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Adaptive Slicing for Multi-Axis Hybrid Plasma Deposition and Milling
Hybrid Plasma Deposition and Milling (HPDM), a five-axis manufacturing
system integrated material additive and subtractive processes, can be used to create
overhang metallic components directly without the usage of sacrificial support
structure. Different from conventional slicing methods, a new slicing algorithm with
changeable direction and thickness is proposed in this paper. Minimal overhang length
is selected as the objective function to optimize the build direction. The thickness is
adjusted to meet allowable overhang length and allowable cups height. The input
mesh is first decomposed into non-uniform thickness segment meshes and then each
segment is cut into uniform thickness slices. The output slices consist of split slices
between two adjacent segment meshes and inner slices for each segment mesh.
Examples and analyses confirm the feasibility and effectiveness.Mechanical Engineerin
Anti-electrostatic hydrogen bonding between anions of ionic liquids: A density functional theory study
Hydrogen bonds (HBs) play a crucial role in the physicochemical properties of
ionic liquids (ILs). At present, HBs between cations and anions (Ca-An) or
between cations (Ca-Ca) in ILs have been reported extensively. Here, we
provided DFT evidences for the exists of HBs between anions (An-An) in the IL
1-(2-hydroxyethyl)-3-methylimidazolium 4-(2-hydroxyethyl)imidazolide
[HEMIm][HEIm]. The thermodynamics stabilities of anionic, cationic, and H2O
dimers together with ionic pairs were studied by potential energy scans. The
results show that the cation-anion pair is the most stable one, while the HB in
anionic dimer possesses similar thermodynamics stability to the water dimer.
The further geometric, spectral and electronic structure analyses demonstrate
that the inter-anionic HB meets the general theoretical criteria of traditional
HBs. The strength order of four HBs in complexes is cation-anion pair > H2O
dimer = cationic dimer > anionic dimer. The energy decomposition analysis
indicates that induction and dispersion interactions are the crucial factors to
overcome strong Coulomb repulsions, forming inter-anionic HBs. Lastly, the
presence of inter-anionic HBs in ionic cluster has been confirmed by a global
minimum search for a system containing two ionic pairs. Even though
hydroxyl-functionalized cations are more likely to form HBs with anions, there
still have inter-anionic HBs between hydroxyl groups in the low-lying
structures. Our studies broaden the understanding of HBs in ionic liquids and
support the recently proposed concept of anti-electrostatic HBs
Estimation of the User Contribution Rate by Leveraging Time Sequence in Pairwise Matching function-point between Users Feedback and App Updating Log
Mobile applications have become an inseparable part of people's daily life.
Nonetheless, the market competition is extremely fierce, and apps lacking
recognition among most users are susceptible to market elimination. To this
end, developers must swiftly and accurately apprehend the requirements of the
wider user base to effectively strategize and promote their apps' orderly and
healthy evolution. The rate at which general user requirements are adopted by
developers, or user contribution, is a very valuable metric that can be an
important tool for app developers or software engineering researchers to
measure or gain insight into the evolution of app requirements and predict the
evolution of app software. Regrettably, the landscape lacks refined
quantitative analysis approaches and tools for this pivotal indicator. To
address this problem, this paper exploratively proposes a quantitative analysis
approach based on the temporal correlation perception that exists in the app
update log and user reviews, which provides a feasible solution for
quantitatively obtaining the user contribution. The main idea of this scheme is
to consider valid user reviews as user requirements and app update logs as
developer responses, and to mine and analyze the pairwise and chronological
relationships existing between the two by text computing, thus constructing a
feasible approach for quantitatively calculating user contribution. To
demonstrate the feasibility of the approach, this paper collects data from four
Chinese apps in the App Store in mainland China and one English app in the U.S.
region, including 2,178 update logs and 4,236,417 user reviews, and from the
results of the experiment, it was found that 16.6%-43.2% of the feature of
these apps would be related to the drive from the online popular user
requirements
Ionic Liquid Design and Process Simulation for Decarbonization of Shale Gas
Ionic
liquids (ILs) have been receiving increasing attention as
a potential decarbonization solvent. However, the enormous number
of potential ILs that can be synthesized makes it a challenging task
to search for the best IL for CO<sub>2</sub> removal from methane.
