检索结果-南通市图书馆

Journal of Iron and Steel Research International 2018年第5期25卷 506-514页

作者： De-qing Zhu Zheng-qi Guo Jian Pan zhao-yuan wang School of Minerals Processing and Bioengineering CentralSouth University Changsha 410083 Hunan China Engineering Design and Research Institute Northern HeavyIndustries Group Shenyang 110141 Liaoning China

Indian hematite fines are normally characterized by high iron grade and minor impurities, which are usually used for sinter fines. With macroscale operations technology of blast furnace in Indian, pellets, as a kind of high-quality materials, attract more and more attention. However, the hematite fines possess the coarse size. Hence, they inevitably need to be further finely ground for pelletizing before balling. The grinding behavior of Indian hematite fines was revealed by conducting the ball milling tests and determining the Bond ball mill work index （Wi）. The results show that Indian hematite fines have an excellent grindability with Wi of only 7.40-7.73 kWh/t, indicating that ball milling is an economically viable way to pretreat Indian hematite fines. Nonetheless, due to poor sedimentation and filtering properties of wet ground products, the dry ball milling is more appropriate to process Indian hematite fines. In addition, the superior quality green balls can be manufactured with dry ground products under the conditions of 0.5% bentonite dosage, 7.5% moisture and balling for 12 min, which further confirmed that the recommended pellet feed preparation technique is reasonable.

关键词： Indian hematite fine · Dry ball milling · Wet ball milling · Bond work index · Sedimentation characteristic ·Filtration characteristic

The epidermal immune microenvironment plays a dominant role in psoriasis development,as revealed by mass cytometry

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

Cellular & Molecular Immunology 2022年第12期19卷 1400-1413页

作者： yuan Zhou Fan Xu Xue-Yan Chen Bing-Xi Yan zhao-yuan wang Si-Qi Chen Min Zheng Xiao-Yong Man Department of Dermatology Second Affiliated HospitalZhejiang University School of MedicineHangzhouChina

Psoriasis is a common chronic inflammatory skin *** diversity and heterogeneity of immune cells in human skin have been studied in recent years,but the spatial distribution of immune cells at the single-cell level in the human psoriatic epidermis and dermis remains *** this study,we mapped psoriatic skin immune cells from paired lesional,perilesional,and nonlesional skin samples using mass *** dendritic cells(DCs)were found in the psoriatic epidermis and *** dermal CD1c^(+)CD11b^(+)cDC2s migrated to the epidermis in the perilesional skin during the preinitiation ***1c^(+)CD11b^(+)cDC2s rapidly replaced EpCAM^(+)CD11c^(low) LC cells and initiated ***,CD207^(+)CD11c^(hi) LC and CD5^(+)T cells accumulated in the psoriatic epidermis and orchestrated epidermal inflammation in *** immune cell pool in the psoriatic dermis primarily included APCs and T ***,unlike that in the dermis,the epidermal immune environment was more significant and coincided with the inflammation occurring during psoriasis.

关键词： Psoriasis Cutaneous immune Mass cytometry Dendritic cell

Clinical and pathological changes in cerebral arteriovenous malformations after stereotactic radiosurgery failure

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

Chinese Medical Journal 2008年第12期121卷 1076-1079页

作者： LIU Wei-ming YE Xun zhao yuan-li wang Shuo zhao Ji-zong Department of Neurosurgery Beijing Tiantan Hospital Capital Medical University Beijing 100050 China

Background Stereotactic radiosurgery is an altemative to resection of intracranial cerebral arteriovenous malformations （AVMs）, while it will fail in some cases. This study aimed to evaluate the changes after stereotactic radiosurgery for AVMs.Methods Nineteen cases with cerebral AVMs had failure after stereotactic radiosurgery therapy. The symptoms and angiography were assessed. All patients underwent microsurgery. Pathologic examination was performed for all cases and electron microscopic examination was carried out in 6 patients.Results Seven cases had hemorrhage from 12 to 98 months after stereotactic radiosurgery, 5 had headache, 4 had refractory encephalon edema, 2 had epilepsy as a new symptom and 1 had a pressure cyst 5 years after radiosurgery. Angiography in 18 cases, 8-98 months after radiation therapy, demonstrated no significant changes in 5 cases, slight reduction in 9, near complete obliteration in 1 and complete obliteration in 3. An abnormal vessel was found on pathologic examination in 17 cases, even one case had obliterated in angiography. Electron microscopy examination showed vessel wall weakness, but the vessels remained open and blood circulated. One case died because of a moribund state before surgery. The other 18 cases had no new neurological deficiencies, seizure control and no hemorrhage occurred after microsurgery at an average follow-up of 3 years.Conclusion Stereotactic radiotherapy for AVMs should have a long period follow-up. If serious complications occur, microsurgery can be performed as salvage treatment.

