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Aiming at the demand of electric cinch and release priority function of high-end vehicle door latches, a cam swing linkage and spring linkage combined mechanism is proposed, and a combined mechanism of double cam single swing linkage and spring four bar mechanism is constructed. Combined with the characteristics of limiting blocks, contact states, cam intermittent movement, profile abrupt change and other components, it can realize three motion modes of flexible and adaptive rolling, rigid pushing, avoiding and releasing, and switch among them. Embedded into the ratchet and pawl locking mechanism, the combined mechanism is transformed into electric cinch and release branches, corresponding to the three working conditions of the vehicle door latch: electric cinch, manual or power release and reset, and cinch branch reset. Based on the corresponding driving modes and motion boundary conditions, the compatible function of the cinch motion and the existing branches in the latch, the release priority function, and the half-lock release function in the case of the cinch pinch are studied and analyzed. The mechanism and the drive are embedded in the door latch for simulation, and the contact force between the release cam and the swing linkage, the swing linkage and the ratchet, and the ratchet and the paw are studied in all working conditions. The time of the mechanism to realize each function matches the design requirements of the vehicle door latch, the time of the electric cinch process is 420.97 ms, the reset time is 29.03 ms, and the manual release time is 622 ms.

【Objective】 To explore the spatio-temporal variation of fractional vegetation coverage (FVC) and its influencing factors in the Yiluo River basin from 2002 to 2021, middle and lower reaches of the Yellow River. 【Method】 In this research, the data of Landsat series satellites in 2002, 2007, 2011, 2016 and 2021 were selected and combined with pixel binary model to extract the vegetation coverage of this basin. The coefficient of variation and linear regression analysis method were used to reveal the spatial-temporal variation of vegetation coverage in this basin. The influence of natural factors and human activity factors on the temporal and spatial changes is analyzed. 【Result】 From 2002 to 2021, the source mountains in the Western and Southern parts of the basin are high FVC areas, while the FVC is low along the river course from West to East and in the central and Northern parts of the basin. The Eastern part is low FVC area. The proportion of high and relatively high FVC area was 65.29%. Medium FVC accounted for 17.66%, low and relatively low coverage accounted for 17.05%. The overall vegetation coverage was high, and the average FVC shows a decreasing trend, and then gradually increases. The FVC of the basin was basically stable in 44.14%, improved area in 32.25%, and slightly degraded area in 17.27%. The proportion of obvious degradation area was 6.34%. The influence degree of natural factors on FVC from high to low is elevation, temperature, precipitation and slope.The FVC increases with the increase of elevation, precipitation and slope, and decreases with the increase of temperature. The positive effect of human activities on FVC was slightly greater than the negative effect, which became an important factor promoting its growth trend. 【Conclusion】 From 2002 to 2021, the vegetation coverage in the Yiluo River Basin was relatively high and gradually increased. Elevation, temperature and precipitation were the main factors affecting its spatial distribution, and human activities promoted its increase.

In view of the demand for quick releasing of the side door latch of an automobile in an emergency, an emergency quick releasing mechanism based on spring linkage is proposed. Based on the singular configurations, the contact states of ratchet and pawl and the limit contact states, the variable topology and multiple motion modes of the emergency releasing branch chain under different working conditions are studied. The necessary conditions for emergency releasing are obtained by the static analysis. The feasibility of quick releasing of emergency releasing branch chain in door latch is verified by the Adams software simulation. The control variable method is used to study the releasing time and the consistency of the releasing time of the emergency branch chain. When the stiffness of the main spring is within 5-7 N/mm and the preload is within 75-85 N, the maximum energy storage position of the main spring has a small offset, which meets the consistency of the releasing time. The emergency quick releasing mechanism based on the spring linkage is embedded in the side door lock of the car, meeting the requirements of small releasing force, high priority and releasing time, and providing important theoretical basis and practical value for the design and performance optimization of emergency quick releasing branch chain.

