129 research outputs found
Analysis of the Lovemarks Concept in Sport Industry
Import 05/08/2014Bakalářská práce se zabývá analýzou konceptu lovemarks ve sportovním průmyslu. Práce je rozdělena na dvě základní části, na část teoretickou a praktickou. V teoretické části práce jsou vymezeny pojmy nutné k pochopení dané problematiky. V praktické části byla pomocí metody dotazníkového šetření provedena analýza konceptu lovemarks. V závěrečné části jsou shrnuty výsledky šetření a doporučení.Bachelor thesis deals with the analysis of the lovemarks concept in sport industry. The thesis is structured into two fundamental sections, theoretical and practical. In the theoretical section are defined terms, which are necessary to understand given issue. In the practical section was used the questionnaire method to analyse lovemarks concept. In the final part are summarized results of research and recommendations.115 - Katedra managementuvýborn
Comprehensive typhoon hazard zoning in China based on historical records
The formulation of nationwide goals, strategic plans, and specifically zoned areas for typhoon hazard mitigation and prevention is paramount for addressing the threat in a spatially explicit manner. Utilizing historical rainfall and wind speed data associated with typhoon disasters in the Northwest Pacific and South China Sea from 1949 to 2017, we proposed a comprehensive typhoon hazard zoning delineated based on the assessment of typhoon disaster risks, considering hazard-causing factors, hazard-formative environments, and hazard-bearing bodies through an Analytic Hierarchy Process. High-risk areas were primarily located in the coastal regions of South and Southeast China. Medium-risk areas were situated in the Yangtze River Delta and towns adjacent to Bohai Bay. Low-risk areas were primarily located in the central region of Guangxi, the Guangdong-Hong Kong-Macao Greater Bay Area, the vicinity of Fuzhou, the majority of southern Jiangsu and northern Zhejiang, all of Shanghai, the northern and southern parts of the Shandong Peninsula, the area around Bohai Bay in Tianjin, a minor portion of Hebei, and the three northeastern provinces. Appropriate mitigation measures were proposed to address the threats posed by typhoons in these regions. This information is instrumental in providing reliable support for China in addressing the challenges posed by typhoons. The risk associated with typhoon hazards was evaluated utilizing the Analytic Hierarchy Process (AHP) method.Contributing factors and the prevailing environment were incorporated into the risk assessment.The delineation of hazard zones for typhoons across China was conducted through Geographic Information System (GIS) technology.Zoning for resilient cities was established, with considerations for climate change, to fortify urban areas against the impacts of typhoon hazards. The risk associated with typhoon hazards was evaluated utilizing the Analytic Hierarchy Process (AHP) method. Contributing factors and the prevailing environment were incorporated into the risk assessment. The delineation of hazard zones for typhoons across China was conducted through Geographic Information System (GIS) technology. Zoning for resilient cities was established, with considerations for climate change, to fortify urban areas against the impacts of typhoon hazards.</p
Strain Engineering of Two-Dimensional Piezophotocatalytic Materials for Improved Hydrogen Evolution Reaction
Transition metal dichalcogenide (TMDC) monolayers exhibit
great
photocatalytic performances and tunabilities. By using first-principles
simulations based on density functional theory, we demonstrate here
that external electric bias can be employed to further improve the
photocatalytic hydrogen production efficiencies of the six AB2 (A = Mo, W and B = S, Se, Te) TMDC monolayers since these
are influenced by their piezoelectric response. In particular, when
subjected to a proper amount of electrically induced tensile biaxial
strain, most TMDC monolayers turn into potentially ideal photocatalysts
toward the hydrogen evolution reaction (HER). The beneficial effects
of introducing tensile biaxial strain on the TMDC monolayers are not
limited to the reduction of the band gap and proper adjustment of
the band edge positions; the concomitant hydrogen adsorption free
energies are also modified in such a way that the HER reaction is
noticeably favored
A modified crow search algorithm based on group strategy and adaptive mechanism
As a swarm-based metaheuristic algorithm, the crow search algorithm (CSA) has attracted a lot of attention owing to its simplicity and flexibility. However, CSA tends to have low efficiency. To improve the optimization efficiency, this article proposes a modified version of CSA based on group strategy with an adaptive mechanism (GCSA). On this basis, crows are divided into multiple competing groups, and are assigned different roles and statuses. Then, the group strategy including different search modes is implemented to increase the solution diversity and search efficiency. Moreover, benefiting from the adaptive mechanism, the search range of crows changes in different stages to balance exploration and exploitation capabilities. To evaluate the performance of the proposed algorithm, 35 benchmark test functions (including 10 CEC2020 functions) and three engineering design problems are solved by GCSA and 11 other algorithms. The results prove that GCSA generally provides more competitive results than other metaheuristic algorithms.</p
DataSheet1_Distributed energy storage participating in power trading mechanism for power system flexibility.docx
