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| 1 | A study of hydrate plug formation in a subsea natural gas pipeline using a novel high-pressure flow loop显示文摘The natural gas pipeline from Platform QK18-1 in the southwest of Bohai Bay to the onshore processing facility is a subsea wet gas pipeline exposed to high pressure and low temperature for a long distance. Blockages in the pipeline occur occasionally. To maintain the natural gas flow in the pipeline, we proposed a method for analyzing blockages and ascribed them to the hydrate formation and agglomeration. A new high-pressure flow loop was developed to investigate hydrate plug formation and hydrate particle size, using a mixture of diesel oil, water, and natural gas as experimental fluids. The influences of pressure and initial flow rate were also studied. Experimental results indicated that when the flow rate was below 850 kg/h, gas hydrates would form and then plug the pipeline, even at a low water content (10%) of a water/oil emulsion. Furthermore, some practical suggestions were made for daily management of the subsea pipeline. | Li Wenqing Gong Jing Lü Xiaofang Zhao Jiankui Feng Yaorong Yu Da | 2013 | Petroleum Science2013，10，1： | 11 |
| 2 | Factors influencing the declining trend of vasectomy in Sichuan,China 显示文摘 | Nian C Xiaozhang L Xiaofang P et a/ | 2010 | Southeast Asian J Trop Med Public Health2010，41，4： | 1 |
| 3 | A C terminal hydrophobic region is required for homo-oligomerization of the hepatitis E virus capsid (ORF2)protein 显示文摘 | XIAOFANG L ZAFRULLAH M AHMAD F | 2001 | J Biomed Biotechnol2001，1，： | 1 |
| 4 | A rapid audio event detection method by adopting 2D-Haar acoustic super feature vector显示文摘For accuracy and rapidity of audio event detection in the mass-data audio processing tasks,a generic method of rapidly recognizing audio event based on 2D-Haar acoustic super feature vector and AdaBoost is proposed.Firstly,it combines certain number of continuous audio frames to be an 'acoustic feature image',secondly,uses AdaBoost.MH or fast Random AdaBoost feature selection algorithm to select high representative 2D-Haar pattern combinations to construct super feature vectors;thirdly,analyzes the commonality and differences between subcategories,then extracts common features and reduces different features to obtain a generic audio event template,which can support the accurate identification of multiple sub-classes and detect and locate the specific audio event from the audio stream accurately.Experimental results show that the use of 2D-Haar acoustic feature super vector can make recognition accuracy 5% higher than ones that MFCC,PLP,LPCC and other traditional acoustic features yielded,and can make the training processing 7-20 times faster and the recognition processing 5-10 times faster,it can even achieve an average precision of 93.38%,an average recall of 95.03% under the optimal parameter configuration found by grid method.Above all,it can provide an accurate and fast mass-data processing method for audio event detection. | L Ying LUO Senlin GAO Xiaofang XIE Erman PAN Limin | 2015 | Chinese Journal of Acoustics2015，34，2： | 1 |
| 5 | Intravenous micro-particle injections and pulmonary hypertension in broiler chickens:acute post-injection mortality and ascites susceptibility显示文摘 | Wideman Jr R F Erf G F Chapman M E Wang W Anthony N B Xiaofang L | | 0，，08： | 1 |
| 6 | Correlation between promoter methylation of pl 4 ( ARF), TMSI/ASC, and DAPK, and p53 mutation with prognosis in cholangiocarcinoma显示文摘 | Xiaofang L Kun T Shaoping Y | 2012 | World J Surg Onco12012，10，： | 1 |
| 7 | The test and evaluation of wearability fot the Tibetan Pulu fabric 显示文摘 | GUO Xiaofang WANG Yunyi L! Jun | 2012 | Journal of Donghua University2012，38，2： | 1 |
