Science Discovery

Volume 7, Issue 1, February 2019

  • Development Trend and Application of Star Soil Sampler Impact Mechanism Technology

    Lu Mingyu, Zhang Ming, Liu Shuo, Zhang Xingwang

    Issue: Volume 7, Issue 1, February 2019
    Pages: 1-8
    Received: Dec. 06, 2018
    Accepted:
    Published: Feb. 01, 2019
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    Abstract: With the development of global space technology, technologies of planet soil detection, sampler and return will become more and more important in the field of deep space exploration in the future. The space environment detection and sampling tasks in deep space exploration have the characteristics of high vacuum, low gravity, intense temperature ch... Show More
  • Application of Intermediate Length Catheter in Palliative Treatment of Tumor

    Hengyu Cai, Qi Jiang, Qun Lou, Yixuan Wang, Hongyan Guo

    Issue: Volume 7, Issue 1, February 2019
    Pages: 9-12
    Received: Jan. 17, 2019
    Accepted:
    Published: Mar. 08, 2019
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    Abstract: Today’s society,tumors have become the number one killer treateningt the well-being of human beings.At present,China swollen and persistent disease rises every year.Bring a heavy burden on family and society.Although the treatment is becoming more and more popular,it is still the main cause of death and chronic colouring disease.In particular,it is... Show More
  • Research Progress of Exosome Non-coding RNA in Cancer

    Jiajia Jin, Shengrong Wu, Xiaoyan Lu, Zixiao Huang, Mei’e Jia, Xiangyi He

    Issue: Volume 7, Issue 1, February 2019
    Pages: 13-17
    Received: Jan. 26, 2019
    Accepted:
    Published: Mar. 08, 2019
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    Abstract: Exosomes, secreted by both normal cells and tumor cells, are small membrane vesicle bodies that presented in saliva, blood, urine and other body fluids. The proteins, lipids, non-coding RNA and other components in exosomes functioned profoundly in cell communication and signal transduction, and tumor-derived exosomes can activate various signaling ... Show More
  • Reliability Analysis of Safety Critical Computer System Considering Common Cause Failure

    Zhao Deliang, Xu Hongze

    Issue: Volume 7, Issue 1, February 2019
    Pages: 18-23
    Received: Mar. 07, 2019
    Accepted:
    Published: Mar. 08, 2019
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    Abstract: The rail transit operation control system and nuclear reactor control system are extremely high for safety and reliability, especially the high speed maglev of more than 600 kilometers per hour. Therefore, the effect of common cause failure on the reliability of safety critical computer must be considered.The safety critical system is the key of th... Show More
  • The Teaching Reform of Plastic Molding Process and Mold Design

    Ren Yanxia, Jin Fengfeng, Cui Pei, Qin Guofang, Sun Haiyan Haiyan

    Issue: Volume 7, Issue 1, February 2019
    Pages: 18-21
    Received: Jan. 19, 2019
    Accepted:
    Published: Mar. 08, 2019
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    Abstract: This paper introduces the reform of the course "plastic Molding Technology and Mould Design" in the aspects of class form, course content, teaching mode, teaching means, examination method and so on. Through the reform of the above aspects, the theoretical study can be closely combined with the practical contents such as UG mold design, mold disass... Show More
  • Rational Critique of the Genome Editing Infants Event

    Zhai Jiancai, Mei Lin, Song Tonglin, Zhang Xiaolin, Huang Jun

    Issue: Volume 7, Issue 1, February 2019
    Pages: 22-25
    Received: Jan. 17, 2019
    Accepted:
    Published: Apr. 28, 2019
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    Abstract: Genome editing is a new technology in BME and will be widely used in medicine. The birth of genome-edited babies has resulted in serious adverse consequences, for disobeying the international consensus that gene-editing embryos should not be used for pregnancy purposes, disregarding the existing laws and ethical norms of our country, ignoring the s... Show More
  • The Functional Dysconnectivity Within the Emotion Regulation System Is Associated with Anhedonia in Major Depressive Disorder