关键词： cerebral arteriovenous malformations stereotactic radiosurgery microsurgery complications

Laser Doppler flowmeter study on regional cerebral blood flow in early stage after standard superficial temporal artery-middle cerebral artery bypass surgery for moyamoya disease

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2009年第20期122卷 2412-2418页

作者： GESANG Dun-zhu ZHANG Dong zhao Ji-zong wang Shuo zhao yuan-li wang Rong SUN Jian-jun MENG Ze Department of Neurosurgery Beijing Tiantan Hospital Capital Medical University Beijing 100050 China

Background Standard superficial temporal artery-middle cerebral artery （STA-MCA） bypass surgery is an effective treatment for moyamoya disease, but recent evidence suggests that postoperative cerebral hyperperfusion can occur. In this study, the trendline of changes in regional cerebral blood flow （rCBF） after surgery were continually monitored near the site of anastomosis in order to investigate both the efficacy of the procedure for improving rCBF and the possible risk of hyperperfusion . Methods Standard STA-MCA bypass surgery was performed on 13 patients, rCBF was measured continually using laser Doppler flowmetry （LDF） until the 5th day after the operation with the LDF probe implanted adjacent to the area of the anastomosis. The trendline of rCBF changes postoperatively was recorded for the analysis performed using SPSS 13.0. Results The baseline LDF value of cortical rCBF was （84.68±14.39） perfusion unit （PU）, which was linear relative to absolute perfusion volume before anastomosis and （88.90±11.26） PU immediately after anastomosis （P 〉0.05）. The value changed significantly from before to after anastomosis （P 〈0.05）; it was （417.72±21.35） PU on the 1st day after surgery, and （358.99±18.01） PU, （323.46±17.38） PU, （261.60±16.38） PU and （375.72±18.45） PU on the following 4 days, respectively. The rCBF decreased gradually from the 2nd day until the 4th postoperative day, but still was at a high level （P 〈0.05）. However, on the 5th postoperative day the rCBF increased again to the second highest level, which was significantly different compared with the baseline value （P 〈0.05）, but not significantly different compared with the values on the other 4 days （P〉0.05）. Conclusions STA-MCA anastomosis improves the cerebral blood supply significantly in the early stage after surgery, however, the risk of symptomatic hyperperfusion may exist, which may possibly occur on the 1st day and 5th day after surgery. A LDF is useful for postoperative monitoring for both the effica

关键词： moyamoya disease STA-MCA bypass laser-Doppler flowmetry regional cerebral blood flow

The evaluation of the growth pattern of coal-production in Jiangsu Province and suggestions for its sound development

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Science and Engineering 2008年第10期2卷 57-63页

作者： zhao yuan wang Li-shan HAO Li-sha College of Geographic Science Nanjing Narmal University Nanjing 210046 China

Using Cobb-Douglas production function and Solow Residual, this study establishes a discriminant index to measure the intensive index of coal-production at the section-level, so as to analyze the transfer trend of the growth pattern of Jiangsu＇s coal-production since 1990s. The research shows that the transition of coal production in Jiangsu Province has mainly experienced three phases, which are the quick transition phase from extensive growth to intensive growth （from 1990 to 1994）, the fluctuation phase （from 1995 to 1999）, and the transition back phase from intensive growth to extensive growth （from 2000 to 2003）. On the whole, the coal production in Jiangsu Province nowadays is still featured by extensive growth pattern and largely dependent upon capital inputs. Finally, from the aspect of the technology progress, improving the qualities of labor, changing product structures and improving enterprise management, this study puts forward suggestions on how to transfer the growth pattern of Jiangsu＇s coal-production into intensive type.

关键词： coal-production growth pattern discriminant model suggestion

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

面向并行空间连接的两轮映射数据划分方法

浙江大学学报（工学版） 2017年第1期51卷 212-224页

作者：付仲良赵星源王楠杨元维武汉大学遥感信息工程学院湖北武汉430079 地球空间信息技术协同创新中心湖北武汉430079 中国科学院遥感与数字地球研究所北京100094

针对数据划分结果高冗余、低均衡可能会增加系统的工作负荷和影响系统的负载均衡这一问题,提出两轮映射数据划分方法.在第一轮映射中,通过充分利用划分对象的空间属性来减少冗余数据,通过合理设置阈值来均衡划分数据;在第二轮映射中,通... 详细信息

针对数据划分结果高冗余、低均衡可能会增加系统的工作负荷和影响系统的负载均衡这一问题,提出两轮映射数据划分方法.在第一轮映射中,通过充分利用划分对象的空间属性来减少冗余数据,通过合理设置阈值来均衡划分数据;在第二轮映射中,通过动态映射机制,提高划分结果的数据量均衡度.与Oracle Spatial数据划分方法、线性编码轮询调度划分方法以及Hilbert编码轮询调度划分方法进行比较可知,采用两轮映射方法可以有效地控制冗余数据的产生,大幅提高划分结果的数据量均衡度,具备较好的划分效率.

