One new species and one new record species of Cerapteroceroides Ashmead (Hymenoptera: Encyrtidae) from China

Guo‐Hao Zu,Cheng-De LI 한국곤충학회 2017 Entomological Research Vol.47 No.5

Cerapteroceroides acutiscapus sp. nov. is described as new and Cerapteroceroides manaliensis Hayat and Khan, 2015 is first recorded from China.

Two new species and one new record species of Rhopus (Hymenoptera: Encyrtidae) from China, with a key to Chinese species

Guo‐Hao Zu,Cheng-De LI 한국곤충학회 2015 Entomological Research Vol.45 No.5

Rhopus antennalis sp. nov. and R. qingdaoensis sp. nov. are described as new to science and R. nigroclavatus (Ashmead, 1902) is first recorded from China. A key to all the known Chinese species of the genus also presented.

Principle of and Protection of Man-in-the-middle Attack Based on ARP Spoofing

Hao, Guo,Tao, Guo Korea Information Processing Society 2009 Journal of information processing systems Vol.5 No.3

Man-in-the-middle attack is used wildly as a method of attacking the network. To discover how this type of attack works, this paper describes a method of man-in-the-middle attack based on ARP spoofing, and proposes a method of preventing such attacks.

Growth of Human Colon Cancer Cells in Nude Mice is Delayed by Ketogenic Diet With or Without Omega-3 Fatty Acids and Medium-chain Triglycerides

Hao, Guang-Wei,Chen, Yu-Sheng,He, De-Ming,Wang, Hai-Yu,Wu, Guo-Hao,Zhang, Bo Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.5

Background: Tumors are largely unable to metabolize ketone bodies for energy due to various deficiencies in one or both of the key mitochondrial enzymes, which may provide a rationale for therapeutic strategies that inhibit tumor growth by administration of a ketogenic diet with average protein but low in carbohydrates and high in fat. Materials and Methods: Thirty-six male BALB/C nude mice were injected subcutaneously with tumor cells of the colon cancer cell line HCT116. The animals were then randomly split into three feeding groups and fed either a ketogenic diet rich in omega-3 fatty acids and MCT (MKD group; n=12) or lard only (LKD group; n=12) or a standard diet (SD group; n=12) ad libitum. Experiments were ended upon attainment of the target tumor volume of $600mm^3$ to $700mm^3$. The three diets were compared for tumor growth and survival time (interval between tumor cell injection and attainment of target tumor volume). Results: The tumor growth in the MKD and LKD groups was significantly delayed compared to that in the SD group. Conclusions: Application of an unrestricted ketogenic diet delayed tumor growth in a mouse xenograft model. Further studies are needed to address the mechanism of this diet intervention and the impact on other tumor-relevant parameters such as invasion and metastasis.

The strength analysis and probabilistic design of a bogie frame with incomplete probabilistic information

Hao Lu,Changyi Wang,Haibao Guo,Hao Lv,Yimin Zhang 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.3

A bogie frame is a key component of high-speed rail; higher requirements of the safety and stability of the bogie frame are put forward with the continuous improvement of the train speed. In this study, we first performed a strength analysis of a bogie frame according to the JIS E 4207 standard by using finite element method. Then, we did a reliability analysis of the bogie frame. The reliability problems are defined as strength reliability and resonant frequency reliability, which indicate the structural safety and stability of the bogie frame. The reliability estimation is realized by experimental design, artificial neural network and stochastic perturbation theory. Additionally, reliability-based sensitivity indices were derived to measure the parameter importance of random input variables. An illustrative example of the bogie frame with incomplete probabilistic information was used to demonstrate the applications of the proposed method for reliability and reliability-based sensitivity estimation in terms of strength and resonant frequency reliability. The results indicate that vertical loads and the material density have more of an impact on reliability than other variables of the bogie frame.

Research on the Usability of information Positioning Interaction Method in Instant Messaging App

Hao Yue Guo,반영환,Hui Liu,Tao Luo 대한인간공학회 2022 大韓人間工學會誌 Vol.41 No.3

Objective: This paper investigates an interaction method for quickly finding a target message in an instant messaging app and uses usability testing to determine whether this interaction method improves usability. Background: With the development of Internet technology and the widespread use of social media, instant messaging apps have become a must-have app for everyone. Due to this convenience, users need to deal with a large amount of information every day and searching and filtering consume a lot of time. It is necessary to study new interaction methods to solve problems. Method: Analyzed the structure of the focus area of the instant messaging app message lookup, identified problematic points and designed a new interaction method and prototype. Conducted usability evaluation of the old and new interaction methods using objective methods. 1) Designed experiments and questionnaires around three aspects of usability, effectiveness, efficiency, and user satisfaction. 2) Recruited testers to conduct tests. 3) Performed statistical analysis of the obtained data. Results: The efficiency and user experience of the new interaction method can be greatly improved, and the learning cost is low. The new interaction method significantly reduces the disadvantage of increasing the number of messages affecting the finding time. No matter how many messages it takes only about 6 seconds. Conclusion: With the increase of users' message processing, how to improve the search efficiency directly affects the user's satisfaction. In order to further expand the applicable groups and usage scenarios, it seems that further research and exploration are needed. Application: Based on the results of this study, there can be a faster way to find the interaction of messages in instant messaging apps. It provides a reference for future design of chat applications with gestures on touch screens. It is also to further increase the value of heuristic evaluation in usability studies. Importantly, it creates new methods of interaction and confirms the possibility.

