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非英专学生高频易误程式语的产出调查

河北联合大学学报（社会科学版） 2014年第1期14卷 188-190页

作者：吕靖李良博华南农业大学外国语学院广东广州510642 广东外语外贸大学词典学研究中心广东广州510420

学习者二语的地道性和流畅性很大程度上依赖于其对程式语的掌握。以中国英语学习者语料库为观察库以BNC为参照库,通过与BNC程式语词表的比对分析了中国非英语专业学生程式语的部分产出特点,以期为大学英语教学提供一定的借鉴。

关键词：程式语中国英语学习者语料库 BNC

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元宝槭树叶中的黄酮苷

云南植物研究 2005年第3期27卷 232-234页

作者：谢百波许福泉李良波陈昌祥中国科学院昆明植物研究所植物化学与西部植物资源持续利用国家重点实验室

从槭树科植物元宝槭(AcertruncatumBunge)树叶中分离得到6个黄酮苷化合物。通过波谱分析鉴定其结构分别为:kaempferol-3-O-α-L-rhamnopyranoside(1);quercetin-3-O-β-D-galactopyranoside(2);quercetin-3-O-α-L-rhamnopyranoside(3);... 详细信息

关键词：元宝槭黄酮苷

Pulsed dynamic electrolysis enhanced PEMWE hydrogen production:Revealing the effects of pulsed electric fields on protons mass transport and hydrogen bubble escape

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Journal of Energy Chemistry 2025年第1期100卷 201-214页

作者： Xuewei Zhang Wei Zhou Yuming Huang liang Xie Tonghui li Huimin Kang lijie Wang Yang Yu Yani Ding Junfeng li Jiaxiang Chen Miaoting Sun Shuo Cheng Xiaoxiao Meng Jihui Gao Guangbo Zhao School of Energy Science and Engineering Harbin Institute of Technology China Datang Technology Innovation Co. Ltd

The transition of hydrogen sourcing from carbon-intensive to water-based methodologies is underway,with renewable energy-powered proton exchange membrane water electrolysis （PEMWE） emerging as the preeminent pathway for hydrogen *** remarkable advancements in this field,confronting the sluggish electrochemical kinetics and inherent high-energy consumption arising from deteriorated mass transport within PEMWE systems remains a formidable *** impediment stems primarily from the hindered protons mass transfer and the untimely hydrogen bubbles *** address these challenges,we harness the inherent variability of electrical energy and introduce an innovative pulsed dynamic water electrolysis *** to constant voltage electrolysis (hydrogen production rate:51.6 m L h-1,energy consumption:5.37 kWh Nm-3H2),this strategy (hydrogen production rate:66 m L h-1,energy consumption:3.83 kWh Nm-3H2) increases the hydrogen production rate by approximately 27%and reduces the energy consumption by about 28%.Furthermore,we demonstrate the practicality of this system by integrating it with an off-grid photovoltaic （PV） system designed for outdoor operation,successfully driving a hydrogen production current of up to 500 mA under an average voltage of approximately 2 *** combined results of in-situ characterization and finite element analysis reveal the performance enhancement mechanism:pulsed dynamic electrolysis （PDE） dramatically accelerates the enrichment of protons at the electrode/solution interface and facilitates the release of bubbles on the electrode *** such,PDE-enhanced PEMWE represents a synergistic advancement,concurrently enhancing both the hydrogen generation reaction and associated transport *** promising technology not only redefines the landscape of electrolysis-based hydrogen production but also holds immense potential for broadening its application across a diverse spectrum of electrocatalytic endeavors.

关键词： Electrolysis

对称双芯移相变压器有载分接开关最大级电压计算方法研究

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中国电机工程学报 2017年第7期37卷 2110-2119页

作者：高飞刘欣王利桐李博赵晓春梁贵书李金忠郭锐遇心如中国电力科学研究院北京市海淀区100192 华北电力大学电力工程系河北省保定市071003 安徽电力调度控制中心安徽省合肥市230022

移相变压器可实现电网潮流的灵活控制,其负荷情况复杂多变且负载电流的大小与负载侧电压的相位差变化较大,有载分接开关作为移向变压器相位调节的关键组件,其档位调节过程中所需开断的级电压大小与负载条件密切相关。该文基于对称双芯... 详细信息

