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Passive Control of Flow-Induced Vibration(FIV)by Helical Strakes for Two Staggered Flexible Cylinders

China Ocean Engineering 2021年第4期35卷 475-489页

作者： xu Wan-hai WANG qi-cheng qiN wen-qi DU Zun-feng State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China School of Civil Engineering Tianjin UniversityTianjin 300072China CIMC Offshore Co.Ltd Shenzhen 518000China

Helical strake is a widely-used device for passive flow-induced vibration(FIV)control of cylindrical *** is omnidirectional and can effectively reduce FIV response *** on the passive FIV control for cylindrical structures are mainly concerned with a single isolated cylinder,while the influence of wake interference between multiple cylinders on FIV suppression devices is less considered up to *** engineering applications,multiple flexible cylinders with large aspect ratios can be subjected to complex flow forces,and the effects of wake interference are *** FIV suppression effect of helical strake of a common configuration(17.5D pitch and 0.25D height,where D is the cylinder diameter)in two staggered cylinders system is still *** paper systematically studied the FIV response of multiple cylinders system fitted with the helical strakes by model *** relative spatial position of the two cylinders is fixed at S=3.0D and T=8.0D,which ensures the cylindrical structures in the flow interference *** experimental results show that the helical strakes effectively reduce the FIV response on staggered upstream cylinder,and the suppression efficiency is barely affected by the smooth or straked downstream *** corresponding FIV suppression efficiency on the downstream cylinder is remarkably reduced by the influence of the upstream wake *** wake-induced vibration(WIV)phenomenon is not observed on the staggered downstream cylinder,which normally occurs on the downstream straked cylinder in a tandem arrangement.

关键词： flow-induced vibration(FIV) passive control helical strakes flexible cylinders staggered arrangement

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Based on non-targeted metabolomics for differential components screening of Rosae Chinensis Flos and Rosae Rugosae Flos and their quality evaluation

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Traditional Medicine Research 2025年第2期10卷 1-15页

作者： xu Liang Ni-Hui Zhang Zhi-Lai Zhan Guang-Lu Chang Yan Gao Xia Li wen-Yuan Gao School of Pharmaceutical Science and Technology Faculty of MedicineTianjin UniversityTianjin 300193China State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs China Academy of Chinese Medical SciencesBeijing 100700China Key Laboratory of Modern Chinese Medicine Resources Research Enterprises Tianjin 300402China

Background:Rosa chinensis *** Rosa rugosa *** not only of ornamental value,but also edible flowers and the flower buds have been listed in the Chinese Pharmacopoeia as traditional *** two plants have some differences in efficacy,but the flower buds are easily confused for similar *** addition,large-scale cultivation of ornamental rose flowers may lead to a decrease in the effective components of medicinal ***,it is necessary to study the chemical composition and make quality evaluation of Rosae Chinensis Flos(Yueji)and Rosae Rugosae Flos(Meigui).Methods:In this study,40 batches of samples including Meigui and Yueji from different regions in China were collected to establish high-performance liquid chromatography ***,the fingerprints data was analyzed using principal component analysis,hierarchical cluster analysis,and partial least squares discriminant analysis analysis chemometrics to obtain information on intergroup differences,and non-targeted metabolomic techniques were applied to identify and compare chemical compositions of samples which were chosen from groups with large *** compounds were screened by orthogonal partial least-squares discriminant analysis and S-plot,and finally multi-component quantification was performed to comprehensively evaluate the quality of Yueji and ***:The similarity between the fingerprints of 40 batches roses and the reference print R was 0.73 to 0.93,indicating that there were similarities and differences between the *** principal component analysis and hierarchical cluster analysis of fingerprints data,the samples from different origins and varieties were intuitively divided into four *** least-squares discriminant analysis analysis showed that Meigui and Yueji cluster into two categories and the model was reliable.A total of 89 compounds were identified by high resolution mass spectrometry,mainly were flavonoids and flavon

关键词： Rosa chinensis Jacq. Rosa rugosa Thunb. metabolomics chemometrics multiple component quantification quality evaluation

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卵胎生硬骨鱼许氏平鲉繁殖生物学研究进展

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中山大学学报（自然科学版）（中英文） 2025年第1期64卷 106-115页

