检索结果-南通市图书馆

Optimization of Center of Gravity Position and Anti-Wave Plate Angle of Amphibious Unmanned Vehicle Based on Orthogonal Experimental Method

引用

Computer Modeling in Engineering & Sciences 2024年第5期139卷 2027-2041页

作者： Deyong Shang Xi Zhang fengqi liang Chunde Zhai Hang Yang Yanqi Niu School of Mechanical Electronic&Information EngineeringChina University of Mining and Technology(Beijing)Beijing100083China Institute of Intelligent Mining&Robotics China University of Mining and Technology(Beijing)Beijing100083China

When the amphibious vehicle navigates in water,the angle of the anti-wave plate and the position of the center of gravity greatly influence the navigation *** the relevant research on reducing the navigation resistance of amphibious vehicles by adjusting the angle of the anti-wave plate,there is a lack of scientific selection of parameters and reasonable research of simulation results by using mathematical methods,and the influence of the center of gravity position on navigation characteristics is not considered at the same *** study the influence of the combinations of the angle of the anti-wave plate and the position of the center of gravity on the resistance reduction characteristics,a numerical calculation model of the amphibious unmanned vehicle was established by using the theory of computational fluid dynamics,and the experimental data verified the correctness of the numerical *** on this numerical model,the navigation characteristics of the amphibious unmanned vehicle were studied when the center of gravity was located at different positions,and the orthogonal experimental design method was used to optimize the parameters of the angle of the anti-wave plate and the position of the center of *** results show that through the parameter optimization analysis based on the orthogonal experimental method,the combination of the optimal angle of the anti-wave plate and the position of the center of gravity is *** the numerical simulation result of resistance is consistent with the predicted optimal *** with the maximum navigational resistance,the parameter optimization reduces the navigational resistance of the amphibious unmanned vehicle by 24%.

关键词： Amphibious unmanned vehicle orthogonal experimental design anti-wave plate center of gravity resistance characteristic

来源：

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

The Mechanism of Cisplatin-induced Apoptosis in HeLa Cells

引用

Chinese Journal of Clinical Oncology 2005年第6期2卷 866-869页

作者： Youqing Uu Hui Xing Xiaobing Han Xiaoyan Shi fengqi liang Gang Chen Ding Ma Department of Obstetrics and Gynecology Tongji Hospital Tongji MedicalCollege Huazhong University of Scienceand Technology Wuhan 430030 China.

OBJECTIVE To study the mechanism of apoptosis induced by cisplatin in vitro in HeLa cells cervical cancer cell line. METHODS The inhibitory effect of cisplatin on HeLa cell growth was analyzed by the MTT assay. Cell apoptosis was measured with flow cytometry and Hoechst 33258 staining following cisplatin treatment. The effect of cisplatin on transcription of HPV E6 was analyzed by RT-PCR and protein expression of E6, P53, p21, Bax and Bcl-2 was studied by Western blots. RESULTS Cisplatin inhibited cellular proliferation in a time and dose- dependant manner. The sub-G1 peak by flow cytometry showed a higher apoptotic rate in the experimental group compared to the controls and Hoechst 33258 staining indicated that apoptosis was induced by cisplatin. Results of RT-PCR demonstrated that cisplatin decreased tran- scription of E6. Western Blots showed that cisplatin decreased protein expression of E6 and increased protein expression of P53, p21 and Bax but had no effect on protein expression of Bcl-2. CONCLUSION Cisplatin induces apoptosis and death of HeLa cells through the suppression of HPV E6 and restoration of p53 function.

关键词： cell apoptosis cisplatin flow cytometry HPV E6 Bax Bd-2 cervix cancer.

