Search

Previous studies have demonstrated the beneficial impact of plants on the overall well-being of elderly individuals. However, there remains a gap in our understanding which specific plant species have a notable influence on the physical and mental health of the elderly population. Among the various woody ornamental plants used worldwide, crape myrtle (Lagerstroemia indica) holds a growing significance in the natural environment. This study aimed to investigate the physiological parameters (such as blood pressure, heart rate, blood oxygen saturation, and fingertip pulse) as well as psychological aspects (measured using positive and negative affect schedule scores and smile face scale) associated with crape myrtle observation activities. The finding revealed the following key points: 1) engaging in crape myrtle observation activities significantly enhanced the physical and mental wellbeing of elderly participants; 2) the impact of observing crape myrtle flowers differed notably from that of observing its leaves, with flower observation having a more positive effect on the physical and mental health of elderly individuals; and 3) the natural environment was found to exert an influence on the physical and mental health of elderly individuals through visual stimulation. Following the observation of crape myrtle, there was a significant decrease in the physiological indices of elderly individuals. Our findings offer valuable insights into the therapeutic benefits of crape myrtle observation activities and contributing evidence-based recommendations for future landscape design aimed at enhancing well-being. [ABSTRACT FROM AUTHOR]

Alkenes are versatile compounds that are readily available on a large scale from industry or through organic synthesis. The widespread occurrence of alkenes provides the continuous impetus for the development of catalytic asymmetric alkene hydrofunctionalizations, which enables expeditious construction of complex chiral molecules from readily available starting materials. Catalytic asymmetric hydrofunctionalization of internal alkenes presents a notable challenge, due to their low reactivity, many potential side reactions, and the simultaneous control of the regio-, diastereo-, and enantioselectivities.

Although progress has been made in enantioselective hydroboration of di- and trisubstituted alkenes over the past decades, enantioselective hydroboration of tetrasubstituted alkenes with high diastereo- and enantioselectivities continues as an unmet challenge since the 1950s due to its extremely low reactivity and the difficulties to simultaneously control the regio- and stereoselectivity of a tetrasubstituted alkene. Here, we report highly regio-, diastereo-, and enantioselective catalytic hydroboration of diverse acyclic tetrasubstituted alkenes. The delicate interplay of an electron-rich rhodium complex and coordination-assistance forms a highly adaptive catalyst that effectively overcomes the low reactivity and controls the stereoselectivity. The generality of the catalyst system is exemplified by its efficacy across various tetrasubstituted alkenes with diverse steric and electronic properties.

The control of chemo-, regio-, diastereo-, and enantioselectivity is a central theme in organic synthesis. The capability to obtain the full set of stereoisomers of a molecule would significantly enhance the efficiency for the synthesis of natural product analogues and creation of chiral compound libraries for drug discovery. Despite the tremendous progress achieved in the field of asymmetric synthesis in the past decades, the precise control of both relative and absolute configurations in catalyst-controlled reactions that create multiple stereocenters remains a significant synthetic challenge. We report here the development of a catalyst-controlled hydroboration with hitherto unattainable selectivity. The Rh-catalyzed hydroboration of α, β-unsaturated carbonyl compounds with pinacolborane proceeds with high levels of regio-, diastereo-, and enantioselectivities to provide a hydroboration product with two vicinal stereocenters. Through the appropriate choice of substrate geometry (Eor Z) and ligand enantiomer (Sor R), all the possible diastereoisomers are readily accessible. The boron-containing products underwent many stereospecific transformations, thus providing a strategy for collective stereodivergent synthesis of diverse valuable chiral building blocks.

Based on the principle of vegetation water supply index (VWSI), relative normalized difference vegetation index (RNDVI) and relative land surface temperature (RLST) are proposed, with which a modified vegetation water supply index (MVWSI) is constructed, i.e., MVWSI=RNDVIRLST2Compared with VWSI, MVWSI eliminates the difference caused by the spatial and temporal distribution of VWSI. MVWSI was applied to monitor drought over Sichuan and Chongqing, China in 2006, suggesting that MVWSI can demonstrate the whole process of drought from its emergence and development to its weakening and disappearance. The relative precipitation index (RPI) is used to examine the effectiveness of MVWSI. The examination result shows that MVWSI and RPI have high consistency in spatial distribution and in-site time series analysis. Compared with vegetation condition index (VCI), temperature condition index (TCI), vegetation temperature condition index (VTCI) and temperature vegetation drought index (TVDI), MVWSI is simpler in calculation and more stable hence more easily realized in application.