Proliferation and migration of epidermal stem cells (EpSCs) are essential for epithelialization during skin wound healing. Angiopoietin-like 4 (ANGPTL4) has been reported to play an important role in wound healing, but the mechanisms involved are not fully understood. Here, we investigate the contribution of ANGPTL4 to full-thickness wound re-epithelialization and the underlying mechanisms using Angptl4-knockout mice. Immunohistochemical staining reveals that ANGPTL4 is significantly upregulated in the basal layer cells of the epidermis around the wound during cutaneous wound healing. ANGPTL4 deficiency impairs wound healing. H&E staining shows that ANGPTL4 deficiency significantly reduces the thickness, length and area of the regenerated epidermis postwounding. Immunohistochemical staining for markers of EpSCs (α6 integrin and β1 integrin) and cell proliferation (PCNA) shows that the number and proliferation of EpSCs in the basal layer of the epidermis are reduced in ANGPTL4-deficient mice. In vitro studies show that ANGPTL4 deficiency impedes EpSC proliferation, causes cell cycle arrest at the G1 phase and reduces the expressions of cyclins D1 and A2, which can be reversed by ANGPTL4 overexpression. ANGPTL4 deletion suppresses EpSC migration, which is also rescued by ANGPTL4 overexpression. Overexpression of ANGPTL4 in EpSCs accelerates cell proliferation and migration. Collectively, our results indicate that ANGPTL4 promotes EpSC proliferation by upregulating cyclins D1 and A2 expressions and accelerating the cell cycle transition from G1 to S phase and that ANGPTL4 promotes skin wound re-epithelialization by stimulating EpSC proliferation and migration. Our study reveals a novel mechanism underlying EpSC activation and re-epithelialization during cutaneous wound healing.

China has highly emphasized the research and operational application of numerical weather prediction. This paper determines the objective function parameters, such as CAPE and SRH, to apply an ensemble numerical prediction model in weather forecasting. Preprocessing and evaluating rainfall data is necessary to construct the WRF-ARW numerical weather prediction model. The WRF-ARW model is applied to simulate the weather forecasts in Henan Province, and the difficulties and challenges faced in the efficient implementation of the parameterized scheme are outlined. The WRFARW model’s prediction errors for the maximum rainfall and total rainfall in Henan Province range from 1.78%-13.51% and 0.16%-3.78%, respectively, which are significantly less than 15%, and the model is more predictive than the others. The raw data test set’s credibility ranges from 0.957 to 0.997, which is close to 1, indicating that the raw data collected in this paper are highly credible. The WRF-ARW model’s qualification rates for forecasting maximum rainfall and total rainfall are 86.7% and 93.3%, respectively, and its overall accuracy is grade B and grade A, respectively. The pass rates for the peak occurrence time of maximum rainfall and total rainfall were 93.3% and 86.7%, respectively, and the overall prediction accuracy was Grade A and Grade B, respectively. The WRF-ARW model is effective in weather forecasting throughout Henan Province. In summary, the WRF-ARW model is very effective in improving the efficiency of ensemble numerical weather prediction and parameterization schemes in Henan Province.

The influence of science and technology on cognitive change has a long history, which lead to forming philosophy of science and philosophy of technology respectively. The development of grain storage technology in China has gone through three stages: the initial exploration before the reform and opening up, the construction of intellingence in the past 10 years modern granaries in 30 years after the reform and opening up, and the creation of digital. The scientific and technological progress of grain storage in China has been witnessed by all, including building a modern granary with "four in one" new grain storage technology, to forming the world's largest grain and food networking with information technology, original multi-field coupling and bio-field theory, and realizing the dynamic supervision of grain reserves with grain cloud image scanning technology. In the new era, the political and economic situations have not changed significantly in the past century, and the new requirements of China's second centenary goal for food security and the impact of the fourth industrial revolution have made the trend of food science and technology becoming more and more intelligent. Based on the accumulation of scientific and technological achievements in grain storage practice for more than 40 years in China, combined with the team's research on multi-field coupling and bio-field theory of grain storage, dynamic supervision of cloud image of grain reserves, 5T information management of natural block chain for grain storage, and intelligent EAT window measurement and control methods for grain drying, this paper attempted to take the basic idea of "one divides into two, two divides into three, and three generates changes" on the basis of deconstructing the micro and macro ternary microstructure of grain storage system. Taking the joint driving of mechanism and data as the intelligent strategy, the granary philosophy is introduced to improve the recognition of existing scientific and technological achievements. The granary philosophy also guided the exploration of grain storage technology in the new era, and provided support for building a high-quality intelligent food system. The granary philosophy is a deep reflection on the practical situation of grain storage, and has certain universality, which originates from grain storage practice, but is not limited to grain storage practice.

