乡土建筑的高技化

乡土建筑的高技化是当代乡土建筑发展的一个趋势,如何将高技术与地域性建筑完美的结合是文章探讨的重点。首先提出了地域性建筑从"传统乡土"向"高技乡土"转化的必要性,接下来从3个方面分析讨论了乡土建筑高技化的若干种设计手法,最后得出将高新技术与传统建筑相结合已是当今地域性建筑设计的一种必然。

新型工业化背景下制造业数智化高技能人才培养现状和对策

当前,数智技术不断向各个产业部门渗透和赋能,推动传统产业生产方式向数字化、智能化变革。数智赋能的工业智能化是中国式现代化下新型工业化的核心,数智化人才则是核心里的核心要素。文章在分析数智化高技能人才发展现状的基础上,提出职业院校应当顺应数智化时代高技能人才需求,从高移培养定位、完善现代职教体系、跨界融合的课程体系、建设数智技能培养共同体、建设“数智工匠”产业学院、完善职业培训机制等方面培养适应新型工业化需求的数智化高技能人才,为数智人才技能发展提供有利支撑。

试论高技术建筑地域化的基本构成

高技术建筑地域化的基本构成主要有自然环境因素、地域文化因素和技术因素等。自然环境因素包括对自然环境的保护,对自然素材的利用等;地域文化因素包括对地域文化的把握,对地域历史传统的兼顾,以及对地域文化的创新;技术因素则要求在选择使用高新技术的同时,关注传统技术的使用,并促使适宜技术的回归。

试析高技术建筑地域化的动因

促使高技术建筑走向高技术建筑地域化的动因是多方面的,包括高技术建筑自身的局限性、可持续发展对建筑提出的新要求、全球文明与文化多元化的影响、高技术的相对性以及地域建筑理论的影响等。高技术建筑地域化是多种因素相互影响与作用的必然结果。

2003年高技术与资本化发展回顾——西南证券研发中心

2002年高技术与资本化发展回顾 ·2002高技术资本化的主要特点 ·形成的主要原因分析 ·思考与展望2002高技术资本化的主要特点 ·风险投资:外资将唱主角 ·上市公司投资:生物技术门前鞍马稀 ·境内IPO融资:企业多但规模小

现代办公楼创新设计研究——以江苏省安全生产科学研究院办公大楼建筑设计为例

为探寻现代办公建筑的创新设计,营造良好的办公条件,创造舒适的工作环境,提升员工的工作效率,并以江苏省安全生产科学研究院办公大楼方案设计为例,通过分析现代办公建筑智能化、生态化、功能复合化以及高技化等特征,提出办公建筑设计旨在以人为本,在创造舒适的办公环境的同时,更要处理好人与建筑、环境之间的关系,体现建筑可持续发展的理念。

Simplified High-yielding Cultivation Technology of Rice

[Objective] The aim was to select simplified high-yielding cultivation technology of rice. [Method] The research explored three methods of farmland prepara- tion, transplanting, and fertilization including shallow rotary tillage and deep ploughing, mechanical transplanting and hand transplanting, controlled-release fertilizer and quantitative fertilization in order to investigate effects of different treatment groups on rice characteristics, economic characteristics, as well as labor saving, yield increasing and profit improving. [Result] Rice increased by 596.4-809.55 kg/hm2, labor saving reached 120-135 per hm2, and profit improved in the range from 5 521.39 to 8 727.48 yuan/hm2 in the treatment groups by combinations of shallow rotary tillage, mechanical transplanting, and controlled-release fertilizer, of shallow rotary tillage, mechanical transplanting, and quantitative fertilization, and of deep ploughing, mechanical transplanting, and controlled release fertilizer. [Conclusion] The three models are of promising prospects in production.