A Calculation Method for the Nonlinear Crowbar Circuit of DFIG Wind Generation based on Frequency Domain Analysis

Hao Luo,Mingyao Lin,Yang Cao,Wei Guo,Li Hao,Peng Wang 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.5

The ride-through control of a doubly-fed induction generator (DFIG) for the voltage sags on wind farms utilizing crowbar circuits by which the rotor side converter (RSC) is disabled has being reported in many literatures. An analysis and calculation of the transient current when the RSC is switched off are of significance for carrying out the low voltage ride through (LVRT) of a DFIG. The mathematical derivation is highlighted in this paper. The zero-state and zero-input responses of the transient current in the frequency domain through a Laplace transformation are investigated, and the transient components in the time domain are achieved. With the characteristics worked out from the linear resolving without modeling simplification, the selection of the resistance in the linear crowbar circuit and the value conversion from a linear circuit to a nonlinear one is proposed to setup the attenuation rate. In terms of grid code requirements, the theoretical analysis for the time constant of the transient components attenuation insures the controllability when the excitation of the RSC is resumed and it guarantees the reserved time for the response of the reactive power compensation. Simulations are executed in MATLAB/SIMPOWER and experiments are carried out to validate the theoretical analysis. They indicate that the calculation method is effective for selection of the resistance in a crowbar circuit for LVRT operations.

Separation and Purification of Antioxidant Peptide from Fermented Whey Protein by Lactobacillus rhamnosus B2-1

Hao Guo,Lei Fan,Lin Ding,Wenqin Yang,Chuangang Zang,Hong Guan 한국축산식품학회 2023 한국축산식품학회지 Vol.43 No.1

In this study, a antioxidant activity peptide fraction was separated and purified from metabolites of whey protein fermented by Lactobacillus rhamnosus B2-1. The fermentation sample was separated by macroporous resin D101 and Sephadex G-15. The collected fractions were tested for antioxidant and antitumor activities. In order to test the antioxidant activity of fractions, Hydroxyl (·OH), 2,2'-azino-bis (3-ethylbenzothiazoline-6- sulfonic acid (ABTS), and Oxygen Radical Absorbance Capacity (ORAC) were used. The final purified peptide B11 showed highest ABTS and ·OH radical scavenging rate by 84.36±1.89% and 62.43±2.64%, respectively, and had an ORAC activity of 1,726.44± 2.76 μM Trolox equivalent/g. Further, the inhibitory effect of B11 on the proliferation of LoVo human colon cancer cells, KB and Cal-27 human oral cancer cells were enhanced with increasing concentrations of B11. B11 contains 51.421% amino acids, with Glu and Asp being the major constituents. In this study, we obtained peptide fraction B11 with antioxidant activity, which is promising for development.

Physicochemical and Sensory Characterization of Ginger-juice Yogurt during Fermentation

Guo-Hao Yang,Jun-Jun Guan,Jin-Shui Wang,Haicheng Yin,Fa-Dong Qiao,Feng Jia 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.6

The primary purpose of this study was to investigate the effects of a ginger (Zingiber ofcinale) juice addition to milk on the physicochemical and sensory properties and consumer acceptability of yogurt during fermentation. Under the presence of ginger juice at 2.0 to 10.0%(v/v), there was a significant influence (p<0.05) on the viability of characteristic microorganisms in yogurt,the pH, titratable acidity (ºSH), viscosity, and hardness of the products. The descriptive data showed significant differences (p<0.05) among the samples for all attributes. The consumer results from external preference mapping indicated that samples with the lower ginger juice (≤4%)were liked over the higher samples (≥6%), with a negative impact on the acceptance by the consumers. Therefore,these findings suggest that 4%(v/v) may be the more appropriate content of ginger juice in the preparation of ginger-juice yogurt.

An Automatic Urban Function District Division Method Based on Big Data Analysis of POI

( Hao Guo ),( Haiqing Liu ),( Shengli Wang ),( Yu Zhang ) 한국정보처리학회 2021 Journal of information processing systems Vol.17 No.3

Along with the rapid development of the economy, the urban scale has extended rapidly, leading to the formation of different types of urban function districts (UFDs), such as central business, residential and industrial districts. Recognizing the spatial distributions of these districts is of great significance to manage the evolving role of urban planning and further help in developing reliable urban planning programs. In this paper, we propose an automatic UFD division method based on big data analysis of point of interest (POI) data. Considering that the distribution of POI data is unbalanced in a geographic space, a dichotomy-based data retrieval method was used to improve the efficiency of the data crawling process. Further, a POI spatial feature analysis method based on the mean shift algorithm is proposed, where data points with similar attributive characteristics are clustered to form the function districts. The proposed method was thoroughly tested in an actual urban case scenario and the results show its superior performance. Further, the suitability of fit to practical situations reaches 88.4%, demonstrating a reasonable UFD division result.