The stored grain can be regarded as a complex ecosystem, which exist a complex multi-field coupling interaction among the abiotic factors, the biotic factors, and the surrounding environment. In this system, only a few parameters such as temperature can be accurately detected, which causes the system to operate like a “black box” to the outside world. To truly and accurately detect various grain pile parameters, and further study the multi-field coupling interaction in grain piles, a graphical detection system for multi-filed interaction in grain storage based on NMR has been developed. The system consists of an NMR imaging analyzer, a test grain bin, and a data acquisition and processing system, which can accurately detect the grain pile temperature, humidity, and moisture simultaneously, and intuitively and vividly present the cloud map of the temperature field, humidity field, and moisture field in the grain pile through the cloud map drawing software. In this system, the NMR imaging technology was applied to the research field of multi-field coupling interaction in grain piles for the first time, which can provide a new technical means to find out the complex coupling relationship of stored grain ecosystem and further confirm the correctness of relevant theoretical research. The development of this system will be helpful in deepening the theory of multi-field coupling and biological field of grain piles, developed by the industry.

The grain storage process could be affected by many aspects such as biological field and non biological field, which will lead to the phenomenon of heating, mildew, dewing and pest damage in the grain storage process. It is urgent to develop convenient, fast, multi-functional and high-precision on-site detection tools. According to the requirements of actual grain storage management, the multi-functional grain storage safety on-site rapid detection analyzer could calculate the stored grain moisture, water activity, absolute humidity, accumulated temperature, accumulated humidity, J/Q value and absolute water potential with models and algorithms on the basis of multi-point high-precision detection of temperature, humidity and CO2 concentration, and could graphically expresse the calculated results to assist in the determination of stored grain conditions such as safety, condensation, heat, mildew, etc, which will have mechanical ventilation operation parameter selection and intelligent control. The preliminary application of the instrument shows that it can provide effective technical support for granary management and has a good application prospect.

Artificial intelligence technology has shown incomparable advantages in solving traditional agricultural problems. At present, the determination of moisture content and grade of high moisture corn in grain purchase is still mainly based on artificial sensory detection. There are many problems such as heavy workload, low efficiency, poor repeatability, and strong subjectivity, which will cause the loss of grain quantity and quality, and this problems even affect the benefits of enterprises and farmers. Aiming at the technical difficulties in rapid detection of high moisture maize, this study obtains enlightenment from the experience of front line personnel in visual measurement of moisture. Based on mining the rich information in corn kernel images, a new bionic image rapid nondestructive measurement method using the mutual information entropy as the coupling degree evaluation index, were studied then a intelligent purchase grading system of high moisture corn were developed and tested. The test results show that on the basis of realization of the bionic intelligent algorithm of ‘watching moisture by machine’, the purchase of high moisture corn is a technical path worth exploring.

Hot air drying is the key link of bulk grain and agricultural product processing. Because of the adjustment of national environmental protection and energy utilization policies in the new era, it is required to research and develop the energy saving technology of hot air drying for agricultural product. The current research is mostly limited to practical work tracking and empirical design, and there are also numerical calculations by heat and mass transfer theory. However these approaches have some limitations. Physical simulation is an effective potential method. In the process of studying the condensation increasing efficiency and energy saving technology, this paper has developed a test system which can simulate the actual hot air drying recycling energy. It has multi-parameter adjustable, graphical display drying state, energy consumption monitoring and other functions, and it can also provide effective means to study energy saving technology of hot air drying of agricultural product. The corn drying test for this system showed that energy recycling energy-saving drying could save energy 32%~56% when compared with ordinary open hot air drying.

