检索结果-南通市图书馆

湿法炼锌浸出渣中稀贵金属富集工艺优化及对策

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

世界有色金属 2024年第12期 21-24页

作者：赵巨宏冶玉花李涛白银有色集团股份有限公司甘肃白银730900

本文主要阐述了湿法冶炼锌浸出渣中稀有贵金属富集工艺优化及对策研究。通过对浸出渣处理方法的分析和浸出工艺的优化,使浸出渣中的贵金属得到富集和回收。结合理论,提出了更合理的工艺控制条件,对浸出渣的回收、环境保护及提升经济效... 详细信息

本文主要阐述了湿法冶炼锌浸出渣中稀有贵金属富集工艺优化及对策研究。通过对浸出渣处理方法的分析和浸出工艺的优化,使浸出渣中的贵金属得到富集和回收。结合理论,提出了更合理的工艺控制条件,对浸出渣的回收、环境保护及提升经济效益都起到了积极的作用。

关键词：湿法炼锌浸出渣稀贵金属富集

High-security multi-constellation shaping modulation with asymmetric encryption

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2024年第4期22卷 14-19页

作者：姜蕾刘博任建新吴翔宇 Rahat Ullah 毛雅亚陈帅东马一澜赵立龙田凤 Beijing University of Posts and Telecommunications Beijing 100876China Nanjing University of Information Science&Technology Nanjing 210044China

This Letter proposes a high-security modulation scheme for optical transmission *** using multi-constellation shaping and asymmetric encryption,the information security can be enhanced and quantum computer cracking can be effectively ***-dimensional(3D)carrier-less amplitude phase modulation is utilized to superposition and transmit 3D *** verification is conducted using a seven-core weakly coupled fiber *** results demonstrate that the proposed scheme can effectively protect the system from any illegal attacker.

关键词： multi-core transmission asymmetric encryption multi-constellation shaping

混合施肥对玉米生产和土壤生态的影响研究进展

在线全文

学校读者我要写书评

暂无评论

玉米科学 2024年第5期32卷 96-104页

作者：赵新颖张淑莹肖丹刘迎春滕星肖艳华吉林省农业科学院长春130033 吉林省动物疫病预防控制中心长春130062

过量的化肥投入对增产的作用已经不明显,如何提高肥料利用率,如何在稳产的同时提高耕地质量,确保农业可持续发展,已成为国家农业战略调整行动方案的主要内容。梳理秸秆、粪污、新型有机肥料和化肥施用对我国玉米种植的应用研究现状,就... 详细信息

过量的化肥投入对增产的作用已经不明显,如何提高肥料利用率,如何在稳产的同时提高耕地质量,确保农业可持续发展,已成为国家农业战略调整行动方案的主要内容。梳理秸秆、粪污、新型有机肥料和化肥施用对我国玉米种植的应用研究现状,就化肥减施条件下各有机措施和化肥的混合施肥对玉米生产和农田土壤的研究成果进行综述。在技术和政策层面,提出以提高耕地综合生产力为目标,依靠技术引领肥料高效利用,按照增产潜力做好区域性的施肥管理建议,粪污无害化处置后的有机肥应纳入当地政府还田实施项目中的优先采购产品,促进本地循环农业良性发展。

关键词：玉米混合施肥有机肥化肥减施秸秆品质

在线全文

学校读者我要写书评

暂无评论

论孙未“大地三部曲”的旅行书写与治愈功能

中华女子学院学报 2024年第1期36卷 74-81页

作者：黄华任佳菅丽欣赵晨露首都师范大学文学院 100089 北京市第一六六中学 100089

孙未的“大地三部曲”由《大地尽头》《熊的自白书》和《寻花》组成,通过书写从繁华都市到边陲古村的旅行经历,寄托作者的旅途感悟与情思,突出旅行的治愈功能。作品迎合了当代人迫切的心灵治愈需求,是“70后”女作家“治愈系”文学的代... 详细信息

孙未的“大地三部曲”由《大地尽头》《熊的自白书》和《寻花》组成,通过书写从繁华都市到边陲古村的旅行经历,寄托作者的旅途感悟与情思,突出旅行的治愈功能。作品迎合了当代人迫切的心灵治愈需求,是“70后”女作家“治愈系”文学的代表。“大地三部曲”既是女性“在路上”的情感记录,又反映出现代人对生活意义和奋斗目标的反思。作品中自由独立的女性意识、个性鲜明的人物形象、优美灵性的风景、充满古典意趣的文字,旨在抚慰现代人疲惫敏感的心灵,以优美的自然风景对抗异化的城市风景,以古典的慢生活改良现代城市生活的快节奏。作为治愈系旅行文学的“大地三部曲”,折射出当代青年的社会心理和文化症候。

