A Closed-Form Robust Chinese Remainder Theorem and Its Performance Analysis

Wenjie Wang,Xiang-Gen Xia IEEE 2010 IEEE transactions on signal processing Vol.58 No.11

<P>Chinese remainder theorem (CRT) reconstructs an integer from its multiple remainders that is well-known not robust in the sense that a small error in a remainder may cause a large error in the reconstruction. A robust CRT has been recently proposed when all the moduli have a common factor and the robust CRT is a searching based algorithm and no closed-from is given. In this paper, a closed-form robust CRT is proposed and a necessary and sufficient condition on the remainder errors for the closed-form robust CRT to hold is obtained. Furthermore, its performance analysis is given. It is shown that the reason for the robustness is from the remainder differential process in both searching based and our proposed closed-form robust CRT algorithms, which does no exist in the traditional CRT. We also propose an improved version of the closed-form robust CRT. Finally, we compare the performances of the traditional CRT, the searching based robust CRT and our proposed closed-form robust CRT (and its improved version) algorithms in terms of both theoretical analysis and numerical simulations. The results demonstrate that the proposed closed-form robust CRT (its improved version has the best performance) has the same performance but much simpler form than the searching based robust CRT.</P>

Identification of novel alleles induced by EMS-mutagenesis in key genes of kernel hardness and starch biosynthesis in wheat by TILLING

Wenjie Li,Huijun Guo,Yongbin Wang,Yongdun Xie,Linshu Zhao,Jiayu Gu,Shirong Zhao,Baocun Zhao,Guangjin Wang,Luxiang Liu 한국유전학회 2017 Genes & Genomics Vol.39 No.4

To identify novel allelic variations in key genes of wheat quality, the present study used the targeting induced local lesions in genomes platform to detect point mutations in target genes. The wheat variety Longfumai 17 was treated by the mutagen ethyl methanesulfonate to produce a bulk M2 generation, and the population included 1122 plants. A total length of 3906.80 kb nucleotides was analyzed, and the average mutation density was 1/244.17 kb. The identified mutations included G>A substitutions (43.75%), C>T substitutions (31.25%), A insertions (12.50%), T insertions (6.25%), and deletions (6.25%). These point mutations led to changes in amino acids and thus the encoded protein sequences, ultimately producing 18.75% of missense mutations, 12.50% of frame shift mutations, 6.25% of nonsense mutations, 25.00% of silent mutations and 37.50% of non-coding region mutations. In the kernel hardness gene Pinb and 3 starch synthesis genes waxy, Agp2 and SSIIa-A, we detected 16 different point mutations in 25 mutant lines. The Pinb gene harbored two missense mutations and a nonsense mutation; the C>T missense mutation resulted in a novel allele, this novel allele and the nonsense mutation alerted protein 3D structure; the waxy gene presented missense and frame shift mutations; the Agp2 gene carried a missense mutation; the SSIIa-A incurred a missense mutation and a frame shift mutation that resulted in premature protein termination. All the frame shift mutations, nonsense mutations and the Pinb novel allele resulted in allelic variation of their corresponding genes, which in turn affected their gene functions. The identified mutant lines can be used as intermediate materials in wheat quality improvement schemes.

Energy efficiency optimization of water pump based on heuristic algorithm and computational fluid dynamics

Wang Wenjie,Han Zhenhua,Pei Jin,Pavesi Giorgio,Gong Xiaobo,Yuan Shouqi 한국CDE학회 2023 Journal of computational design and engineering Vol.10 No.1

To reduce the energy consumption of large centrifugal pumps, modified heuristic intelligent algorithms are used to directly optimize the diffuser of centrifugal pumps. Considering the hydraulic efficiency under the design condition as the optimization target, in this study, 14 geometric parameters such as the inlet diameter, outlet diameter, and leading and trailing vane angles of the diffuser are selected as design variables, and the modified particle swam optimization and gravitational search algorithm are used to directly search for optimization in the design space. The performance and loss of internal entropy production of the different models before and after optimization are compared and analyzed in detail. The results show that the global optimization ability of the modified algorithm is improved. The diffuser model changes from cylindrical to twisted, the vane wrap angle increases, and the thickness of the leading edge decreases. Under the design condition, the efficiency of modified particle swarm optimization algorithm solution is increased by 2.75% and modified gravitational search algorithm solution by 2.21%, while the power remains unchanged. Furthermore, the optimization solution has the largest lift efficiency improvement under part-load conditions. After optimization, the unstable flow in the model is improved and internal entropy production loss is reduced significantly. The interior of the diffuser is dominated by turbulent entropy production and direct entropy production under different operating conditions, and the wall entropy production accounts for the smallest proportion.

