The cost of treating water purification plant water treatment residuals is high, with a low recovery rate and unstable effluent water quality, particularly in plants using lake and reservoir water sources in severe cold regions. Maximizing water resource utilization requires integrating water treatment residuals concentration and treatment effectively. Here, ceramic membrane technology was employed to separate supernatant and substrate after pretreatment. Optimal settling was achieved using 75 μm magnetic powder at 200 and 4 mg/L of nonionic polyacrylamide co-injection. Approximately 65% of the separated supernatant was processed by 0.1–0.2 μm Al2O3 ceramic membranes, yielding a membrane flux of 50 L/m2h and a water recovery rate of 99.8%. This resulted in removal rates of 99.3% for turbidity, 98.2% for color, and 87.7% for color and permanganate index (chemical oxygen demand, COD). Furthermore, 35% of the separated substrate underwent treatment with 0.1–0.2 μm mixed ceramic membranes of Al2O3 and SiC, achieving a membrane flux of 40 L/m2h and a water recovery rate of 73.8%. The removal rates for turbidity, color, and COD were 99.9%, 99.9%, and 82%, respectively. Overall, this process enables comprehensive concentration and treatment integration, achieving a water recovery rate of 90.7% with safe and stable effluent water quality.

현재 관광 산업과 문화 사업이 번성하는 대배경 하에, 유적지 기념 경 관의 가치는 국가 문화 공원 건설 과정에서 더욱 돋보여야 한다. 본 연 구는 문화 경관 이론의 관점에서, 쓰촨 원촨 대지진 유적 공원을 기념 관광 고전 지구로 삼아 연구 대상으로 하여, 유적 기념 경관에 대한 관 광객 지각의 구조 방정식 모델을 구축한다. 설문조사를 통해 관련 수칙 을 얻고 분석하였다. 연구 결과, 지각된 가치가 관광객 만족도와 긍정적 인 상관관계가 있으며, 만족도를 통해 간접적으로 충성도에 영향을 미친 다는 것을 발견했다. 지각된 품질과 전체 이미지는 지각된 가치의 중요 한 요소이며 서로 영향을 미친다. 지각된 품질은 경관, 교육, 서비스의 3 가지 차원을 포함하며, 유적지 본체 외에도, 관광객들은 경관 조각, 경관 장치, 상징적 경관, 문화 창조 제품 및 교육 체험에 대한 지각이 높아, 지각된 가치를 향상시키는 중요한 요소이다. 전체 이미지는 인지 및 감 정의 2가지 차원을 포함하며, 지각된 가치를 통해 간접적으로 충성도에 영향을 미친다. 이러한 연구 결과를 바탕으로, 사례 지역에서 관광객 지 각을 향상시키기 위한 대책 및 제안을 시도하였다.

Refined structured tin dioxide gets the amount of attraction because of its low cost and stability. The C@SnO2 nanospheres with mesoporous structures were produced using the hard template method in this work. The C@SnO2 is primarily gained attributed to the dehydration condensation of C6H12O6 and the hydrolysis of SnCl4 ·5H2O. The morphology of the C@SnO2 was analyzed by physical characterization and the diameter of the obtained C@SnO2 was around 138 nm. When C@SnO2 was applied to lithium-ion batteries as anode material, it performed outstanding electrochemical properties, with a capacity of 735 and 539 mA h g− 1 maintained at 1000 and 2000 mA g− 1, respectively. Furthermore, it exhibits favorable discharge/ charge cycle stability. This is probably because of the more chemically redox active sites provided by C@SnO2 nanocomposites and it also allows fast ion diffusion and electron migration.

The oriental fruit fly, Bactrocera dorsalis, is one of important agricultural pests that attack a wide range of fruits and vegetables. Adult female can cause direct damage by laying eggs under the skin of fruits and vegetables. The eggs hatch into larvae that feed in the decaying flesh of the agricultural crops. Damaged fruits and vegetables quickly become inedible or dropto the ground. We investigated the oviposition characteristics of B. dorsalis on twelve fruits and seven vegetables. B. dorsalis marked the oviposition places on every crop tested. B. dorsalis laid eggs into the fruits and vegetables except lemon and passionfruit. We examined the adult emergence from infested crops.

