159 research outputs found
sj-docx-1-aop-10.1177_10600280211055508 – Supplemental material for Valproic Acid After Neurosurgery Induces Elevated Risk of Liver Injury: A Prospective Nested Case-Control Study
No full textSupplemental material, sj-docx-1-aop-10.1177_10600280211055508 for Valproic Acid After Neurosurgery Induces Elevated Risk of Liver Injury: A Prospective Nested Case-Control Study by Jinlin Guo, Jiuhong Ma, Shan Wang, Xingang Li, Hongming Ji, Yuanping Li, Fangchen Peng and Yiqi Sun in Annals of Pharmacotherapy</p
sj-docx-3-aop-10.1177_10600280211055508 – Supplemental material for Valproic Acid After Neurosurgery Induces Elevated Risk of Liver Injury: A Prospective Nested Case-Control Study
No full textSupplemental material, sj-docx-3-aop-10.1177_10600280211055508 for Valproic Acid After Neurosurgery Induces Elevated Risk of Liver Injury: A Prospective Nested Case-Control Study by Jinlin Guo, Jiuhong Ma, Shan Wang, Xingang Li, Hongming Ji, Yuanping Li, Fangchen Peng and Yiqi Sun in Annals of Pharmacotherapy</p
sj-docx-2-aop-10.1177_10600280211055508 – Supplemental material for Valproic Acid After Neurosurgery Induces Elevated Risk of Liver Injury: A Prospective Nested Case-Control Study
No full textSupplemental material, sj-docx-2-aop-10.1177_10600280211055508 for Valproic Acid After Neurosurgery Induces Elevated Risk of Liver Injury: A Prospective Nested Case-Control Study by Jinlin Guo, Jiuhong Ma, Shan Wang, Xingang Li, Hongming Ji, Yuanping Li, Fangchen Peng and Yiqi Sun in Annals of Pharmacotherapy</p
The exploration of a category theory-based virtual Geometrical product specification system for design and manufacturing
No full textIn order to ensure quality of products and to facilitate global outsourcing, almost all
the so-called “world-class” manufacturing companies nowadays are applying various
tools and methods to maintain the consistency of a product’s characteristics
throughout its manufacturing life cycle. Among these, for ensuring the consistency of
the geometric characteristics, a tolerancing language − the Geometrical Product
Specification (GPS) has been widely adopted to precisely transform the functional
requirements from customers into manufactured workpieces expressed as tolerance
notes in technical drawings. Although commonly acknowledged by industrial users as
one of the most successful efforts in integrating existing manufacturing life-cycle
standards, current GPS implementations and software packages suffer from several
drawbacks in their practical use, possibly the most significant, the difficulties in
inferring the data for the “best” solutions. The problem stemmed from the foundation
of data structures and knowledge-based system design. This indicates that there need
to be a “new” software system to facilitate GPS applications.
The presented thesis introduced an innovative knowledge-based system − the
VirtualGPS − that provides an integrated GPS knowledge platform based on a stable
and efficient database structure with knowledge generation and accessing facilities.
The system focuses on solving the intrinsic product design and production problems
by acting as a virtual domain expert through translating GPS standards and rules into
the forms of computerized expert advices and warnings. Furthermore, this system can
be used as a training tool for young and new engineers to understand the huge amount
of GPS standards in a relative “quicker” manner.
The thesis started with a detailed discussion of the proposed categorical modelling
mechanism, which has been devised based on the Category Theory. It provided a
unified mechanism for knowledge acquisition and representation, knowledge-based
system design, and database schema modelling. As a core part for assessing this
knowledge-based system, the implementation of the categorical Database
Management System (DBMS) is also presented in this thesis. The focus then moved
on to demonstrate the design and implementation of the proposed VirtualGPS system.
The tests and evaluations of this system were illustrated in Chapter 6. Finally, the
thesis summarized the contributions to knowledge in Chapter 7.
