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Zoological Research 2019年第2期40卷 121-128页

作者： Peng-Lai Fan Yi-Ming Li Craig B.Stanford Fang Li Ze-Tian Liu kai-hua yang Xue-Cong Liu College of Life Sciences University of Chinese Academy of Sciences Institute of Ecology College of Life Sciences Beijing Normal University Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences Departments of Biological Sciences and Anthropology Jane Goodall Research Center University of Southern California Shennongjia National Park

Knowledge on the home range size of a species or population is important for understanding its behavioral and social ecology and improving the effectiveness of conservation strategies. We studied the home range size of two different-sized groups of golden snub-nosed monkeys(Rhinopithecus roxellana) in Shennongjia, China. The larger group(236 individuals)had a home range of 22.5 km2 from September2007 to July 2008, whereas the smaller group(62 individuals) occupied a home range of 12.4 km2 from November 2008 to July 2009. Both groups exhibited considerable seasonal variation in their home range size, which was likely due to seasonal changes in food availability and distribution. The home range in any given season(winter, spring, summer, or winter+spring+summer) of the larger group was larger than that of the smaller group. As the two groups were studied in the same area, with the confounding effects of food availability thus minimized, the positive relationship between home range size and group size suggested that scramble feeding competition increased within the larger group.

关键词： Rhinopithecus roxellana Home range size Group size Feeding competition

Endoscopic retrograde cholangiopancreatography in children with symptomatic pancreaticobiliary maljunction: A retrospective multicenter study

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World Journal of Gastroenterology 2019年第40期25卷 6107-6115页

作者： Jing-Qing Zeng Zhao-Hui Deng kai-hua yang Tian-Ao Zhang Wen-Yu Wang Jian-Mei Ji Ya-Bin Hu Chun-Di Xu Biao Gong Department of Pediatric Digestive Diseases Shanghai Children’s Medical CenterShanghai Jiao Tong University School of MedicineShanghai 200127China Department of Digestive Diseases Shanghai Shuguang HospitalShanghai University of Traditional Chinese MedicineShanghai 201203China Department of Clinical Epidemiology and Biostatistics Shanghai Children’s Medical CenterShanghai Jiao Tong University School of MedicineShanghai 200127China Department of Pediatrics Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China

BACKGROUND Endoscopic retrograde cholangiopancreatography(ERCP)has been widely used in pediatric patients with cholangiopancreatic *** To evaluate the efficacy,safety,and long-term follow-up results of ERCP in symptomatic pancreaticobiliary maljunction(PBM).METHODS A multicenter,retrospective study was conducted on 75 pediatric patients who were diagnosed with PBM and underwent therapeutic ERCP at three endoscopy centers between January 2008 and March *** were divided into four PBM groups based on the fluoroscopy in *** clinical characteristics,specific ERCP procedures,adverse events,and long-term follow-up results were retrospectively *** Totally,112 ERCPs were performed on the 75 children with symptomatic *** manifestations included abdominal pain(62/75,82.7%),vomiting(35/75,46.7%),acholic stool(4/75,5.3%),fever(3/75,4.0%),acute pancreatitis(47/75,62.7%),hyperbilirubinemia(13/75,17.3%),and elevated liver enzymes(22/75,29.3%).ERCP interventions included endoscopic sphincterotomy,endoscopic retrograde biliary or pancreatic drainage,stone extraction,***-related complications were observed in 12 patients and included post-ERCP pancreatitis(9/75,12.0%),gastrointestinal bleeding(1/75,1.3%),and infection(2/75,2.7%).During a mean follow-up period of 46 mo(range:2 to 134 mo),ERCP therapy alleviated the biliary obstruction and reduced the incidence of *** overall effective rate of ERCP therapy was 82.4%;seven patients(9.3%)were lost to follow-up,eight(11.8%)re-experienced pancreatitis,and eleven(16.2%)underwent radical surgery,known as prophylactic excision of the extrahepatic bile duct and *** ERCP is a safe and effective treatment option to relieve biliary or pancreatic obstruction in symptomatic PBM,with the characteristics of minor trauma,fewer complications,and repeatability.

