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| 1 | Leakage Prediction Method for Contacting Mechanical Seals with Parallel Faces显示文摘Since the beginning of the 20th century, many researches on the sealing characteristic of mechanical seals were carried out broadly and in depth by various methods and some leakage models were built. But due to the lack of the way to characterize the main factors of influence on the leakage, most of the early researches were based on the assumptions that the seal faces topography and the frictional conditions were invariant. In the early built models, the effect of the surface topography change of the seal face on the leakage rate was neglected. Based on the fractal theory, the contact of end faces of the rotary and stationary rings was simplified to be the contact of a rough surface and an ideal rigid smooth surface, and the contact interface’s cavity size-distribution function as well as the fractal characteristic of the cavity profile curve was discussed. By analyzing the influence of abrasion on the seal face topography and the leakage channel, the time-correlation leakage prediction model of mechanical seals based on the fractal theory was established and the method for predicting the leakage rate of mechanical seals with parallel plane was proposed. The values of the leakage rate predicted theoretically are similar to the measured values of the leakage rate in the model test and in situ test. The experimental results indicate that the leakage rate of mechanical seals is a transient value. The surface topography of the end faces of the seal rings and its change during the frictional wear of mechanical seals can be accurately characterized by the fractal parameters. Under the work conditions of changeless frictional mechanism, the fractal parameters measured or calculated based on the accelerated testing equation can be used to predict the leakage rate of mechanical seal in service. The proposed research provides the basis for determining the leakage state and predicting working life of mechanical seal. | SUN Jianjun WEI Long FENG Xiu GU Boqin | 2010 | Chinese Journal of Mechanical Engineering2010，23，1： | 16 |
| 2 | CHARACTERISTCS OF FLUID FILM IN OPTIMIZED SPIRAL GROOVE MECHANICAL SEAL显示文摘为了调查封上的表演变化,源于结束脸的热变丑,计算液体电影的方程迫使分发,适用的力量和漏率被导出,为在平行差距并且在楔形的差距的液体电影。封上的成员的几何参数借助于热转移分析和复杂方法被优化。当旋转戒指旋转,在螺线沟结束脸的液体电影的适用的力量在扁平的结束脸比那大得多时,分析结果显示浅螺线沟能产生水动力学压力。变丑在扁平的结束脸增加液体电影的适用的力量,但是它减少在螺线沟结束的液体电影的水动力学压力面对。决定液体电影的特征的差距尺寸被在适用的力量和关门力量的平衡条件的考虑联合摩擦的热和热变丑的分析获得。为不同差距尺寸,在关门力量和漏率之间的关系也被调查,基于哪个漏率能被调整关门力量控制。 | ZHOU Jianfeng GU Boqin | 2007 | Chinese Journal of Mechanical Engineering2007，20，6： | 8 |
| 3 | The localization of type 2 diabetes susceptibility gene loci in northern Chinese Han families显示文摘We conducted a genome-wide scan, in which 358 well distributed fluorescent dye-labeled microsatellite marker sets were applied in 32 Chinese Han type 2 diabetes families from Northern China to search for the susceptibility gene loci. The data collected from screening all the chromosomes of genome were genotyped by using genescan and genotyping software, then, parametric and non-parametric multipoint test, and affected sib-pair analysis as well, were used to analyze the data. We identified some susceptibility gene loci residing in chromosomes 1,12,18,20, respectively, or precisely, located around D1S214, D1S207, D1S218, D1S235, D12S336, D18S61 and D20S118. The comparison of this result with those from other regions and races reflected the complexity and heterogeneity of type 2 diabetes. | ZHAO Jinying WANG Heng XIONG Momiao HUANG Wei ZUO Jin CHEN Zhu QIANG Boqin SUN Qi LI Yuxiu LIU Qiuying DU Weinan CHEN Jialun DING Wei YUAN Wentao ZHAO Yang XU Hongyan JIN Li FANG Fude | 2000 | Chinese Science Bulletin2000，45，19： | 8 |
