A Study on the Economic Structure Development of the Xinji County Under the Background of Coordinated Development of Beijing, Tianjin and Hebei

Yaqian Zhang,박석재,Xin An 한국무역연구원 2020 무역연구 Vol.16 No.3

Purpose - The purpose of this study is to investigate the impact on China’s Beijing-Tianjin-Hebei coordinated development strategy policy, and to formulate economic structure development strategies for the county-level city, Xinji, in Hebei. Design/Methodology/Approach - This research uses the relevant Industrial Gradient Transfer Theory, Comparative Advantage Theory and Competitive Advantage Theory to find the position of the Hebei Province in this coordinated development. From the perspective of the economic structure of a county-level city, a fundamental economic unit in the Hebei Province, SWOT is used to analyze how it should connect to the coordinated development of Beijing, Tianjin and Hebei, making the results of the analysis more convincing. Findings - Industrial transfer in the Beijing-Tianjin-Hebei region is a significant strategy, and Hebei, which is in a relatively less developed economy, should adopt effective strategies. Through the industrial transfer of Beijing, Tianjin and Hebei, the non-capital function of Beijing can be extricated, resources can be better utilized, and the economic and spatial structure of Hebei can be modified more, thus exploring a new coordinated development of Beijing, Tianjin and Hebei. Research Implications - This paper explains the recent trend of increasing importance of Beijing-Tianjin-Hebei coordinated development. It also provides a new concept of economic structure for the Hebei which is in the lowest position of the economy and politics among the three synergy partners. This study attempts to provide a comprehensive development strategy for the economy of Xinji within the framework of economic structure development.

Effects of whole-plant corn and hairy vetch (Vicia villosa Roth) mixture on silage quality and microbial communities

Yaqian Zong,Kai Zhou,Xinhui Duan,Bo Han,Hua Jiang,Chenggang He Asian Australasian Association of Animal Productio 2023 Animal Bioscience Vol.36 No.12

Objective: Hairy vetch is considered to improve the nutritional value of corn because of its high protein and mineral levels. To better understand the mechanism underlying hairy vetch regulated whole-plant corn silage fermentation, this experiment investigated the fermentation quality and bacterial community of whole-plant corn and hairy vetch mixture. Methods: Whole-plant corn and hairy vetch were mixed at ratios of 10:0 (Mix 10:0), 8:2 (Mix 8:2), 6:4 (Mix 6:4), 4:6 (Mix 4:6), 2:8 (Mix 2:8), and 0:10 (Mix 0:10) on a fresh weight basis. After ensiling 60 days, samples were collected to examine the fermentation dynamics, ensiling characteristics, and bacterial communities. Results: Mix 0:10, Mix 2:8, and Mix 4:6 showed poor fermentation characteristics. Mix 8:2 and Mix 6:4 silages showed high quality, based on the low pH, acetic acid, and ammonia nitrogen levels and the high lactic acid, crude protein, and crude fat contents. The bacterial diversity was affected by the mixing ratio of the two forage species. The genus Lactobacillus dominated the bacterial community in Mix 10:0 silage, whereas with the addition of hairy vetch, the relative abundance of unclassified-Enterobacter increased from 7.67% to 41.84%, and the abundance of Lactobacillus decreased from 50.66% to 13.76%. Conclusion: The silage quality of whole-plant corn can be improved with inclusion levels of hairy vetch from 20% to 40%.

Low-temperature insertion bonding using electroless Cu-Co-P micro-cones array with controllable morphology

Yaqian Sun,Jing Wang,Xundi Zhang,Chenlin Yang,Anmin Hu,Tao Hang,Yunwen Wu,Huiqin Ling,Ming Li 대한금속·재료학회 2021 ELECTRONIC MATERIALS LETTERS Vol.17 No.6

At present, thermal compression bonding based on Cu and lead-free Sn based solder is often limited by high bonding temperature,which is higher than the melting point of solder (218 ℃). In this paper, we reported a low-temperature solid stateinsertion bonding method based on electroless Cu-Co-P micro-cones array. By adjusting the mass ratio of CuSO 4 ·5H 2 O andCoSO 4 ·7H 2 O, a series of Cu-Co-P micro-cones with diff erent morphologies were prepared. The Cu-Co-P micro-cones withhigher proportion of copper were sharper and denser and (111) orientation was also more. It was found that reducing theheight and density of micro-cones was conducive to achieve seamless bonding at lower temperature and force such as 170℃ and 750 gf. By optimizing the morphology of micro-cones, such as height, bottom diameter, vertex angle and density, theseamless and reliable bonding with high shear strength (39.9 MPa) could be achieved at 170 ℃ bonding temperature and1000 gf bonding force. The transmission electron microscopy results showed that intermetallic compounds including Cu 6 Sn 5and Cu 3 Sn existed at bonding interface, which indicated that signifi cant atomic diff usion had occurred between Cu-Co-Pmicro-cones and Sn based solder. Probable mechanisms for low-temperature insertion bonding were discussed.