关键词：地理信息系统空间数据划分空间连接

电网可靠性非序贯蒙特卡洛仿真的扩展交叉熵法

在线全文

学校读者我要写书评

暂无评论

中国电机工程学报 2017年第7期37卷 1963-1973页

作者：赵渊王洁耿莲元一平双滟杰输配电装备及系统安全与新技术国家重点实验室(重庆大学) 重庆市沙坪坝区400044

通过估计失效事件的最优抽样概率密度函数,交叉熵法可有效降低失效事件的稀疏性,并显著提高电网可靠性蒙特卡罗仿真的收敛性。但目前交叉熵法局限于服从伯努利分布的随机变量,例如两状态线路失效模型,对于多状态离散随机变量(考虑降额... 详细信息

通过估计失效事件的最优抽样概率密度函数,交叉熵法可有效降低失效事件的稀疏性,并显著提高电网可靠性蒙特卡罗仿真的收敛性。但目前交叉熵法局限于服从伯努利分布的随机变量,例如两状态线路失效模型,对于多状态离散随机变量(考虑降额的发电机)以及连续随机变量(风速、负荷等)尚待拓展。该文提出一种可以计及多状态离散型和连续型随机变量的扩展交叉熵法,给出了多状态离散型随机变量和连续型随机变量概率分布的交叉熵参数寻优方法,同时在此基础上融合预抽样阶段和最优抽样阶段的样本信息得到综合可靠性指标,进一步提升了电网可靠性评估扩展交叉熵法的计算效率。以IEEE-RTS79可靠性测试系统为例,考虑发电机降额状态和负荷随机波动,对含有风电场的电力系统进行可靠性评估,验证了该文方法的高效性。

关键词：可靠性评估交叉熵扩展交叉熵蒙特卡罗仿真

在线全文

学校读者我要写书评

暂无评论

针孔引流在腋臭小切口吸刮术治疗中的应用

中国现代医学杂志 2017年第30期27卷 117-119页

作者：王肇源武汉大学中南医院整形外科湖北武汉430071

目的探讨针孔引流在腋臭吸刮术治疗中的应用。方法 90例腋臭患者采用腋部小切口,肿胀麻醉下刮吸去除大汗腺后行针孔引流。结果 1周内随访,所有患者伤口均Ⅰ期愈合,皮下无血肿、无坏死。结论针孔引流可以作为腋臭吸刮术治疗的有效引流方法。

关键词：腋臭小切口针孔引流

PIR传感器网络中行为轨迹重构的几何代数方法

在线全文

学校读者我要写书评

暂无评论

电子学报 2017年第5期45卷 1096-1102页

作者：王健健冯琳耀朱帅罗文俞肇元袁林旺南京师范大学虚拟地理环境教育部重点实验室江苏南京210023 重庆知行地理信息咨询服务有限公司重庆404100 江苏省地理环境演化国家重点实验室培育建设点江苏南京210023 江苏省地理信息资源开发与利用协同创新中心江苏南京210023

基于高密度、低成本的PIR(Passive Infrared Detector)被动式红外探测器传感器进行人群行为轨迹的定位与重建是人群行为分析的重要方向.PIR传感器通过0-1响应确定附近是否有行人通过,并通过不同传感器响应序列的时空序列关系实现对人群... 详细信息

基于高密度、低成本的PIR(Passive Infrared Detector)被动式红外探测器传感器进行人群行为轨迹的定位与重建是人群行为分析的重要方向.PIR传感器通过0-1响应确定附近是否有行人通过,并通过不同传感器响应序列的时空序列关系实现对人群行为轨迹的识别与跟踪.已有PIR传感器网络分析方法多从群体行为视角揭示人群运动的统计特征,在行为估算精度、不确定性等方面仍存在诸多问题.本文针对PIR传感器网络中个人行为轨迹的重构问题,引入几何代数工具,实现PIR传感器网络拓扑、时空响应数据序列和行为轨迹的代数化统一表达,进而以传感器响应的时空关系为基础进行网络连通性的判定.基于几何代数算子构建轨迹路径的延拓与扩展规则,并集成传感器对轨迹的时空响应关系构建基于PIR传感器网络响应序列数据的行为轨迹重构算法.最后以MERL实验室连续观测数据为案例,论证了方法的合理性与有效性.

关键词：行为轨迹传感器网络几何代数网络分析

Decision making module based on stochastic magnetic tunnel junctions

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 202-209页

作者： Yifan Miao Li zhao Yajun Zhang Zhe yuan Center for Advanced Quantum Studies and Department of Physics Beijing Normal University Institute for Nanoelectric Devices and Quantum Computing Fudan University Interdisciplinary Center for Theoretical Physics and Information Sciences Fudan University

In biological neural systems, noise is ubiquitous but does not affect the correct decisions made in the complex cognitive ***-making in biological neural system is typically achieved by accumulating input information over a period of *** by recent developments in neurosciences, we design a decision-making module based on spintronic devices, utilizing superparamagnetic tunnel junctions as artificial neurons. The feasibility of this decision-making module is verified through circuit simulations. Taking a multi-layer perceptron as an example, the module significantly improves the accuracy of the perceptron in the handwritten digit recognition task. Furthermore, the spintronic decision-making module offers advantages over the conventional pooling methods, such as adaptive decision time, high performance and the absence of analog-to-digital conversion. The decision-making module is flexible to be integrated into artificial neural networks and provides a general yet effective solution to enhance performance against device noise.

关键词： neuromorphic computing spintronics magnetic tunnel junction neural networks