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Search Results: 1 - 10 of 13119 matches for " Dongsheng Luo "
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The P2P Risk Assessment Model Based on the Improved AdaBoost-SVM Algorithm  [PDF]
Jianhui Yang, Dongsheng Luo
Journal of Financial Risk Management (JFRM) , 2017, DOI: 10.4236/jfrm.2017.62015
Abstract: The improved AdaBoost-SVM algorithm is used to classify the safety and the risk from the Peers-to-Peers net loan platforms. Since the SVM algorithm is hard to deal with the rare samples and its training is slow, rule sampling is used to reduce the classify noise. Then, with the combinations of learning machine, P2P risks can be identified. The result shows that IAdaBoost algorithm can improve the risk platform classification accuracy. And the error of classification can be controlled in 5%.
Abatement of Pollution in Process of Synthesizing Carbon Oxysulfide by Using a New Catalyst
采用新催化剂消除氧硫化碳合成中的环境污染

Luo Dongsheng,
罗东升

环境科学 , 1989,
Abstract: This paper deals with a waste-free technology. In the process of synthesizing carbon oxysulfide (COS), a new catalyst has been used to replace 13X molecular sieve, so (that the yield of COS can tise from 65% to 90%. Because of enhancement of synthetic gas quality and re duction of hazardous gas, the system of gas purification would he removed in the process. by which environmental eontamirianon is eliminated. The catalyst process is simple, the cost is low and life span of the catalyst is long. Annually, taking count oi output, of COS 7000 NM3, 1500 tons of waste lye and 45 tons of waste CS2 will be decreased.
Chicken Mesenchymal Stem Cells as Feeder Cells Facilitate the Cultivation of Primordial Germ Cells from Circulating Blood and Gonadal Ridge  [PDF]
Dongsheng Li, Zhisheng Chen, Shengfeng Chen, Huiqin Ji, Xiaoshu Zhan, Dongzhang Luo, Huina Luo, Bingyun Wang
Stem Cell Discovery (SCD) , 2019, DOI: 10.4236/scd.2019.91001
Abstract: Long-term maintenance of chicken primordial germ cells (PGCs) in vitro has tremendous potential for transgenic chicken production. Feeder cells are essential for the establishment and culture of chicken PGCs in vitro. Buffalo rat liver (BRL) cells are the most commonly used feeder cells for PGCs culture; however, this feeder layers from other animal species usually cause immunogenic contaminations, compromising the potential of PGCs in applications. Therefore, we tested chicken source mensenchymal stem cell (MSCs) derived from bone marrow as feeder cells to further improve PGC culture conditions. MSCs derived from chicken bone marrow have a powerful capacity to proliferate and secrete cytokines. We found chicken primordial germ cells derived from circulating blood (cPGCs) and gonads (gPGCs) can be maintained and proliferated with MSCs feeder layer cells. PGCs co-cultured on MSCs feeder retained their pluripotency, expressed PGCs specific genes and stemness markers, and maintained undifferentiated state. Our study indicated that the xeno-free MSCs-feeders culture system is a good candidate for growth and expansion of PGCs as the stepping stone for transgenic chicken research.
Magnetic susceptibility properties of polluted soils
Luo Wang,Dongsheng Liu,Houyuan Lü
Chinese Science Bulletin , 2000, DOI: 10.1007/BF02898995
Abstract: An investigation of magnetic properties using magnetic susceptibility (χ) and frequency-dependent susceptibility (χfd) was conducted on representative modern pollutants, which include smelted slag dust, automobile exhaust dust and coal ash. Their magnetic susceptibility values are more than 500ξ108 m3/kg, and frequency-dependent susceptibility values less than 3%, indicating that ample ferrimagnetic and scanty superparamagnetic grains occurred in the studied pollutants. Similar to the artificially synthetic polluted soils, the industrially-polluted soils display a negative relationship between magnetic susceptibility and frequency-dependent susceptibility. However, the unpolluted soils, e.g. the Quaternary loess in the Chinese Loess Plateau, show a positive relationship between them. In this note, we propose a convenient and effective approach for identifying the polluted soils.
Research on P2P Credit Risk Assessment Model Based on RBM Feature Extraction—Take SME Customers as an Example  [PDF]
Jianhui Yang, Qiman Li, Dongsheng Luo
Open Journal of Business and Management (OJBM) , 2019, DOI: 10.4236/ojbm.2019.74107
Abstract: This paper combines the nonlinear dimensionality reduction method, and the Restricted Boltzmann machine (RBM algorithm), to assess the credit risk of P2P borrowers. After screening and processing many big data indicators, the most representative indicators are selected to build the P2P customer credit risk assessment model. In addition, after comparing the advantages and disadvantages of linear dimensionality reduction algorithm and nonlinear dimensionality reduction algorithm, this paper establishes a P2P enterprise customer credit risk assessment model based on RBM feature extraction combined with contrast divergence theory. It is concluded that the effect of RBM is better than that of PCA when the same model is selected. The Logistic model performs best in the three models when the same data feature extraction method is selected.
The Development of Foreign Capital Insurance Market, FDI and Economic Growth in China  [PDF]
Dongsheng Wang, Yumei Li
Modern Economy (ME) , 2019, DOI: 10.4236/me.2019.103058
Abstract: This paper analyzes the relationship among foreign capital insurance market, FDI and economic growth in China. We use unit root test, least square regression and Granger causality test to examine the relationship with the data over the period 1984-2015. It is found that the development of China’s foreign capital insurance market has not promoted China’s economic growth, FDI has promoted China’s economic growth, and China’s economic growth has generally promoted the development of foreign capital insurance market. The channels of insurance market acting on economic growth are not smooth enough for foreign capital in China, and its action modes may be mainly applicable to China’s domestic insurance market.
Distribution feature of terrestrial heat flow densities in the Bohai Basin, East China
Liangshu Wang,Shaowen Liu,Weiyong Xiao,Cheng Li,Hua Li,Suiping Guo,Bo Liu,Yuhui Luo,Dongsheng Cai
Chinese Science Bulletin , 2002, DOI: 10.1360/02tb9193
Abstract: Temperature logging curves at 8 boreholes and well-testing temperature data at 142 boreholes are used to determine geotemperature gradients in the Bohai Basin. The thermal conductivities of 86 rock samples are measured at laboratory and the effects of porosity and temperature are corrected to obtain conductivities in situ. Terrestrial heat flow densities at 76 wells are determined based on these data. The distribution of the heat flow indicates that the terrestrial heat flow in the Bohai Basin is relatively high with an average value of 65.8 mW/m2. This characteristic is caused by the tectonic evolution of the basin. During Cenozoic, the lithosphere stretched intermittently and the crust thinned so that heat conducted from the mantle increased and formed thermal abnormity at depth beneath the basin.
Distribution feature of terrestrial heat flow densities in the Bohai Basin, East China

