Complete Genome Sequencing of Bacillus velezensis WRN014, and Comparison with Genome Sequences of other Bacillus velezensis Strains

( Junru Wang ),( Juyuan Xing ),( Jiangkun Lu ),( Yingjiao Sun ),( Juanjuan Zhao ),( Shaohua Miao ),( Qin Xiong ),( Yonggang Zhang ),( Guishan Zhang ) 한국미생물생명공학회(구 한국산업미생물학회) 2019 Journal of microbiology and biotechnology Vol.29 No.5

Bacillus velezensis strain WRN014 was isolated from banana fields in Hainan, China. Bacillus velezensis is an important member of the plant growth-promoting rhizobacteria (PGPR) which can enhance plant growth and control soil-borne disease. The complete genome of Bacillus velezensis WRN014 was sequenced by combining Illumina Hiseq 2500 system and Pacific Biosciences SMRT high-throughput sequencing technologies. Then, the genome of Bacillus velezensis WRN014, together with 45 other completed genome sequences of the Bacillus velezensis strains, were comparatively studied. The genome of Bacillus velezensis WRN014 was 4,063,541bp in length and contained 4,062 coding sequences, 9 genomic islands and 13 gene clusters. The results of comparative genomic analysis provide evidence that (i) The 46 Bacillus velezensis strains formed 2 obviously closely related clades in phylogenetic trees. (ii) The pangenome in this study is open and is increasing with the addition of new sequenced genomes. (iii) Analysis of single nucleotide polymorphisms (SNPs) revealed local diversification of the 46 Bacillus velezensis genomes. Surprisingly, SNPs were not evenly distributed throughout the whole genome. (iv) Analysis of gene clusters revealed that rich gene clusters spread over Bacillus velezensis strains and some gene clusters are conserved in different strains. This study reveals that the strain WRN014 and other Bacillus velezensis strains have potential to be used as PGPR and biopesticide.

Influence of High Temperature Pre-Deformation on the Dissolution Rate of Delta Ferrites in Martensitic Heat-Resistant Steels

Junru Li,Jianjun Liu,Bo Jiang,Chaolei Zhang,Yazheng Liu 대한금속·재료학회 2017 METALS AND MATERIALS International Vol.23 No.2

The dissolution process of delta ferrites and the influence of high temperature pre-deformation on the dissolutionrate of delta ferrites in martensitic heat-resistant steel 10Cr12Ni3Mo2VN were studied by isothermalheating and thermal simulation experiments. The precipitation temperature of delta ferrites in experimentalsteel is about 1195 °C. M23C6-type carbides incline to precipitate and coarsen at the boundaries of delta ferritesbelow 930 °C, and can be rapidly dissolved by heating at 1180 °C. The percentage of delta ferrites graduallydecreases with heating time. And a Kolmogorov-Johnson-Mehl-Avrami equation was established to describethe dissolution process of delta ferrites at 1180 °C. High temperature pre-deformation can markedly increasethe dissolution rate of delta ferrites. Pre-deformation can largely increase the interface area between delta ferriteand matrix and thus increase the unit-time diffusing quantities of alloying elements between delta ferritesand matrix. In addition, high temperature pre-deformation leads to dynamic recrystallization and increases thenumber of internal grain boundaries in the delta ferrites. This can also greatly increase the diffusing rate ofalloying elements. In these cases, the dissolution of delta ferrites can be promoted.

The Novel Efficient Dual-field FIPS Modular Multiplication

( Tingting Zhang ),( Junru Zhu ),( Yang Liu ),( Fulong Chen ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.2

The modular multiplication is the key module of public-key cryptosystems such as RSA (Rivest-Shamir-Adleman) and ECC (Elliptic Curve Cryptography). However, the efficiency of the modular multiplication, especially the modular square, is very low. In order to reduce their operation cycles and power consumption, and improve the efficiency of the public-key cryptosystems, a dual-field efficient FIPS (Finely Integrated Product Scanning) modular multiplication algorithm is proposed. The algorithm makes a full use of the correlation of the data in the case of equal operands so as to avoid some redundant operations. The experimental results show that the operation speed of the modular square is increased by 23.8% compared to the traditional algorithm after the multiplication and addition operations are reduced about (s²-s)/2, and the read operations are reduced about s²-s, where s=n/32 for n-bit operands. In addition, since the algorithm supports the length scalable and dual-field modular multiplication, distinct applications focused on performance or cost could be satisfied by adjusting the relevant parameters.