作者：齐鑫杨欣琳温海深中国海洋大学水产学院山东青岛266003

卵胎生作为卵生向胎生进化的中间状态,具有子代成活率高的特性。因此,卵胎生许氏平鲉成为我国重要的北方海水养殖对象之一。然而,大量养殖该物种又带来了一些繁殖过程中的实际问题。比如,网箱养殖的亲鱼出现明显的交配失败,导致其子代... 详细信息

卵胎生作为卵生向胎生进化的中间状态,具有子代成活率高的特性。因此,卵胎生许氏平鲉成为我国重要的北方海水养殖对象之一。然而,大量养殖该物种又带来了一些繁殖过程中的实际问题。比如,网箱养殖的亲鱼出现明显的交配失败,导致其子代出生率极低;妊娠期亲鱼母胎器官发育障碍,导致仔鱼胎死腹中;早产、难产导致的亲鱼、仔鱼大量死亡等。本综述将针对上述问题,分别探讨许氏平鲉交配发生、妊娠维持及分娩启动相关的内分泌调控机制,以期为后续研究提供潜在思路,最终实现水产养殖问题的解决。

关键词：卵胎生许氏平鲉繁殖生理

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HPLC法同时测定降脂颗粒中5种成分

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中成药 2017年第3期39卷 532-535页

作者：马赟王起文徐国华纪乐军陈建伟李祥南京中医药大学药学院江苏南京210023 江苏神华药业有限公司江苏淮安211600

目的建立HPLC法同时测定降脂颗粒(丹参、虎杖、茵陈等)中5种成分的含有量。方法该药物甲醇提取液的分析采用Hanbon-C18色谱柱(4.6 mm×250 mm,5μm);以乙腈(A)-0.1%磷酸(B)为流动相,梯度洗脱;柱温30℃;体积流量1.0 mL/min;检测波长286 n... 详细信息

目的建立HPLC法同时测定降脂颗粒(丹参、虎杖、茵陈等)中5种成分的含有量。方法该药物甲醇提取液的分析采用Hanbon-C18色谱柱(4.6 mm×250 mm,5μm);以乙腈(A)-0.1%磷酸(B)为流动相,梯度洗脱;柱温30℃;体积流量1.0 mL/min;检测波长286 nm(0~30、40~50 min)和203 nm(30~40 min)。结果绞股蓝皂苷A、绿原酸、虎杖苷、丹酚酸B、大黄素分别在0.176~2.46、0.056~0.84、0.36~5.40、0.192~2.88、0.12~1.80μg范围内线性关系良好(r>0.999 0),平均加样回收率97.17%~102.59%,RSD 1.9%~2.9%。结论该方法准确简便,可用于降脂颗粒的质量控制。

关键词：降脂颗粒绞股蓝皂苷A 绿原酸虎杖苷丹酚酸B 大黄素 HPLC

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Primary parenchymal squamous cell carcinoma of the kidney:A case report

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World Journal of Clinical Cases 2025年第4期13卷 34-40页

作者： Zhi-Hui Zheng Bo Shao Chao-Min xu Ke Wang Jia-Zhu wen Li-Kang Luo Jia-Cheng Guan Department of Ultrasound The Second People’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Radiology Shulan(Quzhou)HospitalQuzhou 324000Zhejiang ProvinceChina Department of Radiology The Second People’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Pathology The Second people’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina

BACKGROUND Primary squamous cell carcinoma(SCC)of the renal parenchyma is extremely rare,with only nine cases *** SUMMARY This study reports a 51-year-old man with primary SCC of the renal *** patient was admitted with recurrent dull pain and discomfort in the right lumbar region,which had worsened over 2 weeks,accompanied by painful gross *** antigen(SCCA)levels were elevated,and imaging revealed a renal mass with associated *** patient underwent laparoscopic unilateral nephrectomy and lymph node *** pathology confirmed highly differentiated SCC with necrosis in the right renal parenchyma,with negative renal pelvis and *** pathological stage was *** months after surgery,the tumor recurred with involvement of the liver,right psoas major muscle,and inferior vena *** patient refused chemotherapy and succumbed to the disease 6 months postoperatively due to disease *** We report a case of primary SCC of the renal parenchyma,a rare renal *** clinical symptoms,laboratory tests,and imaging findings are nonspecific,making accurate and timely diagnosis *** to the literature,for patients with renal calculi accompanied by a renal mass,elevated serum SCCA levels,and magnetic resonance imaging showing cystic or cystic-solid masses within the kidney with pseudocapsules and heterogeneous mild enhancement,the possibility of this disease should be considered.

