Status, Trend and Strategy on Municipal Wastewater Management in China

Wang Baozhen,Wang Lin,Liu Shuo,Wang Li,Wang Zheng 대전대학교 환경문제연구소 2007 환경문제연구소 논문집 Vol.11 No.-

Status, Trend and Strategy on Municipal Wastewater Management in China

Wang Baozhen,Wang Lin,Liu Shuo,Wang Li,Wang Zheng 대전대학교 환경문제연구소 2007 환경문제연구소 논문집 Vol.11 No.-

Nature-based Tourism in Small Islands Adjacent to Jakarta City, Indonesia:A case study from Seribu Islands

Wang Baozhen,Wang Lin,Liu Shuo,Wang Li,Wang Zheng 한국습지학회 2007 한국습지학회지 Vol.9 No.1

Status, Trend and Strategy on Municipal Wastewater Management in China

Wang Baozhen,Wang Lin,Liu Shuo,Wang Li,Wang Zheng 한국습지학회 2007 한국습지학회지 Vol.9 No.1

The rapid development of economy in China at the expense of consuming huge amount of energy and resources, water resource in particular, which has resulted in the production and discharge of increasing amount of wastewater to the water environment. In order to effectively control the increasing water pollution trend, the State Council has stipulated that all the cities with population over 500,000 should reach wastewater treatment rate of 60% by 2005, and all the cities should reach the rate of 60% by 2010, of which Capital Beijing and all the province capital cities and important tourism cities should reach 70% then. By the end of 2005, of the 661 cities in China, 393 have built and operated municipal wastewater treatments with a total number of 790 sets, total treatment capacity of 80.91×106 m3/d and total treatment rate of > 48%. Other 73 cities have started the construction of municipal wastewater treatment plants, and other 168 cities have started to prepare, planning and design of wastewater treatment plants. Most of municipal wastewater treatment plants in big cities in China operate normally and perform well with good quality of effluent in terms of wastewater treatment train, but the sewage sludge treatment is usually poor with big problems. It has been found that the small scale WWTPs using activated sludge process in the towns are usually operated and maintained abnormally because of lack of fund, skilled operators and energy. It is therefore suggested that the small scale MWWTPs in small cities and towns adopt appropriate technologies, of which the most available ones are multi-stage ponds, constructed wetlands and the combination of them for further purification and reuse of treated wastewater.

Grey fuzzy PI control for packing pressure during injection molding process

Shuo Wang,Ji Ying,Zichen Chen,Kan Cai 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.4

This study presents a grey fuzzy PI (GFPI) controller for packing pressure control during the injection process. The novel controller was designed for solving the problems of large overshoot, static error, and long delay time on servo motor-driven injection molding machines. Based on reasonable assumptions, a mathematical model of injection system was established. According to the nonlinear, severe interferences, and long delay time characteristics in injection process, this paper integrates predictive grey system, robust fuzzy ratiocination,and PI control. Using these mathematical model and control algorithms, a GFPI controller is implemented into an MCU using C programming techniques. The integral discrete PID controller and solid fuzzy controller were realized for contrast experiments. The experimental results show that GFPI controller had better performance on reducing overshoot and static error, increasing both response rate and repeatable accuracy. Such a developed technology would provide helpful references for designing the controller of energy-saving servo motor-driven injection molding equipment.

바이올린 교육경험 유무가 아동의 정서지능에 미치는 영향 연구 -중국 태안시와 태흥시의 초등 음악교육 프로그램을 중심으로-

Wang Shuo,구승회 한국문화교육학회 2022 문화예술교육연구 Vol.17 No.6

This study aims to copy and report the effect of violin education on emotional intelligence of elementary school students, focusing on two areas, Taiheung and Taean, China. In general, there is a difference in emotional intelligence required by music education students with voltage and violin for music education, or what effect does music education that awards violin lessons have on children's emotional intelligence? The summary of the research results is as follows. Often, less abbreviations for emotional intelligence were found between the two citation sets. Taeheung City, which starts violin classes, has a higher overall average emotional intelligence than Taean City, which opened general music classes. Second, research on the emotional intelligence effect of violin lessons according to location-social conditions is selective as the intergroup function is large. In other words, it was confirmed that there were positive changes in emotional intelligence (emotional empathy, emotional recognition, emotional expression, emotional regulation) as the time included in the violin class increased. 본 연구는 중국 강쑤성의 태흥시와 산동성 태안시 두 지역을 중심으로 바이올린 교육이 초등학생의 정서지능에 미치는 영향에 관해 살펴보고자 하였다. 구체적으로는 일반적 음악교육을 받은 학생과 바이올린으로 음악교육을 받은 학생 간의 정서지능 차이가 존재하는지, 또한 바이올린 수업을 통한 음악교육이 아동들의 정서지능에 어떤 영향을 미치는지를 알아보고자 하였다. 연구를 통해 초등학생들에게 바이올린의 중요성과 그 필요성을 재인식하고, 실증연구를 바탕으로 미래 중국 지역의 음악교육 방향과 바이올린 교육과의 연계를 통한 경쟁력 강화의 연계 고리를 찾아보고자 하였다. 연구결과를 정리하면 다음과 같다. 첫째, 두 비교 집단 사이에는 정서지능의 유의미한 차이점이 발견되었다. 바이올린 수업을 개설한 태흥시는 정서지능의 전체 평균이 일반 음악수업 개설한 태안시보다 높았다. 둘째, 인구사회학적 조건에 따라 바이올린 수업의 정서지능 영향 연구는 집단간 편차가 큰 것으로 나타났다. 즉, 바이올린 수업에 투여하는 시간이 많을수록 정서지능(정서이입, 정서인식, 정서표현, 정서조절)에 긍정적 변화가 있음을 확인할 수 있었다.

