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Vasal vessels preserving microsurgical vasoepididymostomy in cases of previous varicocelectomy： a case report and literature review

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Asian Journal of Andrology 2016年第1期18卷 154-156页

作者： Yan Zhang xiao Wu xiao-jian yang Hao Zhang Bin Zhang Department of Infertility and Sexual Medicine The Third Affiliated Hospital Sun Yat-sen University Guangzhou 510630 China

Dear Editor, Vasoepididymostomy plays an important role in treating epididymal obstructive azoospermia and this procedure is becoming more popular in the developing countries Hcwever, we believe its effectiveness and safety should also be considered. Varicocelectomy is very common in treating male infertility due to palpable varicocele and decreased semen quality, as well as reduzing testicular pain？ Therefore the question remains is whether simultaneous/asynchronous microsurgery of vasoepididymostomy and vai icocele ligation safe？

关键词： @@

The Existence of (v,4,1) Disjoint Difference Families with a Prime Power

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Acta Mathematicae Applicatae Sinica 2008年第4期24卷 643-648页

作者： Dian-hua Wu jian-xiao yang Bi-chang Huang Department of Mathematics Guangxi Normal University Guilin 541004 China

A （v, k, λ） difference family （（v, k, λ）-DF in short） over an abelian group G of order v, is a collection F=（Bi｜i ∈ I} of k-subsets of G, called base blocks, such that any nonzero element of G can be represented in precisely A ways as a difference of two elements lying in some base blocks in F. A （v, k, λ）-DDF is a difference family with disjoint blocks. In this paper, by using Weil＇s theorem on character sum estimates, it is proved that there exists a （p^n, 4, 1）-DDF, where p = 1 （rood 12） is a prime number and n ≥1.

关键词： Difference family disjoint difference family optimal optical orthogonal codes character sum

Nanopore design of sulfur doped hollow carbon nanospheres for superior potassium-ion battery anodes

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Rare Metals 2024年第5期43卷 2103-2114页

作者： Zhen-Dong Liu Hui-Yan Feng Yu-Chen Wang Fei Wang Yue Liu jian-xiao yang Yue Gu Jun Tan Chong Ye Cheng-Zhi Zhang Ji Hua Laboratory Foshan 528000China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology College of Materials Science and EngineeringHunan UniversityChangsha 410082China

Sulfur doped carbonaceous materials are promising anodes for potassium-ion batteries because of their ability to bridge active sites and induce C/S electron coupling,resulting in increased ion storage capacitance However,the large potassium ions could cause significant volume expansion and structure collapse during operation in sulfur doped carbonaceous anodes,which lead to rapidly capacity sacrifice during long-term *** design for anchoring sulfur atom in carbon skeleton is a novel way to alleviate the structure collapse and maintain the cycling ***,this study developed a controlled nanopore and sulfur doped carbon sphere structure(S-NPHCSs).In potassium-ion batteries S-NPHCSs anode demonstrated exceptional performance with a high reversible capacity of 247 mAh·g^(–1)after 50 cycles at 0.2 A·g^(–1)and delivered a long cycle stability of 600 cycles at a high current density of 1.0 A·g^(–1).Interconnected nanopores and doped sulfur structure not only expand the accumulation space and offer ample active sites for diffusion and adsorption of potassium ions,but also build stable channels through nanopore structure to ensure the cyclic *** finding provides a fundamental theory for designing nanopore structures and introducing sulfur doped carbonaceous materials to enhance capacitive potassium storage and long cycle stability.

关键词： Nanopore Carbon materials Sulfur doping Anode Potassium-ionbatteries

Consecutive nightly measurements are needed for accurate evaluation of nocturnal erectile capacity when the first-night laboratory recording is abnormal

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Asian Journal of Andrology 2020年第1期22卷 94-99页

作者： Zi-Jun Zou Shi-Tao Chen Gong-Chao Ma Yu-Fen Lai xiao-jian yang Jia-Rong Feng Zhi-Jun Zang Tao Qi Bo Wang Lei Ye Yan Zhang Department of Infertility and Sexual Medicine The Third Affiliated HospitalSun Yat-sen UniversityGuangzhou 510630China

Multiple measurements of nocturnal penile tumescence and rigidity(NPTR)are widely accepted as a method to differentiate psychogenic erectile dysfunction(ED)from organic ***,direct evidence remains limited regarding the first-night effect on NPTR measurement using the ***,we evaluated the first-night effect on the results of NPTR measurement to validate the necessity of NPTR measurement for two consecutive nights,particularly when abnormal first-night measurements are recorded in a laboratory *** retrospectively reviewed 105 patients with a complaint of ED,who underwent NPTR measurement using the RigiScan in the Department of Infertility and Sexual Medicine,the Third Affiliated Hospital of Sun Yat-sen University(Guangzhou,China),for two consecutive nights,during the period from November 2015 to May *** parameters were collected and *** found that more effective nocturnal erections were detected during the second night than during the first night(P<0.001).Twenty percent of all patients had no effective erection during the first night,but exhibited at least one effective erection during the second *** negative predictive value of NPTR measurement during the first night was 43.2%;this was significantly lower than that on the second night(84.2%;P=0.003).Most NPTR parameters were better on the second night than on the first *** first-night effect might be greater among patients younger than 40 years of *** conclusion,two consecutive nightly measurements of NPTR can avoid a false-abnormal result caused by the first-night effect;moreover,these measurements more accurately reflect erectile capacity,especially when the first-night record is abnormal in a laboratory setting.

