Rheological Phase Synthesis of Er-Doped LiV3O8 as Electroactive Material for a Cathode of Secondary Lithium Storage

Ling-Ling Xie,Yuan-Dong Xu,Jie-Jie Zhang,Cheng-Peng Zhang,Xiao-Yu Cao,Ling-Bo Qu 대한금속·재료학회 2013 ELECTRONIC MATERIALS LETTERS Vol.9 No.4

Er-doped LiV3O8 as cathode material for secondary lithium batteries was prepared through a rheological phase reaction method. The as-prepared materials were investigated by x-ray diffraction (XRD), scanning electron microscopy (SEM), and galvanostatic discharge/charge measurements. The results indicate that Er doped phase preserves the layered structure of the pristine LiV3O8 and has an enlarged interlayer spacing. Compared to LiV3O8 sample, Er-doped LiV3O8 sample displays more uniform particles and large surface area. The electrochemical test shows that Er doping does not change the process of Li+ insertion/deinsertion. Er-doped LiV3O8 electrode exhibits an initial discharge capacity of 294.2 mAh g−1 and maintains a stable capacity of 220.7 mAh g−1 after 50 cycles, indicating a greatly improved good cycleability comparing with the undoped one.

An Optimal Random Carrier Pulse Width Modulation Technique Based on a Genetic Algorithm

Jie Xu,Zi-Ling Nie,Jun-Jie Zhu 전력전자학회 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.2

Since the carrier sequence is not reproducible in a period of the random carrier pulse width modulation (RCPWM) and a higher harmonic spectrum amplitude is likely to affect the quality of the power supply. In addition, electromagnetic interference (EMI) and mechanical vibration will appear. To solve these problems, this paper has proposed an optimal RCPWM based on a genetic algorithm (GA). In the optimal modulation, the range of the random carrier frequency is taken as a constraint and the reciprocal of the maximum harmonic spectrum amplitude is used as a fitness function to decrease the EMI and mechanical vibration caused by the harmonics concentrated at the carrier frequency and its multiples. Since the problems of the hardware make it difficult to use in practical engineering, this paper has presented a hardware system. Simulations and experiments show that the RCPWM is effective. Studies show that the harmonic spectrum is distributed more uniformly in the frequency domain and that there is no obvious peak in the wave spectra. The proposed method is of great value to research on RCPWM and integrated power systems (IPS).

Signal Transformed Internal Model Control for Non-raster Scanning of Piezo-actuated Nanopositioning Stages

Jie Ling,Zhao Feng,Min Ming,Zhao Guo,Xiaohui Xiao 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.8

This paper proposes a new signal transformed internal model control (STIMC) scheme for non-raster scanning patterns of piezo-actuated nanopositioning stages. To smooth the scanning signals superimposed with a ramp or time-varying amplitudes, a signal transformation operator is calculated to convert the references into standard harmonic waveforms. An inverse transformation operator is then added in the control loop to generate the driving signals. For the contained internal model control (IMC) design, an H∞ mixed-sensitivity method is utilized for the first order internal mode synthesis. A second and a third internal modes are included in the IMC for alleviating residual high-frequency errors resulted from the nonlinearity of hysteresis. To verify the proposed STIMC scheme, comparative experiments with conventional IMC are conducted based on a nanopositioning platform. Results prove that the STIMC is effective on non-raster signals’ tracking. A same tracking precision for Lissajous scanning can be obtained by STIMC compared with IMC. An improvement of larger than 50% and 80% of root-mean-square errors can be obtained for cycloid and spiral scanning patterns, respectively.

Damping Controller Design for Triangular Scanning of a Third-Order Nanopositioning Stage

Jie Ling,Tingting Ye,Zhao Feng,Min Ming,Xiaohui Xiao 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10

In this paper, a design procedure of damping controller for third-order nanopositioning stage is presented for high-speed triangular scanning. Conventionally, damping control schemes of integral resonant control (IRC) and resonance-shifted IRC (RS-IRC) are designed providing that a second-order model can be identified for a nanopositioning stage. For a third-order system, existing control schemes cannot be applied directly. For this, a pole-zero cancellation technique is presented to design IRC scheme. In addition, a state observer based pole placement technique is proposed for RS-IRC design. The effectiveness of the proposed design procedures is demonstrated through both simulations and experiments based on a piezo-actuated nanopositioning stage platform. Results show that a closed-loop bandwidth of 156 Hz and 186 Hz are obtained by designed IRC and RS-IRC for the third-order nanopositioning stage, and the root-mean-square (RMS) errors of 40 Hz triangular tracking are 49 nm and 13 nm under IRC and RS-IRC control, respectively.

