检索结果-南通市图书馆

Low-Rank Combined Adaptive Sparsifying Transform for Blind Compressed Sensing Image Recovery

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2020年第4期29卷 678-685页

作者： HE Ning WANG Ruolin LYU Jiayi XUE Jian Beijing Union University Logistics Department of Beijing Military region Capital Normal University University of Chinese academic of Sciences

Compressed sensing(CS) exploits the sparsity of images or image patches in a transform domain or synthesis dictionary to reconstruct images from undegraded *** the synthesis dictionary learning methods involves NP-hard sparse coding and expensive learning steps, sparsifying transform based blind compressed sending(BCS) has been shown to be effective and efficient in applications, while also enjoying good convergence *** minimizing the rank of an overlapped patch group matrix to efficiently exploit the nonlocal self-similarity features of the image, while the sparsifying transform model imposes the local features of the *** propose a combined low-rank and adaptive sparsifying transform(LRAST) BCS method to better represent natural *** utilized the patch coordinate(PCD) descent algorithm to optimize the method, and this enforced the intrinsic local sparsity and nonlocal self-similarity of the images simultaneously in a unified *** experimental results indicated a promising performance, even in comparison to state-of-theart methods.

关键词： Low-rank Sparsifying transform Blind compressed sensing(BCS) Patch coordinate descent(PCD) Image recovery

Satisfaction of the Service Provider with the Organization of the Timely Cervical Cancer Detection Program

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Health 2017年第2期9卷 289-298页

作者： Gutierrez-Enriquez Sandra Olimpia Teran-Figueroa Yolanda Gaytan-Hernandez Dario Diaz-Oviedo Aracely Zuniga-Martinez Ma.de Lourdes Hernandez-Nava Nereyda Cruz Ortiz Maribel Perez Rodriguez Maria del Carmen Ramirez-Ramirez Rocio Faculty of Nursing and Nutrition Autonomous University of San Luis PotosiSan Luis PotosiMexico academic coordination altiplano region Autonomous University of San Luis PotosiSan Luis PotosiMexico

Cervical cancer is a priority health problem in Mexico. The objective of this work was to know the degree of satisfaction of the service provider with the organization of the program of Timely Detection of Cervical Cancer, specifically in taking of the cervical cytology. The study design was observational, transversal and prospective conducted from January to May 2015 in Jurisdiction 1 of the Health Services of San Luis Potosí, Mexico, in 20 health centers. Participants were 87 service providers whose function is to take cervical cytology (Pap smears). A 32-question questionnaire was applied, with Likert scale with 5 levels of response: 1 (dissatisfied), 2 (little satisfied), 3 (indifferent), 4 (satisfied) and 5 (very satisfied). The score range was 32 points (minimum job satisfaction) up to 160 points (Maximum job satisfaction). We analyzed 2 dimensions: 1) intrinsic factors that have to do with motivation and professional recognition, and 2) extrinsic factors related to infrastructure, materials, remuneration and labor policies. Each factor consisted of four categories. Descriptive statistics and linear correlation of Pearson were applied for the analysis of data. Participants signed an informed consent letter. Of 4 categories, in the intrinsic dimension, the one with the highest percentage of satisfaction was “delegation of activities” with 28.8%. In the extrinsic dimension, the category with the highest percentage of satisfaction was “infrastructure and materials” with 49.4%;while satisfaction increase in intrinsic dimensions also does in extrinsic dimensions, such correlations are significant (p academic level and older people showed the highest level of satisfaction.

关键词： Job Satisfaction Cervical Cancer Health Providers

Clinical Parameters of Metabolic Control (HbA_(1c)) and Deterioration of Peripheral Arterial Perfusion in Type 2 Diabetes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Diabetes Mellitus 2017年第1期7卷 31-39页

作者： Made Lourdes Zuniga-Martinez Yolanda Teran-Figueroa Laura Escarlet Guerrero-Cruz Angel Antonio Vertiz-Hernandez academic coordination altiplano region Autonomous University of San Luis PotosiSan Luis PotosiMexico Faculty of Nursing and Nutrition Autonomous University of San Luis PotosiSan Luis PotosiMexico

