 年1月1日至 2016 年4月1日在我院急诊科首诊急性胸痛的患者，记录患 者临床基本资料，完成GRACE评分的计算 ，并对入组的患者进行30 d MACE的随访。【结果】入选209例患者，男 性110例（52.63%），女性99例（47.37%），年龄范围20~98岁，平均年龄（65.28±16.85）岁。发生MACE 12例，其中 急诊死亡2例，住院期间死亡3例，出院后死亡6例，再发心肌梗死1例。与非MACE组相比，MACE组患者年龄， BMI，住院人数，CCU 住院例数、GRACE 评分均高于非 MACE 组患者，两组比较具有统计学差异（P＜0.05）； GRACE评分预测急性胸痛30 d MACE的ROC曲线下面积（95% CI）为0.819（0.735 -0.902），最佳敏感性为0.92， 特异性为0.65。不同GRACE评分危险分层中对30 d心血管不良事件概率分别为0.95%（低危）、6.67%（中危）、 18.92%（高危）。【结论】GRACE评分对急性胸痛患者30 d心血管不良事件具有良好的预测价值

In order to explore the mitochondrial genome gene structure of Bactrocera( Zeugodacus) scutellaris,based on the measured mitochondrial whole genome of B. (Z. )scutellaris,the values of ATskew =(A-T) / (A+T)and GC skew =(G-C) / (G + C)of 13 protein-coding genes(PCGs)and 22 trnA genes in the whole mitochondrial genome were measured by DNAMAN V6 software. Win32 CodonW software was used to analyze the number of protein gene codons and the frequency of synonymous relative codon RSCU values. MITOS WebServer and trnAscan-SE 2. 0 software were used to analyze the secondary structure of trnA,providing evidence for species diagnosis,phylogeny and evolutionary biology. [ABSTRACT FROM AUTHOR]

In the forthcoming era of power grids emphasizing clean energy and green transportation, stringent safety and reliability standards are imperative. This study addresses the limitations of traditional reinforcement learning in managing the control performance degradation due to the extensive integration of new energy sources in microgrid by proposing a multi-step self-correcting Q-learning algorithm. This algorithm features a self-correcting estimator for accurate system state estimation and an eligibility trace mechanism to expedite convergence, facilitating rapid controller responses to system fluctuations and minimizing the impact of frequency regulation delays. The simulation section of this paper presents an enhanced two-area load frequency control model, integrating wind power and electric vehicle modules, and subjected to various disturbances to mimic real-world power system load changes. The results demonstrate that the proposed algorithm excels in control performance metrics when com- pared to existing methods. [ABSTRACT FROM AUTHOR]

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Shaoyang being in charge of bone theory is originally from the Huangdi Neijing. After the continuous deepening and improvement of many generations of doctors in the past, it has now become a comprehensive theoretical system of traditional Chinese medicine for orthopedic diseases. Osteoporosis is a systemic chronic bone metabolic disease. Its main form is the loss of bone mass in the whole body and the destruction of bone microstructure. This characteristic corresponds to flaccidity of bones, bone bi-disease, and other traditional Chinese bone diseases. However, modern doctors rarely treat such diseases from the perspective of Shaoyang. In this paper, the essence of Shaoyang being in charge of bone and the connection between Shaoyang and OP are clearly sorted out. The method of treating OP from the perspective of Shaoyang is discussed. This has practical significance of the theory of Shaoyang being in charge of bone and has extremely great value for guiding the TCM prevention and treatment program of OP patients. [ABSTRACT FROM AUTHOR]

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The key to empowering the revitalization of rural ecological culture lied in the dual integration of industry-education and science-education to drive rural agricultural vocational education to cultivate innovative talents of ecological culture. This paper took the agricultural vocational education of Zaozhuang Vocational College in Shandong as an example,based on the lack of appropriateness of the integration of production-education, the lack of new driving force driven by the integration of science-education, and the lack of a multi-collaborative education community, this paper had constructed an innovative education mode that integration of production and education, cultivation of ecological talents, scientific and technological innovation, development of green agriculture, cultural embedding and promotion of multi-coordination. In order to create a regional practice strategy: the integration of production and education, promote the revitalization of ecological culture; integration of science and education, innovation of agricultural education mode; cultural leadership, collaborative empowerment multi-productive fusion. [ABSTRACT FROM AUTHOR]

