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煤炭技术 2012年第4期31卷 212-214页

作者：王世轶贵阳医学院贵阳550004

介绍了LDAP协议的技术原理,并对基于LDAP技术的单点登录系统做出了研究,旨在设计一种高效、安全的用户登录系统。

关键词：目录服务 LDAP协议单点登录

Temporal expression of c-kit in spermatogenesis of two grasshopper species

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Insect Science 2006年第6期13卷 445-450页

作者： ZHUO ZHAO SHU-MIN LU GENG-si XI College of Life Sciences Jilin Normal University Siping Jilin College of Life Sciences Shaanxi Normal UniversityXi' an China

Two species of grasshoppers, Calliptamus abbreviatus （Ikonn.） and Shirakiacris shirakii （I. Bol.）, were collected randomly in the siping area of Jilin Province, China. By using immunohistochemical methods and statistical analysis, we observed and compared the temporal expression of c-kit protein in four representative stages of spermatogenesis of the two grasshoppers, namely： spermatogonia; primary spermatocyte; secondary spermatocyte; and mature sperm. Results showed that there was c-kit positive temporal expression at each stage of spermatogenesis, but there were different positive expression levels：（i） weak positive expression of c-kit protein appeared in spermatogonia and the positive granules were thinner; （ii） strong positive expression of c-kit protein existed in primary spermatocyte and positive granules became biggest among all developmental stages; （iii） c-kit positive expression stayed stronger in secondary spermatocyte while positive granules became thinner; （iv） there was a strong positive expression of c-kit and thinner positive granules in mature sperm, which distributed on head and tail; （v） the biggest c-kit positive granules had been found massing at the end of spermary; and （vi） significant differences of c-kit positive expression existed in spermatogenesis between two species of grasshoppers. The results indicated that c-kit protein may play a crucial role in spermatogenesis and even retain the physiological action of sperms and fertilization in grasshoppers.

关键词： c-kit protein grasshoppers spermatogenesis temporal expression

Recent advances of phase engineering in group vi transition metal dichalcogenides

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Tungsten 2019年第1期1卷 46-58页

作者： Lingjia Meng Yang Ma Kunpeng si Shiyu Xu Jinliang Wang Yongji Gong School of Physics and Nuclear Engineering Beihang UniversityBeijing 100191China School of Materials Science and Engineering Beihang UniversityBeijing 100191China

As the crystal quality and phase structure of two-dimensional(2D)transition metal dichalcogenides(TMDs)have significant impacts on their properties such as electroconductivity,superconductivity and chemical stability,the precise synthesis,which plays an important role in fundamental researches and industrial applications,is highly *** vi TMDs,such as MoS_(2),usually exhibit diverse polymorphs including semiconducting 1H and metallic 1T *** great efforts are devoted to revealing the structure-dependent physicochemical nature of TMDs by modulating their phases from the stable to the metastable at the atomic scale,there are still challenges on the phase-controlled synthesis of Group vi TMDs with metallic or semimetal *** this review,methods such as ion intercalation,chemical doping,strain engineering,defect triggering,and electric-field treatment are examined in ***,challenges and opportunities in this research field are proposed.

关键词： Phase transition engineering Transition metal dichalcogenides Two-dimensional materials Molybdenum disulfide Tungsten disulfide

Population dynamics and protection strategies of Litsea coreana *** with Guizhou Province in China as an example

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Journal of Mountain Science 2023年第4期20卷 1090-1101页

作者： YUAN Gang-yi GUO Qi-qiang XIE Na ZHANG Ya-qin LUO si-qiong GUI Qin YAO Shan Institute for Forest Resources and Environment of Guizhou College of ForestryGuizhou UniversityGuiyang550025China

