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钢筋混凝土（RC）桥柱的锈蚀问题直接危及桥梁的安全性和使用寿命，必须同时采取腐蚀防护和加固措施。提出采用双相不锈钢套管加固锈蚀RC桥柱，为研究其轴心受压力学性能，对10根双相不锈钢套管加固锈蚀RC短柱、2根低碳钢套管加固锈蚀RC短柱和4根未加固RC短柱对比试件进行了轴心受压试验，获得了试件的破坏形态和荷载-位移曲线。在此基础上分析了钢筋锈蚀率、钢套管壁厚、钢套管材质和填充混凝土类型（自密实自应力混凝土和自密实混凝土）对试件轴压力学性能的影响规律，并推导了双相不锈钢套管加固锈蚀RC短柱轴心受压承载力计算公式，计算结果与试验结果吻合良好，可为实际工程应用和后续研究提供参考。研究结果表明，加固试件呈现出两种破坏形态：（1） 双相不锈钢套管中上部或中下部局部鼓曲破坏；（2） 双相不锈钢套管中上部局部鼓曲的同时发生局部屈曲失稳破坏；加固柱的荷载-位移曲线、荷载-应变曲线和承载力受双相不锈钢套管壁厚和钢套管材质影响较大，而受钢筋锈蚀率和填充混凝土类型影响很小；双相不锈钢套管可以非常显著地提高锈蚀RC柱的承载力和变形能力，并且承载力随套管壁厚的增大而增加。在其他条件相同的情况下，双相不锈钢套管加固试件比低碳钢套管加固试件的承载力提高幅度更大。

“双碳”目标和能源转型的大背景下，区域综合能源系统内部耦合关系不断丰富，对于碳排放的管理不断严格，考虑互联协同的分布式能源站低碳规划问题亟待解决。为此，首先讨论了互联协同分布式能源站空间性能参数矩阵；然后计及负荷-能源站的管线建设以及环境成本、能源站-能源站的互联管线长度、各个分布式能源站规划容量等关键因素，提出了一种考虑互联协同的分布式能源站低碳多目标选址规划模型；最后，讨论了负荷不确定性对分布式能源站选址规划的影响，并且基于基准负荷确定性场景，在某城市实际算例中验证并讨论了考虑低碳需求前后各个分布式能源站的选址结果对比。

为贯彻落实碳达峰碳中和（简称“双碳”）目标，促进低碳产业发展，国家采取一系列碳减排政策推动能源系统低碳转型。构建了考虑碳减排收益的电-热耦合系统低碳扩展规划模型，同时考虑到系统中具有的大量源-荷不确定性，基于信息间隙决策理论（information gap decision theory，IGDT）构建鲁棒低碳规划模型与机会低碳规划模型。采用IEEE-13节点配网和32节点热网组成的能源系统测试算例对模型进行对比验证，分析了鲁棒模型的风险规避特点以及机会模型的寻求收益特点，验证了IGDT方法在不确定信息并不充足时仍然能够量化不确定性，且能根据规划决策者不同的风险偏好在预期的投资成本范围内求得相应的最优规划结果。同时，对比了碳减排收益对两种低碳规划模型的影响，分析了两种模型的不确定性与碳减排收益的关系。最后，分析了储能配置对低碳规划的影响。算例结果证明了储能配置可有效降低两类规划模型的投资成本，即储能投资对规划决策者的风险偏好选择不敏感。

随着外科技术的不断改进、医学工程学与材料学的发展，复合带瓣血管的根部置换术（Bentall手术）成为了主动脉根部病变的标准术式。作为Bentall手术的替代手段，保留主动脉瓣的根部替换术术后避免了终身抗凝和机械瓣膜的相关并发症，降低了血栓栓塞、出血事件的发生率，其有利的血流动力学和潜在更低的心内膜炎风险，保证了术后持久的主动脉瓣功能，患者的生存质量大大提高。本文综述了保留主动脉瓣的根部替换术的适应症、标准化技术要点及其在不同患者中应用的远期结果。

