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机器人未来应是胃肠外科的主流术式

中华胃肠外科杂志 2024年第1期27卷 35-40页

作者：余佩武李政焰陆军军医大学西南医院、全军普通外科中心重庆400038

经过20余年发展, 机器人胃肠手术的临床应用取得了长足进步。越来越多研究表明, 机器人胃肠手术安全可行, 较传统腹腔镜手术操作更精细, 在淋巴结清扫、狭窄空间操作、术中缝合等方面具有技术优势, 临床疗效满意。但是也面临着手术费用... 详细信息

经过20余年发展, 机器人胃肠手术的临床应用取得了长足进步。越来越多研究表明, 机器人胃肠手术安全可行, 较传统腹腔镜手术操作更精细, 在淋巴结清扫、狭窄空间操作、术中缝合等方面具有技术优势, 临床疗效满意。但是也面临着手术费用高, 高级别循证医学证据少, 智能化水平有待提升等问题。随着更多高质量循证医学研究以及新型智能化手术机器人的研发, 机器人胃肠手术将进一步规范化推广, 我们相信, 未来机器人手术一定会成为胃肠外科手术的主流术式。

关键词：机器人手术系统胃肠手术微创手术

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计算机软件测试方法的研究

自动化应用 2024年第2期65卷 199-201页

作者：李正言广西四方汇通人才服务有限责任公司广西南宁530000

计算机软件测试对计算机的正常运行十分重要。从现有的计算机软件测试研究来看,其主要包括逻辑驱动法、集成测试法、黑盒测试法、单元测试法、错误反馈测试方法、回归测试方法等。在不同的环境下,需要采用不同的测试方法。

关键词：计算机软件测试流程分析

1例胰腺肝样腺癌的CT及MR影像学表现及相关文献复习

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中国普外基础与临床杂志 2024年第3期31卷 297-300页

作者：李星谢鑫吕粟李峥艳四川大学华西医院放射科成都610041 四川大学华西医院病理科成都610041

胰腺肝样腺癌是发生于胰腺的罕见肿瘤,恶性程度高,预后差。笔者展示1例胰腺肝样腺癌的CT及MR的影像学表现,并回顾相关文献,简要概述该疾病的潜在病理生理机制、影像学诊断及鉴别诊断,以加深临床及影像科医生对于胰腺肝样腺癌的认识。

关键词：胰腺肝样腺癌影像学表现诊断

The Impact of Irrigation on Bacterial Community Composition and Diversity in liaohe Estuary Wetland

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Journal of Ocean University of China 2018年第4期17卷 855-863页

作者： li Tiantian HU Hong li zhengyan ZHANG Jianye li Dong College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Colleget of Marine life Sciences Ocean University of ChinaQingdao 26610Q China Institute of Wetland Science Panjin 124000China

In this study, the sequencing of 16S ribosomal DNA was used to characterize the soil bacterial community composition and diversity in liaohe estuarine wetland. Soil samples were taken from different locations in the wetland dominated by reed. Moreover, the soil quality parameters were evaluated(p H, moisture, organic matter, total nitrogen, available nitrogen, total phosphorus, available phosphorus). The results showed that the organic matter and nutrient contents were significantly higher in irrigated wetland than those in natural wetland. Major phylogenic groups of bacteria in soil samples including Proteobacteria, Acidobacteria, Gemmatimonadetes, Actinobacteria and Cyanobacteria were analyzed and we found that Proteobacteria was the most abundant in the community, and the phylum Acidobacteria was more abundant in irrigated wetland. Beta diversity analyses indicated that the soil bacterial community was mainly affected by sampling sites rather than seasons. In general, the bacterial community in natural wetland was not significantly different with that in artificial irrigated wetland. Artificial hydraulic engineering irrigated according to the water requirement rule of reed, increased the production of reeds, changed the way of wetland soil material input, but the diversity of bacterial community kept stable relatively.