移相变压器可实现电网潮流的灵活控制,其负荷情况复杂多变且负载电流的大小与负载侧电压的相位差变化较大,有载分接开关作为移向变压器相位调节的关键组件,其档位调节过程中所需开断的级电压大小与负载条件密切相关。该文基于对称双芯移相变压器的工作原理及运行特性,结合负载条件下有载分接开关级电压的计算公式,分析了包括负载电流的大小、负载电压与负载电流的相位差以及移相变压器做超前与滞后调节在内的不同负荷条件对级电压大小的影响,得出了励磁变压器二次侧电压的变化规律,提出最大级电压的计算方法。通过实例计算与Matlab/SIMUliNK仿真结果的对比,验证了所提最大级电压计算方法的可行性和准确性。

关键词：双芯移相变压器有载分接开关最大级电压负载条件等效模型运行特性

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地下水在施工过程中的有效利用

浙江建筑 2016年第10期33卷 55-57,64页

作者：金泽钟波李亮浙江省三建建设集团有限公司浙江杭州310002

以浙江省三建建设集团有限公司景芳三堡项目对地下水的利用为例,介绍了要求基坑降水的工程在降水阶段对地下水的有效利用方法。即通过建立大型蓄水池和泵房,在降水过程中将地下水集中收集至蓄水池,再利用水泵将收集的地下水输送到现场... 详细信息

以浙江省三建建设集团有限公司景芳三堡项目对地下水的利用为例,介绍了要求基坑降水的工程在降水阶段对地下水的有效利用方法。即通过建立大型蓄水池和泵房,在降水过程中将地下水集中收集至蓄水池,再利用水泵将收集的地下水输送到现场各用水点。使施工现场进出车辆冲洗、塔吊喷淋系统、围墙喷淋系统、结构施工过程中模板冲洗、混凝土养护用水、项目绿化浇灌等尽可能采用地下水。如此不仅符合浙江省委十三届四次全会关于"五水共治"要求,做到节约用水,而且有助于项目的成本降低。对类似工程的水资源节约具有一定的借鉴作用。

关键词：节约用水地下水有效利用

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基于近场校正的相控阵天线低副瓣方向图综合

微波学报 2018年第4期34卷 6-9页

作者：陈腾博李海良倪子楠北京空间飞行器总体设计部

相控阵天线单元存在着幅度和相位误差,这些误差的综合作用会导致天线方向图副瓣电平达不到优化设计结果。提出了一种基于近场幅相校正的相控阵天线低副瓣综合方法,首先采用近场单通道测量方法,得到相控阵天线阵面的实测幅相值;然后采用... 详细信息

相控阵天线单元存在着幅度和相位误差,这些误差的综合作用会导致天线方向图副瓣电平达不到优化设计结果。提出了一种基于近场幅相校正的相控阵天线低副瓣综合方法,首先采用近场单通道测量方法,得到相控阵天线阵面的实测幅相值;然后采用非线性二乘法对天线单元幅度和相位进行优化综合;最后根据优化幅相值对实测幅相值进行修正,获得相控阵天线阵面幅相配置参数。方向图实测结果表明该方法可行、有效。

关键词：近场校正相控阵天线低副瓣

Moment Redistribution Effect of the Continuous Glass Fiber Reinforced Polymer-Concrete Composite Slabs Based on Static Loading Experiment

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Structural Durability & Health Monitoring 2025年第1期19卷 105-123页

作者： Zhao-Jun Zhang Wen-Wei Wang Jing-Shui Zhen bo-Cheng li De-Cheng Cai Yang-Yang Du Hui Huang Offshore Oil Engineering Co.Ltd. Tianjin300461China Department of Bridge Engineering School of TransportationSoutheast UniversityNanjing211189China