| 4 | INVESTIGATION INTO EFFECT OF SPRING PRESSURE ON PERFORMANCE OF BALANCED MECHANICAL SEALS显示文摘The loads acting on the sealing elements of balanced mechanical seals are analyzed. When the balance factor approaches the back pressure factor, the spring pressure will become main part of the face pressure. The leakage model of balanced mechanical seals is established on the base of M-B model for rough surface. Several GY-70 type balanced mechanical seals are tested. The influences of the spring pressure both on the leakage rate and on the friction characteristic of balanced mechanical seals are investigated. The research results indicate that as spring pressure increases, both the clear-ance between two end faces and the leakage rate will decrease, and the friction will be more serious because lubrication medium between the rotating ring and the stationary ring reduces, though the increase of the spring pressure may not be enough to change the face friction state of mechanical seals. There exists an optimum spring pressure for mechanical seal operation. Under this spring pres-sure, not only leakage rate is small, but also the seal end surfaces have a fine friction characteristic. Under different operating conditions, identical type mechanical seals may possess different spring pressure. Appropriate selection of spring pressure is valuable to realize long-period and small leakage rate operating of balanced mechanical seals. | SUN Jianjun GU Boqin | 2007 | Chinese Journal of Mechanical Engineering2007，20，3： | 7 |
| 5 | Boundary velocity slip of pressure driven liquid flow in a micron pipe显示文摘The velocity slip of gas flow in a micron channel has been widely recognized.For pressure driven liquid flow in a macro pipe,theminute velocity slip at the wall boundary is usually neglected.With a decreasing scale in the cross section of the flow passage,the effect of velocity slip on flow and heat transfer behaviors becomes progressively more noticeable.Based on the three Hamaker homogeneous material hypotheses,the method for calculating the acting force between the solid and liquid molecular groups is established.By analyzing the forces exerted on the liquid group near the pipe wall,it is found that the active force arising from the rough solid wall can provide the component force to resist the shearing force and keep the liquid group immobile.Based on this a velocity slip criterion is proposed.Considering the force balance of a slipping liquid group,the frictional force caused by the solid wall can be obtained and then the velocity of the liquid group can be calculated using the derived coefficient of friction.The investigation reveals that,in a micron pipe,a small velocity slip may occur when the flow pressure gradient is relatively large,and will cause errors in the pipe flow estimates. | ZHOU JianFeng GU BoQin SHAO ChunLei | 2011 | Chinese Science Bulletin2011，56，15： | 7 |
| 6 | Missed Nursing Care显示文摘BeatriceJKalisch博士,密西根大学护理学院提图斯杰出教授,已出版10部书籍,发表科研论文超过150篇,在世界各地包括中国、加拿大、澳大利亚等国家做了800多场专题报告,并被美国国家医学科学院(Institute of Medicine)聘为2013~2014年护理驻院学者(Scholar-in-Residence)。她在病人安全、护理团队工作、护理缺失、护士形象、联邦基金对护理教育及实践的影响等方面进行了大量研究并取得了丰硕成果。Kalisch博士为本刊撰文,全面介绍了其护理缺失的研究:发现护理缺失的现象,通过质性研究对护理缺失进行概念分析,如何构建研究的理论框架,发展护理缺失的测量工具,医院护理缺失的现状调查,人员结构与护理缺失的关系,护理人员离职、满意度等与护理缺失的关系,患者结局与护理缺失,患者对护理缺失的认知。希望本文能帮助读者关注护理缺失,同时能对如何系统开展科学研究有所裨益。 | Beatrice J Kalisch Boqin Xie | 2014 | 护理学杂志(综合版)2014，29，5： | 6 |
| 7 | SIMS U-Pb dating of rutile within eclogitic xenoliths in the Early Cretaceous adakitic rocks of the Xuzhou-Huaibei area, China: Constraints on the timing of crustal thickening of the eastern North China Craton显示文摘This paper reports the results of secondary ion mass spectrometry(SIMS) U-Pb dating of rutile within eclogitic xenoliths from the Early Cretaceous adakitic rocks in the Xuzhou-Huaibei area of China and discusses the geological significance of these new dates. The dating of rutile from pargasite-bearing eclogite and garnet clinopyroxenite(retrograde eclogite) yielded ages of 209 ± 25 and 132 ± 7 Ma, respectively. The former is consistent with the timing of the first stage of exhumation of the Dabie-Sulu orogenic belt and provides evidence of crustal thickening within the southeastern margin of the North China Craton during the early Mesozoic, related to subduction and collision between the Yangtze and North China cratons. The latter age is similar to the timing of emplacement of the hosting intrusion and indicates that the rutile U-Pb system was triggered after uplifting by the intrusion of the hosting magmas. It implies that garnet clinopyroxenite was previously at the depth where the temperature was above the rutile U-Pb closure temperature. | XIONG BoQin XU WenLiang LI QiuLi YANG DeBin ZHOU QunJun | 2015 | Science China Earth Sciences2015，58，7： | 4 |
