InSb焦平面探测器背面钝化的研究

对N型（111）面的InSb衬底采用两种方法进行钝化处理;一种是直接溅射ZnS,另一种是先用（NH4）2S化学硫化,然后溅射ZnS。C-V测试和器件性能测试表明,在（NH4）2S溶液中进行化学硫化的方法能有效改善ZnS/InSb的界面,这种方法能满足InSb焦平面器件的使用性能。本文还对不同的硫化方法及实验条件进行了对比实验。     

硫化和硒化对Cu/Sn/ZnS预置层薄膜结构和性能的影响

采用磁控溅射法沉积Cu/Sn/ZnS预置层薄膜,经硫化和硒化热处理制备Cu_2ZnSnS_4和Cu_2ZnSnSe_4薄膜,研究两种热处理方式对薄膜的结构、形貌及性能的影响。结果表明:硫化和硒化热处理制备的Cu_2ZnSnS_4和Cu_2ZnSnSe_4薄膜均为单一锌黄锡矿结构;两种薄膜表面及横截面的颗粒致密且均匀,硒化后薄膜的颗粒尺寸和横截面的附着力均优于硫化后的;预置层经硫化及硒化热处理后薄膜的带隙分别为1.58、1.43 e V,硒化后薄膜的带隙明显小于硫化后的。     

炮管烧蚀膛面的俄歇电子能谱及X射线光电子能谱的研究

<正> 一、前言 炮管烧蚀是十分复杂的物理和化学现象。它包括火药气体及弹体对膛面热的(组织变化、残余应力消除、表面熔化及消融)、机械的(冲刷、磨损、疲劳)、化学的(氧化、渗碳、脱碳、氮化、硫化及扩散合金化)交互作用。 烧蚀是影响炮管寿命的一个重要原因。为了研究对策,需要弄清炮管的烧蚀原因,影响烧蚀的因素。通过分析膛面在烧蚀过程中所发生的变化,分析表面的化学组成,来     

CNT复合硫化丁苯橡胶摩擦特性分子动力学模拟

碳纳米管材料可显著提高橡胶材料的物理、化学性能。建立硫化丁苯橡胶和碳纳米管-硫化复合丁苯橡胶的分子动力学模型,探究碳纳米管和硫化联合作用下丁苯橡胶材料的摩擦学特性。结果表明:碳纳米管-硫化丁苯橡胶能有效提高丁苯橡胶的玻璃态转变温度、刚度和抗剪切性能,降低摩擦因数,并在剪切作用过程中限制橡胶原子向接触界面移动,减小界面接触面积、降低界面温度,提高丁苯橡胶的摩擦学性能。     

硫化时间对Cu2ZnSnS4薄膜结构和性能的影响

采用磁控溅射法顺序沉积Cu/Sn/ZnS/Cu/Sn/ZnS/玻璃金属预置层,在530℃经1.5、2.0、3.0 h硫化热处理制备Cu_2ZnSnS_4(CZTS)薄膜,研究硫化时间对CZTS薄膜性能的影响。利用X射线衍射仪(XRD)、拉曼光谱仪(Raman)、扫描电子显微镜(SEM)、紫外-可见分光光度计(UV-VIS)等一系列测试设备对薄膜的结构、组分含量、表面形貌及光学带隙进行表征及计算。研究发现:由于前驱体中Cu_6Sn_5致密层的存在,硫化1.5 h时元素间反应不充分;随着热处理时间的增加,元素间反应更加充分,抑制薄膜中Sn元素的挥发,经2.0、3.0 h硫化热处理后的薄膜为单一CZTS相;同时,随着硫化时间的增加,CZTS薄膜的晶化程度提高,颗粒尺寸和禁带宽度增大。     

硫化铋材料的水热与溶剂热制备进展

纳米金属硫化物因具有优良的物理和化学性能而在离子电池、光催化和半导体器件等方面应用广泛。硫化铋具有独特的层状结构、良好的光学性能和生物兼容性而成为一种重要的半导体材料。水热与溶剂热方法是制备纳米金属硫化物的重要方法。本文综述了硫化铋材料的水热与溶剂热制备的研究进展，并对其发展前景进行了展望。     

ZrO2陶瓷表面化学镀镍沉积机理分析

根据ZrO2陶瓷的化学特性,提出了ZrO2陶瓷表面化学镀镍的特殊前处理过程,分析了其化学反应机理。通过扫描电镜(SEM)、X射线衍射、电子能谱分析(EDS)等方法,对施镀不同时间的镀层的形貌、组成和微观结构进行了分析。结果表明:ZrO2陶瓷表面化学镀镍的沉积过程包括八个阶段,各阶段之间没有严格的界限,在同一时刻基体表面不同的位置化学镀镍可能处于不同的阶段;在化学镀镍的初始阶段镀层是由晶态、微晶构成的。     

