检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

机械设备波动状态预测模型的关键参数识别

计算机仿真 2020年第11期37卷 371-374,464页

作者：黄川武汉轻工大学湖北武汉430023

由于波动状态关键参数识别过程复杂度较高,现有识别方法存在缺少参数灵敏度特征,提出一种基于粒子群游算法的关键参数识别方法。分析波动状态预测模型变量,利用CVA状态估计获取波动转变趋势,构建多个参数与模型状态的近似映射关联,通过... 详细信息

由于波动状态关键参数识别过程复杂度较高,现有识别方法存在缺少参数灵敏度特征,提出一种基于粒子群游算法的关键参数识别方法。分析波动状态预测模型变量,利用CVA状态估计获取波动转变趋势,构建多个参数与模型状态的近似映射关联,通过计算参数灵敏度方法对参数与模型状态的近似映射关联归一化处理,采用粒子群游算法将优化问题的各个解当作一个粒子,通过贴合度函数权衡各个粒子解优越性,实现机械设备波动状态预测模型关键参数识别。仿真结果证明,所提方法识别精度与效率较高,具有实际应用价值。

关键词：机械设备波动状态参数识别参数灵敏度

服装、身体与自我——论《觉醒》中的女性服装哲学

在线全文

学校读者我要写书评

暂无评论

解放军外国语学院学报 2007年第1期30卷 95-98页

作者：黄川解放军外国语学院研究生系河南洛阳471003

作为一本现代女性的独立宣言,《觉醒》表达的女性主义思想在服装、身体与自我这三者的关系中得以体现。维多利亚时代的传统女性服装不仅是男性目光的聚焦点,也是束缚女性性意识的工具。小说中的两位“新女性”——瑞兹小姐和艾德娜——... 详细信息

作为一本现代女性的独立宣言,《觉醒》表达的女性主义思想在服装、身体与自我这三者的关系中得以体现。维多利亚时代的传统女性服装不仅是男性目光的聚焦点,也是束缚女性性意识的工具。小说中的两位“新女性”——瑞兹小姐和艾德娜——都在一定程度上摆脱了女性服装的束缚,或对女性服装重新定义,或对身体进行自我欣赏,在这一过程中其女性主体意识得以实现,自我观念得以确立,从而实现了女性意识的觉醒。

关键词：服装哲学女性意识觉醒

Clinical benefits of a modified Cryopiece system for cryopreservation of rare ejaculated and testicular spermatozoa for ICSI

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2022年第5期24卷 533-539页

作者： Wei Chen chuan huang Peng Li Feng Liu Jian Sun Zi-Jue Zhu Jing Zhai Yuan Xu Yan Hong Jian-Lin Hu Yun-Peng Peng Zhen-Bo Zhang Yu Wu Zheng Li Department of ART Department of AndrologyCenter for Men’s HealthInstitute of Urologic Medical CenterShanghai General HospitalShanghai Key Lab of Reproductive MedicineShanghai Jiao Tong UniversityShanghai 200080China Clinical Research Center for Reproduction and Genetics in Hunan Province Reproductive and Genetic Hospital of CITIC-XiangyaChangsha 410000China Department of Urology Affiliated Hospital of Xuzhou Medical UniversityXuzhou 221000China

Cryopreservation of rare testicular-retrieved spermatozoa for intracytoplasmic sperm injection(ICSI)in patients with severe oligozoospermia and azoospermia remains a major challenge in clinical *** study evaluated the Cryopiece system as a potential technique to cryopreserve rare human spermatozoa for *** numbers of ejaculated(24 patients)and testicular(13 patients)spermatozoa were cryopreserved using the Cryopiece *** total number of recovered spermatozoa and motility were assessed after ***-seven couples underwent ICSI using spermatozoa cryopreserved by the Cryopiece system,and ICSI outcomes(rates of fertilization,embryo cleavage,and clinical pregnancy)were *** average sperm post-thaw retrieval rate was 79.1%,and motility was 29.7%.Ejaculated spermatozoa had a higher post-thaw motility(32.5%)than testicular spermatozoa(21.8%;P=0.005).ICSI achieved a fertilization rate of 61.9%,embryo cleavage rate of 84.6%,and clinical pregnancy rate of 43.3%.The ICSI outcomes in the ejaculated and testicular frozen-thawed spermatozoa were *** oocyte activation(AOA)after ICSI with motile(72.1%)or immotile(71.9%)spermatozoa resulted in a significantly higher fertilization rate than that when using motile spermatozoa without AOA(52.0%;P=0.005).However,AOA did not enhance the clinical pregnancy rate(55.6%or 40.0%vs 35.3%;P=0.703).The Cryopiece system is simple and useful for the cryopreservation of small numbers of ejaculated or testicular spermatozoa for ICSI in patients with severe oligozoospermia or nonobstructive azoospermia.