A facile sulfur-assisted method to synthesize porous alveolate Fe/g-C3N4 catalysts with ultra-small cluster and atomically dispersed Fe sites

Heterogeneous catalysts with ultra-small clusters and atomically dispersed(USCAD)active sites have gained increasing attention in recent years.However,developing USCAD catalysts with high-density metal sites anchored in porous nanomaterials is still challenging.Here,through the template-free S-assisted pyrolysis of low-cost Fe-salts with melamine(MA),porous alveolate Fe/g-C3N4 catalysts with high-density(Fe loading up to 17.7 wt%)and increased USCAD Fe sites were synthesized.The presence of a certain amount of S species in the Fe-salts/MA system plays an important role in the formation of USCAD S-Fe-salt/CN catalysts;the S species act as a"sacrificial carrier"to increase the dispersion of Fe species through Fe-S coordination and generate porous alveolate structure by escaping in the form of SO2 during pyrolysis.The S-Fe-salt/CN catalysts exhibit greatly promoted activity and reusability for degrading various organic pollutants in advanced oxidation processes compared to the corresponding Fe-salt/CN catalysts,due to the promoted accessibility of USCAD Fe sites by the porous alveolate structure.This S-assisted method exhibits good feasibility in a large variety of S species(thiourea,S powder,and NH4SCN)and Fe salts,providing a new avenue for the low-cost and large-scale synthesis of high-density USCAD metal/g-C3N4 catalysts.

A randomized controlled trial of laparoscopic versus open cholecystectomy in patients with cirrhotic portal hypertension

AIM: To evaluate the characters, risks and benefits of laparoscopic cholecystectomy (LC) in cirrhotic portal hypertension (CPH) patients.METHODS: Altogether 80 patients with symptomatic gallbladder disease and CPH, including 41 Child class A,32 Child class B and 7 Child class C, were randomly divided into open cholecystectomy (OC) group (38 patients) and LC group (42 patients). The cohorts were well-matched for number, age, sex, Child classification and types of disease.Data of the two groups were collected and analyzed.RESULTS: In LC group, LC was successfully performed in 36 cases, and 2 patients were converted to OC for difficulty in managing bleeding under laparoscope and dense adhesion of Calot's triangle. The rate of conversion was 5.3%. The surgical duration was 62.6±15.2 min. The operative blood loss was 75.5±15.5 mL. The time to resume diet was 18.3±6.5 h. Seven postoperative complications occurred in five patients (13.2%). All patients were dismissed after an average of 4.6±2.4 d. In OC group, the operation time was 60.5±17.5 min. The operative blood loss was 112.5±23.5 mL. The time to resume diet was 44.2±10.5 h.Fifteen postoperative complications occurred in 12patients (30.0%). All patients were dismissed after an average of 7.5±3.5 d. There was no significant difference in operation time between OC and LC group. But LC offered several advantages over OC, including fewer blood loss and lower postoperative complication rate, shorter time to resume diet and shorter length of hospitalization in patients with CPH.CONCLUSION: Though LC for patients with CPH is difficult, it is feasible, relatively safe, and superior to OC.It is important to know the technical characters of the operation, and pay more attention to the meticulous perioperative managements.

Ultradurable fluorinated V_(2)AlC for peroxymonosulfate activation in organic pollutant degradation processes

Vanadium‐based catalysts are considered the most promising materials to replace cobalt‐based catalysts for the activation of peroxymonosulfate(PMS)to degrade organic pollutants.However,these traditional vanadium species easily leak out metal ions that can affect the environment,even though the of vanadium is much less than that of cobalt.Compared to other vanadium‐based cata‐lysts,e.g.,V_(2)O_(3),fluorinated V_(2)AlC shows a high and constant activity and reusability regarding PMS activation.Furthermore,it features extremely low ion leakage.Active oxygen species scavenging and electron spin resonance measurements reveal that the main reactive oxygen species was 1O_(2),which was induced by a two‐dimensional confinement effect.More importantly,for the real‐life application of tetracycline(TC)degradation,the introduction of fluorine changed the adsorption mode of TC over the catalyst,thereby changing the degradation path.The intermediate products were detected by liquid‐chromatography mass spectroscopy(LC‐MS),and a possible degradation path was proposed.The environmental impact test of the decomposition products showed that the toxicity of the degradation intermediates was greatly reduced.Therefore,the investigated ultradu‐rable catalyst material provides a basis for the practical application of advanced PMS oxidation technology.