Research on process parameter optimization and process intelligent control is an important element in the design and development of grain drying equipment. Existing methods mostly use simulation, device experiments or field experiments to obtain data, which have large differences with the actual drying results or the experimental process is time-consuming and vulnerable to interference. In this study, with reference to the process and structure of large continuous grain drying production equipment, a continuous grain drying simulation experimental system was developed and designed, including grain feeding equipment, dryer main body, grain discharge equipment, waste heat recovery, condensing device, hot air equipment and measurement and control system, which can simulate the grain drying operation process. This system can also optimize the drying process parameters, and carry out indoor grain drying quality change law, energy consumption law and production efficiency. The system can be used as the first-line staff post. The system could be used as the pre-service training for the workers on the production line, the experimental teaching of related majors in universities and colleges and the experimental research system of scientific research institutions.

Due to the diversity of Chinese characters and the complexity of Chinese semantic expressions,Chinese spelling che-cking is still an important and challenging task.Existing solutions usually suffer from the inability to dig deeper into the text semantics and often learn the mapping relationship between incorrect and correct characters through pre-established external resources or heuristic rules when exploiting the unique similarity features of Chinese characters.This paper proposes an end-to-end Chinese spelling checking algorithm model BFMBERT(BiGRU-Fusion Mask BERT) that incorporates multi-feature embedding of Chinese characters.The model first uses a pre-training task combining confusion sets to make BERT learn Chinese spelling error knowledge.It then employs a bi-directional GRU network to capture the probability of error for each character in the text.Furthermore,it applies this probability to compute a fusion embedding incorporating semantic,pinyin,and glyph features of Chinese characters.Finally,it feeds this fusion embedding into a mask language model in BERT to predict correct characters.BFMBERT is evaluated on the SIGHAN 2015 benchmark dataset and achieves an F1 value of 82.2,outperforming other baseline models.

Currently, a variety of commercial software has been introduced from abroad into the oil & gas engineering design industry, which has a certain impact on the development cost and output process of the traditional engineering design industry. Hence, it is urgent to seek for high-efficiency application of the software. Besides, the domestic commercial process software is developed relatively slowly and not applied massively in the engineering design industry.So, the application status of foreign commercial process software was summarized systematically based on a variety of mainstream commercial software for relevant process design in the upstream-midstream and downstream projects of oil &gas engineering. The product characteristics, development trend and related impact on the industry were also expounded.Meanwhile, the product characteristics and development trend of domestic commercial process software were summarized,with comparative analysis on the advantages and disadvantages of the domestic commercial process software. On this basis, the application and efficiency improvement strategies were proposed for the foreign commercial process software,including the consideration and suggestions on the development of domestic commercial process software, so as to provide reference for the development, application and evolution of industrial process software for engineering design.

Aiming at the problems of low positioning accuracy and high computational complexity of the traditional location fingerprint algorithm, this paper proposes a single Light Emitting Diode (LED) indoor positioning algorithm based on Back Propagation Neural Network and Multiple Linear Regression (MLR). First, three horizontal PhotoDetectors (PD) are used at the receiver side to receive optical power, and the point to be measured is located at the center of the receivers. Then, according to the received optical power vector, the BP neural network is used to obtain the coarse location range of the point to be measured. Finally, the location range is used as a constraint, and multiple linear regression is used to achieve more accurate positioning of the point. The experimental results demonstrate that in an indoor space of 2.0 m × 2.0 m × 2.5 m, the average positioning error of the algorithm is 5.04 cm, and the average positioning time is 0.002 83 s. Compared with the traditional location fingerprint algorithm, the average positioning accuracy of the algorithm is improved by 41.53%, and the average positioning time is reduced by 56.60%, which achieves more accurate positioning under the requirement of lower computational complexity.