Application of different surrogate models on the optimization of centrifugal pump

Wenjie Wang,Ji Pei,Shouqi Yuan,Jinfeng Zhang,Jian-Ping Yuan,Changzheng Xu 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.2

An optimization process for impellers was carried out based on numerical simulation, Latin hypercube sampling (LHS), surrogate model and Genetic algorithm (GA) to improve the efficiency of residual heat removal pump. The commercial software ANSYS CFX 14.5 was utilized to solve the Reynolds-averaged Navier-Stokes equations by using the Shear stress transport turbulence model. The impeller blade parameters, which contain the blade inlet incidence angle ∆β, blade wrap angle φ, and blade outlet angle β 2 , were designed by random sample points according to the LHS method. The efficiency predicted under the design flow rate was selected as the objective function. The best combination of parameters was obtained by calculating the surrogate model with the GA. Meanwhile, the prediction accuracies of three surrogate models, namely, Response surface model (RSM), Kriging model, and Radial basis neural network (RBNN), were compared. Results showed that the calculated findings agree with the experimental performance results of the original pump. The RSF model predicted the highest efficiency, while the RBNN had the highest prediction accuracy. Compared with the simulated efficiency of the original pump, the optimization increased efficiency by 8.34% under the design point. Finally, the internal flow fields were analyzed to understand the mechanism of efficiency improvement. The optimization process, including the comparison of the surrogate models, can provide reference for the optimization design of other pumps.

Soil Layer Disturbance Caused by Pipe Jacking: Measurement and Simulation of a Case Study

Wenjie Ma,Binglong Wang,Xu Wang,Shunhua Zhou,Bolin Wang 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.4

In this paper, areas of soil disturbed by pipe jack construction are categorized and analyzed in detail. Mechanisms of soil disturbance are discussed and patterns of soil deformation are studied using random medium theory. Lateral deformations in deep soil, pore water pressures, stratified settlement, and earth pressures are investigated using measurements from an electrical transmission pipeline project in China. The measurements show that soil layer movement can be predicted by monitoring changes in pore water pressure, and the amplitude of soil disturbance transverse to the pipeline is larger than that above the pipeline in this project. The distributions of stress components in the direction of, and vertical to, the pipeline axis are studied by numerical simulation. It shows that the closer to the pipeline axis, the greater the additional stress, the faster the attenuation speed, and the smaller the range of influence. Relationships of positive propulsion, friction, and stratum loss with longitudinal and transverse surface deformations are also discussed. The ground displacement is a coupling of the three factors to the action of the soil. The surface transverse subsidence with a main influence range of about ±4 D (D is outer diameter of pipe jacking). The findings from this study can be used as technical foundation and reference for the construction of similar projects.

The applicability study and validation of TULIP code for full energy range spectrum

Chen Wenjie,Du Xianan,Wang Rong,Zheng Youqi,Wang Yongping,Wu Hongchun 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.12

NECP-SARAX is a neutronics analysis code system for advanced reactor developed by Nuclear Engineering Computational Physics Laboratory of Xi’an Jiaotong University. In past few years, improvements have been implemented in TULIP code which is the cross-section generation module of NECP-SARAX, including the treatment of resonance interface, considering the self-shielding effect in non-resonance energy range, hyperfine group method and nuclear library with thermal scattering law. Previous studies show that NECP-SARAX has high performance in both fast and thermal spectrum system analysis. The accuracy of TULIP code in fast and thermal spectrum system analysis is demonstrated preliminarily. However, a systematic verification and validation is still necessary. In order to validate the applicability of TULIP code for full energy range, 147 fast spectrum critical experiment benchmarks and 170 thermal spectrum critical experiment benchmarks were selected from ICSBEP and used for analysis. The keff bias between TULIP code and reference value is less than 300 pcm for all fast spectrum benchmarks. And that bias keeps within 200 pcm for thermal spectrum benchmarks with neutronmoderating materials such as polyethylene, beryllium oxide, etc. The numerical results indicate that TULIP code has good performance for the analysis of fast and thermal spectrum system

스마트폰 뱅킹에서 서비스품질이 고객만족에 미치는 영향

왕문첩(Wenjie Wang),염창선(Chang-Sun Yum) 한국정보기술학회 2015 한국정보기술학회논문지 Vol.13 No.4

According to increasing sharply use of smartphone in the recent year, domestic banks are showing a lot of attention to service quality and customer satisfaction of smartphone banking for the success of the business. This paper is to find out and analyze the service quality factors of customer satisfaction as the critical success factors of smartphone banking. The result of this research shows that efficiency, fulfillment, and privacy have a significant positive influence on customer satisfaction. On the other hand system availability and empathy don’t have a significant positive influence on customer satisfaction. Customer satisfaction has a significant positive influence on loyalty. These research findings suggest the clue for making smartphone banking successful.