Process Control and Optimization for Heterologous Protein Production by Methylotrophic Pichia pastoris

The methylotrophic yeast Pichia pastoris is a highly successful system for production of a variety of heterologous proteins due to its unique features/abilities for effective protein expression, and tremendous efforts have been made to increase heterologous protein productivity by P. pastoris in recent years. When new engineered yeast strains are constructed and are ready to use tot industrial protein production, process control and optimization techniques should be applied to improve the fermentation performance in the following aspects： （1） increase recombinant cell concentrations in fermentor to high density during growth phase; （2） effectively induce heterologous proteins by enhancing/stabilizing titers or concentrations of the proteins during induction phase; （3） decrease operation costs by relieving the working loads of heat-exchange and oxygen supply. This article reviews and discusses the key and commonly used techniques in heterologous protein production by P. pastoris, with the focus on optimizations of fermentation media and basic operation conditions, development of optimal glycerol feeding strategies for achieving high density cultivation of P. pastoris and effective heterologous protein induction methods by regulating specific growth rate, methanol concentration, temperatures, mixture ratio of multi-carbon substrates, etc. Metabolic analysis for recombinant protein production by P. pastoris is also introduced to interpret the mechanism of sub-optimal heterologous protein production and to explore further optimal expression methods.

High precision slope deformation monitoring model based on the GPS/Pseudolites technology in open-pit mine

As the number and geometric intensity of visual satellites are susceptible to large slopes in open-pit mines, we propose integration of GPS/Pseudolites (PLs) positioning technology which can increase the number of visible satellites, strengthen the geometric intensity of satellites and provide a precision solution for slope deformation monitoring. However, the un-modeled systematic errors are still the main limiting factors for high precision baseline solution. In order to eliminate the un-modeled systematic error, the Empirical Mode Decomposition (EMD) theory is employed. The multi-scale decomposition and reconstruction architecture are defined here on the basis of the EMD theory and the systematic error mitigation model is demonstrated as well. A standard of the scale selection for the systematic error elimination is given in terms of the mean of the accumulated standardized modes. Thereafter, the scheme of the GPS/PLs baseline solution based on the EMD is suggested. The simulation and experiment results show that the precision factors (DOP) are reduced greatly when PLs is located suitably. The proposed scheme dramatically improves the reliability of ambiguity resolution and the precision of baseline vector after systematic error being eliminated, and provides an effective model for high precision slope deformation monitoring in open-pit mine.

Treatment of Phenol Wastewater Using High Gravity Electrochemical Reactor with Multi-concentric Cylindrical Electrodes

A novel high gravity electrochemical reactor with multi-concentric cylindrical electrodes was used in the electrochemical treatment of 5 000 mg/L phenol-containing wastewater at a petrochemical plant, which can operate continuously and process in a large scale. The results show that the high gravity technology used in electrochemical treatment of phenol-containing wastewater can shorten the electrolysis time, decrease the electrolysis voltage, and reduce the energy consumption. The COD removal efficiency was high in the high-gravity field, and reached up to about 48%, which was about 2 times the value achieved in the normal gravity field at a processing capacity of 6 L, a high gravity factor of 80, a voltage of 12 V, an electrolysis time of 40 min, and a wastewater flowrate of 80 L/h.

Outage Probability Minimization for Low-Altitude UAV-Enabled Full-Duplex Mobile Relaying Systems

In this paper, a novel unmanned aerial vehicle(UAV)-enabled full duplex decode-and-forward(DF) technique is used in mobile relaying system. Compared with conventional static relaying, mobile relaying provides more degree of freedom for experiencing better channel conditions and further improving the system reliable performance. The source and relay transmit power as well as relay trajectory are jointly optimized for sum outage probability minimization in mobile relaying system. Due to the non-convex nature of the original problem, block coordinate decent optimization techniques are employed to decompose it into two sub-problems, which leads to an efficient iterative algorithm. Specifically, for the pre-determined relay trajectory, the optimal transmit power of source and relay are obtained by solving Karush-Kuhn-Tucker(KKT) conditions. For the given source/relay power allocation, the optimal UAV trajectory is obtained by solving dual problem. Based on the two steps, an iterative algorithm is proposed to jointly optimize source/relay power allocation and UAV trajectory alternately. Numerical results show the performance gain of our proposed scheme.

