Implication relationships are important factors affecting the rapid configuration design of complex product schemes. Aiming at improving the ability of extension configuration design of complex product schemes, the effective expression, mining, reasoning and reuse of information contained in the process of complex product scheme design were researched. The concept model of extension ontology, the information calculation model of implication system, the implication relationship mining model and the extension reuse calculation model based on extension ontology implication system in the process of extension design of large complex product schemes were analyzed. A complex product extension design model based on extension ontology implication system was proposed, and the implementation steps and framework of the corresponding model and algorithm were put forward. The model and algorithm were illustrated and validated by a specific design example. The results indicate that the model and algorithm are effective and feasible, which provides a theoretical and engineering support for the smooth implementation of extension design of complex product schemes.

The related literature of TRIZ from 2000 to 2019 is collected by CNKI as the research object, and the research status and evolution trend of TRIZ in China is analyzed by bibliometric method. With the help of CiteSpace visualization tool, the knowledge map is displayed, and the descriptive statistical characteristics, hot spots and evolution trend of the research field are analyzed. It is found that although TRIZ research in China started late, it has developed rapidly. From 2000 to 2019, it has experienced two stages: in-depth research and horizontal development. Based on the traditional application of TRIZ, the hot spots of TRIZ in China has gradually extended to non-engineering technology fields such as service innovation and knowledge innovation, and gradually integrated with new technologies. The future research trend will continue to deepen the application of TRIZ in non-engineering fields, and promote its software, intelligent and concise application mode, and further expand its application field and scope.

In view of the problem that the indoor dust content is too high due to the use of chalk in the traditional face-to-face classroom, Extenics and computer aided innovation technology based on the theory of the solution of inventive problems (TRIZ) are used to innovate the existing dust-free blackboard products. Searching and selecting the dust-free blackboard patent as the research object, using the patent evasion module of computer-aided Innovation Software goldfire to complete the function analysis, a function model is established, the problem function in the model judged, and the function information expressed with the extension basic element model. After determining the circumvention path and using the extension transformation method to evade the replace components, the circumvention model is obtained. Combined with TRIZ solution tool and the divergence tree, the solution is obtained and its feasibility judged. The application of this process can provide reference for other products to design around patent.

Consumer feedback is critical to market structure analysis. The determinate interactive behaviors with Bayesian inference are identified and the product-behavior involvement matrix built by examining the data of consumer behavioral stream which reflects the intention of consumers towards products. A K-means clustering algorithm and multidimensional scaling (MDS) method are utilized to segment and visualize the product market. It is found that Consumers’ Click and Tag into favorite set significantly influences the market share of products. The segmentation result reveals the dominant phenomenon of few products in the whole market, as well as the competition intensity among the products not only across brands, but within the same brand. Considering the influence of consumers, analyzing market structure with real-time behavioral feedback enables managers to adjust their market strategies on development or positioning of new and old products.

The security of blockchain technology, depending on the encryption algorithms based on the one-way mathematical calculation difficulty, is vulnerable to the attack under exponential acceleration of quantum computers. Although a series of anti-quantum attack blockchains have been proposed, they are often too expensive to build and are not conducive to popularization. In this regard, a quantum-encrypted blockchain based on delegated proof of stake (DPoS) extension is proposed. Comparing with the original quantum-secured blockchain proposed by Kiktenko, the number of quantum key distribution (QKD) channels needed to be built is reduced from $O({n}^{2})$ to $ O\left(n\right) $, and the maximum number of communication rounds required is reduced from $ n/3+1 $ to $ k/3+1 $. It significantly reduces the construction cost, and improves the operation efficiency and expansion ability.

In the actual stock market, short selling is an important investment vehicle. A multi-period fuzzy portfolio optimization problem with restricted short selling is studied. Firstly, regarding the returns of risky assets as trapezoidal fuzzy numbers, within the situation of short selling, a multi-period credibilistic mean-lower-semi-variance-skewness portfolio optimization model is constructed with the minimum expected return constraint for each period, bankruptcy control constraint and bound constraint. Then, a modified multiple particle swarm optimization is designed to solve the model. Finally, a numerical example is given with real stock data to illustrate the effectiveness of the proposed optimization model and algorithm.

