Electrochemical oxidation represents an environmentally friendly solution to conventional methods that require caustic stoichiometric chemical oxidants. However, C–H functionalizations merging transition-metal catalysis and electrochemical techniques are, date, largely confined the use of precious metals divided cells. Herein, we report first examples copper-catalyzed aminations arenes at room temperature using undivided cells, thereby providing a practical for construction arylamines. The...

Purpose – The purpose of this paper is to propose a model explore the dynamic process knowledge management from perspectives organizational unlearning and relearning, which promote favorable context for management. Design/methodology/approach proposed based on extensive review literatures. According model, evolutions relearning are separately analyzed, interactions between them revealed. Findings Organizational indispensable factors positively affects by discarding outdated useless...

To exert the imbibition between cracks and matrix effectively enhance development effect of tight oil reservoirs, a physical simulation method for in different scales cores is developed by combining high-pressure large-model system nuclear magnetic resonance technology (NMR) to investigate influencing factors process construct quantitative evaluation water flooding. The results show that counter-current imbibition, lower permeability, later droplet precipitation, longer equilibrium time,...

Based on the basic principle of porosity method in image segmentation, considering relationship between rocks and fractal characteristics pore structures, a new improved segmentation was proposed, which uses calculated core images as constraint to obtain best threshold. The results comparative analysis show that can segment theoretically, but actual effect is deviated from real situation. Due existence heterogeneity isolated pores cores, takes experimental whole criterion cannot achieve...

Purpose The purpose of this study is to adopt the perspective congruence explore how organizational unlearning facilitates knowledge transfer in cross-border mergers and acquisitions (M&A). Design/methodology/approach Drawing on theory, built a theoretical model examined it with survey data from 212 firms China. Findings Organizational has no direct influence transfer. In contrast, promotes routine compatibility that facilitate Routine have different mechanisms Specifically, higher...

Continuum robots driven by rods have a wide range of applications, such as detection and maintenance tasks in unstructured environments. However, their inherent nature flexibility also limits function. Thus, variable stiffness mechanisms for continuum consistently attracted the attention researchers recent years. In this letter, winding-styled rope inspired snakes' behavior is first built into constraint disk rod-driven robot. Combined with shape memory alloy (SMA) spring, winding ropes...

Accurate estimation of lower limb joint kinematics and kinetics using wearable sensors enables biomechanical analysis beyond laboratory settings facilitates real-time adaptation exoskeleton assistance profiles. This study introduces a Dual Transformer Network (DTN) designed to concurrently estimate multiple angles moments from multi-channel surface electromyography (sEMG) signals in the limbs. The performance evaluation predicted for hip, knee, ankle showed average root mean square error...

The increasing variability and turbulence of the external environment have brought more uncertainty to enterprises' survival development. To enhance capability adapting environment, enterprises constantly improve their organisational flexibility. Organisational unlearning has positive effects on flexibility since it can eliminate internal factors that conflict with environment. In this paper, a conceptual model is established examined based data 248 questionnaires from Chinese reveal...

Purpose The purpose of this paper is to explore the relationship between unlearning and strategic flexibility from down-up change perspective. Design/methodology/approach Drawing on routine-updating process, study builds a theoretical model examines it using survey data 233 firms in China. Findings Unlearning enabler flexibility. Specifically, individual organizational both have positive effects Organizational exerts partly mediating effect Originality/value different mechanisms suggests...

Purpose This paper aims to explore the relationships between organizational unlearning and knowledge transfer in cross-border mergers acquisitions (M&As) from a routine-based view. The study also stresses mediating role that integration capability plays this relationship. Design/methodology/approach In all, 178 samples were collected Chinese multinational corporations experienced M&As. addition, bootstrap method was used test of capability. Findings empirical results indicate is...

Purpose This paper aims to adopt the knowledge-based view and social network theory investigate relationship between capability ambidexterity knowledge creation (KC) in context of open innovation. It also examines moderating effects innovation climate on this relationship. Design/methodology/approach developed a model including ambidexterity, KC. A total 463 samples were collected from China test hypotheses by SEM. Findings The empirical results indicate that is crucial antecedent...

Misalignment between human and exoskeleton joints is a common issue in exoskeletons of rigid structure, as it can lead to discomfort or even injuries. Cable-driven exoskeletons, by using skeletal joints, remove misalignment potential issue. However, large parasitic forces due cable pulling endure shortcoming cable-driven exoskeletons. To address the problem, this article proposes novel hip parallel structures for assisted walking with eliminated force. The force potentially caused either...

芳香族卤代物是非常重要的合成砌块, 卤化反应是有机合成中最基本也是最重要的反应之一. 本工作利用2-(吡啶基)异丙基胺(PIP胺)作为双齿导向基团, 以LiCl作为卤素来源, 通过电化学阳极氧化的策略成功实现了钯催化的芳烃邻位C(sp 2)—H键的氯代反应. 此反应条件官能团耐受性强, 底物适用范围广, 同时能兼容噻吩等杂芳环类底物, 为合成(杂)芳基氯代物提供了一种简洁高效的方法. 该反应可以安全的放大到克级制备, 显示了潜在的工业应用前景. 通过连续的邻位碳氢键溴代和氯代反应还能得到高度复杂的2,5,6-三取代的苯甲酰胺类化合物.

This study aims to adopt the perspective of updating routines and knowledge explore how organisational unlearning relearning jointly facilitate strategic flexibility. Drawing on knowledge-based view routine view, this builds a theoretical model examines it with survey data from 194 firms in China. Organisational is an important link between Specifically, has no direct effects promotes relearning, thereby improving fully mediates relationship Therefore, should regard as interactive enablers...

Abstract Propulsion during push-off is the key to realizing human locomotion. Humans have evolved a way of walking with high energy utilization, but it can be further improved. Drawing inspiration from muscle-tendon unit, passive spring-actuated ankle-foot exoskeleton designed assist and lengthen duration by mechanically enhancing efficiency. Detection gait events realized using smart clutch, which detect contact states between shoe sole ground, automatically switch its working state. The...