关键词： Cryopiece system intracytoplasmic sperm injection outcome rare sperm cryopreservation

Early and delayed castrations confer a similar survival advantage in TRAMP mice

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2009年第3期11卷 291-297页

作者： Zai-Xian Zhang Qing-Quan Xu Xiao-Bo huang Ji-chuan Zhu Xiao-Feng Wang Department of Urology Peking University People＇s Hospital Beijing 100044 China

The most appropriate time to introduce androgen deprivation therapy for prostate cancer remains controversial. Our aim was to evaluate the effects of early versus delayed surgical castration on prostate cancer progression and survival in the transgenic adenocarcinoma of the mouse prostate （TRAMP） model. TRAMP mice were randomly divided into three groups： the early castration group （on which castration was performed at the age of 4 weeks）, the delayed castration group （on which castration was performed when abdominal tumours could be palpated）, and the sham-castrated group. Mice were monitored daily throughout their lives until cancer-related death or the develop- ment of an obviously moribund appearance, at which time the individual mouse was killed. Androgen receptor expression in prostate tumours was also evaluated. The results shows that the average lifespan in early castration, delayed castration and sham-castrated groups were 54.1 weeks, 59.9 weeks and 39.1 weeks, respectively. Both early castration and delayed castration conferred a statistically significant survival advantage when compared with the sham-castrated group （P 〈 0.001）. However, the difference in lifespan between the early castration group and the delayed castration group was not statistically significant （P = 0.85）. The increase in lifespan in the TRAMP mice that received either early or delayed castration correlated with lower G/B value （genitourinary tract weight/body weight） at death than the sham-castrated mice. In conclusion, early and delayed castrations in TRAMP mice pro- longed survival to a similar extent. This finding may provide a guide for clinical practice in prostate cancer therapy.

关键词： castration prostate cancer survival TRAMP

Effects of fluid balance on prognosis of acute respiratory distress syndrome patients secondary to sepsis

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Emergency Medicine 2020年第4期11卷 216-222页

作者： Yu-ming Wang Yan-jun Zheng Ying Chen Yun-chuan huang Wei-wei Chen Ran Ji Li-li Xu Zhi-tao Yang Hui-qiu Sheng Hong-ping Qu En-qiang Mao Er-zhen Chen Department of Emergency Ruijin Hospital Affi liated to Shanghai Jiao Tong University School of MedicineShanghaiChina Department of Critical Care Medicine Ruijin Hospital Affi liated to Shanghai Jiao Tong University School of MedicineShanghaiChina

BACKGROUND:Fluid management is crucial to acute respiratory distress syndrome(ARDS)secondary to ***,choices of fluid resuscitation strategies and fluid input volumes remain a thorny *** study aimed to elucidate the relationship between fluid balance and prognosis of ARDS patients secondary to ***:Our study included 322 sepsis patients from Ruijin Hospital between 2014 and 2018,and 84 patients were diagnosed as ARDS within 72 hours after onset of sepsis according to Berlin ARDS Defi ***:Among the 322 sepsis patients,84(26.1%)were complicated with ARDS within 72 *** patients had a lower oxygenation index(PaO2/FiO2166.4±71.0 vs.255.0±91.2,P<0.05),longer duration of mechanical ventilation(11[6-24]days vs.0[0-0]days,P<0.05)than those without *** patients with ARDS showed daily positive net fl uid balance during seven days compared with those without ARDS who showed daily negative net fluid balance since the second day with signifi cant statistical *** the 84 sepsis patients with ARDS,58(69.0%)*** daily fl uid input volumes were much lower in survivors than in non-survivors(43.2±16.7 mL/kg vs.51.0±25.2 mL/kg,P<0.05)while output volumes were much higher in survivors(45.2±19.8 mL/kg vs.40.2±22.7 mL/kg,P<0.05).Using binary logistic regression analysis,we found that the mean daily fl uid balance was independently associated with mortality of sepsis patients complicating with ARDS(P<0.05).CONCLUSIONS:Early negative fluid balance is independently associated with a better prognosis of sepsis patients complicated with ARDS.

关键词： Sepsis Acute respiratory distress syndrome Fluid balance Prognosis

偶件表面粗糙度对回转支承隔离体使用性能的影响

在线全文

学校读者我要写书评

暂无评论

表面技术 2020年第9期49卷 244-251页

作者：黄传辉刘磊张宁徐州工程学院机电工程学院江苏徐州221018

目的掌握偶件表面粗糙度对回转支承隔离体使用性能的影响规律。方法利用M-2000实验机考察了在2号锂基润滑脂和20^#机油润滑条件下,轴承GCr15滚动体表面粗糙度对PA1010、HPb59-1等隔离体使用性能的影响,分析了载荷、速度以及偶件表面粗... 详细信息

