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Journal of Integrative Plant Biology 2006年第2期48卷 137-147页

作者： Xiu-Qun liu cheng-Sen li Yu-Fei Wang Laboratory of Systematic and Evolutionary Botany Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

Investigation of the Mesozoic seed plant Leptostrobus Heer from the Yangcaogou Formation of the Late Triassic and the Yixian Formation of the Early Cretaceous, liaoning Province, China, provides new Insight Into Its general morphology and geographical distribution. The materials of L. cancer from the Yixian Formation described herein are later than all the past findings of this species and add to the record of L. cancer during the Early Cretaceous. Based on well-preserved specimens, the specific diagnosis Is slightly emended and the reconstructlon of L. cancer Is perfected. The materials from the Yangcaogou Formation of the Late Triassic are placed in L. spheericus, in addition, we review the history of investigation of the genus Leptostrobus since its establishment in 1876 and discuss the main characteristics of each species.

关键词： Early Cretaceous Late Triassic Leptostrobus Yangcaogou Formation Yixian Formation.

Clock distribution system for large high altitude air shower observatory

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Nuclear Science and Techniques 2011年第6期22卷 353-357页

作者： CAO Zhe liu Shubin li cheng AN Qi State Key Laboratory of Particle Detection ＆ Electronics Anhui Key Laboratory of Physical Electronics Department of Modern Physics University of Science and Technology of China Hefei 230026 China

In this paper,we report a clock distribution system for Water Cherenkov Detector Arrays(WCDAs) in Large High Altitude Air Shower Observatory(LHAASO) *** designed electronics system is of high performance in implementing the clock distribution among detectors of a large scale of *** on Serializer/Deserializer(SerDes) and fiber transmission,the clock distribution system is the modules of central back end to distributed front *** clock distribution system has been evaluated with a two modules *** all the four SerDes candidates for clock transmission with jitters below 17 ps,the DS92LV16 has a fixed phase relationship between transmission clock and recovered clock,hence its use in LHAASO WCDAs.

关键词：分配系统天文台高海拔时钟淋浴空气探测器阵列光纤传输

Deposition of crackless freestanding diamond films on Mo substrates with Zr interlayer

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International Journal of Minerals,Metallurgy and Materials 2010年第2期17卷 246-250页

作者： Zheng liu cheng-ming li liang-xian Chen li-mei Wang li-fu Hei Fan-xiu Lu School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The Mo substrate with Zr interlayer,namely composite substrate,was employed to solve the problem of crack formation in the freestanding diamond film *** diamond films deposited on the composite substrates by the direct current arc plasma jet chemical vapor deposition（CVD） method were investigated with scanning electron microscopy（SEM）,X-ray photoelectron spectroscopy （XPS）,X-ray diffraction（XRD）,and Raman *** addition,the stress distribution during the large area freestanding diamond film deposition on the composite substrate was analyzed based on the finite element model *** results reveal that Zr interlayer can be easily destroyed during the post-deposition cooling process,which is helpful for stress release and crack avoiding in diamond films.

关键词： chemical vapor deposition diamond film interlayer thermal stress finite element analysis

First-Principle Calculations for Thermodynamic Properties of liBC Under High Temperature and High Pressure

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Communications in Theoretical Physics 2006年第3X期46卷 573-576页

作者： liu Zhong-li cheng Yan TAN Ni-Na GOU Qing-Quan Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China

The thermodynamic properties of liBC are investigated by using the full-potential linearlzed muffin-tin orbital method （FP-LMTO） within the frame of density functional theory （DFT） and using the quasi-harmonic Debye model. The dependencies of the normalized lattice parameters a/a0 and c/c0, the ratio （c/a）/2, the normalized primitive volume V/V0 on pressure and temperature are successfully obtained. It is found that the interlayer covalent interactions （li-B bonds or li-C bonds） are more sensitive to temperature and pressure than intralayer ones （B-C bonds）, as gives rise to the extreme lattice anisotropy in the bulk hop liBC.