In the paper of the participation of multiple types of market members, such as photovoltaics, wind power, and distributed energy storage, in market-based trading, the development of new power systems hinges on strengthening the adaptability of power systems to accommodate various types of market participants and improving their flexibility. The establishment of a modern power system also faced major challenges. Such as how to achieving collaborative operation between the main grid, regional distribution networks, and distributed power generation and consumption devices, and how to improving the flexibility of grid operation, and how to increasing device utilization, and reducing operating costs. In view of above-mentioned issues, this study proposed employing the traceability and anti-tampering features of blockchain technology tackle the issue of establishing mutual trust among different types of market participants and, considering the high volatility of new energy output, studies the configuration of a flexible power system in response to output deviations resulting from day-ahead forecasting-intraday operation (DAF-IDO). A market-based trading mechanism involving multiple types of market participants has been established to smooth out the deviation in output from different types of participants, improving the economic benefits of system operation. This study has made innovative contributions as follows: First, this study employed blockchain technology to enable the participation of various types of market participants in trading activities together. Second, this study proposed a method for determining DAF-IDO energy storage action deviations to allow regional distribution networks based on distribution network operators to quantitatively calculate their energy storage supply and demand, providing crucial methodological support for their participation in market trading in the future. Third, the study developed a trading mechanism based on combinatorial auctions for multiple types of market participants, and incorporated an valley compensation mechanism into the pricing mechanism to encourage active and autonomous participation of users, while also considering the economic benefits of all parties involved. Ultimately, numerical simulations were conducted to verify the feasibility and rationality of the trading mechanism, taking into account the DAF-IDO energy storage action deviations while multiple regional networks are participating.</p
Phylogenetic relationships of the IRs.
<p>Unrooted phylogenetic tree of IR protein sequences from <i>B</i>. <i>dorsalis</i>, <i>D</i>. <i>melanogaster</i> and <i>A</i>. <i>gambiae</i>.</p
Sequential Order of the Secondary Structure Transitions of Proteins under External Perturbations: Regenerated Silk Fibroin under Thermal Treatment
Whether
the process of protein folding/unfolding is fully cooperative
or it contains sequential elements has long been a fundamental issue
in protein science. This issue seemingly became straightforward since
the appearance of generalized two-dimensional (2D) correlation spectroscopy
in 1990s, because 2D correlation analysis has been considered as a
convenient and powerful analytical tool to determine the sequential
order of events under external physical or chemical perturbations.
In this work, the sequential order of the secondary structure transitions
of regenerated silk fibroin under thermal treatment from 130 to 220
°C was first studied using generalized 2D correlation spectroscopy,
but an apparently doubtful sequential order was obtained; β-sheet
was the first one to change at low temperature, then the random coil,
followed by the nonamide CO and, finally, the α-helix.
A subsequent detailed in situ infrared spectral analysis showed that
the main secondary structures of silk fibroin, including α-helix,
β-turn, random coil and β-sheet (high-wavenumber component),
all changed with a fully cooperative manner at a relatively low temperature
of 150 °C. But the low-wavenumber component of β-sheet
started to change at a higher temperature of 180 °C. Besides,
it has also been found that, before 200 °C, the loss of α-helix
and random coil was transformed into β-turn, β-sheet,
and nonamide CO. After 200 °C, some β-turn structure
was also disruptured and transformed into β-sheet and nonamide
CO
Phylogenetic relationships of the CSPs.
<p>Unrooted phylogenetic tree of CSP amino acid sequences from <i>B</i>. <i>dorsalis</i>, <i>D</i>. <i>melanogaster</i>, <i>A</i>. <i>gambiae</i>, <i>Ae</i>. <i>aegypti</i>, <i>Culex quinquefasciatus</i> and <i>Glossina morsitans morsitans</i>.</p
Modified Coprecipitation Synthesis of Mesostructure-Controlled Li-Rich Layered Oxides for Minimizing Voltage Degradation
Modified
carbonate coprecipitation synthesis without addition of chelating
agent is introduced to obtain mesostructure-controlled Li-rich layered
oxides. The designed mesostructure for target material Li<sub>1.2</sub>Ni<sub>0.2</sub>Mn<sub>0.6</sub>O<sub>2</sub> has uniformly dispersed
spherical secondary particles with size around 3 μm. These micrometer-sized
particles consist of self-assembled crystallites with size of ∼150
nm. This unique design not only decreases the surface area compared
with the sample with dispersive particles, but also increases overall
structural mechanical stability compared with the sample with larger
dense secondary particles as observed by transmission X-ray microscope.
As a result, the voltage decay and capacity loss during long-term
cycling have been minimized to a large extent. Our findings clearly
demonstrate that mesostructure design of Li-rich layered oxides play
a key role in optimizing this class of cathode materials. Surprisingly,
the voltage fading issue can be partially mitigated by such an approach
Unigenes of candidate olfactory receptors and inotropic receptors.
<p>Unigenes of candidate olfactory receptors and inotropic receptors.</p
- …