考虑谐波谐振和电压稳定的海上风电场无功优化配置方法 [PDF]
全球能源互联网, 2023 海上风电经长距离高压交流海底电缆接入电网，海底电缆容升效应显著，容易引起工频过电压，同时电力电子器件和线路电容引起的谐波谐振问题也严重影响着电网电能质量，因此进行海上风电场无功配置时应充分考虑过电压和谐波谐振问题。针对上述问题，建立了海上风电场谐波模型，对海上风电场的谐波模态阻抗进行扫描，继而分析海上风电场的谐振特性；然后研究了海上风电场无功特性，计算各种发电出力水平和并网点电压下的风电场无功缺额；接着以降低综合成本为目标，以静态电压稳定裕度、最小补偿容量、谐波谐振及过电压为约束 ...
杜婉琳*, 梅桂华, 马明, 王玲
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Separation, Purification, Structure-Activity Relationship and Molecular Docking of Sesame Angiotension Converting Enzyme Inhibitory Peptides Prepared by Subcritical Water Hydrolysis [PDF]
, 2023 Angiotension converting enzyme (ACE) inhibitory peptides from high-temperature sesame meal protein hydrolyzed by subcritical water were separated and purified by sequential nanofiltration, ultrafiltration and liquid chromatography, and their structures ...
SUN Qiang, WANG Ruidan, HUANG Jinian, LU Xin, SONG Guohui, YOU Jing
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Research Progress on the Effect of New Electrophysical Processing on Multiscale Protein Structure [PDF]
, 2023 Protein is an important nutrient required by the human body. The change of protein structure during processing will lead to changes in its functional properties, in turn affecting the quality of foods.
CONG Haihua, CUI Baowei, ZHANG Ziwei, ZHOU Qian, SONG Jingcheng, GAO Yue, LU Xiaoyan, LI Moke
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Differentiated Study of Constituents between Organic Milk and Ordinary Milk by Stable Isotope Ratio and UPLC-Q-Orbitrap [PDF]
, 2023 Objective: To prevent some illegal companies driven by interests from arbitrarily labeling "organic" to deceive consumers using ways such as counterfeiting, forgery, and shoddy food.
Bozhou XU, Xiuli XU, Xuemei NIE, Yun XIE
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Developmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019 目的 本国际临床指南由欧洲残疾儿童学会（the European Academy of Childhood Disability，EACD）牵头制定，旨在解决发育性协调障碍（developmental coordination disorder，DCD）的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题，通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础，以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类，最终转化为指南建议。并由国际 ...
Jing Hua +6 more
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Research Progress on Inhibition of Recrystallization of Ice Cream Crystals [PDF]
, 2023 Ice cream has the characteristic of thermodynamic instability. During processing, storage, transportation, and sales, temperature fluctuations cause recrystallization of ice crystals and then increase the average size of ice crystals, which leads to ...
Aiguo LIU +5 more
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Establishment and application of 72 alkaloids database with high resolution mass spectrometry [PDF]
, 2020 Objective The high resolution mass spectra database of common alkaloids were established and applied to the automatic screening of poisoning samples. Methods The accurate molecular mass and appropriate collision energy of each alkaloid was obtained by ...
Chunyan ZHOU +6 more
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Accurate Determination of Aldehydes, Ketones and Furans in Non-grape Wines by Headspace-Solid-Phase Microextraction Combined with High-Resolution Gas Chromatography-Orbitrap Mass Spectrometry [PDF]
, 2023 In this study, headspace-solid-phase microextraction extraction combined with gas chromatography-orbitrap-mass spectrometry (HS-SPME-GC-Orbitrap-MS) was used to establish a method for the simultaneous determination of five aldehydes and ketones and four ...
WANG Lei, WANG Chunguang, LIU Yaran, GU Peishan, LIU Jiani, WANG Liwei, ZHU Baoqing
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Research Progress in Techniques for Postharvest Preservation of Green Sweet Peppers [PDF]
, 2023 Green sweat peppers are rich in nutrients and diverse in shape and color. Apart from being eaten as a vegetable, it is widely used as seasoning and side dishes.
ZHANG Shaoping, LI Zhou, LIAN Dongmei, YAO Yunfa, JU Yudong, LAI Zhengfeng, WU Songhai, LIN Bizhen, HONG Jianji
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Gaoya dianqi, 2021 当±800 kV新东直流正常运行时,±800 kV昆柳龙线路与其部分线段并行,昆柳龙线路感应电压远远高于其他直流线路感应电压。文中利用有限元仿真软件建立新东直流和昆柳龙直流并行线段的二维仿真计算模型,仿真了新东直流输电线路带电运行情况下昆柳龙直流线路的感应电压特性。结果表明:柳北站—龙门站线路在静电场单独作用下,正极感应电压为6 kV,负极感应电压12 k V;在静电场与离子流场的合成电场作用下,正极感应电压为20.7 kV,负极感应电压30.5 kV,这与实际测量结果最高感应电压为42 kV较为接近 ...
杨晓峰 +7 more
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