Objective: To determine the relationship between clinical parameters (HbA1c) whit metabolic control and deterioration of peripheral arterial perfusion in diabetic patients. Methodology: 108 medical records of patients with type 2 diabetes mellitus were evaluated. We obtained averages of: blood glucose (162.3 ± 73.10 mg/dl), glycated hemoglobin (HbA1c = 7.64% ± 1.77%), cholesterol (189.28 ± 35.25 mg/dl), triglycerides (189.11 ± 87.76 mg/dl), Systolic Blood Pressure (SBP = 119.69 ± 14.95 mmHg), Diastolic Blood Pressure (DBP = 77.15 ± 9.55 mmHg) and Media Blood Pressure (MBP = 91.36 ± 9.89 mmHg). We correlated variable HbA1c with vascular injury symptomatology. Results: Correlation was found between sensitivity dysfunction and HbA1c with a statistical significance of p = 0.01, and a correlation Kendal coefficient w = 0.01, any other parameter of metabolic control was not correlated with symptoms of vascular injury. Conclusion: It is remarkable that the sensitivity dysfunction is a symptom of poorly vascularized lower extremities caused for both functional impairment and structural changes in diabetic patients’ peripheral nerves, even in the preclinical stage of vascular disease. The HbA1c could also be investigated as a likely sensitivity dysfunction biomarker in DM due to the correlation presented in this study but more studies must be realized.

关键词： Protein Glycation Vascular Disease HbA_(1c) Type 2 Diabetes Mellitus

Pediatric Clinical Pharmacology and Child Health:A Canadian Perspective

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

儿科药学杂志 2011年第4期17卷 1-6页

作者： Stuart Macleod Research coordination and academic Development Provincial Health Services Authority

Introduction Canadian academic centres and children’s hospitals have had a longstanding interest in the improvement of drug therapy for children through research conducted across the four pillars of activity identifi... 详细信息

关键词： Pediatric Clinical Pharmacology and Child Health

Self-Efficacy in Sexual Health:A Focus on Adolescents in Mexico

在线全文

学校读者我要写书评

暂无评论

Health 2017年第10期9卷 1459-1466页

作者： Rocio Rocha-Rdz Macario Orduna Cabrera Mariely Acosta-Alvarez Nereyda Hernandez-Nava Department of Nursing Multidisciplinary Academic Unit Middle ZoneAutonomous University of San Luis PotosíThe Research Group Nursing Care in Vulnerable GroupsSan Luis PotosiMexico Multidisciplinary academic Unit Middle Zone Autonomous University of San Luis PotosiSan Luis PotosiMexico Department of Nursing University of AguascalientesAguascalientesMexico Department of Nursing Academic Coordination Altiplano RegionAutonomous University of San Luis PotosiSan Luis PotosiMexico

Self-efficacy is a belief in a person’s ability to perform action or behavior to achieve what is desired independent of the actual capacity of personal outcome. Objective: To determine the level of self-efficacy in adolescents of a public institution in the state of San Luis Potosí. Methodology: A correlational study of 179 adolescents aged 14 to 17 years using stratified random sampling. The instrument used was the self-control scale for the prevention of STIs/ AIDS (SEA-27) consisting of 40 items and Cronbach’s alpha of 0.908. Results: The surveys of the adolescent population correspond to 179 students, of whom 56% are men and 44% are women, the average age being 15 years. The level of self-efficacy of students for HIV-AIDS prevention, where the most relevant data are related to evaluated: 76% corresponds to students who do not induce someone to have self-efficacy, 75% say no to a person whose sexual history is unknown, 74% say no to someone whose drug history is unknown and 70% say no to someone who has drunk and/or consumed alcohol (X2 = 39,638, df = 4 p < 000);Conclusions: In general, adolescents today are perceived as vulnerable to sexual behavior and have safe sex, which leads us to believe that they do not protect against HIV/AIDS and unwanted pregnancies.

关键词： HIV/AIDS Self-Efficacy Sexual Behavior

Silver Nanoparticles Supported on TiO_(2) and Their Antibacterial Properties:Effect of Surface Confinement and Nonexistence of Plasmon Resonance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Materials Sciences and Applications 2014年第12期5卷 895-903页

作者： Zoe Vineth Quinones-Jurado Miguel ángel Waldo-Mendoza Hugo Marcelo Aguilera-Bandin Edgar Giovanny Villabona-Leal Elsa Cervantes-González Elías Pérez Innovation and Development in Advanced Materials POLYnnova GroupSan Luis PotosíMéxico A Schulman of México San Luis PotosíMéxico Institute of Physic Autonomous University of San Luis PotosíSan Luis PotosíMéxico academic coordination Altiplano RegionAutonomous University of San Luis PotosíSan Luis PotosíMéxico

Ag/TiO2 nanocomposites are usually regarded as an effective synergy for high antimicrobial performance under ultraviolet-visible light conditions. This study confirmed that the surface plasmon resonance of Ag NPs plays an important role in relation to the NPs size and consequently with the antibacterial effect of the nanocomposite. We observed that under visible light the reactivity of TiO2 cannot be amplified when it is supporting Ag NPs that have an inactive photocatalytically surface. The results confirmed that the antimicrobial effectiveness of nanocomposite based on Ag NPs supported-TiO2 is closely associated to the contact surface area and to the electronic performance of the noble metal.