Paleogeomorphology is the surface morphology formed by the deposition of strata in the basin in historical period, which is greatly affected by the regional tectonic movement; however, the effect of basin paleogeomorphology on reservoir has been underexplored. This study documents the basin paleogeomorphic terrain features and their implications for the depositional processes and oil migration and accumulation in the Jiyuan area of the Ordos Basin. Stratigraphic classification is achieved through well logging data analysis. A seismic fine interpretation of the Triassic–Jurassic paleogeomorphology is conducted. Typical drilling core observations were utilized in a well section analysis of the strata at the top of the Yanchang formation sedimentary facies characteristics. Studies have shown that the Chang 1 subsection on top of the Triassic Yanchang formation in the Jiyuan area was eroded by an ancient Jurassic river, and the residual strata are primarily distributed in the Dingbian and Jiyuan plateaus. The Chang 1 reservoir in the Jiyuan area is dominated by a delta distributary channel sand body. The reservoir is concentrated in a high reservoir sand body structure position, and is controlled by a combination of structural and rock characteristics. This study suggests that the Indosinian movement in the late Triassic caused the entire basin to uplift and denudate, and the strata at the top of the Yanchang formation suffered from weathering and river erosion. The residual strata in the upper part of the Yanchang formation are controlled by the late Triassic–early Jurassic paleogeomorphology.

As a significant chromosomal structural abnormality, chromosomal inversion is closely related to male infertility. For inversion carriers, the interchromosomal effect explains male infertility, but its specific mechanism remains unclear. Additionally, inversion carriers with different chromosomes have different clinical manifestations. Therefore, genetic counseling is difficult in clinical practice. Herein, four male carriers of pericentric inversion in chromosome 6 have been described. Two patients showed asthenospermia, one showed azoospermia, and the wife of the remaining patient had recurrent miscarriages. Through a literature search, the association between the breakpoint of pericentric inversion in chromosome 6 and male fertility problems are also discussed in this study. Overall, important genes related to asthenospermia in chromosome 6p21 were found, which may be related to the clinical phenotype. These results suggest that physicians should focus on the breakpoints of inversion in genetic counseling.

In the implementation of robot motion control, complex kinematic computations consume too much central processing unit (CPU) time and affect the responsiveness of robot motion. To solve this problem, this paper proposes a parallel method for solving kinematic equations of articulated robots based on the coordinate rotation digital computer (CORDIC) algorithm. The method completes the fast calculation of the transcendental function based on the CORDIC algorithm, adopts the tree structure method to optimize the key computational paths of forward and inverse solutions, and designs a parallel pipeline to realize the low latency and high throughput of the kinematic equations. The experiments of the proposed method are validated based on the field-programmable gate array (FPGA) hardware experimental platform, and the experimental results demonstrate that the computational time to complete the entire kinematic equations is 4.68 μs, of which the computational time for the kinematic positive solution is 0.52 μs and the computational time for the kinematic inverse solution is 4.16 μs.

This paper aims to identify the impact of China-Pakistani economic corridor project bring the international trade, healthcare, self-efficacy, and social performance facility to Gilgit city, Pakistan. A questionnaire survey was carried out on the scholar presently studying at different universities in china. The 50% scholar estimation silk road enhanced, and 11% have no idea about the increasing of the healthcare opportunity in Gilgit. The 83% scholar estimation silk road improved Gilgit infrastructure. The 66% scholar estimated yes, 10% no, and 50% have no idea about the silk road brings peace and stability to Gilgit. The majority of respondents in the survey had a positive approach to the China–Pakistan Silk Road (CPSR). The results of the analysis show a better knowledge of the communication between the project and social media. This study will help china intensify its products to the middle east, africa, and europe. The (CPSR) is believed to create a shift in china's economic and political position in the world. in addition to strengthening the time-tested economic partnership between the two countries, the CPSR is expected to transform china's economic and political situation in the world.

