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Bidirectional asymmetric acoustic focusing with two flat acoustic metasurfaces

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Chinese Physics B 2018年第12期27卷 92-97页

作者： Di-Chao Chen xing-feng Zhu qi Wei Da-Jian Wu Jiangsu Key Laboratory on Opto-Electronic Technology School of Physics and Technology Nanjing Normal University

We design an asymmetric transmission system(ATS)with two flat acoustic metasurfaces(AMs)to yield bidirectional asymmetric acoustic focusing(BAAF).The acoustic waves could be focused on both sides of the ATS with different focal lengths and *** achieve high intensity energy concentration,the accelerating acoustic beams are selected to realize the *** working bandwidth of the BAAF based on our ATS could reach ～0.4 k *** is found that by adjusting the distance between two flat AMs,the focal length and intensity of the bidirectional focusing could easily be *** the distance between two flat AMs is large enough,the BAAF even could be converted into a unidirectional acoustic *** proposed BAAF may find applications in non-destructive evaluation,biomedical imaging and medical diagnosis.

关键词： asymmetric focusing acoustic metasurface phase manipulation

Development and prospect of near-infrared spectroscopy-assisted schizophrenia diagnosis based on bibliometrics

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World Journal of Psychiatry 2025年第1期15卷 7-11页

作者： Yan Zhang Hao-Yu xing Juan Yan Administration Office Lishui Second People’s HospitalLishui 323060Zhejiang ProvinceChina Department of Medical Engineering The Affiliated Mental Health Center&Hangzhou Seventh People's HospitalZhejiang University School of MedicineHangzhou 310013Zhejiang ProvinceChina Quality Control Office The Affiliated Mental Health Center&Hangzhou Seventh People's HospitalZhejiang University School of MedicineHangzhou 310013Zhejiang ProvinceChina

In this editorial,we comment on the recent article by Fei et al exploring the field of near-infrared spectroscopy(NIRS)research in schizophrenia from a bibliometrics *** recent years,NIRS has shown unique advantages in the auxiliary diagnosis of schizophrenia,and the introduction of bibliometrics has provided a macro perspective for research in this *** the opportunities brought about by these technological developments,remaining challenges require multidi-sciplinary approach to devise a reliable and accurate diagnosis system for ***,NIRS-assisted technology is expected to contribute to the division of methods for early intervention and treatment of schizophrenia.

关键词： Bibliometrics Schizophrenia Near-infrared spectroscopy Diagnostic technique Data analysis

Thermal behavior of 4,6-Dinitro-5,7-diamino benzenfuroxan（CL-14）

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Thermal behavior of 4,6-Dinitro-5,7-diamino benzenfuroxan（C...

SMARCB1(INI1)缺失性鼻腔鼻窦癌2例并文献复习

中国化学会第十五届全国化学热力学和热分析学术会议

作者： Xue Liang~(1,2),Zhao feng-qi~(1*),xing Xiao-Ling~1,Xu Si-Yu~1,Yi Jian-Hua~1, Gao Hong-Xu~1,Pei qing,Hu Rong-Zu~1 1 National Key Lab of Science and Technology on Propellant and Explosive Combustion,Xi''an Modern Chemistry Research Institute,Xi''an City 710065,China 2 School of Chemistry and Materials Science,Shaanxi Normal University,Xi''an City 710062,China

＜正＞4,6-Dinitro-5,7-diamino benzenfuroxan（CL-14） is one of insensitive and high energetic materials,which has emerged as a new composite explosive with potiential high safety ***-14 was synthesized through azidcat... 详细信息

关键词： 4,6-Dinitro-5,7-diamino benzenfuroxan(CL-14) thermal behavior specific heat capacity adiabatic time-to-explosion

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诊断病理学杂志 2022年第12期29卷 1163-1165页

作者：许文静齐兴峰余英豪曲利娟叶显宗联勤保障部队第九○○医院病理科福建医科大学福总临床医学院厦门大学附属东方医院福州350025

高级别鼻腔鼻窦癌形态常有重叠,分型困难,治疗效果差。近年来,随着分子病理检测技术的提升,越来越多新亚型得以被发现,例如NUT癌、SMARCB1(INI1) 缺失的鼻腔鼻窦癌[SMARCB1(INI1)-deficient sinonasal carcinoma, SDSC]、SMARCA4缺失性... 详细信息

高级别鼻腔鼻窦癌形态常有重叠,分型困难,治疗效果差。近年来,随着分子病理检测技术的提升,越来越多新亚型得以被发现,例如NUT癌、SMARCB1(INI1) 缺失的鼻腔鼻窦癌[SMARCB1(INI1)-deficient sinonasal carcinoma, SDSC]、SMARCA4缺失性癌和IDH突变型癌。

