A5046868978- Logic, programming, and type systems
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Formal Methods in Verification
- Synthesis and characterization of novel inorganic/organometallic compounds
- Logic, Reasoning, and Knowledge
- Crystallography and molecular interactions
- Coordination Chemistry and Organometallics
- Parallel Computing and Optimization Techniques
- Security and Verification in Computing
- Software Engineering Research
- Organoboron and organosilicon chemistry
- Advanced Chemical Physics Studies
- Advanced Software Engineering Methodologies
- Organometallic Complex Synthesis and Catalysis
- Distributed systems and fault tolerance
- Radio Astronomy Observations and Technology
- Synthesis and Properties of Aromatic Compounds
- Astrophysics and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Molecular Spectroscopy and Structure
- Rare-earth and actinide compounds
- Magnetic and transport properties of perovskites and related materials
- Atmospheric Ozone and Climate
- Software Testing and Debugging Techniques
Singapore Institute of Technology
2016-2025
Lanzhou University
2023-2025
Lanzhou University Second Hospital
2023-2025
Chinese Academy of Sciences
2006-2024
Lanzhou Jiaotong University
2024
National Astronomical Observatories
2017-2024
Boston University
2006-2023
Shanxi Medical University
2023
University of Chinese Academy of Sciences
2006-2022
International Centre for Radio Astronomy Research
2020-2022
We present an approach to enriching the type system of ML with a restricted form dependent types, where index objects are drawn from constraint domain C, leading DML(C) language schema. This allows specification and inference significantly more precise information, facilitating program error detection compiler optimization. A major complication resulting introducing types is that pure for enriched no longer possible, but we show type-checking sufficiently annotated in can be reduced...
We introduce a notion of guarded recursive (g.r.) datatype constructors, generalizing the datatypes in functional programming languages such as ML and Haskell. address both theoretical practical issues resulted from this generalization. On one hand, we design type system to formalize g.r. constructors then prove soundness system. other present some significant applications (e.g., implementing objects, staged computation, etc.) arguing that can have far-reaching consequences programming. The...
We present a type-based approach to eliminating array bound checking and list tag by conservatively extending Standard ML with restricted form of dependent types. This enables the programmer capture more invariants through types while type-checking remains decidable in theory can still be performed efficiently practice. illustrate our concrete examples result preliminary experiments which support feasibility effectiveness approach.
Abstract The synthesis and characterization of a singlet delocalized 2,4‐diimino‐1,3‐disilacyclobutanediyl, [LSi(μ‐CNAr) 2 SiL] ( , L: PhC(N t Bu) Ar: 2,6‐ i Pr C 6 H 3 ), silylenylsilaimine, [LSi(NAr)SiL] are described. reaction three equivalents the disilylene [LSiSiL] 1 ) with two ArNCNAr in toluene at room temperature for 12 h afforded ratio 1:2. Compounds have been characterized by NMR spectroscopy X‐ray crystallography. Compound was also investigated theoretical studies. results...
Abstract The synthesis and reactivity of a silyliumylidene cation stabilized by an amidinate ligand 4‐dimethylaminopyridine (DMAP) are described. reaction the silicon(I) dimer [ L Si:] 2 ( 1 ; =PhC(N t Bu) ) with one equivalent N ‐trimethylsilyl‐4‐dimethylaminopyridinium triflate [4‐NMe C 5 H 4 NSiMe 3 ]OTf two equivalents DMAP in THF afforded Si(DMAP)]OTf ). ambiphilic character is demonstrated from its reactivity. Treatment disilylenylsilylium L′ )Si]OTf = Si:) displacement DMAP. [K{HB( i...
Background The occurrence of pin loosening represents a common issue in the context external fixation methodologies; nevertheless, comprehensive investigation into multifaceted causes loosening, incorporating multivariate analysis among infection, bone quality, and insertion angle, is notably absent current literature. present study endeavors to pinpoint factors associated with through such analysis. Methodology encompassed patients who underwent removal fixators from March 2023 July 2023....
We present a dependently typed assembly language (DTAL) in which the type system supports use of restricted form dependent types, reaping some benefits types at level. DTAL improves upon TAL , enabling certain important compiler optimizations such as run-time array bound check elimination and tag elimination. Also, formally addresses issue representing sum level, making it suitable for handling not only datatypes ML but also Dependent (DML).
Abstract We present an approach to enriching the type system of ML with a restricted form dependent types, where index terms are required be drawn from given language ${\cal L}$ that is completely separate run-time programs, leading DML( ) schema. This enrichment allows for specification and inference significantly more precise information, facilitating program error detection compiler optimization. The primary contribution paper lies in our design, which can effectively support use types...
