scholarly journals Underground Structure Inspection in Geological Groundwater Environment Base on Geologic Radar Technology

2021 ◽  
Vol 236 ◽  
pp. 01046
Author(s):  
Yu Wang ◽  
Zongying Shu ◽  
Tianrong Huang ◽  
Yongyu Li ◽  
Shihua Wang
Keyword(s):  
Underground Structure ◽  
Treatment Method ◽  
Control Effect ◽  
Groundwater Environment ◽  
Concrete Layer ◽  
Concrete Quality ◽  
Void Shape ◽  
Pixel Value ◽  
Correct Application ◽  
Considerable Complexity

How to accurately detect the anti-slide pile and the surrounding rock hole is the key to the correct application of the concrete quality treatment method, at the same time, it can ensure the control effect to a certain extent, and make the treatment project more economical and effective. The presence of water in the reinforced concrete layer, coupled with the void shape, and the irregular nature of the water in the hole, may be filled with air, mud, soil and other media factors, so there is considerable complexity. The number of abnormal bodies in the contrast enhancement diagram increases significantly, which is helpful for us to observe the loose area of anti-slide pile. We can find the pixel value corresponding to the feature by detecting the abnormal data of the pile one by one.

Numerical Analysis of the Impact of Intensive Underground Structures on Groundwater Flow in Guangzhou (Canton), China

2014 ◽  
Vol 501-504 ◽  
pp. 1832-1845
Author(s):  
Guanyong Luo ◽  
Hong Cao ◽  
Hong Pan
Keyword(s):  
Groundwater Flow ◽  
Underground Structure ◽  
Hydraulic Head ◽  
Underground Structures ◽  
Groundwater Balance ◽  
Darcy Velocity ◽  
Groundwater Environment ◽  
Structure Density ◽  
The Impact ◽  
The City

The soil over the bedrock in the city of Guangzhou is thin, with a depth of only about 11 m. Under such conditions, excessive exploitation of the underground space is very likely to affect the groundwater environment. In this paper, the impact of intensive underground structures, which act as barriers, on the groundwater flow in Guangzhou is investigated. The emphasis is on the impacts in terms of hydraulic head, Darcy velocity and groundwater balance. The study finds that: (1) Under the current underground structure density, the impact on the hydraulic head is small, and most of the change is in the range of ±0.5 m. (2) The Darcy velocity appears to be more susceptible to being affected by the structures. (3) The barrier effect of the intensive structures increases the overflow at the foot of the hills and reduces the transmissivity of the aquifer.

scholarly journals Effect of renal denervation on long-term outcomes in patients with resistant hypertension

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Bo Liang ◽  
Yi Liang ◽  
Rui Li ◽  
Ning Gu
Keyword(s):  
Blood Pressure ◽  
Resistant Hypertension ◽  
Renal Denervation ◽  
Pressure Control ◽  
Treatment Method ◽  
Control Effect ◽  
First Choice ◽  
Long Term Follow Up

AbstractIncreasing studies strongly prove that renal denervation, a minimally invasive surgery, is a promising new non-drug treatment method that can effectively control blood pressure in patients with resistant hypertension, but the evaluation of the long-term blood pressure control effect of renal denervation for resistant hypertension is still lacking. Here, we critically review current long-term follow-up data about the use of renal denervation for RH to comprehensively evaluate the effectiveness of renal denervation for RH, and to provide practical guidance for practitioners who are establishing a renal denervation service. Limited by the current research, many problems need to be solved before renal denervation is applied to RH. In addition, ambulatory blood pressure should be the first choice for the evaluation of blood pressure. Finally, the continuous antihypertensive effect of renal denervation in different renal denervation systems also needs to be strictly compared.

scholarly journals Application of a Sclerometer to the Preliminary Assessment of Concrete Quality in Structures After Fire

2018 ◽  
Vol 64 (4) ◽  
pp. 171-186 ◽  
Author(s):  
R. Kowalski ◽  
J. Wróblewska
Keyword(s):  
Compressive Strength ◽  
Cross Section ◽  
Heated Surface ◽  
Thermal Inertia ◽  
Reinforced Concrete Beams ◽  
Preliminary Assessment ◽  
Concrete Layer ◽  
Concrete Quality ◽  
Rebound Number ◽  
High Thermal Inertia

Abstract The paper presents a description and results of a study focused on the applicability of the sclerometric method to the preliminary assessment of concrete quality in structures after fire. Due to the high thermal inertia, concrete has non-uniform properties in the heated element cross-section. The greatest reduction of concrete compressive strength occurs on the heated surface. When assessing a structure after a fire, it is particularly important to determine the thickness of the damaged external concrete layer. Reinforced concrete beams exposed to high temperature on one side (a one-way heat transfer in the cross-section) for 0 (unheated element), 60, 120, 180 and 240 minutes were examined. A significant decrease of the rebound number on the elements heated surface was observed, depending on the heating duration. The obtained values of the relative rebound number reduction were comparable to the values of relative compressive strength decrease (determined on the basis of temperature) of concrete situated 15 mm from the heated surface.

