1,120 research outputs found

    The Exploration of the Application and Management of Project Cost in Smart Buildings Using BIM Technology

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    In recent years, the slow development of engineering construction management in China has been attributed to outdated management models and low level of informatization. To address the deficiencies in project cost management, relevant departments have proposed the application of BIM technology. BIM technology encompasses a wide range of areas, including planning, construction processes, and cost management. It enables the simulation of these processes to create dynamic real-time building models. Additionally, BIM technology facilitates the rapid transmission of various information during the construction process, thereby improving the overall efficiency of the construction project. Information technology has become ubiquitous in people’s daily lives, and this foundation has led to the emergence of smart buildings. The operation and development of smart building projects require effective project cost management. Accurate cost estimation can help construction enterprises effectively control project costs and increase economic benefits. However, many companies still rely on traditional methods such as manual measurement based on drawings, bill of quantities, or engineering rates, which often lead to calculation errors. The application of BIM technology in project cost management can help alleviate this problem

    Research on touchdown performance of soft-landing system with flexible body

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    In the overall study of the design and performance of the lunar Lander, analysis of touchdown dynamics of the landing stage is an important part. In this paper, the influence of the lunar Lander’s body deformation on the landing performance is studied. First, the equations with the flexible part are derived from the subsystem method and deducing a multi-mass model by comparing and analyzing the mode of the body in Lander. Second, based on the existing aluminum honeycomb buffering and the model used in the landing-impact tests for the soft-landing system, a finite element model for the cantilever-type landing gear with four legs is established in MSC.Patran and submitted to MSC.Dytran to conduct a simulation analysis. Finally, the flexibility of lander’s body to the performance in landing is studied. Results show that the deformation of the body has considerable effect on the overloading of the lunar Lander system though the deforming can absorb litter energy during landing

    The influence of non-financial compensation on attitude towards the job of support staff : comparison between public and private sector

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    Thi study aims to identify the influence of non-financial compensation on attitude towards the job of support staff. A comparison between public and private sector has been made in order to clearly identify its influence on job attitude. Simple Random Sampling method was used to identify the number of sample for this study. There are 37 respondents gathered from the public sector (JKR), while 35 respondents from the private sector (CMSB). A set of questionnaires were distributed to the respondents in data collection process. This study consists of six hypothesis and was analyzed using Inference and Descriptive Statistic to determine the relationship between the variables and the dominant factor influencing job attitude. The dependent variable is attitude towards the job, while the independent variables are recognition, advancement opportunities, comfortable working conditions and competent supervisor. The findings of this study revealed that all of the independent variables have a significant relationship on the dependent variable. In other words, all of the selected nonfinancial compensation elements have influence on the job attitude of the SHpport staff in both organizations. This study also shows that none of the respondents rated themselves as having low attitude towards their job. Advancement opportunities were found to be the dominant factor in influencing the job attitude of at lKR. Meanwhile, competent supervisor was the dominant factor in CMSB. Hence, both organizations should take into consideration all of the elements in this study as they have been proved to have significant influence on attitude towards the job

    Beliefs about medicines and non-adherence in patients with stroke, diabetes mellitus and rheumatoid arthritis: a cross-sectional study in China

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    OBJECTIVES: To investigate beliefs about medicines and their association with medicine adherence in patients with chronic diseases in China. DESIGN: A cross-sectional questionnaire-based study SETTING: Two large urban hospitals in Hefei and Tianjin, China PARTICIPANTS: Hospital inpatients (313 stroke patients) and outpatients (315 diabetic patients and 339 rheumatoid arthritis (RA) patients) were recruited between January 2014 and September 2014. OUTCOME MEASURES: The Beliefs about Medicines Questionnaire (BMQ), assessing patients' beliefs about the specific medicine (Specific-Necessity and Specific-Concerns) prescribed for their conditions (stroke/diabetes/RA) and more general background beliefs about pharmaceuticals as a class of treatment (BMQ-General Benefit, Harm and Overuse); the Perceived Sensitivity to Medicines scale (PSM) assessed patients' beliefs about how sensitive they were to the effects of medicines and the Medication Adherence Report Scale. The association between non-adherence and beliefs about medicines was assessed using a logistic regression model. RESULTS: Patients with diabetes mellitus had a stronger perceived need for treatment (mean (SD) Specific-Necessity score, 3.75 (0.40)) than patients with stroke (3.69 (0.53)) and RA (3.66 (0.44)) (p=0.049). Moderate correlations were observed between Specific-Concerns and General-Overuse, General-Harm and PSM (Pearson correlation coefficients, 0.39, 0.49 and 0.49, respectively, p<0.01). Three hundred and eleven patients were non-adherent to their medicine (159 (51.0%) in the stroke group, 60 (26.7%) in the diabetes mellitus group and 62 (19.8%) in the RA group, p<0.01). Across the whole sample, after adjusting for demographic characteristics, non-adherence was associated with patients who had higher concerns about their medicines (OR, 1.35, 95% CI 1.07 to 1.71) and patients who believed that they were personally sensitive to the effects of medications (OR 1.44, 95% CI 1.16 to 1.85). CONCLUSION: The BMQ is a useful tool to identify patients at risk of non-adherence. In the future, adherence intervention studies may use the BMQ to screen for patients who are at risk of non-adherence and to map interventional support

