检索结果-南通市图书馆

New approach to eliminate structural redundancy in case resource pools using α mutual information

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 Systems Engineering and Electronics 2013年第4期24卷 625-633页

作者： man xu Haiyan Yu Jiang Shen Department of Industrial Engineering Nankai University College of management and Economics Tianjin University

Structural redundancy elimination in case resource pools （CRP） is critical for avoiding performance bottlenecks and maintaining robust decision capabilities in cloud computing services. For these purposes, this paper proposes a novel approach to ensure redundancy elimination of a reasoning system in CRP. By using α entropy and mutual information, functional measures to eliminate redundancy of a system are developed with respect to a set of outputs. These measures help to distinguish both the optimal feature and the relations among the nodes in reasoning networks from the redundant ones with the elimination criterion. Based on the optimal feature and its harmonic weight, a model for knowledge reasoning in CRP （CRPKR） is built to complete the task of query matching, and the missing values are estimated with Bayesian networks. Moreover, the robustness of decisions is verified through parameter analyses. This approach is validated by the simulation with benchmark data sets using cloud SQL. Compared with several state-of-the-art techniques, the results show that the proposed approach has a good performance and boosts the robustness of decisions.

关键词： case resource pool (CRP) knowledge reasoning redundancy elimination α mutual information robust decision.

Relationship between high dietary fat intake and Parkinson’s disease risk: a meta-analysis

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2019年第12期14卷 2156-2163页

作者： Yan Qu Xi Chen man-man xu Qiang Sun Department of Physiology School of Basic Medicine Qingdao University Qingdao Shandong Province China Intensive Care Unit The Affiliated Hospital of Qingdao University Qingdao Shandong Province China

OBJECTIVE: To assess whether dietary fat intake influences Parkinson’s disease risk. DATA SOURCES: We systematically surveyed the Embase and PubMed databases, reviewing manuscripts published prior to October 2018. The following terms were used:(“Paralysis agitans” OR “Parkinson disease” OR “Parkinson” OR “Parkinson’s” OR “Parkinson’s disease”) AND (“fat” OR “dietary fat” OR “dietary fat intake”). DATA SELECTION: Included studies were those with both dietary fat intake and Parkinson’s disease risk as exposure factors. The Newcastle-Ottawa Scale was adapted to investigate the quality of included studies. Stata V12.0 software was used for statistical analysis. OUTCOME MEASURES: The primary outcomes included the relationship between high total energy intake, high total fat intake, and Parkinson’s disease risk. The secondary outcomes included the relationship between different kinds of fatty acids and Parkinson’s disease risk. RESULTS: Nine articles met the inclusion criteria and were incorporated into this meta-analysis. Four studies scored 7 and the other five studies scored 9 on the Newcastle-Ottawa Scale, meaning that all studies were of high quality. Meta-analysis results showed that high total energy intake was associated with an increased risk of Parkinson’s disease (P = 0.000, odds ratio (OR)= 1.49, 95% confidence interval (CI): 1.26–1.75);in contrast, high total fat intake was not associated with Parkinson’s disease risk (P = 0.123, OR = 1.07, 95% CI: 0.91–1.25). Subgroup analysis revealed that polyunsaturated fatty acid intake (P = 0.010, OR = 1.03, 95% CI: 0.88–1.20) reduced the risk of Parkinson’s disease, while arachidonic acid (P = 0.026, OR = 1.15, 95% CI: 0.97–1.37) and cholesterol (P = 0.002, OR = 1.09, 95% CI: 0.92–1.29) both increased the risk of Parkinson’s disease. Subgroup analysis also demonstrated that, although the results were not significant, consumption of n-3 polyunsaturated fatty acids (P = 0.071, OR = 0.88, 95% CI: 0.73–1.05),α-linolenic ac

关键词： nerve regeneration dietary fat Parkinson's disease risk meta-analysis total energy intake polyunsaturated fatty acids arachidonic acid cholesterol α-linolenic acid linoleic acid n-3/n-6 polyunsaturated fatty acid intake ratio monounsaturated fatty acids neural regeneration

A Convenient Synthesis of Antibacterial Linezolid from (S)-Glyceraldehyde Acetonide

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2006年第3期17卷 302-304页

作者： Guang Yu xu Yi ZHOU man Cai xu College of Chemistry and Chemical Engineering Hunan Normal University Changsha 410081

A convenient synthesis of oxazolidinone antibacterial linezolid from readily available L-ascorbic acid is described. The key steps include reductive amination of arylamine and （S）-glyceraldehyde acetonide in the pre... 详细信息

关键词： Linezolid antibacterial synthesis ascorbic acid.