关键词： thermal expansion heat capacity compressibility liBC full-potential linearized muffin-tin orbital

Synthesis and characterization of new soluble poly(aryl ether nitrile)s containing phthalazinone moiety

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Chinese Chemical Letters 2007年第5期18卷 595-597页

作者： Ming Jing Wang cheng liu li Ming Dong Xi Gao Jian Department of Polymer Science ＆ Materials Dalian University of Technology Dalian 116012 China

A series of novel poly（aryl ether nitrile）s containing phthalazinone moiety were synthesized by the nucleophilic displacement reaction of bisphenol-like monomers （I） with 2,6-difluorobenzonitrile. The inherent viscosities ranged from 0.46 to 1.07 dL g^-1. The glass transition temperatures were in the range of 277-295℃, and the temperatures for 10% weight loss in nitrogen atmosphere were found between 495 and 527 ℃. The structures of these resultant polymers were confirmed by FT-IR and 1^H NMR. Moreover, the properties of poly（aryl ether nitrile）s including solubility and crystallinity were also studied.

关键词： Poly(aryl ether nitrile)s Phthalazinone Heat-resistance Solubility

Study of glue extrusion after endoscopic N-butyl-2-cyanoacrylate injection on gastric variceal bleeding

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World Journal of Gastroenterology 2009年第39期15卷 4945-4951页

作者： Yan-Mei Wang liu-Fang cheng Nan li Kai Wu Jun-Shan Zhai Ya-Wen Wang Department of Gastroenterology the Second Affiliated Hospital of PLA General Hospital Beijing 100091 China

AIM:To investigate glue extrusion after endoscopic N-butyl-2-cyanoacrylate injection on gastric variceal bleeding and to evaluate the long-term efficacy and safety of this ***:A total of 148 cirrhotic patients in our hospital with esophagogastric variceal bleeding(EGVB) were included in this study.N-butyl-2-cyanoacrylate was mixed with lipiodol in a 1:1 ratio and injected as a bolus of 1-3 mL according to variceal *** underwent endoscopic follow-up the next week,fourth week,second month,fourth month,and seventh month after injection and then every 6 mo to determine the cast *** abdominal X-ray fi lm and ultrasound or computed tomographic scan were also carried out in order to evaluate the time of variceal disappearance and complete extrusion of the *** average follow-up time was 13.1 ***:The instantaneous hemostatic rate was 96.2%.Early re-bleeding after injection in 9 cases(6.2%) was estimated from rejection of *** re-bleeding occurred in 12 patients(8.1%) at 2-18 *** glue cast was extruded into the lumen within one month in 86.1% of patients and eliminated within one *** erosion was seen at the injection position and mucosa edema in the second *** glue casts were extruded in 18 patients(12.1%) after one week and in 64 patients(42.8%) after two *** kinds of glue clumping shapes and colors on endoscopic examination were observed in 127 patients(86.1%) within one month,including punctiform,globular,pillar and *** one patients(27.9%) had glue extrusion after 3 mo and 28 patients(28.9%) after six *** extrusion time was not related to the injection volume of *** was seen in 70.2%(104 cases) *** main complication was re-bleeding resulting from *** prognosis of the patients depended on the severity of the underlying liver ***:Endoscopic injection of cyanoacrylate is highly effective for gastric varices *** glue clump

关键词： Gastric variceal bleeding Glue extruded N-butyl-2-cyanoacrylate Portal hypertension

Do auditors perform governance functions？ A research on the change of performance notice

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Journal of Modern Accounting and Auditing 2010年第1期6卷 19-28页

作者： liu cheng-li Department of Accounting School of Business Qingdao Technological University Qingdao 266520 China

Whether auditors provide high-quality audit services has been a concern of academics for a long time, but it has not clear answer. In this paper the author studies this problem from the real basis of audit activities, in view of an endless stream of the performance of listed companies notice ＂change＂ phenomenon. The author finds that auditing is the important reasons of listed companies notice ＂change＂, auditor can improve disclosure quality, is the gatekeeper to accounting information. The author also finds that there may be exist collusion of listed company with auditor, SEC should enhance inspection of the implementation of listed companies notice of earnings.