关键词： soil bacterial community liaohe estuary wetland 16S rDNA sequencing nutrient

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疏花水柏枝残存居群开花特性及繁育系统

植物科学学报 2024年第3期42卷 296-303页

作者：李薇邱利文王毅敏彭刚志高晗李争艳刘磊三峡植物园管理处湖北宜昌443000 三峡库区珍稀资源植物湖北省重点实验室湖北宜昌443000 宜昌三峡大老岭自然保护区管理局湖北宜昌443000

通过野外调查及人工授粉实验,对三峡大坝下游宜昌点军胭脂坝残存疏花水柏枝(Myricaria laxiflora(Franch.)*** et ***)居群开花特性及繁育系统进行观测和研究。结果显示:(1)疏花水柏枝残存居群花期较长(9月至次年4月),群体盛花期为10-11... 详细信息

通过野外调查及人工授粉实验,对三峡大坝下游宜昌点军胭脂坝残存疏花水柏枝(Myricaria laxiflora(Franch.)*** et ***)居群开花特性及繁育系统进行观测和研究。结果显示:(1)疏花水柏枝残存居群花期较长(9月至次年4月),群体盛花期为10-11月,单花花期2~7 d,单花雌雄蕊在时间和空间上有一定重叠,有利于自花授粉;(2)杂交指数(OCI)为2,花粉胚珠比(P/O)为329,均显示疏花水柏枝为兼性自交(异交)系统;(3)人工控制授粉实验结果表明,疏花水柏枝具有部分自交亲和性,但异交处理的结实率显著高于自交处理。推测该残存居群存在自交成分偏高的现象,保护措施应以减少人为干扰和保护生境为主,并加强对残存居群遗传多样性水平的监测。

关键词：疏花水柏枝开花特性繁育系统

城市桥梁采用大跨径桥台跨越地铁设计方案研究

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广东土木与建筑 2024年第5期31卷 30-34页

作者：李炎方万进李真颜广东省冶金建筑设计研究院有限公司广州510080

为研究改善大跨径桥台跨越地铁结构受力大的情况,以广州市黄埔区某大桥为工程背景,通过对预应力混凝土空心桥台设计方案和新型钢筋混凝土拱形桥台设计方案进行了结构受力计算分析,论证了两种桥台设计方案的安全性及合理性。计算结果表明... 详细信息

为研究改善大跨径桥台跨越地铁结构受力大的情况,以广州市黄埔区某大桥为工程背景,通过对预应力混凝土空心桥台设计方案和新型钢筋混凝土拱形桥台设计方案进行了结构受力计算分析,论证了两种桥台设计方案的安全性及合理性。计算结果表明,两种桥台设计方案都能够较好地满足结构受力要求,其中预应力混凝土空心桥台方案可在施工过程中采用台帽与桩基先铰接后固结的施工工艺来释放一部分桩顶附加弯矩,以达到更好的结构受力效果。相比较而言,新型钢筋混凝土拱形桥台设计方案的施工工艺相对简单,结构耐久性相对较好,后期养护难度相对较小。因此,推荐采用新型钢筋混凝土拱形桥台设计方案。

关键词：地铁大跨径桥台预应力桥台拱形桥台

高重复频率、高功率高次谐波极紫外光源进展及应用

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中国激光 2024年第7期51卷 3-21页

作者：魏子娟高熙泽孟翔宇李政言张庆斌兰鹏飞陆培祥华中科技大学光学与电子信息学院湖北武汉430074 华中科技大学物理学院湖北武汉430074 华中科技大学武汉光电国家研究中心湖北武汉430074 湖北光谷实验室湖北武汉430074

超短超强激光脉冲驱动的高次谐波是一种极紫外到软X射线波段的光源,具有指向性好、时空相干性高、亮度高等优点。高次谐波不但是在阿秒时间尺度上研究电子动力学的基础,而且其各类技术优点也使之成为一种有效的桌面型极紫外相干光源,在... 详细信息

