Revitalization and Re-cultivation of Vegetation in Karst Region Through Animal

Zhiqiang Lai,Xian-feng Yi,Na Yao,Xiao-Yan Cai,Yongliang Liang,Shize Qin,Yuanrong Chen,Shangmin Qin,M. Pogaonik 한국초지조사료학회 2009 한국초지조사료학회 학술대회논문집 Vol.2009 No.08

From 2002 to 2007, two different systems (shrubs and grasses) were established to raise appropriate ruminants for the purpose of improving biological diversity and fragile ecological environment in the karst-areas through grazing. The objective was to find out a novel way to promote the application of ecological restoration and reconstruction, and the agricultural economy could develop in sustainable way in the karst areas in Guangxi and similar areas in Southwest China.

Facile Synthesis, Characterization, Nanocrystal Growth and Photoluminescence Properties of GeS Nanowires

Zhiqiang Lai,YAN-JIE GUO,Peihui Yang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.12

As a IV–VI semiconductor, GeS is winning wide attention for its excellent properties. However, few examples of GeS nanostructures, especially those with photoluminescence (PL) properties, have been reported. After the optimization of reaction conditions, including time and temperature, the GeS nanowires with PL properties are synthesized via a green, facile hydrothermal route without using any toxic reagent. These materials are characterized by transmission and scanning electron microscopy (TEM and SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), etc. With the average diameter of ~200 nm and the length ranging from 1–25 µm, the resulting GeS nanowires have relatively smooth surface and round top, and are oriented along [100] facet. The growth mechanism of GeS nanowires is investigated, and the understanding of their growth mechanism could provide helpful guidance for designing experimental conditions rationally to synthesize nanowires. Due to their special nanostructure, these nanowires possess very good fluorescent properties, which indicates that these nanowires have potential to apply in future optical nanodevices.

Online Integrated Development Environment for MapReduce Programming

Zhiqiang Ma,Shuangtao Yang,Zhida Shi,Rui Yan 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.6

Though MapReduce programming model simplifies the development of parallel program, ordinary users have difficulties in setting up the development environment for MapReduce. The online integrated development environment for MapReduce programming can solve this problem, thus users need not build the environment themselves, only need to focus on the logical design of the parallel program. During the software construction, the problem of independent space setting and naming conflict of the file in the multi-user environment, and the problem of online compiling, execution and instant feedback message to client are solved. The software has been deployed and tested in Hadoop cluster, and can meet users’ basic requirements for the development of MapReduce.

A wireless decentralized control experimental platform for vibration control of civil structures

Yan Yu,Luyu Li,Xiaozhi Leng,Gangbing Song,Zhiqiang Liu,Jinping Ou 국제구조공학회 2017 Smart Structures and Systems, An International Jou Vol.19 No.1

Considerable achievements in developing structural regulators as an important method for vibration control have been made over the last few decades. The use of large quantities of cables in traditional wired control systems to connect sensors, controllers, and actuators makes the structural regulators complicated and expensive. A wireless decentralized control experimental platform based on Wi-Fi unit is designed and implemented in this study. Centralized and decentralized control strategies as sample controllers are employed in this control system. An optimal control algorithm based on Kalman estimator is embedded in the dSPACE controller and the DSP controller. To examine the performance of this control scheme, a three-story steel structure is developed with active mass dampers installed on each floor as the wireless communication platform. Experimental results show that the wireless decentralized control exhibits good control performance and has various potential applications in industrial control systems. The proposed experimental system may become a benchmark platform for the validation of the corresponding wireless control algorithm.

Effect of Longitudinal Magnetic Field on CMT Welding of Al-Alloy

Peilei Zhang,Zhiqiang Liu,Hua Yan,Zhishui Yu 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.12

A longitudinally varying magnetic field (MF) was applied during cold metal transfer (CMT) welding of Al alloys. The effectof MF on the welding process, macrostructure, microstructure and properties of weld beads was studied. The results showedthat the application of MF led to arc expansion and rotation, the droplet transfer frequency decreased, the droplet volumebecame larger, and the droplets deflected. When the coil current was between 0 and 5 A, the weld beads porosity decreasedfrom 4.47 to 0.26%. And when the coil current was increased to 8 A, the porosity of weld beads also increased to 2.84%. MFreduced the weld depth, wetting angle and weld reinforcement, and increased weld width. With the increase of coil current,the width of primary dendrite arms decreased from 7.75 to 5.01 μm. The area occupied by the Al–Si eutectic was enlarged,and the eutectic was refined. It was also found that the MF slightly increased the hardness of the weld beads, and the hardnessdistribution was more uniform.