目的掌握偶件表面粗糙度对回转支承隔离体使用性能的影响规律。方法利用M-2000实验机考察了在2号锂基润滑脂和20^#机油润滑条件下,轴承GCr15滚动体表面粗糙度对PA1010、HPb59-1等隔离体使用性能的影响,分析了载荷、速度以及偶件表面粗糙度对摩擦系数、磨损量的影响规律,并观察了磨损表面的微观形貌,探讨了PA1010、HPb59-1等隔离体的损伤机制。结果随GCr15钢环表面粗糙度增加,摩擦系数、磨损量均呈上升趋势,PA1010摩擦学性能受偶件表面粗糙度的影响程度显著高于HPb59-1。表面粗糙度值相同时,随实验载荷增加,摩擦系数略有降低,但变化不大,磨损量随实验载荷的增加而增长较快。200、400、600 N三种载荷下,PA1010磨损量的平均比值为1∶1.64∶2.44,HPb59-1磨损量的平均比值为1∶2.92∶3.74。20#机油润滑时的摩擦系数低于2号锂基润滑脂润滑,对PA1010而言,平均降低了52.7%左右,对HPb59-1,平均降低了41.8%左右。结论GCr15偶件表面粗糙度增加引起摩擦系数、磨损量上升,且对PA1010影响更大。润滑剂对磨损量的影响和GCr15钢环表面粗糙度密切相关,表面粗糙度值小时,影响甚微;随着表面粗糙度值增大,润滑剂所产生的影响越来越明显。PA1010、HPb59-1磨损表面均呈现出磨料磨损特征。研究结果为回转支承的设计提供了实验和理论参考依据。

关键词：回转支承隔离体表面粗糙度摩擦磨损锂基润滑脂机油润滑

提高单回链式电网及有源终端变供电可靠性的一种方法

在线全文

学校读者我要写书评

暂无评论

电力系统保护与控制 2009年第23期37卷 122-123,127页

作者：张建三明电业局福建三明365000

单回链式电网及有源终端变供电系统由于其接线特点可靠性低,但是如今依然在许多经济不发达地区被广泛应用。提出一种通过改进线路保护装置中重合闸功能的方法来提高该类型电网的供电可靠性。该方法对提高无人值守变电站的事故处理效率... 详细信息

单回链式电网及有源终端变供电系统由于其接线特点可靠性低,但是如今依然在许多经济不发达地区被广泛应用。提出一种通过改进线路保护装置中重合闸功能的方法来提高该类型电网的供电可靠性。该方法对提高无人值守变电站的事故处理效率也有极大的帮助。此方法已经在三明地区投入运行,效果良好。供调度运行及保护整定人员参考。

关键词：链式电网重合闸可靠性整定

同方期刊数据库

重金属污染土壤的草酸和EDTA混合淋洗研究

在线全文

学校读者我要写书评

暂无评论

环境工程学报 2014年第8期8卷 3480-3486页

作者：黄川李柳黄珊宋雪重庆大学资源及环境科学学院重庆400044 重庆大学煤矿灾害动力学与控制国家重点实验室重庆400044 重庆地质矿产研究院重庆400044

采用不同浓度的草酸(oxalic acid,OX)和乙二胺四乙酸(EDTA)混合的淋洗方法研究重金属污染土壤的最佳混合淋洗方式,探讨了液固比、淋洗时间及pH对淋洗效果的影响,并分析了0.2 mol/L OX+0.2 mol/L EDTA处理前后土壤中重金属形态的变化。... 详细信息

采用不同浓度的草酸(oxalic acid,OX)和乙二胺四乙酸(EDTA)混合的淋洗方法研究重金属污染土壤的最佳混合淋洗方式,探讨了液固比、淋洗时间及pH对淋洗效果的影响,并分析了0.2 mol/L OX+0.2 mol/L EDTA处理前后土壤中重金属形态的变化。结果表明,采用0.2 mol/L OX+0.2 mol/L EDTA混合的淋洗法可同时去除多种重金属,且对Cu、Zn、Ni和Cr的去除率明显高于单用OX和EDTA,去除率分别为Cu 41.29%、Zn 84.73%、Ni 54.2%和Cr 66.01%。0.2mol/L OX+0.2 mol/L EDTA在液固比为5∶1、淋洗时间为4 h、pH为6时可分别达到最佳淋洗效果,且分别为Cu 62.59%、Zn 93.48%、Ni 55.95%和Cr 71.57%;Cu 50.47%、Zn 86.67%、Ni 61.53%和Cr 72.68%;Cu 44.40%、Zn 81.82%、Ni68.76%和Cr 74.93%。形态分析结果表明,0.2 mol/L OX+0.2 mol/L EDTA能较好地改变土壤中重金属形态的分布。

关键词：重金属污染土壤草酸 EDTA 混合淋洗

略论金融发展与劳动报酬比例——基于中国省级面板数据的分析

在线全文

学校读者我要写书评

暂无评论

经济问题 2008年第10期 8-12,17页

作者：姜磊黄川南开大学经济学系天津300071

分析了金融发展对劳动报酬比例的影响，并利用1996～2006年间29个省级单位面板数据进行了实证分析。结果表明，金融发展规模和金融发展效率对劳动报酬比例产生了正面影响。该结果对不同的样本范围和模型设定具有很强的稳健性。进一步的... 详细信息

分析了金融发展对劳动报酬比例的影响，并利用1996～2006年间29个省级单位面板数据进行了实证分析。结果表明，金融发展规模和金融发展效率对劳动报酬比例产生了正面影响。该结果对不同的样本范围和模型设定具有很强的稳健性。进一步的研究表明，金融发展对东部地区的劳动报酬比例没有显著影响，对中西部地区的劳动报酬比例具有积极影响。

关键词：金融发展就业压力劳动生产率劳动报酬比例