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Contractor Prequalification Based on Neural Networks

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Systems Science and Systems Engineering 2002年第2期11卷 209-214页

作者： ZHANG Jin-long, YANG lan-rongCollege of Management, Huazhong University of Science and Technology, Wuhan 430074, China College of Management Huazhong University of Science and Technology Wuhan 430074 China

Contractor Prequalification involves the screening of contractors by a project owner, according to a given set of criteria, in order to determine their competence to perform the work if awarded the construction contract. This paper introduces the capabilities of neural networks in solving problems related to contractor prequalification. The neural network systems for contractor prequalification has an input vector of 8 components and an output vector of 1 component. The output vector represents whether a contractor is qualified or not qualified to submit a bid on a project.

关键词： prequalification neural networks

Computer Control and Experimental Detection Technique——Analysis and Realization of State-matrix＇s Parameters of Digital Adjuster

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2007年第1期 137-137,139页

作者： long Yindong Jing lan Qiao Weimin

Circulating metabolites difference in type 2 diabetes patients from regions:a cross-sectional study

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Medical Data Mining 2024年第4期7卷 1-9页

作者： Jiang-lan long Zeng-Hui Miao Ling-Wei Kong Hui-Jing Cui Na-Na Zhang Dan Yan Beijing Institute of Clinical Pharmacy Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China Clinical laboratory Beijing Jiaotong University Community Health CenterBeijing 100044China Department of Pharmacy Kaifeng Hospital of Traditional Chinese MedicineKaifeng 475000China

Background:Type 2 diabetes(T2D)has already become a global *** its simple,rapid,economical,and relatively non-invasive,metabolic markers have become a method for T2D ***,region,race,and diet all affect the metabolism of the *** purpose of current study is to explore the differences of metabolites in T2D patients from ***:We recruited 103 T2D patients in two clinical centers,including 52 T2D patients from Beijing(T2D_(B))and 51 T2D patients from Kaifeng(T2D_(K)).The serum samples from T2D patients were analyzed using high-resolution mass *** screened using univariate and multivariate analysis,the differential metabolites were ***,to reveal biological information,we performed pathway analysis with the differential ***:Thirty-six differential metabolites were identified,including 16 metabolites were higher concentrations while 20 metabolites were lower concentrations in the serum of T2D_(B) patients than T2D_(K) *** were higher serum concentrations of L-phenylalanine,4-methyl-2-oxovaleric acid,L-carnitine,decanoylcarnitine,9-decenoylcarnitine and sphinganine in T2D_(B) patients,in which decanoylcarnitine in T2D_(B) patients was up to 35-fold higher than T2D_(K) *** there were lower concentrations of L-valine,L-isoleucine,arachidonic acid,oleic acid,16-hydroxyhexadecanoic acid,lysophosphatidylcholine(18:0)and 1-Phenylethylamine in T2D_(B) patients,in which 1-phenylethylamine in T2D_(B) patients was decreased to 0.45-fold lower than T2D_(K) *** reason for the differences might be that phosphatidylethanolamine biosynthesis,phosphatidylcholine biosynthesis,valine,leucine and isoleucine degradation,and beta-oxidation of very long chain fatty acids were different in T2D_(B) patients and in T2D_(K) ***:Metabolites from different pathways are independently related to regions,providing valuable insight and potential for the diagnosis and treatment

关键词： type 2 diabetes metabolomics region high-resolution mass spectrometer

Clinical and socioeconomic factors associated with delayed orchidopexy in cryptorchid boys in China: a retrospective study of 2423 cases

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Asian Journal of Andrology 2019年第3期21卷 304-308页

作者： Tian-Xin Zhao Bin Liu Yue-Xin Wei Yi Wei Xiang-Liang Tang Lian-Ju Shen Chun-lan long Tao Lin Sheng-De Wu Guang-Hui Wei Department of Urology Children's Hospital of Chongqing Medical University Chongqing 400014 China Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering Chongqing 400014 China Ministry of Education Key Laboratory of Child Development and Disorders Chongqing 400014 China China International Science and Technology Cooperation Base of Child Development and Critical Disorders Chongqing 400014 China Chongqing Key Laboratory of Pediatrics Chongqing 400014 China

