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Anaerobic Digestion of Cassava Pulp with Sewage Sludge Inocula

Jun Zhang, Jun-Yang Xu, Dun-Qiu Wang, Nan-Qi Ren
2015 BioResources  
The effectiveness of sludge inocula from a municipal carrousel oxidation ditch wastewater treatment plant was studied for both batch and semicontinuous anaerobic digestion (AD) of cassava pulp. In 1.25-L batch experiments, the following sludge inocula were used: I1 sludge from the hydrolysis acidification tank pre-acclimated with cassava pulp; I2, predigested sludge from the hydrolysis acidification tank; and I3, predigested sludge from the gravity thickening tank. In 1.0-L semicontinuous
more » ... mesophilic AD of cassava pulp inoculated with I3 was carried out at organic matter loading rates (OLRs) of 1.5 to 12.5 kg volatile solids (VS)/(m 3 d), whereas 1.5 to 18.0 kgVS/(m 3 d) was used for thermophilic AD. For batch operations, all sludge types could be used as the inoculum for the mesophilic AD of cassava pulp, whereas only I1 was used for thermophilic AD. The maximum specific methane yields were 0.333 and 0.395 m 3 /kgVSadded, respectively, for mesophilic and thermophilic batch digestion with I1. During semi-continuous AD of cassava pulp inoculated with I3, high specific methane yields of 0.334 to 0.336 m 3 /kgVSadded were obtained under both mesophilic and thermophilic conditions. For thermophilic AD of cassava pulp with sludge inocula, the range of optimum OLR was 2.5 to 15.0 kgVS/(m 3 d), and that was 2.5 to 8.7 kgVS/(m 3 d) for mesophilic AD.
doi:10.15376/biores.11.1.451-465 fatcat:ft7z33dqq5badnl26wc7p6hg2q

Performance Evaluation of a Distributed File System with Locality-Aware Metadata Lookups

Nan Dun, Kenjiro Taura, Akinori Yonezawa
2011 IPSJ Online Transactions  
GMount is a high-performance distributed file system with locality-aware metadata lookups and small installation effort. GMount organizes computer nodes in a decentralized hierarchical overlay to unify separate local file systems into a global shared namespace and achieve locality-aware metadata lookups. GMount offers not only better performance when application executes with considerable data access locality, but also the ability to effortlessly and rapidly enable data sharing among clusters,
more » ... louds, and supercomputers. This paper presents performance evaluation of the latest GMount implementation by using both micro-benchmark and real-world data-intensive applications. Experimental results demonstrate that GMount has highly scalable metadata and I/O operation performance when data access locality is common, and the performance of GMount is practically useful for routine data-intensive computing practice.
doi:10.2197/ipsjtrans.4.228 fatcat:udumcmvrjjg47plzbewghh7uiy

Research of Security Constrained Dispatching for Monthly Generation Plan

Rui Ge, Hai-chao Wang, Dun-nan Liu
2013 Energy and Power Engineering  
The dispatching for monthly generation plan is to manage the congestion considering the security constrains of the power grid, where the monthly generation plan is the result of vary monthly power exchange, including long-term power contract, power exchange among provinces and generation constitution exchanges. The application of monthly security constrained dispatching is with significant meaning for the security and stability of power grid. This paper brings forward the purpose and contents
more » ... security dispatching and introduces the working procedure and mathematic models. At last, the practical example of the Anhui Province power grid is introduced to explain the models. Figure 1. The big user buys the electricity transaction condition straight.
doi:10.4236/epe.2013.54b118 fatcat:r2aoiwngz5ghpjf52wvol5n6su

A PSO-based multi-objective multi-label feature selection method in classification

Yong Zhang, Dun-wei Gong, Xiao-yan Sun, Yi-nan Guo
2017 Scientific Reports  
Feature selection is an important data preprocessing technique in multi-label classification. Although a large number of studies have been proposed to tackle feature selection problem, there are a few cases for multi-label data. This paper studies a multi-label feature selection algorithm using an improved multi-objective particle swarm optimization (PSO), with the purpose of searching for a Pareto set of non-dominated solutions (feature subsets). Two new operators are employed to improve the
more » ... rformance of the proposed PSO-based algorithm. One operator is adaptive uniform mutation with action range varying over time, which is used to extend the exploration capability of the swarm; another is a local learning strategy, which is designed to exploit the areas with sparse solutions in the search space. Moreover, the idea of the archive, and the crowding distance are applied to PSO for finding the Pareto set. Finally, experiments verify that the proposed algorithm is a useful approach of feature selection for multi-label classification problem. Published: xx xx xxxx OPEN 2 Scientific RepoRts | 7: 376 |
doi:10.1038/s41598-017-00416-0 pmid:28336938 pmcid:PMC5428503 fatcat:thzqcymvsfgy3hkhau7frfmd74

