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FY-4A资料在2023年7月1日宁安极端冰雹天气过程中的应用分析

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黑龙江气象 2024年第3期41卷 9-12,33页

作者：白玉兰刘刚周鑫刘冠鹏杨丹鹤岗市气象局黑龙江鹤岗154107 黑龙江省气象台黑龙江哈尔滨150030 牡丹江市气象局黑龙江牡丹江157000

在冷涡背景下,2023年7月1日牡丹江宁安出现最大直径达9 cm左右冰雹、10级大风等强对流天气。利用MICAPS资料、雷达资料、FY-4A资料,选取FY-4A卫星云类型CLT、云相态CLP、云顶高度CTH和云顶温度CTT等4类产品进行可用性分析。结果表明:(1)... 详细信息

在冷涡背景下,2023年7月1日牡丹江宁安出现最大直径达9 cm左右冰雹、10级大风等强对流天气。利用MICAPS资料、雷达资料、FY-4A资料,选取FY-4A卫星云类型CLT、云相态CLP、云顶高度CTH和云顶温度CTT等4类产品进行可用性分析。结果表明:(1)FY-4A数据接收率、时间分辨率和数据接收及时性,可以支持实际预报中实时监测预警业务;(2)4类产品在此次天气过程中有不同的表现,其中CLT、CLP具有较好的可用性,可以较好的判断云的类别;CTH和CTT两种产品与极端冰雹天气的对应关系较为明显,但不是出现极端冰雹天气的必要条件;(3)FY-4A短波红外通道1.58~1.64μm,尤其是2.1~2.35μm在较强对流天气发生前的0~1 h内,对大粒子冰晶云团识别具有一定的指示作用,对提高短临预警实效具有一定的指示意义。

关键词： FY-4A卫星极端冰雹大粒子卫星产品

反复呼吸道感染儿童的维生素D营养状况、影响因素及干预策略

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中国现代药物应用 2024年第17期18卷 57-60页

作者：赖志文刘观发肖毅于都县第二人民医院 342300

目的分析反复呼吸道感染(RRTIs)儿童的维生素D(VitD)营养状况、影响因素及干预策略。方法选取82例RRTIs患儿作为研究对象,采用荧光免疫竞争法定量测定VitD水平,将VitD充足{25-羟维生素D[25-(OH) D] 50~250 nmol/L}的患儿归为VitD正常... 详细信息

目的分析反复呼吸道感染(RRTIs)儿童的维生素D(VitD)营养状况、影响因素及干预策略。方法选取82例RRTIs患儿作为研究对象,采用荧光免疫竞争法定量测定VitD水平,将VitD充足{25-羟维生素D[25-(OH) D] 50~250 nmol/L}的患儿归为VitD正常组(n=44),VitD不足及缺乏[25-(OH)D0.05)。Logistic多因素回归分析显示,母亲文化程度初中及以下、母乳喂养、厌食、深海鱼类摄入<1次/周、贫血和鱼肝油服用不规律是RRTIs儿童VitD缺乏的危险因素(P<0.05)。结论 RRTIs儿童的VitD属于不足水平,母亲文化程度初中及以下、母乳喂养、厌食、深海鱼类摄入<1次/周、贫血和鱼肝油服用不规律是RRTIs儿童VitD缺乏的危险因素,应加强儿童保健的科普教育,降低RRTIs儿童VitD缺乏的发生率。

关键词：反复呼吸道感染维生素D 营养状况影响因素干预策略

Crowd-Guided Entity Matching with Consolidated Textual Data

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Journal of Computer Science & Technology 2017年第5期32卷 858-876页

作者： Zhi-Xu Li Qiang Yang An liu guan-Feng liu Jia Zhu Jia-Jie Xu Kai Zheng Min Zhang School of Computer Science and Technology Soochow University Suzhou 215006 China guangdong Key Laboratory of Big Data Analysis and Processing Guangzhou 510006 China School of Computer Science and Technology Soochow University Suzhou 215006 China School of Computer South China Normal University Guangzhou 510631 China School of Computer Science and Technology Soochow University Suzhou 215006 China Beijing Key Laboratory of Big Data Management and Analysis Methods Beijing 100872 China

Entity matching (EM) identifies records referring to the same entity within or across databases. Existing methods using structured attribute values (such as digital, date or short string values) may fail when the structured information is not enough to reflect the matching relationships between records. Nowadays more and more databases may have some unstructured textual attribute containing extra consolidated textual information (CText) of the record, but seldom work has been done on using the CText for EM. Conventional string similarity metrics such as edit distance or bag-of-words are unsuitable for measuring the similarities between CText since there are hundreds or thousands of words with each piece of CText, while existing topic models either cannot work well since there are no obvious gaps between topics in CText. In this paper, we propose a novel cooccurrence-based topic model to identify various sub-topics from each piece of CText, and then measure the similarity between CText on the multiple sub-topic dimensions. To avoid ignoring some hidden important sub-topics, we let the crowd help us decide weights of different sub-topics in doing EM. Our empirical study on two real-world datasets based on Amzon Mechanical Turk Crowdsourcing Platform shows that our method outperforms the state-of-the-art EM methods and Text Understanding models.