Studying the dynamics of plant populations is crucial to the conservation and management of endangered *** diameter at breast height(DBH),tree height,crown width,and environmental factors of a total of 15 plots in five populations in Guizhou Province,China were measured in this *** method of substituting diameter at breast height for age was used to divide the population into 7 age *** age structure,static life table,and relationship between the population characteristics and environmental factors of the Litsea coreana *** population were ***,the time series model was used to predict the population *** showed that the age structure of population in Zhengan County(Population ZA)had an inverted Jshape with abundant seedlings and insufficient middle-aged and elderly *** age structures of populations in Daozhen County(Population DZ),Kaiyang County(KY),Meitan County(Population MT),and Xishui County(Population XS)were spindle-shaped with few young individuals and many middle-aged and elderly *** mortality rate of each population fluctuated with the increase in age class,and the populations were extremely *** survival curve was close to the Deevey III type,and the degree of deviation was related to the lack of young *** the age stages II,IV,and vi,the number of aged plants in the different populations initially increased then decreased,and population stability was difficult to *** analysis showed that the DBH,tree height and crown width of the population decreased with the increase of annual mean temperature,and the population density was restricted by soil nutrient conditions to a certain *** results of this work provide scientific basis for the conservation and sustainable utilization of natural populations of *** *** in Guizhou Province,China.

关键词： Litsea coreana var.sinensis Age structure Survival curve Time series prediction Environmental factor

A new approach to LST modeling and normalization under clear-sky conditions based on a local optimization strategy

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International Journal of Digital Earth 2022年第1期15卷 1833-1854页

作者： Majid Kiavarz Mohammad Karimi Firozjaei Seyed Kazem Alavipanah Quazi K.Hassan Yoann Malbéteau si-Bo Duan Department of Remote Sensing and GIS University of TehranTehranIran Geomatics Engineering Schulich School of EngineeringUniversity of CalgaryCalgaryCanada Center for Remote Sensing Applications Mohammed VI Polytechnic University (UM6P)Ben GuerirMorocco Key Laboratory of Agricultural Remote Sensing Ministry of Agriculture/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijingPeople’s Republic of China

The normalization of LST relative to environmental parameters is of great importance in various environmental applications. The purpose of this study was to develop a new approach for LST normalization relative to environmental variables. These included topographic variables (i.e. solar irradiance and near-surface temperature lapse rate (NSTLR)) as well as biophysical properties (i.e. vegetation,wetness,and albedo). The study was conducted in two phases,namely (1) using global and (2) local optimization strategies to calculate the regression coefficients of environmental variables in the partial least squares regression (PLSR) and build the non-linear linking model in the random forest regression (RFR). The RMSEs between actual LST and modeled LST based on the global and local optimization strategies using PLSR (RFR) were 2.202 (0.935) and 0.939 (0.835) °C,respectively. The results showed that RFR had higher efficiency than PLSR in normalizing LST. Moreover,the local optimization method outperformed the global optimization method in terms of normalization accuracy. The results of this study could be very useful in many environmental applications such as identifying thermal anomalies,and surface anthropogenic heat island modeling.

关键词： Normalization land surface temperature environmental variables partial least squares random forest local strategy

A Potential Anti-cancer Compound Separated from the Chloroform Extract of the Chinese Medicine Formula Shenqi San

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Current Medical Science 2020年第1期40卷 138-144页

作者： Lu SHI Yi-jun TU si-qi YE Yu XIA Chao-zhi MA Xiao-zhi PENG Yan-wen LIU Zhong-zhu AI Peng-tao YOU Department of Pharmacy Medical CollegeJianghan UniversityWuhan 430056China Hubei Key Laboratory of Resources and Chemistry of Chinese Medicine Hubei University of Chinese MedicineWuhan 430065China Department of Dermatology The Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510220China

This study examined anti-cancer compounds present in the chloroform extract of the Chinese medicine formula Shenqi San(CE-SS).silica gel column chromatography,Sephadex LH-20,octadecylsilyl(ODS)column chromatography,and high performance liquid chromatography(HPLC)were used to separate the compounds from *** structural formulas of the separated compounds were determined using ID1H and 13C experiments as well as high resolution electrospray ionization mass spectroscopy(HREsiMS).The corresponding results were compared with the reported literature data.A total of six compounds were separated and their structures were identified on the basis of corresponding spectroscopic and physico-chemical *** were Saikogenin F(Ⅰ),Prosaikogenin D(Ⅱ),Prosaikogenin F(Ⅲ),p-sitosterol(Ⅳ),3β,16β,23-trihydroxy-13,28-epoxyurs-11-ene-3-O-β-D-glucopyranoside(V),and methyl ursolic acid(vi).The separated compounds were evaluated in vitro for their inhibitory ability against the proliferation of A549 cells via MTT *** was investigated using Annexin V-FITC/propidium iodide(PI)by flow ***-associated proteins were examined by Western *** the compounds were observed to have inhibitory activities against the proliferation of A549 cells to different *** cytometry showed that compound V increased the proportion of apoptotic A549 cells in a dose-dependent *** blotting showed that compound V increased the expression of Bax,cleaved-caspase-3,cleaved-caspase-9 and cleaved-poly ADP-ribose polymerase(PARP),and decreased the expression of *** results indicated that compound V featured a significant inhibitory effect on A549 cells when compared with other compounds,and it may be considered a potential drug against cancers.

