Abstract Double‐network hydrogels have outstanding mechanical characteristics but mostly suffer from poor self‐healing performance since most are chemically crosslinked via covalent links for each network. In this work, a tough and double network hydrogel with multiple dynamic non‐covalent bonds is developed by combining the hydrophobically modified polyacrylamide (HPAM) thermally reversible potassium ion κ ‐carrageenan (K + C) through dual physical strategy. Being bond interactions...

New procedures are proposed for estimating the hysteretic energy demand distribution of precast concrete frames using shear-bending story model and spectra. An efficient beam element is specifically developed to account effects some connection parameters. The rationality systematically demonstrated. found be closely related type, location stiffness connections. It feasible utilize relationships between parameters achieve an optimal energy-based seismic design minimizing structural damage.

This paper analyzes and compares four different mechanisms for providing QoS in IEEE 802.11 WLAN. And it evaluates the mode service differentiation (PCF), Distributed Fair Scheduling, Black burst, a scheme proposed by Deng et al. using ns-2 simulator. The evaluation covers medium utilization, access delay, ability to support large number of high priority mobile stations.

The key issue in monocular depth estimation is how to construct the image better and improve quality of map. At present, most methods based on deep learning manipulate images at low resolution that leads loss detail blurring boundaries. Nevertheless, with a large number parameters needs highly computational complexity, which makes it difficult apply high-resolution (HR) estimate. In this work, model accuracy runtime are two important factors be considered. To map reduce running time network,...

Commercial banks occupy an important leading position in China’s banking industry, and their efficiency is of great reference value to the economy financial system, reflecting current state economy. In this paper, super‐efficiency DEA values 19 commercial from 2016 2020 are calculated by employing method into two‐stage network model with constant returns scale. Compared traditional model, better. The results show that more accurate than measured directly network, 1 can be further...

Bin Dua, Ge Lia, Yan Wubc, Zheng Head*, Zhe Qia & Guohui Huangbca Department of Civil Engineering, Dalian University Technology, Dalian, People's Republic Chinab China Machinery International Engineering Design Research Institute Co., Ltd, Changsha, Chinac Corporation, Beijing, Chinad State Key Laboratory Coastal and Offshore

The sudden outbreak of COVID-19 has a great impact on human life security and global economic development. To deal with the rampant pandemic, many countries have taken strict control measures, including restricting gathering in public places stopping production enterprises; as result, enterprises suffered challenges survival development during pandemic. In order to help monitor their own financial situation realize healthy under this paper constructs an Enterprise Financial Early Warning...

To effectively control the seismic performance of precast concrete (PC) frames with semirigid connections under strong earthquakes, a damage-oriented energy capacity spectrum method is proposed performance-based design (PBSD) framework. The dissipation (EDC) corresponding to an equivalent single-degree-of-freedom (SDOF) system PC frame derived based on Coffin–Manson low-cycle fatigue model and expressed as function displacement response. related parameters are experimentally numerically...

Abstract Industrial robots have become key components for manufacturing automations due to their larger workspaces and flexibility. However, low stiffness high compliance of industrial may inevitably lead vibration by self‐excitation or periodic force dependent on workspace configuration. Therefore, the knowledge robot's modal properties should be accurately required enhance operation accuracy robots. To improve identification experimental parameters field robots, an improved subspace method...

This paper employs data envelopment analysis (DEA) to determine crop production efficiency in 15 major provinces of China during 2019‐2020. The total power agricultural machinery, the application amount chemical fertilizer, irrigation area cultivated land, grain sowing, and capacity reservoirs each province are defined as input items. food, oil plants, fruits considered output According findings from DEA, most efficient is observed Shandong Xinjiang provinces. We also discuss role farmers’...

Recently, more attention was put on the noise control of automotive. To reduce intake system some kind automotive, a model automotive found based transfer matrix method and black box experimental method. Then to fulfill requirement design realize better anechoic effect, single objective optimization multi-objective problem formulated. get optimal performance structure parameters, problems were solved by genetic algorithm (GA) NSGAII through Matlab platform, analysis carried out parameters...

Commercial banks have the function of promoting raising and rational distribution funds in economic construction China. are also important smooth development socialist activities national economy other productive activities. At present, one biggest difficulties faced by China's commercial is improvement their efficiency competitiveness face continuous change. This paper establishes evaluation model using DEA-based Malmquist index; it uses a data envelopment analysis (DEA) to analyze...