Design of Remote Fire Automatic Alarm System Based on Zigbee Technology and TC35i Module

Ling-jie Kong 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.11

In order to realizing double function of monitoring home interior fire danger and automatic SMS alarm by using Zigbee networking technology, we propose the remote fire automatic alarm system based on Zigbee chip CC2530F256 and GSM wireless communication module TC35i. And on this basis, we give a detailed description of components selection, hardware design and software design of the system. The system testing results demonstrate that this system has good stability and response precision, anti-interference ability, which easy to be extended and applied.

Damping Controller Design for Nanopositioners: A Hybrid Reference Model Matching and Virtual Reference Feedback Tuning Approach

Jie Ling,Zhao Feng,Min Ming,Xiaohui Xiao 한국정밀공학회 2018 International Journal of Precision Engineering and Vol.19 No.1

Conventionally, fixed-structure feedback controllers are designed by model-based approaches. However, such controllers are not necessarily ideal and optimal when connecting with the actual plant because of the existence of modeling uncertainty. In this paper, a paralleled damping controller as well as a novel hybrid reference model matching (RMM) and virtual reference feedback tuning (VRFT) approach for parameters’ tuning of the controller is presented. The composite damping controller for piezo-actuated nanopositioners is fixed-structure and low-order that uses a high-gain notch filter and a high-pass resonant controller to damp the first resonant peak. The proposed hybrid tuning approach combines an identified system model and a set of experimental input/output data into the parameters’ optimization of the proposed composite damping controller. The proposed hybrid approach simplifies the tuning process by decreasing the number of the parameters in the initial values’ choosing stage from the whole nine to four. Besides, the application of experimental data improves rejection of model uncertainty. A set of optimal parameters in the controller is obtained using the proposed hybrid design approach. Experimental results with comparisons to built-in PID controller are presented to show the effectiveness of the composite damping controller optimized via the hybrid approach.

Neurotrophic Artemin Promotes Motility and Invasiveness of MIA PaCa-2 Pancreatic Cancer Cells

Meng, Ling-Xin,Chi, Yu-Hua,Wang, Xiang-Xu,Ding, Zhao-Jun,Fei, Li-Cong,Zhang, Hong,Mou, Ling,Cui, Wen,Xue, Ying-Jie Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.5

Objective: To analyze the capacity of neurotrophic artemin to promote the motility and invasiveness of MIA PaCa-2 pancreatic cancer cells. Methods: MIA PaCa-2 was cultured in vitro and studied using transwell chambers for motility and invasiveness on treatment with different concentrations of aArtemin or its receptor $GFR{\alpha}3$ were also determined. Expression of matrix metalloproteinase-2 (MMP-2) and epithelial cadherin (E-cadherin) was quantified using RT-PCR and Western blotting. Results: MIA PaCa-2 pancreatic cancer cell motility and invasiveness was significantly increased with artemin and its receptor $GFR{\alpha}3$ with dose dependence (P<0.01). MMP-2 production was also significantly increased (t = 6.35, t = 7.32), while E-cadherin was significantly lowered (t = 4.27, t = 5.61) (P <0.01). Conclusion: Artemin and its receptor $GFR{\alpha}3$ can promote pancreatic cancer cell motility and invasiveness and contribute to aggressive behavior. The mechanism may be related to increased expression of MMP-2 molecule and down-regulation of E-cadherin expression.

Lactoferrin Alleviates the Progression of Atherosclerosis in ApoE−/− Mice Fed with High-Fat/Cholesterol Diet Through Cholesterol Homeostasis

Chen-Jie Ling,Qing-Qing Min,Jin-Rong Yang,Zheng Zhang,Huan-Huan Yang,Jia-Ying Xu,Li-qiang Qin 한국식품영양과학회 2019 Journal of medicinal food Vol.22 No.10