关键词： Shenqi San separation identification A549 apoptosis

Immediate Effect of Electro-acupuncture on Endometrial Blood Flow in Patients with Recurrent Implantation Failure:A Randomized Controlled Trial

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Chinese Journal of Integrative Medicine 2024年第4期30卷 291-298页

作者： LAI Yuan-yuan LIU Li-ying WU Yong-na HUANG Lei ZHENG Xiao-yan GAN Di YU si-yi ZHONG Ying LIANG Fan-rong ZHOU Ying YANG Jie Acupuncture and Tuina School Chengdu University of Traditional Chinese MedicineChengdu(610032)China sichuan Jinxin Xi'nan Women's and Children's Hospital Chengdu(610032)China Yuan TCM Wellness Pte.Ltd.(999002) Pulse TCM SingaporeSingapore

Objective To investigate the immediate effects of electro-acupuncture(EA)on endometrial blood flow among recurrent implantation failure(RIF)*** Eighty RIF patients,enrolled from March 2022 to December 2022,were randomly allocated into either the EA group(40 cases)or the waiting-list(WL)group(40 cases)by using a random number *** EA group underwent acupuncture at points of Shenting(GV 24),Baihui(GV 4),Benshen(GB 13),bilateral Zigong(EX-CA 1),Huangshu(KI 16),Sanyinjiao(SP 6)and Xuehai(SP10),and electric acupuncture apparatus was connected to EX-CA 1,KI 16,SP 6,and SP 10 with disperse-dense waves at 4/20 Hz frequencies for 30 min after transvaginal ultrasound,while the WL group received no *** primary outcome measured was the endometrial volume blood *** secondary outcomes included the bilateral uterine artery index,endometrial volume,endometrial blood flow type,vascular distribution index(vi^(MV))for endometrial and ovary,clinical pregnancy rate,and embryo implantation *** In the EA group,there was a notable decrease in the bilateral pulsatility index and a significant improvement in the endometrial blood flow type post-EA(Pvi^(MV) for the endometrium and right ovary were markedly higher in the EA group compared to the WL group post-treatment(Psignificant disparities were observed in vascular index,flow index,vascular blood flow index,uterine arterial blood flow indices,endometrial volume,clinical pregnancy rate and embryo implantation rate between the two groups after treatment(P>0.05).Besides,no adverse events related to EA were *** EA can promptly ameliorate vi^(MV) for the endometrial and right ovary,and endometrial blood flow *** randomized controlled trials are warranted to investigate the long-term effects of EA on blood flow of RIF patients and its implications for pregnancy outcomes.(Trial registration ***2200057377

关键词： electro-acupuncture recurrent implantation failure transvaginal ultrasound endometrial receptivityanalysis randomized controlledtrial

CT-based radiomics to predict development of macrovascular invasion in hepatocellular carcinoma:A multicenter study

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Hepatobiliary & Pancreatic Diseases International 2022年第4期21卷 325-333页

作者： Jing-Wei Wei si-Rui Fu Jie Zhang Dong-Sheng Gu Xiao-Qun Li Xu-Dong Cheng Shuai-Tong Zhang Xiao-Fei He Jian-Feng Yan Li-Gong Lu Jie Tian Key Laboratory of Molecular Imaging Institute of AutomationChinese Academy of SciencesBeijing 100190China Beijing Key Laboratory of Molecular Imaging Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China Zhuhai Interventional Medical Center Zhuhai Precision Medical CenterZhuhai People’s HospitalZhuhai Hospital of Jinan UniversityZhuhai 519000China Department of Radiology Zhuhai Precision Medical CenterZhuhai People’s HospitalZhuhai Hospital of Jinan UniversityZhuhai 519000China Department of Interventional Treatment Zhongshan City People’s HospitalZhongshan 528400China Department of Radiology Shenzhen People’s HospitalShenzhen 518000China Interventional Diagnosis and Treatment Department Nanfang HospitalSouthern Medical UniversityGuangzhou510000China Department of Radiology Yangjiang People’s HospitalYangjiang 529500China Beijing Advanced Innovation Center for Big Data-Based Precision Medicine School of Medicine and EngineeringBeihang UniversityBeijing 100191China Engineering Research Center of Molecular and Neuro Imaging of Ministry of Education School of Life Science and TechnologyXidian UniversityXi’an 710126China