| 8 | Isolation and expression pattern analysis of novel ESTs from human fetal brain显示文摘In order to learn the mechanism of brain development and differentiation, 90 expressed sequence tags (ESTs) were isolated by differential display from the cerebrum and cerebellum of 13-week and 33-week fetal brains. After searching database, 74 of them represented novel genes, some of them were homologous to the brain development related genes. Using total cDNA probes, 79 of the ESTs and their expression differences in fetal brain were further characterized. | Meihui Pan Jiangang Yuan Guangwei Du Yan Zhou Hui Yao Boqin Qiang | 1998 | Chinese Science Bulletin1998，43，21： | 3 |
| 9 | Formation of wormlike mi-celles in anionic surfactant AES aqueous solutions显示文摘The growth and structure of anionic micelles of sodium dodecyl trioxyethylene sulfate (AES) in the presence of multivalent counterion Al3+ were investigated by means of dynamic rheological methods. It has been obtained by themeasurements of shear viscosity, complex viscosity anddynamic moduli, as well as the application of Cox-Merz rule and Cole-Cole plot that wormlike micelle and networkstructure could be formed in AES/AlCl3 aqueous solutions. The structure was of a character of nonlinear viscoelasticfluid and departure from the simple Maxwell model. Thetechnique of freeze-fracture transmission electronmicroscopy (FF-TEM) was also used to confirm theformation of this interesting structure. | MU Jianhai LI Ganzuo XIAO Hongdi LIAO Guangzhi LIU Yi HUANG Li LI Boqin | 2001 | Chinese Science Bulletin2001，46，16： | 2 |
| 10 | Frictional heat transfer regularity of the fluid film in mechanical seals显示文摘The frictional heat transfer regularity in the mechanical seal system consisting of the rotating ring, the stationary ring, the fluid film in the end faces and the sealed medium was investigated. The primary factors affecting the frictional heat transfer regularity, such as the heat transfer coefficients from the rings to the sealed medium, the frictional heat flux, the frictional heat distribution ratio and so on, were discussed. The equations for calculating the temperature field both in the sealing members and in the fluid film were derived. The coupling analysis of the frictional heat of the fluid film and the thermal deformation of the two end faces of the rings was carried out to obtain the separation angle of the two deformed end faces in consideration of the viscosity change of the fluid film. The results indicate that the frictional heat of the fluid film heavily affects its characteristic and the sealing performance of mechanical seals. The frictional heat changes not only the shape of the gap between the end faces but also the viscosity of the fluid film, and thereupon leads to the increase of the leakage rate. The maximum temperature of the system is at the inner radius of the fluid film, and most of the frictional heat is conducted by the rotating ring. Based on the heat transfer analysis method put forward in this paper, the parameterized design of mechanical seals can be realized to determine the best geometrical parameters and to select the appropriate material of the sealing members. | GU BoQin ZHOU JianFeng CHEN Ye SUN JianJun | 2008 | Science China(Technological Sciences)2008，51，5： | 2 |
| 11 | 二维核磁共振岩石物理显示文摘二维核磁共振(2DNMR)为岩石物理勘探开辟了广阔领域并对石油测井技术产生了重大影响。当孔隙介质中饱和了不同扩散系数的复杂流体时,能从固定脉冲序列或变化的双窗序列CPMG测量中提取并清晰地描述出这种信息。用T2弛豫时间和扩散系数这两个独立变量绘制的二维NMR图中能清楚地区分出岩石中油和水。二维核磁共振中的“二维”可扩展到研究孔隙介质中渗透的两个或更多独立的流体变量,如化学位移,T1/T2弛豫时间比(反映孔隙大小)、质子数量以及扩散对比等。 | Boqin Sun Keh-jim Dunn 肖亮(译) 陈兆明(校) | 2006 | 国外测井技术2006，21，4： | 2 |
| 12 | Identification of Functional Genetic Variants in Cyclooxygenase-2 and Their Association With Risk of Esophageal Cancer显示文摘 | Xuemei Zhang Xiaoping Miao Wen Tan Baitang Ning Zhihua Liu Yuan Hong Wenguang Song Yongli Guo Xinyu Zhang Yan Shen Boqin Qiang Fred F. Kadlubar Dongxin Lin | 2005 | Gastroenterology2005，，2： | 1 |