| 8 | 查看详情显示文摘 | Chunhai F Haiyun S Xiaofang H Genxi L Jianqin Z Xianxiu X Dexu Z | | 0，，： | 1 |
| 9 | Correlation between pro moter methylation of p14ARF, TMS1/ASC, and DAPK, and p53 mutation with prognosis in cholangioearcinoma显示文摘 | Xiaofang L Kun T Shaoping Y | 2012 | World J Surg Oncol2012，10，： | 1 |
| 10 | Effects of diets supplemented with zinc and manganese on performance and related parameters in laying hens显示文摘 | Yang X Zhong L Xiaofang A N | 2012 | Animal Science Journal2012，83，6： | 1 |
| 11 | Laparoscopic hemionhaphy combined ligafion of the hernial sac and suturation of the internal ring in children with indirect inguinal hernias显示文摘 | Jialin L Hanxin Z Xiaofang Y | 2007 | Surg Laparosc Endosc Percutan Tech2007，17，2： | 1 |
| 12 | Spin-orbit coupling and zero-field splitting of the high-spin ferric enzyme-substrate complex:Protocatechuate 3,4-dioxygenase complexed with 3,4-dihydroxyphenylacetate显示文摘We used density functional calculations to investigate the electronic origins of the magnetic properties of the high-spin ferric enzyme-substrate complex protocatechuate 3,4-dioxygenase(3,4-PCD).The calculated g-tensors show that ligand-to-metal charge transfer transitions are from the protocatechuate(PCA) and Tyr408 orbitals to the Fe d orbitals,which lead to x-and y-polarized transitions.These polarized transitions require a spin-orbit coupling(SOC) matrix element in the z-direction,Lz(z=z'),resulting in a g z value of 2.0158,significantly deviating from 2.0023.A large zero-field splitting parameter value of+1.147cm-1 is due to △S =-1 spin-orbit mixing with the quartet states for the sextet ground state,accounting for around 73% of the SOC contribution.The SOC matrix elements indicate that the high-spin d 5 system Fe(Ⅲ),3,4-PCD-PCA is a weak spin-crossover compound with an SOC of 31.56 cm-1. | Lü LingLing ZHU YuanCheng WANG XiaoFang ZUO GuoFang GUO Feng ZHAO SuRui WANG YongCheng | 2013 | Chinese Science Bulletin2013，58，6： | 1 |
| 13 | Theoretical study of spin-orbit coupling and zero-field splitting in the spin-forbidden two-state reaction between cobaltacyclopentadiene and isocyanate显示文摘The two-state reaction mechanism of CpCo(C_4H_4)with isocyanate on the triplet and singlet potential energy surfaces has been investigated at the B3LYP level.A study is described for the computation of spin-orbit coupling of triplet state of the minimal energy crossing point(CP)with their singlet states and of the zerofield splitting(ZFS)parameters of the triplet states,including the full one-and two-electron terms of the BreitPauli Hamiltonian.There are two key crossing points along this two-state reaction pathway.The first crossing point—CP2 exists near^1B.The reacting system will change its spin multiplicity from the triplet state to the singlet state near this crossing region.Although the spin-orbit coupling interaction and ZFS D-tensor of the CP2 region are very strong,the reaction system will occur the reverse intersystem crossing from T_1 to S_0.Therefore,its spin-flip efficiency may be lower.The second crossing point,CP3will again change its spin multiplicity from the singlet state to the triplet state in the Co-Cr bond activation pathway,leading to a decrease in the barrier height of^1TS(CF)from19.5 to 9.5 kcal/mol(1cal=4.182 J),and the efficiency of intersystem crossing from S_0 to T_1 is high because the larger spin-orbit coupling(SOC)matrix elements will result in the overpopulations of the three sublevels of T_1(3.30×10^(-1),3.32×10^(-1),and 3.38×10^(-1),respectively). | Lingling L Xiaofang Wang Yuancheng Zhu Xinwen Liu Kun Yuan Yongcheng Wang | 2014 | Chinese Science Bulletin2014，59，3： | 0 |
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