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中国地质 2018年第6期45卷 1289-1301页

作者：王辉秦绪文范玉海杨金中金谋顺张少鹏廖友运杨晨崔胜贺小龙匡经水郭鹏程中煤航测遥感局煤航地质勘查院陕西西安710054 中国地质调查局北京100037 中国国土资源航空物探遥感中心北京100083

在西昆仑大红柳滩—俘虏沟地区,以WorldView-2高空间分辨率数据为主要信息源,在标准影像图制作基础上,针对性地进行图像增强处理,突出相关控矿要素和矿化信息,开展地质矿产遥感解译;利用ASTER数据开展矿化蚀变有关的遥感异常信息提取,... 详细信息

在西昆仑大红柳滩—俘虏沟地区,以WorldView-2高空间分辨率数据为主要信息源,在标准影像图制作基础上,针对性地进行图像增强处理,突出相关控矿要素和矿化信息,开展地质矿产遥感解译;利用ASTER数据开展矿化蚀变有关的遥感异常信息提取,配合适量的野外调查验证,发现了4种极具找矿前景的矿化带类型:(1)大红柳滩(含稀有金属)花岗伟晶岩带1处;(2)大红柳滩层控型铁多金属矿化带1处;(3)俘虏沟燕山期花岗岩有关热液脉型铁、铅、银、铜矿化区1处;(4)俘虏沟层控型含铜铅锌银的菱铁-赤铁矿矿化带4处;通过遥感综合分析,圈定遥感找矿靶区11处,其中A级遥感找矿靶区5处、B级遥感找矿靶区3处、C级遥感找矿靶区3处,为后续区域地质矿产调查项目规划部署和矿产资源勘查评价提供依据。因此,高分遥感技术在西昆仑地区矿产地质综合调查中作用显著,可实现找矿工作的快速突破,值得在相同或类似区域进一步推广应用。

关键词：高分遥感技术西昆仑大红柳滩-俘虏沟地区地质找矿

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野牡丹科观花植物在广州园林中的应用分析

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热带农业科学 2018年第3期38卷 112-117,F0003页

作者：倪建中张继方何仲坚李许文王伟代色平广州市林业和园林科学研究院/广州市景观建筑重点实验室广东广州510405

对广州市园林绿地种植的野牡丹科观花植物进行种类、应用频率、应用形式和配置情况的调查分析。结果表明,广州市园林绿地中应用的野牡丹科观花植物有11个种类品种,最常见的是巴西野牡丹和角茎野牡丹,应用形式主要为散点植和丛植。存在... 详细信息

对广州市园林绿地种植的野牡丹科观花植物进行种类、应用频率、应用形式和配置情况的调查分析。结果表明,广州市园林绿地中应用的野牡丹科观花植物有11个种类品种,最常见的是巴西野牡丹和角茎野牡丹,应用形式主要为散点植和丛植。存在的问题有应用种类单调、乡土种开发利用少、总体应用频率低、种植数量少等。在调查分析基础上,介绍了几种新优观花种类品种,并提出加强野牡丹科乡土观赏植物的利用、加强选育种和注重养护的建议。

关键词：野牡丹科观花植物园林应用广州

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环二鸟苷酸信号分子抑制剂的研究进展

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生物工程学报 2017年第9期33卷 1466-1477页

作者：向绪稳刘星宇陶辉崔紫宁张炼辉亚热带农业生物资源保护与利用国家重点实验室广东广州510642 华南农业大学农学院群体微生物研究中心广东广州510642 广东省微生物信号与作物病害防控重点实验室广东广州510642

环二鸟苷酸(Bis-(3′-5′)cyclic diguanylic acid,c-di-GMP)是细菌所特有的一类核酸类第二信使,参与并调节细菌多种生理功能,包括细胞分化、生物被膜的形成以及致病因子的产生等。阻断c-di-GMP信号的传导对于发展新型抗菌药物具有重要... 详细信息