Objective To investigate the diagnosis, treatment and prognosis of lymphoepithelial carcinoma of the parotid gland. Methods Data from 22 patients with parotid lymphoepithelial carcinoma from 2012 to 2019 were collected, and their clinical manifestations, imaging examinations, treatment methods and follow-up results were retrospectively analyzed. Results Among the 22 patients, 8 were males and 14 were females. The patients ranged from 26 to 61 years old, with a complaint duration ranging from 3 days to 18 years. One patient had multiple unilateral lumps in the parotid gland, and the other 21 patients had single unilateral lumps in the parotid gland. All patients underwent preoperative spiral CT examination. CT showed a soft tissue lump in the parotid tissue, the internal density shadow was not uniform, the CT value ranged from 26 to 81 Hu, and 15 patients presented elliptical lesions with clear boundaries. Seven patients presented nodular lesions, and the boundary was not clear. The diagnosis of all cases was ultimately based on pathological examination. Hematoxylin-eosin (HE) staining images showed active epithelial cell growth with atypia, mitotic figures could be seen, and abundant lymphocyte and plasma cell infiltration could be seen in the tumor stroma. All 22 patients received surgical treatment; 9 patients did not undergo cervical lymph node dissection. Twenty patients received adjuvant radiotherapy after surgery, and 10 of them received adjuvant chemotherapy at the same time. One patient only received chemotherapy after surgery, and one patient did not receive any other adjuvant therapy after surgery. All patients received follow-up visits. One patient died of liver metastasis 16 months after the operation, and the remaining patients survived without tumors for periods of 13 months to 8 years until the present. Conclusion Parotid lymphoepithelial carcinoma is a rare malignant tumor clinically. Pathology is still the gold standard for the diagnosis of lymphoepithelial carcinoma of the parotid gland. Radical resection of the tumor is the first choice of treatment. Selective neck lymph node dissection and postoperative adjuvant radiotherapy and chemotherapy can obtain better therapeutic effects according to clinical examination, imaging examination and neck conditions.

As an inherent characteristic of light, polarization plays important roles in information storage, display and even encryption. Metasurfaces, composed of specifically designed subwavelength units in a two-dimensional plane, offer a great convenience for polarization manipulation, yet improving their integrability and broadband fidelity remain significant challenges. Here, based on the combination of various subwavelength cross-nanofins (CNs), a new type of metasurface for multichannel hybrid polarization distribution in near-field is proposed. Sub-wavelength CN units with various waveplate (WP) functionalities, such as frequency-division multiplexing WP, half-WP and quarter-WP are implemented with high efficiency in broadband. High-resolution grayscale image encryption, multi-image storage and rapid polarization detection are demonstrated by encoding the WP pixels into single, double and four channels, respectively. All these applications possess good fidelity in an ultrabroad wavelength band from 1.2 to 1.9 µm, and the high degree of integrability, easy fabrication and multifunction make the CN-shaped WP pixels a promising candidate in optical device miniaturization, quantum applications and imaging technologies.

This paper proposes a modified third generation non-dominated sorting genetic algorithm (mNSGA-III) to overcome the poor convergence of third generation non-dominated sorting genetic algorithm (NSGA-III) in handling discrete topology optimization. It uses the mNSGA-III for the structural optimization of a body-in-white (BIW) welding production platform. It proposes an advanced extreme point selection to stabilize the normalization of populations. It constructs the finite element model of BIW welding production platform. Using discrete topology optimization, it treats the total mass, maximum stress and z-direction displacements of several nodes of platform as objective functions. It developed a discrete topology optimization program by using MATLAB interfaced the commercial finite element code MSC.Nastran. Finally, it selected the design with appropriate layout in view of stiffness and strength of the structure. The optimal design conforms to the design standards and the total mass reduces by 30.1%. The results show that mNSGA-III gets a more stable optimization process and easy to converge when solving the multi-objective discrete topology optimization problems. The proposed method provides an applicable method for the optimization of giant steel structures and has great values for practical engineering problem.