We investigated the associations of clinical and socioeconomic factors with delayed orchidopexy for cryptorchidism in China. A retrospective study was conducted on cryptorchid boys who underwent orchidopexy at Children's Hospital at Chongqing Medical University in China from January 2012 to December 2017. Of 2423 patients, 410 (16.9%) received timely repair by 18 months of age, beyond which surgery was considered delayed. Univariate analysis suggested that the laterality of cryptorchidism (P = 0.001), comorbidities including inguinal hernia/scrotal hydrocele (P < 0.001) or urinary tract disease (P = 0.016), and whether patients lived in a poverty county (P < 0.001) could influence whether orchidopexy was timely or delayed. Logistic regression analysis suggested that the following factors were associated with delayed repair: unilateral rather than bilateral cryptorchidism (odds ratio [OR]= 1.752, P < 0.001), absence of inguinal hernia or hydrocele (OR = 2.027, P = 0.019), absence of urinary tract disease (OR = 3.712, P < 0.001), and living in a poverty county (OR = 2.005, P < 0.001). The duration of postoperative hospital stay and hospital costs increased with the patient's age at the time of surgery.

关键词： birth defect children congenital disorder cryptorchidism orchidopexy poverty

The Risk Evaluation of the Implement for Enterprise E-Business

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Systems Science and Systems Engineering 2002年第2期11卷 164-168页

作者： WANG Lin, ZHANG Jin-long, YANG lan-rongCollege of Management, Huazhong University of Science and Technology,Wuhan 430074, China College of Management Huazhong University of Science and Technology Wuhan 430074 China

In this paper, risk evaluation index system of electronic business is put forward for core manufactures. At the same time, risk evaluation method is established on the basis of fuzzy mathematics and grey theory, and i... 详细信息

关键词： electronic business (EB) fuzzy mathematics grey theory risk evaluation

Branched-chain/aromatic amino acids as integrated biomarker of type 2 diabetes mellitus: a systematic review and meta-analysis

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Medical Data Mining 2020年第1期3卷 10-21页

作者： Jiang-lan long Zhi-Rui Yang long Wang Yu-Mei Han Can Yan Dan Yan Beijing Key Laboratory and Joint Laboratory for International Cooperation of Bio-characteristic Profiling for Evaluation of Rational Drug Use Beijing Shijitan HospitalCapital Medical UniversityBeijing100038China Chengdu University of Traditional Chinese Medicine Chengdu611130China Department of Applied Mathematics and Statistics Johns Hopkins UniversityBaltimoreMD 21218USA Beijing Physical Examination Center Beijing100077China Guangzhou University of Chinese Medicine Guangzhou510006China

Background:As type 2 diabetes mellitus(T2DM)biomarkers,branched-chain amino acids(BCAAs:valine,leucine and isoleucine)and aromatic amino acids(AAAs:phenylalanine,tryptophan and tyrosine)may be correlated with the occurrence and development of ***,there is still no consensus on the disperse and isolated biomarkers of ***:To explore the correlation between amino acids and T2DM based on integrated biomarker approach ***:PubMed,Web of Science and CNKI were selected to search the literature published until August 31,*** included studies described the association between BCAAs,AAAs and *** effect model and fixed effect model were adopted in pooled analysis to determine mean difference and 95 percent confidence interval of *** biomarker was constructed in form of concentration change ratios or risk ratio(RR),relative risk(HR)and odds ratio(OR)of BCAAs and AAAs to reflect the integrated change information of amino ***:The selected 20 studies contained 14942 healthy individuals and 3615 T2DM *** levels of BCAAs,phenylalanine and tyrosine both in plasma and serum samples were increased among all T2DM patients compared with those of the healthy control subjects(P<0.00001).However,the mean difference of tryptophan concentration was not statistically significant(P=0.60).The concentration change ratios or HR/RR/OR of BCAAs and AAAs were connected to form integrated ***:The integrated biomarker including BCAAs and AAAs could reflect the basic characteristics of T2DM,which has the potential clinical value on comprehensive diagnosis of T2DM.

