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Hierarchy structure characteristics analysis for the China Loess watersheds based on gully node calibration

Journal of Mountain Science 2018年第12期15卷 2637-2650页

作者： Hai-ying ZHAO Yi-peng XU yue-xue LIU Hai-ying College of Geomatics Shandong University of Science and TechnologyQingdao 266590China College of Computer Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

A land surface region can be decomposed into a series of watershed units with a hierarchical organizational structure. For loess landform, the watershed is a basic spatial–structural unit that can express natural landforms, surface morphology characteristics, spatial organization and developmental evolution. In this research we adopted the concept of node calibration in the watershed structure unit, selected six complete watersheds on China Loess Plateau as the research areas to study the quantitative characteristics of the hierarchical structure in terms of watershed geomorphology based on digital elevation model(DEM) data, and then built a watershed hierarchical structure model that relies on gully structure feature points. We calculated the quantitative indices, such as elevation, flow accumulation and hypsometric integral and found there are remarkably closer linear correlation between flow accumulation and elevation with increasing gully order, and the same variation tendency of hypsometric integral also presented. The results showed that the characteristics of spatial structure become more stable, and the intensity of spatial aggregation gradually enhances with increasing gully order. In summary, from the view of gully node calibration, the China Loess watershed structure shows more significantly complex, and the developmental situation variation of the loess landforms also exhibited a fairly stable status with gully order increasing. So, the loess watershed structure and its changes constructed the complex system of the loess landform, and it has the great significance for studying the spatial pattern and evolution law of the watershed geomorphology.

关键词： Digital elevation models Flow accumulation Gully structure feature point Hypsometric integral Loess landform Node calibration

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Hierarchical pattern recognition of landform elements considering scale adaptation

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Journal of Mountain Science 2023年第7期20卷 2003-2014页

作者： XU yue-xue ZHU Hong-chun LI Jin-yu ZHANG Sheng-jia College of Geodesy and Geomatics Shandong University of Science and TechnologyQingdao 266590China

Landform elements with varying morphologies and spatial arrangements are recognized as feature indicator of landform classification and play a critical role in geomorphological *** geometry method has been extensively applied in prior landform element research,while its efficacy in differentiating similar morphological characteristics remains inadequate to *** reduce reliance on geomorphometric variables and increase awareness of landform patterns,geomorphons method was generated in previous study corresponding to specific landform reclassification map based on lookup ***,to address the problem of feature similarity,hierarchical classification was proposed and effectively utilized for terrain recognition through the analytical strategy of fuzzy gradient ***,combining the advantages of these two aspects,a hierarchical framework was proposed in this study for landform element pattern recognition considering the morphology and hierarchy ***,the local triplet patterns derived from geomorphons were enhanced by setting the flatness threshold,and subsequently adopted for the primary landform element ***,as geomorphic units with the same morphology possess different spatial analytical scales,the unidentified landform elements under the principle of scale adaptation were determined by calculating the spatial correlation and entropy *** ensure the effectiveness of this proposed method,the sampling points were randomly selected from NASADEM data and then validated against a real 3D terrain *** results of landform element pattern recognition demonstrate that our approach can reach above 77%average ***,it delineates local details more effectively than geomorphons in visual assessment,resulting in a 7%accuracy improvement in overall scale.

关键词： DEM Landform elements Hierarchical classification Scale adaptation Pattern recognition

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High-Performance Humidity Sensors Based on Double-Layer ZnO-TiO_(2) Nanofibers via Electrospinning

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Chinese Physics Letters 2011年第9期28卷 69-72页

作者： yue xue-Jun HONG Tian-Sheng XU Xing LI Zhen Key Laboratory of Key Technology on Agricultural Machine and Equipment(Ministry of Education) College of EngineeringSouth China Agricultural UniversityGuangzhou 510642

ZnO and TiO_(2) nanofibers are synthesized via electrospinning methods and characterized by x−ray diffraction,scanning electron microscopy,and transmission electron *** sensors with double-layer sensing films are fabricated by spinning the ZnO and TiO_(2) nanofibers on ceramic substrates *** with sensors loading only one type of nanofiber,the double-layer sensors exhibit much better sensing *** corresponding impedance changes more than four orders of magnitude within the whole humidity range from 11%to 95%relative humidity,and the response and recovery times are about 11 and 7 s,*** hysteresis is around 1.5%RH,and excellent stability is also observed after 180 *** humidity sensing mechanism is discussed in terms of the sensor *** experimental results provide a possible route for the design and fabrication of high performance humidity sensors based on one-dimensional nanomaterials.