| 13 | Research on question bank constructing and automatic marking design for network open examination system显示文摘 | Liu Boqin | 2012 | Advances in Information Sciences and Service Sciences2012，4，23： | 1 |
| 14 | RNA-binding Protein UNR Promotes Glioma Cell Migration and Regulates the Expression of Ribosomal Protein L9显示文摘Objective To investigate the role of RNA binding protein—upstream-of-N-Ras(UNR)in the development of glioma and its molecular mechanism.Methods First,bioinformatics analysis of CGGA database was performed to detect UNR expression level and prognosis of patients with glioma.Western blot and real-time PCR were used to detect UNR expression level in glioma cell lines and tissues.Next,UNR siRNAs were transfected in glioma cells,and MTS assay and scratch wound-healing assay were used to detect changes in cell proliferation and migration.Then,the candidate UNR target mRNAs were identified by analyzing the sequencing data of UNR iCLIP-seq,RNA sequencing and ribosome profiling databases of human melanoma.RNA immunoprecipitation and biotin pull-down assays were used to identify the UNR target mRNAs in glioma cells.Finally,western blot was used to detect the effect of UNR knockdown on ribosomal protein L9(RPL9)and RPL9 protein expression level in glioma cell lines.RPL9 siRNA was transfected in A172 and T98G and the expression of vimentin in the cells was detected with western blot.Results Bioinformatics analysis showed that UNR mRNA expression level was significantly higher in highgrade glioma[GradeⅡ(n=126),GradeⅢ(n=51),GradeⅣ(n=128),P<0.001].UNR high expression levels were associated with poor prognosis(P=0.0177).UNR had high expression level in glioma cell lines and patient samples compared with normal cell lines and normal brain samples(P<0.01).Knockdown of UNR inhibited glioma cells migration(P<0.05),but did not inhibit glioma cells growth in three glioma cell lines.UNR binded the 3’untranslated region(UTR)of PTEN and RPL9 mRNAs.RPL9 protein was significantly highly expressed in most glioma cell lines(n=9)and knockdown of UNR resulted in a downregulation of RPL9 protein expression. | Ningyu Tian Yingjiao Qi Yan Hu Bin Yin Jiangang Yuan Boqin Qiang Xiaozhong Peng Wei Han | 2018 | Chinese Medical Sciences Journal2018，33，3： | 1 |
| 15 | Identification of Functional Genetic Variants in Cyclooxygenase-2 and Their Association With Risk of Esophageal Cancer显示文摘 | Xuemei Zhang Xiaoping Miao Wen Tan Baitang Ning Zhihua Liu Yuan Hong Wenguang Song Yongli Guo Xinyu Zhang Yan Shen Boqin Qiang Fred F. Kadlubar Dongxin Lin | 2005 | Gastroenterology2005，，2： | 1 |
| 16 | Interpolation of Bα space 显示文摘 | Chen Guangrong Meng Boqin | 1998 | Acta Math Scientia1998，8，1： | 1 |
| 17 | Improving the prediction of human microRNA target genes by using ensemble algorithm显示文摘 | Xingqi Yan Tengfei Chao Kang Tu Yu Zhang Lu Xie Yanhua Gong Jiangang Yuan Boqin Qiang Xiaozhong Peng | 2007 | FEBS Letters2007，，8： | 1 |
| 18 | Identification of Functional Genetic Variants in Cyclooxygenase-2 and Their Association With Risk of Esophageal Cancer显示文摘 | Xuemei Zhang Xiaoping Miao Wen Tan Baitang Ning Zhihua Liu Yuan Hong Wenguang Song Yongli Guo Xinyu Zhang Yan Shen Boqin Qiang Fred F. Kadlubar Dongxin Lin | 2005 | Gastroenterology2005，，2： | 1 |
| 19 | Budd-Chiari syndrome:in evolution显示文摘 | Boqin V Marcos A Shaw-Stiffel T | 2005 | Eur J Gastroenterol Hepatol2005，17，1： | 1 |
| 20 | Forum on frontiers of science and technology:Lifeomics and translational medicine显示文摘The Chinese Academy of Sciences held its 7th forum on frontiers of Science and Technology,April 12-13,2012,in the academy hall of the Chinese Academy of Sciences.The Forum was organized by the Life Science and Medicine Division and co-organized by Academy of Military Medical Sciences and Science China Press.The theme of the 7th Forum was 'Lifeomics and Translational Medicine',and the purpose was to discuss the significance of lifeomics(i.e., | QIANG BoQin HE FuChu ZENG YiXin | 2013 | Science China(Life Sciences)2013，56，3： | 1 |
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