Study on the Technology of Digital Recognition in Verification Process of Mechanical and Electronic Anemometer

Jianying Fan,An Wang,Yang Gao,Lei Yu 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.4

Mechanical behavior of composite gel periodic structures with the pattern transformation

Jianying Hu,Yuhao He,Jincheng Lei,Zishun Liu,Somsak Swaddiwudhipong 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.50 No.5

When the periodic cellular structure is loaded or swelling beyond the critical value, the structure may undergo a pattern transformation owing to the local elastic instabilities, thus leading to structural collapse and the structure changing to a new configuration. Based on this deformation-triggered pattern, we have proposed the novel composite gel materials. This designed material is a type of architectural material possessing special mechanical properties. In this study, the mechanical behavior of the composite gel periodic structure with various gel inclusions is studied further through numerical simulations. When pattern transformation occurs, it results in a different elastic relationship compared with the material at untransformed state. Based on the obtained nominal stress versus nominal strain behavior, the Poisson‟s ratio and corresponding deformed structure patterns, we investigate the performance of designed composite materials and the effects of the uniformly distributed gel inclusions on composite materials. A better understanding of the characteristics of these composite gel materials is a key to develop its potential applications on new soft machines.

Research on the Design of CORDIC Vector Magnitude Calculator by using Model-Based Design

Jianying Cao,Xiaoxia Zheng,Yang Nie 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.12

Vector magnitude calculation is significant in the QR-algorithm by Coordinate Rotation Digital Computer (CORDIC), which is increasingly used in adaptive applications. However, its hardware implementation is extremely difficult. In this paper, a fixed point CORDIC system is constructed to compute the magnitude of a vector by using Model-Based Design. The simulation results show that the proposed method of CORDIC vector magnitude calculator is not only simple in structure and easy to implement, and can improve the speed of operation with good scalability.

Experimental and numerical investigation of heat transfer characteristics in a square channel with various truncated ribs

Jianying Gong,Xiong Zhang,Junxiong Zeng,Tieyu Gao,Weifeng Wu 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.8

Oblique ribs are widely applied to the internal cooling of turbine blades to promote the heat transfer between blade wall and coolant. In this study, the effect of several new types of truncated ribs on the heat transfer characteristics in 45° oblique rib channels is investigated experimentally and numerically. The numerical results obtained by the SST k-ω turbulence model agree well with the experimental data for the Reynolds number ranging from 10000 to 60000. The results indicate a significant entrance effect on the heat transfer in truncated rib channels. The numerical results show that ribs continuously truncated at 3.8 mm gives the best heat transfer performance among the newly truncated ribs. Compared with the original structure, the Nusselt number and heat transfer enhancement factor of newly truncated ribs increased by 24.6 % and 17.8 %, respectively. Concurrently, the friction factor is reduced by 5.1 %.

Contrastive experimental study on heat transfer and friction characteristics in steam cooled and air cooled rectangular channels with rib turbulators

Jianying Gong,Tieyu Gao,Guojun Li 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.9

The present experiment compares the heat transfer and friction characteristics in steam cooled and air cooled rectangular channels(simulating a gas turbine blade cooling passage) with two opposite rib-roughened walls. The Reynolds number (Re) whose length scale isthe hydraulic diameter of the passage is set within the range of 10000-60000. The channel length is 1000 mm. The pitch-to-rib heightratio, the channel aspect ratio and the channel blockage ratio is 10, 0.5 and 0.047, respectively. It is found that the average Nu, the averagefriction coefficient, and the heat transfer performance of both steam and air in the ribbed channels show almost the same changetrend with the increase of Re. Under the same test conditions, the average Nu of steam is 30.2% higher than that of air, the average frictioncoefficient is 18.4% higher, and the heat transfer performances of steam on the ribbed and the smooth walls are 8.4% and 7.3%higher than those of air, respectively. In addition, semi-empirical correlations for the two test channels are developed, which can predictthe Nu under the given test condition. The correlations can be used in the design of the internal cooling passage of new generation steamcooledgas turbine blade/vane.