The contrast between the disruption of genome topology after cohesin loss and the lack of downstream gene expression changes instigates intense debates regarding the structure-function relationship between genome and gene regulation. Here, by analyzing transcriptome and chromatin accessibility at the single-cell level, we discover that, instead of dictating population-wide gene expression levels, cohesin supplies a general function to neutralize stochastic coexpression tendencies of cis-linked genes in single cells. Notably, cohesin loss induces widespread gene coactivation and chromatin co-opening tens of million bases apart in cis. Spatial genome and protein imaging reveals that cohesin prevents gene co-bursting along the chromosome and blocks spatial mixing of transcriptional hubs. Single-molecule imaging shows that cohesin confines the exploration of diverse enhancer and core promoter binding transcriptional regulators. Together, these results support that cohesin arranges nuclear topology to control gene coexpression in single cells.

CaO–MgO–Al2O3–SiO2 glass-ceramics with diopside as the main crystalline phase were prepared by melting blast furnace slag obtained from Baotou Iron and Steel Company. The effect of heat treatment on the crystallization behavior of glass-ceramics, containing a large proportion of melted blast furnace slag, was studied by means of differential thermal analysis and scanning electron microscopy. The optimum heat-treatment regime was obtained by orthogonal experimental results for glass-ceramics in which blast furnace slag comprised 70% of the composition and 1% Cr2O3 and 4% TiO2 were used as nucleating agents. The nucleation temperature was 750°C for 2.5 h and the crystallization temperature was 930°C for 1 h. Under this regime, the performance of the glass-ceramic was better than that of other groups in the orthogonal experiment.

The power-release function of the vehicle latch is the physical basis for passengers' non-physical operation mode to enter the vehicle and plays a vital role in the intelligent automatic door system. Aiming at the demand of dual branch chains cooperative drive of the electrical lock and the power release， also the non-interference between the multiple kinematic branch chains of the vehicle latch， a novel power release kinematic chain with the variable topological characteristic is constructed. Based on the synthesis theory of the topological structure for planar mechanism， the intermittent mechanism of incomplete gear is synthesized into the power release kinematic chain. The incidence matrix is used to study the topological structure state of the power release branch chain. Furthermore， through the physical prototype fabrication and function experiment of the novel vehicle latch， the feasibility of the power release vehicle latch is verified. This research provides a novel idea for the design of the kinematic chain of the vehicle intelligent latch.

[Objectives] The radiated noise caused by propeller-induced pressure fluctuations of SWATH ship is studied.[Methods] Due to the difference between the common load application ways and the actual situation,as well as the interaction between the two propellers,an acoustic-structure coupling numerical model of a whole SWATH ship was established. The radiated noise caused by propeller-induced pressure fluctuations was calculated using the ship model test results,and the influence of different load application ways and the phase difference between the excitation torque of two propellers was quantitatively analyzed.[Results] The results show that the radiated noise is mainly caused by the blade frequency component,which is related to the bending mode of the blade. The influence of different load application ways is remarkable. With regard to the actual load distribution,the results obtained by common load application ways such as concentrated force or uniformly distributed pressure are larger,and applying the concentrated force leads to the largest result. The phase difference between the excitation torque of two propellers also has a significant effect. The radiated noise is largest when the two propellers are in the same phase,and decreases gradually with the increase of phase difference,and the noise is smallest when the two propellers in the opposite phase.[Conclusions] The study in the paper can provide reference for prediction and control of radiated noise caused by propeller-induced pressure fluctuations for SWATH ship.

The COVID-19 pandemic has had enormous health and economic impacts, and it has halted the global tourism industry, forcing it to become more resilient. This study explored the resilience influencing factors in the tourism industry before and after the pandemic in China. Semi-structured interviews and questionnaires were used for this study. First, questionnaire-based interviews were conducted in February 2021 with 10 Chinese tourism enterprise managers, a thematic analysis based on the content of the interviews yielded six main themes. Using these six themes as indicators, a follow-up survey was conducted in May 2021 and May 2022 among 45 tourism enterprises in Sichuan Province to assess changes in their perceptions of the importance of these influencing factors. The importance of corporate social responsibility increased dramatically, psychological adaptability decreased slightly, and other factors increased slightly, according to the findings. These findings have implications for tourism enterprises recovering from major disasters.