关键词： entity matching consolidated textual data crowdsourcing

Phase formation and crystallization of LiMn_(x)Fe_(1-x)PO_(4)-C olivine material with different Mn^(2+)contents fabricated at lower calcination temperatures

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Rare Metals 2022年第9期41卷 3142-3149页

作者： guan-Wei liu Xiang-Jun Zhang Song Gong Dan-Ping Jiang Bing-Xue liu Rong Yang Shi-Gang Lu R&D center for energy storage and vehicle batteries General Research Institute for Nonferrous MetalsBeijing100088China

LiMn_(x)Fe_(1-x)PO_(4)-C cathode materials for lithium ion batteries were synthesized via solid-state method using Li_(2)CO_(3),MnCO_(3),NH_(4)H_(2)PO_(4),FePO_(4) and sucrose as starting raw materials,followed by high-temperature reduction-annealing.A series of calcination experiments at different temperatures reveal that Mn^(2+)-containing materials exhibit a lower temperature for olivine phase formation,for example LiMn_(0.5)Fe_(0.5)PO_(4) olivine phase forms at 275℃,while manganese-free crystalline LiFePO_(4) generally forms at the required temperature of 350℃.Increasing Mn^(2+) content is found to enhance crystallization degree of LiMn_(x)Fe_(1-x)PO_(4) material prepared at lower calcination temperatures.X-ray photoelectron spectroscopy(XPS)results confirm that Mn valence state(+2)remains unchanged up to~250℃ when calcined in ambient *** above-mentioned beneficial effect of manganese on phase formation and crystallization of olivine can be well attributed to the stable nature of Mn^(2+)and its strong propensity to form olivine phases.

关键词： Energy storage materials Solid-state reactions Phase transitions

一种复合型生物消毒液抗菌活性及其安全性研究

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中国消毒学杂志 2024年第3期41卷 161-164页

作者：刘冠严敏杜锡林邵中军中国人民解放军空军军医大学第二附属医院陕西西安710000

目的观察一种以抗菌肽(AMP)和聚六亚甲基双胍(PHMB)为主要成分的复合型生物消毒液抗菌活性及其安全性。方法采用悬液定量杀菌试验和动物试验方法,对某复合型生物消毒液抗菌活性及其安全性进行观察。结果该复合生物消毒液原液对悬液... 详细信息

目的观察一种以抗菌肽(AMP)和聚六亚甲基双胍(PHMB)为主要成分的复合型生物消毒液抗菌活性及其安全性。方法采用悬液定量杀菌试验和动物试验方法,对某复合型生物消毒液抗菌活性及其安全性进行观察。结果该复合生物消毒液原液对悬液内的指示菌分别作用1 min,对金黄色葡萄球菌、大肠埃希菌和铜绿假单胞菌的平均杀灭对数值均>5.0,对白念珠菌的平均杀灭对数值>4.0。该复合消毒液对小鼠LD50值>5 000 mg/(kg·bw),属实际无毒级;其原液对家兔完整皮肤和黏膜均无刺激性。结论该复合型生物消毒液具有良好的杀菌效果和生物安全性。

关键词：抗菌肽聚六亚甲基双胍生物消毒液杀菌效果皮肤消毒

Optimization of horizontal well staggered patterns

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Petroleum Science 2008年第4期5卷 348-352页

作者： Zhao Chunsen Li Peijing guan Dan liu Qingjuan Department of Petroleum Engineering Daqing Petroleum Institute Daqing Heilongjiang 163318 China

Staggered line-drive patterns are widely used in oilfields. In this paper, to optimize a staggered pattern of horizontal wells, a 3D problem was divided into two 2D （x-y plane andy-z plane） problems with the pseudo-3D method, conformal transformation and superposition principle. A productivity equation for a horizontal well was deduced, which can be used to optimize the well pattern. A relationship between the length of horizontal wells and the shape factor of well patterns was established. The result shows that optimized well patterns can improve oil production from horizontal wells. This provides a theoretical basis for horizontal well applications to the development of oilfields, especially for overall development of oilfields by horizontal wells.

