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Nano Research 2023年第2期16卷 2604-2610页

作者： Zhi-Ling Hou Kunrong Du yiqin zhang Song Bi Junying zhang College of Mathematics and Physics&Beijing Key Laboratory of Environmentally Harmful Chemical Analysis Beijing University of Chemical TechnologyBeijing 100029China 501 Department Xi’an Research Institute of High-TechXi’an 710025China

Designing highly reliable and practical microwave absorbers is one of the most important research directions in the microwave absorbing *** absorbents suffer from concentration-sensitivity and environmental-sensitivity dilemmas in practical ***,sea urchin-like aggregates of MnO_(2)nanotubes were synthesized by a simple hydrothermal method,which exhibit an outstanding impedance matching *** composites based on sea urchin-like aggregates of MnO_(2)nanotubes show excellent microwave absorption performance in a wide concentration domain from 20 wt.%to 70 wt.%,corresponding to electrical conductivities from 1.86×10^(−7)to 1.85×10^(−5)S/*** a wide concentration range of absorbent for excellent microwave absorption is mainly attributed to the beneficial impedance matching properties of sea urchin-like aggregates of hollow nanotubes.A competitive absorption bandwidth of 3.36 GHz is achieved at 1 mm thickness,which can be broadened to 13.4 GHz by structural *** work shows a new scheme for designing reliable and practical microwave absorbers benefit from the wide absorbent concentration domain.

关键词： MnO_(2)nanotubes sea urchin-like aggregates broadband microwave absorption wide filling range

Huge Chinese Healthcare Market Captivates Foreign Capita

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China Today 2013年第3期62卷 40-41页

作者： zhang yiqin

CHINA’S vast healthcare market is expanding and undoubtedly tantalizing foreign investors. However, restrained by China’s regulations on foreign investment in the establishment of new hospitals, for many years their involvement has been limited. Good news for foreign investors came on December 30, 2011. China’s National Development and Reform Commission together with the Ministry of Commerce issued the new edition of the Catalogue of Industries

关键词：医疗市场外国人中国国家发展和改革委员会外商投资投资者医疗机构商务部

Creating A ordable Art

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China Today 2013年第1期62卷 64-65页

作者： zhang yiqin

Derivative art has been through decades of development in the *** still in its infancy in China, it has started to take o , and market prospects are bright.

关键词：艺术英文期刊英语学习阅读训练中国经济

A mango biological fingerprint anti-counterfeiting method based on Fuzzy C-means clustering

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Food Innovation and Advances 2023年第1期2卷 21-27页

作者： Chaoyu Shen yiqin zhang Luyao Chen Adele Lu Jia Jiankang Cao Weibo Jiang College of Food Science and Nutritional Engineering China Agricultural UniversityBeijing 100083PR China

The anti-counterfeiting of agricultural products plays an important role in protecting the rights and interests of consumers and maintaining the healthy development of the food *** anti-counterfeiting technology mainly relies on anti-counterfeiting features of packaging or labeling,which has the risk of being copied and *** fingerprint anti-counterfeiting is a method of anti-counterfeiting that takes the biological fingerprint of agricultural products as the anti-counterfeiting *** paper aims to take the distribution of lenticels on the surface of mango as a biological fingerprint,and propose a mango biological fingerprint anti-counterfeiting *** the mango ripens,the peel color of mango will change significantly,which will affect the accuracy of anti-counterfeiting *** this paper,the images of ripe mangoes are classified by Fuzzy C-means clustering,and appropriate image enhancement technology is used to highlight the *** results show that the mango biological fingerprint anti-counterfeiting method based on Fuzzy C-means clustering has good accuracy and robustness,and effectively reduces the impact of peel color change on anti-counterfeiting identification during mango *** results support that it is feasible to use the lenticels distribution of mango as a biological *** this paper,a computer vision anti-counterfeiting method based on lenticels distribution is proposed.

关键词： computer Fuzzy method

Study of the Red Blood Cells Damage Exposed to Different Dosage of γ-Ray Irradiation

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Study of the Red Blood Cells Damage Exposed to Different Dos...

