نتایج جستجو برای: عملکرد tbm

تعداد نتایج: 101273  

یکی از مسایل مهم در حفاری مکانیزه، پیش‌بینی نرخ پیشروی (Advance Rate) است. شـناخت عوامل تاثیرگذار بر بهره‌وری از این نظر حایز اهمیت اسـت که به وسیله‌ی آن می‌توان تخمین دقیق‌تری از زمان‌های توقف و حفاری و در نتیجه هزینه‌های اجرایی به دست آورد. مدل‌های زیادی برای پیش‌بینی عملکرد TBM توسعه یافته‌اند که بسیاری از آن‌ها تنها مدلی برای پیش‌بینی نرخ نفوذ بوده است. در این مقاله با استفاده از رویکرد سیس...

Journal: :Applied sciences 2023

To explore the influences of microwave irradiation on rock-breaking efficiency tunnel boring machine (TBM) cutters, a multimode cavity with power 2100 W was used to conduct tests Chifeng basalt for different durations. A combined abrasion test device reduced-scale SP3-I TBM cutter adopted wear and samples before after irradiation. Influences loss cutter, rock removal, cutting force, specific en...

ژورنال: :مهندسی تونل و فضاهای زیرزمینی 2013
امید فروغ سید رحمان ترابی فرهنگ سرشکی سید محمد اسماعیل جلالی

یکی از مسایل مهم در حفاری مکانیزه، پیش بینی نرخ پیشروی (advance rate) است. شـناخت عوامل تاثیرگذار بر بهره وری از این نظر حایز اهمیت اسـت که به وسیله ی آن می توان تخمین دقیق تری از زمان های توقف و حفاری و در نتیجه هزینه های اجرایی به دست آورد. مدل های زیادی برای پیش بینی عملکرد tbm توسعه یافته اند که بسیاری از آن ها تنها مدلی برای پیش بینی نرخ نفوذ بوده است. در این مقاله با استفاده از رویکرد سیس...

2005
G. Swinnen J. W. Thorbecke G. G. Drijkoningen

Seismic monitoring from the head of a tunnel-boring machine (TBM) enables improved assessment of the risks associated with the tunnel-boring process. The monitoring system provides a live image of ground conditions along the trajectory followed by the TBM and detects local heterogeneities such as boulders, foundations, and other obstacles that commonly pass undetected using local geotechnical t...

2017
Guillaume Michel Pauline Blery Michaël Henoux Jérôme Guicheux Pierre Weiss Sophie Brouard Olivier Malard Florent Espitalier

Mandibular osteoradionecrosis is a severe side effect of radiotherapy after the treatment of squamous cell carcinomas of the upper aerodigestive tract. As an alternative to its treatment by micro-anastomosed free-flaps, preclinical tissular engineering studies have been developed. Total bone marrow (TBM) associated with biphasic calcium phosphate (BCP) significantly enhanced bone formation in i...

Journal: :Latin American Journal of Aquatic Research 2021

This study aimed to evaluate the apparent digestibility coefficients (ADCs) of dry matter, crude protein, gross energy, and minerals marine fish meal (MFM), salmon (SM), tilapia by-product (TBM), meat bone (MBM), poultry (PBM), blood (BM), feather (FM) by silver catfish Rhamdia voulezi. Groups 12 were fed experimental diet three times a day until satiation, fecal samples collected from an accum...

1999
Philippe SMETS

We show how the transferable belief model (TBM) can be used to assess and to combine expert opinions. The transferable belief model has the advantage that it can handle weighted opinions and their aggregation without the introduction of any ad hoc methods. We also study a paradigm in reliability analysis. It shows that the TBM analysis leads to a solution diametrically opposed to the Bayesian s...

ABDOLNASSER RAFI, BABAK BABAN,

In view of the importance of early diagnosis of tuberculous meningitis (TBM), the efficiency of the polymerase chain reaction (PCR), one of the most reliable and sensitive DNA-based assays, was compared with conventional methods (acid-fast microscopy and culture) for the detection of M. tuberculosis in cerebrospinal fluid (CSF) specimens from patients suspected of TBM. Of the 29 CSF specim...

2008
Kui Lu Binh Quach Pak Kwong Chung Tom K. Tong

We compared the optimal workload of Wingate test (WAnT), which was assigned according to total body mass (TBM), between two groups of eight young male adults. The leg anaerobic power and fat free mass of these two groups were comparable while their percent body fat was either within (NOR) or above normal range (OF). The optimal WAnT workload was derived individually from the polynomial regressi...

Journal: :The European respiratory journal 2012
K-H Park O-H Cho E M Lee S-O Lee S-H Choi Y S Kim J H Woo J K Kang S-A Lee S-H Kim

Recently, two studies have shown that an ELISPOT assay using mononuclear cells (MCs) compartmentalised in the cerebrospinal fluid (CSF) is an accurate and rapid rule-out or rule-in test for tuberculosis meningitis (TBM) in conjunction with other rapid tests [1, 2]. However, these two studies had limitations: the majority (94%) of enrolled patients were infected with HIV in one study [2], and th...

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