Harbin University

Abundant Reaction Mechanisms for the α-Nucleophile-Involved Reaction of HOO– + CH3Br

Abstract The reaction of the peroxide ion with CH3Br was investigated by direct dynamics simulation. A variety of reaction mechanisms, i.e., front-side complex, proton exchange, and H-migration mechanisms, were found, and the nature of these mechanisms was discussed in detail, wh...

Research on Disturbance Control of Electro-Hydraulic Servo Systems Based on Fractional-Order Sliding Mode Control

To improve the disturbance rejection performance of valve-controlled cylinder electro-hydraulic servo systems under external disturbances and load variations, this paper proposes a fractional-order sliding mode control (FOSMC) strategy. A system model with dual-inertia compensati...

Evaluation of the Rb/Sr ratio as an indicator of chemical weathering: a case study from five sedimentary sections in Northeast China

Chemical weathering plays a pivotal role in the Earth's surface material cycle and global climate regulation. It not only facilitates the reconstruction of palaeoclimate characteristics but also provides essential insights into Earth's evolutionary history. The Rb/Sr ratio has be...

Safety evaluation of new energy three-electric systems using enhanced physics-informed neural networks

Accurate safety-state measurement of the three-electric system in new energy vehicles is essential for ensuring reliable and secure operation. This paper proposes an artificial-intelligence-assisted safety measurement framework that integrates a searchable encryption mechanism wi...

Aero‐breakup of droplets: Recent progress and outlook

Abstract Aero‐breakup of droplets is a classic academic topic in fluid mechanics that describes the process of droplets breaking into multiple smaller ones or fine mists in an air flow. An in‐depth understanding of the aero‐breakup of liquid droplets is essential for the applicat...

Enhanced elastocaloric performance and cyclic stability of elastocaloric effect in Mn and Y co-doped all-d-metal Co-V-Ti Heusler alloy

The all- d -metal Co-V-Ti Heusler alloy, due to its excellent mechanical and elastocaloric properties, shows great application potential in the field of elastocaloric refrigeration. However, the cyclic stability of elastocaloric effect (eCE) of such alloys still needs to be furth...

Optimized scandium doping in Al₂Mo₃O₁₂ with NP co-doped carbon coating for enhanced low-temperature lithium storage

The development of low-temperature anode materials is crucial for the practical application of lithium-ion batteries (LIBs). Al 2− x Sc x Mo 3 O 12 ( x = 0, 0.5, 1, 1.5) materials were synthesized using a high-temperature solid-state method, and the effects of scandium doping on...

Land-cover classification stability tracks divergent productivity and water-use-efficiency trajectories across boreal woody vegetation in the Daxing’anling Mountains

Annual land-cover labels are often treated as fixed ecological classes, yet boreal pixels near canopy-cover thresholds may repeatedly alternate between forest and woody-savanna categories. We tested whether classification persistence identifies distinct long-term carbon–water tra...

Curling Video Action Recognition and Instructional Design Based on the MSTF-GCN Model

With the deepening of smart sports construction and the popularization and development of ice and snow sports, the refined teaching and standardized training of curling have put forward higher requirements for intelligent action recognition technology. In response to industry pai...

Oxygen vacancy tungsten oxide modified carbon cloth anode for enhancing microbial fuel cell performance

To mitigate the adverse effects of binders in the anode of microbial fuel cells (MFCs) and to enhance the performance of WO 3 anodes, the WO 3-X /CC, serving as a high-performance anode for MFCs, was developed using magnetron sputtering to apply tungsten oxide onto carbon cloth....

Seismic Risk Assessment of Elevator Entrapment in Urban Buildings

Abstract When an earthquake occurs, elevators are highly susceptible to damage, leading to people being trapped and posing significant challenges to emergency rescue. This paper proposes a method for assessing the number and distribution of elevator-trapped individuals in urban a...

Some Semi-decoupled Algorithms with Optimal Convergence for a Four-Field Linear Thermo-poroelastic Model

Abstract We propose a parallel semi-decoupled algorithm to efficiently solve a four-field thermo-poroelastic model. At the initial time step, all variables are computed simultaneously using a monolithic solver; thereafter, the system is split into a mixed linear elasticity (M) su...

Spherical disturbance elements for compound enhancement in bionic fish-scale tubes: Wake control and thermo-hydraulic performance

Enhancing convective heat transfer in circular tubes is crucial for compact heat exchangers, but conventional passive structures often suffer from weak heat transfer in downstream recirculation zones. To address this limitation, a bionic fish-scale composite sphere enhanced heat...

Fueling sustained green innovation advantage in Chinese listed firms: how AI orientation works through knowledge recombination and knowledge diversity

Purpose Green innovation is critical to long-term advantage, yet sustaining it across multiple dimensions remains difficult. Drawing on the knowledge-based view, attention-based view and dynamic capability theory, this study aims to examine how artificial intelligence (AI) orient...

K+-Doped Cs2NaInCl6 Nanocrystals with Enhanced Nonlinear Absorption and Optical Limiting for Laser Protection Applications

Abstract To address intrinsic parity-forbidden transitions, strong electron-phonon coupling, and defect-assisted nonradiative recombination in Cs2NaInCl6 nanocrystals, K-doped Cs2NaInCl6:xK+ (x = 0−1) nanocrystal powders were synthesized via a hot-injection method. The powders we...

Effect of Cu / Mn Content and Homogenization Modes on ALTEK Alloys Strip Microstructure and Properties

Abstract This paper presents the results of a comprehensive study on the microstructure and physical-mechanical properties of strips produced from promising ALTEK system aluminum alloys (2Cu1.5Mn and 3Cu2Mn compositions) in a full thermomechanical processing cycle, including cold...

Evaluation of axial stress‐axial strain behavior of high‐strength fiber‐reinforced lightweight aggregate concrete ( HSFRLC ) confined with spiral stirrups under axial compression

Abstract The axial stress–strain models of confined high‐strength fiber‐reinforced lightweight concrete (HSFRLC) were important key inputs for analytical programs to predict the full‐range loading deformation of confined HSLC and HSFRLC. The descending branch of the axial stress‐...

From knowledge-oriented leadership to triple-bottom-line outcomes: the mediating role of sustainable development goals, knowledge-worker responsibility, and competence

Purpose Drawing on the knowledge- and resource-based view, this study seeks to determine how knowledge-oriented leadership contributes to Sustainable Performance across all dimensions of the triple bottom line, considering the mediating effects of the Sustainable Development Goal...

Effect of gadolinium on microstructure characteristics and strengthening mechanisms of Mg(‐Gd)‐Nd‐Zn‐Zr alloys by hot treatment

In this study, a quantitative analysis was performed to assess the respective contributions of gadolinium (Gd) addition and heat treatment to the strengthening of the Mg–3Nd–1Zn–0.5Zr alloy. The results indicate that gadolinium addition not only refines the grain structure but al...

Physical fitness profiles and behavioral correlates among preschoolers in a high-latitude cold region: a cross-sectional study in Heilongjiang, China

Physical fitness during the preschool years is an important indicator of growth, motor development, and early health. However, evidence describing physical fitness profiles among preschool children in cold-climate regions remains limited, particularly regarding how body morpholog...