来源：

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

SapBase:A central portal for functional and comparative genomics of Sapindaceae species

引用

Journal of Integrative Plant Biology 2024年第8期66卷 1561-1570页

作者： Jiawei Li Chengjie Chen Zaohai Zeng fengqi Wu Junting Feng Bo Liu Yingxiao Mai Xinyi Chu Wanchun Wei Xin Li Yanyang liang YuanLong Liu Jing Xu Rui Xia State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of HorticultureSouth China Agricultural UniversityGuangzhou 510640China Guangdong Laboratory for Lingnan Modern Agriculture South China Agricultural UniversityGuangzhou 510640China Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in South China at the Ministry of Agriculture and Rural Affairs South China Agricultural UniversityCollege of HorticultureGuangzhou 510640China

The Sapindaceae family,encompassing a wide range of plant forms such as herbs,vines,shrubs,and trees,is widely distributed across tropical and subtropical *** family includes economically important crops like litchi,longan,rambutan,and *** the wide application of genomic technologies in recent years,several Sapindaceae plant genomes have been decoded,leading to an accumulation of substantial omics data in this *** surge in data highlights the pressing need for a unified genomic data center capable of storing,sharing,and analyzing these ***,we introduced SapBase,that is,the Sapindaceae Genome *** houses seven published plant genomes alongside their corresponding gene structure and functional annotations,small RNA annotations,gene expression profiles,gene pathways,and synteny block *** offers user-friendly features for gene information mining,co-expression analysis,and interspecies comparative genomic ***,we showcased SapBase's extensive capacities through a detailed bioinformatic analysis of a MYB gene in ***,Sap Base could serve as an integrative genomic resource and analysis platform for the scientific exploration of Sapinaceae species and their comparative studies with other plants.

关键词： functional crops unified

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis and experimental study on resistance-increasing behavior of composite high efficiency autonomous inflow control device

引用

Petroleum Science 2024年第2期21卷 1290-1304页

作者： liang-liang Dong Yu-Lin Zhang School of Mechatronic Engineering Southwest Petroleum UniversityChengdu610500SichuanChina State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500SichuanChina Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan ProvinceChengdu610500SichuanChina

Bottom water coning is the main reason to reduce the recovery of horizontal bottom water reservoir. By water coning, we mean the oil-water interface changes from a horizontal state to a mound-shaped cone and breaks through to the wellbore. Autonomous inflow control device(AICD) is an important instrument maintain normal production after bottom water coning, however, the resistance increasing ability of the swirl type AICD is insufficient at present, which seriously affects the water control effect. Aiming this problem, this paper designs a multi-stage resistance-increasing and composite type AICD. The separation mechanism of oil-water two phases in this structure, the resistance form of oil-water single phase and the resistance-increasing principle of water phase are analyzed. Establishing the dual-phase multi-stage separation and resistance-increasing model, and verified by measuring the throttling pressure drop and oil-water volume fraction of the AICD, it is found that the composite type AICD has the effect of ICD and AICD at the same time, which can balance the production rate of each well section at the initial stage of production, delay the occurrence of bottom water coning. In the middle and later stages of production, water-blocking can be effectively increased to achieve water control and stable *** structural sensitivity analysis, the influence law of various structural parameters on the water control performance of composite AICD was obtained. The simulation calculation results show that,compared with the existing swirl type AICD, composite AICD has higher sensitivity to moisture content,the water phase throttling pressure drop is increased by 4.5 times on average. The composite AICD is suitable for the entire stage of horizontal well production.

关键词： Water control Flow separation Flow resistance-increasing AICD device Simulation and experiment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

ApoA-1和ApoB-100/ApoA-1比值对子痫前期孕妇的预测诊断价值探讨

引用

实用妇产科杂志 2018年第10期34卷 778-781页

作者：梁逢奇夏芬胡燕玲华中科技大学同济医学院附属武汉中心医院湖北武汉430014

目的:检测并比较子痫前期(PE)孕妇和正常健康孕妇血清中载脂蛋白A-1(ApoA-1)、载脂蛋白B-100(ApoB-100)的浓度及ApoB-100/ApoA-1比值,探讨其在预测PE中的诊断价值。方法:收集武汉中心医院2015年6月至2016年6月收治的48例PE孕妇为PE组,... 详细信息

