搜索结果: 1-15 共查到“工学 BI”相关记录107条 . 查询时间(0.129 秒)
中国科学院物理所Mg3(Bi,Sb)2基热电制冷研究获进展（图）
热电材料 高性能材料
2023/9/16
热电材料可实现热能和电能的直接相互转化。基于热电材料的热电制冷技术，具有调节精度高、响应快的特点。与一般的机械式制冷相比，热电制冷技术不需要压缩传动等运动部件，更不需要制冷剂，不产生任何排放与环境污染，是较为理想的全固态高效制冷及热管理技术。
中国科学院物理所Mg3(Bi,Sb)2基热电制冷研究获进展.（图）
基热电制冷 热电材料 医疗器械
2023/9/18
热电材料可实现热能和电能的直接相互转化。基于热电材料的热电制冷技术，具有调节精度高、响应快的特点。与一般的机械式制冷相比，热电制冷技术不需要压缩传动等运动部件，更不需要制冷剂，不产生任何排放与环境污染，是较为理想的全固态高效制冷及热管理技术。
本发明属于耐热合金的技术领域,具体为一种与Pb和Pb-Bi具有良好相容性的耐辐射新型马氏体耐热钢。钢的成分(重量百分比)是,C：0.05-0.2%；Cr：9.0-12.0%；Si：1.0-3.0%；Mn：0.3-3.0%；W：1.0-3.0%；V：0.1-0.4%；Ta：0.03-0.3%；N：0.03-0.15%；Al≤0.05%；Ti≤0.05%；Fe：余量。本发明增加Si的含量的同时用N替代...
Facile preparation of bi-functional iron doped mesoporous materials and their application in the cycloaddition of CO2
Mesoporous material Cationic polymers Acid-base catalyst Cycloaddition reaction Cyclic carbonate
2023/6/19
Two kinds of bi-functional transition metal doped mesoporous materials (Fe-HMS and Fe-MCM-41) are prepared using one-step hydrothermal method and then treated with hydrochloric acid ethanol solution. ...
中国科学院金属研究所专利：含微量Bi元素的Cu-Cr合金及其凝固制备方法
中科院金属所 专利 Bi元素 Cu-Cr合金
2023/6/16
专利名称：含微量Bi元素的Cu-Cr合金及其凝固制备方法。
Sn-Bi双金属催化剂高效电催化CO2制甲酸盐（图）
Sn-Bi 双金属催化剂 电催化CO2 甲酸盐
2022/6/15
将CO2转化为低碳化学品是目前实现碳减排最有潜力的方式之一。近日，加拿大滑铁卢大学陈忠伟院士、余爱萍教授和Luis Ricardez-Sandoval教授，以及华南师范大学王新研究员共同报道了一种Sn-Bi双金属催化剂，用于电催化CO2为甲酸盐。
Bi掺杂In2TiO5纳米带的制备及其光催化性能
Bi掺杂 In2TiO5纳米带 光催化 降解
2016/7/26
以Bi（NO3）3、Ti（OC4H9）4、In（NO3）3和聚乙烯吡咯烷酮（PVP-K30）为原料，采用静电纺丝法和沉淀法相结合，成功制备了Bi掺杂In2TiO5（Bi-In2TiO5）纳米带。利用X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线能量色散谱（EDS）、紫外-可见漫反射光谱（UV-vis DRS）和氮气吸附-脱附等温线（BET）等技术对样品进行表征。结果表明，Bi的掺杂未引入新...
MEASUREMENTS AND MODELLING OF BI-DIRECTIONAL REFLECTANCE OF WHEAT: PROSAIL VALIDATION RESULTS
Bi-Directional Reflectance Radiative Transfer Model
2015/8/28
In this study, an attempt has been made to define the geometry of sensor and source position to
best relate plant biophysical parameters with bidirectional reflectance of wheat varieties varying in
...
BI-DIRECTIONAL REFLECTANCE DISTRIBUTION FUNCTION (BRDF) RETRIEVALS FROM LABORATORY MULTIANGLE MEASUREMENTS
Bi-Directional Reflectance Distribution Function multiangle observation hyperspectral instrument data processing parameter retrievals
2015/5/29
Theoretical investigations and intense experimental activity have being devoted to study the geometricalproperties of reflection from a surface, that is expressed in terms of Bi-Directional Reflectanc...
Bi-Directional Vector Variable Gain Amplifier for an X-Band Phased Array Radar Application
variable gain phased array complex gain bi-directional amplifier quadrature
2014/12/8
This thesis presents the design, layout, and measurements of a bi-directional amplifier with variable vector (in-phase / quadrature) gain control that will be part of an electronically steered phased ...
Bi-PbO2电极电化学氧化去除模拟废水中氨氮的研究
掺杂铋PbO2电极 电化学氧化 氨氮
2014/12/20
本实验采用钛网作为基体,利用电沉积方法制备了纯PbO2电极和Bi-PbO2电极,通过SEM、XRD、XPS对电极的表面形态进行了表征,利用循环伏安法对Bi-PbO2电极电化学特性进行了研究.同时,以氨氮模拟废水作为研究对象,考察了Bi-PbO2电极的电催化活性,探讨了氨氮电化学氧化降解机理.结果表明,Bi-PbO2电极的形态表征、电催化活性明显高于纯PbO2电极,氨氮的去除效率随电流密度的增加而提...
Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst
Vanadium phosphorus oxide catalyst Promoter n-Butane oxidation Maleic anhydride selectivity
2014/3/11
Vanadium phosphorus oxide (VPO) catalysts were synthesized by the dihydrate method which involved the two steps for the preparation of the dihydrate (VOPO4×2H2O) and the precursor hemihydrate (VOHPO4×...
Modified NSGA-II for a Bi-Objective Job Sequencing Problem
Job Sequencing Multi-Objective Evolutionary Algorithm (MOEA) NSGA-II (Non-Dominated Sorting Genetic Algorithm-II) Tardiness Deterioration Cost
2013/1/28
This paper proposes a better modified version of a well-known Multi-Objective Evolutionary Algorithm (MOEA) known as Non-dominated Sorting Genetic Algorithm-II (NSGA-II). The proposed algorithm contai...
以Bi-Pt/H-mordenite为催化剂,对甘油(GLY, Glycerol)选择性氧化制备二羟基丙酮(DHA, Dihydroxyacetone)进行了研究。采用BET对催化剂进行表征,结果表明,催化剂的比表面积对催化剂的反应性能影响较小。甘油的裂解是主要的副反应,而H-mordenite可以抑制甘油的裂解,提高DHA的选择性。最佳反应条件为温度353 K,反应时间2~4 h,空气流量20 ...
AREA-BASED SNOW DAMAGE CLASSIFICATION OF FOREST CANOPIES USING BI- TEMPORAL LIDAR DATA
Change detection airborne laser scanning logistic regression
2014/6/5
Multitemporal LiDAR data provide means for mapping structural changes in forest canopies. We demonstrate the use of area-based estimation method for snow damage assessment. Change features of bi-tempo...