关键词： erectile dysfunction nocturnal penile tumescence and rigidity penis RigiScan

Loupe-assisted versus microscopic varicocelectomy： s there an intraoperative anatomic difference？

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Asian Journal of Andrology 2014年第1期16卷 112-114页

作者： Hao Zhang xiao-Peng Liu xiao-jian yang Wen-Tao Huang Xing-Xing Ruan Heng-Jun xiao Liao-Yuan Li Xin Gao Yan Zhang Department of Urology The Third Affiliated Hospital of Sun Yat-sen University Guangzhou China

The aim of this study was to compare the intraoperative difference in anatomic details between Ioupe-assisted and microscopic varicocelectomy within the same spermatic cord. Between April 2011 and August 2011, 26 men with 33 sides containing grade 2-3 varicocele were enrolled in this study. First, one surgeon performed the open inguinal varicocelectomy under x 3.5 Ioupe magnification. The presumed vascular channels and lymphatics were isolated and marked without ligation. Another surgeon then microsurgically dissected and checked the same spermatic cord using an operating microscope to judge the results in terms of the ligation of the internal spermatic veins and the preservation of the arteries and lymphatics. There were significant differences in the average number of internal spermatic arteries （1.51 vs 0.97）, internal spermatic veins （5.70 vs 4.39） and lymphatics （3.52 vs 1.61） between the microscope and Ioupe-assisted procedures （P 〈 0.001, P 〈 0.001, P 〈 0.001, respectively）. Meanwhile, in varicocele repair with Ioupe magnification, an average of 1.30 β± 1.07 （43/33） internal spermatic veins per side were missed, among the overlooked veins, 1.12 ± 0.93 （37/33） were adhered to the preserved testicular artery, as well as 0.55 ± 0.79 lymphatics and 0.36 ± 0.55 arteries that were to be ligated. In conclusion, microscopic varicocelectomy could preserve more internal spermatic arteries and lymphatics and could ligate more veins than the Ioupe-assisted procedure. To some degree, Ioupe magnification is inadequate for the reliable identification and dissection of the tiny vessels of the spermatic cord, as most of the overlooked veins were adhered to the preserved testicular artery.

关键词： intraoperative difference Ioupe-assisted microscopic varicocelectomy

Monthly Monetary Planning for China via Applying Method of Constructing Objective Function

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Journal of Systems Science and Systems Engineering 2001年第4期13卷 385-391页

作者： ZENG jian-hua, yang xiao-guang, XU Shan-ying Institute of Systems Science, Academy of Mathematics and System Sciences, Chinese Academy of Sciences, Beijing 100080, China Institute of Systems Science Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China

Many economic problems can be formulated as optimization problems. Econometricians have long devoted their efforts to construct the econometric equation systems, while the corresponding objective functions receive few attentions. In recent twenty years, some techniques to construct the objective functions with economic implications have been developed, which might have a potential in economic decision-making. In the paper we app1y the method of constructing objective function to design an optimization model for monthly monetary planning of China. The real monthly data from l991 to l999 are used to evaluate the monthly economic situation. Our empirical experiment shows that the model gives a good short-term forecasting.

关键词： constructing objective function monetary planning optimization mode1

Pneumomediastinum Secondary to Foreign Body Aspiration： Clinical Features and Treatment Explorement in 39 Pediatric Patients

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Chinese Medical Journal 2016年第22期129卷 2691-2696页

作者： xiao-jian yang Jie Zhang Ping Chu Yong-Li Guo Jun Tai Ya-Mei Zhang Li-Xing Tang Xin Ni Department of Otolaryngology-Head and Neck Surgery Beijing Children's Hospital Capital Medical University Beijing 100045 China Beijing Key Laboratory for Pediatric Diseases of Otolaryngology-Head and Neck Surgery Beijing Pediatric Research Institute Capital Medical University Beijing 100020 China

Background：Pneumomediastinum （PM） secondary to foreign body aspiration （FBA） is rare in *** it is mainly benign,some cases may be *** to the rare nature of this clinical entity,proper assessment and management have been poorly studied so ***,we characterized the presentation and management of this clinical entity and provided an evaluation system for the ***：We retrospectively reviewed children with PM secondary to FBA,who were treated in Beijing Children＇s Hospital from January 2010 to December *** patients were stratified according to the degree of dyspnea on admission,and interventions were given *** removals of airway foreign bodies （FBs） were performed on all *** patients in acute respiratory distress,emergent air evacuation and/or resuscitations were performed *** data,interventions,and clinical outcomes were ***：A total of 39 patients were included in this *** clinical severity was divided into three grades （Grades Ⅰ,Ⅱ,and Ⅲ） according to the degree of ***-one patients were in Grade Ⅰ dyspnea,and they simply underwent bronchoscopic FBs *** resolved spontaneously and all patients recovered *** patients were in Grade Ⅱ dyspnea,and emergent drainage preceded rigid *** all recovered uneventfully under close *** exhausted patients were in Grade Ⅲ *** died from large PM and bilateral pneumothorax,respectively,despite of aggressive interventions in our ***：PM secondary to FBA could be life-threatening in some *** degree of dyspnea should be evaluated immediately,and patients in different dyspnea should be treated *** patients in Grade Ⅰ dyspnea,simple bronchoscopic FBs removals could promise a good *** patients in Grade Ⅱ dyspnea,emergent air evacuation and/or resuscitation should precede a bronchoscopy before the children become exhausted.