Preparation and Characterization of Sisal Cellulose Nanocrystals-Assembled Film

Yaqian Peng,Yu Zhang,Zunyan Li,Helan Xu,Xiuliang Hou 한국섬유공학회 2023 Fibers and polymers Vol.24 No.9

Cellulose nanocrystals (CNCs) extracted from sisal by acid hydrolysis were used to prepare the film with a chiral nematic phase structure by evaporation-induced self-assembly method. The effects of different acid reaction times on the morphology of sisal CNCs and the optical and mechanical properties of CNC films were investigated. Transmission electron microscopy (TEM), surface charge, and scanning electron microscopy (SEM) analysis showed that as the reaction time of acid hydrolysis increased from 30 to 90 min, the surface charge of CNCs increased from 0.116 to 0.285 mmol g-1 and the average length decreased from 193.6 to 100.1 nm. Sisal CNCs can self-assemble to form the film with a chiral nematic phase structure by the evaporation-inducing method. The combination of the above two aspects resulted in an increase and then a decrease in the helical pitch of CNC films. UV-Vis spectra and polarized light (POM) analysis of the CNC films revealed that the change in helical pitch can affect the color change of CNC films from blue to red and then to yellow-green. The effects of different reaction times on the nanomechanical and macroscopic mechanical properties of CNC films are reported. At the reaction time of 60 min, the macroscopic mechanical properties of the CNC film were good with a tensile strength of 43.59 MPa. This research could provide a good option for the extraction and application of sisal CNCs and create higher value-added products of sisal.

Nezha

Liu Yaqian 한국콘텐츠학회 2015 ICCC International Digital Design Invitation Exhib Vol.2015 No.5

Give It Back With Both Hands

Zhao Yaqian 한국콘텐츠학회 2021 ICCC International Digital Design Invitation Exhib Vol.2021 No.8

A Novel Human Brainstem Map Based on True-Color Sectioned Images

YOU YAQIAN,박진서 대한의학회 2023 Journal of Korean medical science Vol.38 No.10

Background: Existing atlases for the human brainstem were generated from magnetic resonance images or traditional histologically stained slides, but both are insufficient for the identification of detailed brainstem structures at uniform intervals. Methods: A total of 319 sectioned images of the brainstem were selected from whole-body axial sectioned images, then coronal and sagittal sectioned images were reconstructed from the horizontal images. The fine and detailed structures were annotated in PowerPoint slides, then the volume model was produced and some white matter fibers were traced using MRIcroGL. Results: In this study, a novel brainstem atlas based on sectioned images was generated that shows the true color and shape, as well as the accurate location of the nuclei and tracts; it reveals the striking contrast between gray and white matter, as well as fine structures. In total, 212 structures, including nuclei and tracts, were annotated in axial, coronal, and sagittal plane views of sectioned images (48-bit true color; 0.2 mm intervals, 0.06 mm × 0.06 mm pixel size). To verify the accuracy of the annotations, a volume model of the brainstem was constructed for independent observations of the three planes. Conclusion: In this paper, we describe several interesting structures included in the atlas. By depicting the fine structures of the human brainstem in detail, this atlas allows comprehensive understanding of the complicated topographies of the brainstem. As such, it will be of value for neuroanatomy education and research, in addition to enriching the literature on the human brain.