关键词： Horizontal well productivity calculation optimization of well pattern

Large solar energetic particle event that occurred on 2012 March 7 and its VDA analysis

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Research in Astronomy and Astrophysics 2016年第8期16卷 33-42页

作者： liu-guan Ding Xin-Xin Cao Zhi-Wei Wang Gui-Ming Le School of Physics and Optoelectronic Engineering Institute of Space WeatherNanjing University of Information Science and Technology National Center for Space Weather China Meteorological Administration

On 2012 March 7, the STEREO Ahead and Behind spacecraft, along with near-Earth spacecraft （e.g. SOHO, Wind） situated between the two STEREO spacecraft, observed an extremely large global solar energetic particle （SEP） event in Solar Cycle 24. Two successive coronal mass ejections （CMEs） have been detected close in time. From the multi-point in-situ observations, it can be found that this SEP event was caused by the first CME, but the second one was not involved. Using velocity dispersion analysis （VDA）, we find that for a well magnetically connected point, the energetic protons and electrons are released nearly at the same time. The path lengths to STEREO-B （STB） for protons and electrons have a distinct difference and deviate remarkably from the nominal Parker spiral path length, which is likely due to the presence of interplanetary magnetic structures situated between the source and STB. Also, the VDA method seems to only obtain reasonable results at well-connected locations and the inferred release times of energetic particles in different energy channels are similar. We suggest that good-connection is crucial for obtaining both an accurate release time and path length simultaneously, agreeing with the modeling result of Wang ＆ Qin （2015）.

关键词： Sun particle emission -- Sun coronal mass ejection (CME) -- method velocity dispersionanalysis (VDA)

MISSING DIAGNOSIS OF NECK METASTASES BY ROUTINE DETECTING METHOD IN LARYNGEAL CARCINOMAS

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Chinese Medical Sciences Journal 2006年第1期21卷 24-26页

作者： Chao guan Bin liu Wen-yue Ji Department of Otorhinolaryngology the First Affiliated Hospital China Medical University Shenyang 110001

Objective To evaluate the missing diagnosis of neck metastases by routine detecting method (palpation combined with one pathological slide) in laryngeal *** Sixty-six specimens of neck dissections were collected and observed by routine method, transparent method, and continuous sliding *** Totally, 1153 lymph nodes were detected by palpation method and another 1204 lymph nodes were detected by transparent *** lymph nodes detected by transparent method account for 51.1% of the total, and among them 10 metastases were found, which account for 15.6%(10/64) of metastatic lymph *** those with no metastasis detected by routine method, 50 μm interval continuous sliding method was performed, and 14 tiny metastases were found, which account for 21.9%(14/64) of metastatic lymph *** by routine method, most lymph nodes (95%) were in tumor growth and tumor suffusion *** missing diagnosis rate of routine method was 37.5%(24/64).Conclusions When routine method was used to detect lymph nodes in neck specimens, missing diagnosis should be considered to select best *** transparent method small lymph nodes could be found and it is a valuable method to observe pathological changes of small *** sliding method could find micrometastasis precisely, but the work burden is heavy and it is difficult to be widely used.

关键词： laryngeal carcinomas lymph node metastases

W-band millimeter wave vialess microstrip-to-microstrip vertical transition in multilayer LCP substrate

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The Journal of China Universities of Posts and Telecommunications 2024年第3期31卷 87-94页

作者： liu Weihong Zhang Xu guan Dongyang School of Electronic Engineering Xian University of Posts and TelecommunicationsXi'an 710121China

In this paper,a W-band broadband vialess microstrip(MS)-to-MS vertical transition in multilayer liquid crystal polymer(LCP)substrate is presented,which consists of two MS lines in the top layer,a common ground plane and slotline resonators in the second layer,and a close-loop transmission-line in the third *** increase the passband of the vialess vertical transition,an H-shaped slotline resonator is introduced,which greatly improves the impedance performance of the slotline resonator,and the full-wave simulated results indicate that insertion loss(IL)is less than 2 dB and return loss(RL)is better than 10 dB at *** verify this design,the broadband vertical transition is fabricated and *** measured results indicate that a broadband vertical transition with RL better than 10 dB and IL less than 5.67 dB can be obtained in the frequency range from 70.00 GHz to 104.09 *** to the fabrication error in the preparation process,the measured results are deteriorated compared to the simulated results,and the investigation indicates that the deviation is caused by the thickness error of the LCP substrate.

关键词： W-band broadband microstrip(MS)-to-MS vialess vertical transition liquid crystal polymer(LCP)