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特区经济 2009年第10期 280-281页

作者：王瑟邝国良华南理工大学经济与贸易学院广东广州510006

我国外向型产业集群的大量兴起是近年来我国经济发展的一个明显特征。外资企业的进入为本地企业技术升级提供了良好的条件,但也会导致诸多风险。本文尝试对此进行分析,从而使这种产业集群模式更好地促进我国经济发展。

关键词：外向型产业集群技术升级

立体结构和行动实践——费孝通“差序格局”理论新解

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中央民族大学学报（哲学社会科学版） 2016年第1期43卷 29-36页

作者：孟凡行色音天津工业大学天津300387 中国社会科学院北京100081

费孝通先生早年提出的"差序格局"是一个极富学术创造力和生命力的本土学术概念和理论。后来的学者对这个理论进行了大量研究,取得了可观的成果。但不少学者把"差序格局"理解为平面结构的,表述社会关系和人际关系的理论,降低了这一表述... 详细信息

费孝通先生早年提出的"差序格局"是一个极富学术创造力和生命力的本土学术概念和理论。后来的学者对这个理论进行了大量研究,取得了可观的成果。但不少学者把"差序格局"理解为平面结构的,表述社会关系和人际关系的理论,降低了这一表述社会结构的概念和理论的格调,也大大缩小了其内涵。"差序格局"可能是一个由横向的"差"和纵向的"序"交叉构成的立体多维的理论分析框架,这个框架大体包括"差序格局"的立体结构和人的行动实践两个方面,具有丰富的理论内涵,有待进一步挖掘和深入研究。

关键词：费孝通 “差序格局” 社会结构社会圈子行动实践

Mechanical Behaviour of Composite Bioactive Bone Cements Consisting of Two Different Types of surface Treated Hydroxyapatite as Filler

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Journal of Wuhan University of Technology(Materials science) 2005年第B12期20卷 10-12页

作者： s Deb JA Roether Department of Biomaterials King's College London School of Dentistry at the Guy's King's & St Thomas Hospital Guy's Tower Guy's Hospital London Bridge London SE 1 9RT UK

Bioactive bone cements based on a paste-paste system for orthopaedic applications were developed consisting of hydroxyapatite （ HA ） filler panicles in a methacrylate matrix comprising urethane dimethacrylate （ UDMA ） and triethylene glycol dimethacrylate （ TEGDMA ）. To improve the interface between inorganic filler and organic matrix the HA panicles were subjected to two different surface treatment methods, using polyacrylic acid （PAA） and γ-methacryloxy propyl trimethoxy silane （γMPs）. The aim of the present study was to determine the influence of surface treatment and the inclusion of multifunctional methacrylates on the mechanical properties, namely 3-point flexural strength （Fs） and fracture toughness of the cements and the effect of ageing in simulated body fluid. Comparing the mechanical properties of the two cements, the γMPs- HA cement showed that the fracture toughness of the experimental bone cements were significantly greater （ p 〈 0.001） compared to that of the PMMA cement, whereas PAA-HA containing cement had strength vollues around 20% lower. Interestingly, PAA was found to be more effective in improving the interface as the PAA treated HA cement （ UTHAPPA ） maintained its strength on immersion in sBF, suggesting that PAA provided a coupling, which was less sensitive to moisture, a similar trend was also observed with the inclusion of the carboxyl containing multifunctional methacrylates.

关键词： bioactive bone cements coupling agents composites polyacrylic acid

Is cholecystectomy a reasonable treatment option for simple gallbladder polyps larger than 10 mm?

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World Journal of Gastroenterology 2015年第14期21卷 4248-4254页

作者： Hye Yon Park se Hoon Oh Kwang Hyuck Lee Jong Kyun Lee Kyu Taek Lee Division of Gastroenterology Department of Internal MedicineSamsung medical centerSungkyunkwan University School of Medicine

AIM: To determine the relevance of the 10-mm size criterion of the generally accepted surgical indication for gallbladder polyps(GBPs).METHODs: We collected data of patients who were confirmed to have GBPs through cholecystectomy at samsung Medical Center between January 1997 andDecember *** the patients who underwent cholecystectomy for GBP, those with a definite evidence for malignancy such as adjacent organ invasion, metastasis on preoperative imaging studies, polyp larger than 20 mm, absence of preoperative imaging study results, and patients having gallstones were *** retrospectively collected and analyzed information on patient's clinical characteristics, symptoms, ultrasonographic findings, and blood laboratory ***: A total of 836 patients who had undergone cholecystectomy were retrospectively *** hundred eighty patients(93%) had benign polyps, whereas 56 patients(7%) had malignant *** the 56 patients with malignancy, 4 patients(7%) had borderline GBP(10-12 mm) and a patient had small GBP(sis to verify the 10-mm size criteria(AUC = 0.887, sD = 0.21, P size and malignancy, sensitivity and specificity of the 10-mm size criterion was 98.2% and 19.6%, *** specificity of the 11-mm and 12-mm size criteria was 44.6% and 56%, respectively, whereas the sensitivity of these two size criteria was *** defined the GBPs of 10 to 12 mm as a borderline-sized GBP, which were found in 411 patients(49%).In this group, there was a significant difference in age between patients with benign and malignant GBPs(47 years vs 60 years, P sION: GBPs larger than 13 mm need immediate excision whereas for borderline-sized GBPs detected in young patients, careful medical observation can be a rational decision.