关键词： Cholangiopancreatic diseases Endoscopic retrograde cholangiopancreatography Pancreaticobiliary maljunction Pancreatitis Pediatric patients Follow-up

External use of mirabilite to prevent post-endoscopic retrograde cholangiopancreatography pancreatitis in children:A multicenter randomized controlled trial

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World Journal of Gastrointestinal Surgery 2023年第4期15卷 712-722页

作者： Jing-Qing Zeng Tian-Ao Zhang kai-hua yang Wen-Yu Wang Jia-Yu Zhang Ya-Bin Hu Jian Xiao Zhi-Jian Gu Biao Gong Zhao-Hui Deng Department of Gastroenterology Shanghai Children’s Medical CenterSchool of MedicineShanghai Jiao Tong UniversityShanghai 200127China Department of Clinical Epidemiology and Biostatistics Shanghai Children’s Medical CenterSchool of MedicineShanghai Jiao Tong UniversityShanghai 200127China Department of Gastroenterology Shanghai Shuguang HospitalShanghai University of Traditional Chinese MedicineShanghai 200021China

BACKGROUND Acute pancreatitis is the most common complication of endoscopic retrograde cholangiopancreatography(ERCP).Currently,there is no suitable treatment for post-ERCP pancreatitis(PEP)*** studies have prospectively evaluated interventions to prevent PEP in *** To assess the efficacy and safety of the external use of mirabilite to prevent PEP in *** This multicenter,randomized controlled clinical trial enrolled patients with chronic pancreatitis scheduled for ERCP according to eligibility *** were randomly divided into the external use of mirabilite group(external use of mirabilite in a bag on the projected abdominal area within 30 min before ERCP)and blank *** primary outcome was the incidence of *** secondary outcomes included the severity of PEP,abdominal pain scores,levels of serum inflammatory markers[tumor necrosis factor-alpha(TNF-α)and serum interleukin-10(IL-10)],and intestinal barrier function markers[diamine oxidase(DAO),D-lactic acid,and endotoxin].Additionally,the side effects of topical mirabilite were *** total of 234 patients were enrolled,including 117 in the external use of mirabilite group and theother 117 in the blank *** pre-procedure and procedure-related factors were notsignificantly different between the two *** incidence of PEP in the external use ofmirabilite group was significantly lower than that in the blank group(7.7%vs 26.5%,P<0.001).The severity of PEP decreased in the mirabilite group(P=0.023).At 24 h after the procedure,thevisual analog scale score in the external use of mirabilite group was lower than that in the blankgroup(P=0.001).Compared with those in the blank group,the TNF-αexpressions weresignificantly lower and the IL-10 expressions were significantly higher at 24 h after the procedurein the external use of mirabilite group(P=0.032 and P=0.011,respectively).There were nosignificant differences in serum DAO,D-lactic acid,and endotox

关键词： Children Endoscopic retrograde cholangiopancreatography Mirabilite Chronic pancreatitis Post-endoscopic retrograde cholangiopancreatography pancreatitis Randomized controlled trial

Efficacy and safety of endoscopic retrograde cholangiopancreatography in recurrent pancreatitis of pediatric asparaginase-associated pancreatitis

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World Journal of Gastrointestinal Endoscopy 2023年第10期15卷 614-622页

作者： kai-hua yang Jing-Qing Zeng Sheng Ding Tian-Ao Zhang Wen-Yu Wang Jia-Yu Zhang Lan Wang Jian Xiao Biao Gong Zhao-Hui Deng Department of Gastroenterology Shanghai Children’s Medical CenterShanghai Jiao Tong University School of MedicineShanghai 200127China Department of Gastroenterology Shanghai Shuguang HospitalShanghai University of Traditional Chinese MedicineShanghai 200120China

