Biological Removal of H2S from the Livestock Manure Using a Biofilter

Mei Sheng Liang,Ying Liang 한국생물공학회 2013 Biotechnology and Bioprocess Engineering Vol.18 No.5

In this paper, the biological removal of H2S from air had been investigated using a self-made biofilter with efficient bioceramics and a polyhedral hollow ball. The biological removal efficiency of H2S had been analyzed at different experimental conditions, such as inlet H2S concentration, residence time, initial pH value, and reaction temperature etc. The results showed that the initial pH value had a slight effect on H2S removal efficiency from pH 3 to 9. The optimal initial pH value was 5.5, while the H2S removal efficiency was 100%. The H2S removal efficiency increased with increases in the nutrient solution spraying rate. The appropriate temperature was 25oC in the temperature range from 15 to 30oC. The H2S removal efficiency dropped with the increase of air input and inlet H2S concentration. After being isolated and screened, six strains of heterotrophic sulfide oxidizing bacteria and one strain autotrophic sulfide oxidizing bacteria were determined to be involved in the removal of H2S within the biofilter. The reaction kinetics of H2S was in accordance with first order reaction kinetics.

Introducer Curving Technique for the Prevention of Tilting of Transfemoral Günther Tulip Inferior Vena Cava Filter

Liang Xiao,De-sheng Huang,Jing Shen,Jia-jie Tong 대한영상의학회 2012 Korean Journal of Radiology Vol.13 No.4

Objective: To determine whether the introducer curving technique is useful in decreasing the degree of tilting of transfemoral Tulip filters. Materials and Methods: The study sample group consisted of 108 patients with deep vein thrombosis who were enrolled and planned to undergo thrombolysis, and who accepted transfemoral Tulip filter insertion procedure. The patients were randomly divided into Group C and Group T. The introducer curving technique was Adopted in Group T. The post-implantation filter tilting angle (ACF) was measured in an anteroposterior projection. The retrieval hook adhering to the vascular wall was measured via tangential cavogram during retrieval. Results: The overall average ACF was 5.8 ± 4.14 degrees. In Group C, the average ACF was 7.1 ± 4.52 degrees. In Group T, the average ACF was 4.4 ± 3.20 degrees. The groups displayed a statistically significant difference (t = 3.573, p = 0.001) in ACF. Additionally, the difference of ACF between the left and right approaches turned out to be statistically significant (7.1 ± 4.59 vs. 5.1 ± 3.82, t = 2.301, p = 0.023). The proportion of severe tilt (ACF ≥ 10º) in Group T was significantly lower than that in Group C (9.3% vs. 24.1%, χ2 = 4.267, p = 0.039). Between the groups, the difference in the rate of the retrieval hook adhering to the vascular wall was also statistically significant (2.9% vs. 24.2%, χ2 = 5.030, p = 0.025). Conclusion: The introducer curving technique appears to minimize the incidence and extent of transfemoral Tulip filter tilting. Objective: To determine whether the introducer curving technique is useful in decreasing the degree of tilting of transfemoral Tulip filters. Materials and Methods: The study sample group consisted of 108 patients with deep vein thrombosis who were enrolled and planned to undergo thrombolysis, and who accepted transfemoral Tulip filter insertion procedure. The patients were randomly divided into Group C and Group T. The introducer curving technique was Adopted in Group T. The post-implantation filter tilting angle (ACF) was measured in an anteroposterior projection. The retrieval hook adhering to the vascular wall was measured via tangential cavogram during retrieval. Results: The overall average ACF was 5.8 ± 4.14 degrees. In Group C, the average ACF was 7.1 ± 4.52 degrees. In Group T, the average ACF was 4.4 ± 3.20 degrees. The groups displayed a statistically significant difference (t = 3.573, p = 0.001) in ACF. Additionally, the difference of ACF between the left and right approaches turned out to be statistically significant (7.1 ± 4.59 vs. 5.1 ± 3.82, t = 2.301, p = 0.023). The proportion of severe tilt (ACF ≥ 10º) in Group T was significantly lower than that in Group C (9.3% vs. 24.1%, χ2 = 4.267, p = 0.039). Between the groups, the difference in the rate of the retrieval hook adhering to the vascular wall was also statistically significant (2.9% vs. 24.2%, χ2 = 5.030, p = 0.025). Conclusion: The introducer curving technique appears to minimize the incidence and extent of transfemoral Tulip filter tilting.