环二鸟苷酸(Bis-(3′-5′)cyclic diguanylic acid,c-di-GMP)是细菌所特有的一类核酸类第二信使,参与并调节细菌多种生理功能,包括细胞分化、生物被膜的形成以及致病因子的产生等。阻断c-di-GMP信号的传导对于发展新型抗菌药物具有重要的意义。现有研究结果表明,基于c-di-GMP调控的信号通路开发新型抗菌药物具有3类潜在的靶点,分别是c-di-GMP合成酶(DGCs)、c-di-GMP降解酶(PDEs)以及c-di-GMP受体。文中根据上述3类关键靶点,介绍了相关小分子抑制剂的研究进展,并展望了c-di-GMP信号分子抑制剂的发展方向。

关键词：环二鸟苷酸二乌苷酸环化酶磷酸二酯酶受体抑制剂

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Development of a new characteristic parameter - waveform index of finger blood volume pulse

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Computer Assisted Surgery 2016年第sup1期21卷 6-10页

作者： Wu, Wenjie Yang, Lin zhang, Song Hao, Dongmei Yang, Yimin Li, xuwen Wu, Guanghui zhang, Lei Luo, Zhichang Beijing Univ Technol Coll Life Sci & Bioengn 100 Ping Le Yuan Beijing 100124 Peoples R China Beijing Anzhen Hosp Beijing Peoples R China Beijing Yes Med Devices Co Ltd Beijing Peoples R China

Background: Finger blood volume pulse (F-BVP) contains abundant human cardiovascular system information, including information regarding circulation in the heart, blood vessel function, and the microcirculation system. Pulse waveform analysis is a method for analyzing F-BVP. Methods and results: A new parameter of F-BVP, called waveform index (WI), was extracted, defined, subsequently compared between groups of different cardiovascular function, and compared with age and systolic blood pressure. WI values of the negative and positive groups were 0.209 +/- 0.066 (p<.001) and 0.305 +/- 0.066 (p<.001), respectively. The classification threshold value of WI was 0.24, revealing a sensitivity of 77%, a specificity of 68% and a classification accuracy of 73%. The odds ratio (OR) was 7.164, indicating that subjects with WI > 0.24 had a 7.164 times greater risk of suffering from cardiovascular disease than of not suffering from cardiovascular disease. Age and systolic blood pressure had consistent correlation with WI, in addition, WI had the same trend with age and systolic blood pressure. Conclusion: Because WI of F-BVP was determined according to only F-BVP waveform and increases in age and systolic blood pressure, different values of WI represent different cardiovascular physiological conditions. To a certain extent, the changes of WI reflect the changes of human cardiovascular function. Therefore, WI has the potential to be widely used in disease screening and clinical practice.

关键词： Finger blood volume pulse waveform index cardiovascular function classification threshold value

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Ecosystem responses to anthropogenic and natural forcing over the last 100 years in the coastal areas of the East China Sea

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HOLOCENE 2016年第5期26卷 669-677页

作者： Xing, Lei Zhao, Meixun zhang, Ting Yu, Meng Duan, Shanshan zhang, Rongping Huh, Chih-An Liao, Wen-Hsuan Feng, xuwen Ocean Univ China Key Lab Marine Chem Theory & Technol Minist Educ Qingdao 266100 Peoples R China Qingdao Collaborat Innovat Ctr Marine Sci & Techn Qingdao Peoples R China Acad Sinica Inst Earth Sci Taipei Taiwan Acad Sinica Res Ctr Environm Changes Taipei Taiwan Acad Sinica Earth Syst Sci Taiwan Int Grad Program Taipei Taiwan State Ocean Adm Inst Oceanog 2 Qingdao Peoples R China

Ecosystem changes of the coastal areas of the East China Sea (ECS) during the past 30 years have been characterized by increased productivity and increased occurrences of dinoflagellate red tides;both were commonly attributed to be caused by anthropogenic input of nutrients. However, climate-driven regime shifts were found in the Pacific, but they have not been observed in the ECS owing to the lack of continuous high resolution data. Hence, it is still a challenge to distinguish the influences of anthropogenic activities and climate changes on ECS shelf ecosystem. We compare phytoplankton biomarker (brassicasterol, dinosterol, and alkenones) data of five box cores from the coastal area of the ECS, which afford phytoplankton productivity and community structure records at decadal-scale resolution for the last 100 years. Phytoplankton productivity in all cores increased during the past 50 years, but community structure changes showed different trends. Relative diatom contribution revealed a decreasing trend during the past ca. 50 years in cores DH5-1 and CJ43 collected near the Changjiang Estuary, which were likely caused by increased N/Si and N/P ratios, providing conditions more favorable for dinoflagellates growth. In contrast, the relative diatom contribution increased in cores 32, 34, and DH6-3 further away and south of the Changjiang Estuary, suggesting limited influence of the Changjiang water. Instead, diatom increasing trend is likely caused by increased supply of phosphorus and silicate, as a result of larger Kuroshio intrusion flux and the corresponding strengthened coastal upwelling. Therefore, both anthropogenic activities and climate-driven coastal upwelling have contributed to increased productivities, but these two forcing mechanisms have resulted in contrasting community structure changes at different sites in the coastal area of the ECS.