EELS characterization of “Smut” layer films on steel surface prepared for chrome plating by anodic etching

1995 ◽  
Vol 53 ◽  
pp. 538-539
Author(s):  
E Y. Wang ◽  
J. T. Cherian ◽  
A. Madsen ◽  
R. M. Fisher
Keyword(s):  
Steel Surface ◽  
Surface Preparation ◽  
Treatment Method ◽  
Chrome Plating ◽  
Transmission Electron ◽  
Alloy Steels ◽  
Pre Treatment ◽  
Hard Chrome ◽  
Electron Energy Loss

Many steel parts are electro-plated with chromium to protect them against corrosion and to improve their wear-resistance. Good adhesion of the chrome plate to the steel surface, which is essential for long term durability of the part, is extremely dependent on surface preparation prior to plating. Recently, McDonnell Douglas developed a new pre-treatment method for chrome plating in which the steel is anodically etched in a sulfuric acid and hydrofluoric acid solution. On carbon steel surfaces, this anodic pre-treatment produces a dark, loosely adhering material that is commonly called the “smut” layer. On stainless steels and nickel alloys, the surface is only darkened by the anodic pre-treatment and little residue is produced. Anodic pre-treatment prior to hard chrome plating results in much better adherence to both carbon and alloy steels.We have characterized the anodic pre-treated steel surface and the resulting “smut” layer using various techniques including electron spectroscopy for chemical analysis (ESCA) on bulk samples and transmission electron microscopy (TEM) and electron energy-loss spectroscopy (EELS) on stripped films.

Continuous Positive Airway Pressure (CPAP) Therapy for the Treatment of Hypernasality: A Single Case Study

2014 ◽  
Vol 24 (2) ◽  
pp. 48-58 ◽  
Author(s):  
Lakshmi Kollara ◽  
Graham Schenck ◽  
Jamie Perry
Keyword(s):  
Continuous Positive Airway Pressure ◽  
Airway Pressure ◽  
Positive Airway Pressure ◽  
Single Case ◽  
Treatment Method ◽  
Post Treatment ◽  
Subjective Perception ◽  
Cpap Therapy ◽  
Long Term Follow Up

Studies have investigated the applications of Continuous Positive Airway Pressure (CPAP) therapy in the treatment of hypernasality due to velopharyngeal dysfunction (VPD; Cahill et al., 2004; Kuehn, 1991; Kuehn, Moon, & Folkins, 1993; Kuehn et al., 2002). The purpose of this study was to examine the effectiveness of CPAP therapy to reduce hypernasality in a female subject, post-traumatic brain injury (TBI) and pharyngeal flap, who presented with signs of VPD including persistent hypernasality. Improvements in mean velopharyngeal orifice size, subjective perception of hypernasality, and overall intelligibility were observed from the baseline to 8-week post-treatment assessment intervals. Additional long-term assessments completed at 2, 3, and 4 months post-treatment indicated decreases in immediate post-treatment improvements. Results from the present study suggest that CPAP is a safe, non-invasive, and relatively conservative treatment method for reduction of hypernasality in selected patients with TBI. More stringent long-term follow up may indicate the need for repeated CPAP treatment to maintain results.

Surgical treatment of transmissible venereal tumor (sticker sarcoma)

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Bougherara Hithem ◽  
Boukhechem Saïd ◽  
Aguezlane Abdelaziz ◽  
Benelhadj Khouloud ◽  
Aissi Adel
Keyword(s):  
Surgical Treatment ◽  
Cancer Cells ◽  
Treatment Method ◽  
High Rate ◽  
Surgical Removal ◽  
Characteristic Appearance ◽  
Recurrent Tumors ◽  
External Genital Organs

Background: Sticker sarcoma, also called venereal sarcoma or venereal lymphosarcomatosis, is a tumor of the external genital organs in females and males. In male animals the penis and foreskin (prepuce) are affected, in the female, it happens in vagina (vagina) and labia (vulva). The diagnosis of sticker sarcoma is based on the chronic discharge, the typical locations and the characteristic appearance of the tumor. Methods: We have relied on the treatment method on the complete surgical removal of all cancer cells that we can access. Results: After surgery, we notice recurrent tumors about six months after surgical treatment, indicating the need for other treatments in addition to surgery. Conclusion: Although spontaneous regressions of sticker sarcoma are documented (with permanent immunity), chemotherapy is the treatment of choice today. Irradiation should also be effective. If the tumor is only removed surgically, there is a high rate of recurrence, and this is what happened with the case that we treated, as the tumor reappeared after less than six months.

PROPOSALS FOR THE CONSTRUCTION OF THE ELEMENTS OF THE RADIATING UNDERGROUND STRUCTURE OF ANTENNAS OF THE STATIONARY COMPLEXES OF HF-RADIO COMMUNICA-TIONS

2019 ◽  
Vol 41 ◽  
pp. 42-52
Author(s):  
V. A. Kochetkov ◽  
◽  
N. Yu. Klyuchko ◽  
I. V. Hanarin ◽  
D. Yu. Sheyanov ◽  
...  
Keyword(s):  
Underground Structure
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