关键词： materials fibers spinning

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甘薯杂粮粉品质特征与主要理化性质的Mantel test分析

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粮食与油脂 2024年第9期37卷 31-34,40页

作者：穆晶晶周翔母浩圆章敖波岳瑞雪徐州工程学院食品与生物工程学院江苏徐州221116 江苏徐州甘薯研究中心/江苏徐淮地区徐州农业科学研究所江苏徐州221131

以不同品种甘薯全粉为原料,复配黄豆粉、芝麻粉制备甘薯杂粮粉,并测定其β-胡萝卜素、玉米黄质、槲皮素含量,利用曼特尔检验(Mantel test)方法探讨这3种天然成分含量与其理化指标之间的相关性,研究甘薯品种对甘薯杂粮粉品质的影响。结... 详细信息

以不同品种甘薯全粉为原料,复配黄豆粉、芝麻粉制备甘薯杂粮粉,并测定其β-胡萝卜素、玉米黄质、槲皮素含量,利用曼特尔检验(Mantel test)方法探讨这3种天然成分含量与其理化指标之间的相关性,研究甘薯品种对甘薯杂粮粉品质的影响。结果表明:甘薯杂粮粉的抗氧化能力与β-胡萝卜素含量呈强正相关(r=0.80),与玉米黄质含量(r=0.26)和槲皮素含量(r=-0.14)呈现弱相关性。甘薯杂粮粉的干物质含量与β-胡萝卜素含量呈负相关(r=-0.72),与玉米黄质含量(r=0.91)和槲皮素含量(r=1.00)呈强正相关。总体表明β-胡萝卜素是甘薯杂粮粉中有效的抗氧化成分。

关键词：甘薯杂粮粉工艺优化理化性质曼特尔检验

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早期肠内营养干预对脓毒症休克患者免疫平衡及预后的影响

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岭南急诊医学杂志 2024年第4期29卷 325-327,332页

作者：董海花岳俊学吴建锋河南省济源市人民医院急诊科 459003

目的:总结早期肠内营养(EEN)干预对脓毒症休克患者免疫平衡和预后的影响。方法:选取2018年10月-2023年10月济源市人民医院收治的82例脓毒症休克患者为研究对象,根据其肠内营养(EN)干预方案分为EEN组(n=39)和晚期肠内营养(DEN)组(n=43),... 详细信息

目的:总结早期肠内营养(EEN)干预对脓毒症休克患者免疫平衡和预后的影响。方法:选取2018年10月-2023年10月济源市人民医院收治的82例脓毒症休克患者为研究对象,根据其肠内营养(EN)干预方案分为EEN组(n=39)和晚期肠内营养(DEN)组(n=43),EEN组于入院24 h内予以EN,DEN组于入院48 h后予以EN,比较两组干预前后血清营养指标、免疫平衡指标、炎性因子变化和干预期间不良反应、入住ICU时间、干预前后急性生理与慢性健康(APACHEⅡ)评分、贯序器官功能衰竭(SOFA)评分。结果:干预7 d后,相较于DEN组,EEN组血清总蛋白(TP)、清蛋白(Alb)、前清蛋白(PA)水平更高,Treg/Th17、血清C反应蛋白(CRP)、白细胞介素(IL)-6水平、APACHEⅡ、SOFA评分更低(P<0.05);EEN组代谢紊乱发生率明显低于DEN组、EEN组入住ICU时间明显短于DEN组(P<0.05)。结论:EN干预可有效改善脓毒症休克患者的营养状态和免疫平衡,而EEN的效果更甚,可能对疾病恢复具有积极推进作用。

关键词：脓毒症休克肠内营养免疫平衡预后

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俄罗斯燃料和能源综合体国家标准化现状及其发展趋势预测

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中国标准化 2024年第1期 227-231页

作者：齐俊杰马慧如岳丽雪黑龙江省标准化研究院黑龙江省第五地质勘查院

能源合作是中俄务实合作的重要基石,也是维护全球能源安全的积极力量。在世纪疫情与俄乌战争、巴以冲突等国家和地区间不稳定因素叠加的背景下,加强中俄能源标准化合作,有利于疏通两国能源贸易合作节点,维护全球能源安全与稳定,推动绿... 详细信息