Heteroatom‑doped porous carbon derived from covalent organic framework for high performance supercapacitor applications

Yuzhu Xing,Yan Dong,Jifan Zhao,Zhiqiang Zhang,Yue Wang 한국탄소학회 2023 Carbon Letters Vol.33 No.6

In recent years, supercapacitors have attracted extensive attention due to their advantages such as fast charge and discharge rate, high power density and long cycle life. Because of its unique porous structure and excellent electrochemical properties, heteroatom-doped porous carbon (HPC) is deemed as a promising electrode material for supercapacitors. However, it is a great challenge to synthesize electrode materials with large surface area, ultra-high porosity and good electrochemical performance. In this work, two-dimensional conjugated microporous polymers (CMPs) containing ketones were synthesized by a simple one-step coupling reaction and used as carbon precursors. A series of samples (CMP-Ts) were prepared with the procedures of coupling reaction and carbonization. The optimized carbon material has high specific surface area (up to 2229.85 m2 g? 1), porous structure, high specific capacitance (375 F g? 1 at 0.5 A g? 1), and good cycling stability (capacitance retention of 98.8% after 1000 cycles at 5 A g? 1). Further, the supercapacitor has an energy density of 28.8 Wh kg? 1 at a power density of 5000 W kg? 1. This work lays a foundation for the preparation of carbon materials using microporous polymer as a precursor system, provides a new way of thinking, and demonstrates a great potential of high-performance supercapacitors.

Comparison between laparoscopic and abdominal radical hysterectomy for stage IB1 and tumor size <2 cm cervical cancer with visible or invisible tumors: a multicentre retrospective study

Pengfei Li,Lan Chen,Yan Ni,Jiaqi Liu,Donglin Li,Jianxin Guo,Zhihua Liu,Shuangling Jin,Yan Xu,Zhiqiang Li,Lu Wang,Xiaonong Bin,Jinghe Lang,Ping Liu,Chunlin Chen 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.2

Objective: To compare 5-year disease-free survival (DFS) and overall survival (OS) rates oflaparoscopic radical hysterectomy (LRH) and abdominal radical hysterectomy (ARH) forstage IB1 and tumor size <2 cm with visible or invisible tumors. Methods: We retrospectively compared the oncological outcomes of 1,484 cervical cancerpatients with IB1 and tumor size <2 cm on final pathology, who received ARH (n=899) or LRH(n=585) between January 2004 and December 2016. Patients were divided into visible tumorsubgroup (ARH: n=668, LRH: n=444) and invisible tumor subgroup (ARH: n=231, LRH:n=141) according to tumor type. Results: LRH and ARH showed similar 5-year DFS and OS rates (93.3% vs. 93.1%, p=0.997;96.2% vs. 97.5%, p=0.351) in total study population. LRH was not associated with worse5-year DFS rate (hazard ratio [HR]=0.96; 95% confidence interval [CI]=0.58–1.58; p=0.871)or OS rate (HR=1.37; 95% CI=0.65–2.89; p=0.409) by multivariable analysis. In the visibletumor subgroups, LRH and ARH showed similar 5-year DFS and OS rates (91.9% vs. 91.9%,p=0.933; 95.0% vs. 96.9%, p=0.276), and LRH was not associated with worse 5-year DFS orOS rate (p=0.804, p=0.324). In the invisible tumor subgroups, LRH and ARH also showedsimilar 5-year DFS and OS rates (97.3% vs. 97.1%, p=0.815; 100% vs. 99.5%, p=0.449), andLRH was not associated with worse 5-year DFS rate (p=0.723). Conclusions: Among patients with stage IB1 and tumor size <2 cm, whether the tumor isvisible or not, the oncological outcomes of LRH and ARH among cervical cancer patients arecomparable. This suggests that LRH may be suitable for stage IB1 and tumor size <2 cm withvisible or invisible tumors.Trial Registration: International Clinical Trials Registry Platform Identifier: CHiCTR180017778