The Design of Electricity Selling System Based on Energy Internet

Dun-nan LIU, Ya-ru MENG
2017 DEStech Transactions on Engineering and Technology Research  
The concept of Energy Internet was brought up against the efficiency problem of energy allocation and the continuous development of distributed renewable energy. Along with the liberalization of electricity selling market, the electricity sales company will pay more attention to the whole process of user's energy service to get more benefits. In this paper, the changes of future electricity selling market was analyzed based on the characteristics of Energy Internet. The electricity selling
more » ... m was designed based on the optimized business of electricity sales company, and the basic functions and expanding functions of system were further introduced, which provided a new possibility for the development of electricity sales company.
doi:10.12783/dtetr/tmcm2017/12653 fatcat:ep6u4gvftrhjlir5xccigp3mye

GMount: Build your grid file system on the fly

Nan Dun, Kenjiro Taura, Akinori Yonezawa
2008 2008 9th IEEE/ACM International Conference on Grid Computing  
doi:10.1109/grid.2008.4662817 dblp:conf/grid/DunTY08 fatcat:kdnljuxmczgjjc3ey5bx76unla

Easy and instantaneous processing for data-intensive workflows

Nan Dun, Kenjiro Taura, Akinori Yonezawa
2010 2010 3rd Workshop on Many-Task Computing on Grids and Supercomputers  
doi:10.1109/mtags.2010.5699428 dblp:conf/sc/DunTY10 fatcat:crfcsccutnalhhuzkoonv434fa

Research on the Operation Strategy of Power Sales Company for Energy Internet

Dun-nan LIU, Ming-guang LIU
2017 DEStech Transactions on Engineering and Technology Research  
China's energy Internet theory and the construction of the physical layer is being perfected. The new round of electric power system reform provides an opportunity for development of the energy Internet. There will be a far-reaching impact on electricity production, sales, use and other links. In the new electricity reform, the sale of electricity market liberalization makes the main body of the electricity market more diverse. As a newly emerging market player, the sale of electricity
more » ... need to find a reasonable business strategy in the fierce market competition. From the perspective of energy Internet, the paper studies the influence of energy Internet on power market, and puts forward some suggestions for the operation strategy of the power sales company which can supple the electricity.
doi:10.12783/dtetr/tmcm2017/12654 fatcat:zmducn5m25hw7iay6emsujaquq

Calculation Model of Priority Generation Considered of Low-carbon Energy Saving

Hua Zhong, Zhi Wei Ying, Chun Yi Chen, Dun Nan Liu, Wei Hua Weng
2018 IOP Conference Series: Earth and Environment  
Based on the idea of low-carbon energy saving, this paper uses the differential power accounting method based on the minimum operation mode to calculate the priority power generation. Aiming at the coal consumption and environmental protection efficiency of coalfired units, a model and evaluation index system are constructed. The coal consumption and environmental protection efficiency are converted into quantifiable economic benefits, which provides the evaluation criteria for selecting the
more » ... ority generation method of coal -fired units. This paper accounts for Shanghai priority generation of coal -fired units.
doi:10.1088/1755-1315/153/3/032036 fatcat:ebsy4hmnvjhafmbktvczydjcsa

Conversion of yellow wine lees into high-protein yeast culture by solid-state fermentation

Yuanliang Hu, Lina Pan, Yaohao Dun, Nan Peng, Yunxiang Liang, Shumiao Zhao
2014 Biotechnology & Biotechnological Equipment  
initial yellow wine lees 30 g) were supplemented with 45 mL of water, 180 mg of SUKAPro NE neutralprotease (50 U/mg; Sukahan, Weifang, China) and 12 mg of lyticase (400 U/mg; Pangbo Biotechnology Company, Nanning  ... 
doi:10.1080/13102818.2014.962407 pmid:26019568 pmcid:PMC4433825 fatcat:v25nmftl3fekplpowbsboamq6a

Associations between abnormal vitamin D metabolism pathway function and non‑small cell lung cancer

Nan Ge, Xiu‑Mei Chu, Yun‑Peng Xuan, Dun‑Qiang Ren, Yongjie Wang, Kai Ma, Hui‑Jiang Gao, Wen‑Jie Jiao
2017 Oncology Letters  
Lung cancer is a type of malignant tumor derived from the respiratory system, which is the leading cause of cancer-associated mortality worldwide, of which ~80% of cases are attributable to non-small cell lung cancer (NSCLC). A previous study demonstrated that 1α,25-Dihydroxyvitamin D 3 (1α,25(OH) 2 D 3 ), derived from the vitamin D metabolic pathway contributes an antitumor effect.
doi:10.3892/ol.2017.7162 pmid:29250167 pmcid:PMC5727627 fatcat:fhymtwt3lvezra4jdpmefozoyq