Lactoferrin (LF) is a multifunctional glycoprotein and has beneficial effects on the regulation of lipid metabolism. However, whether LF supplementation alleviates the development of atherosclerosis (AS) remains unclear. In the present study, all of 48 male Apolipoprotein E−/− mice were fed with high-fat diet with 1.25% added cholesterol and divided to four treatment groups with either distilled water (HFCD), LF solutions at 2 mg/mL (low LF), 10 mg/mL (middle LF or MLF), or 20 mg/mL (high LF or HLF) for 12 weeks. Oral glucose tolerance tests (OGTT) were performed at weeks 0, 4, 8, and 12. At the end of the experiment, lipids in serum, liver, and feces were determined. The livers, whole aortas, and aortic sinuses were pathologically examined. The protein expression of factors related to cholesterol synthesis, absorption, and excretion were detected through western blot. No significant difference in body weight, food intake, and OGTT was observed among the four groups. Compared with the HFCD group, the MLF and HLF groups had significantly decreased serum and hepatic cholesterol levels and significantly increased fecal cholesterol contents. LF alleviated the hepatic steatosis and lipid droplet, especially in the MLF group. LF also significantly decreased the average lesion areas in the whole aorta, especially in the MLF group. On the other hand, LF downregulated hepatic protein expression of HMG-CoA reductase (the rate-limiting enzyme in cholesterol synthesis) and upregulated cholesterol 7-alpha hydroxylase (the rate-limiting enzyme in bile acid synthesis from cholesterol). LF also downregulated the intestinal expression of Niemann-Pick C1-like 1 protein, which is known to bind to a critical mediator of cholesterol absorption. In conclusion, LF supplementation alleviates the AS in mice on HFCD likely by reducing the synthesis and absorption of cholesterol and increasing cholesterol excretion.

An Optimal Random Carrier Pulse Width Modulation Technique Based on a Genetic Algorithm

Xu, Jie,Nie, Zi-Ling,Zhu, Jun-Jie The Korean Institute of Power Electronics 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.2

Since the carrier sequence is not reproducible in a period of the random carrier pulse width modulation (RCPWM) and a higher harmonic spectrum amplitude is likely to affect the quality of the power supply. In addition, electromagnetic interference (EMI) and mechanical vibration will appear. To solve these problems, this paper has proposed an optimal RCPWM based on a genetic algorithm (GA). In the optimal modulation, the range of the random carrier frequency is taken as a constraint and the reciprocal of the maximum harmonic spectrum amplitude is used as a fitness function to decrease the EMI and mechanical vibration caused by the harmonics concentrated at the carrier frequency and its multiples. Since the problems of the hardware make it difficult to use in practical engineering, this paper has presented a hardware system. Simulations and experiments show that the RCPWM is effective. Studies show that the harmonic spectrum is distributed more uniformly in the frequency domain and that there is no obvious peak in the wave spectra. The proposed method is of great value to research on RCPWM and integrated power systems (IPS).

인공신경망 모형을 이용한 투자신호 추정 및 분석: 중국 SSE50 지수를 중심으로

임걸 ( Ling Jie ),박성용 ( Sung Y. Park ) 한국재무관리학회 2020 財務管理硏究 Vol.37 No.1

본 연구에서는 인공신경망 모형을 사용한 투자신호 분석방법을 제안하고 이를 기반으로 하는 투자 전략을 제안하고자 한다. 주가 변화에 따른 투자신호 분석을 위하여 2006년 6월 1일부터 2019년 1월 4일까지의 일별 중국 상하이주가지수와 바이두지수 자료를 사용하였다. 또한 이동평균수렴확산(Moving Average Convergence and Divergence)지표를 사용하여 주식시장의 강세 시장과 약세 시장에 따라 투자전략을 차별화하였으며, 투자 기회를 판단할 수 있는 신호를 가장 낮은 0번부터 5번까지 여섯개 신호로 구분하여 보다 세분화된 투자전략 모형을 제안하였다. 또한 인터넷 검색지수 빅 데이터를 인공신경망 모형의 독립변수로 사용하여 추정한 결과 실제 신호와 유사한 신호를 예측할 수 있다는 것을 확인하였다. 2019년 1월 4일부터 3월 24일까지의 기간을 네 구간으로 나누어 투자신호를 예측한 결과 세분화된 신호에 따른 투자전략은 기존의 투자전략보다 미래의 투자 기회를 더 잘 예측할 수 있으며, 무의미한 거래를 감소시키는 효과가 있다는 것을 확인하였다. This research demonstrates the development of an investment strategy model based on investment signal analysis using artificial neural networks. In order to analyze the investment signal analysis based on the stock price change, the China Shanghai Stock Exchange Index and the Baidu Index of the daily unit from June 1, 2006 to January 11, 2019 were used. Based on the MACD index, we will take both the short market and long market effects into consideration, and put forward a differentiated investment strategy model which can classify the investment opportunities from the lowest signal level 0 to the highest signal level 5. Meanwhile, it is for sure that the predicted results of the model are similar to the actual results as we use the big data of Internet search index as the independent variable of artificial neural network. In the process of predicting the model, the period from January 4 to March 24, 2019 is divided into four time intervals for prediction. And according to the result, the investment strategy prediction based on different levels of signals can predict the future investment opportunities better than the previous investment strategy model, and certainly reduce the meaningless transactions as well.