炸药件加成型硅橡胶包覆技术研究

针对加成型硅橡胶包覆炸药件催化剂中毒以及脱粘问题,对影响加成型硅橡胶硫化过程的因素及其粘接性开展研究。结果表明：防中毒剂异丙醇铝可较好解决炸药加成型硅橡胶包覆催化剂中毒的问题;催化剂种类及加料顺序对硫化速度有一定影响;适当的硅烷偶联剂以及适宜的表面处理方法可有效改善加成型硅橡胶对炸药的粘接性能。     

介孔分子筛负载SO3H基区域选择性催化硝化邻二甲苯

采用直接合成法制备出由MCM-41介孔分子筛负载SO3H的催化剂,探讨了催化剂表面的酸中心组成,并考察了不同工艺条件下邻二甲苯区域选择性硝化的催化性能.用硫酸钡重量法、透射电镜(TEM)和N2吸附-脱附表征了MCM-41-SO3H的结构.结果表明,MCM-41-SO3H保持了MCM-41的介孔结构,BET表面积高达560m2·g-1,表面含有质子酸中心;得到最宜的工艺条件：催化剂焙烧温度290℃,反应温度65℃,m邻二甲苯/m催化剂＝27,n硝酸/n邻二甲苯＝2.5,反应时间3h,邻二甲苯转化率为92.4%,3,4-二甲基硝基苯的含量达到83.3%.     

提高短切碳纤维对陶瓷基复合材料TiC-TiB_2强韧化的研究

对采用SHS/PHIP技术制备的Cf/TiC-TiB2陶瓷基复合材料中存在短切碳纤维损伤严重,补强增韧效果不明显的原因进行分析研究。研究发现:在B4C+3Ti+Cf体系的SHS反应过程中,由于反应温度太高,使短切碳纤维表面的碳原子与钛粉之间发生化学反应,造成短切碳纤维表面的化学损伤,影响短切碳纤维的性能,进而影响其补强增韧的效果。在SHS反应过程中,防止或减少短切碳纤维化学损伤的主要途径就是添加稀释剂来降低反应温度。在B4C+3Ti+xCf TiC+2TiB2+xCf体系中,通过向反应物中添加稀释剂镍可以有效地防止或减少短切碳纤维的化学损伤,改善各相之间的接触状况,提高各相之间的界面强度,提高短切碳纤维补强增韧的效果。     

Nitrosation and Nitration of Tetraacetyldibenzylhexaazaisowurtzitane

Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.     

A Robust Algorithm for Watermarking 2D Vector Maps with Low Shape-Distortions

The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS （geographical information system） data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

Method for Measuring Velocity of Warhead Fragments Based on Photoelectric Detection

For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.     

Improvement and Experiment of the Reamer in Vibra Cutter Against Wave Edge of Titanium Sheet Alloy Parts

By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.     

数码电子雷管中影响点火头性能因素分析

阐述了数码电子雷管中,点火药剂细结晶三硝基间苯二酚铅（LTNR）的制备工艺;从点火药剂的种类、加入黏合剂的质量分数、桥丝直径、点火头的电阻值、防潮漆的蘸涂等方面对点火头性能的影响因素进行了探讨;通过震动试验、并联起爆试验、延期精度检测与考核,试验结果表明：一次性合成的细结晶LTNR是制造数码电子雷管点火头较为理想的点火药剂,按技术要求生产的点火头性能指标能够满足行业标准要求。     

Experimental Study on the Small Flyer Initiating Behavior of Fine-grained Explosives

The initiating behavior of fine-grained explosives by small flyer is studied. The diameter of small flyer in this device is 1 ram. The test results indicate that the granularity of explosives has great effect on its flyer initiating sensitivity.The flyer initiating sensitivity of the fine-grained explosives is higher and the critical initiating energy is lower than that of common explosives. For common explosive, the flyer initiating sensitivity increases as the density is reduced. But for the fine-grained explosive, the test results are exactly opposite.     

Algorithm for Multi-laser-target Tracking Based on Clustering Fusion

Multi-laser-target tracking is an important subject in the field of signal processing of laser warners. A clustering method is applied to the measurement of laser warner, and the space-time fusion for measurements in the same cluster is accomplished. Real-time tracking of multi-laser-target and real-time picking of multi-laser-signal are introduced using data fusion of the measurements. A prototype device of the algorithm is built up. The results of experiments show that the algorithm is very effective.     

Influence of Installing Error on the Surface Shape Precision of the Axial Symmetry Aspheric Workpiece in Lapping

A method to calculate the surface shape error, which is caused by the installing error between the workpiece and the lapping tool in the process of form lapping, is proposed. The mathematical model which the installing translation error influences on the workpiece surface shape error is established. The changing rule of the error is simulated through the calculating example of the paraboloid workpiece. The results indicate that the surface shape error of the workpiece is increasing with the increase of the installing translation error, it is also increasing gradually along the center point of the curve surface to the edge, and the influence is severer to the curve surface with great curvature than that of the small curvature when the translation error is the same.