关键词：鼻腔鼻窦癌 SMARCB1 INI1 鉴别诊断预后

Glucose-conjugated chitosan nanoparticles for targeted drug delivery and their specific interaction with tumor cells

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Frontiers of Materials Science 2014年第4期8卷 363-372页

作者： Jing LI Fang-Kui MA qi-feng DANG xing-Guo LIANG Xi-Guang CHEN College of Food Science and Engineering Ocean University of China Qingdao 266003 China Freshwater Fisheries Research Institute of Shandong Province Jinan 250013 China College of Marine Life Science Ocean University of China Qingdao 266003 China

A novel targeted drug delivery system, glucose-conjugated chitosan nanoparticles （GCNPs）, was developed for specific recognition and interaction with glucose transporters （Gluts） over-expressed by tumor cells. GC was synthesized by using succinic acid as a linker between glucosamine and chitosan （CS）, and successful synthesis was confirmed by NMR and elemental analysis. GCNPs were prepared by ionic crosslinking method, and characterized in terms of morphology, size, and zeta potential. The optimally prepared nanoparticles showed spherical shapes with an average particle size of （187.9 ± 3.8） nm and a zeta potential of （-15.43 ± 0.31） mV. The GCNPs showed negligible cytotoxicity to mouse embryo fibroblast and 4T1 cells. Doxorubicin （DOX） could be efficiently entrapped into GCNPs, with a loading capacity and encapsulation efficiency of 20.11% and 64.81%, respectively. DOX-Ioaded nanoparticles exhibited sustained-release behavior in phosphate buffered saline （pH 7.4）. In vitro cellular uptake studies showed that the GCNPs had better endocytosis ability than CSNPs, and the antitumor activity of DOX/GCNPs was 4-5 times effectiveness in 4T1 cell killing than that of DOX/CSNPs. All the results demonstrate that nanoparticles decorated with glucose have specific interactions with cancer cells via the recognition between glucose and Gluts. Therefore, Gluts-targeted GCNPs may be promising delivery agents in cancer therapies.

关键词： drug delivery target nanoparticle glucose transporter (Glut) chitosan(CS)

Giant ooids of microbial origin from the Zhangxia Formation(Cambrian Miaolingian Series)in North China

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Journal of Palaeogeography 2022年第1期11卷 52-68页

作者： Ming-Yue Dai Hua-Shan Zhang Wei Zheng Yong-An qi Zhi-feng xing Zhen Zhang School of Resources and Environment Henan Polytechnic UniversityJiaozuo 454003China Key Laboratory of Biogenic Traces and Sedimentary Minerals of Henan Province Henan Polytechnic UniversityJiaozuo 454003China

The role of microorganisms in the formation of giant ooids is one of the areas of long-term controversy in ooidal research,but it has not been confirmed *** giant ooids developed in the Zhangxia Formation of the Cambrian Miaolingian Series in North *** ooids in the study area were examined by using Polarized Light Microscopy and Field Emission Environmental Scanning Electron *** nuclei of the ooids consist of micritic pellets or radial ooids with diameters less than 2 mm and are formed in a weak-agitating seawater *** cortices are concentric,and are characterized by the alternations of the dark laminae of micritic calcite or Girvanella filaments and light laminae of microsparry *** the environments of inter-bank sea with the alternating development of medium and low energy and chiefly weak-agitating conditions,giant ooids were formed under the joint action of Girvanella filamentous growth,biologically-induced calcification and/or biologically-influenced calcification and inorganic calcium carbonate *** microfossils of Girvanella are distributed in inner and outer cortices of giant ooids,especially dense in the *** distinctly indicates that microbes play a significant role in the formation of giant ooids,and also provides a vital example for discussing the microbial origin of giant ooids.

关键词： Girvanella filament Microbial origin Giant ooid Cambrian Miaolingian Series Zhangxia Formation North China

Differential quadrature time element method for structural dynamics

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Acta Mechanica Sinica 2012年第3期28卷 782-792页

作者： Yu-feng xing Jing Guo The Solid Mechanics Research Center Beihang University100191 BeijingChina

An accurate and efficient differential quadrature time element method （DQTEM） is proposed for solving ordi- nary differential equations （ODEs）, the numerical dissipation and dispersion of DQTEM is much smaller than that of the direct integration method of single/multi steps. Two methods of imposing initial conditions are given, which avoids the tediousness when derivative initial conditions are imposed, and the numerical comparisons indicate that the first method, in which the analog equations of initial displacements and velocities are used to directly replace the differential quadra- ture （DQ） analog equations of ODEs at the first and the last sampling points, respectively, is much more accurate than the second method, in which the DQ analog equations of initial conditions are used to directly replace the DQ analog equations of ODEs at the first two sampling points. On the contrary to the conventional step-by-step direct integration schemes, the solutions at all sampling points can be obtained simultaneously by DQTEM, and generally, one differential quadrature time element may be enough for the whole time domain. Extensive numerical comparisons validate the effi- ciency and accuracy of the proposed method.