目的 探讨应用支架样取栓装置对前循环大动脉闭塞所致急性缺血性卒中患者机械取栓治疗的临 床效果。 方法 连续纳入采用支架样取栓装置治疗的前循环急性颅内大动脉近端闭塞患者。分析纳入患 者的临床特征、影像学资料、治疗及术后90 d临床随访结果。以术后90 d改良Rankin量表（modified Rankin Scale，mRS）评分为主要指标评估治疗有效性，以症状性颅内出血率、术后90 d死亡率评估治疗 的安全性。 结果 共纳入30例患者，29例应用Solitaire，1例应用Trevo。平均年龄（65.97±11.67）岁。入院时美国 国立卫生研究院卒中量表(National Institutes of Health Stroke Scale，NIHSS)评分中位数13.50（9.75， 18.00）。包括颈内动脉闭塞9例，大脑中动脉M1段闭塞20例，大脑前动脉A1段闭塞1例。术后90 d随访， 56.7%（17/30）患者预后良好（mRS评分0～2分）。术后发生症状性颅内出血率13.3%（4/30），术后 90 d死亡率20%（6/30）。 结论 支架样取栓装置在前循环大动脉闭塞性急性缺血性卒中取栓治疗中临床效果较好，其有效 性、安全性能够在真实世界中得到体现，是治疗急性颅内大动脉闭塞的有效方法。 Abstract: Objective To investigate the clinical effect of stent-like retrievers for mechanical thrombectomy in ischemic stroke patients due to large vessel occlusion. Methods Patients treated with stent-like retrievers for mechanical thrombectomy caused by proximal arterial occlusion in anterior cerebral circulation were enrolled consecutively. Their clinical features, imaging data, treatments and the results of 90-day follow up were analyzed. The major efficacy measure was assessed with modified Rankin Scale (mRS) at 90 days after onset. The safety measures were assessed with symptomatic intracranial hemorrhage (sICH) and mortality at 90 days. Results Of the 30 enrolled patients, 29 were treated with Solitaire and 1 with Trevo. The mean age was (65.97±11.67) years old, and median baseline National Institutes of Health Stroke Scale (NIHSS) score was 13.50 (9.75, 18.00). Nine of them had internal carotid artery occlusion, 20 had the M1 segment of the middle cerebral artery occlusion and 1 had the A1 segment of the anterior cerebral artery occlusion. The proportion of favorable functional outcome (mRS 0-2 at 90 days) was 56.7% (17/30). sICH rate was 13.3% (4/30), and the mortality at 90 days was 20% (6/30). Conclusion The effect of stent-like retrievers for mechanical thrombectomy in ischemic stroke patients due to anterior cerebral circulation large vessel occlusion is relatively good. Its efficacy and safety can be reflected in the real world, and it is an effective method for the treatment of acute intracranial artery occlusion.

在桁框结构的桁架跨中设置空腹式消能段是一种延性桁框结构。针对该结构体系,首先推导了消能段的极限抗剪承载力,然后提出了桁框结构的简化计算模型,并根据我国抗震设计准则给出了确定消能段长度的计算方法和构造要求。采用此方法确定的消能段可以精确控制延性桁框结构的屈服时刻和破坏模式,并实现水平地震作用下各楼层同步屈服,充分耗能。最后采用有限元方法进行了单向和循环加载分析与验证,结果表明:合理的消能段长度可以显著提高延性桁框结构的延性、耗能能力、承载能力和安全储备,使其抗震性能明显优于普通桁框结构。提供的计算方法具有较高的精度,可以在确保消能段耗能的前提下实现结构的优化设计。

Copyright of Chinese Journal of High Pressure Physics is the property of Chinese Journal of High Pressure Physics 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.)

