Science Discovery

Volume 9, Issue 4, August 2021

  • Interpretation of Chinese and American Guidelines for Diagnosis and Treatment of Thyroid Diseases During Pregnancy

    Jiang Bohua, Tao Xinli, Ouyang Zhenbo, Yan Jiane

    Issue: Volume 9, Issue 4, August 2021
    Pages: 133-138
    Received: Apr. 06, 2021
    Accepted:
    Published: May 24, 2021
    Downloads:
    Views:
    Abstract: More and more studies have found that thyrotoxicosis and hypothyroidism are related to adverse pregnancy outcomes, and maternal thyroid diseases also have a certain impact on fetal development. Drugs used to treat maternal hyperthyroidism can pass through the placenta and affect fetal thyroid development and thyroid function, and may cause fetal de... Show More
  • Exploration on the Evaluation of Guangdong's Marine Ecological Resources Asset Value

    Wu Yuxi, Wang Yi

    Issue: Volume 9, Issue 4, August 2021
    Pages: 139-144
    Received: Apr. 17, 2021
    Accepted:
    Published: May 24, 2021
    Downloads:
    Views:
    Abstract: Ecological resources as maintenance system components essential human survival environment, due to its special shape has so far failed to incorporated into the national economic accounting system, to avoid unreasonable under accelerate the Marine resource utilization policy leads to the deterioration of the ecological sustainability further excessi... Show More
  • Research on Clock Circuit Electromagnetic Emission Test and Suppression

    Bai Yijie, Wu Shengnan

    Issue: Volume 9, Issue 4, August 2021
    Pages: 145-149
    Received: Apr. 20, 2021
    Accepted:
    Published: Jun. 04, 2021
    Downloads:
    Views:
    Abstract: Clock circuit is an important part of PCB, which is usually composed of crystal oscillator, crystal oscillator control chip and capacitor. Electromagnetic emission generated by clock circuit is one of the main interference sources of electronic equipment. According to the different transmission paths, electromagnetic interference caused by clock ci... Show More
  • Effect of HMB on Phase Angle of Maintenance Hemodialysis Patients

    Liang Qingyue, Wang Zhong, Zong Xueping, Diao Yanqing, Cai Ping, Li Honglie, Hu Liping

    Issue: Volume 9, Issue 4, August 2021
    Pages: 150-154
    Received: Mar. 06, 2021
    Accepted:
    Published: Jun. 04, 2021
    Downloads:
    Views:
    Abstract: Objective To observe and evaluate the effect of β- hydroxy-β- methylbutyric acid (HMB) on phase angle (PA) in maintenance hemodialysis (MHD) patients. Methods From March 2018 to August 2019, 64 patients who received maintenance hemodialysis, at Chengdu Fifth People's Hospital, were selected as subjects, and they were divided into experimental group... Show More
  • The Effect Observation of Lianhua Qingwen Granule in the Adjuvant Treatment of Community Acquired Pneumonia (CAP)

    Xia Jianzhen, Shi Tongxia, Cao Wenli

    Issue: Volume 9, Issue 4, August 2021
    Pages: 155-159
    Received: Apr. 12, 2021
    Accepted:
    Published: Jun. 04, 2021
    Downloads:
    Views:
    Abstract: Objective To observe the efficacy of Lianhua Qingwen Granule in the adjuvant treatment of community-acquired pneumonia (CAP). Methods From March 2018 to January 2020, adult patients with CAP who visited the internal medicine clinic of community health service center of Minzu University of China were divided by a random code list into two groups: th... Show More
  • Research on the Power Tracking Control of Permanent Manget Synchronous Wind Turbine with Losses Considered

    Liu Fei, Gao Shujing, Ren Minmin

    Issue: Volume 9, Issue 4, August 2021
    Pages: 160-170
    Received: Apr. 17, 2021
    Accepted:
    Published: Jun. 04, 2021
    Downloads:
    Views:
    Abstract: For the permanent magnet synchronous wind generator, a control method based on losses minimization is proposed, in order to solve the problem of the maximum wind energy tracking control, which often neglects the generator losses caused by the deviation between the actual working point and the optimal power point, and leads to the output power loss.... Show More
  • Preliminary Analysis of Contamination in Liver Preservation Solution and Prophylaxis for Post-transplant Infection

