138 research outputs found
A Generalization of Random Matrix Ensemble I: General Theory
We give a generalization of the random matrix ensembles, including all
lassical ensembles. Then we derive the joint density function of the
generalized ensemble by one simple formula, which give a direct and unified way
to compute the density functions for all classical ensembles and various kinds
of new ensembles. An integration formula associated with the generalized
ensemble is also given. We also give a classification scheme of the generalized
ensembles, which will include all classical ensembles and some new ensembles
which were not considered before.Comment: 15 page
4-(4-Fluorophenyl)-2-oxo-1,2,5,6-tetrahydrobenzo[h]quinoline-3-carbonitrile
In the molecule of the title compound, C20H13FN2O, the fluorophenyl ring is oriented at a dihedral angle of 72.76 (3)° with respect to the fused benzene ring. In the crystal structure, intermolecular N—H⋯O, C—H⋯O and C—H⋯F interactions link the molecules into chains. π–π contacts between the quinoline and benzene rings [centroid–centroid distance = 3.918 (3) Å] may further stabilize the structure. A weak C—H⋯π interaction is also present. The O atom and two of the CH2 groups of the quinoline ring system are disordered over two positions. The O atom was refined with occupancies of 0.489 (17) and 0.511 (17), while C and H atoms were refined with occupancies of 0.435 (13) and 0.565 (13)
2-Amino-4-(2-chlorophenyl)-5,10-dioxo-5,10-dihydro-4H-benzo[g]chromene-3-carbonitrile
In the molecule of the title compound, C20H11ClN2O3, the pyran ring adopts a flattened-boat conformation. In the crystal structure, intermolecular N—H⋯N and N—H⋯O hydrogen bonds generate edge-fused R
2
2(12) and R
2
2(14) ring motifs; the hydrogen-bonded motifs are linked to each other, forming a three-dimensional network. A π–π contact [centroid-to-centroid distance = 3.879 (3) Å] between the chlorophenyl rings may further stabilize the structure
DialoGPS: Dialogue Path Sampling in Continuous Semantic Space for Data Augmentation in Multi-Turn Conversations
In open-domain dialogue generation tasks, contexts and responses in most
datasets are one-to-one mapped, violating an important many-to-many
characteristic: a context leads to various responses, and a response answers
multiple contexts. Without such patterns, models poorly generalize and prefer
responding safely. Many attempts have been made in either multi-turn settings
from a one-to-many perspective or in a many-to-many perspective but limited to
single-turn settings. The major challenge to many-to-many augment multi-turn
dialogues is that discretely replacing each turn with semantic similarity
breaks fragile context coherence. In this paper, we propose DialoGue Path
Sampling (DialoGPS) method in continuous semantic space, the first many-to-many
augmentation method for multi-turn dialogues. Specifically, we map a dialogue
to our extended Brownian Bridge, a special Gaussian process. We sample latent
variables to form coherent dialogue paths in the continuous space. A dialogue
path corresponds to a new multi-turn dialogue and is used as augmented training
data. We show the effect of DialoGPS with both automatic and human evaluation.Comment: ACL 2023 mai
2-Amino-4-(4-chlorophenyl)-6-ferrocenylpyridine-3-carbonitrile
In the molecule of the title compound, [Fe(C5H5)(C17H11ClN3)], the dihedral angles between the two five–membered rings and between the two six-membered rings are 3.28 (4) and 51.33 (4)°, respectively. In the crystal structure, intermolecular N—H⋯N hydrogen bonds link the molecules into centrosymmetric dimers
Linking Empowering Leadership and Employee Work Engagement: The Effects of Person-Job Fit, Person-Group Fit, and Proactive Personality
Based on person-environment fit theory, this study examined the effects of empowering leadership on employee work engagement. We also investigated the mediating mechanism of person-job fit and person-group fit. In addition, we explored employee proactive personality’s moderating role between empowering leadership and the above two kinds of fit, and then the set of indirect effects. Using a survey sample of 6179 employees from a technology company in China, we found that empowering leadership has a positively indirect influence on employees work engagement though person-job fit and person-group fit. Further, moderated mediation analysis revealed proactive personality augmented empowering leadership direct effect on person-job fit and person-group fit and indirect effect on work engagement. Theoretical and practical implications were also discussed
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