BACKGROUND Asparaginase(ASP)is an important drug in combined chemotherapy regimens for pediatric acute lymphoblastic leukemia(ALL);ASP-associated pancreatitis(AAP)is the main adverse reaction of *** pancreatitis is a complication of AAP,for which medication is *** To evaluate the efficacy and safety of endoscopic retrograde cholangiopancreatography(ERCP)in treating recurrent pancreatitis due to *** From May 2018 to August 2021,ten children(five males and five females;age range:4–13 years)with AAP were treated using ERCP due to recurrent *** data of the ten children were collected,including their sex,age,weight,ALL risk grading,clinical symptoms at the onset of pancreatitis,time from the first pancreatitis onset to ERCP,ERCP operation status,and postoperative *** symptomatic relief,weight change,and number of pancreatitis onsets before and after ERCP were *** The preoperative symptoms were abdominal pain,vomiting,inability to eat,weight loss of 2-7 kg,and 2-9 pancreatitis *** the operation,nine of ten patients did not develop pancreatitis,had no abdominal pain,could eat normally;the remaining patient developed three pancreatitis onsets due to the continuous administration of ASP,but eating was not *** postoperative weight gain was 1.5-8 *** was one case of post ERCP pancreatitis and two cases of postoperative infections;all recovered after *** ERCP improved clinical symptoms and reduced the incidence of pancreatitis,and was shown to be a safe and effective method for improving the management of recurrent pancreatitis due to AAP.

关键词： Acute lymphoblastic leukemia Asparaginase Endoscopic retrograde cholangiopancreatography Pancreatic pseudocyst Recurrent pancreatitis Children

Palladium installed copper-organic framework for C–C coupling reactions

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Science China Chemistry 2025年

作者： Yu-Mei Wang Mei-Xia Tao kai-Ming Mo Xu Chen Shu-hua Zhong Elena S Shubina Guo-Hong Ning Dan Li College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Supramolecular Coordination ChemistryJinan University A.N.Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences

The formation of C–C bonds is a crucial aspect of organic synthesis. Synthesists' long-term objective is to identify novel catalysts to optimize reaction systems based on traditional transition metal catalysis. This study explores the synthesis and catalytic potential of palladium-installed covalent metal-organic frameworks(CMOFs) based on copper cyclic trinuclear units(Cu-CTUs). By incorporating palladium ions into the imine-based framework JNM-7 through a straightforward immersion method, we achieved a notable enhancement in catalytic activity for critical C–C coupling reactions, including C–H arylation and Sonogashira cross-coupling. The resulting JNM-7-Pd demonstrated remarkable stability and recyclability, maintaining its efficiency over at least three cycles without any decline in efficiency.

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Love Waves in Layered Graded Composite Structures with Imperfectly Bonded Interface

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Chinese Journal of Aeronautics 2007年第3期20卷 210-214页

作者： LIU hua yang Jia-ling LIU kai-xin Institute of Solid Mechanics Beijing University of Aeronautics and Astronautics Beijing 100083 China Department of Mechanics and Engineering Peking University Beijing 100871 China

Theoretical analysis and numerical calculations of Love wave propagation in layered graded composites with imperfectly bonded interface are described in this paper. On the basis of WKB method, the approximate analytic solutions for Love waves are obtained. By the interface shear spring model, the dispersion relations for Love waves in layered graded composite structures with rigid, slip, and imperfectly bonded interfaces are given, and the effects of the interface conditions on the phase velocities of Love waves in SiC/Al layered graded composites are discussed. Numerical analysis shows that the phase velocity decreases when the defined flexibility parameter is greater. For the general imperfectly bonded interface, the phase velocity changes in the range of the velocities for the rigid and slip interface conditions.

关键词： Love wave layered graded composites WKB method dispersion relation

Simulation and Analysis of Crashworthiness of Fuel Tank for Helicopters

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Chinese Journal of Aeronautics 2007年第3期20卷 230-235页

作者： LUO Cheng LIU hua yang Jia-ling LIU kai-xin Institute of Solid Mechanics Beijing University of Aeronautics and Astronautics Beijing 100083 China Department of Mechanics and Engineering Peking University Beijing 100871 China

Crashworthiness requirement of fuel tanks is one of the important requirements in helicopter designs. The relations among the protection frame, textile layer and rubber layer of the fuel tank are introduced. Two appropriate FE models are established, one is for an uncovered helicopter fuel tank without protection frame, and the other is for fuel tank with protection frame. The dynamic responses of the two types of fuel tanks impinging on the ground with velocities of 17.3 m/s are numerically simulated for the purpose of analyzing energy-absorbing capabilities of the textile layer and protection frame. The feasibility of the current crashworthiness design of the fuel tank is examined though comparing the dynamic response behaviors of the two fuel tanks.