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To investigate the stress distribution and safety reliability of the baffle exposed to high temperature in heater, the stress of baffle was analyzed based on the finite element method. The dangerous section path was selected for the stress linearization analysis, and the structure of baffle was optimized according to the safety assessment results. The results show that the stress concentration caused by sharp angle has great influence on the stress distribution of baffle, and the excessive film stress of P₁ is the main reason of stress assessment risk. The overall stress of baffle is increased with the increasing of fuel inlet velocity, and the temperature is positively correlated with the thermal stress. The stress change trend is similar at different speeds, and the structure discontinuity at the connection of heat exchange tube bundle and folding plate can cause stress increase. In the optimization scheme, the maximum thermal stress of baffle is reduced by 16.7% when the sharp angle is passivated. The maximum thermal stress with thermal barrier coating is decreased by 44.5% as compared with that for passive tip angle, and decreased by 53.7% as compared with that for the original structure. The overall thermal stress is decreased, and the strength of the optimized baffle plate is assessed as qualified. [ABSTRACT FROM AUTHOR]

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【Objective】To clarify the genetic characteristics and potential functions of the hexokinase family in melon (Cucumis melo). 【Method】The melon HXK gene family was identified at the whole genome level, and its protein's physicochemical properties, subcellular localization, systematic evolution, gene structure, chromosome localization, conserved motifs, protein structure, promoter cis acting elements, etc., were analyzed. Based on transcriptome data, the expression patterns of CmHXK gene in male flowers, female flowers, roots, leaves, fruits, and fruit development processes were analyzed. In addition, the expression patterns of CmHXK gene under abscisic acid, drought, salt, and low temperature stress were measured by RT-qPCR.【Result】A total of six CmHXK gene family members were identified on chromosomes 2, 4, 5 and 8, containing 6-9 exons, 5-8 introns, with an average amino acid number of 462, an average molecular weight of 50.2 kD and an isoelectric point of 4.99-6.34. Systematic evolutionary analysis showed that the melon HXK members had the closest homology with cucumber. The main cis-acting elements in the melon CmHXK promoter were light responsive elements, hormone responsive elements, and stress responsive elements. The expression of CmHXKs was specific in different organs. Among them, CmHXK1, CmHXK2, and CmHXK5 expressed at high level in male flowers, female flowers, roots, leaves, and fruits during the development and maturation of fruits. However, the expressions of CmHXK3, CmHXK4, and CmHXK6 decreased with the development and maturation of fruits. The responses of CmHXKs to the four abiotic (abscisic acid, drought, salt, and cold) stresses differed. Among them, CmHXK1, CmHXK3, and CmHXK4 were strongly induced by ABA. CmHXK1, CmHXK3, and CmHXK6 were strongly induced by salt stress, and CmHXK1, CmHXK2, and CmHXK3 were strongly induced by drought stress. CmHXK1 and CmHXK6 were strongly induced by cold stress.【Conclusion】The CmHXK family are highly conserved and play important roles in the growth, development, and abiotic stress in melon. Among them, CmHXK1 is the most sensitive to four abiotic stresses. [ABSTRACT FROM AUTHOR]

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[Objective The objective of this study was to analyze the spatial distribution characteristics of surface soil moisture content in the rocky desertification slope under different land preparation measures and to provide references for improving water resources utilization efficiency and agricultural management level on rocky desertification slopes. [Methods] The citrus forest under three land preparation measures of reverse slope, flat terrace, and natural slope on rocky desertification slope were chosen as the research objects. Classical statistics, geostatistics and multifractal theory were used to analyze the spatial distribution characteristics of soil moisture content. [Results (1) The soil moisture content of the reverse slope was significantly higher than that of the flat terrace and the natural slope (p<0.05). The spatial continuity, aggregation, total and structural variability of soil moisture content on the flat terrace were stronger than those on the reverse slope and the natural slope. (2) The soil moisture content of different land preparation measures showed moderate variability (10.00%≤CV≤100.00%), strong spatial autocorrelation [C0/(C0+ C)≤0.25], and extremely significant (p<0.01) spatial aggregation. (3) The distribution of soil moisture content under different land preparation measures has multi-fractal characteristics. During the dry season, the distribution range of soil moisture content was narrowest on the reverse slope, and more discrete on the natural slope. During the rainy season, the distribution range of soil moisture content was narrowest on the flat terrace, and more uneven on the reverse slope. [Conclusion] Soil mechanical composition was the main factor that affected soil moisture content, and the reverse slope was more conducive to improved soil moisture conditions on rocky desertification slopes. [ABSTRACT FROM AUTHOR]

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