Four schemes of image control points are investigated under the assistance of high-precision POS data to explore the optimal layout of image control points in the plain terrain that meets the standard tolerance requirements. The results show plane accuracies in the aerial triangulation of the four schemes are similar, but elevation accuracies are significantly different. POS data-assisted solution can significantly improve the elevation accuracy. Through a comparative analysis, it is found that image control points with the number of 10 baseline intervals and 4 airline intervals is the best optimal layout, when its plane accuracy can meet the requirements of 1∶500 scale mapping and elevation accuracy can meet the requirements of 1∶2000 scale mapping.

15 Landsat-8 OLI/TIRS and Landsat-5 TM images from 1995 to 2019 were used to retrieve the land surface temperature in Guangzhou by atmospheric correction and mono-window algorithm. According to the spatiotemporal analysis of the results, from 1995 to 2019, the area of Guangzhou's heat island began to be in a stable stage, then it showed a rapid growth trend from 2001 to 2014, and then decreased at a slow rate after 2014. The results show that the areas where the heat island effect has been alleviated are old urban areas, and the reasons for the change may be related to the relocation of industrial areas and the improvement of greening. The spatial distribution pattern of heat islands was agglomerated from the center, gradually spreading to the north-south direction and the east direction, and then evolved into a strip-shaped dominant, multi-center spatial distribution characteristic. Its changing trend was basically consistent with the urban development mode.

A hyperbolic tumor growth model with Robin free boundary is studied, which contains an elliptic partial differential equation describing the concentration of nutrients, an ordinary differential equation describing the radius of tumor and two hyperbolic equations describing the growth of tumor cells. In this paper, by applying the method of characteristic curves and the Banach fixed point theorem, the existence and uniqueness of the global solution of the model are proven. Finally, it is proven that while ${K_R} = 0$, $\mathop {\lim }\limits_{t \to \infty } R\left( t \right) = \infty$.

The electronic structure and optical properties of lanthanide doping ZnO are investigated by first-principles calculation. The formation energy of lanthanide doping in SL(single-layer)-ZnO structure that is lower than in bulk-ZnO structure. The magnetism of ZnO will change along with single lanthanide atom doping from nonmagnetic to ferromagnetic, which roots in orbital hybridization of 4f of lanthanide, O-2p and Zn-3p and-4s. Impurities level formed in CBM (conduction-band minimum) or VBM (valence-band maximum) along with lanthanide doped will reduce the band gap and improve the conductivity of materials. For Eu/La/Ce doping ZnO, new absorbing peak will be formed in infrared regions, and Eu/Ce-O_i double defects will obviously improve its optical properties.

Polyetheretherketone (PEEK) is a class of semi-crystalline polymer. Compared with traditional bone repair materials, PEEK possesses good biocompatibility, chemical stability, light transmittance and elastic modulus which is similar to that of normal human bone. Therefore it has been widely used in transplantation. However, the biological inertia of PEEK limits its clinical application. At now, the surface modification is an effective way to solve this problem. The current status of research and direction of development about PEEK surface modification methods in recent years are reviewed. And physical modification, chemical modification and coating modification are emphasized. The effects of different modification technologies on improving biocompatibility were analyzed. Finally, the problems are pointed out that need to be solved for PEEK surface modified bone graft material to continue to develop in the medical field. The body's reaction must be studied fully at every stage after the bone graft material was implanted in the body. And it is ensured that the surface treatment does not degrade or wear away normal tissues throughout the whole life cycle.

We studied the fluorescence spectrum changes after doping CsPbBr₃ with different amounts of Ga³⁺ by an improved one-pot hot-injection method, and photoluminescence quantum yield (PLQY) reached the highest when the molar ratio of Ga³⁺ and Pb²⁺ was 1∶1, which was 47% blue light. We successfully loaded Ga³⁺-doped perovskite quantum dots onto the cobalt borate crystal material, and found that the fluorescence intensity has no obvious quenching phenomenon for a long time, which enhances the stability of the perovskite quantum.