Posterior Apophyseal Ring Fracture in Adult Lumbar Disc Herniation: An 8-Year Experience in Minimally Invasive Surgical Management of 48 Cases

Shuo Yuan,Qichao Wu,Lei Zang,Ning Fan,Peng Du,Aobo Wang,Tianyi Wang,Fangda Si,Jian Li,Xiaochuan Kong 대한척추신경외과학회 2022 Neurospine Vol.19 No.3

Objective: Posterior apophyseal ring fracture (PARF) is an uncommon disorder that is usually accompanied by lumbar disc herniation (LDH). The aim of this study to describe the 8-year experience of performing minimally invasive treatment of PARF, giving particular attention to surgical technique and clinical outcome. Methods: We reviewed 1,324 consecutive patients with LDH seen in our department between 2013 and 2020. Forty-eight patients (3.63%) were enrolled who were diagnosed with PARF associated with LDH and underwent transforminal endoscopic lumbar discectomy (TELD). Mean duration of the final postoperative follow-up was 5.1 years. The control group was comprised of 50 patients diagnosed with LDH without PARF at the same facility. Data on clinical outcomes were analyzed. Results: The mean operation time in the PARF group was 105.4 minutes, which was longer than the mean operation time of the control group (83.9 minutes) (p = 0.001). Surgical complications, including dural tears (6.3%) and surgical instrument rupture (4.2%) were more common in the PARF group (p = 0.025). However, there was no significant difference in the proportion of excellent and good results and recurrence rates between the LDH patients with and those without PARF, respectively. Conclusion: TELD is a safe and effective minimally invasive approach for the treatment of PARF. However, minimally invasive techniques may require longer operation time and steeper learning curve for inexperienced surgeons. The separation and removal of bone fragments, a key step in the procedure, requires patience and care to prevent rupture, residual surgical instruments, and leakage of cerebrospinal fluid.

Fabrication of Protective Textile with N-doped TiO2 Embedded Citral Microcapsule Coating and Its Air Purification Properties

Shuo Wang,Huihui Ding,Yishi Zhao,Yonggui Li,Wei Wang 한국섬유공학회 2020 Fibers and polymers Vol.21 No.2

The protective textile was successfully prepared using N-doped TiO2 (N-TiO2) embedded citral microcapsule coating. N-TiO2 loaded citral microcapsules were synthesized through interfacial polymerization. Results showed the average diameter of N-TiO2 loaded citral microcapsule with core/shell (Mcitral : MHDI) 2:1 was 1.069 μm. Its encapsulation efficiency was 75.63 %. The citral content from finished cotton fabric measured by gas chromatography was up to 2.90 mg/g (weight of essence: weight of fabric). The essence release content of citral was nearly 50 % of their aroma after 12 weeks, exhibiting good physical function for air purification. Additionally, aromatic textile coated with N-TiO2 embedded citral microcapsules also exhibited photocatalytic activity for the degradation of formaldehyde under visible light irradiation. This functionalfabric would have potential applications in the air purification filed due to the chemical and physical dual effect.

Novel YBO3 phosphors doped with Ln3+ (Ce3+, Tb3+, Eu3+) ions with tunable color for WLED applications

Shuo Kang,Zhikui Yu,Qirong Tian,Minghui Tai,Jiaoying Wang,Dalai Jin,Longcheng Wang 대한금속·재료학회 2022 ELECTRONIC MATERIALS LETTERS Vol.18 No.6

In this work, YBO3phosphors doped with Ln3+(Ce3+, Tb3+,Eu3+)ions were synthesized by a facile hydrothermal methodusing high temperature and high pressure environment. Structural property characterizations show all the samples have asimilar spherical morphology and a hexagonal crystal structure with good crystallinity. PL spectra and CIE calculation showthat the color of phosphors can be easily controlled by the species and atomic content of Ln3+ions. White color is achievedas the atomic contents of Ln3+ions are: 1% Ce3+,3% Tb3+,and 0.5% Eu3+,respectively. Furthermore, LED devices basedon ultraviolet chip were fabricated and characterized, and the results clearly demonstrated the tunable color of as-preparedphosphors. At the same time, co-doping Ce3+,Tb3+,and Eu3+ions can well adjust the fluorescence lifetime of the threerare earth ions through energy transfer. These results show that the phosphor has broad application prospects in the field ofdisplay lighting such as LED.

Development of monocular video deflectometer based on inclination sensors

Shuo Wang,Shuiqiang Zhang,Xiaodong Li,Yu Zou,Dongsheng Zhang 국제구조공학회 2019 Smart Structures and Systems, An International Jou Vol.24 No.5

The video deflectometer based on digital image correlation is a non-contacting optical measurement method which has become a useful tool for characterization of the vertical deflections of large structures. In this study, a novel imaging model has been established which considers the variations of pitch angles in the full image. The new model allows deflection measurement at a wide working distance with high accuracy. A monocular video deflectometer has been accordingly developed with an inclination sensor, which facilitates dynamic determination of the orientations and rotation of the optical axis of the camera. This layout has advantages over the video deflectometers based on theodolites with respect to convenience. Experiments have been presented to show the accuracy of the new imaging model and the performance of the monocular video deflectometer in outdoor applications. Finally, this equipment has been applied to the measurement of the vertical deflection of Yingwuzhou Yangtze River Bridge in real time at a distance of hundreds of meters. The results show good agreement with the embedded GPS outputs.