关键词： Renal tumor Renal parenchyma Squamous cell carcinoma Renal calculi Computed tomography Case report

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Sepiolite/Cu_2O/Cu photocatalyst: Preparation and high performance for degradation of organic dye

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Journal of Materials Science & Technology 2019年第3期35卷 285-291页

作者： Peisan Wang Chunxia qi Luyuan Hao Pengchao wen Xin xu Chinese Academy of Sciences Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering University of Sciencend Technology of China Department of Chemistry Anhui Medical University Department of Chemical Engineering Hefei Normal University

A novel ternary sepiolite/Cu_2O/Cu(SCC) nanocomposite was successfully synthesized by a facile one-pot method. The Cu_2O/Cu nanoparticles in the SCC nanocomposite are well dispersed on the sepiolite surface. It exhibited enhanced photocatalytic performance in the degradation of congo red(CR), remarkably superior to that of Cu_2O or Cu_2O/Cu nanoparticles. Elemental copper in the SCC serves as a good electron acceptor to promote the transfer of photo-generated electrons in Cu_2O and suppress the recombination of the photo-generated electrons and holes of the composite. The enhanced photocatalytic efficiency is attributed to the synergistic effect of sepiolite and Cu_2O/Cu. This type of SCC nanocomposites is a promising candidate as photocatalytic material for environmental protection.

关键词： Sepiolite/Cu2O/Cu Nanocomposite Photocatalytic Organic dye

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我国地方蛋鸭品种遗传结构及遗传分化

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四川农业大学学报 2010年第1期28卷 93-98页

作者：宋卫涛李慧芳韩威朱文奇徐文娟陈宽维中国农业科学院家禽研究所江苏省家禽遗传育种实验室江苏扬州225003

应用16对多态性较好的微卫星标记,结合PCR片段分析技术,对我国10个地方蛋鸭品种和1个引入蛋鸭品种进行了遗传结构和遗传分化检测。16个微卫星位点在11个蛋鸭品种中显示高度多态性。等位基因数、遗传杂合度和多态信息含量等参数表明:我... 详细信息

应用16对多态性较好的微卫星标记,结合PCR片段分析技术,对我国10个地方蛋鸭品种和1个引入蛋鸭品种进行了遗传结构和遗传分化检测。16个微卫星位点在11个蛋鸭品种中显示高度多态性。等位基因数、遗传杂合度和多态信息含量等参数表明:我国地方蛋鸭的遗传多样性较为丰富。Structure程序在预先未标明品种起源的条件下准确推断出11个蛋鸭种群个体所属类别,并计算各个群体所属类别的基因组分数。Structure聚类图在K=3时将11个品种分为亚群Ⅰ(包括:荆江麻鸭、恩施麻鸭、三穗鸭、金定鸭和山麻鸭),亚群Ⅱ(包括:连城白鸭、绍兴鸭、微山麻鸭、莆田黑鸭和攸县麻鸭)和亚群Ⅲ(康贝尔鸭),这与11个蛋鸭品种的地理分布及形成历史相吻合。11个蛋鸭品种群体中均存在具有复杂遗传基础的个体,迁移个体只分布在恩施麻鸭、山麻鸭和攸县麻鸭群体中。

关键词：遗传结构遗传分化鸭微卫星 Structure程序

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Visible light response ZnO-C_(3)N_(4) thin film photocatalyst

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Rare Metals 2021年第1期40卷 96-104页

作者： Yue Zhang Shu-Man Zhao qi-wen Su Jun-Li xu School of Science Northeastern University.Shenyang 110004China

Nanoflower-like ZnO-C_(3)N_(4) thin film with a porous net structure was successfully synthesized by a simple chemical corrosion *** prepared ZnOC_(3)N_(4) thin films presented remarkable photocatalytic activities for the degradation of methyl orange under visible light irradiation,and more than 90%methyl orange was removed from water by ZnO-C_(3)N_(4) ***,the ZnO-C_(3)N_(4) composite presented an enhanced photocatalytic *** loading content of C_(3)N_(4) had a great effect on the photocatalytic ***,the photocatalytic activities were higher in acidic media than those in alkaline *** adsorption of methyl orange was enhanced,and the recombination of photogenerated electrons and holes was suppressed with a suitable content of C_(3)N_(4).However,too much loading content of C_(3)N_(4) resulted in a poor dispersion of C_(3)N_(4) as the aggregated C_(3)N_(4) can behave as recombination *** addition,the prepared ZnO-C_(3)N_(4) thin film can be used for the water splitting in water-methanol system under simulated solar light irradiation.