关键词： Ag-TiO_(2) Antibacterial Silver Nanoparticles Surface Confinement

Environmental and spatial contributions to tree community assembly across life stages and scales in evergreen-deciduous broadleaf karst forests,southwest China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2023年第5期34卷 1323-1331页

作者： Liang Su Hu Du Fuping Zeng Wanxia Peng Hua Wang Kelin Wang Menzhen Lu Tongqing Song Key Laboratory of Agro-Ecological Processes in Subtropical region Institute of Subtropical AgricultureChinese Academic of SciencesChangshaPeople’s Republic of China Guangxi Key Laboratory of Karst Ecological Processes and Services Huanjiang Observation and Research Station of Karst EcosystemChinese Academic of SciencesHuanjiangPeople’s Republic of China College of Resources and Environment Hunan Agricultural UniversityChangshaPeople’s Republic of China

Spatial and environmental processes are two ecological processes that have attracted considerable attention in plant community assembly,depending on sampling scale and life ***,the processes that determine community assembly have not been studied in the karst region of southwest *** this study,a 25-ha(500 m×500 m)monitoring plot within the subtropical climax forest in the karst region was established and canonical correspondence analysis was used to reveal the effects of topography and soil on the spatial patterns of tree community *** study suggests that spatial processes dominate species composition and the combined effects of spatial and environmental processes play an important *** interpretation rate increases with enlarging the sampling ***,the pattern of variation partitioning was similar in different life *** variables significantly affected species composition at different sampling sizes and life histories and had a higher interpretation rate of species composition on larger s ampling *** wetness index was the most important variable to explain species composition of the environmental *** results suggest that it is necessary to consider the relative importance of environmental and spatial factors on community assembly to better understand,conserve,and manage subtropical karst forests.

关键词： Species composition Spatial distribution Variation partitioning Community assembly Karst ecosystems

Catalysis of organic pollutant photodegradation by metal phthalocyanines immobilized on TiO_2@SiO_2

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2011年第10期56卷 969-976页

作者： WANG ShuLian FANG YanFen YANG Yong LIU JunZi DENG AnPing ZHAO XiaoRong HUANG YingPing Engineering Research Center of Eco-environment in Three Gorges Reservoir region Ministry of Education China Three Gorges University Yichang 443002 China Shanghai Institute of Ceramics Chinese Academic of Sciences Shanghai 200050 China

A TiO2@SiO2 hybrid support was prepared by the sol-precipitation method using n-octylamine as a *** photocatalyst manganese phthalocyanine tetrasulfonic acid (MnPcS) was immobilized on the support to form MnPcS-TiO2@SiO2.X-ray diffraction (XRD) and UV-Visible diffuse reflectance spectra (UV-Vis DRS) were employed to characterize the *** photocatalytic degradation of rhodamine B (RhB) and the catalytic oxidation of o-phenylenediamine (OPDA) under visible light irradiation were used as probe *** mineralization efficiency and the degradation mechanism were evaluated using chemical oxygen demand (COD Cr) assays and electron spin resonance (ESR),*** was efficiently degraded by immobilized MnPcS-TiO2@SiO2 under visible light *** decolorization of RhB occurred after 240 min of irradiation and 64.02% COD Cr removal occurred after 24 h of *** results indicated that the oxidation process was dominated by the hydroxyl radical (·OH) and superoxide radical (O-·2) generated in the system.

关键词： TiO2 光降解催化剂有机污染物金属酞菁 SiO2 CODcr去除率可见光照射

Synthesis,Structure and Properties of Three-dimensional Gd(Ⅲ),Eu(Ⅲ) coordination Polymers via in situ Decarboxylation

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2009年第5期25卷 614-619页

作者： WANG Chuan-sheng GU Xiao-fu SUN Ya-guang GAO En-jun ZHANG Wan-zhong Laboratory of coordination Chemistry Shenyang Institute of Chemical Technology Shenyang 110142 P. R. China

Two three-dimensional lanthanide（Ⅲ） coordination polymers with the formula [Ln（PYDC）（NA）（H2O）]n [Ln=Gd（1）, Eu（2）, H2PYDC=pyridine-2,5-bicarboxylic acid, HNA=nicotinic acid] have been hydrothermally synthesized and characterized by elemental analysis, IR, and single crystal X-ray diffraction. The NA came from in situ decarboxylation of the part of PYDC. X-ray single crystal structural analyses reveal that complexes 1 and 2 are isomorphous, they possess the 43.63 topology assembled by Gd^3＋/Eu^3＋ and two different multidentate carboxylate ligands Magnetic measurements show that antiferromagnetic coupling exists between adjacent Gd^3＋ ions in complex 1. The complex 2 exhibits the corresponding characteristic luminescence in the visible region under an excitation at 305 nm.

关键词： coordination polymer Decarboxylation Luminescence Magnetic property