Preparation of solid medium for use in separation with gas-solid fluidized beds

The highly-efficient dry separation technique using a gas-solid fluidized bed is very beneficial for increasing coal grade and optimizing the utilization of coal resources.The size distribution of the solid medium(e.g.,magnetite powder) used in this technique is one of key factors that influences fluidization and separation performance.It is,therefore,urgent to prepare medium in a way that operates at low cost and high efficiency.Grinding experiments were performed using a planetary ball mill equipped with a frequency converter.The effect of fed mass,rotation frequency of the mill,grinding time and the ball-size ratio on grinding performance was investigated.The grinding parameters were optimized by numerical calculations using Artificial Neural Network(ANN) in Matlab.A regression equation for predicting the yield of the desired product(i.e.,0.3～0.15 mm magnetite powder) is proposed.The maximum yield of 0.3～0.15 mm particles was 47.24%.This lays a foundation for the industrial-scale production of the solid medium required for separation with a magnetite-powder fluidized bed.

Technological optimization of fully mechanized caving mining face with large mining heights

Fully mechanized cave mining with large mining height is a new mining method, due to its large mining thickness and lower roadway excavation, the technology has been widely used in China＇s thick seam mining. In order to improve the top-coal recovery ratio of fully mechanized cave mining with large mining height, a study was conducted on optimizing the caving process, based on the mechanized caving face 1302N in Longgu Coal Mine. This was achieved by improving the PFC numerical calculation methods, and establishing a more accurate model system. On this basis, the recovery ratio of the top coal in different drawing intervals and technologies was investigated in order to achieve a reasonable caving process. The top-coal tracking system was used for practical surveying of the recovery ratio of top coal.

The Teaching Practice Exploration from the Science and Technology English to Academic English of University in Digital Environment

The globalization development of science and technology makes academic English education in Chinese universities become a trend, and the establishment and application of digital teaching environment also provides an efficient technical support for the teaching and practice of Academic English. Through its own characteristics and Academic English teaching requirements analysis, understand the function and role of digital environment in academic English teaching and trying to propose effective strategies for Academic English Teaching Practice Exploration.

Optimization and competition promotion of industrial structure in Blue Shandong Peninsula Economic Zone

Blue economic zone is a typical regional economic mode,which is specially characterized by marine economy and has multiple economic types coexisting and interacting through integrating marine and land resources.With the continuous progress of science and technology,marine economy as a strategy to promote economic development is approved in many countries.The Blue Shandong Peninsula Economic Zone(BSPEZ) reflects the local demands of economic development,and its upgrading and enhancing competitiveness of the industrial structure is also of obvious significance for enhancement of the development of eastern China and the national marine economy.This paper thinks that the BSPEZ has many advantages,such as unique marine economy,growing high-tech industries,more and more mature industrial system,advancing technological innovation,and outstanding big enterprises,large projects and regional bright brands,but it is also facing problems of low industry cluster,similar industrial structure with each other,still weak technological innovation.So we put forwards the basic approaches to upgrade and enhance the industrial structure:transforming and upgrading the traditional marine industries with advantages,accelerating the development of new marine industries and high-tech industries,integrating marine and land industry,and promoting the rational system arrangements.

Discussion on Existing Problems and the Development Trend of Electrical Automation Monitoring System

With the continuous improvement of industrial automation in our country and the use of high technology, promoted the scientific content of traditional industry. The development of electric automation control system inevitably turn towards a systematic, comprehensive development direction. This article first analyze the present problems in electrical automation monitoring system, analyzes its future development trends, so as to provide some reference for the effective application of electrical automation in the future monitoring system, fundamentally realize the resources sharing.

Study on the Establishment of the Synchronization Mechanism for R&D and Standardization in Shenzhen High-Tech Enterprises

The paper analyses the advantages of Shenzhen high-tech enterprises to establish the synchronization mechanism for R＆D and standardization based on the characteristics of Shenzhen high-tech industries,to provide some guidance, the paper provides some key points to establish the synchronization mechanism of R＆D. and standardization for high-tech enterprises.