엽록체 DNA 염기서열에 근거한 물여뀌 종집단(마디풀과)의 분류학적 연구

Gao Yaqian,Gauri Shankar Bhandari,박진희,박종욱 한국식물분류학회 2013 식물 분류학회지 Vol.43 No.1

마디풀과의 물여뀌 종집단(Polygonum amphibium L. complex)은 육상 및 수중 환경 모두에 서식할 수 있는 분류군으로, 서식 환경에 따라 다양한 형태 변이를 나타내어 현재까지 많은 분류군들이 기재되어 왔다. 아시아 및 북미산 107개체로부터 측정한 11개 형태형질을 사용하여 주성분분석을 수행한 결과, 본 종집단에서 존재하는 수생형 및 육생형 개체들은 모든 지역집단에서 잎의 형태 및 크기, 엽병의 길이 등에 의해 서로 구분되는 것으로 나타났다. 그러나, 동일 개체군 또는 동일 지역내에서 채집된 수생형과 육생형 개체들은 엽록체 DNA 4개 구간(matK, psbA-trnH IGS, rbcL-accD IGS, trnL-trnF)에서 완전히 동일한 염기서열을 공유하는 것으로 밝혀져 유전적으로는 분기되지 않은 것으로 추정되며, 따라서 본 종집단에서 나타나는 생육형간의 형태적 차이는 서식지 환경에 따른 개체 변이인 것으로 판단된다. 형태분석 및 엽록체 4구간 염기서열 유합자료의 계통분석 결과, 한국, 일본, 중국, 몽골, 극동 러시아 지역 등에 분포하는 아시아산 개체들은 북미지역집단 개체들 및 유럽의 영국산 개체와 형태적, 유전적으로 뚜렷이 구분되는 것으로 밝혀졌으며, 따라서 한반도산 개체들을 포함하는 아시아 지역집단 개체들은 P. amphibium의 하나의 변종(P. amphibium var. amurense Korsh.)으로 인식하는 것이 타당한 것으로 판단된다. The Polygonum amphibium complex (Poygonaceae) is a highly polymorphic taxon that can grow in aquatic environments as well as in moist terrestrial habitats. Aquatic and terrestrial plants of the P. amphibium complex vary significantly in morphology and exhibit very complicated patterns of morphological variation, resulting in the description of numerous infra-specific taxa. Principal components analysis of 107 individuals of the P. amphibium complex from Asia and North America using 11 morphological characters showed that the aquatic plants can be discerned from the terrestrial plants by leaf size, shape, and petiole length. In contrast, both aquatic and terrestrial plants collected from the same population or locality shared identical sequences in the matK, psbA-trnH IGS, rbcL-accD IGS and trnL-trnF regions of the chloroplast DNA (cpDNA), suggesting that aquatic and terrestrial forms of the P. amphibium complex are not genetically diverged; morphological differences between the two forms are probably due to the differences in environmental conditions of the habitats. In addition, results from the morphological analysis and the maximum parsimony analysis of the cpDNA data set revealed that the plants from Asia including Korea, Japan, China, Mongolia and Russia Far East are diverged from those in North America and Europe, suggesting that the Asian populations should be recognized as a distinct variety, P. amphibium var. amurense Korsh.

Correlation Between Different Antidiarrheal Treatments and Changes in Chemical Components of Allii Sativi Bulbus Before and After Steaming Treatment Based on Flora Sequencing and In Vitro Experiments

Yarong Li,Yaqian Zhou,Huanjin Liu,Chenxu Wei,Shuli Chen,Zhengying Hua,Yan Xu,Yu Wu,Weidong Li 한국식품영양과학회 2022 Journal of medicinal food Vol.25 No.10

We investigated the changes in the main active ingredients and pharmacodynamic differences in the therapeutic effect of garlic before and after steaming and the correlation between them. The main active ingredients in raw garlic products (RGPs) and steamed garlic products (SGPs) were determined by high-pressure liquid chromatography and ultraviolet spectroscopy. Acute rapid diarrhea (AD) and antibiotic-induced diarrhea (DD) models were established in rats, and each group was treated with RGP and SGP, respectively. The main chemical components of garlic changed before and after steaming. Garlicin and alliinase were only found in RGP, whereas only alliin was found in SGP. Both RGP and SGP contained garlic polysaccharides. For in vivo experiments on AD, the average rate of loose stools was 100.00 ± 0.00, 31.55 ± 11.76, and 19.14 ± 6.62 in the RGP high-dose and SGP high-dose treatment groups, respectively; in DD, the rates were 91.11 ± 14.40, 19.33 ± 3.63, and 30.56 ± 4.30, respectively (P < .01, treatment vs. model groups). In AD, the average grade of loose stools was 2.33 ± 0.52 and 1.83 ± 0.75 in the model and RGP high-dose treatment groups, respectively (P < .05); in DD, the values were 2.17 ± 0.41 in the model group and 1.67 ± 0.52 in the SGP high-dose treatment group (P < .05). RGP had a better therapeutic effect on AD, mainly related to the antibacterial effect of garlicin in RGP. SGP had a better therapeutic effect on DD, mainly related to the alliin and garlic polysaccharide in SGP. This study could provide evidence to support the clinical use of garlic.

Fourier transform of anisotropic mixed-norm Hardy spaces with applications to Hardy--Littlewood inequalities

Jun Liu,Yaqian Lu,Mingdong Zhang 대한수학회 2022 대한수학회지 Vol.59 No.5

Let $\vec{p}\in(0,1]^n$ be an $n$-dimensional vector and $A$ a dilation. Let $H_A^{\vec{p}}(\mathbb{R}^n)$ denote the anisotropic mixed-norm Hardy space defined via the radial maximal function. Using the known atomic characterization of $H_{A}^{\vec{p}}(\mathbb{R}^n)$ and establishing a uniform estimate for corresponding atoms, the authors prove that the Fourier transform of $f\in H_A^{\vec{p}}(\mathbb{R}^n)$ coincides with a continuous function $F$ on $\mathbb{R}^n$ in the sense of tempered distributions. Moreover, the function $F$ can be controlled pointwisely by the product of the Hardy space norm of $f$ and a step function with respect to the transpose matrix of $A$. As applications, the authors obtain a higher order of convergence for the function $F$ at the origin, and an analogue of Hardy--Littlewood inequalities in the present setting of $H_A^{\vec{p}}(\mathbb{R}^n)$.