Heat transfer and friction characteristics in steam cooled rectangular channels with rib turbulators

Jianying Gong,Tieyu Gao,Guojun Li 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.1

We studied the heat transfer and friction characteristics in steam-cooled rectangular channels with rib turbulators on W side or H sidewalls in the Reynolds number (Re) range of 10000-80000. Each of the test channels was welded by four stainless steel plates to simulatethe actual geometry and heat transfer structure of blade/vane internal cooling passage. The length of the channel L was 1000 mm, thecross section of the channel was 40 mm × 80 mm, and the pitch-to-rib height ratio p/e was kept at 10. The channel blockage ratio (W/H)was 0.047. Results showed that the Nusselt number (Nu) distributions displayed different trends at the entrance region with the increaseof Re for the rib turbulators on the W side walls. The heat transfer performance of the rib turbulators on the H side walls was about 24-27% higher than that on the W side walls at the same pumping power. In addition, semi-empirical correlations for the two cases, rib turbulatorson W side walls and rib turbulators on H side walls, were developed based on the heat transfer results, which could be used in thedesign of the internal cooling passage of new generation steam-cooled gas turbine blade/vane.

Kinetic Investigations of RAFT Polymerization: Difunctional RAFT Agent Mediated Polymerization of Methyl Methacrylate and Styrene

Jianying Ma,Hui Xuan Zhang 한국고분자학회 2015 Macromolecular Research Vol.23 No.1

A difunctional reversible addition-fragmentation transfer (RAFT) agent, S,S′-bis (α,α′-dimethylacetic acid)trithiocarbonate (BDAT) is synthesized and used as chain transfer agent (CTA) to mediate homopolymerization ofmethyl methacrylate (MMA) and random copolymerization of methyl methacrylate-styrene (St) system, respectively. Kinetic factors of these two polymerizations, which influence polymerization process and characteristics ofpolymers, are investigated. Experimental results show that molecular weights of polymers increase linearly withmonomer conversions and these two polymerization kinetics behaviors exhibit “controlled/living” characteristics. Forthe homopolymerization of MMA, molecular weights increase gradually and are close to their theoretical values. Wherever, for the random copolymerization of MMA-St system, the presence of St has important influence on thekinetics of copolymerization. Addition of St to this system induces an induction period and this period increase withincreasing content of St in monomer composition.

The influence of starting powder characteristics on the performance of MoSi2-based heating elements

Jianying Gao 한양대학교 세라믹연구소 2013 Journal of Ceramic Processing Research Vol.14 No.3

The influence of starting powder characteristics, involving purity and particle size, on the properties and performance of MoSi2-based heating elements was investigated in this study. Compared to a fine powder, densification of the green rods with a coarse powder should be carried out at a higher temperature. This creates a Mo5Si3 layer with a poor capability of a protective SiO2 film formation on the surface. Another negative impact of the high densification temperature is that the rods cannot be bent to a U-shape due to the coarse crystal size. The critical damage temperature of a heating element is significantly influenced by the purity of the starting powder. Impurities will deteriorate the performance of a heating element by decreasing the critical damage temperature.

Design of Test Platform for Concentrator based on Virtual Electric Energy Meter

Jianying Fan,Hui Sun,Yang Wang,Dongqing Shi 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.9

For the current test of concentrator relay routing learning function in the laboratory, based on the hardware cost and the deployment environment, unable to realize large-scale electric energy meter group network, and real scene environment cannot be simulated. In order to solve these problems, the design of test platform for concentrator based on virtual electric energy meter is proposed in this paper. The design aims to simulate the communication routing network algorithm of electric energy meter and help the communication instruction to establish an optimal topology network which through using the specified data source, target source and the route address. So the concentrator can get the specific data through this preset network. This paper have also observed and analyzed the hierarchy order topology and compared with the autonomous learning topology of the concentrator relay routing algorithm. Then verify the deviation between communication routing topology and preset value, and eliminate the deviation. At the same time, verify whether the relay routing algorithm can get the optimal communication topology network.