关键词： biomarkers Changjiang River coastal upwelling Kuroshio phytoplankton community structure the East China Sea

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A 0.5mW 1Mb/s multi-channel chirp-UWB transmitter with burst-mode transmission and optimized digital gradient

A 0.5mW 1Mb/s multi-channel chirp-UWB transmitter with burst...

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2016 IEEE MTT-S International Wireless Symposium, IWS 2016

作者： Ni, xuwen zhang, Yining Rhee, Woogeun Jia, Wen Wang, Zhihua Institute of Microelectronics Tsinghua University Beijing China Research Institute of Tsinghua University in Shenzhen China

ISBN: (纸本)9781509006960

This paper presents a low power multi-channel chirp-UWB (C-UWB) transmitter for short range communication systems. The C-UWB transmitter generates a wideband FM signal with a steep spectral roll-off, while enabling a duty-cycled operation. To achieve an optimum duty-cycle control, burst-mode transmission and steep digital gradient generation techniques are employed. A 5-to-9GHz C-UWB transmitter is implemented in 65nm CMOS for multi-channel operation with a channel bandwidth of 500MHz. The transmitter achieves 1Mb/s data rate, consuming 0.5mW from a 1V supply. © 2016 IEEE.

关键词： Transmitters

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Biological Functional Analysis of Chinese Herbal Medicines Against wind-cold-dampness Syndrome 12

Biological Functional Analysis of Chinese Herbal Medicines A...

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12th International Conference on Natural Computation, Fuzzy Systems and Knowledge Discovery (ICNC-FSKD)

作者： Zheng, Guang zhang, Yanjing zhang, He Li, Miaofeng He, xuwen Qi, Yutao Zhan, Junping Guo, Hongtao Lanzhou Univ Sch Informat Sci & Engn Lanzhou 730000 Peoples R China Henan Univ TCM Affiliated Hosp 2 Zhengzhou 450002 Peoples R China Henan Univ TCM Affiliated Hosp 1 Zhengzhou 450000 Peoples R China

ISBN: (纸本)9781509040933

Syndrome wind-cold-dampness in traditional Chinese medicine (TCM) can be referred to diseases of osteoarthritis, rheumatoid arthritis, cervical spondylitis, and spondylitis and so on. Over thousand years TCM clinical explorations, this syndrome can be treated with a group of herbal medicines in TCM. However, their molecular level biological functions are still not clear. In this study, a set of algorithms e.g., hypergeometric distribution, Jaccard index, and recursive programming for hierarchy network were deployed in the context gene/protein functional similarity and enrichment analysis. The analysis was mainly focused on the associated herbal medicines, their chemical compounds, target proteins' similarity, and gene ontology terms' hierarchical network overrepresentation through the enrichment analysis of hypergeometric distribution with P-value set to 0.05. As a result, these associated herbs share low level (<0.5) of therapeutic similarities on target proteins, yet with common biological functions for TCM syndrome wind-cold-dampness e.g., signal transduction, transportation, chemical homeostatic and metabolic process.