Morphology and Mechanical Properties of Immiscible Polyethylene/Polyamide12 Blends Prepared by High Shear Processing

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2017年第9期35卷 1132-1142页

作者： wen-jin yu shu-man xu li zhang 傅强 College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China

In this work, completely immiscible polyethylene/polyamidel2 （PE/PA12） blends were prepared by high shear extruder. The morphology and mechanical properties of the blends were investigated as a function of rotation speed. It was found that the high shear processing is an effective method to improve the dispersion of the PAl2 phase in PE matrix when PA 12 contents are 5 wt% and 10 wt%, and the dispersed phase particle size is reduced with the increase of rotation speed from 100 r/min to 500 r/min. However, with further increase of PAl2 content to 20 wt%, high shear processing has no effect on the phase morphology of the blends. Accordingly, a largely increased elongation at break and impact strength are observed for PE/PAl2/95/5 and PE/PA12/90/10 blends obtained at high rotation speeds but no effect on the property of PE/PAI2/80/20. Annealing experiment demonstrated that the obtained phase morphology is not stable thus compatibilizer should be introduced in the future work. This work could provide a guideline for the application of high shear processing in the preparation of polymer blends with huge polarity difference.

关键词： Immiscible polyethylene/polyamidel2 (PE/PA12) blends High shear processing Phase morphology

Alkylene-functionality in bridged and fused nitrogen-rich poly-cyclic energetic materials:Synthesis,structural diversity and energetic properties

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第5期35卷 18-46页

作者： man xu Nanxi Xiang Ping Yin Qi Lai Siping Pang School of Materials Science&Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China

From the standpoint of chemical structures,the organic backbones of energetic materials can be classified into aromatic rings,nonaromatic rings,and open *** the category of aromatic energetic compounds exhibits several advantages in the regulation of energetic properties,the nonaromatic heterocycles,assembling nitramino explosophores with simple alkyl bridges,still have prevailed in benchmark *** methylene bridge plays a pivotal role in the constructions of the classic nonaromatic heterocycle-based energetic compounds,e.g.,hexahydro-1,3,5-trinitro-1,3,5-triazine(RDX)and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine(HMX),whereas ethylene bridge is the core moiety of state-of-the-art explosive 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane(CL-20).In this context,it is of great interest to employ simple and practical bridges to assemble aromatic and nonaromatic nitrogen-rich heterocycles,thereby expanding the structural diversity of energetic materials,e.g.,bridged and fused nitrogen-rich ***,alkyl-bridged poly-heterocycles highlight the potential for the open chain type of energetic *** this review,the development of alkyl bridges in linking nitrogen-rich heterocycles is presented,and the perspective of the newly constructed energetic backbones is summarized for the future design of advanced energetic materials.

关键词： Energetic materials Alkyl bridge strategy Nitrogen-rich azoles Fused heterocycles Azoles

Multiple-Stimuli Responsive and Tunable Luminescent Suprarnolecular Assembly by Oligo（p-phenylvinylene） and Surfactant

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2018年第6期36卷 526-530页

作者： xu-man Chen Yong Chen Yu Liu College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Nankai University Tianjin 300071 China

Achieving multicolor photoluminescence under multiple stimuli response based on a single fluorescent compound remains a great challenge. Herein, we report a novel multicolor fluorescent supramolecular assembly, which was constructed from surfactant sodium dodecyl sulfate （SLS） and fluorescent compound 1 bearing a rigid symmetrical acceptor-donor-acceptor structure. The luminescence property of 1/SLS assembly showed the multiple stimuli response towards temperature, cyclodextrin complexation and UV light irradiation, exhibiting the tunable emission wavelengths from 490 nm to 590 nm and the multicolor photoluminescence including cyan, green, yellow and orange. Furthermore, this assembly could be used in light writing owing to the fast fluorescence change within 15 s. These results could provide a convenient and useful method for fabricating smart tunable photoluminescent materials.

关键词： tunable photoluminescence supramolecular assembly multiple stimuli response oligo(p-phenylvinylene) surfactant

Modelling of wind power forecasting errors based on kernel recursive least-squares method

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 Modern Power Systems and Clean Energy 2017年第5期5卷 735-745页

作者： man xu Zongxiang LU Ying QIAO Yong MIN State Key Lab of Power Systems Department of Electrical EngineeringTsinghua UniversityHaidian DistrictBeijing 100084China

Forecasting error amending is a universal solution to improve short-term wind power forecasting accuracy no matter what specific forecasting algorithms are applied. The error correction model should be presented considering not only the nonlinear and non-stationary characteristics of forecasting errors but also the field application adaptability problems. The kernel recursive least-squares(KRLS) model is introduced to meet the requirements of online error correction. An iterative error modification approach is designed in this paper to yield the potential benefits of statistical models, including a set of error forecasting models. The teleconnection in forecasting errors from aggregated wind farms serves as the physical background to choose the hybrid regression variables. A case study based on field data is found to validate the properties of the proposed approach. The results show that our approach could effectively extend the modifying horizon of statistical models and has a better performance than the traditional linear method for amending short-term forecasts.