Theoretical research on the propagation of the crack normal to and dwelling on the interface of the cermet cladding material structure

Yang Junru,Song Chuanjuan,Wang Minglan,Zhang Yuekan,Sun Jing 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.1

The interface crack propagation problem in the cermet cladding material structure was studied. A comparative propagation propertyparameter (CP) suitable to judge the propagation direction of the interface crack in the cermet cladding material structure was proposed. The interface crack propagation criterion was established. Theoretical models of the CPs for the crack normal to and dwelling on theinterface deflecting separately into the clad, the interface and the substrate were built, and the relations between the CPs and the loadaction angle, the clad thickness ratio and the load were investigated with an example. The research results show that, under the researchconditions, the interface crack will more easily propagate into the clad layer than into the substrate.

Design and implementation of smart bartender system based on Arduino UNO

Wang Junkai,Zhang Jiaxuan,Zhou Xuyun,Cui Shuyu,Huang Junru,Qiu Ziehen,Feng Zunhao,In Soo Lee 한국정보기술학회 2021 Proceedings of KIIT Conference Vol.2021 No.11

본 발명품은 Arduino UNO를 사용하여 설계한 바텐딩 제어 시스템을 채용한 것으로서 주요 기능은 전자밸브와 펌프의 공동 작동을 통해 모든 음료의 토핑 재료를 정확하게 추출하여 혼합하여 생산하며, 수출 상단에는 LED와 음향을 장착하여 시각 및 청각 효과를 더욱 좋게 하였으며, 바텐더의 도움 없이도 가정에서 사용할 수 있다. With the development of intelligent electronic technology, newly smart machine technology comes true. This paper mainly use Arduino UNO to design a control system of the current blender, the main function of the system is to accurately control the ingredient of each drink through the peristaltic pump control circuit and relay circuit, the wine is modulated by the mixing mechanism, For better visual and acoustic effects, LED and sound are added above the reclaiming port. Through the order system to select drinks without the intervention of the staff, the equipment is in the state of no sales.

Direct Power Control without Current Sensors for Nine-Switch Inverters

Pan, Lei,Zhang, Junru,Wang, Kai,Wang, Beibei,Pang, Yi,Zhu, Lin The Korean Institute of Power Electronics 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.1

Recently, the nine-switch inverter has been proposed as a dual output inverter. To date, studies on the control strategies for NSIs have been mostly combined with their application. However, in this paper, a mathematical model and control strategy for nine-switch inverters has been proposed in view of the topology. A switching function model and equivalent circuit model of a nine-switch inverter have been built in ${\alpha}{\beta}$ coordinates. Then, a novel current observer with an improved integrator is proposed based on the switching function model, and a direct power control strategy is proposed. No current sensors are used in the proposed strategy, and only two voltage sensors are employed. The performance of the proposed control method is verified by simulation and experimental results.

Direct Power Control without Current Sensors for Nine-Switch Inverters

Lei Pan,Junru Zhang,Kai Wang,Beibei Wang,Yi Pang,Lin Zhu 전력전자학회 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.1

Recently, the nine-switch inverter has been proposed as a dual output inverter. To date, studies on the control strategies for NSIs have been mostly combined with their application. However, in this paper, a mathematical model and control strategy for nine-switch inverters has been proposed in view of the topology. A switching function model and equivalent circuit model of a nine-switch inverter have been built in αβ coordinates. Then, a novel current observer with an improved integrator is proposed based on the switching function model, and a direct power control strategy is proposed. No current sensors are used in the proposed strategy, and only two voltage sensors are employed. The performance of the proposed control method is verified by simulation and experimental results.

An Experimental Study on the Correlation between Composite Lining Stiffness and Bearing Capacity in Soft Ground

Jimeng Feng,Hui Jiang,Junru Zhang,Longping Yu,Ping Zhou 대한토목학회 2023 KSCE JOURNAL OF CIVIL ENGINEERING Vol.27 No.1

The composite lining is intended to be stiff and strong, based on the current design guidance, to carry the designated load alone in the long-term operation. However, according to the latest research, the temporary support is supposed to carry load even under the undesired circumstance of serious deterioration, and it is contentious whether thicker lining is favorable for tunnel durability or not. A series of model tests were conducted in this study, therefore, to develop the correlation between lining stiffness and tunnel durability. In the tests, the test box, consisting of surrounding earth, temporary support and lining, is considered as an integrated structure to carry the load transferred from the upper, through which composite lining is represented. Eight conditions were designed by changing the stiffness of the temporary support and the lining. The test results from experimental data analysis (e.g. failure process, lining displacement and internal force) show that the more flexible the lining is and the stiffer the temporary support is, the more durable the condition becomes At the same time, the imperfect contact between the temporary support and the lining greatly weakens the carrying capacity of the whole structure.