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我国承诺在2030年前实现碳达峰，2060年实现碳中和，实现这一目标需要全社会共同努力，建筑业更是要积极转型升级，实现绿色可持续发展。钢结构属于典型的绿色环保节能型结构，符合循环经济和可持续发展的要求，近年来得到了快速发展，2020年钢结构产量达到了8 900万 t。通过对钢结构行业近年来的调研数据进行详细分析，阐述了钢结构行业的发展现状，重点分析了钢结构相关政策、加工区域特点、钢材品种及强度应用、钢结构应用领域、人均生产劳动率、行业集中度等，指出了双碳目标下我国钢结构行业的发展趋势及路径，对钢结构行业发展有重要指导作用。

针对城市配电网大量使用电缆引起谐波谐振导致变电站内10 kV母线电压互感器高压侧熔断器频繁熔断的问题，提出一种基于模态分析的电动汽车充电站并网谐振分析模型。首先，基于PWM整流器双闭环控制方法建立了单台充电机输入阻抗模型，基于线路分布式参数模型建立了电缆电路的等效阻抗模型。然后，建立了含多台充电机的电动汽车充电站并网模型，并结合节点参与因子和元件灵敏度指标给出了电动汽车充电站并网谐波谐振分析流程。最后，以实际的局部配电网为算例，结果表明本文所提方法能够快速解析电动汽车充电站并网的谐波谐振情况，通过计算元件归一化灵敏度值验证了电缆对地电容和充电机直流输出电压对谐振具有较高参与度，规划人员在规划设计时应重点考虑上述因素。

【目的】探讨阿托伐他汀能否通过抑制AVP的分泌而延缓心肌纤维化，为改善心肌梗死后心室重塑提供新思路。【方法】通过结扎大鼠冠状动脉前降支建立大鼠心肌梗死模型。建模成功后将大鼠分为假手术组（sham组）、心肌梗死大鼠安慰剂治疗组（MI组）及心肌梗死大鼠阿托伐他汀治疗组（A组），每组各有10只大鼠。干预5周后，超声心动图检测大鼠心功能；处死大鼠后，收集心肌组织标本，计算左心室质量指数；ELISA法检测左心室非梗死区和血清的血管加压素（AVP）含量；Masson染色检测心肌间质纤维化水平；免疫组织化学染色检测左心室非梗死区Ⅰ型胶原的表达；Western blot测定左心室非梗死区转化生长因子-β1（TGF-β1）蛋白的表达。【结果】干预5周后，Sham组、MI组和A组分别存活10只、9只和10只大鼠。与Sham组大鼠比较，MI组和A组大鼠的左室质量（LVM）和左室质量指数（LVMI）增加、左室射血分数（LVEF）降低、心肌间质纤维化明显加重、左心室非梗死区Ⅰ型胶原蛋白的表达、AVP含量以及TGF-β1蛋白表达水平明显升高（P

【目的】 探讨320排动态容积CT血管造影对评估糖尿病眼动脉硬化的临床价值?【方法】对30例非糖尿病患者和22例糖尿病患者进行320排动态容积CT血管造影检查,对所有扫描原始数据行最大密度投影(MIP)?容积再现(VR)?多平面重建(MRP)及曲面重建(CPR),观察眼动脉的管腔情况?【结果】 320排动态容积CT血管造影检查可以清晰显示眼动脉形态?走行,以及病变的部位?情况?22例糖尿病患者血管呈不同程度粥样硬化表现?其中颅内段轻度狭窄6侧,中度狭窄4侧;视神经管内段轻度狭窄2侧,中度狭窄4侧;眶内段轻度6侧,中度狭窄2侧?斑块性质以钙化斑块或混合斑块为主?【结论】 320排动态容积CT血管造影可以对糖尿病眼动脉硬化进行无创?准确?快捷的评估,具有重要的临床价值?

本文根据CCITT建议提出了STM—4帧定位方案的常规设计方法,分析了采用容错技术后改进了的帧定位方案。同时,采用1比特容错还是2比特容错;在帧同步态和失步态可否采用不同长度的帧定位码;以及帧定位码的码型等,也作了具体分析。最后提出了一种STM—4帧定位的优选方案,在不过于增加物理实现难度的前提下,其各项指标均优于CCITT建议。

根据钢框架强柱弱梁的抗震设计原则,按照有效控制梁上塑性铰位置的思路,采用在梁腹板进行开孔削弱的节点形式促成塑性铰的形成,进行了反复荷载历程下的五组试件破坏试验,测试了构件相关的力学性能,探讨了梁柱节点的滞回性能及其极限承载力。结果表明,采用腹板开孔的构造形式,可以控制节点处的塑性铰形成位置,降低了连接焊缝发生脆性破坏的可能性,较大程度地改善了节点抗震性能。

东北虎难产助产刘胜瑞，李庆国，李志庚，刘玉文魏宏义，张丽华（辽宁省锦州畜牧兽医学校）（锦州市北湖公园）东北虎难产病例较为罕见。虎是凶猛野兽，难于接近，一旦发生难产，助产比较困难。１９９１年９月７日我们对锦州市北湖公园一例东北虎难产进行了助产，取得了满...