关键词： Gallbladder polyp Gallbladder cancer Cholecystecto

Appendiceal Crohn's disease clinically presenting as acute appendicitis

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World Journal of Clinical Cases 2014年第12期2卷 888-892页

作者： Hulin Han Hyunsung Kim Abdul Rehman se Min Jang seung sam Paik Department of Pathology College of Medicine Hanyang University Seoul 133-792 South Korea

AIM: To determine the incidence of appendiceal Crohn's disease(CD) and to summarize the characteristic histologic features of appendiceal ***: We reviewed the pathology files of 2179 appendectomy specimens from January 2007 to May2013. The computer-assisted retrieval search facility was utilized to collect specimens. We selected those cases that were diagnosed as CD or chronic granulomatous inflammation and defined the final diagnosis according to the histologic findings of CD, including transmural lymphocytic inflammation, non-caseating epithelioid granulomas, thickening of the appendiceal wall secondary to hypertrophy of muscularis mucosa,mucosal ulceration with crypt abscesses, mucosal fissures, and fistula formation. REsULTs: We found 12 cases(7 male and 5 female patients, with an average age of 29.8 years) of appendiceal CD. The incidence of appendiceal CD was 0.55%.The chief complaints were right lower quadrant pain,abdominal pain, lower abdominal pain, and *** duration of symptom varied from 2 d to 5 *** histologic review revealed appendiceal wall thickening in 11 cases(92%), transmural inflammation in all cases(100%), lymphoid aggregates in all cases(100%), epithelioid granulomas in all cases(100%), mucosal ulceration in 11 cases(92%), crypt abscesses in 5 cases(42%), perforation in 2 cases(17%), muscular hypertrophy in 1 case(8%), neural hyperplasia in 5 cases(42%), and perpendicular serosal fibrosis in 8 cases(67%).CONCLUsION: A typical and protracted clinical course, unusual gross features of the appendix and the characteristic histologic features are a clue in the diagnosis of appendiceal CD.

关键词： Appendix Appendectomy Acute appendicitis Crohn’s disease Prognosis

胸腺肽α1治疗高龄患者消化系统肿瘤的临床疗效分析

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解放军医学杂志 2008年第3期33卷 325-326页

作者：石卉万军解放军总医院南楼消化科北京100853

目的观察及评价胸腺肽α1(Tα1)对高龄消化系统恶性肿瘤患者细胞免疫功能的影响和临床疗效。方法96例高龄消化系统恶性肿瘤患者,随机分为对照组(化疗)和治疗组(化疗+Tα1),每组48例。治疗组在化疗的同时给予1.6mg Tα1皮下注射,隔日1次... 详细信息

目的观察及评价胸腺肽α1(Tα1)对高龄消化系统恶性肿瘤患者细胞免疫功能的影响和临床疗效。方法96例高龄消化系统恶性肿瘤患者,随机分为对照组(化疗)和治疗组(化疗+Tα1),每组48例。治疗组在化疗的同时给予1.6mg Tα1皮下注射,隔日1次,连续应用8周,对照组则在化疗的同时给予等剂量生理盐水,用法与治疗组相同。在化疗前1周和化疗第2、4、8周分别检测患者T淋巴细胞亚群及NK淋巴细胞活性,并记录患者Karnofsky体力评分。结果治疗后治疗组患者的Karnofsky评分明显高于对照组(P<0.05)。治疗组机体免疫能力相关指标CD4+、CD4+/CD8+和NK细胞活性在治疗后明显高于治疗前,差异有显著性(P<0.05)。治疗后治疗组CD4+、CD4+/CD8+和NK细胞活性明显高于对照组,差异有显著性(P<0.05)。结论胸腺肽α1可提高高龄消化系统恶性肿瘤患者的细胞免疫功能,改善患者生活质量,对消化系统恶性肿瘤有一定的辅助治疗作用。

关键词：胸腺肽α1 消化系统肿瘤老年人免疫活性生活质量

Nano sized Copper selenide Thin Film Pre-Cursor by A Liquid Phase Chemical Growth Process

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稀有金属材料与工程 2012年第S1期41卷 24-27页

作者： Deshmukh L P Deshmukh s K Thin Film and solar studies Research Laboratory Department of PhysicsSolapur UniversitySolapur-413 255M.S.India

