Integrative interaction analysis using threshold gradient directed regularization

For many complex business and industry problems, high‐dimensional data collection and modeling have been conducted. It has been shown that interactions may have important implications beyond the main effects. The number of unknown parameters in an interaction analysis can be larger or much larger than the sample size. As such, results generated from analyzing a single data set are often unsatisfactory. Integrative analysis, which jointly analyzes the raw data from multiple independent studies, has been conducted in a series of recent studies and shown to outperform single–data set analysis, meta‐analysis, and other multi–data set analyses. In this study, our goal is to conduct integrative analysis in interaction analysis. For regularized estimation and selection of important interactions (and main effects), we apply a threshold gradient directed regularization approach. Advancing from the existing studies, the threshold gradient directed regularization approach is modified to respect the “main effects, interactions” hierarchy. The proposed approach has an intuitive formulation and is computationally simple and broadly applicable. Simulations and the analyses of financial early warning system data and news‐APP (application) recommendation behavior data demonstrate its satisfactory practical performance.     

Tesla变压器与Blumlein线一体化装置设计

介绍了Tesla变压器与Blumlein线一体化装置的基本原理,设计了Tesla变压器及Blumlein线的参数。对装置中绝缘薄弱点进行了电场分析,结果表明:Blumlein线结构设计满足变压器油中绝缘的要求,可以保证装置安全稳定运行。最后对整个装置进行了全电路模拟,模拟结果表明:形成线充电电压可达1.37MV,此时,50Ω上可得到脉冲电压的辐值约为1.4 MV,脉宽约为40 ns,满足设计要求。     

内外流一体化飞行器动导数数值预测

研究内外流一体化飞行器通流模型和带整流罩模型，考核强迫振荡法和自激振荡法在内外流一体化飞行器上的适用性，详细分析时间步长、振荡频率等参数对动导数的影响.研究发现，强迫振荡法在内外流一体化飞行器动导数预测中具有较好的适用性，但与常规的纯外流飞行器相比，时间步长的选取、计算时间及振荡频率等参数的选择都有较大不同.对常规的纯外流飞行器，自由振荡法的预测结果与强迫振荡法符合较好，但对内外流一体化飞行器外形，两者相差50%以上，差异的来源及产生的机理尚需开展深入的研究.     

Integrative Self‐Sorting: One‐Pot Synthesis of a Hetero[4]rotaxane from a Daisy‐Chain‐Containing Hetero[4]pseudorotaxane

The structural complexity of mechanically interlocked molecules are very attractive to chemists owing to the challenges they present. In this article, novel mechanically interlocked molecules with a daisy‐chain‐containing hetero[4]rotaxane motif were efficiently synthesized. In addition, a novel integrative self‐sorting strategy is demonstrated, involving an ABB‐type (A for host, dibenzo‐24‐crown‐8 (DB24C8), and B for guest, ammonium salt sites) monomer and a macrocycle host, benzo‐21‐crown‐7 (B21C7), in which the assembled species in hydrogen‐bonding‐supported solvent only includes a novel daisy‐chain‐containing hetero[4]pseudorotaxane. The found self‐sorting process involves the integrative recognition between B21C7 macrocycles and carefully designed components simultaneously containing two types of secondary ammonium ions and a host molecule, DB24C8 crown ether. The self‐sorting strategy is integrative to undertake self‐recognition behavior to form one single species of pseudorotaxane compared with the previous report. This self‐sorting system can be used for the efficient one‐pot synthesis of a daisy‐chain‐containing hetero[4]rotaxane in a good yield. The structure of hetero[4]rotaxane was confirmed by ¹H NMR spectroscopy and high‐resolution electrospray ionization (HR‐ESI) mass spectrometry.     

Designed Enclosure Enables Guest Binding Within the 4200 Å3 Cavity of a Self‐Assembled Cube

Metal–organic self‐assembly has proven to be of great use in constructing structures of increasing size and intricacy, but the largest assemblies lack the functions associated with the ability to bind guests. Here we demonstrate the self‐assembly of two simple organic molecules with Cd^II and Pt^II into a giant heterometallic supramolecular cube which is capable of binding a variety of mono‐ and dianionic guests within an enclosed cavity greater than 4200 ų. Its structure was established by X‐ray crystallography and cryogenic transmission electron microscopy. This cube is the largest discrete abiological assembly that has been observed to bind guests in solution; cavity enclosure and coulombic effects appear to be crucial drivers of host–guest chemistry at this scale. The degree of cavity occupancy, however, appears less important: the largest guest studied, bound the most weakly, occupying only 11 % of the host cavity.     

Integrative CAD/CAE/CAM for complicated panel metal stamping of oil pan used in the car engine

The oil pan used in car engine is one of the important structure parts in the car, which is, in general, deep drawn and difficult to form. The deep-drawing processes of the oil pan used in the engine for “Small Flag” Car of the First Automobile Manufactory is analyzed by using the integrative CAD/CAE/CAM technique of stamping die, including the CAD software CATIA and the sheet-metal stamping CAE software KMAS developed independently. Through an analysis of die structure and formability using the KMAS software, the primary twi-off deep-drawing has successfully been changed to the one-off deep-drawing, solving the key technical difficulties for the manufactory. Project supported by the National Natural Science Foundation of China (No. 19832020) and the Key Project of Ministry of Education of China.     

基于秩和比法的中国可持续发展经济A系统的综合评价

利用秩和比法对中国可持续发展经济子系统的进行分析和综合评价研究,我们通过时间序列的分析与各指标的发展状态研究结果表明,与中国的实际发展状况相吻合,并对中国发展的总态势给出总结和预测.     

一体化条形码库存MIS的设计思想

根据物料库存管理的特点，本文从预测、管理．订货策略各个方面，以一体化系统设计的观点优化库存管理结构，提出了相应的库存管理信息系统的设计思想，并在微机上做了初步实现．在系统的实现过程中，条形码技术的应相使库存数据的采装集更为方便．     

三线阵CCD立体测绘相机的集成装调

考虑几何精度对三线阵CCD立体测绘相机测绘精度的影响,研究了测绘相机组合体的装调方法以建立和保证相机的空间几何关系。首先,介绍了测绘相机组合体的结构和坐标系的定义;其次,提出了各基准立方镜和相机的装调要求;最后,确定了多相机集成装调流程,重点介绍了测绘相机的装调步骤。装调结果表明：各相机的光学传递函数〉0.2,畸变〈0.03%,测绘相机的空间几何关系满足要求,提出的集成装调技术有效地保证了测绘相机的空间几何关系。     

电脑芯片中的化学

针对电脑芯片的制造涉及到许多化学反应,介绍了单晶硅晶片的制备、外延、氧化、化学气相沉积、光刻蚀等化学反应过程。