刑事速裁案件集中审理的正当性 及其保障

Jianying Zhang,김영진 단국대학교 법학연구소 2018 법학논총 Vol.42 No.4

The trial work of criminal quick-adjudication procedure carried out well and achieved remarkable results; at the same time, it also caused problems. Since it is an experimental reform, a series of exploratory practices have appeared in practice, among which centralized adjudication is one of them. "centralized hearing" means that the same group of public prosecutors and judges deal with many different cases in turn in the same time period in order to avoid the cumbersome procedure caused by the respective court sessions, in order to improve the efficiency of adjudication. The facts are clear, the evidence is sufficient, the suspect or defendant has no objection to the fact of the crime, and the penalty is lighter, so the case can be dealt with. The same cases are heard in a centralized manner. The centralized adjudication procedure can fill the loophole of our country's summary procedure effectively. On the one hand, the examination and approval of criminal summary procedure is too cumbersome. Meeting discussion system, leading examination and approval system seriously reduced the work efficiency of summary procedure cases. On the other hand, the legal documents of summary procedure are too complicated, which results in too much time for the clerical work and increases the burden on the case handlers. Furthermore, the suitable criminal procedure can effectively solve the difficult situation of speeding up the summary procedure, and make the judicial resources shift from the equal allocation to the differentiated allocation. However, the lower rate of application of the procedure and The voluntary nature of the defendant's confession is difficult to obtain effective protection and so on. There are also structural defects in the start-up and transformation mechanism. The root cause is the fuzziness of the basis of its construction-justification. Therefore, this paper first investigates and analyzes the first-line experience of the centralized adjudication procedure in each pilot area, and obtains the practical basis of its legitimacy. Secondly, with the popularization of summary procedure and rapid adjudication procedure and the expansion of the scope of application of the legal provisions, the necessity of centralized adjudication procedure is obtained. Finally, combining with the diversion mechanism from the source of the case on the basis of practice, the crime of applying the premise to the procedure of quick adjudication is committed. The mechanism of voluntary admission of guilt and punishment and the procedure to ensure the rights and interests of criminal suspects and defendants are from three angles: the initiation and transformation mechanism of the rights and interests of suspects and defendants; This paper puts forward three supporting measures to guarantee the feasibility of centralized adjudication of the speedy adjudication procedure, with the intention of providing a theoretical basis for realizing the legitimacy of the application of the criminal fast-adjudication procedure, and then improving the applicable rate of the criminal fast-adjudication procedure. 刑事速裁程序试点工作推行效果良好, 成绩显著;同时, 也暴漏了问题。因是一 项试验性改革, 实践中出现了有助于促进其推行的系列探索性做法, 对刑事速裁案 件实施集中审理就是其中之一。“集中审理”是指在同一时间段内由同一拨公诉人、 法官就多个不同的案件依次进行处理, 避免分别开庭引发的程序繁琐, 旨在提高裁 判效率。适用速裁程序审理的案件, 事实清楚、证据充分、犯罪嫌疑人或被告人对 犯罪事实无异议, 并且判处刑罚较轻, 故可以对案由相同的案件采用集中审理的方 式。刑事速裁程序集中审理能有效的填补中国刑事诉讼简易程序的漏洞。一方面, 刑事诉讼简易程序的审批环节过于繁琐。会议讨论制、领导审批制严重降低了简易 程序案件的工作效率。另一方面, 简易程序的法律文书也过于复杂, 导致办案人员 在文字工作上消耗了太多时间, 增加了办案人员的负担。再者, 刑事速裁程序的适 行, 能够有效解决简易程序提速难的困境, 使得司法资源由平均分配转向区别配 置。但是, 程序适用率较低以及被告人认罪的自愿性难以得到有效保障等问题同样 不容忽视, 这同样也暴漏出速裁程序启动与转化机制存在结构性缺陷等问题。究其 根本原因系其建构基点——正当化依据的模糊不清。由此本文首先考察分析各试点 地区刑事速裁程序集中审理的一线经验, 得出其正当性的实践依据。其次概括性分 析中国目前随着刑事诉讼简易程序和刑事速裁程序的推广使用和法律规定适用范围 之扩大, 得出速裁程序集中审理之必要性。最终, 结合实践基础从案件源头之分流 机制, 速裁程序适用前提之犯罪嫌疑人自愿认罪认罚机制和确保犯罪嫌疑人、被告 人权益的程序启动和转化机制三大角度;提出保障速裁程序集中审理的可行性的三 大配套措施, 意图为实现刑事速裁程序适用的正当性提供理论依据, 进而提高其适 用率。