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Earthquake Engineering and Engineering Vibration 2019年第3期18卷 695-701页

作者： zhu Fei Wang Jinting Jin feng Lu Liqiao State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China Changjiang Institute of Survey Planning Design and Research Wuhan 430010 China

Tuned liquid damper (TLD) and tuned liquid column damper (TLCD) are two types of passive control devices that are widely used in structural control. In this study, a real-time hybrid simulation (RTHS) technique is employed to investigate the diff erence in control performance between TLD and TLCD. A series of RTHSs is presented with the premise of the same liquid length, mass ratio, and structural parameters. Herein, TLD and TLCD are physically experimented, and controlled structures are numerically simulated. Then, parametric studies are performed to further evaluate the diff erent performance between TLD and TLCD. Experimental results demonstrate that TLD is more eff ective than TLCD under diff erent amplitude excitations.

关键词： tuned liquid damper tuned liquid column damper real-time hybrid simulation control effi ciency structural control parametric study

Surface-to-air missile sites detection agent with remote sensing images

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Science China(Information Sciences) 2021年第9期64卷 232-234页

作者： feng LIU Jihong zhu Wufan WANG Minchi KUANG Department of Computer Science and Technology Tsinghua University

Improvement and development in satellite and aerial photography have resulted in the rapid growth of the quantity and quality of remote sensing images, which are commonly used in military intelligence gathering, navigation, damage assessment, surveying, and mapping. Finding military facilities such as surface-to-air missile sites(SAMSs) from massive amounts of high-resolution remote sensing images,

关键词： Information Systems and Communication Service

Marinamide, a novel alkaloid and its methyl ester produced by the application of mixed fermentation technique to two mangrove endophytic fungi from the South China Sea

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Chinese Science Bulletin 2006年第12期51卷 1426-1430页

作者： zhu feng LIN Yongcheng Department of Chemistry and Chemical Engineering Foshan University Foshan 528000 China School of Chemistry and Chemical Engineering Zhongshan University Guangzhou 510275 China

A novel 1-isoquinolone analog desig- nated as marinamide (A) and its methyl ester (B), were produced by the application of mixed fermenta- tion technique to two mangrove endophytic fungi (strains Nos. 1924 and 3893) from the South China Sea. Their structures were elucidated by compre- hensive spectra methods (mainly by 2D NMR) as 4- (2-pyrrolyl)-1-isoquinolone-3-carboxylic acid (A) and methyl 4-(2-pyrrolyl)-1-isoquinolone-3-carboxylate (B), respectively. Compounds A and B were not obtained when either strain was cultured individually under the same conditions. The results showed that the appli- cation of mixed fermentation technique maybe rep- resents a potentially important approach to discover novel metabolites.

关键词：内生真菌混合发酵代谢物生物碱甲酯

Influence of bottom blowing oxygen on dust emission in converter steelmaking

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Journal of Iron and Steel Research International 2021年第9期28卷 1105-1113页

作者： Wei-feng Li Rong zhu Chao feng Bao-chen Han Guang-sheng Wei School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials University of Science and Technology BeijingBeijing 100083China

With the importance of the steelmaking industry in the economy and its negative impacts on the environment,reducing dust emissions is a vital focus in this ***,the theory of dust generation in converter steelmaking process was analyzed and the influence of bottom blowing oxygen on dust generation was obtained through experimental *** industrial test was carried out in a 120-t bottom combined blown O_(2)–CaO steelmaking *** results show that lowering the lance position can reduce the amount of *** emission rate of the converter is also found to be in direct proportion to the decarburization *** a result,the proposed bottom blowing O_(2)–CaO steelmaking converter can technically reduce the amount of dust and improve the recovery rate of *** more bottom blowing oxygen,the dust content is lower with the dust peak appearing *** evaporation theory,followed by the bubble theory,plays the primary role in the dust generation of bottom blowing oxygen *** points out the direction for the technology research and development of reducing dust generation.

关键词： Steelmaking converter Dust emission Bottom blowing O_(2)-CaO Evaporation theory Bubble theory

Variation of bacterial community associated with Phaeodactylum tricornutum in response to different inorganic nitrogen concentrations

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Acta Oceanologica Sinica 2018年第12期37卷 118-128页

作者： SHI feng WEI Xiaoxue feng Jianfeng SUN Yingxue zhu Lin Key Laboratory of Pollution Process and Environmental Criteria of Ministry of Education and Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University

Specific bacterial communities interact with phytoplankton in laboratory algal cultures. These communities influence phytoplankton physiology and metabolism by transforming and exchanging phytoplankton-derived organic matter. Functional bacterial groups may participate in various critical nutrients fluxes within these associations, including nitrogen(N) metabolism. However, it is unclear how bacterial communities and the associated algae respond to changes of phycosphere N conditions. This response may have far-reaching implications for global nutrient cycling, algal bloom formation, and ecosystem function. Here, we identified changes in the bacterial communities associated with Phaeodactylum tricornutum when co-cultured with different forms and concentrations of N based on the Illumina HiSeq sequencing of 16 S rRNA *** analysis identified Proteobacteria and Bacteroidetes as the dominant phyla, accounting for 99.5% of all sequences. Importantly, bacterial abundance and community structure were more affected by algal abundance than by the form or concentration of inorganic N. The relative abundance of three gammaproteobacterial genera(Marinobacter, Algiphilus and Methylophaga) markedly increased in N-deficient cultures. Thus, some bacterial groups may play a role in the regulation of N metabolism when co-cultured with ***.