关键词： notice of performance change audit governance governance functions

Recent trends of study on esophageal variceal bleeding

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Chinese Medical Journal 2010年第18期123卷 2499-2501页

作者： cheng liu-fang and li Chang-zheng Department of Gastroenterology and Hepatology Chinese People's Liberation Army General Hospital Beijing 100039 China

Esophageal variceal bleeding （EVB）, a severe complication and main mortality cause of portal hypertension, had reached a relatively mature stage in its research. The mortality rate of EVB within 5 days showed decrea... 详细信息

关键词：出血高血压门静脉基因

Microinflammation is involved in the dysfunction of arteriovenous fistula in patients with maintenance hemodialysis

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Chinese Medical Journal 2008年第21期121卷 2157-2161页

作者： liu Bi-cheng li li GAO Min WANG Yan-li YU Ji-rong Institute of Nephrology Zhong Da Hospital Southeast University Nanjing Jiangsu 210009 China

Background Vascular access （VA） dysfunction is a major clinical complication in the hemodialysis population and has a direct effect on dialysis outcome. This study was conducted to explore the role of microinflammation in the VA dysfunction in maintenance hemodialysis patients. Methods Forty-seven patients （male 35 and female 12） receiving maintenance hemodialysis were included for this study. They were divided into three groups： group 1 （n=15）, patients with initial hemodialysis and new arteriovenous fistula （AVF）; group 2 （n=18）, patients treated with hemodialysis for long term with well-functional VA; group 3 （n=14）, maintenance hemodialysis patients with VA dysfunction. Biochemical parameters and serum tumor necrosis factor-α （TNF-α）, interleukin 6 （IL-6） and monocyte chemoattractant protein-1 （MCP-1） were determined. High-sensitivity C-reactive protein （hs-CRP） was determined by latex-enhanced immuno-nephelometric method. Tissues of radial artery were taken from group 1 and group 3 for the histological study. Expression of CD68 and MCP-1 in the radial artery was determined by immunohistochemistry. Results Serum hs-CRP in group 3 was significantly higher than those in group 1 and group 2 （（7.40±2.42） mg/L vs （4.21±1.62） mg/L and （5.04±3.65） mg/L, P 〈0.01 and P 〈0.05, respectively）. Serum TNF-α in group 3 was significantly higher than those in group 1 and group 2 （（64.03±9.29） pg/ml vs （54.69±12.39） pg/ml and （54.05±7.68） pg/ml, P 〈0.05 and P 〈0.01, respectively）. Serum IL-6 in group 3 was also significantly higher than those in group 1 and group 2 （（70.09±14.53） pg/ml vs （56.43±10.11） pg/ml and （60.77±9.70） pg/ml, P 〈0.01 and P 〈0.05, respectively）. Patients in group 3 had a thicker internal layer of vessels than in group 1 （（0.356±0.056） mm vs （0.111±0.021） mm, P 〈0.01）. Expression of CD68 and MCP-1 in the fistula vessel walls in group 3 were much higher than those in group 1 （P 〈0.01）. Moreover, serum hs-CRP level was positively correlated with the neointi

关键词： microinflammation uremia arteriovenous fistula dysfunction hemodialysis

Severe airway obstruction caused by tonsillar polyp in anesthetized patient

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Chinese Medical Journal 2014年第5期127卷 990-991页

作者： Xue Fushan liao Xu liu Jianhua cheng Yi li Ruiping Department of Anesthesiology Plastic Surgery Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100144 China

The tonsillar polyp is a rare benign tumor of the pharynx.1 We describe a successful management of a case with severe airway obstruction by the tonsillar polyp after anesthesia induction in an adult patient with a known difficult *** this case,airway was successfully rescued with a difficult airway management scheme incorporating a videolaryngoscope.

关键词： airwayobstruction tonsillar polyp airway management video laryngoscope