关键词：孙未 “大地三部曲” 旅行书写治愈系文学

维普期刊数据库博看期刊

在线全文

学校读者我要写书评

暂无评论

磨球钢B2可浇性差的成因分析与控制

河北冶金 2024年第6期 58-63页

作者：杨文李萌赵华闫璐王瑞敏河钢集团邯钢公司河北邯郸056003

针对河北某厂磨球用钢B2在浇注过程,偶发中间包塞棒上涨,可浇性差的现象,采用金相显微镜、扫描电镜及能谱仪对冶炼过程中各工序钢水内的显微夹杂物、大型夹杂物以及精炼渣进行了分析。结果表明,精炼造渣操作不稳定;RH冶炼过程及静吹结束... 详细信息

针对河北某厂磨球用钢B2在浇注过程,偶发中间包塞棒上涨,可浇性差的现象,采用金相显微镜、扫描电镜及能谱仪对冶炼过程中各工序钢水内的显微夹杂物、大型夹杂物以及精炼渣进行了分析。结果表明,精炼造渣操作不稳定;RH冶炼过程及静吹结束后,夹杂物去除率分别为9.3%、8.1%、8.7%,中间包内显微夹杂物种类主要为Al_(2)O_(3)-MnS夹杂,钙铝酸盐夹杂,硅铝酸盐夹杂和MnS夹杂,来自RH出站时夹杂物的继承,还有少量SiO_(2)-CaO-MgO复合夹杂物,为卷渣产物;大型夹杂物含量分别为23.9 mg/10 kg、32.7 mg/10 kg、22.8 mg/10 kg,平均含量为26.5 mg/10 kg,高于国内同类钢种的先进水平5 mg/10 kg。大型夹杂物种类主要以Al_(2)O_(3)-SiO_(2)-CaO、Al_(2)O_(3)-SiO_(2)-CaO-MnO、Al_(2)O_(3)-SiO_(2)-CaO-MnO-MgO复合脱氧产物为主,约占夹杂物总量的90%以上,大小分布在50~300μm。其中部分脱氧夹杂物含有K、Na等元素,说明夹杂物主要为脱氧产物在上浮过程中粘附钢包渣、中间包渣,反映出钢包渣和中间包渣吸附夹杂物能力不足。明确了可浇性差的主要原因是精炼渣和中间包渣吸附夹杂物效果不理想,LF炉造渣不稳定,且中间包钢水流场易造成卷渣,生成了大型夹杂物。通过优化精炼渣和更换中间包渣,优化中间包钢水流场等措施,基本杜绝了钢水流动性问题,钢水质量得到了有效提高。

关键词：磨球钢可浇性流动性夹杂物卷渣精炼渣流场

Prognostic comparison of operative and non-operative therapies for intracerebral hemorrhage in a local hospital: Case retrospection

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2006年第5期1卷 465-467页

作者： Deming zhao Zenghong jiang Bin Wang Department of Neurology huaibei People＇s Hospital Huaibei 235000 Anhui Province. China Department of Cerebral Surgery Huaibei People＇s Hospital Huaibei 235000 Anhui Province. China

BACKGROUND： At present, it is satisfactory for micro-trauma craniopuncture therapy for cerebral hemorrhage to treat spontaneous intracerebral hemorrhage （ICH）. Surgical treatment can decrease fatality rate of ICH patients; however, some reports suggest that there are no obvious differences of therapeutic effects between surgical treatment and medical therapy because of various states, operative indications, contraindications and operative styles. OBJECTIVE： To observe the effect of surgical treatment on ICH prognosis, especially on fatality rate.DESIGN ： Retrospective-case study.SETTING： huaibei People＇s Hospital.PARTICIPANTS： ① A total of 241 ICH patients selected from huaibei People＇s Hospital from January 1988 to May 1989 were regarded as group A. They were all coincidence with Diagnostic Criteria of Intracerebral Hemorrhage in the National Cerebrovascular Disease Academic Meeting. There were 164 males and 87 females aged 34-94 years, and among them, 230 patients were older than 50 years （95.4%）. Hemorrhage sites： Among 142 patients, 85 cases had internal capsule hemorrhage, 18 external capsule hemorrhage, 15 thalamic hemorrhage, 9 cerebellar hemorrhage, 7 brain stem hemorrhage, 7 cerebral lobe hemorrhage, and 1 corpus callosum hemorrhage. Hemorrhage volume： Among 89 clear records, 44 cases had of 1-10 mL, 35 of 11-30 mL, 5 of 31-40 mL, and 5 of 41-80 mL. Except 2 patients, other ones were treated with medical operation. ② A total of 203 ICH patients selected from the same hospital from January 2003 to December 2005 were regarded as group B. Among them, 72 cases were treated with operation, but other 131 ones were treated with non-operation. They were all diagnosed with CT. There were 113 males and 90 females aged 30-88 years, and among them, 183 patients were older than 50 years （90.1%）, Hemorrhage sites： Among 203 patients, 104 cases had internal capsule hemorrhage, 17 external capsule hemorrhage, 19 thalamic hemorrhage, 9 cerebellar hemorrhage, 12 brai