目的:检测并比较子痫前期(PE)孕妇和正常健康孕妇血清中载脂蛋白A-1(ApoA-1)、载脂蛋白B-100(ApoB-100)的浓度及ApoB-100/ApoA-1比值,探讨其在预测PE中的诊断价值。方法:收集武汉中心医院2015年6月至2016年6月收治的48例PE孕妇为PE组,另选择同期健康孕妇48例为对照组。ELISA法检测ApoA-1、ApoB-100浓度,比较两组血清ApoA-1、ApoB-100浓度及ApoB-100/ApoA-1比值,ROC工作曲线检测其诊断PE的诊断效能。结果:PE组ApoA-1浓度显著低于对照组(167. 07±14. 61 mg/dl vs 244. 37±20. 84 mg/dl,P0. 05)。ROC曲线示ApoA-1截断值为210 mg/dl时,预测诊断PE的敏感性为98%,特异性为92%,AUC=0. 971;当ApoB-100/ApoA-1截断值为0. 49时,预测诊断PE的敏感性为92%,特异性为93%,AUC=0. 931。结论:ApoA-1浓度和ApoB-100/ApoA-1比值是PE患者有价值的预测诊断指标,值得临床进一步研究。

关键词：载脂蛋白A-1 载脂蛋白B-100 载脂蛋白B-100 A/载脂蛋白A-1比值子痫前期

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Global existence and large-time behavior for primitive equations with the free boundary

引用

Science China Mathematics 2024年第10期67卷 2303-2330页

作者： Hai-liang Li Chuangchuang liang School of Mathematical Sciences Capital Normal UniversityBeijing 100048China Academy for Multidisciplinary Studies Capital Normal UniversityBeijing 100048China College of Mathematics and Statistics Chongqing UniversityChongqing 401331China

In the present paper, the primitive equations, which can be used to simulate the large-scale motion of the ocean and atmosphere, are considered in the three-dimensional domain bounded below by a fixed solid boundary and above by a free-moving boundary. The global existence and uniqueness of strong solutions are established, and the long-time convergence to the equilibrium state is shown to be either at an exponential rate for the horizontal periodic domain or at an algebraic rate for the horizontal whole space.

关键词： primitive equations the free boundary value problem global well-posedness large-time behavior

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Sufficient Conditions for Amalgamated 3-Manifolds to be ∂-Irreducible

引用

Chinese Annals of Mathematics,Series B 2024年第2期45卷 161-172页

作者： Bing FANG Fengchun LEI liang liang School of Mathematical Sciences Dalian University of TechnologyDalian 116024LiaoningChina School of Mathematics Liaoning Normal UniversityDalian 116029LiaoningChina

In this paper,the authors give some sufficient conditions for an amalgamated 3-manifold along a compact connected surface F with boundary to be ∂-irreducible in terms of distances between some kinds of vertex subsets ... 详细信息

关键词： ∂-Irreducibility Irreducibility Amalgamated 3-manifold Curve complex Arc complex

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Reliability Assessment of a New General Matching Composed Network

引用

China Communications 2024年第2期21卷 245-257页

作者： Zhengyuan liang Junbin liang Guoxuan Zhong Guangxi Key Laboratory of Multimedia Communications and Network Technology School of ComputerElectronics and InformationGuangxi UniversityNanning 530004China Jiangxi Engineering Laboratory of IoT Technologies for Crop Growth Ji’an 343000China

The reliability of a network is an important indicator for maintaining communication and ensuring its stable operation. Therefore, the assessment of reliability in underlying interconnection networks has become an increasingly important research issue. However, at present, the reliability assessment of many interconnected networks is not yet accurate,which inevitably weakens their fault tolerance and diagnostic capabilities. To improve network reliability,researchers have proposed various methods and strategies for precise assessment. This paper introduces a novel family of interconnection networks called general matching composed networks(gMCNs), which is based on the common characteristics of network topology structure. After analyzing the topological properties of gMCNs, we establish a relationship between super connectivity and conditional diagnosability of gMCNs. Furthermore, we assess the reliability of g MCNs, and determine the conditional diagnosability of many interconnection networks.