The in vitro susceptibility test was used to evaluate the activity of eugenol against Malassezia, and the interaction between eugenol and traditional antidandruff drugs was studied by the checkerboard microdilution method. The minimum inhibitory concentration (MIC) of eugenol was 312.50 μg/mL and the minimum fungicidal concentration was 625.00 μg/mL. Eugenol combined with ketoconazole showed a synergistic effect, and combined with zinc pyrithione (ZPT), climbazole, and piroctone olamine (OCT) respectively showed additive effects. Combined use can reduce the minimum effective concentration of each drug by 50%~75%. The toxicity of eugenol to keratinocytes was evaluated by MTT (3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromid) assay. The results showed that the IC₅₀ of eugenol was 320.93 mg/L, which is higher than that of traditional antidandruff agents. This indicated that eugenol has higher safety at the cellular level. The mechanism of eugenol against Malassezia was studied by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). It was found that eugenol achieves fungicidal ability by destroying cell wall and internal membrane structure of Malassezia. These results provided a theoretical basis for the application of eugenol in antidandruff products.

In this study, the tremella polysaccharide was extracted by ultrasonic-assisted hot-water extraction from Tremellafuciformis. The polysaccharide extraction rate was used as an indicator. The ultrasonic frequency, the ratio of extraction material to liquid, the extraction temperature, and the extraction time were the influencing factors. A single factor experiment was designed. A better extraction process was obtained through orthogonal experiments. By using the TRPV1 kit to detect the release level of microglial TRPV1, compared with the LPS control group, different concentrations of the Tremella polysaccharide group (62.5, 250, 1000 μg/mL) can be different to varying degrees Inhibition of TRPV1 release. It shows that Tremella polysaccharide has a good inhibitory effect on BV2 microglia inflammation.

Ti-6Al-4V titanium alloy was dry turned by uncoated and AlCrSiN coated carbide inserts at three cutting speeds. It was found that the cutting life of AlCrSiN coated inserts exceeds uncoated inserts at all three cutting speeds and meanwhile the three values of cutting force, cutting temperature and workpiece surface roughness are lower than that of uncoated tools, which shows that AlCrSiN coating can effectively protect the substrate and maintain the sharpness of the tool. During the cutting process, the cutting force of both tools increased first and then decreased, which is related to the lubricating oxides produced by the two tools at high temperatures. Both cutting temperature and workpiece roughness have a positive correlation with the wear of the flank, that is, as the wear of the flank increases, the temperature and roughness increase accordingly, and incidentally, the increase in temperature is also related to the increase in plastic deformation and heat in the first deformation zone of the rake face. In addition, the chip size, color, and sawtooth frequency produced by the two tools also prove that the AlCrSiN coated tool has lower wear rate and cutting temperature than the uncoated tool.

The rapid development of urbanization has formed complex diversified spatial layouts in urban-scale city blocks. This phenomenon has influenced the micro-climate characteristics of urban local areas. From the view of quantifying the effects of urban surface elements on local climate, this study proposes a new spatial characteristic indicator-based local climate zone dividing method by considering city blocks’ boundaries. This method, facing the city block unit, could better describe the refined spatial patterns of city block-scale local areas. This study takes the man-made ecological urban region-Guangzhou Higher Education Mega Center (GHEMC) and the typical central business district-Pearl River New Town (PRNT) as examples, and builds the LCZ distribution maps and the distribution atlas of building spatial pattern and underlying surface layout characteristic indicators in these two sample regions by using the proposed LCZ division method. Comparison results show that the GHEMC mainly consists of open middle-rise buildings while PRNT is mainly composed of compact high-rise buildings. Visualization expressions of urban regional LCZ spatial characteristic parameters would provide data basis and theoretical evidence for quantitative research of city block micro-climate distribution laws and climate-friendly ecological urban construction.