古木参天,人迹罕至的壶瓶山国家级自然保护区林海深处,不仅是国家一级保护动物华南虎的乐园,也是国家二级保护动物猕猴的王国.自古以来,壶瓶山就是猕猴的栖息地,这里流传着许多猴子的传奇故事.如猴子抢亲,说的是一农家女路遇猴群,被猴子抬进山洞,两年后抱回了一个半边猴

1、紫翅椋鸟Sturnus vulgaris Linne’在中国已记录的分布区有新疆、青海、甘肃、西藏、河北、山东、福建（夏候鸟或旅鸟）、广东沿海（迷鸟）。刘宽明同志1985年9月10日在辽宁省大连市营城子采到一号标本,经鉴定属疆北亚种S.v. porphyronotus Sharpe. 采集地生境为开阔的荒地,遍生杂草,成小群（约10余只）正在地面觅食。从地理分布区来看,这群紫翅椋鸟当属迷鸟。 2、赤颈鸫Turdus ruficollis pallas 在国内已记录的分布区有内蒙、青海、甘肃、宁夏、新疆、西藏、四川、云南、湖北、陕西、河北（冬候鸟或旅鸟）。 1986年11月7日秦玉词同志在大连市郊马栏村西头道沟采得一号标本,经鉴定属指

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Objective To investigate the correlation between circulating exosomal miR-485-3p, miR-32- 5p expression, and the incidence of early onset coronary heart disease (CHD). Methods This study retrospectively included 50 patients with a confirmed diagnosis of early onset CHD from October 2023 to May 2024 as the observation group and 50 matched, healthy individuals without CHD as the control group. Demographic and clinical data were collected and compared. Multivariate logistic regression analysis was applied to evaluate the significant predictors of early - onset CHD. Additionally, Spearman correlation analysis was used to assess the relationship between plasma exosomal miR 485-3p, miR-32-5p levels, and CHD occurrence and severity, indicated by the Gensini score. The diagnostic utility of exosomal miR-485-3p and miR-32-5p, individually and combined, was assessed using receiver operating characteristics (ROC) curve analysis. Results The observation group exhibited significantly higher proportions of family history of CHD, smoking history, low density lipoprotein (LDL) levels, miR-485-3p, miR325p, and Gensini scores than the control group (P<0.05). Logistic regression analysis indicated that smoking history, family history of CHD, LDL, miR-485-3p, and miR-32-5p were key risk factors for early onset CHD, the OR values were 6. 997 (95% CI: 1.578-31.027), 16.671 (95% CI: 1.666166.799), 2.632 (95% CI: 1.060-6.537), 12. 717 (95% CI: 2. 629 61.505), 6.000 (95% CI: 1.83919.571). respectively. Positive correlations were found between early onset CHD and elevated levels of circulating exosomal miR-485-3p and miR-32-5p (r=0.525 and 0. 548, respectively; P< 0.05), as well as between the Gensini score and these two exosomal miRNAs (r=0.485 and 0.506, respectively; P < 0.05). The ROC curve analysis yielded the area under ROC curve (AUC) values of 0. 927 and 0. 936 for miR-485-3p and miR-32-5p, respectively, with a combined predictive AUC of 0.957. Conclusion Circulating exosomal miR 485-3p and miR-32-5p are upregulated in early onset CHD, demonstrating positive correlations with both disease incidence and coronary lesion severity. These miRNAs may serve as predictive biomarkers for early onset CHD, with higher diagnostic accuracy when combined. [ABSTRACT FROM AUTHOR]

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In response to the complex and variable water flow patterns in the estuary section, which are not conducive to organizing river dredging construction, taking the New Western Land-sea Corridor Channel (Pinglu Canal) as an example, the HEC-RAS one-dimensional unsteady flow mechanics calculation module is applied to construct a hydrodynamic model for the canal estuary section, and the roughness of the model is calibrated and the accuracy of the model is verified. On this basis, based on the water level and flow characteristics of the Youth Sluice (under the sluice), four flow (water level) conditions are set under the sluice to simulate and analyze the changes in river flow velocity. The results show that the HEC-RAS model has high simulation accuracy and good applicability in tidal river sections; With the increase of cross-sectional flow, the flow velocity response of the section from $26 to $32 near Shijiangdun is rapid, and the flow velocity is about 34.0% higher than other sections. The research results can provide technical support for the construction of dredging projects in the estuary of the canal. [ABSTRACT FROM AUTHOR]

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1986年10月,天津塘沽动物园饲养的一只东北虎（雌性）病死,我们对其进行尸检,从其胆管中发现一种吸虫,经鉴定,认为是后睾科,支睾属中的中华分支睾吸虫Clonorchissinensis（Cobbolb,1875）。本虫于1874年首次在加尔各答一华侨的胆管发现（Mcconnel,1875）,至1908年始在国内证实（Heanley,1908）。1975年在我国湖北省江陵西汉古尸的粪便中发现本虫虫卵,证明本虫在我国至少已有2,100余年的历史（魏德祥,1980）。在对本虫有正式记载的100余年内,中外学者作了大量的研究工作,发现本虫除寄生在人体外,还广泛地在家畜及野生的哺乳类动物中寄生。

Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers 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.)