关键词： bioinformatics wind-cold-dampness Chinese herbal medicine biological function hypergeometric distribution

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Using Intrinsic Intracrystalline Tunnels for Near-Infrared and Visible-Light Selective Electrochromic Modulation

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ADVANCED OPTICAL MATERIALS 2017年第11期5卷

作者： Wang, Zhen zhang, Qingzhu Cong, Shan Chen, Zhigang Zhao, Jinxiong Yang, Mei Zheng, Zuhui Zeng, Sha Yang, xuwen Geng, Fengxia Zhao, Zhigang Univ Sci & Technol China Sch Nanotechnol & Nanobion Hefei 230000 Peoples R China Chinese Acad Sci Suzhou Inst Nanotech & Nanobion Key Lab Nanodevices & Applicat Suzhou 215123 Peoples R China Soochow Univ Coll Chem Chem Engn & Mat Sci Suzhou 215123 Peoples R China

Dual-band electrochromic composite materials are of utmost importance in advancing the electrochromic field toward achieving the ideal smart window with independent control over visible and near-infrared (NIR) radiation. However, such composites usually need deliberate architecting of their mesoscale structure (e.g., via block copolymer-templating method) to make the electrolyte contact with both NIR and visible-light modulating components. Herein, instead of arduously making exterior pores, the intrinsic structural tunnels are utilized directly in electrochromic materials to facilitate the accommodation and transportation of insertion ions, which permit the infiltration of the electrolyte to be in contact with both visible (Prussian blue) and NIR-light modulating components (nonstoichiometric tungsten oxide). Such simple-fabricated composite materials exhibit excellent dual-band electrochromic performance with an unprecedented dynamic optical range for modulation of visible and NIR light, up to 71.2% at 633 nm and 64.8% at 1600 nm, respectively.

关键词： electrochromic modulation intracrystalline tunnels NIR and visible-light modulation

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Comparison of electrohysterogram signal measured by surface electrodes with different designs: A computational study with dipole band and abdomen models

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SCIENTIFIC REPORTS 2017年第1期7卷 17282-17282页

作者： Gao, Pei Hao, Dongmei An, Yang Wang, Ying Qiu, Qian Yang, Lin Yang, Yimin zhang, Song Li, xuwen Zheng, Dingchang Beijing Univ Technol Coll Life Sci & Bioengn Beijing 100124 Peoples R China Anglia Ruskin Univ Hlth & Wellbeing Acad Fac Med Sci Chelmsford CM1 1SQ Essex England

Non-invasive measurement of uterine activity using electrohysterogram (EHG) surface electrodes has been attempted to monitor uterine contraction. This study aimed to computationally compare the performance of acquiring EHG signals using monopolar electrode and three types of Laplacian concentric ring electrodes (bipolar, quasi-bipolar and tri-polar). With the implementation of dipole band model and abdomen model, the performances of four electrodes in terms of the local sensitivity were quantified by potential attenuation. Furthermore, the effects of fat and muscle thickness on potential attenuation were evaluated using the bipolar and tri-polar electrodes with different radius. The results showed that all the four types of electrodes detected the simulated EHG signals with consistency. That the bipolar and tri-polar electrodes had greater attenuations than the others, and the shorter distance between the origin and location of dipole band at 20 dB attenuation, indicating that they had relatively better local sensitivity. In addition, ANOVA analysis showed that, for all the electrodes with different outer ring radius, the effects of fat and muscle on potential attenuation were significant (all p < 0.01). It is therefore concluded that the bipolar and tri-polar electrodes had higher local sensitivity than the others, indicating that they can be applied to detect EHG effectively.

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LXA1000螺旋分选机在山西潞安余吾矿选煤厂的应用

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选煤技术 2018年第6期46卷 70-74页

作者：张嘉云杜军王亚健孙玉伟张鹏飞公绪文王治帅山西潞安集团余吾煤业有限责任公司山西长治046204 威海市海王旋流器有限公司山东威海264203

阐述了螺旋分选机的分选原理及特点,介绍了LXA1000型螺旋分选机的优点及在山西潞安集团余吾矿选煤厂的应用。生产实践表明,螺旋分选机的精煤产率为82. 59%,不完善度为0. 18,分选数量效率为97. 5%,粗煤泥经螺旋分选机的分选效果良好,经... 详细信息

阐述了螺旋分选机的分选原理及特点,介绍了LXA1000型螺旋分选机的优点及在山西潞安集团余吾矿选煤厂的应用。生产实践表明,螺旋分选机的精煤产率为82. 59%,不完善度为0. 18,分选数量效率为97. 5%,粗煤泥经螺旋分选机的分选效果良好,经济效益可观。

关键词：粗煤泥分选螺旋分选机精煤产率不完善度数量效率

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