WANG Liangshu,LIU Shaowen,XIAO Weiyong,LI Cheng,LI Hua,GUO Suiping,LIU Bo,LUO Yuhui,CAI Dongsheng,

科学通报(英文版) , 2002,
Abstract: Temperature logging curves at 8 boreholes and well-testing temperature data at 142 boreholes are used to determine geotemperature gradients in the Bohai Basin. The thermal conductivities of 86 rock samples are measured at laboratory and the effects of porosity and temperature are corrected to obtain conductivities in situ. Terrestrial heat flow densities at 76 wells are determined based on these data. The distribution of the heat flow indicates that the terrestrial heat flow in the Bohai Basin is relatively high with an average value of 65.8 mW/m2. This characteristic is caused by the tectonic evolution of the basin. During Cenozoic, the lithosphere stretched intermittently and the crust thinned so that heat conducted from the mantle increased and formed thermal abnormity at depth beneath the basin.
Duchenne muscular dystrophy gene therapy: Lost in translation?
Dongsheng Duan
Research and Reports in Biology , 2011, DOI: http://dx.doi.org/10.2147/RRB.S13463
Abstract: chenne muscular dystrophy gene therapy: Lost in translation? Review (4852) Total Article Views Authors: Dongsheng Duan Published Date March 2011 Volume 2011:2 Pages 31 - 42 DOI: http://dx.doi.org/10.2147/RRB.S13463 Dongsheng Duan Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO, USA Abstract: A milestone of molecular medicine is the identification of dystrophin gene mutation as the cause of Duchenne muscular dystrophy (DMD). Over the last 2 decades, major advances in dystrophin biology and gene delivery technology have created an opportunity to treat DMD with gene therapy. Remarkable success has been achieved in treating dystrophic mice. Several gene therapy strategies, including plasmid transfer, exon skipping, and adeno-associated virus-mediated microdystrophin therapy, have entered clinical trials. However, therapeutic benefit has not been realized in DMD patients. Bridging the gap between mice and humans is no doubt the most pressing issue facing DMD gene therapy now. In contrast to mice, dystrophin-deficient dogs are genetically and phenotypically similar to human patients. Preliminary gene therapy studies in the canine model may offer critical insights that cannot be obtained from murine studies. It is clear that the canine DMD model may represent an important link between mice and humans. Unfortunately, our current knowledge of dystrophic dogs is limited, and the full picture of disease progression remains to be clearly defined. We also lack rigorous outcome measures (such as in situ force measurement) to monitor therapeutic efficacy in dystrophic dogs. Undoubtedly, maintaining a dystrophic dog colony is technically demanding, and the cost of dog studies cannot be underestimated. A carefully coordinated effort from the entire DMD community is needed to make the best use of the precious dog resource. Successful DMD gene therapy may depend on valid translational studies in dystrophin-deficient dogs.
Measuring the angle $\gamma$ of the unitarity triangle in $B_s$ decays into CP eigenstates
Du, Dongsheng
High Energy Physics - Phenomenology , 2007,
Abstract: In this paper penguin contribution has not been included, so it is not suitable to be published.
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