This study aimed to investigate the moment redistribution in continuous glass fiber reinforced polymer(GFRP)-concrete composite slabs caused by concrete cracking and steel bar yielding in the negative bending moment *** experimental bending moment redistribution test was conducted on continuous GFRP-concrete composite slabs,and a calculation method based on the conjugate beam method was *** composite slabs were formed by combining GFRP profiles with a concrete layer and supported on steel beams to create two-span continuous composite slab *** methods,epoxy resin bonding,and stud connection,were used to connect the composite slabs with the steel *** experimental findings showed that the specimen connected with epoxy resin exhibited two moments redistribution phenomena during the loading process:concrete cracking and steel bar yielding at the internal *** contrast,the composite slab connected with steel beams by studs exhibited only one-moment redistribution phenomenon throughout the loading *** the concrete at the internal support cracked,the bending moment decreased in the internal support section and increased in the midspan *** the steel bars yielded,the bending moment further decreased in the internal support section and increased in the mid-span *** GFRP profiles do not experience cracking,there was no significant decrease in the bending moment of the mid-span *** test specimens experienced compressive failure of concrete at the mid-span *** results showed good agreement between the calculated and experimental values of bending moments in the mid-span section and internal support *** proposed model can effectively predict the moment redistribution behavior of continuous GFRP-concrete composite slabs.

关键词： Moment redistribution GFRP-concrete composite slabs bending moment experimental study analysis model

Human-induced pluripotent stem cell-derived neural stem cell exosomes improve blood-brain barrier function after intracerebral hemorrhage by activating astrocytes via PI3K/AKT/MCP-1 axis

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Neural Regeneration Research 2025年第2期20卷 518-532页

作者： Conglin Wang Fangyuan Cheng Zhaoli Han bo Yan Pan liao Zhenyu Yin Xintong Ge Dai li Rongrong Zhong Qiang liu Fanglian Chen Ping Lei Department of Geriatrics Tianjin Medical University General HospitalTianjinChina School of Medicine Nankai UniversityTianjinChina Tianjin Neurological Institute TianjinChina

Cerebral edema caused by blood-brain barrier injury after intracerebral hemorrhage is an important factor leading to poor ***-induced pluripotent stem cell-derived neural stem cell exosomes(hiPSC-NSC-Exos)have shown potential for brain injury repair in central nervous system *** this study,we explored the impact of hiPSC-NSC-Exos on blood-brain barrier preservation and the underlying *** results indicated that intranasal delivery of hiPSC-NSC-Exos mitigated neurological deficits,enhanced blood-brain barrier integrity,and reduced leukocyte infiltration in a mouse model of intracerebral ***,hiPSC-NSC-Exos decreased immune cell infiltration,activated astrocytes,and decreased the secretion of inflammatory cytokines like monocyte chemoattractant protein-1,macrophage inflammatory protein-1α,and tumor necrosis factor-αpost-intracerebral hemorrhage,thereby improving the inflammatory *** sequencing indicated that hiPSC-NSC-Exo activated the PI3K/AKT signaling pathway in astrocytes and decreased monocyte chemoattractant protein-1 secretion,thereby improving blood-brain barrier *** with the PI3K/AKT inhibitor LY294002 or the monocyte chemoattractant protein-1 neutralizing agent C1142 abolished these *** summary,our findings suggest that hiPSC-NSC-Exos maintains blood-brain barrier integrity,in part by downregulating monocyte chemoattractant protein-1 secretion through activation of the PI3K/AKT signaling pathway in astrocytes.

关键词： AKT astrocyte blood-brain barrier cerebral edema exosomes human-induced pluripotent stem cells intracerebral hemorrhage neural stem cells neuroinflammation PI3K

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糖尿病肾病患者血液透析的护理体会

糖尿病新世界 2018年第22期21卷 177-178页

作者：李晓南李波良四川省南充市中心医院肾内科四川南充637000

目的分析糖尿病肾病者临床血液透析护理体会,为后期护理工作提供参考。方法回顾性分析2016年1月—2017年4月期间医院收治的35例糖尿病肾病(DN)者,行血液透析治疗期间护理情况,所有患者根据其具体病情给予相应护理,统计护理期间患者并发... 详细信息

目的分析糖尿病肾病者临床血液透析护理体会,为后期护理工作提供参考。方法回顾性分析2016年1月—2017年4月期间医院收治的35例糖尿病肾病(DN)者,行血液透析治疗期间护理情况,所有患者根据其具体病情给予相应护理,统计护理期间患者并发症发生情况,比较护理前后患者焦虑、抑郁评分差异。结果并发症发生率为2.9%;护理后焦虑自评表(SAS)、抑郁自评表(SDS)评分低于入院时(t_1=41.673;t_2=33.110,P<0.05)。结论对DN者血液透析期间有效护理,临床并发症少,患者心理状态良好,能良好配合临床治疗。

关键词：血液透析护理糖尿病肾病并发症