能源合作是中俄务实合作的重要基石,也是维护全球能源安全的积极力量。在世纪疫情与俄乌战争、巴以冲突等国家和地区间不稳定因素叠加的背景下,加强中俄能源标准化合作,有利于疏通两国能源贸易合作节点,维护全球能源安全与稳定,推动绿色低碳可持续发展。本文从国家标准化监管机构发展现状、国家标准化规范性文件制定现状两个角度对俄罗斯燃料和能源综合体国家标准化发展现状进行了梳理,并结合了俄乌战争背景,分析了俄罗斯燃料和能源综合体国家标准化发展趋势,以期为中俄能源标准化合作提供一些参考。

关键词：燃料和能源综合体国家标准化发展现状燃料和能源综合体国家标准化发展趋势中俄能源标准化合作

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Improving Land Resource Evaluation Using Fuzzy Neural Network Ensembles

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Pedosphere 2007年第4期17卷 429-435页

作者： xue yue-Ju HU yue-Ming LIU Shu-Guang YANG Jing-Feng CHEN Qi-Chang BAO Shi-Tai College of Engineering South China Agricultural University Guangzhou 510642 （China）. College of Information South China Agricultural University Guangzhou 510642 （China） U.S. Geological Survey （USGS） Center for Earth Resources Observation and Science （EROS） Sioux Falls South Dakota 57198 （USA）

Land evaluation factors often contain continuous-, discrete- and nominal-valued attributes. In traditional land evaluation, these different attributes are usually graded into categorical indexes by land resource experts, and the evaluation results rely heavily on experts＇ experiences. In order to overcome the shortcoming, we presented a fuzzy neural network ensemble method that did not require grading the evaluation factors into categorical indexes and could evaluate land resources by using the three kinds of attribute values directly. A fuzzy back propagation neural network （BPNN）, a fuzzy radial basis function neural network （RBFNN）, a fuzzy BPNN ensemble, and a fuzzy RBFNN ensemble were used to evaluate the land resources in Guangdong Province. The evaluation results by using the fuzzy BPNN ensemble and the fuzzy RBFNN ensemble were much better than those by using the single fuzzy BPNN and the single fuzzy RBFNN, and the error rate of the single fuzzy RBFNN or fuzzy RBFNN ensemble was lower than that of the single fuzzy BPNN or fuzzy BPNN ensemble, respectively. By using the fuzzy neural network ensembles, the validity of land resource evaluation was improved and reliance on land evaluators＇ experiences was considerably reduced.

关键词： back propagation neural network (BPNN) data types fuzzy neural network ensembles land resource evaluation radial basis function neural network (RBFNN)

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艾AP2/ERF基因家族鉴定及表达模式分析

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药学学报 2024年第9期59卷 2634-2647页

作者：岳雪雪肖闯张倩雯彭赛男陈昌婕周佳李金鑫李宇琨苗玉焕刘大会湖北中医药大学药学院湖北武汉430065 湖北时珍实验室湖北武汉430065

艾***.为我国传统中药,以叶入药,主要含黄酮类、酚酸、挥发油等多种化合物,具有多种药理活性。AP2/ERF转录因子在植物中数量较多,主要参与植物的生长发育、非生物胁迫响应及次生代谢物合成调控,但艾AP2/ERF基因家族的研究及其功能鲜有... 详细信息

艾***.为我国传统中药,以叶入药,主要含黄酮类、酚酸、挥发油等多种化合物,具有多种药理活性。AP2/ERF转录因子在植物中数量较多,主要参与植物的生长发育、非生物胁迫响应及次生代谢物合成调控,但艾AP2/ERF基因家族的研究及其功能鲜有报道。本研究系统鉴定了艾AP2/ERF基因家族,分析其系统进化树、蛋白理化性质、亚细胞定位、保守基序和启动子作用元件、茉莉酸甲酯诱导表达模式及不同组织表达模式。结果表明,艾基因组中共含有204个AP2/ERF转录因子,其编码的蛋白质由88~483个氨基酸组成,相对分子质量为10~52.94kDa,理论等电点为4.62~9.88。亚细胞预测显示,绝大部分AP2/ERF位于细胞核、细胞质而少部分位于细胞膜和叶绿体。根据拟南芥AP2/ERF家族分类,艾AP2/ERF蛋白分为Soloist、AP2、ERF(B3、B4、B5、B6)及DREB(A1、A2、A4、A5、A6)四个亚家族,其中DREB家族所占比例最大,同一亚家族具有相似的保守基序。顺式作用元件分析表明,AP2/ERF启动子上具有大量响应光和非生物胁迫的元件。表达模式分析显示,AP2/ERF家族大部分基因主要在根和茎中优势表达,其中19个在叶片中优势表达,77个会受到茉莉酸甲酯诱导表达,其中既在叶片中优势表达又受到茉莉酸甲酯诱导表达的基因有16个,这些AP2/ERF基因可能是艾叶中有效成分合成的关键调控基因。该研究为艾AP2/ERF家族基因的功能研究及其在艾叶活性成分合成中的积累调控作用奠定了基础。