    Zhao Jiqiang, Zhao Jiquan, Huo Feng, Wang Shaping, Zheng Yujian

    Issue: Volume 9, Issue 4, August 2021
    Pages: 171-177
    Received: Apr. 22, 2021
    Accepted: Jun. 04, 2021
    Published: Jun. 09, 2021
    Downloads:
    Views:
    Abstract: Objective To discuss the preservation solution (PS) contamination and initial experience of liver transplantation from organ donation by citizens after death and initial experience. Methods The 78 liver transplant recipients were divided into positive group and negative group based on the finding of the culture of PS. The positive group received th... Show More
  • The Influence of Axial Compression Ratio on the Seismic Behavior of RC Frame Column

    Liu Yang, Gong Maosheng, Zuo Zhanxuan

    Issue: Volume 9, Issue 4, August 2021
    Pages: 178-183
    Received: Apr. 27, 2021
    Accepted: Jun. 04, 2021
    Published: Jun. 09, 2021
    Downloads:
    Views:
    Abstract: In order to analyze the quantitative influence of the axial compression ratio on the seismic performance of reinforced concrete (RC) frame column, this paper carried out the numerical analysis of the quasi-static simulation of a RC frame column and analyzed its hysteresis performance, bearing capacity, stiffness degradation, energy consumption capa... Show More
  • Experimental Study on Seismic Behavior of RC Frame Beam Column Joints

    Shen Zhaoyi, Gong Maosheng, Zuo Zhanxuan, Zhang Hao

    Issue: Volume 9, Issue 4, August 2021
    Pages: 184-189
    Received: Apr. 30, 2021
    Accepted: Jun. 10, 2021
    Published: Jun. 22, 2021
    Downloads:
    Views:
    Abstract: Strong columns and weak beams and "strong joints and weak members" are important concepts in the design of reinforced concrete ductile frame structures. However, many earthquake damages show that a large number of reinforced concrete frame structures still do not guarantee the realization of the above seismic concepts. In order to solve this proble... Show More
  • Design and Implementation of Auto-calibration Ozone Concentration Analyzer with Double Optical Cells

    Wu Juan, Chi Ying, Feng Dong Fang, Song Ting Shan

    Issue: Volume 9, Issue 4, August 2021
    Pages: 190-193
    Received: May 06, 2021
    Accepted: Jun. 25, 2021
    Published: Jul. 09, 2021
    Downloads:
    Views:
    Abstract: Ozone pollution control has become the focus of air pollution control at this stage and even during the 14th Five Year Plan period, so it is more and more important to measure ozone concentration precisely. In this paper, based on the measurement principle of ozone concentration by ultraviolet photometry, the ozone has characteristic absorption of ... Show More
  • Research Status of Impact on Concrete Structures

    Zhang Chaofeng, Guan Zhongguo

    Issue: Volume 9, Issue 4, August 2021
    Pages: 194-199
    Received: Jun. 26, 2021
    Accepted: Jul. 14, 2021
    Published: Jul. 15, 2021
    Downloads:
    Views:
    Abstract: Concrete is currently the most widely used material in civil engineering structures. In addition to being subjected to dead loads and live loads during its service, it may also encounter accidental loads such as impacts and collisions. Previous research has shown that the forced characteristics of concrete structures under dynamic loads such as imp... Show More
  • Experimental Study on Soil Electrical Conductivity Inversion by Ground Spectral Measurement and SAR Data

    Yin Chengshen, Liu Quanming, Wang Chunjuan, Wang Fuqiang

    Issue: Volume 9, Issue 4, August 2021
    Pages: 200-205
    Received: Jul. 16, 2021
    Accepted: Aug. 13, 2021
    Published: Aug. 23, 2021
    Downloads:
    Views:
    Abstract: In this paper, the ground-measured spectral reflectance was combined with C-band microwave radar quadrupolarized backscattering data, and the characteristic bands were selected using partial least squares and correlation coefficient methods, and a model was developed to evaluate the degree of soil salinization. Using the spectral reflectance and it... Show More