Brain-based Correlations Between Psychological Factors and Functional Dyspepsia

Jiaofen Nan, Jixin Liu, Junya Mu, Wanghuan Dun, Ming Zhang, Qiyong Gong, Wei Qin, Jie Tian, Fanrong Liang, Fang Zeng
2015 Journal of Neurogastroenterology and Motility  
Background/Aims Increasing evidence shows involvement of psychological disorders in functional dyspepsia (FD), but how psychological factors exert their influences upon FD remains largely unclear. The purpose of the present study was to explore the brain-based correlations of psychological factors and FD. Methods Based on Fluorine-18-deoxyglucose positron emission tomography-computed tomography, the altered cerebral glycometabolism was investigated in 40 FD patients compared with 20 healthy
more » ... rols during resting state using statistical parametric mapping software. Results FD patients exhibited increased glucose metabolism in multiple regions relative to controls (P < 0.001, family-wise error corrected). After controlling for the dyspeptic symptoms, increased aberrations persisted within the insula, anterior cingulate cortex (ACC), middle cingulate cortex (MCC) and middle frontal cortex (midFC), which was related to anxiety and depression score. Interestingly, FD patients without anxiety/depression symptoms also showed increased glycometabolism within the insula, ACC, MCC and midFC. Moreover, FD patients with anxiety/depression symptoms exhibited more significant hypermetabolism within the above 4 sites compared with patients without anxiety/depression symptoms.
doi:10.5056/jnm14096 pmid:25540947 pmcid:PMC4288085 fatcat:pwqby7fktvcqbht7wdlbrbupqi

Psoas hematoma as a rare complication of posterior lumbar interbody fusion: a case report

Bo Deng, Hai Nan Hong, Xin Bing Feng, Zheng Hua Hong, Guo Ping Cai, Dun Hong
2020 BMC Surgery  
Background Psoas hematoma rarely occurs in patients with spondylolisthesis who undergo posterior lumbar interbody fusion (PLIF) surgery. Case presentation Here we reported a case of a 57-year-old male patient diagnosed with spondylolisthesis who underwent PLIF at the local hospital. Seven days post-surgery, abdominal pain occurred, and the pain in the right lower limb gradually increased. The computerized tomography (CT) indicated a formation of hematoma around the psoas muscle.
more » ... ion angiography (DSA) suggested a vascular injury, a rupture of the right segmental artery of the lumbar vertebral level 4. The patient then received DSA vascular embolization, after which the lower lumbar segmental artery active bleeding was stopped. One month after discharge, the abdominal hematoma was gradually absorbed, and the pain in the waist, leg, and abdomen disappeared. Conclusion Symptoms such as abdominal pain, abdominal distension, and exacerbation of lower limb pain, may suggest the occurrence of psoas hematoma after PLIF. DSA vascular embolization is suggested as the first treatment approach for this type of complication.
doi:10.1186/s12893-020-00942-1 pmid:33176755 fatcat:sjd2asgywnbrvahjuq7cv7ypfm

Purification and Identification of Antioxidant Peptides from Enzymatic Hydrolysate of Spirulina platensis

Jie Yu, Yuanliang Hu, Mingxiong Xue, Yaohao Dun, Shenao Li, Nan Peng, Yunxiang Liang, Shumao Zhao
2016 Journal of Microbiology and Biotechnology  
The aim of this study was to isolate antioxidant peptides from an enzymatic hydrolysate of Spirulina platensis. A novel antioxidant peptide was obtained by ultrafiltration, gel filtration chromatography, and reverse-phase high-performance liquid chromatography, with the 1,1diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay used to measure the antioxidant activity, and the sequence was determined to be Pro-Asn-Asn (343.15 Da) by electrospray ionization tandem mass spectrometry. This
more » ... e was synthesized to confirm its antioxidant properties, and it exhibited 81.44 ± 0.43% DPPH scavenging activity at 100 µg/ml, which was similar to that of glutathione (82.63 ± 0.56%). Furthermore, the superoxide anion and hydroxyl free-radical scavenging activities and the SOD activity of the peptide were 47.84 ± 0.49%, 54.01 ± 0.82%, and 12.55 ± 0.75%, respectively, at 10 mg/ml. These results indicate that S. platensis is a good source of antioxidant peptides, and that its hydrolysate may have important applications in the pharmaceutical and food industries.
doi:10.4014/jmb.1601.01033 pmid:27090190 fatcat:nz7xiiafbfhnjoylj7biljvvgu

Evaluation on Nutritional Value of Field Crickets as a Poultry Feedstuff

Dun Wang, Shao Wei Zhai, Chuan Xi Zhang, Yao Yu Bai, Shi Heng An, Ying Nan Xu
2005 Asian-Australasian Journal of Animal Sciences  
The proximate analysis, amino acid content and true amino acid digestibility and TMEn for poultry of adult Field crickets Gryllus testaceus Walker, were investigated. The insect was also used as partial replacement of protein supplements in the broiler diet on an equal CP percentage and TMEn basis. The results indicated that the adult insect contained: crude protein 58.3%; fat 10.3%, chitin 8.7% and ash 2.96% on dry matter basis, respectively. The total amounts of methionine, cystine and lysine
more » ... in the Field crickets were 1.93%, 1.01% and 4.79%, respectively, and their true digestibility coefficients, determined in cecectomized roosters, were 94.1%, 85% and 96%, respectively. The TMEn of this insect meal was 2,960 kcal/kg determined in cecectomized roosters. When cornsoybean meal diets were formulated on an equal CP percentage and TMEn basis, up to 15% Field cricket could replace control diet without any adverse affects on broiler weight gain, feed intake or gain:feed ratio from 8 to 20 d posthatching. (Asian-Aust.
doi:10.5713/ajas.2005.667 fatcat:sxizb7tefnbqvgwpmcibxztfvm
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