Inspired by concerns of the effects of a warming climate, drought variation and its impacts have gained much attention in China. Arguments about China's drought persist and little work has utilized agricultural drought survey area to evaluate the impact of natural drought on agriculture. Based on a newly revised self‐calibrating Palmer Drought Severity Index (PDSI) model driven with air‐relative‐humidity‐based two‐source (ARTS) E0(PDSIARTS; Yan et al., 2014), spatial and temporal variations of drought were analyzed for 1982–2011 in China, which indicates that there was nonsignificant change of drought over this interval but with an extreme drought event happened in 2000–2001. However, using air temperature (Ta)‐based Thornthwaite potential evaporation (EP_Th) and Penman‐Monteith potential evaporation (EP_PM) to drive the PDSI model, their corresponding PDSIThand PDSIPMall gave a significant drying trend for 1982–2011. This suggests that PDSI model was sensitive to EPparameterization in China. Annual drought‐covered area from agriculture survey was initially adopted to evaluate impact of PDSI drought on agriculture in China during 1982–2011. The results indicate that PDSIARTSdrought area (defined as PDSIARTS< −0.5) correlated well with the agriculture drought‐covered area and PDSIARTSsuccessfully detected the extreme agriculture drought in 2000–2001 during 1982–2011, i.e., climate factors dominated the interannual changes of agriculture drought area, while PDSIThand PDSIPMdrought areas had no relationship with the agriculture drought‐covered area and overestimated the uptrend of agriculture drought This study highlights the importance of coupling PDSI with drought survey data in evaluating the impact of natural drought on agriculture. Nonsignificant change of drought in China during 1982–2011 revealed by PDSIARTS modelPDSIARTS denoted‐natural drought dominated interannual changes of agricultural drought survey areaThornthwaite and Penman PET‐based PDSI overestimated drying trend for whole China including cropland

Visual simulation's fidelity is used to verify the similar degree of simulation system that simulates real word. How to improve the similar degree of visual simulation is the key way to meet the simulation performance. Based on the F-AHP method, this work establishes the evaluation model of visual simulation fidelity of bridge-type grab ship-unloader, giving determining method of evaluation indicators, establishing membership function of each indicator and determining the weight. Finally, the case study is taken to illustrate how to evaluate a specific visual simulation with the method proposed in this work, and the evaluation result shown the fidelity of the virtual scene we gave is not so well.

To ensure the quasi class rate of large container liner, the requirements of handlingcapacity and efficiency for handling equipment will be higher. Therefore, meeting the requirementof increasingly large-scale on container ship is an important factor on Quayside of Container Crane (QCC) selection proposal. Under the premise of meeting handlingcapacity and efficiency, it should consider the reliability,economy, advancement and other factors of handling equipment. In the foundation of analyses the technical parameters and cost factors on QCC selection proposal, this thesis gives a synthetic evaluation method of QCC selection proposal, including the choice of index system and weight determination, and it gives sensitivity analysis from different factors that affect the QCC selection scheme result. Be combined with cases, this thesis describes the synthetic evaluation method for selection proposal is practical.

To reason and reflect the mapping relation between physics damage and structure functions of military engineering, mechanism was established for damage assessment of component-based military engineering. From the model, simulation, evaluation point of view, the damage simulation and results assessment system was given about component-based military engineering, and the rough entropy model was erected about damage assessment. On the basis of component unit, value element, damage simulation samples, this model integrated the component unit’s Entropy value within the overall structure of the military engineering, and the rough entropy information from simulation damage samples, which gave the integrative index value about damage effect of military engineering. Case showed that rough entropy model could comprehensively reason and infer the valuing rule between the physical damage and the overall function.

The heavy quayside container crane is the key equipment of handling production in container terminal, because the general simulation system can not provide the detail information of the single crane unit during working process, this work proposed a novel method to visualize the working process of the crane. Analyzed the basic mechanisms and typical working condition, based on which, discussed the modeling method for working process visualization, and then gave the internal structure of 3D crane model. This work designed the control logic to drive the 3D graphic elements of the visualization system, implemented the working process visualization according to the working waiting list of the crane.