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The morphological characteristics, distribution and damage of plants, flowers, fruits and seeds of Solanum khasianum were studied. The similar species of the same genus, such as Solanum carolinense L., Solanum rostratum Dunal., Solanum torvum Swartz and Solanum sisymbriifolium Lam. were also studied. The study provided information basis for rapid and accurate identification of important weeds of Solanum, improve the epidemic detection rate and strengthen the risk management of important weeds under quarantine. [ABSTRACT FROM AUTHOR]

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【Objective】Based on the evaluation of growth period and grain yield performance of ratooning rice under different cutting heights, suitable varieties were selected for ratooning rice production in North Guangdong.【Method】 Thirty-four rice varieties (bred or approved in Guangdong Province) were selected for tests under mid- or low-stubble cutting heights. The growth period, grain yield and yield components under different cutting heights among the tested varieties were investigated.【Result】The main crop yield was 5 210.9-8 566.8 kg/hm2, and grain yield of Huangguanghuazhan 1 was the highest. The ratoon crop yield of low-stubble ratooning rice was 3 335.0-6 357.3 kg/hm², 16.1% higher than that of midstubble ratooning rice (2 084.4-5 940.5 kg/hm2). Qingxiangyou 19 Xiang was the highest in ratoon crop yield under both cutting heights. According to cluster analysis, the ratoon crop yield and total annual grain yield under mid-stubble ratooning rice mode could be categorized to four major groups, namely, high-yield, mid-high-yield, medium-yield, and low-yield levels. Each group contained 4, 7, 18, and 5 varieties for ratoon crop yield and contained 1, 14, 14, and 5 varieties for total annual grain yield under mid-stubble ratooning rice mode. Under low-stubble cutting height, the ratoon crop yield was also categorized to four major groups with 2, 17, 14 and 5 varieties, while the total annual grain yield was divided into three major groups, containing 10, 21, and 3 varieties, respectively. In ratoon season of low-stubble ratooning rice, the growth period was prolonged by an average of 9.1 days, the number of spikelets per panicle was increased, and the effective panicles and seed setting rate were reduced compared with those in ratoon season of mid-stubble ratooning rice. Under mid-stubble cutting height, the ratooning rice regenerated from the 3rd, 4th, and 5th nodes from the top (D3, D4 and D5) contributed 4.7%, 33.3%, and 62.0% of the total grain yield per plant, respectively. Under low-stubble cutting height, the ratooning rice regenerated from D3, D4, and D5 contributed 0%, 11.9%, and 88.1% of the total yield per plant.【Conclusion】If assessed with the criteria of highor mid-high-level ratoon crop yield and high-level total annual grain yield, 9 rice varieties, including Huangguangyouzhan, Huangguanghuazhan 1, Huangguangtaizhan, Wuyouyuehesimiao, Guang 8 Youjinzhan, Hengfengyou 387, Qingxiangyou 003, Qingxiangyou 132, and Qingxiangyou 19 Xiang are recommended for production of mid-stubble ratooning rice. Ten rice varieties, including Erguangyouzhan 3, Huangguangyouzhan, Huangguanghuazhan 1, Huangguangtaizhan, Yuehesimiao, Nanjingzhan, Yuetaiyouzhan, Wuyouyuehesimiao and Guang8youjinzhan are suitable for production of low-stubble ratooning rice. For mid-stubble ratooning rice, new tillers mainly regenerate from the 4th nodes from the top and other lower nodes below. For low-stubble ratooning rice, new tillers mainly regenerate from the 5th nodes and other lower nodes below. [ABSTRACT FROM AUTHOR]

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Objective Based on the theory of "Brain as Marrow Sea", this paper analyzes the relationship between Alzheimer's disease (AD) and osteoporosis (OP), and explores the common pathogenesis of the two diseases, so as to spread the idea of prevention and treatment of OP. Methods The association between OP and AD was explored by searching CNKI, Wanfang, Pubmed and other databases on the theory of " Brain as Marrow Sea" and the ancient Chinese medical literature, clinical and experimental studies on OP and AD. Results The brain is the sea of marrow is from the Huangdi Neijing. The doctors' knowledge of the brain and the Sea of marrow is constantly deepening. They realize that the sea of marrow is full of nourishment for the bones, strong muscles and bones, intelligent and quick-witted, the bone and brain systems depend on each other physiologically through the marrow. OP and AD share the same physiological and pathological basis. Conclusion The theory of "Brain as Marrow Sea" is of great value in guiding the understanding of the common pathogenesis of AD and OP. Most doctors take the liver, kidney, spleen, muscle, bone and muscle as their guidance in the prevention and treatment of OP, we neglect the important role of brain-marrow, and expect to find out more ways to prevent and treat OP based on this theory. [ABSTRACT FROM AUTHOR]

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