    Zongling He, Fengmei Lu, Huafu Chen

    Issue: Volume 7, Issue 1, February 2019
    Pages: 26-31
    Received: Feb. 22, 2019
    Accepted:
    Published: Apr. 28, 2019
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    Abstract: Objective: The neuro-pathphysiological abnormalities of Major Depressive Disorder (MDD) have been reported to be distributed in emotion regulation system, involving the prefrontal cortex, limbic and subcortical nuclei[8]. Anhedonia is recognized as a hallmark of MDD. Characterizing the aberrant functional connectivity (FC) within this system and ex... Show More
  • Study on the Dynamic Prediction Method of ECD in Horizontal Well Drilling

    Ma Xianming, Guan Zhichuan, Luo Ming, Li Wentuo, Pan Rui

    Issue: Volume 7, Issue 1, February 2019
    Pages: 32-38
    Received: Jan. 11, 2019
    Accepted:
    Published: Apr. 28, 2019
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    Abstract: Well pressure and ECD control is one of the most important things in horizontal well drilling. This paper establish horizontal borehole pressure and ECD management considered seaside, temperature, drill pipe eccentric, drill pipe rotation and cutting bed though research horizontal well drilling. Sensitive factors like drill fluid density, drill flu... Show More
  • Establishment of Wellbore Temperature Field During High Temperature and High Pressure Well Cementing in Western South China Sea

    Pan Rui, Guan Zhichuan, Luo Ming, Ma Xianming, Wang Kai, Wang Bin

    Issue: Volume 7, Issue 1, February 2019
    Pages: 39-44
    Received: Jan. 18, 2019
    Accepted:
    Published: Apr. 28, 2019
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    Abstract: The western part of south China sea is characterized by high geothermal gradient, abnormal overpressure development and narrow formation pressure window in the deep part of the basin. In the process of cementing, the annulus has high pressure consumption, high risk of leakage, and significant influence of temperature on the rheology and hydration o... Show More
  • Lowpass Filter with Wide Stopband Based on T-Shaped Resonator Loaded Step-Impedance Hairpin Resonator

    Zhong Lunjie, Zuo Qiliang, Xu Jinping

    Issue: Volume 7, Issue 1, February 2019
    Pages: 45-49
    Received: Apr. 19, 2019
    Accepted:
    Published: May 23, 2019
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    Abstract: A lowpass filter with wide stopband based on stepped impedance hairpin resonator is proposed. Multiple transmission zeros are created in the stopband region by different size T-shaped resonator to achieve wide stopband. A lowpass filter with 3dB cutoff frequency (fc) at 3.2GHz is designed, simulated and fabricated. Experimental results indicate tha... Show More
  • Design of an E-band Power Dividing/Combining Network Based on H-Plane 3dB Directional Couplers

    Chen Peng, Wan Peng, Xu Jinping

    Issue: Volume 7, Issue 1, February 2019
    Pages: 50-55
    Received: Apr. 19, 2019
    Accepted:
    Published: May 23, 2019
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    Abstract: In this paper, an E-band four-channel power dividing/combining network is designed based on H-plane 3dB waveguide directional couplers. Firstly, the waveguide H-plane 3dB directional coupler with working frequency of 71~78GHz is designed by HFSS to achieve low loss and high isolation. According to the phase relationship of each port of the coupler,... Show More
  • Application of Full Digital Simulation Test Environment in Aerospace Software Testing

    Xue Shuai, Zhao Long, Hu Xiaoxi

    Issue: Volume 7, Issue 1, February 2019
    Pages: 56-60
    Received: Apr. 22, 2019
    Accepted:
    Published: May 23, 2019
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    Abstract: With the significant increase in the degree of informationization of spacecraft, higher requirements are placed on the reliability of aerospace software. Therefore, the position of software testing in the software development cycle is particularly important. The current software testing environment has significant limitations for achieving high rel... Show More