关键词： Phaeodactylum tricornutum nitrogen concentrations nitrogen forms bacterial diversity community structure Gammaproteobacteria

Sparse Modal Decomposition Method Addressing Underdetermined Vortex-Induced Vibration Reconstruction Problem for Marine Risers

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China Ocean Engineering 2024年第2期38卷 285-296页

作者： DU Zun-feng zhu Hai-ming YU Jian-xing State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation School of Civil EngineeringTianjin UniversityTianjin 300350China

When investigating the vortex-induced vibration(VIV)of marine risers,extrapolating the dynamic response on the entire length based on limited sensor measurements is a crucial step in both laboratory experiments and fatigue monitoring of real *** problem is conventionally solved using the modal decomposition method,based on the principle that the response can be approximated by a weighted sum of limited vibration ***,the method is not valid when the problem is underdetermined,i.e.,the number of unknown mode weights is more than the number of known *** study proposed a sparse modal decomposition method based on the compressed sensing theory and the Compressive Sampling Matching Pursuit(Co Sa MP)algorithm,exploiting the sparsity of VIV in the modal *** the validation study based on high-order VIV experiment data,the proposed method successfully reconstructed the response using only seven acceleration measurements when the conventional methods failed.A primary advantage of the proposed method is that it offers a completely data-driven approach for the underdetermined VIV reconstruction problem,which is more favorable than existing model-dependent solutions for many practical applications such as riser structural health monitoring.

关键词： motion reconstruction vortex-induced vibration(VIV) marine riser modal decomposition method compressed sensing

Mechanochemistry in cancer cell metastasis

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Chinese Chemical Letters 2019年第1期30卷 7-14页

作者： Di Zhang feng feng Ruping Liu Wenjia zhu Li Yao State Key Laboratory for Structural Chemistry of Unstable and Stable Species CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Science University of Chinese Academy of Sciences Beijing Institute of Graphic Communication

Metastasis is the leading cause of death in people with cancer. In the series of steps comprising metastasis process, mechanochemistry plays crucial roles. In this review, we introduced the mechanical factors in cancer cell metastasis, intracellular mechanical sensors and methods for measuring the mechanical forces of tumor cells. The recent researches on the contribution of mechanochemistry to metastasis and future perspectives were summarized.

关键词： Mechanochemistry Mechanical force Adhesion Migration Tumor metastasis

Parathyroid adenoma combined with a rib tumor as the primary disease: A case report

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World Journal of Clinical Cases 2020年第19期8卷 4681-4687页

作者： Lu Han Xiao-feng zhu College of Medicine Jiamusi UniversityJiamusi 154000Heilongjiang ProvinceChina Department of Thoracic Surgery The First Affiliated Hospital of Jiamusi UniversityJiamusi 154000Heilongjiang ProvinceChina

BACKGROUND Parathyroid adenoma is a benign parathyroid tumor,with serum parathyroid hormone and calcium ion concentrations as the typical basis for *** clinical manifestations are complex and changeable;thus it is easily missed or *** 85%of patients with parathyroid adenoma develop primary hyperparathyroidism,and abnormalities in bones,kidneys and other organs can *** tumors are *** SUMMARY We report a rare case of fibrocystic osteitis associated with a parathyroid adenoma,which was discovered by chance due to a rib *** elevated serum parathyroid hormone and calcium ion were found before *** suspected primary hyperparathyroidism,and color Doppler ultrasound suggested the presence of a thyroid *** informed consent by the patient and her family,we first removed the rib tumor,and one week later,resection of the parathyroid adenoma and thyroid mass was performed on both sides,and the patient recovered well after *** In the case of parathyroid adenoma combined with brown tumor,the bone cyst will gradually decrease in size with time without *** not,surgery should be performed as soon as possible.

关键词： Parathyroid adenoma Rib Brown tumor Primary hyperparathyroidism Treatment Operation Case report

Photoluminescence of CdTe quantum dots ligated with caprylic acid synthesized at low temperature

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International Journal of Smart and Nano Materials 2011年第2期2卷 51-58页

作者： Ming-Qiang zhu Li Peng Ming-feng zhu Wuhan National Laboratory for Optoelectronics College of Optoelectronic Science&TechnologyHuazhong University of Science&TechnologyWuhan430074China

Photoluminescent semiconductor nanocrystals or quantum dots(QDs)are usually produced using expensive ligands and solvents at high temperature above 280◦C to ensure high-quality optical properties,particularly the photoluminescence of *** reproducibility of highly stable photoluminescence in QD preparation,in most cases,varies depending on many effects,such as the ligand used and *** a facile preparation of photoluminescent semiconductor CdTe nanocrystals or quantum dots(QDs)is conducted in the presence of caprylic acid at moderate temperatures between 80–140◦C,which are much lower than the high temperatures used in conventional organic-phase preparation of CdTe *** results show that the optical properties of CdTe QDs depend considerably on the reaction time,temperature and ligand used.

关键词： photoluminescence cadmium telluride quantum dot caprylic acid ligand

A Note on Certain Block Spaces on the Unit Sphere

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Acta Mathematica Sinica,English Series 2006年第6期22卷 1843-1846页

作者： Xiao feng YE Xiang Rong zhu Department of Mathematics (Xixi Campus) Zhejiang University Hangzhou 310028 P. R. China

In this note, we clarify a relation between block spaces and the Hardy space. We obtain Bq^0.v belong to H^1（S^n-1）＋L（ln＋L）^1＋v（s^n-1）,v〉-1,q〉1,Furthermore,if v≥ 0, q 〉 1. we verify that block spaces Rq... 详细信息

关键词： block spaces Hardy space