关键词： Branched-chain amino acids Aromatic amino acids Type 2 diabetes mellitus Integrated biomarker Meta-analysis

Numerical investigation on the aerodynamic drag reduction based on bottom deflectors and streamlined bogies of a high-speed train

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Journal of Central South University 2024年第9期31卷 3312-3328页

作者： JIANG Chen long jn-lan LI Yan-ong GAO Guang-jun FRANKLIN Eze State Key Laboratory of Heavy-duty and Express High-power Electric Locomotive Central South UniversityChangsha 410075China Key Laboratory of Traffic Safety on Track of Ministry of Education School of Traffic&Transportation EngineeringCentral South UniversityChangsha 410075China National&Local Joint Engineering Research Center of Safety Technology for Rail Vehicle Central South UniversityChangsha 410075China Key Laboratory of Railway Industry of Aerodynamics Central South UniversityChangsha 410075China

The complex structure of the bottom of a high-speed train is an important source of train aerodynamic ***,improving the bottom structure is of great significance to reduce the aerodynamic drag of the *** this study,computational fluid dynamics(CFD)based on three-dimensional steady incompressible Reynolds-average Naiver-Stokes(RANS)equations and Realizable k-ε turbulence model were utilized for numerical *** by the concept of streamlined design and the idea of bottom flow field control,this study iteratively designed the bogies in a streamlined shape and combined them with the bottom deflectors to investigate the joint drag reduction *** models,i.e.,single-bogie model,simplified train model,and eight-car high-speed train model,were created and their aerodynamic characteristics were *** results show that the single-bogie model with streamlined design shows a noticeable drag reduction,whose power bogie and trailer bogie experience 13.92%and 7.63%drag reduction,*** range of positive pressure area on the bogie is *** aerodynamic drag can be further reduced to 15.01%by installing both the streamlined bogie and the deflector on the simplified train *** the streamlined bogies and deflectors are used on the eight-car model together,the total drag reduction rate reaches 2.90%.Therefore,the proposed aerodynamic kit for the high-speed train bottom is capable to improve the flow structure around the bogie regions,reduce the bottom flow velocity,and narrow the scope of the train’s influence on the surrounding environment,achieving the appreciable reduction of aerodynamic *** paper can provide a new idea for the drag reduction of high-speed trains.

关键词： high-speed train numerical simulation drag reduction deflector streamlined design

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试论新常态下的农业供给侧结构性改革

西北农林科技大学学报（社会科学版） 2017年第6期17卷 25-31页

作者：陈龙方兰陕西师范大学西北历史环境与经济社会发展研究院西安710062

农业供给侧结构性改革是当前我国"三农"工作的主线。农产品去库存是农业供给侧结构性改革的直接原因,农业缺乏竞争力是农业供给侧结构性改革的本质原因,农业生产方式转变是农业供给侧结构性改革的主攻方向,农业可持续发展是农业供给侧... 详细信息

农业供给侧结构性改革是当前我国"三农"工作的主线。农产品去库存是农业供给侧结构性改革的直接原因,农业缺乏竞争力是农业供给侧结构性改革的本质原因,农业生产方式转变是农业供给侧结构性改革的主攻方向,农业可持续发展是农业供给侧结构性改革的最终目的。农业供给侧结构性改革的理论基础是中国特色社会主义政治经济学、新供给学派以及农业发展理论的有机结合。当前我国农业供给侧结构性改革的有三条主要路径:培育新型职业农民,形成现代农业生产主体;扶持新型农业经营主体,形成现代农业生产方式;推动产业融合,形成现代农业全新业态。

关键词：农业供给侧结构性改革农业现代化新常态产业融合

A 0.35μm CMOS Mixer for 2.45-GHz RFID Application

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射频世界 2007年第1期 88-90页

作者： Hao-Ran Yu Jia-long lan School of Electronic Engineering,UESTC

A RF mixer with both low noise and high linearity is designed,operating at 2.45-GHz ISM band for RFID *** designed mixer uses an optimal input matching network and the carefully chosen sizes of transistors,also with the appropriate bias point,to improve the noise figure(NF).Also,with a resonant LC loop as the current source and a parallel PMOS-resistor as the load,the mixer has a high *** post simulation results show that the single side- band noise figure of 8.57 dB,conversion gain of 10.02 dB,input 1-dB compression point(P-1dB)of-8.33 dBm,and input third-order intercept point(IIP3)of 5.35 dBm.

关键词： RFID ISM CMOS mixers linearity noise