Research of Perforated Panel Muffler for Twin Screw Air Compressor Applied in Hydrogen Fuel Cell Vehicle

2012年浙江省检验医学学术年会

作者： Deyi Xu Mingxi Peng Zhe zhang Guofei Dong yiqin zhang Hongwei Yu Institute of Transfusion Ningbo Blood Center Ningbo University Key Laboratory of Marine Biotechnology of Ministry of Education

Background:The aims of this research are to study the changes of ultrastructure of erythrocytes,the concentration changes of plasma electrolytes and the killing effect of lymphocytes under different doses ofγ-ray irradiation. Materials and Methods:Blood samples were treated with different doses ofγ-ray irradiation,and then preserved in different *** blood samples were first fixed in phosphate buffered 3%glutaraldehyde for 2 hrs,and 1%osmic acid for 1-2 hrs,then dehydrated in graded alcohol,fixed in tert-butyl alcohol(3:1) and kept at -*** freeze-dried with freeze dryer and covered with gold palladium layer,the samples were analyzed with electron *** for transmission electron microscope analysis were prepared as follows:after fixed in phosphate buffered 3%glutaraldehyde for 2 hrs and 1%osmic acid,the blood samples were embedded with Low Viscosity Embedding Media for 1-2 hrs,dehydrated in graded alcohol,and further dehydrated in graded *** the blood samples were infiltrated by Spurr’ s Kit overnight,embedded in pure Spurr’ s Kit and polymerized at 70 X2 for 8 *** last,ultrathin sections were cut and stained;then erythrocytes were analyzed with transmission electron *** the same time,the changes of concentrations of Na+,K+,CI- and pH values in the plasma as well as the Fas and FasL expression level of lymphocytes pre- and post-irradiation were detected,respectively. Results:The proportions of reversible and irreversible transformations cells,for example,echinocyte, spheroechinocyte,and degenerated shapes cells were increased with increasing irradiation doses and storage period,while the discocyte shape erythrocytes *** the same time,the result showed that the concentration change of K+ was more significant than those of Na+ and Cl- after irradiation in a dosagedependent *** pH was influenced by different doses of radiation and storage *** exposure to 137Csγ-ray,the expressions of Fas and FasL i

关键词： erythrocytes γ-rays irradiation ultrastructure

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Research of Perforated Panel Muffler for Twin Screw Air Comp...

水润滑双螺杆空压机工作过程传热传质特性研究

2020中国汽车工程学会年会暨展览会

作者： Zhou Minglong zhang yiqin Chen Wenqing zhang Zhiping He Zhilong Xing Ziwen Suzhou Academy Xi'an Jiaotong University School of Energy and Power Engineering Xi'an Jiaotong University State Key Laboratory of Air-conditioning Equipment and System Energy Conservation Gree Electric AppliancesINC

Twin screw air compressor will be widely used in hydrogen fuel cell commercial vehicle because of its high efficiency and strong adaptability,but its noise issue isn’t *** purpose of improving the noise of the compressor,the sound field of a perforated panel muffler based on three-dimensional finite element method was firstly *** the impacts of different structure parameters on the performance of muffler were investigate d.A multi-chamber perforated panel muffler with wide frequency bandwidth was *** noise reduction of the muffler was verified through the experimental *** results indicate that the resonant frequency decreases with the decrease of the perforation rate,perforation diameter and the increase of panel *** the perforation rate,suitable perforation diameter and panel thickness are conducive to increasing the sound absorption of resonant *** is a noise reduction about 11.4 dBA in average between the inlet and outlet of the muffler when the rotational speed changes from 9000 rpm to15000 *** the discharge pressure changes from 1.2 bar to 2.0 bar,noise reductions are all above 15 dBA and maximum noise reduction is 23.9 dBA.

关键词： hydrogen fuel cell commercial vehicle twin screw air compressor perforated panel muffler noise

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机械工程学报 2021年第8期57卷 247-254页

作者：王闯张益钦袁恒川邢子文西安交通大学压缩机研究所西安710049

水润滑双螺杆空压机由于能够提供绝对无油的洁净空气而引起了广泛的关注,为研究水润滑双螺杆空压机内部的传热传质特性,建立考虑干空气-水蒸气-液态水三相流动与传热传质的工作过程模型,并采用p-V图试验数据对计算结果进行验证。经对比... 详细信息

水润滑双螺杆空压机由于能够提供绝对无油的洁净空气而引起了广泛的关注,为研究水润滑双螺杆空压机内部的传热传质特性,建立考虑干空气-水蒸气-液态水三相流动与传热传质的工作过程模型,并采用p-V图试验数据对计算结果进行验证。经对比发现,模拟结果和试验结果吻合良好,进而通过该模型,研究三相流体传热传质特性。结果表明,大量的水喷入转子腔仍未实现与湿空气的充分换热,使得湿空气在压缩过程仍有较大温升。而液态水的最大温升也不超过15 K,证明了液态水的蒸发是由于液态水表面与湿空气中水蒸气的密度差驱动的对流传质现象。并且,压缩和排气过程的大部分时间对流传质现象为湿空气中的水蒸气冷凝为液态水。因此,压缩过程中湿空气远未达到饱和状态,且随着压缩过程的进行更接近干空气。