关键词：艾有效成分 AP2/ERF转录因子生物信息学表达模式

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Chemistry and Process Optimization of V-Microalloyed N80-Class Seamless Casing Tube

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Journal of Iron and Steel Research International 2010年第3期17卷 72-78页

作者： PAN Tao YANG Cai-fu MA yue xue Dong-mei ZHANG Yong-quan Division for Structural Materials Central Iron and Steel Research Institute Beijing 100081 China

The complex effects of different nitrogen （N） contents and thermal routines on the microstructure and mechanical properties of 33Mn2V steels for N80-Class seamless casing tube application were investigated using Gleeble simulation technique. The results showed that the N additions of 0. 014 %- 0. 021 % in the steels for the in-line normalization process （ILNP） increased the strength while the toughngss remained at a high level as compared with the steel with N content of 0. 005 %. It was also revealed that the N addition of 0. 021%could enhance the performance combination of strength and toughness in the steels by using 700 ℃ as the cooling interrupted temperature （CIT） for the non in-line normalizing process （NILNP）. It was further evidenced that the toughness was improved at expense of strength to some degree in all the steels by decreasing reheating temperature for the ILNP, while an increase of CIT for NILNP severely impaired the toughness and slightly improve the strength in the high-N steel with N content of 0. 021%. This can be attributed to the dissolution and precipitation behavior of V（C,N）. The optimization of V （C,N） precipitation could be achieved by enhancing N. The precipitation of V（C, N） in austenite was promoted by cooling to a certain temperature lower than the A,1 for the ILNP. The V（C,N） particles formed in austenite contrib- uted to grain refinement by the VN-induced nucleation of intragranular ferrite, but as a result the effect of precipitation on strengthening would become weaker due to a decrease of the precipitation of V in ferrite.

关键词： seamless tube in-line normalizing V-N microalloying reheating mechanical properties Gleeble simulation

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Prevalence of high-risk human papillomavirus infection in different cervical lesion among organized health-examination women in Shanghai, China

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Chinese Medical Journal 2008年第16期121卷 1578-1582页

作者： ZHANG Wen-ying xue yue-zhen CHEN Min HAN Ling LUO Man Department of Obstetrics and Gynecology Sixth People's Hospital Shanghai Jiao Tong University Shanghai 200233 China Department of Gynecology Obstetrics and Gynecology Hospital Fudan University Shanghai 200011 China

Background Cervical cancer is the second most common cause of death from cancer among women worldwide. Human papillomavirus （HPV） plays a central role in the etiology of cervical cancer. It is important to describe the prevalence of HPV infection in different types of cervical lesions and to explore the relation between HPV viral load and the severity of cervical lesions. Methods To describe the HPV infection prevalence and viral load in different age groups, we retrospectively investigated 6405 cases of women who were organized by their units to take health-examination. They were given Hybrid Capture II tests between January 2005 and December 2006. The correlation between HPV viral load and pathology was assessed. Results Overall HPV infection prevalence was 29.1% （1864/6405）, while in women 18-20 years old it was 54.4% （31/57）, the highest among all age groups. After declining rapidly, HPV prevalence stabilized at about 30.0% in women aged 30 and older. Of the 6405 women, 1483 women had a colposcopic biopsy and 33.2% （492/1483） were positive for HPV DNA. Twenty-one percent of women with a normal diagnosis （238/1095） had HPV infection, a statistically significantly lower prevalence than in women with cervical lesions, including those with cervical intraepithelial neoplasia （68.8% in CIN1,66.7% in CIN2, and 76.5% in CIN3） or with cervical cancer （94.1%）. The correlation coefficient between viral load and cervical lesion severity was 0.134, which was not statistically significant （P=0.075）. Viral load values in women with CINs and cervical cancer were calculated, and no significant differences were identified. Conclusions The prevalence of high-risk HPV infection among women attending hospitals for health-examination in Shanghai is similar to the worldwide rate. HPV viral load can distinguish cervical lesions from normal individuals but cannot adequately predict the severity of cervical lesions.

关键词： human papillomavirus prevalence viral load, cervical intraepithelial neoplasia uterine cervical neoplasms

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