Ka-대역 QFN 패키지의 본딩 와이어 분석 및 설계

왕문걸(Wenjie Wang),강원실(Wonshil Kang),구현철(Hyunchul Ku) 한국전자파학회 2021 한국전자파학회논문지 Vol.32 No.11

본 논문에서는 Ka-대역 QFN(quad flat no-lead) 패키지에 사용되는 와이어 본딩 기법에서의 본딩 와이어의 전기적 특성을 분석하여 등가 모델을 제안하고, 그 유효성을 검증하였다. 본딩 와이어의 길이에 따른 인덕턴스와 저항 성분 변화 및 다중 본딩 와이어에서 발생하는 상호 인덕턴스를 고려하여 등가 모델을 개발하였다. 등가 모델의 각 소자 성분 값을 유도하기 위한 해석적 방법을 제시하고, 그 모델의 유효성을 검증하기 위하여 모델에서 유도된 S-파라미터 결과를 3차원 전자기 시뮬레이션 결과와 비교 제시하였다. 제안된 본딩 와이어 등가 모델을 이용하여 설계된 Ka-대역 QFN 패키지에서 반사 손실과 삽입 손실을 최적화한 본딩 와이어의 개수 및 길이를 도출하고, 이를 적용하여 QFN 패키지를 제작하고 S-파라미터 성능을 검증하였다. 설계 제작된 Ka-대역 QFN 패키지 본딩 와이어의 RF 특성이 29 GHz에서 S11(반사 손실)이 −26 dB, S21(삽입 손실)이 −1.8 dB의 성능을 보였으며, 모의실험 결과와 유사한 결과임을 확인하였다. In this study, an equivalent model of bonding wire used in the Ka-band quad flat no-lead (QFN) package was proposed. The proposed equivalent model was constructed using resistors and inductors according to the length of the bonding wire and the mutual inductance between the multi-bonding wires. For verification, the S-parameters derived from the equivalent model were compared with the three-dimensional (3D) electromagnetic simulation results. Moreover, a Ka-band QFN package was designed using the proposed equivalent model. The number and length of the bonding wires required to optimize the return loss (S11) and the insertion loss (S21) of the designed Ka-band QFN package were derived and applied. In the fabricated Ka-band QFN package, the S11 and S21 were measured to be −26 dB to −1.8 dB at 29 GHz, respectively, and it was confirmed that the measurement results were similar to the simulation results.

A green ultrasound-assisted enzymatic extraction method for efficient extraction of total polyphenols from Empetrum nigrum and determination of its bioactivities

Yuan Gao,Yutong Shi,Na Miao,Wenxin Xing,Cholil Yun,Shengfang Wang,Wenjie Wang,Huimei Wang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-

In this study, a green and efficient ultrasound-assisted enzymatic extraction (UAEE) method was establishedfor total polyphenols (TPP) extraction from E. nigrum aerial parts. Fractional Factorial design (FFD)was initially implemented for the selection of significant parameters affecting TPP yield and then Box-Behnken design-response surface methodology (BBD-RSM) was employed to optimize the parameters. The optimum extraction conditions for UAEE were as follows: incubation temperature of 38.39 ℃, incubationtime of 3.39 h, tannase of 386.53 U/g of sample (U/g), and cellulase of 224.42 U/g. Under the optimumconditions, the TPP yield was 52.17 ± 0.39 mg/g, which was 1.62 and 1.73 times those of themethods of ultrasound-assisted extraction (UAE) and enzyme-assisted extraction (EAE), respectively. The crude extract was purified by HPD-600 microporous resin, and the purity was improved from8.11% to 22.56%. In addition, the results of antioxidant and antibacterial activity assays showed thatthe purified extract has stronger bioactivities in contrast with the crude extract. This study indicated thatUAEE was an effective technique for the extraction of TPP from the aerial parts of E. nigrum, and TPPextracted by this extraction method could be applied in pharmaceuticals, cosmetics, and food industries.

Ferulic acid protects cardiomyocytes from TNF-a/cycloheximide-induced apoptosis by regulating autophagy

Chunxiao Li,Lu Chen,Min Song,Zhirui Fang,Lusha Zhang,Joel Wake Coffie,Liyuan Zhang,Lulu Ma,Qianyi Wang,Wenjie Yang,Leyu Fang,Shaoxia Wang,Xiumei Gao,Hong Wang 대한약학회 2020 Archives of Pharmacal Research Vol.43 No.8

Acute myocardial infarction (AMI) resultsin irreversible cardiac cell damage or death because ofdecreased blood fl ow to the heart. Apoptosis plays an importantrole in the process of tissue damage after myocardialinfarction (MI), which has pathological and therapeuticimplications. Ferulic acid (FA) is a phenolic acid endowedwith strong antioxidative and cytoprotective activities. Thepresent study aimed to investigate whether FA protectscardiomyocytes from apoptosis by regulating autophagy,which is a cellular self-digestion process, and one of thefi rst lines of defense against oxidative stress. Apoptosis wasinduced by TNF-α (10 ng/mL) and cycloheximide (CHX,5 μg/mL) in rat H9c2 cardiomyocytes. FA-inhibited TNF-α/CHX-induced apoptosis was determined by the quantifi cationof TUNEL-positive cells, and the eff ect was associatedwith decreased ROS production and inhibited caspase3activation. FA treatment enhanced autophagy and increasedautophagy-associated protein expression, leading to an inhibitionof mTOR signaling. When co-treated with 3-methyladenine(3-MA), an autophagy inhibitor, the anti-apoptoticeff ect of FA was attenuated. In an in vivo mouse MI model,FA treatment decreased the apoptotic cell number, reducedinfarct size, and improved cardiac performance, as determinedby histological and echocardiographic assessments. Taken collectively, these results suggest that FA could protectcardiomyocytes from apoptosis by enhancing autophagy.