In this work, a method was proposed to screen suitable ILs based on
the COSMO-RS (conductor-like screening model for real solvents) model,
an absorption mechanism, and experimental data. Besides the Henry’s
constant, the viscosity and toxicity of ILs should also be taken into
consideration for an industrial decarbonization process. Furthermore,
process simulation was performed to evaluate the new IL-based decarbonization
technology. Considering CO<sub>2</sub> solubility, CO<sub>2</sub>/CH<sub>4</sub> selectivity and toxicity and viscosity of ILs, [bmim]Â[NTf<sub>2</sub>] has been screened to be the potential solvent among 90 classes
of ILs. Based on reliable experimental data, a rigorous thermodynamic
model was established. The simulation results have been found to agree
well with the available experimental results. Two process flow sheet
options, use of two single-stage flash operations or a multistage
flash operation following the absorber, have been simulated and assessed.
Compared with the well-known MDEA (methyldiethanolamine) process for
CO<sub>2</sub> capture, the single-stage and multistage process alternatives
would reduce the total energy consumption by 42.8% and 66.04%, respectively
Im/possible Lives: Gender, Class, Self-Fashioning, and Affinal Solidarity in Modern South Asia
Drawing on ethnographic research and employing a micro-historical approach that recognizes not only the transnational but also the culturally specific manifestations of modernity, this article centers on the efforts of a young woman to negotiate shifting and conflicting discourses about what a good life might consist of for a highly educated and high caste Hindu woman living at the margins of a nonetheless globalized world. Newly imaginable worlds in contemporary Mithila,South Asia, structure feeling and action in particularly gendered and classed ways, even as the capacity of individuals to actualize those worlds and the “modern” selves envisioned within them are constrained by both overt and subtle means. In the context of shifting cultural anchors, new practices of silence, literacy, and even behaviors interpreted as “mental illness” may become tactics in an individual’s negotiation of conflicting self-representations. The confluence of forces at play in contemporary Mithila, moreover, is creating new structures of feeling that may begin to reverse long-standing locally held assumptions about strong solidarities between natal families and daughters, on the one hand, and weak solidarities between affinal families and new daughters-in-law, on the other
A Novel Wide-Area Backup Protection Based on Fault Component Current Distribution and Improved Evidence Theory
In order to solve the problems of the existing wide-area backup protection (WABP) algorithms, the paper proposes a novel WABP algorithm based on the distribution characteristics of fault component current and improved Dempster/Shafer (D-S) evidence theory. When a fault occurs, slave substations transmit to master station the amplitudes of fault component currents of transmission lines which are the closest to fault element. Then master substation identifies suspicious faulty lines according to the distribution characteristics of fault component current. After that, the master substation will identify the actual faulty line with improved D-S evidence theory based on the action states of traditional protections and direction components of these suspicious faulty lines. The simulation examples based on IEEE 10-generator-39-bus system show that the proposed WABP algorithm has an excellent performance. The algorithm has low requirement of sampling synchronization, small wide-area communication flow, and high fault tolerance
Quantum-dot based nanothermometry in optical plasmonic recording media
We report on the direct experimental determination of the temperature increment caused by laser irradiation in a optical recording media constituted by a polymeric film in which gold nanorods have been incorporated. The incorporation of CdSe quantum dots in the recording media allowed for single beam thermal reading of the on-focus temperature from a simple analysis of the two-photon excited fluorescence of quantum dots. Experimental results have been compared with numerical simulations revealing an excellent agreement and opening a promising avenue for further understanding and optimization of optical writing processes and media
Regional Chemotherapy and Brachytherapy for Malignant Glioma – Clinical Experience and Serial Experiments
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