Background:Macrovascular invasion(Mavi)occurs in nearly half of hepatocellular carcinoma(HCC)patients at diagnosis or during follow-up,which causes severe disease deterioration,and limits the possibility of surgical *** study aimed to investigate whether computed tomography(CT)-based radiomics analysis could help predict development of Mavi in ***:A cohort of 226 patients diagnosed with HCC was enrolled from 5 hospitals with complete Mavi and prognosis ***-based radiomics signature was built via multi-strategy machine learning ***,Mavi-related clinical factors and radiomics signature were integrated to construct the final prediction model(CRIM,clinical-radiomics integrated model)via random forest ***-regression analysis was used to select independent risk factors to predict the time of Mavi ***-Meier analysis was conducted to stratify patients according to the time of Mavi development,progression-free survival(PFS),and overall survival(OS)based on the selected risk ***:The radiomics signature showed significant improvement for Mavi prediction compared with conventional clinical/radiological predictors(Pvi with satisfactory areas under the curve(AUC)of 0.986 and 0.979 in the training(n=154)and external validation(n=72)datasets,*** presented with excellent generalization with AUC of 0.956,1.000,and 1.000 in each external cohort that accepted disparate CT scanning protocol/***9_fos_InterquartileRange[hazard ratio(HR)=1.98;Psion model successfully stratified patients into the high-risk and low-risk groups regarding the time of Mavi development(Psions:The CT-based quantitative radiomics analysis could enable high accuracy prediction of subsequent Mavi development in HCC with prognostic implications.

关键词： Hepatocellular carcinoma Macrovascular invasion Radiomics Computed tomography Prognosis

The synergic extraction of uranium(Ⅵ) with tri-n-butyl phosphate (TBP) and petroleum sulfoxides(PSO)/benzene

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Nuclear Science and Techniques 2001年第4期12卷 270-275页

作者： DONG yan, YANG Yan-Zhao, FAN Wei-Liu, SUN si-Xiu (Department of Chemistry, Shandong University, Jinan 250100) Chemistry 山东大学化学系山东济南 250100

The synergistic extraction of uranium (vi) from nitric acid aqueous solution with a mixture of tri-n-butyl phosphate (TBP) and petroleum sulfoxides(PSO) in benzene was studied. It has been found that the maximum synergistic extraction effect occurs where the molar ratio of PSO to TBP is one to two. The composition of the complex of synergistic extraction is UO2(NO3)***. The formation constant of the complex KTp=57.44.

关键词：铀(vi) 协同提取石油亚砜提取

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虚拟伽玛能谱仪的设计与测试

自动化与仪表 2011年第2期26卷 17-19,32页

作者：蔡思静福建工程学院电子信息与电气工程系福州350108

基于LabviEW开发平台,完成虚拟伽玛能谱仪系统开发。采用虚拟仪器法技术,突破传统模式,完成了道脉冲幅度分析、谱分析一体化的硬件设计。讨论了该系统的软件设计过程,详述了缓存多任务运行机制和多道脉冲幅度分析技术的应用,并通过仪器... 详细信息

基于LabviEW开发平台,完成虚拟伽玛能谱仪系统开发。采用虚拟仪器法技术,突破传统模式,完成了道脉冲幅度分析、谱分析一体化的硬件设计。讨论了该系统的软件设计过程,详述了缓存多任务运行机制和多道脉冲幅度分析技术的应用,并通过仪器性能测试分析,充分论证了仪器仪表设计计算机化的可行性。

关键词：伽玛能谱仪虚拟仪器法多道脉冲幅度分析