关键词： conditional diagnosability interconnection networks network reliability super connectivity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

宫颈鳞癌中神经丝蛋白轻链蛋白的表达及临床意义

引用

华中科技大学学报（医学版） 2019年第1期48卷 84-88页

作者：梁逢奇夏芬胡燕玲华中科技大学同济医学院附属武汉中心医院妇产科武汉430014

目的探讨神经丝蛋白轻链蛋白(NEFL)在宫颈鳞癌中的表达及其与临床病理因素和预后的关系。方法回顾性分析武汉市中心医院2009年12月至2015年5月收治入院并行手术治疗的58例宫颈鳞癌患者,收集其临床病理资料并行随访。采用免疫组化法检测... 详细信息

目的探讨神经丝蛋白轻链蛋白(NEFL)在宫颈鳞癌中的表达及其与临床病理因素和预后的关系。方法回顾性分析武汉市中心医院2009年12月至2015年5月收治入院并行手术治疗的58例宫颈鳞癌患者,收集其临床病理资料并行随访。采用免疫组化法检测宫颈鳞癌及癌旁组织中NEFL的表达情况,t检验或卡方检验分析NEFL表达与临床病理因素的关系,Kaplan-Meier生存函数分析计算累计复发及总生存时间,Log-rank检验比较生存曲线间的差异,单因素分析影响累计复发率和总生存率的因素,Cox比例风险模型分析影响预后的相关危险因素。结果宫颈癌肿瘤组织中NEFL的表达低于癌旁组织[(5.845±2.553)vs.(8.741±3.041),P<0.01],且NEFL低表达与FIGO分期(P=0.036)、淋巴结转移(P=0.006)、肿瘤浸润深度(P=0.034)相关。NEFL低表达组3年总生存率低于高表达组(36.66%vs.78.57%,P=0.023),术后3年累计复发率高于高表达组(61.33%vs.17.86%,P=0.018)。单因素分析示肿瘤FIGO分期、浸润深度、淋巴结转移及NEFL染色为总体生存率和累计复发率的影响因素(均P<0.05),多因素分析示FIGO分期Ⅲ/Ⅳ及NEFL低表达为影响总生存率及累计复发率的独立危险因子(均P<0.05)。结论宫颈鳞癌中NEFL的表达低于癌旁组织,NEFL低表达与FIGO分期、淋巴结转移、肿瘤浸润深度有关。NEFL低表达为影响宫颈磷癌总生存率及累计复发率的独立影响因素。

关键词：宫颈鳞癌神经丝蛋白轻链蛋白预后

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Non-interactive SM2 threshold signature scheme with identifiable abort

引用

Frontiers of Computer Science 2024年第1期18卷 171-185页

作者： Huiqiang liang Jianhua CHEN School of Mathematics and Statistics Wuhan UniversityWuhan 430072China

A threshold signature is a special digital signature in which the N-signer share the private key x and can construct a valid signature for any subset of the included t-signer,but less than t-signer cannot obtain any *** the breakthrough achievements of threshold ECDSA signature and threshold Schnorr signature,the existing threshold SM2 signature is still limited to two parties or based on the honest majority setting,there is no more effective solution for the multiparty *** make the SM2 signature have more flexible application scenarios,promote the application of the SM2 signature scheme in the blockchain system and secure cryptocurrency *** paper designs a non-interactive threshold SM2signature schemebasedon partially homomorphic encryption and zero-knowledge *** the last round requires the message input,so make our scheme non-interactive,and the pre-signing process takes 2 rounds of communication to complete after the key *** allow arbitrary threshold t

关键词： SM2 signature secure multi-party computation threshold signature UC-secure dishonest majority

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：