Analysis of the applicability of the method for assessing the predicted maximum settlement of the surrounding building development in the engineering and geological conditions of St. Petersburg

The article considers the methods for calculating the predicted maximum settlement of buildings in the zone of influence of a deep pit in the conditions of St. Petersburg. There have been analyzed the results of calculations of the predicted maximum settlement by the semi-empirical method developed by Professor N. S. Nikiforova with the settlement values obtained in Plaxis 2D software package. The authors present the evaluation of the possibility of applying a semi-empirical method for determining the predicted settlement of the surrounding building development in the engineering and geological conditions of St. Petersburg.

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Engineering-Geological Studies Of The Territory, Soils Of Foundation And Foundations Of The Architectural Monument Of The "Melnikov’s House" In Moscow

Promyshlennoe i Grazhdanskoe Stroitel stvo ◽

10.33622/0869-7019.2019.05.41-51 ◽

2019 ◽

pp. 41-51

Keyword(s):

Working Condition ◽

Overlying Water ◽

North East ◽

The North ◽

Geological Processes ◽

Architectural Monument ◽

Geological Conditions ◽

Zone Of Influence ◽

Complex Engineering ◽

Building Engineering

On the basis of engineering and design surveys of the building, engineering-geological and geophysical studies of the soils of the territory conducted by the article authors, as well as with due regard for the results of studies conducted on this territory by other authors, the features of the foundations, soils of their foundation and engineering-geological conditions of the territory of the Melnikov House are established. It is shown that the Melnikov house is located under complex engineering-geological conditions on the territory of high geological risk, in the zone of influence of tectonic disturbance. To the North of the area there is a zone of intersection of the observed disturbance with a larger disturbance that can have an impact on geological processes. To the North-East of the site of the Melnikov House, a sharp immersion of the roof of carbon deposits was revealed. It promotes groundwater seepage into limestone of the carbonate strata from overlying water-bearing sands and activation of processes of suffusion removal and sinkhole phenomena of the soil. The surveyed area is assessed as potentially karst-hazardous and adjacent to it from the North-East territory as karst-dangerous. In this regard any construction on the adjacent territory can provoke activation of sinkhole phenomena on the surface. The foundations of the building are basically in working condition. Existing defects can be eliminated during repair. The foundation soils mainly have sufficient bearing capacity. Areas of the base with bulk soil can be reinforced. However, when developing a project for the reconstruction of the building and its territory, it should be taken into account that the design of the Melnikov House does not provide for its operation on the loads at the formation of sinkholes.

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Modeling the Effects of O-sulfonation on the CID of Serine

10.26434/chemrxiv.11783628.v2 ◽

2020 ◽

Author(s):

Kenneth Lucas ◽

George Barnes

Keyword(s):

Sulfo Group ◽

High Energy ◽

Empirical Method ◽

Side Chain ◽

Energy Structure ◽

Direct Dynamics ◽

Theoretical Mass ◽

Intermolecular Proton Transfer ◽

Dynamics Simulations ◽

Semi Empirical

We present the results of direct dynamics simulations and DFT calculations aimed at elucidating the effect of \textit{O}-sulfonation on the collision induced dissociation for serine. Towards this end, direct dynamics simulations of both serine and sulfoserine were performed at multiple collision energies and theoretical mass spectra obtained. Comparisons to experimental results are favorable for both systems. Peaks related to the sulfo group are identified and the reaction dynamics explored. In particular, three significant peaks (m\z 106, 88, and 81) seen in the theoretical mass spectrum directly related to the sulfo group are analyzed as well as major peaks shared by both systems. Our analysis shows that the m\z 106 peaks result from intramolecular rearrangements, intermolecular proton transfer among complexes composed of initial fragmentation products, and at high energy side-chain fragmentation. The \mz 88 peak was found to contain multiple constitutional isomers, including a previously unconsidered, low energy structure. It was also seen that the RM1 semi empirical method was not able to obtain all of the major peaks seen in experiment for sulfoserine. In contrast, PM6 did obtain all major experimental peaks.

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Theoretical investigation of Ramachandran plot of N-formyl-L-alanine-amide

10.31221/osf.io/8gbdp ◽

2019 ◽

Author(s):

Chem Int

Keyword(s):

Genetic Algorithm ◽

Theoretical Investigation ◽

Energy Analysis ◽

Empirical Method ◽

Conformational Space ◽

Ramachandran Plot ◽

Global Minima ◽

Reasonable Time ◽

Semi Empirical

The full conformational space of N-formyl-L-alanine-amide was explored by the semi-empirical method AM1 coupled to the Multi Niche Crowding (MNC) genetic algorithm implemented in a package of programs developed in our laboratory. The structural and energy analysis of the resulting conformational space E(,ψ) exhibits 5 regions or minima ɣL, ɣD, ɛL, D and αD. The technique provides better detection of local and global minima within a reasonable time.

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Radiation protection instrumentation. Semi-empirical method for performance evaluation of detection and radionuclide identification

10.3403/30320911u ◽

2017 ◽

Keyword(s):

Performance Evaluation ◽

Radiation Protection ◽

Empirical Method ◽

Semi Empirical

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Radiation protection instrumentation. Semi-empirical method for performance evaluation of detection and radionuclide identification

10.3403/30320911 ◽

2017 ◽

Keyword(s):

Performance Evaluation ◽

Radiation Protection ◽

Empirical Method ◽

Semi Empirical

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How Good Is the STW Sensor? An Account from a Larger Shipping Company

Journal of Marine Science and Engineering ◽

10.3390/jmse9050465 ◽

2021 ◽

Vol 9 (5) ◽

pp. 465

Author(s):

Angelos Ikonomakis ◽

Ulrik Dam Nielsen ◽

Klaus Kähler Holst ◽

Jesper Dietz ◽

Roberto Galeazzi

Keyword(s):

High Frequency ◽

Additional Data ◽

Empirical Method ◽

Influential Factor ◽

Sensor Data ◽

Sea State ◽

Shipping Company ◽

Frequency Sensor ◽

Semi Empirical

This paper examines the statistical properties and the quality of the speed through water (STW) measurement based on data extracted from almost 200 container ships of Maersk Line’s fleet for 3 years of operation. The analysis uses high-frequency sensor data along with additional data sources derived from external providers. The interest of the study has its background in the accuracy of STW measurement as the most important parameter in the assessment of a ship’s performance analysis. The paper contains a thorough analysis of the measurements assumed to be related with the STW error, along with a descriptive decomposition of the main variables by sea region including sea state, vessel class, vessel IMO number and manufacturer of the speed-log installed in each ship. The paper suggests a semi-empirical method using a threshold to identify potential error in a ship’s STW measurement. The study revealed that the sea region is the most influential factor for the STW accuracy and that 26% of the ships of the dataset’s fleet warrant further investigation.

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