关键词： fuel tank crashworthiness helicopter FEM

Effects of van Hove Singularities on Transport of Quantum Dot Systems in Kondo Regime

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Communications in Theoretical Physics 2005年第3X期44卷 563-572页

作者： HU Zhi-Ming yang kai-hua TIAN Guang-Shan School of Physics Peking University Beijing 100871 China College of Applied Sciences Beijing University of Technology Beijing 100022 China

In the present paper, we study the effect of van Hove singularities of conduction electron on the transport of a single quantum dot system in the Kondo regime. By using both the equation-of-motion and the noncrossing approximation techniques, we show that the corrections caused by these singularities are actually minor. It can be explained by observing that the singularities in the equations, which determine the electronic DOS on the dot, are integrable. Furthermore, we find that, although each line width function is divergent at van Hove singular points, the total divergence is canceled out in the final formula to calculate the current through the system. Therefore, as far as the qualitative properties of the system is concerned, these singularities can be ignored and the wide-band approximation can be safely used in calculation.

关键词： quantum dot system van Hove singularities Kondo effect

Numerical Simulation of Tip Clearance Flow Passive Control in Axial Turbine

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Journal of Thermal Science 2008年第2期17卷 147-155页

作者： LI Wei QIAO Wei-yang XU kai-fu LUO hua-ling College of Propulsion and EnergyNorthwestern Polytechnical University Xi＇an 710072 China

This paper focuses on the effects of five different passive turbine tip clearance flow control methods on the tip clearance flow physics, which consists of a partial suction side squealer tip, a double squealer tip, a pressure side tip shelf with inclined squealer tip on a double squealer tip, a tip platform extension edge in pressure side and in suction side respectively. A pressure-correction based, 3D Reynolds-averaged Navier-Stokes equations CFD code with Reynolds Stress Model was adopted. The variable specific heat was considered. The detailed tip clearance flow field with different squealer rims was described with the streamline and the velocity vector. Accordingly, the mechanisms of five passive controls were elucidated; the effects of the passive controls on turbine efficiency and tip clearance flow field were illuminated. The results showed that the secondary flow loss near the outer casing including the tip leakage losses and the passage vortex losses could be reduced in all the five passive control methods. The turbine efficiency could be increased via the rational passive turbine tip clearance flow control. The Improved PS Squealer had the best effect on turbine efficiency, and the efficiency increased by 0.215%.

关键词： contact face wave receiving tube absorber

A CDR System Based on Improved Second Order Digital Filter, Hysteretic Voter and Phase Interpolator

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Chinese Journal of Electronics 2019年第6期28卷 1227-1233页

作者： ZHAO Yuyue JIANG Yingdan yang Yu SHEN Guangzhen HU kai YAN hua East Technologies Incorporated China Electronics Technology Group Corporation No.58 Research Institute

The proposed Clock and data recovery system(CDRS) has three improved parts. The second order digital filter with rounding algorithm implements fractional gain and avoids direct current quantization noise which varies between –q/2 and +q/2 while that of traditional filter varies between 0 and +q(q is quantization step). The hysteresis majority voter can combat high frequency and strong jitter especially in quasi-steady state. The improved Phase interpolator(PI) has much smaller current-switching glitch and phase glitch since the weighting current changes gradually instead of *** optimized CDRS can handle up to ±6000 ppm(parts per million) frequency offset and the phase resolution is ■/LSB(Least significant bit) according to analysis. The simulations of jitter transfer function and jitter tolerance by Matlab, simulations of phase noise by spectre using Verilog+Verilo A model, and measurements of frequency offset and jitter tolerance all show its good performance.

关键词： CDRS Bang-bang phase detector(!!PD) Hysteretic voter Second order digital filter Phase interpolator Jitter transfer Jitter tolerance