关键词： Forecasting error amending Kernel recursive least-squares(KRLS) Spatial and temporal teleconnection Wind power forecast

F-box and leucine-rich repeat 6 promotes gastric cancer progression via the promotion of epithelial-mesenchymal transition

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2023年第3期15卷 490-503页

作者： Lei Meng Yu-Ting Hu A-man xu Department of General Surgery First Affiliated Hospital of Anhui Medical UniversityHefei 230022Anhui ProvinceChina Department of Immunology College of Basic MedicineAnhui Medical UniversityHefei 230022Anhui ProvinceChina

BACKGROUND F-box and leucine-rich repeat 6(FBXL6)have reportedly been associated with several cancer ***,the role and mechanisms of FBXL6 in gastric cancer(GC)require further *** To investigate the effect of FBXL6 in GC tissues and cells and the underlying *** TCGA and GEO database analysis was performed to evaluate the expression of FBXL6 in GC tissues and adjacent normal *** transcription-quantitative polymerase chain reaction,immunofluorescence,and western blotting were used to detect the expression of FBXL6 in GC tissue and cell *** clone formation,5-ethynyl-2’-deoxyuridine(EdU)assays,CCK-8,transwell migration assay,and wound healing assays were performed to evaluate the malignant biological behavior in GC cell lines after transfection with FBXL6-shRNA and the overexpression of FBXL6 ***,in vivo tumor assays were performed to prove whether FBXL6 promoted cell proliferation in *** FBXL6 expression was upregulated more in tumor tissues than in adjacent normal tissues and positively associated with clinicopathological *** outcomes of CCK-8,clone formation,and Edu assays demonstrated that FBXL6 knockdown inhibited cell proliferation,whereas upregulation of FBXL6 promoted proliferation in GC ***,the transwell migration assay revealed that FBXL6 knockdown suppressed migration and invasion,whereas the overex pression of FBXL6 showed the opposite *** the subcutaneous tumor implantation assay,it was evident that the knockdown of FBXL6 inhibited GC graft tumor growth in *** blotting showed that the effects of FBXL6 on the expression of the proteins associated with the epithelial-mesenchymal transition-associated proteins in GC *** Silencing of FBXL6 inactivated the EMT pathway to suppress GC malignancy in ***6 can potentially be used for the diagnosis and targeted therapy of patients with GC.

关键词： Gastric cancer F-box and leucine-rich repeat 6 Invasion Epithelial-mesenchymal transition Metastasis

Reoperation in an adult female with "right-sided" Hirschsprung's disease complicated by refractory hypertension and cough

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2016年第41期22卷 9235-9241页

作者： Zhi-Jian Wei Lei Huang A-man xu Department of Gastrointestinal Surgery The First Affiliated Hospital of Anhui Medical University Hefei 230022 Anhui Province China German Cancer Research Center 69120 Heidelberg Germany Department of General Surgery The Fourth Affiliated Hospital of Anhui Medical University Hefei 230000 Anhui Province China

Hirschsprung's disease(HD) is an intestinal malformation caused by the innate absence of ganglion cells in the neural plexus of the colorectal wall, and is most common in male infants. It is rare in adult, and is usually left-sided. Herein we reported based on the CARE guidelines a case of a 47-year-old adult female suffering from "right-sided" HD complicated by refractory hypertension and cough. The patient with a history of cesarean section and with digestive unfitness(abdominal pain, distention, and constipation) only since 20 years old had recurrence of HD after initial surgery due to the incomplete removal of the HD-affected bowel based on a diagnosis of "chronic ileus", leading to the relapse of the digestive symptoms and the emergence of some intractable circulatory and respiratory complications which could be hardly controlled by conservative treatment. During the long interval before coming to our department for help, she had been re-hospitalized for several times with various misdiagnoses and supplied merely with symptomatic treatment which could only achieve temporary symptomatic relief. At her admission to our department, the imaging examinations strongly indicated recurrent HD which was further supportedb y p a t h o l o g i c a l e x a m i n a t i o n s, a n d r i g h t h e m i-colectomy was performed to remove the remnant aganglionic intestinal segment. Intraoperative and postoperative pathology supported the completeness of the definitive resection. Post-operation, the patient's bowel motility significantly improved, and interestingly, the complications disappeared. For adult patients with long-term constipation combined with cough and hypertension, rare diseases like HD which requires definite surgery and which could be "right-sided" should not be overlooked. It is vital to diagnose and cure HD patients in childhood. Through the comparison of the two surgeries, it is noteworthy that for diagnosed HD, sufficient removal of the non-functional intestin

关键词： Adult Hirschsprung’s disease Reoperation Ileus Chronic constipation Hypertension Cough CARE