A LSTM-based method for intelligent prediction on mechanical response of precast nodular piles

Sheng-Liang Lu,Xiao-Xiao Chen,Chang-Sheng Zhan 국제구조공학회 2022 Smart Structures and Systems, An International Jou Vol.30 No.2

The determination for bearing capacity of precast nodular piles is conventionally time-consuming and high-cost by using numerous experiments and empirical methods. This study proposes an intelligent method to evaluate the bearing capacity and shaft resistance of the nodular piles with high efficiency based on long short-term memory (LSTM) approach. A series of field tests are first designed to measure the axial force, shaft resistance and displacement of the combined nodular piles under different loadings, in comparison with the single pre-stressed high-strength concrete piles. The test results confirm that the combined nodular piles could provide larger ultimate bearing capacity (more than 100%) than the single pre-stressed highstrength concrete piles. Both the LSTM-based method and empirical methods are used to calculate the shift resistance of the combined nodular piles. The results show that the LSTM-based method has a high-precision estimation on shaft resistance, not only for the ultimate load but also for the working load.

The Research of Data Mining Classification Algorithm that Based on SJEP

Liang Zhao,Deng-Feng Chen,Sheng-Jun Xu,Jun Lu 보안공학연구지원센터 2015 International Journal of Database Theory and Appli Vol.8 No.2

Solvothermal Synthesis of Bi2O2CO3 Nanoplates for Efficient Photodegradation of RhB and Phenol under Simulated Solar Light Irradiation

Sheng-Peng Hu,Cheng-Yan Xu,Bao-You Zhang,Yi Pei,Liang Zhen 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.10

Monodispersed Bi2O2CO3 nanoplates with an average width of 320 nm and thicknesses of 50–90 nm were successfully synthesized by a simple solvothermal method in a mixture solution of polyethylene glycol and H2O. The obtained nanoplates were characterized by means of XRD, FT-IR, SEM and TEM. The effect of surfactant sodium dodecyl benzene sulfonate on the morphology of Bi2O2CO3 product was investigated. Under simulated solar light irradiation, Bi2O2CO3 nanoplates exhibited superior photocatalytic activities towards the degradation of RhB as well as high chemical stability upon cycling photocatalytic test. The nanoplates also showed promising photodegradation ability for eliminating refractory pollutant of phenol. The excellent photocatalytic performance of Bi2O2CO3 nanoplates as compared with P25-TiO2 endows them as promising high efficiency photocatalysts.

A Novel Adaptive High-order Sliding Mode Control based on Integral Sliding Mode

Liang Wang,Yongzhi Sheng,Xiangdong Liu 제어·로봇·시스템학회 2014 International Journal of Control, Automation, and Vol.12 No.3

This paper presents an adaptive high-order sliding mode control scheme targeting for uncertain minimum phase nonlinear single-input-single-output (SISO) systems, which can be equivalently formulated as the finite-time stabilization of high-order input-output dynamics subject to the uncertainties of parameters such as a chain of integrators. The proposed controller is derived from the concept of integral sliding mode and consists of two parts, one part of which achieves the finite-time stabilization of the high-order input-output dynamics without uncertainties by solving a finite-horizon optimal control problem with a free-final-state. The other part adopts the adaptive sliding mode control technique considering the practical bounded uncertainties, by which a modified switching gain adaptation algorithm is developed so that the on-line switching gain selection can be executed and the upper bounds of the uncertainties are not requisite in advance. As a result, a high-order sliding mode is established, ensuring the sliding variables and its high-order derivatives converge to an arbitrarily small vicinity of the origin in finite time. Therefore, the proposed controller achieves fixed convergence time and further improves strong robustness against bounded uncertainties with lower chattering and the easy implementation. Simulation results are presented in detail to verify the effectiveness and feasibility of the proposed algorithm.