Professor Shen Wei’s new book-Decoding Chinese Bilateral Investment Treaties-has vividly depicted a vibrant China in bilateral investment treaties (BITs) and BIT arbitrations. The observations, analyses and findings in his book are supported with abundant empirical evidence and critical theoretical explorations. The ground-breaking contribution made by this book lies in demystifying the patterns inherent in China’s BIT law and practice and adopting versatile methodology to address the literature gap identified by the author. This book not only explores the symbiotic relationship between China’s domestic governance and global BIT networks, but also coherently addresses four inter-connected puzzles relating to Chinese BITs. Professor Shen’s study shows that China and its investors will be proactive rule-makers and active rule-users in the arena of international investment law and investorstate arbitration. This new book will surely be an invaluable inspiration for practitioners, scholars and other persons who have interest in this field.

MicroRNAs (miRNAs) are endogenous non-coding genes that participate in post-transcription regulation by either degrading mRNA or blocking its translation. It is considered to be very important in regulating insect development and metamorphosis. Insects are the largest group of animals and are extremely valuable in biological and agriculture research. Insects are also important pests to human health and agriculture, and efforts are necessary protect both humans and plants from disease and damage. Despite their importance, insects lag behind mammals, nematodes, and plants in miRNA research. At present, only 279 insect miRNAs have been identified from Drosophila melanogaster, Anopheles gambiae, Apis mellifera, Bombyx mori, and D. pseudoobscura in miRBase, and most of these miRNAs were computationally predicted without experimental validation. Functional analysis of insect miRNAs has only been conducted in D. melanogaster.

A survey of staff members of higher education institutions across China at which educational technology training programs had been conducted indicated that the great majority of respondents were using educational technology in their work, although a smaller proportion felt that they had the necessary knowledge and skills to do so efficiently and effectively. The most common skills mastered were basic computer operations, Web searching, and the use of presentation software. Skills that are more integrally related to effective student learning and cost-efficient operation, such as course management and evaluation and integration of technology with lessons, were mastered only by a small minority. Respondents recommended that future training take the form of blended learning, combining face-to-face format with distance learning and self-study, and that it emphasize practical skills and direct application to the participant’s work. Other recommendations are also made regarding the establishment of standards for educational technology competencies and the improvement of evaluation of training courses.

엽장, 엽폭, 엽의 크기와 엽형지수 등 소엽(leaflet) 형질의 변이와 8개 농업형질과의 관계를 구명하기 위하여 1992년도 대만에서 가을에 재배된 콩 유전자원 884 품종의 특성조사 자료를 분석하였던 바 주요 결과를 요약하면 다음과 같다. 1. 콩 유전자원들의 소엽 형질들의 변이를 보면 엽장은 4.3~14.7cm, 엽폭은 2.8~9.7cm에 분포하였으며, 엽의 크기(엽장 엽폭)는 12.1~124.6cm2 였다. 2. 엽장, 엽폭과 엽의 크기의 절대적 변이는 단일에 따른 영양생장량의 제한 때문에 크지 않았다. 또한 국제식물유전자원위원회(IBPGR)의 기준에 따른 분류시 엽의 크기가 대에 속하는 것은 없었다. 3. 엽형지수는 1.21~3.06의 변이를 보였으며 3품종은 피침형에 속하였고 나머지는 모두 난형 또는 중간형에 속하였다. 4. 엽장, 엽폭, 엽의 크기, 엽형지수의 범위와 평균은 온대품종군과 열대품종군간과 품종군내에서 차이가 있었다. 5. 엽장, 엽폭, 엽의 크기와 엽형지수는 100립중을 제외한 7개 형질과 고도로 유의한 정상관을 보였고 100립중과는 엽장, 엽의 크기 및 엽형지수와 고도로 유의한 부상관을 보였다. 6. 소엽 형질들의 농업형질과의 상관관계를 보면 소엽 형질간에 변이가 컸으며 엽장, 엽폭과 엽의 크기는 개화일수, R1 기 와 R8 기의 경장, 개체당협수와 밀접한 관계가 있었고 엽형지수는 다른 형질보다 100립중과 밀접한 관계가 있었다.