The deposition of copper selenide(Cuse)thin films was carried out using liquid phase chemical bath deposition process at the optimized growth parameters as:60℃deposition temperature,90 minutes deposition time,pH equal to 10.5±0.1 and 72±2 r/min speed of mechanical *** as-grown deposits exhibited excellent uniformity and physical adherency with the substrate surface and are smooth and diffusely reflecting with colour changing from yellowish orange to dark chocolate during *** layer is of the order of 300 nm *** EDs analysis technique gave film composition to be nearly stoichiometric(Cu=47.89%,se=52.11%).An X-ray diffraction analysis showed Cuse to be polycrystalline hexagonal with a good match of d-values and intensities of *** crystallite size is in the nanorange(50-60 nm).The as-deposited Cuse exhibited a high coefficient of absorption(α=105cm-1)with a direct optical band gap of 1.81 *** to other chalcogenides,Cuse films exhibit low resistance;room temperature electrical resistivity being 1.55×103?*** electrical conductivity decreased with increase in temperature up to 473 K;showing totally unusual behaviour from that of the semiconducting *** thermo probe measurements showed n-type conduction of the samples.

关键词： LPCBD solar absorber Cu-deficient hexagonal metal like behaviour direct transition

Positron Energy Levels in Cd-Based semiconductors

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Communications in Theoretical Physics 2013年第6期59卷 756-762页

作者： B.Abbar s.Mécabih s.Amari N.Benosman B.Bouhafs Laboratoire de Modélisation et de simulation en sciences des Département de Physique Université Djillali Liabès

Using the full potential linearized augmented plane wave FP-LAPW method within local density ap-proximation LDA, we have studied positron diffusion and surface emission in Cd-based semiconductors. This requires the calculation of electron and positron band structures. In the absence of experimental and theoretical data for CdX (X=s,se,Te) we have treated the si, which has been studied by several authors, as a test case. Predictive results on positron effective masses, deformation potentials, positron work functions, diffusion constants and positron mobilities are presented for CdX (X=s, se, Te). Our calculated data for si are compared with experimental and recent theoretical results.

关键词： DFT FP-LAPW semiconductors positron diffusion

Nursing Theory and Its Practices in Two Health Care Facilities of Bujumbura

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Open Journal of Nursing 2021年第9期11卷 757-771页

作者： Emmanuel Gasaba Bosco Ntiranyibagira Iranyishuye Joseph Thérèse Uwamariya Emmanuel Nkurikiye Pierre Hategekimana Emmanuel Ndarusanze Edouard Niyongabo Faculty of Health sciences Hope Africa University Bujumbura Burundi Hope Africa University Bujumbura Burundi Department of Public Health sciences National Institute of Public Health Bujumbura Burundi

Introduction: Nursing theory provides a systematic explanation and description of nursing phenomena. It is very important during nursing practice in healthcare facilities (HCFs) because it guides nurses on how to coll... 详细信息

strong>Introduction:strong> Nursing theory provides a systematic explanation and description of nursing phenomena. It is very important during nursing practice in healthcare facilities (HCFs) because it guides nurses on how to collect data, which data to collect, decide how to interpret the data through the perspective of the theorist, how to plan and implement care, how to make a change and how to evaluate the patient’s outcomes. This study aims to illustrate how nursing theory can be applied during the implementation of nursing care in HCFs of Burundi by orienting the nurses to understand its application during practice. strong>Methods: strong>A cross-sectional study design was used to assess the use of nursing theories in healthcare facilities. A purposive sampling method was used also to select 81 nurses working full and part by applying Alain Bouchard’s formula and the questionnaire was used as the data collection instrument. strong>Results:strong> The current study had revealed a poor knowledge among the participants on the use of nursing theory in these two HCFs as for all variables, their average scores were almost 24.1% whilst those who had no notion related to nursing theory reach a percentage of 75.9%. strong>Conclusion: strong>The study findings were slightly poor as for all variables, they scored less than 40%. Therefore, the use of theories to guide their practice was highly recommended to enhance the patients’ outcomes based on the use of scientific-based experts which could result from continuous education.

关键词： Nursing Nursing Theory Nursing Practice Healthcare Facilities (HCFs)

FINITE DIFFERENCE METHODs FOR THE HEAT EQUATION WITH A NONLOCAL BOUNDARY CONDITION

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Journal of Computational Mathematics 2015年第1期33卷 17-32页

作者： V. Thomee A.s. Vasudeva Murthy Mathematical sciences Chalmers University of Technology and University of Gothenburg SE-412 96 GSteborg Sweden TIFR Centre for Appl. Math Yelahanka New Town Bangalore India

We consider the numerical solution by finite difference methods of the heat equation in one space dimension, with a nonlocal integral boundary condition, resulting from the truncation to a finite interval of the problem on a semi-infinite interval. We first analyze the forward Euler method, and then the 0-method for 0 〈 θ ≤ 1, in both cases in maximum-norm, showing O（h2 ＋ k） error bounds, where h is the mesh-width and k the time step. We then give an alternative analysis for the case θ= 1/2, the Crank-Nicolson method, using energy arguments, yielding a O（h2 ＋ k3/2） error bound. special attention is given the approximation of the boundary integral operator. Our results are illustrated by numerical examples.

关键词： Heat equation Artificial boundary conditions unbounded domains productquadrature.