Rational selection of single oxide sorbents for syngas desulfurization regenerable at reduced temperature: Thermochemical calculations and experimental study

Fuel ◽  
2014 ◽  
Vol 128 ◽  
pp. 220-230 ◽  
Author(s):  
Vincent Girard ◽  
Arnaud Baudot ◽  
David Chiche ◽  
Delphine Bazer-Bachi ◽  
Christine Bounie ◽  
...  
Keyword(s):  
Experimental Study ◽  
Rational Selection ◽  
Reduced Temperature ◽  
Selection Of

scholarly journals Experimental investigation of structural and operational factor effects on speed performance of wave cleaving catamarans

2021 ◽  
pp. 13-19
Author(s):  
А.В. Сверчков ◽  
Г.Б. Крыжевич ◽  
А.Ю. Правдин
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Flow Resistance ◽  
Travel Speed ◽  
Rational Selection ◽  
Speed Performance ◽  
Operational Factor ◽  
Efficiency Effects ◽  
State Of Art ◽  
Selection Of

В статье приводятся результаты экспериментального исследования влияния конструктивных факторов на ходовые качества перспективного волнорассекающего пассажирского катамарана. Цель работы – поиск принципиальных технических решений по облику катамарана, обеспечивающих повышенные ходовые качества на тихой воде, в условиях волнения и экономическую эффективность. Оценено влияние скорости хода на ходовую посадку, гидродинамическое сопротивление, буксировочную и потребную мощность волнорассекающего катамарана. Выявлена эффективность применения транцевого интерцептора на волнорассекающем катамаране. Обсуждается рациональный выбор перемещения (выдвига) транцевого интерцептора при заданных значениях водоизмещения и эксплуатационной скорости. Выявлена целесообразность перехода от двулапых кронштейнов гребных валов к однолапым. Определено изменение потребной мощности при переходе от двулапого кронштейна к однолапому. Дана количественная оценка влияния выступающих частей (рулей и кронштейнов) на буксировочное сопротивление модели. Оценено взаимное влияние выдвига интерцептора и угла статического дифферента на характеристики ходкости при движении катамарана со скоростью экономического хода и эксплуатационной скоростью. Выявлена зависимость дополнительного буксировочного сопротивления модели на волнении от формы соединительного моста катамарана. Результаты исследований использованы при проектировании современного экологичного пассажирского катамарана проекта «Ecocruiser». The paper presents results of experimental study of structural factor effects on speed performance of a promising wave-cleaving passenger catamaran. The work purpose consists in searching for basic engineering solutions on the catamaran appearance that provide increased speed performance in still water and in seas, as well as economical efficiency. Effects of travel speed on operating trim, flow resistance, towrope power and power requirements of a wave-cleaving catamaran are evaluated. Effectiveness of using a transom intercepter in a wave-cleaving catamaran was identified. Rational selection of transom intercepter movement (advance) at specified displacement and operational speed values are discussed. Expedience of transition from two-leg propeller struts to single-leg ones is shown. Change of the power requirements at transition from two-leg propeller struts to single-leg ones is evaluated. Effects of projecting parts (rudders and propeller struts) on the model towrope resistance are evaluated quantitatively. Mutual effects of intercepter advance and static trim angle on the propulsion qualities under catamaran operation at economical and service speeds are evaluated. Dependence of the model additional towrope resistance in seas on the catamaran cross-deck structure shape are derived. The investigation results were used for design of a state-of-art ecological passenger catamaran “Ecocruiser”.

scholarly journals The use of cement concrete pavements for roads, depending on climatic conditions

2019 ◽  
Vol 13 (3) ◽  
pp. 235-240
Author(s):  
Iryna Solonenko
Keyword(s):  
European Union ◽  
Statistical Models ◽  
Road Network ◽  
The European Union ◽  
Rational Selection ◽  
Cement Concrete ◽  
The Road ◽  
Road Pavement ◽  
Operational Characteristics ◽  
Selection Of

The development of road network infrastructure is an important component of the economic development of the European Union. Updating of the road network contributes to the integration of the economies of countries into a coherent whole. The road network provides the free movement of citizens, the movement of goods and the effective implementation of various services. The increase in the length of the road network leads to an increase in the financial and material costs necessary to ensure its maintenance and repair. One of the ways to reduce costs is by strengthening the physic-mechanical and operational characteristics of the pavement due to the widespread use of cement concrete. The quality of the pavement of cement concrete depends largely on the rational selection of its composition. This allows a significant increase in the durability of road pavement. The purpose of the research was: the development of recommendations for the rational selection of the composition of the road pavement material of cement concrete, aimed at upgrading longevity, and taking into account its frost resistance grade. According to the goal, the following tasks were developed: the analyses of the climatic zones in which the road network of the European Union is located; the development of a research plan, a selection of the response function and influence factors; the study of physico-mechanical and operational characteristics of the researched material of road pavement; on the basis of the obtained data, the calculation of the complex of experimental-statistical models, which describe the physico-mechanical and operational characteristics of the road pavement material; on the basis of experimental statistical models, a method was proposed for selecting the rational compositions of the cement concrete pavement road material depending on the conditions of its application. The results presented in the article can be used in engineering and scientific practice for the selection of road pavement from cement concrete for highways.