关键词： Differential quadrature rule Direct integrationmethod Time element Phase error. Artificial damping

Soil concentrations and soil-air exchange of organochlorine pesticides along the Aba profile, east of the Tibetan Plateau, western China

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Frontiers of Earth Science 2013年第4期7卷 395-405页

作者： Hongxia LIU Shihua qi Dan YANG Ying HU feng LI Jia LIU Xinli xing State Key Laboratory of Biogeology and Environmental Geology School of Environmental Studies China University of Geosciences Wuhan 430074 China Hubei Key Laboratory of Mine Environmental Pollution Control & Remediation School of Environmental Science and Engineering Hubei Polytechnic University Huangshi 435003 China Faculty of Engineering China University of Geosciences Wuhan 430074 China

Mianzhu--Aba profile, east of the Tibetan Plateau, was selected to study the occurrence of organo- chlorine pesticides （OCPs） along an altitudinal gradient. Dichlorodiphenyltrichloroethanes （DDTs）, hexachlorocy- clohexanes （HCHs） and Aldrin, Dieldrin and Endrin （Drins） in surface soils were detected in winter （March） and summer （July）. Soil concentrations （ng.g-1, dw） in winter and summer ranged as follws： DDTs, 0.37-179.16 and 0.32-42.57; HCHs, 0.14-10.76 and 0.55-32.71; Drins, N.D-3.99 and 0.02-6.93, respectively. Main soil OCPs were p,p＇-DDT, p,p＇-DDE, fl-HCH and Drins, among which Drins were rarely reported in current literature of the Tibetan Plateau. Higher OCP concentra- tions in the profile were attributed close to the agricultural fields of the Sichuan Basin, current lindane and non- dicofol DDTs inputs, and also long-range atmospheric transport from abroad. Soil OCP concentrations underwent obvious seasonal variation, with higher DDTs in winter and higher HCHs and Drins in summer. It may be caused by climatic conditions, summer monsoon type, and physico-chemical properties of such contaminants. Though ＂rest＂ phenomenon occurred in some sampling sites, HCHs and Drins showed an increasing trend with increasing altitude, while DDTs showed an evident decrease with increasing altitude. The altitudinal distribu- tions of OCPs were all consistent with previous findings in other mountainous regions. A primary fugacity analysis on OCPs soil-air exchange indicated that the profile may be secondary sources for HCHs and Endrin. As with Aldrin,Dieldrin, and DDTs, the profile may be both secondary sources and sinks.

关键词： organochlorine pesticides (OCPs) seasonal variation altitudinal pattern soil-air exchange Mian-zhu--Aba profile east of the Tibetan Plateau

Identification and fine mapping of quantitative trait loci for seed vigor in germination and seedling establishment in rice

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Journal of Integrative Plant Biology 2014年第8期56卷 749-759页

作者： Lixia Xie Zhengwei Tan Yuan Zhou Rongbao Xu Laibao feng Yongzhong xing Xiaoquan qi Key Laboratory of Plant Molecular Physiology Institute of Botany the Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Continuing Education Shandong Television University National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University

Seed vigor is an index of seed quality that is used to describe the rapid and uniform germination and the establish- ment of strong seedlings in any environmental conditions. Strong seed vigor in low-temperature germination conditions is particularly important in direct-sowing rice production systems. However, seed vigor has not been selected as an important breeding trait in traditional breeding programs due to its quantitative inherence. In this study, we identified and mapped eight quantitative trait loci （QTLs） for seed vigor by using a recombinant inbred population from a cross between rice （Oryza sativa L. ssp. indica） cultivars ZS97 and MH63. Conditional QTL analysis identified qSV-1, qSV-Sb, qSV-6a, qSV- 6b, and qSV-11 influenced seedling establishment and that qSV- 5a, qSV-Sc, and qSV-8 influenced only germination. Of these, qSV-1, qSV-Sb, qSV-6a, qSV-6b, and qSV-8 were low-tempera- ture-specific QTLs. Two major-effective QTLs, qSV-1, and qSV-5cwere narrowed down to 1.13-Mbp and 4oo-kbp genomic regions, respectively. The results provide tightly linked DNA markers for the marker-assistant pyramiding of multiple positive alleles for increased low-temperature germination seed vigor in both normal and environments.

关键词： Conditional quantitative trait locus mapping germination seedling establishment seed vigor rice