关键词： Children Foreign Body Aspiration Pneumomediastinum Pneumothorax Subcutaneous Emphysema

基于逼近阶跃函数和拉格朗日插值的改进DDA方法

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岩土力学 2017年第7期38卷 2103-2112页

作者：赵健肖明杨阳陈俊涛李冬冬武汉大学水资源与水电工程科学国家重点实验室湖北武汉430072 长江勘测规划设计研究有限责任公司湖北武汉430010

针对非连续变形分析中开合迭代难以收敛的难题,基于块体接触约束状态和块体位移之间的关系,提出了基于逼近阶跃函数和拉格朗日插值的改进DDA方法。采用双曲正切函数来逼近阶跃函数,利用阶跃函数将块体接触约束状态用块体位移来表达,以... 详细信息

针对非连续变形分析中开合迭代难以收敛的难题,基于块体接触约束状态和块体位移之间的关系,提出了基于逼近阶跃函数和拉格朗日插值的改进DDA方法。采用双曲正切函数来逼近阶跃函数,利用阶跃函数将块体接触约束状态用块体位移来表达,以此来替代开合迭代,避免了开合迭代难以收敛的难题。利用拉格朗日插值原理,推导得到只含有块体位移为未知量的块体系统势能函数,并利用变尺度法来求解总体势能函数的极值以得到块体位移。分别结合滑块模型和地下洞室模型,分析了改进DDA方法的计算精度和计算速度,验证了文中提出的改进DDA方法的正确性和稳定性。研究表明:基于逼近阶跃函数和拉格朗日插值的改进DDA方法具有较高的精度,且相比较传统DDA方法而言,具有更为稳定的和更为强健的计算收敛性。因此,基于逼近阶跃函数和拉格朗日插值的改进DDA方法是一种稳定有效的数值计算方法,为解决非连续变形中开合迭代难以收敛的问题提供了新思路。

关键词：开合迭代接触约束块体位移势能函数变尺度法

Clinicopathological differences between patients with schistosomal appendicitis and non schistosomal appendicitis:A retrospectively study of past ten years

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World Journal of Clinical Cases 2025年第2期13卷 24-32页

作者： xiao-Yi Wang Yao Hao Zi-jian Wang Xiu-Liang Xu jiang-Hua yang Department of Infectious Diseases The First Affiliated of Wannan Medical CollegeWuhu 241001Anhui ProvinceChina

BACKGROUND Chronic schistosomiasis causes multiple organ and multiple system diseases,especially the digestive *** eggs are mainly deposited in the stomach,liver and colorectal,but a few eggs are deposited in the appendix and cause *** present,there are few studies on schistosomal *** To explore the differences in epidemiological,clinical and pathological characteristics between schistosomal appendicitis and non-schistosomal appendicitis over the past decade in order to assess the impact of schistosomiasis on *** The differences of general data,clinical data and laboratory examination data of patients with appendicitis from October 2013 to October 2023 were retrospectively *** patients were divided into two groups for *** were 136 patients in schistosomal appendicitis group and 5418 patients in non-schistosomal appendicitis *** Schistosomal appendicitis accounted for 2.45%of all patients with appendicitis,and the annual proportion in the past decade was 2.2%,2.9%,1.8%,1.9%,3.4%,3.1%,1.9%,1.6%,3%,2.6%,*** prevalence of schistosomal appendicitis was middle-aged and elderly males,with an average age of 61.73±15.335 *** main population of non-schistosomal appendicitis was middle-aged men,with an average age of 35.8±24.013 years(P<0.001).The distribution of pathological types of appendicitis was different between the two groups(P<0.001).The incidence of acute suppurative appendicitis in non-schistosomal appendicitis was higher than that in schistosomal appendicitis[odds ratio(OR)=0.504;95%confidence interval(CI):0.349-0.728;P<0.001].The proportion of acute attack of chronic appendicitis in schistosomal appendicitis was higher than that in non-schistosomal appendicitis(OR=2.614;95%CI:1.815-3.763;P<0.001).The proportion of schistosomal appendicitis patients complicated with colorectal cancer was higher than that of nonschistosomal appendicitis patients(OR=5.087;95%CI:1.427-

关键词： Schistosomal appendicitis Schistosomiasis Appendix Colorectal cancer Clinicopathological characteristics