THE DESIGN OF CONTROL SYSTEM FOR THE MAGNETIC BEARING

Jin Yongde,Zhou Yan,Long Zhiqiang 대한전자공학회 1991 ICEIC:International Conference on Electronics, Inf Vol.1991 No.8

Putative multiple reaction monitoring strategy for the comparative pharmacokinetics of postoral administration Renshen-Yuanzhi compatibility through liquid chromatography-tandem mass spectrometry

Yufei Sun,Guifang Feng,Yan Zheng,Shu Liu,Yan Zhang,Zifeng Pi,Fengrui Song,Zhiqiang Liu 고려인삼학회 2020 Journal of Ginseng Research Vol.44 No.1

Background: Exploring the pharmacokinetic (PK) changes of various active components of single herbs and their combinations is necessary to elucidate the compatibility mechanism. However, the lack of chemical standards and low concentrations of multiple active ingredients in the biological matrix restrict PK studies. Methods: A putative multiple reaction monitoring strategy based on liquid chromatography coupled with mass spectrometry (LC-MS) was developed to extend the PK scopes of quantification without resorting to the use of chemical standards. First, the compounds studied, including components with available reference standard (ARS) and components lacking reference standard (LRS), were preclassified to several groups according to their chemical structures. Herb decoctions were then subjected to ultrahigh-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry analysis with appropriate collision energy (CE) in MS² mode. Finally, multiple reaction monitoring transitions transformed from MS² of ultrahigh-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry were used for ultrahigh-performance liquid chromatography coupled with triple quadrupole mass spectrometry to obtain the mass responses of LRS components. LRS components quantification was further performed by developing an assistive group-dependent semiquantitative method. Results: The developed method was exemplified by the comparative PK process of single herbs Radix Ginseng (RG), Radix Polygala (RP), and their combinations (RG-RP). Significant changes in PK parameters were observed before and after combination. Conclusion: Results indicated that Traditional Chinese Medicine combinations can produce synergistic effects and diminish possible toxic effects, thereby reflecting the advantages of compatibility. The proposed strategy can solve the quantitative problem of LRS and extend the scopes of PK studies.

Comparison among methods of effective energy evaluation of corn silage for beef cattle

Wei, Ming,Chen, Zhiqiang,Wei, Shengjuan,Geng, Guangduo,Yan, Peishi Asian Australasian Association of Animal Productio 2018 Animal Bioscience Vol.31 No.6

Objective: This study was conducted to compare different methods on effective energy evaluation of corn silage for beef cattle. Methods: Twenty Wandong bulls (Chinese indigenous yellow cattle) with initial body weight of $281{\pm}15.6kg$, were assigned to 1 of 5 dietary treatments with 4 animals per treatment in a randomized complete block design. Five dietary treatments included group 1 with corn silage only diet, group 2 with corn silage-concentrate basal diet (BD) and 3 groups with 3 test diets, which were the BD partly substituted by corn silage at 10%, 30%, and 60%. The total collection digestion trial was conducted for 5 d for each block after a 10-d adaptation period, and then an open-circuit respiratory cage was used to measure the gas exchange of each animal in a consecutive 4-d period. Results: The direct method-derived metabolizable energy and net energy of corn silage were 8.86 and 5.15 MJ/kg dry matter (DM), expressed as net energy requirement for maintenance and gain were 5.28 and 2.90 MJ/kg DM, respectively; the corresponding regression method-derived estimates were 8.96, 5.34, 5.37, and 2.98 MJ/kg DM, respectively. The direct method-derived estimates were not different (p>0.05) from those obtained using the regression method. Using substitution method, the nutrient apparent digestibility and effective energy values of corn silage varied with the increased corn silage substitution ratio (p<0.05). In addition, the corn silage estimates at the substitution ratio of 30% were similar to those estimated by direct and regression methods. Conclusion: In determining the energy value of corn silage using substitution method, there was a discrepancy between different substitution ratios, and the substitution ratio of 30% was more appropriate than 10% or 60% in the current study. The regression method based on multiple point substitution was more appropriate than single point substitution on energy evaluation of feedstuffs for beef cattle.