超短超强激光脉冲驱动的高次谐波是一种极紫外到软X射线波段的光源,具有指向性好、时空相干性高、亮度高等优点。高次谐波不但是在阿秒时间尺度上研究电子动力学的基础,而且其各类技术优点也使之成为一种有效的桌面型极紫外相干光源,在集成电路制造在线检测、材料科学、生物医药等领域中具有广泛应用。然而,受限于传统钛蓝宝石固体飞秒激光的平均功率和高次谐波传播过程中的转换效率,目前高次谐波极紫外光源的平均功率亟待提高。介绍了高重复频率、高平均功率高次谐波极紫外光源的产生方式及其应用。首先介绍了光纤、固体、啁啾光学参量放大器等新型高重复频率、高平均功率飞秒激光驱动源在高次谐波产生方面的研究进展,之后讨论了激光高次谐波在弱电离气体介质中的宏观传播效应和相位匹配条件。在此基础上,介绍了高平均功率高次谐波极紫外光源在成像检测方面的应用。

关键词：非线性光学高次谐波极紫外光源飞秒激光器极紫外成像检测

Spatial distribution and deposition history of nonylphenol and bisphenol A in sediments from the Changjiang River(Yangtze River) Estuary and its adjacent East China Sea

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Acta Oceanologica Sinica 2010年第5期29卷 44-51页

作者： BIAN Haiyan li zhengyan liU Ping PAN Jinfen Key Laboratory of Marine Environmental Science and Ecology Ministry of Education Qingdao 266100 China College of Environmental Science and Engineering Ocean University of China Qingdao 266100 China

Nonylphenol（NP） and bisphenol A（BPA） are endocrine disruptors causing harmful effects including feminization and carcinogenesis to various organisms,and consequently,their contamination in natural environment has received wide *** study reports the distribution characteristics of NP and BPA in surface sediments and their deposition history based on a dated sediment core in the Changjiang River（Yangtze River） Estuary and its adjacent East China *** contents of NP and BPA in surface sediments ranged from 1.56-35.8 and 0.72-13.2 ng/g（dry mass）,respectively,with high values recorded in the two mud zones,the Changjiang River Estuarine Mud Zone and the Zhejiang Coastal Mud *** values in the Zhejiang Coastal Mud Zone suggest the possibility of long distance transport of both contaminants through the Changjiang riverine *** contents were not correlated with the distance from the pollution source,indicating other factors including particle deposition rate and sediment grain size obviously affecting the distribution *** was also detected in a sediment core at layers deposited from the year of 1971 to 2001 with contents of up to 20.9 ng/g（dry mass）.The deposition fluxes of NP varied from 0.68 to 17.9 ng/（cm^2 · a） with peaks and valleys reflecting the traces of economic development history in China during the previous three *** was detected at sediment layers deposited from 1973 to 2001 with contents of up to 3.66 ng/*** fluxes of BPA varied from 0.62 to 3.13 ng/（cm^2 · a） showing a similar pattern as *** contents of NP and BPA also indicated potential risks on benthic organisms in the study area.

关键词： nonylphenol bisphenol A endocrine disruptor deposition flux the Changjiang River (Yangtze River) Estuary

Impact of typhoon Lekima(2019)on material transport in Laizhou Bay using Lagrangian coherent structures

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Journal of Oceanology and limnology 2022年第3期40卷 922-933页

作者： Qi LOU zhengyan li Yanwei ZHANG Yilei FENG Xueqing ZHANG College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Science and Numerical Modeling Ministry of Natural Resources(MNR)Qingdao 266061China

Typhoon has an impact on an estuary and coastal ***,the present research lacks the detailed description of material transport processes during typhoon passage,such as the transport channels and barriers in the course of material transport and material accumulation area,***,Lagrangian coherent structures(a method developed for describing the transport structure of fluids in recent years)was introduced to investigate and predict the floating material and debris transport process in the Laizhou Bay,Bohai Sea,during typhoon Lekima in *** show that the Lagrangian coherent structure could well explain the complex flow phenomena in the *** the typhoon,the general direction of floating material transport in the Laizhou Bay was *** was a channel for material transport in the northwest and south of the bay,and there are transportation obstacles in the northeast-southwest direction in the middle of the ***,the typhoon might worsen the water *** results provide references for precise countermeasures to control the formulation of pollution in the Laizhou Bay.

关键词： material transport typhoon Lagrangian coherent structures Laizhou Bay