关键词：水润滑双螺杆空压机湿空气传热传质对流

基层社会治理共同体如何提升社会治理效能——基于广西12个县(区)的田野调查分析

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长白学刊 2023年第6期 120-129页

作者：胡佳张一钦广西民族大学政治与公共管理学院广西南宁530006

基层社会治理是国家治理现代化的重要内容。基层社会治理效能提升是一项复杂的系统工程,社会治理共同体建设是基层社会治理体系的核心基础。如何在社会发展中形成有效治理主体以推动社会发展,进而全面提升社会治理效能?社会治理共同体... 详细信息

基层社会治理是国家治理现代化的重要内容。基层社会治理效能提升是一项复杂的系统工程,社会治理共同体建设是基层社会治理体系的核心基础。如何在社会发展中形成有效治理主体以推动社会发展,进而全面提升社会治理效能?社会治理共同体建设与社会治理效能提升的实然逻辑和具体路径有待明确。本文基于社会资本理论和赋能理论,构建以意识赋能、结构赋能、资源赋能形成基础支撑,以搭建互动平台、规范协商议事、完善服务供给构建平衡体系,以激发多元主体活力与提升社会治理效能互动作用的理论分析框架。结合广西6个市12个县(区)的13个万人以上易地扶贫搬迁社区的田野调查分析与多案例调查验证可见,社会治理共同体要通过打造赋能体系、规范协商机制、完善服务供给有效提升社会治理效能,需要以多向授权赋能夯实基础、以多元资源整合承接载体、以多方活力激发强化动力促进社会治理效能持续提升,促进中国社会治理的制度优势转化为社会治理效能。

关键词：基层社会治理共同体社会治理效能运行逻辑

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人血白蛋白防治脑水肿的现状与展望

中华急诊医学杂志 2016年第12期25卷 1219-1222页

作者：江稳强张轶钦曾红科广东省人民医院(广东省医学科学院)急危重症医学部广州510080 南方医科大学广东省人民医院(广东省医学科学院)急危重症医学部广州510515

1临床应用白蛋白防治脑水肿的现状脑水肿、颅内压增高是临床的常见急危重症之一。内科治疗包括脱水剂、利尿剂、过度通气、巴比妥药物等措施，其中渗透性脱水治疗长期以来一直是内科治疗的基石。目前临床上最常用的还是甘露醇，但是随... 详细信息

1临床应用白蛋白防治脑水肿的现状脑水肿、颅内压增高是临床的常见急危重症之一。内科治疗包括脱水剂、利尿剂、过度通气、巴比妥药物等措施，其中渗透性脱水治疗长期以来一直是内科治疗的基石。目前临床上最常用的还是甘露醇，但是随着临床应用的推广，甘露醇的一些不良反应也逐渐显现，包括潜在的肾毒性、心功能不全、脑水肿反跳现象等。

关键词：人血白蛋白脑水肿防治临床应用内科治疗颅内压增高心功能不全急危重症

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白马藏族音乐研究40年:现状及趋势

四川民族学院学报 2019年第6期28卷 30-35页

作者：张益琴陇南师范高等专科学校音乐舞蹈学院

白马藏族是久居藏彝走廊东部边缘,文化空间相对独立的少数民族族群,现今白马人所处地域是我国古代藏缅语民族自北向南迁移的中心地带,其民间现存的各类傩乐舞、圈舞、古歌、酒歌等音乐文化遗产丰富、原始,至今保留着藏彝走廊其他族群或... 详细信息

白马藏族是久居藏彝走廊东部边缘,文化空间相对独立的少数民族族群,现今白马人所处地域是我国古代藏缅语民族自北向南迁移的中心地带,其民间现存的各类傩乐舞、圈舞、古歌、酒歌等音乐文化遗产丰富、原始,至今保留着藏彝走廊其他族群或已消失或未曾有的古老传统,具有非常高的研究价值。20世纪以来,随着学界对白马藏族民间音乐文化研究重视程度不断增加,涌现出众多研究成果,但通过对白马藏族音乐文化研究成果的梳理发现,文化遗产承载者"传承人"的研究尚未真正受到重视。故此,文章提出构建音乐文化传承人"口述史"研究范式将是探寻藏彝走廊独立族群文化渊源的必然趋势。

关键词：白马藏族民间音乐现状研究范式