    Performance of high strength structural bolts in tension: effects of tolerance classes

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    Structural bolts have been manufactured for building construction for hundreds of years. In practice, failure of high strength structural bolts might be caused by their tolerance classes or coating procedures, which may weaken their internal or external threads. However, this research work is dedicated to understanding a bit more on bolt performance in tension, accounting for effects of tolerance classes in the applied numerical simulation for assessment of performance of structural bolts subjected to tensile loading. In addition, different constitutive relationships has also been taken into account in the numerical analysis in use of both implicit and explicit methods. The observed simulation results demonstrated two failure mechanisms for structural bolts, threads stripping and bolt shank failure, which has proved to be associated with their tolerance classes and coating procedures applied. As a result of this, carefully selecting bolts and nuts is a deliberate solution in preventing the premature failure (threads stripping) in bolted connections for performance-based steel construction

    Down-regulated miR-9 and miR-433 in human gastric carcinoma

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    <p>Abstract</p> <p>Background</p> <p>MircoRNAs(miRNAs) are short, endogenously non-coding RNAs. The abnormal expression of miRNAs may be valuable for the diagnosis and treatment of tumors.</p> <p>Methods</p> <p>To screening the special miRNAs in gastric carcinoma, expression level of miRNAs in gastric carcinoma and normal gaster samples were detected by miRNA gene chip. Then, the expressions of miR-9 and miR-433 in gastric carcinoma tissue and SGC7901 cell line were validated by qRT-PCR. GRB2 and RAB34, targets of miR-433 and miR-9 respectively, were detected by Western blot.</p> <p>Results</p> <p>We found 19 miRNAs and 7 miRNAs were down-regulated and up-regulated respectively. Compared with normal gaster samples, our data showed that miR-9 and miR-433 were down-regulated in gastric carcinoma. Meanwhile, we also found that miR-433 and miR-9 regulated the expression levels of GRB2 and RAB34 respectively.</p> <p>Conclusion</p> <p>Our data show miR-9 and miR-433 was down-regulated in gastric carcinoma. The targets of miR-433 and miR-9 were tumor-associated proteins GRB2 and RAB34 respectively. This result provided the related information of miRNAs in gastric carcinoma.</p

    Experimental Investigation on Residual Stresses in Welded Medium-Walled I-shaped Sections Fabricated from Q460GJ Structural Steel Plates

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    GJ steel is a new type of high-performance structural steel which has been increasingly adopted in practical engineering. Q460GJ structural steel has a nominal yield strength of 460 MPa, which does not decrease significantly with the increase of steel plate thickness like normal structural steel. Thus, Q460GJ structural steel is normally used in medium-walled welded sections. However, research works on the residual stress in GJ steel members are few though it is one of the vital factors that can affect the member and structural behavior. This article aims to investigate the residual stresses in welded I-shaped sections fabricated from Q460GJ structural steel plates by experimental tests. A total of four full scale welded medium-walled I-shaped sections were tested by sectioning method. Both circular curve correction method and straightening measurement method were adopted in this study to obtain the final magnitude and distribution of the longitudinal residual stresses. In addition, this paper also explores the interaction between flanges and webs. And based on the statistical evaluation of the experimental data, a multilayer residual stress model is proposed
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