After thoroughly reviewing the project, the conclusions reached construe that the
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entire VirtualGPS system was designed and implemented to conform to Category
Theory and object-oriented programming rules. The initial tests and performance
analyses show that the system facilitates the geometric product manufacturing
operations and benefits the manufacturers and engineers alike from function designs,
to a manufacturing and verification
Effects of GaN Capping on the Structural and the Optical Properties of InN Nanostructures Grown by Using MOCVD
No full textInN nanostructures with and without GaN capping layers were grown by using metal-organic chemical vapor deposition. Morphological, structural, and optical properties were systematically studied by using atomic force microscopy, X-ray diffraction (XRD) and temperature-dependent photoluminescence (PL). XRD results show that an InGaN structure is formed for the sample with a GaN capping layer, which will reduce the quality and the IR PL emission of the InN. The lower emission peak at similar to 0.7 eV was theoretically fitted and assigned as the band edge emission of InN. Temperature-dependent PL shows a good quantum efficiency for the sample without a GaN capping layers; this corresponds to a lower density of dislocations and a small activation energy
Growth of Cubic GaN by MOCVD at High Temperature
No full textHigh quality cubic GaN (c-GaN) is grown by metalorganic vapor deposition (MOCVD) at an increased growth temperature of 900 ℃, with the growth rate of 1.6 μm/h. The full width at half maximum (FWHM) of room temperature photoluminescence (PL) for the high temperature grown GaN film is 48meV. It is smaller than that of the sample grown at 830 ℃. In X-ray diffraction (XRD) measurement, the high temperature grown GaN shows a (002) peak at 20° with a FWHM of 21'. It can be concluded that, although c-GaN is of metastable phase, high growth temperature is still beneficial to the improvement in its crystal quality. The relationship between the growth rate and growth temperature is also discussed
Etching Behavior of GaN/GaAs(001) Epilayers Grown by MOVPE
No full textWet etching characteristics of cubic GAN (c-GaN) thin films grown on GaAs(001) by metalorganic vapor phase epitaxy (MOVPE) are investigated. The samples are etched in HCl, H_3PO_4, KOH aqueous solutions, and molten KOH at temperatures in the range of 90～300 ℃. It is found that different solution produces different etch figure on the surfaces of a sample. KOH-based solutions produce rectangular pits rather than square pits. The etch pits elongate in [1(1-bar)0] direction, indicating asymmetric etching behavior in the two orthogonal directions. An explanation based on relative reactivity of the various crystallographic planes is employed to interpret qualitatively the asymmetric etching behavior. In addition, it is found that KOH aqueous solution would be more suitable than molten KOH and the two acids for the evaluation of stacking faults in c-GaN epilayers
(Figure 1) Rheological properties for six oil samples at different temperatures
No full textIt is necessary to reduce the viscosity of heavy crude oil in many cases such as transportation and production of crude oil. One of the methods to reduce the viscosity is the addition of lighter oils. There have been many models to calculate the viscosity of the mixed oil. Unfortunately, there is no universal model for the computation. In this paper, five frequently-used models were chosen and evaluated. Totally 20 mixed oil samples were prepared with different ratios of light to crude oil from different oil wells but the same oil field. The viscosities of the mixtures under the same shear rates of 10 s(-1) were measured using a rotation viscometer at the temperatures ranging from 30 degrees C to 120 degrees C. After comparing all of the experimental data with the corresponding model values, the best one of the five models for this oil field was determined. Using the experimental data, one model with a better accuracy than the existing models was developed to calculate the viscosity of mixed oils. Another model was derived to predict the viscosity of mixed oils at different temperatures and different values of mixing ratio of light to heavy oil. (C) 2011 Elsevier Ltd. All rights reserved.Energy & FuelsEngineering, ChemicalSCI(E)EI0ARTICLE1431-4379
Viral pathogens among elderly people with acute respiratory infections in Shanghai, China: preliminary results from a laboratory-based surveillance, 2012-2015
No full textAcute respiratory infections (ARIs), with viral pathogens as the major contributors, are the most common illnesses worldwide, and increase the morbidity and mortality among the elderly population. The clinical and pathological features of elderly people with ARIs need to be identified for disease intervention. From January 1st , 2012 through December 31st , 2015, respiratory specimens from patients above 60 years old with ARIs were collected from the outpatient and inpatient settings of six sentinel hospitals in Pudong New Area. Each specimen was tested via multiplex polymerase chain reaction (PCR) for eight target viral etiologies including influenza, human rhinovirus (HRV), human para-influenza virus (PIV), adenovirus (ADV), respiratory syncytial virus (RSV), human metapneumovirus (hMPV), human coronavirus (hCoVs) and human bocavirus (hBoV). A total of 967 elderly patients with ARIs were enrolled, including 589 (60.91%) males, and the median age was 73 years old. 306 (31.64%) patients were tested positive for any one of the eight viruses, including 276 single infections and 30 co-infections. Influenza was the predominant virus (14.17%, 137/967), detected from 21.35% (76/356) of the outpatients and 9.98% (61/611) of the inpatients. Influenza infections presented two annual seasonal peaks during winter and summer. Compared with non-influenza patients, those with influenza were more likely to have fever, cough, sore throat and fatigue. This study identified influenza as the leading viral pathogen among elderly with ARIs, and two seasonal epidemic peaks were observed in Shanghai. An influenza vaccination strategy needs to be advocated for the elderly population
A design of a data base system for an academic department, 1984
No full textThis thesis describes the design of an on-line data base management system for an academic department. The implementation uses dBASE II to create a full information system containing student records, course listing, course scheduling, fiscal management, statistical data, faculty records, and inventory of textbooks and equipment. Application programs to maintain the data base are also included
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