Design of a Bidirectional DC/AC Converter with Battery Charging/Discharging/Standing Balance Control

Liang-Rui Chen,Bo-Rui Xu,Chuan-Sheng Liu,Shao-wei Peng,Chia-Hsuan Wu 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5

Battery cells connected in series have been widely used in high-voltage and high-power applications. In this paper, a single-phase battery energy storage system with battery balance charging, battery balance discharging, and power factor correction capabilities was developed. A prototype suitable for a single-phase 110V power supply was designed and implemented for verification. To verify its performance, three 48V/7Ah battery modules were used as normal batteries, and a 48V/5Ah battery module was used as a retired battery. The experimental results showed that the battery energy storage system has excellent battery balancing capability. Compared with that of the conventional system without balanced control, the balancing performance of the proposed system is increased by about 15.25% and 26.92%, respectively, when the system was operated in the converter and rectifier modes. In addition, the proposed system also had battery fault tolerance, and was compatible with recycled batteries and an independent power supply.

Adaptive Synchronization of Leader-Follower Networked Systems against Communication Attenuation and Actuators Faults

Liang Dong,Jian-Hui Wang,Shu-Sheng Gu,Yuan-Bo Shi,Fang-Mei Zhao 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.6

This paper addresses the adaptive asymptotic synchronization problem of a class of leader-follower largescale networked systems against communicated signal attenuation and actuator bias faults. Adaptive mechanismsare constructed to estimate each unknown faulty factor of communications and actuators on-line. Based on theestimations, an adaptive compensation controller is designed to automatically remove the unexpected impacts ofcommunication and actuator faults. Through the adaptive adjustment parameters and Lyapunov functions, theachievement of asymptotic synchronization of the leader-follower large-scale networked system with the improperactuator and faulty transmitted signals is obtained. Finally, the synchronization results are validated by a multiplevehicle large-scale device.

Integration of Design of Experiments into Quality Function Deployment

Sheng, Jing,He, Zhen,Shi, Liang Xing 한국품질경영학회 2002 The Asian Journal on Quality Vol.3 No.1

Quality Function Deployment (QFD) is a useful planing process in new product development. It achieves the maximum custom satisfaction through translating Voice of the Customer (VOC) into voice of the engineer in the House of Quality (HOQ), and ensures the customer focus from house to house translation. In QFD, the relationship matrix and correlation matrix are important parts, which will influence the final priorities of the technical response. According to the traditional methods, these matrices are determined by the people's experience and filled with ordinal numbers. It would inevitably result in inaccuracy and curtness. Design of Experiments (DOE) is employed to determine the effect of variables on the process. In this paper, the author puts forward the idea of integrating DOE into the process of QFD. This integration helps to produce scientific decision and robust product design. A framework on QFD/DOE is presented and explanations are also made.

Starving Aphelinus asychis negatively affects host feeding and parasitism on Myzus persicae

Sheng-Yin Wang,Yi Feng,Ning-Ning Liang,Rui Tang,Yan-Hong Liu,Da Yu Zhang,Tong-Xian Liu 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.2

Aphelinus asychis (Walker) is an effective biological control agent for many species of aphids found on various crops. To provide strategies for releasing these parasitoids into a crop ecosystem, the effects of a short-duration starvation experiment on A. asychis were measured under laboratory conditions using Myzus persicae (Sulzer) as the host on cabbage and chili pepper plants. The survival rate of starved A. asychis female adults decreased sharply as the starving time increased, and the longevity of the starved parasitoids also decreased significantly. The number of aphids killed by the parasitoids decreased gradually with the extended duration of starvation. In addition, the number of aphids on chili peppers and cabbages killed by starved A. asychis females over their lifespan was significantly lower than that in the control group. Our results indicated that a short period of starvation might not cause significantly negative effects on the parasitoids and may be beneficial for the control of M. persicae at low densities after 1 day; however, starvation for>1 day seriously affected the performance of A. asychis females over their entire lifespan. The parasitoids performed similarly when aphids were fed chili pepper or cabbage plants.