The 3D visualization technology is a kind of means and methods to achieve the human-computer interaction. Instead of the discrete objects in container terminal yard, the cargo in bulk terminal yard is always being a form with particle. This paper gives a method which integrates modeling manually and real-time reconstruction automatically to achieve 3D visualization of bulk terminal yard. Since to meet the requirement of real-time rendering and also decision data computing fast, this paper designs the data structure to describe the digital stockpile formed with a hierarchy relationship between surfaces, sections and space points, and also considers the closest distance as the main condition for searching and updating an old section, to visualize the working process in bucket terminal yard.

As to the problem that the assembly cycle and costs of quayside container crane always exceeds 40% of the entire production cycle and costs, improving the assembly efficiency becomes an important link to enhance the competence of port machinery manufacturing enterprises. In the product assembling cycle, virtual assembly can help to improve assembly quality and reduce the cost. Based on the physical structure of 45t quayside container crane, 3D components model were developed, the assembly hierarchy and modeling process were provided. The simulation analysis of assembly sequence was taken based on the CATIA DMU platform and virtual assembly animation was generated. The assembly interference detection results were analyzed to verify the part assembling ability, the whole disassembly and assembly process was displayed, which can help the assembly workers making visual analysis of fitting operation rationality.

3D visualization simulation is the important research method of port logistic production system, whereas the lack of uniform standard and interface of 3D simulation model, it is very difficult to share the simulation model resource, and which caused modeling repeatedly and developing efficiency lowly. Container terminal 3D simulation model repository should be considered as the key factor of solving the problems of developing low-efficiency and model no reuse of logistic system. This paper classified the model resources required by container terminal 3D simulation, explained the functions of container terminal 3D simulation model repository, and gave its framework. Finally, we discussed the key techniques to implement the container terminal 3D simulation model repository.

Heavy handling equipment is the key factor to improve the level of logistic service in container terminal. In order to solve the problem of information sharing in maintenance management, this paper integrates the equipment information which locates in different spatial location on the container terminal and analysis the traditional maintenance method, giving the construction and functional modules of maintenance system, which will reduce the cost of heavy container handling equipment maintenance and improves the operational efficiency of terminal.

With the further research of large container terminal machine going, promoting single equipment’s efficiency cannot greatly enhance the whole logistics service level of container terminal, thus considering the cooperation of each machine of container terminal from the macro view has become more and more important. The cooperative virtual environment uses distributed virtual reality technology as to build a platform that sharing status data and meeting human-computer interaction. Through analyzing the container’s operating process and combing the typical characteristics of handling machine, this paper proposed a new novel method for container terminal machine cooperation and mutual interaction of each cooperative unit in the virtual environment, so it can present the imbalanced state of production system in the operation process directly and help to make fast decisions.

The great leader and teacher Chairman Mao consistently attached importance to critically inheriting the legacy of history. In his brilliant article "The Role of the Chinese Communist Party in the National War" written in 1938, he called upon all Communists who could study — especially high-ranking Party cadres — to pay attention to studying Marxist-Leninist theory, the history of the Chinese nation and the current situation. He said, "No political party can possibly lead a great revolutionary movement to victory unless it possesses revolutionary theory and a knowledge of history and has a profound grasp of the practical movement."

In the mid-T'ang movement for the reform of literary style, literary form, and literary language, Liu Tsung-yüan (A.D. 773-819) made brilliant contributions. His travelogues, metaphorical satires, and miscellaneous other works are a precious heritage of Chinese literature. This has long been well known, but his important place in the history of the development of Chinese materialism and atheism, on the other hand, has long since been hidden in obscurity.

Wang Fu-chih (1619-1692), whose style name [tzu] was Erhnung, was a native of Hengyang; in the history of our country, he was a great materialist and patriot. In his later years he lived in Shih-ch'uan-shan in western Hunan, and scholars called him Ch'uan-shan hsien sheng [a title of respect, somewhat equivalent to Mister, Squire, or teacher]. This year "19621 marks the 270th anniversary of his death.