The synthesis and characterization of novel cis-1,2-disilylenylethene [cis-LSi{C(Ph)=C(H)}SiL] (2; L=PhC(NtBu)(2)) a singlet delocalized biradicaloid [LSi(μ(2)-C(2)Ph(2))(2)SiL] (3) are described. Compound 2 was prepared by the reaction [{PhC(NtBu)(2)}Si:](2) (1) with one equivalent PhC[triple chemical bond]CH in toluene. 3 synthesized 1 two equivalents bond]CPh results suggest that proceeds through an [LSi{C(Ph)==C(Ph)}SiL] intermediate, which then reacts another molecule to form 3....
The article enriches imperative programming with a form of dependent types. We start by explaining some motivations for this enrichment and mentioning major obstacles that need to be overcome. then present the design source level dependently typed language Xanadu, forming both static dynamic semantics establishing type soundness theorem. also realistic examples, which have all been verified in prototype implementation, support practicality Xanadu. claim Xanadu is novel it serves as an...
The synthesis and characterization of novel monomeric silylsilylenes [{PhC(NtBu)(2)}Si--Si{(NtBu)(2)C(H)Ph}R] (R=Cl (2), H (4)) are described. Compound 2 was prepared by the treatment [{PhC(NtBu)(2)}SiHCl(2)] (1) with two equivalents potassium graphite, whereas compound 4 synthesized 1 four graphite. results suggest that silicon(II) hydride intermediate [{PhC(NtBu)(2)}SiH] formed in reduction, which underwent a hydrosilylation amidinate ligand [{PhC(NtBu)(2)}SiR] or H) to form 4,...
The tetrasilacyclobutadiene [LSi(μ-SiL')2 SiL] (L=PhC(NtBu)2 , L'=2,6-iPr2 C6 H3 NSiMe3 ) consists of an aromatic silicon-containing four-membered ring in which two π, σ, and lone-pair electrons are cyclically delocalized. electron delocalization was illustrated by theoretical studies reactivity with elemental sulfur to form the allylic zwitterionic cyclic compound [(LSi)2 (μ-SiL')(μ-Si(S)L')] 2π-electron along Si3 skeleton.
The aromatic low-valent lead analogue of an indenyl anion (see scheme; 1) undergoes oxidation with SnCl2 to form the base-stabilized lead(I) dimer 2. Reduction 2 lithium regenerates 1. These compounds were characterized by NMR spectroscopy and X-ray crystallography.
Neutral hydrogen (HI) is the primary component of cool interstellar medium (ISM) and reservoir fuel for star formation. Owing to sensitivity existing radio telescopes, our understanding evolution ISM in galaxies remains limited, as it based on only a few hundred detected HI beyond local Universe. With high Five-hundred-meter Aperture Spherical Telescope (FAST), we carried out blind search, FAST Ultra-Deep Survey (FUDS), which extends redshifts up 0.42 50 $\rm \mu Jy \cdot beam^{-1}$. Here,...
The reaction of the disilylene [{PhC(NBut)2}Si]2 (1) with 1 equiv bromine in toluene afforded novel monomeric bromosilylene [{PhC(NBut)2}SiBr] (2). result shows that SiI−SiI bond was cleaved by bromine. An X-ray structure compound 2 has been determined.
Abstract The synthesis and characterization of new amidinate‐stabilized germatrisilacyclobutadiene ylides [L 3 Si GeL′] (L=PhC(N t Bu) 2 ; L′=ËL; Ë=Ge ( ), 7 )) are described. Compound was prepared by the reaction [LSiSiL] 1 ) with one equivalent [LGeGeL] in THF. synthesized excess bisamidinate germylene Ge:] 4 is a by‐product both reactions. Moreover, compound Compounds have been characterized NMR spectroscopy, X‐ray crystallography, theoretical studies. results show that compounds not...
Abstract The syntheses of a zwitterionic base‐stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene supported by amidinates low‐valent germanium amidinate substituents are described. reaction the Ge I dimer, [LGe:] 2 ( 1 , L=PhC(N t Bu) ), with two equivalents tin(II) chloride, [LSnCl] KC 8 in tetrahydrofuran (THF) at room temperature afforded mixture digermadistannacyclobutadiene, [L Sn L′ ] 3 ; L′=LGe:), bis(amidinate) compound, Sn:] 4 ). Compound can also be prepared Ar...
Abstract The two‐electron reduction of a Group 14‐element(I) complex [RË⋅] (E=Ge, R=supporting ligand) to form novel low‐valent dianion radical with the composition [RË:] . 2− is reported. reaction [LGeCl] ( 1 , L=2,6‐(CHNAr) 2 C 6 H 3 Ar=2,6‐ i Pr ) excess calcium in THF at room temperature afforded germylidenediide [LGe] ⋅Ca(THF) 2+ ). proceeds through formation germanium(I) [LGe⋅], which then undergoes EPR spectroscopy, X‐ray crystallography, and theoretical studies show that germanium...