Bis{3-[2-(methyl­sulfon­yl)pyrimidin-4-yl]pyridinium} tetra­chloridocadmium

In the title compound, (C10H10N3O2S)2[CdCl4], the CdII ion lies on a twofold axis and is coordinated by four chloride anions, with bond distances of 2.4787 (10) and 2.4410 (10) Å. A chain along the c axis is formed by C—H⋯N hydrogen-bonding inter­actions and a weak π–π inter­action is observed between the pyrimidine rings of two adjacent parallel chains [centroid–centroid distance = 3.722 (2) Å]. N—H⋯Cl, CN—H⋯Cl and N—H⋯O interactions also occur

Poly[aqua­bis­[μ3-4-(3-pyrid­yl)pyrimidine-2-sulfonato-κ4 N 4:N 1,O:O][μ2-4-(3-pyrid­yl)pyrimidine-2-sulfonato-κ3 N 4:N 1,O]tris­ilver(I)]

In the crystal structure of the title compound, [Ag3(C9H6N3O3S)3(H2O)2]n, the mol­ecules are linked into three-decked polymeric zigzag chains propagating in [100]. On the middle deck, the Ag atom is five-coordinated by three O atoms from three 4-(3-pyrid­yl)pyrimidine-2-sulfonate (L) ligands, one of which lies on a mirror plane with the sulfonate group disordered over two orientations in a 1:1 ratio, and two N atoms from two L ligands, which lie on the same mirror plane. On the upper and lower decks, the Ag atom is four-coordinated by an aqua ligand, one O and two N atoms from two L ligands with the pyridyl and pyrimidine rings twisted at 19.8 (2)°. In the polymeric chain, there are π–π inter­actions between six-membered rings of L ligands from different decks with centroid–centroid distances of 3.621 (7) and 3.721 (3) Å. In the crystal, inter­molecular O—H⋯O hydrogen bonds link further these three-decked chains into layers parallel to (010)

Bis[3-dimethyl­amino-1-(pyridin-2-yl)prop-2-en-1-one-κ2 N 1,O]tris­(nitrato-κ2 O,O)gadolinium(III) ethanol disolvate

In the title compound, [Gd(NO3)3(C10H12N2O)2]·2C2H5OH, the GdIII ion and one nitrate anion are located on a twofold rotation axis. The GdIII ion is ten-coordinated by two N and two O atoms from two bidentate 3-(N,N-dimethyl­amino)-1-(2-pyrid­yl)prop-2-en-1-one) ligands and six O atoms from three nitrate anions in a distorted bicapped square-anti­prismatic geometry. In the crystal, the components are linked by O—H⋯O hydrogen bonds. The ethanol solvent mol­ecule is disordered over two positions in a ratio 0.615 (16):0.385 (16)

CLEVA: Chinese Language Models EVAluation Platform

With the continuous emergence of Chinese Large Language Models (LLMs), how to evaluate a model's capabilities has become an increasingly significant issue. The absence of a comprehensive Chinese benchmark that thoroughly assesses a model's performance, the unstandardized and incomparable prompting procedure, and the prevalent risk of contamination pose major challenges in the current evaluation of Chinese LLMs. We present CLEVA, a user-friendly platform crafted to holistically evaluate Chinese LLMs. Our platform employs a standardized workflow to assess LLMs' performance across various dimensions, regularly updating a competitive leaderboard. To alleviate contamination, CLEVA curates a significant proportion of new data and develops a sampling strategy that guarantees a unique subset for each leaderboard round. Empowered by an easy-to-use interface that requires just a few mouse clicks and a model API, users can conduct a thorough evaluation with minimal coding. Large-scale experiments featuring 23 Chinese LLMs have validated CLEVA's efficacy.Comment: EMNLP 2023 System Demonstrations camera-read

Ab initio study of lattice instabilities of zinc chalcogenides ZnX (X=O, S, Se, Te) induced by ultrafast intense laser irradiation

Ab initio calculations of lattice constants, lattice stabilities of ZnX (X=O, S, Se, Te) at different electronic temperatures (Te) have been performed using generalized gradient approximation (GGA) pseudopotential method within the density functional theory (DFT). The calculated phonon frequencies of ZnX at Te = 0 eV accord well with the experimental and other theoretical values. Firstly, it is indicated that the lattice constants of ZnX increase and all the phonon frequencies reduce as Te increases. Additionally, the transverse-acoustic phonon frequencies of ZnX are imaginary with the elevation of Te, namely the lattices of ZnX become unstable under ultrafast intense laser irradiation. Moreover, the transverse optical mode-longitudinal optical mode (LO-TO) splitting degree of ZnX (X=S, Se, Te) gradually decreases as the electronic temperature increases, mainly due to the reason that the electronic excitation weakens the strength ionicity of ionic crystal ZnX under intense laser irradiation. However, the LO-TO splitting degree of ZnO firstly increases and then decreases with the increase of electronic temperature. After that, it can be helpful for understanding the mechanism of ultrafast intense laser induced semiconductors damage

Accelerating FPGA Design Space Exploration Using Circuit Similarity-Based Placement

Abstract—This paper describes a novel and fast placement algorithm for FPGA design space (e.g., area, power or reliability) exploration. The proposed algorithm generates the placement based on the topological similarity between two configurations (netlists) in the design space. Thus, it utilizes the sharing of reusable information during the design space exploration and avoids the time-consuming placement computation like VPR. Tested on logic-level and algorithm-level design space exploration cases, our similarity-based placement accurately depicts the “shape ” of a design space and pinpoints the designs which are of most interest to IC designers. Moreover, a turbo version of circuit similarity-based placement performs an average of 30x (up to 100x) faster than VPR’s while still achieving comparable placement results. I