关键词： surgical treatment intracerebral hemorrhage Cerebrovascular Disease brain stem therapeutic effects Diagnostic Criteria lateral ventricle medical therapy corpus callosum blood pressure

InAs/InAsSb type-Ⅱ superlattice with near room-temperature long-wave emission through interface engineering

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第3期41卷 982-991页

作者： Bo-Wen Zhang Dan Fang Xuan Fang Hong-Bin zhao Deng-Kui Wang Jin-hua Li Xiao-hua Wang Dong-Bo Wang State Key Laboratory of High Power Semiconductor Lasers School of ScienceChangchun University of Science and TechnologyChangchun 130022China School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China State Key Laboratory of Advanced Materials for Smart Sensing General Research Institute for Nonferrous MetalsBeijing 100088China Department of Opto-electronic Information Science School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China

Ga-free InAs/InAsSb type-Ⅱ superlattices(T2SL) have extensive application prospective in infrared photodetectors. Achieving higher operation temperature is critical to its commercial applications. Here, a fractional monolayer alloy method was used to grow InAsSb alloy with better controlled alloy composition. The as-grown T2SL gave eleven satellite peaks and a first satellite peak with a narrow full-width-half-maximum (FWHM) of 20.5arcsec (1 arcsec=0.01592°). Strain mapping results indicated limited Sb diffusion through the As-Sb exchange process at the interface. Moreover, unlike interface states caused by the As-Sb exchange effect, this relatively clear interface was distinctive with localized states with higher activation energies of the non-radiative recombination process ((18±1) meV and (84±12) meV at different temperature ranges), which means that this interface state introduced by fractional monolayer alloy growth method can effectively suppress Auger recombination process in T2SL. Through this interface engineering of InAs/InAsSb Type-Ⅱ superlattice, it achieved detective photoluminescence (PL) signal with the center wavelength of 9μm at 250K.

关键词： InAs/InAsSb Superlattice Interface states High operation temperature emission

在线全文

学校读者我要写书评

暂无评论

大气湍流对高分辨率遥感卫星的成像影响研究

中国光学（中英文） 2024年第1期17卷 167-177页

作者：毛红敏丁致雅杨燕燕江苏奇彭建涛曹楠胡立发曹召良苏州科技大学物理科学与技术学院江苏苏州215009 江苏省微纳热流技术与能源应用重点实验室江苏苏州215009 江南大学理学院江苏无锡214122 中国航天科技集团公司上海卫星工程研究所上海201109

遥感卫星在国防和民用探测等领域发挥着重要作用,而大气湍流严重影响高分辨率遥感卫星的成像质量。本文重点研究了遥感卫星对地探测时,相机口径、卫星轨高和大气湍流强度对空间相机成像质量的影响。首先,基于球面波传输模型和Kolmogoro... 详细信息

遥感卫星在国防和民用探测等领域发挥着重要作用,而大气湍流严重影响高分辨率遥感卫星的成像质量。本文重点研究了遥感卫星对地探测时,相机口径、卫星轨高和大气湍流强度对空间相机成像质量的影响。首先,基于球面波传输模型和Kolmogorov湍流理论,针对空对地探测湍流波前进行仿真。然后,分析畸变波前随相机口径、卫星轨高和大气相干长度的变化规律,并推导出普适公式。在此基础上,进一步推导出空间相机成像分辨率随相机口径、卫星轨高和大气相干长度变化的计算公式。最后,研究了大气湍流对空间相机调制传递函数(MTF)的影响,并以MTF=0.15为基准,仿真分析了MTF相对误差随相机口径、卫星轨高和大气相干长度的变化规律。本研究为高分辨率遥感卫星的设计、分析和评估提供理论依据。

关键词：高分辨率卫星大气湍流空对地观测成像质量

维普期刊数据库博看期刊

Gastric adenomyoma presenting as melena: A case report and literature review

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2010年第15期16卷 1934-1936页

作者： Zhu, Hui-Neng Yu, jiang-Ping Luo, Juan jiang, You-hua Li, Jian-Qiang Sun, Wen-Yong Zhejiang Canc Hosp Dept Pathol Hangzhou 310022 Zhejiang Peoples R China Zhejiang Canc Hosp Dept Thoracicoabdominal Surg Hangzhou 310022 Zhejiang Peoples R China

Gastric adenomyoma (AM) is a rare benign tumor characterized by glandlike structures embedded within a smooth muscle stroma. We report a case of a 68yearold man with gastric AM admitted to our hospital for melana. Endoscopic examination revealed a gastric mass of about 4 cm in diameter, located in the antrum. Histologic examination of the excised specimen showed irregularly arranged glands and interlacing smooth muscle bundles surrounding the glandular elements. Although gastric AM is rare, it should be considered in differential diagnosis of extramucosal gastric tumor.

关键词： Adenomyoma Stomach Melana Histopathology Endoscopic examination