Characterisation of the Femtosecond Laser Micro-Grooving Process for Germanium Substrates

2016 ◽  
Vol 874 ◽  
pp. 291-296 ◽  
Author(s):  
Lin Li ◽  
Jun Wang ◽  
Huai Zhong Li
Keyword(s):  
Experimental Study ◽  
Process Parameters ◽  
Material Removal ◽  
Removal Rate ◽  
High Quality ◽  
Scan Speed ◽  
Micro Grooving ◽  
Fs Laser ◽  
Selection Of ◽  
Germanium Substrates

An experimental study is reported to characterise the femtosecond (FS) laser grooving process for Germanium (Ge) substrates. The effects of process parameters, including laser fluence, pulse repetition rate and scan speed, on the groove characteristics, material removal rate (MRR) and heat affected zone (HAZ) size are discussed. It is shown that with properly selected process parameters, high quality micro-grooves can be obtained on Ge wafers. Recommendations are finally made on the selection of the most appropriate process parameters for FS micro-grooving of Ge substrates.

scholarly journals Strategi Restructuring Cognitive Dalam Konseling Kelompok CBT Untuk Meningkatkan Kepercayaan Diri Siswa Kelas VIII G di SMP PGRI 1 Buduran Sidoarjo

2020 ◽  
Vol 5 (2) ◽  
pp. 62-67
Author(s):  
Oom Linda Rukmana ◽  
Kusbandiami ◽  
Maghfirotul Lathifah
Keyword(s):  
Experimental Study ◽  
Research Design ◽  
Group Counseling ◽  
Cognitive Restructuring ◽  
Sampling Techniques ◽  
Self Confidence ◽  
Counseling Group ◽  
Class Viii ◽  
Confidence Measurement ◽  
Selection Of

This study aims to determine the effect of the use of cognitive restructuring strategies in group counseling on class VIII G students' confidence in SMP PGRI 1 BUDURAN SIDOARJO. The research design used was a Pre-Experimental study with a One Group Pretest-Postest Design. The population of class VIII G students at SMP PGRI 1 BUDURAN SIDOARJO was 30 students, then 4 students were taken as research samples using purposive sampling techniques. The selection of this sample was chosen based on the results of students' low self-confidence scores through filling in the scale of student confidence measurement. The results of this study  was found that there was no significance changed in the use of cognitive restructuring  in counseling group on the confidence of students of class VIII G in SMP PGRI 1 BUDURAN SIDOARJO.

scholarly journals SUBSTANTIATION OF CHOICE OF VEGETABLE CROPS SUITABLE FOR GROWING ON SALTED SOILS

2020 ◽  
Vol 5 (4(73)) ◽  
pp. 12-18
Author(s):  
G.T. Bekmirzaev ◽  
I.A. Begmatov ◽  
D.B. Yulchiev
Keyword(s):  
Experimental Study ◽  
New Zealand ◽  
Salt Content ◽  
Vegetable Crops ◽  
Agricultural Systems ◽  
Salt Tolerant ◽  
As Species ◽  
High Salt Content ◽  
The University ◽  
Selection Of

The purpose of the experimental study was the selection of salt tolerant crops and the search for useful horticultural species for growing them on saline lands. The experimental study was conducted at the University of Algarve, Portugal, in a greenhouse. The following vegetable crops were selected for research: lettuce (Lactuca sativaL), New Zealand spinach (Tetragonia tetragonioides) and garden purslane (Portulaca oleracea). Experimental results showed that New Zealand spinach and garden purslane have high potential as species resistant to high salt content and are therefore recommended for cultivation in order to reduce soil salinity. The above crops, mainly New Zealandspinach, are good types of garden crops with high useful qualities and productivity. Therefore, it has been shown that this method is a clean and environmentally friendly tool to prevent salinization and maintain the sustainability of agricultural systems

scholarly journals Rational selection of treatment methods in recurrent clubfoot

2021 ◽  
pp. 64-71
Author(s):  
G. V. Divovich
Keyword(s):  
Surgical Treatment ◽  
Bone Growth ◽  
Soft Tissues ◽  
Primary Treatment ◽  
Ponseti Method ◽  
Growth Potential ◽  
Idiopathic Clubfoot ◽  
Rational Selection ◽  
Congenital Clubfoot ◽  
Selection Of

Objective. Based on an analytical assessment of the results of surgical treatment of children with equinovarus foot deformity of various origins (idiopathic clubfoot, syndromic clubfoot), to determine a way of rational selection of surgical techniquesin each specifc case.Materials and methods. The results of the treatment of 78 children with congenital idiopathic clubfoot over the period 2010–2018 were assessed in comparison with the results of the treatment of 41 children with recurrent congenital clubfoot, whose primary treatment had been carried out before 2010. We have gained the experience in treating 30 children with severe clubfoot syndrome (meningomyelocele, CNS lesions, chromosomal diseases and others).Results. In the treatment of congenital clubfoot with the Ponseti method, recurrences occur in 21.79 % of the cases, and in the traditional treatment — in 57.74 %. The Ponseti surgical treatment of recurrences consists in performing release operations on the tendon-ligament apparatus from mini-accesses. Cases of rigid, long-standing deformities require extensive releases on soft tissues, as well as resection and arthrodesis interventions on the joints of the foot. The treatment of clubfoot syndrome requires “surgically aggressive” methods of correction in early childhood.Conclusion. In the idiopathic variants of clubfoot and its relapses, it is possible to correct the vicious position of the feet by minimally invasive operations with minimal damage to the tissues of the circumflex joints and without damage to the flexor tendons and their sheaths in the medial ankle area. Long-standing recurrent rigid variants, as well as syndromic clubfoot, presuppose the performance of extensive releases, osteotomies and arthrodetic resections of the joints of the foot at an early age. A promising direction for clubfoot correction in the process of child development is a surgery with the use of the bone growth potential of the lower leg and foot.

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