关键词： ZnO-C_(3)N_(4)thin film Photodegradation Water splitting Visible light irradiation Photocatalytic stability

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Experimental Research of Surface Roughness Effects on Highly-Loaded Compressor Cascade Aerodynamics

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Journal of Thermal Science 2014年第4期23卷 307-314页

作者： CHEN Shao-wen xu Hao WANG Song-tao WANG Zhong-qi Energy Science and Engineering School Harbin Institute of Technology

Aircraft engines deteriorate during continuous operation under the action of external factors including fouling, corrosion, and abrasion. The increased surface roughness of compressor passage walls limits airflow and leads to flow loss. However, the partial increase of roughness may also restrain flow separation and reduce flow loss. It is necessary to explore methods that will lower compressor deterioration, thereby improving the overall performance. The experimental research on the effects of surface roughness on highly loaded compressor cascade aerodynamics has been conducted in a low-speed linear cascade wind tunnel. The different levels of roughness are arranged on the suction surface and pressure surface, respectively. Ink-trace flow visualization has been used to measure the flow field on the walls of cascades, and a five-hole probe has been traversed across one pitch at the outlet. By comparing the total pressure loss coefficient, the distributions of the secondary-flow speed vector, and flow fields of various cases, the effects of surface roughness on the aerodynamics of a highly loaded compressor cascade are analyzed and discussed. The results show that adding surface roughness on the suction surface and pressure surface make the loss decrease in most cases. Increasing the surface roughness on the suction surface causes reduced flow speed near the blade, which helps to decrease mixing loss at the cascades outlet. Meanwhile, adding surface roughness on the suction surface restrains flow separation, leading to less flow loss. Various levels of surface roughness mostly weaken the flow turning capacity to various degrees, except in specific cases.

关键词： Highly loaded compressor linear cascades surface roughness aerodynamic performance experimental research

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Evaluation of genetically modified rice detection methods 2011/884/EU and 2008/289/EC proposed by the European Union

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Journal of Integrative Agriculture 2016年第12期15卷 2899-2910页

作者： XIAO qi-sheng xu wen-tao YANG Jie-lin PAN Liang-wen Technical Center for Animal Plant and Food Inspection and QuarantineShanghai Entry and Exit Inspection and Quarantine Bureau College of Food Science & Technology Shanghai Ocean University Beijing Laboratory for Food Quality and Safety/College of Food Science and Nutritional Engineering China Agricultural University

Increases in the number of cases of identified genetically modified （GM） rice contamination can be traced back to the first Rapid Alert System for Food and Feed （RASFF） in 2006. In response to the lack of reliable detection methods, Decision 2011/884/EU proposed that new screening methods replace Decision 2008/289/EC, to identify all possible GM rice products originating in China. However, the synergy brands （SYBR） Green real-time PCR assay proposed by Decision 2011/884/EU has been shown to lack conformity with other TaqMan methods currently in use. To evaluate the specificity and repeatability of the methods recommended in Decision 2011/884/EU and Decision 2008/289/EC, we collected 74 rice products originating from six countries or districts. The 74 rice samples were tested using the Decision 2011/884/EU and Decision 2008/289/ EC methods. The parallel use of different instruments and reagents were used for testing in parallel, and the results were analyzed statistically. To avoid the limitations of specific laboratories, eight GM organism detection laboratories in China participated in a collaborative trial. In our tests, 24.3% （18/74） of the samples tested were positive with the SYBR Green real-time PCR assay using the Decision 2011/884/EU method, but were negative with the TaqMan real-time PCR assay using the Decision 2011/884/EU and Decision 2008/289/EC methods. Sequencing the PCR-amplified CrylA（b/c） genes in three samples （6, 30 and 43） showed that the products consisted of primer dimers rather than the targeted sequence. The combined experimental results showed that testing for the nopaline synthase gene （NOS） of Agrobacterium tumefasciens terminator and CrylA（b/c） produced false-positive results when the Decision 2011/884/EU method was used. Because of the high rate of false-positive results, the Decision 2011/884/EU SYBR Green method to detect GM rice requires improvement.

关键词： genetically modified organism Decision 2011/884/EU SYBIR Green real-time PCR false positive

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