Employment and development levels in rural areas of the Russian Federation

The development of agro-industrial complex is important for ensuring national food security and national health.The development of rural areas is subject to the development of agriculture and local infrastructure,as well as the availability of various services.This study selected 15 indicators in 2021 to analyze the employment and development levels in rural areas of 71 regions of the Russian Federation using the analytical grouping method.The results indicated that 20 regions(Group 1)had the highest percentage of rural population(33.10%).The percentage of population engaged in agriculture had the highest value(12.40%)in 31 regions(Group 2).Moreover,20 regions(Group 3)had the highest investments in fixed assets at the expense of municipal budget(11.80 USD/person).Increasing the investments in fixed assets carried out from the budget of the municipality can improve the employment level in rural areas.Then,we used cluster analysis to divide 14 regions of the Volga Federal District in the Russian Federation into 3 clusters.Cluster 1 covered Kirov Region and Republic of Mari El;Cluster 2 included Ulyanovsk Region,Saratov Region,Nizhny Novgorod Region,Perm Territory,Orenburg Region,Chuvash Region,and Republic of Mordovia;and Cluster 3 contained Republic of Tatarstan,Samara Region,Udmurtian Republic,Penza Region,and Republic of Bashkortostan.Results indicated that the 2 regions of Cluster 1 need to increase the availability of resources and natural gas and improve the investment attractiveness of rural areas.The 7 regions of Cluster 2 needed to develop infrastructure,public services,and agricultural production.We found the highest employment level in rural areas,the largest investments in fixed assets at the expense of municipal budget,the largest residential building area per 10,000 persons,and the largest individual residential building area in the 5 regions of Cluster 3.This study makes it possible to draw up a comprehensive regional development program and proves the need for the development of rural areas,which is especially important for the sustainable development of the Russian Federation.

TUMOR NECROSIS FACTOR－ALPHA SERUM LEVELS AND IN VITRO PRODUCTION IN PATIENTS WITH HUMAN IMMUNODEFICIENCY VIRUS（HIV） INFECTION

Patients with AIDS(Acquired Immunodeficiency Srudrome) have immunoldgic abnormalities resulting from functional defects in HIV(Human Immunodeficiency Virus)-infected CD4+lymphocytes and monocytes. Tumor necrosis factor-alpha(TNF-α)is known to mediate cachexcia.Todetermine if TNF is responsible for 'wasting syndrome' in AIDS.we studied serum levels and in vitro production of TNF-alpha in 21 HIV-seropositive men(10 AIDS,2 ARC, 9 HIV+)and 8 HIV seronreative controls.Both a bloassay and TNF-specific ELISA were used.All patiend except onebad undctectable levels of serum TNF. while control sera contained 4.2±2.5μg/L of TNF,Peripheral blood mononuclear cell(PBMNC)was tested for spontaneous,LPS-induced or PHA and PMA-induced TNF production at different times in culture(24-72h).Patients cells Produced significantlyless TNF than normal PBMNC under all experimental conditions:e.g,18-45μg/L in conttols vs.0.4～13μg/L in patients(P<0.001)at 72 hours using PHA and PMA as activators.Cell viabilitywas 85% in all cultures.No significant differences in TNF release were detected between AIDS patients with cachexia or opportunistic infectious and other HIV-seropositive men.This study showedthat most HIV-infected persons had no dctectable serum TNF-αand that their PBMNC produced subnormal quantities of this cytoklne in vitro,suggesting that TNF is not involved in the pathogenesis ofthe cacbexia associated with AIDS.

Effects of Crude Protein Level of Concentrate Supplement on Production Performance and Serum Biochemical Parameters in Post-fattening Hainan Yellow Cattle

[Objective]The paper was to investigate the effects of crude protein level of concentrate supplement on production performance and serum biochemical parameters of post-fattening Hainan Yellow Cattle.[Method]Twelve Hainan Yellow Cattles with the same genetic backgrounds and similar initial weight of(168.13±0.55)kg were randomly divided into three treatments.Cattle were fed with concentrate supplement containing different levels of crude protein.The trial lasted 60 d.[Result]The daily gain of 17.56%crude protein group was significantly higher than those of 15.55%and 13.56%crude protein groups(P<0.05),and the gross profit of 17.56%crude protein group was markedly higher than that of 13.56%crude protein group(P<0.05),but the feed gain ratio of 17.56%crude protein group was significantly lower than that of 13.56%crude protein group(P<0.05).Compared with 15.55%and 13.56%crude protein groups,the serum total protein content markedly increased(P<0.05),but the urea nitrogen level significantly decreased(P<0.05).[Conclusion]When crude protein level of concentrate supplement was 17.56%,post-fattening Hainan Yellow Cattle could obtain better production performance.

Cassava Production in NigeriamAn Application of Mechanization Levels

Cassava （Manihot esculenta Crantz） is globally known for its versatility. Its demand in the global market has increased in recent times. Many scholars have opined that the development of this root crop will boost rural economy especially in developing economies. This study investigates the production of cassava in Nigeria using different mechanization levels, which include： Hand Tools Technology （HTT）, Draught Animal Technology （DAT） and Engine Powered Technology （EPT）. These levels are classified into, low level mechanization, fair level mechanization and high level mechanization. The results show that the level of mechanization was high, only in land preparation while spraying, stem-cutting and weeding have low mechanization level. This shows that there are many unacceptable machines and suggests that efforts should be made to encourage cassava production considering the high economic, social and medical importance.

Production and Detection of Ultracold Ground State 85Rb133Cs Molecules in the Lowest Vibrational Level by Short-Range Photoassociation

We investigate the production of ultracold ground state x^1∑7＋（u = 0） RbCs molecules in the lowest vibrational level via short-range photoassociation followed by spontaneous emission. The starting point is the laser cooled 85Rb and laa cs atoms in a dual species, forced dark magneto-optical trap. The special intermediate level （5）O＋ （u = 10） correlated to the （2）311 electric state is achieved by the photoassociation process. The formed ground state X1∑＋ （u = 0） molecule is resonantly excited to the 2111 intermediate state by a 651 nm pulse laser and is ionized by a 532nm pulse laser and then detected by the time-of-flight mass spectrum. Saturation of the photoionization spectroscopy at large ionization laser energy is observed and the ionization efficiency is obtained from the fitting. The production of ultracold ground state 85Rblaacs molecules is facilitative for the further research about the manipulation of ultracold molecules in the rovibrational ground state.

A Production Inventory Model of Constant Production Rate and Demand of Level Dependent Linear Trend

The proposed model considers the products with finite shelf-life which causes a small amount of decay. The market demand is assumed to be level dependent and in a linear form. The model has also considered the constant production rate which stops attaining a desired level of inventories and that is the highest level of inventories. Production starts with a buffer stock and without any sort of backlogs. Due to the market demand and product’s decay, the inventory reduces to the level of buffer stock where again the production cycle starts. With a numerical search procedure the proof of the proposed model has been shown. The objective of the model is to obtain the total average optimum inventory cost and optimum ordering cycle.

Annaul Oil Production Level Reaches to 8 Million Tons in Sudan

TheSudan1/2/4blockhaveproducedoilontheincrease.OnOctober31.1999.thedailyoilproductionisupto165thousandbarrels.ItisestimatedthattheSudanl/2/4blockhavebeenbuiltup&milliontonsofannualoilproductionlevel.Thedailypipelinetransportationvolumehasalsoincreedf...

不同粗蛋白质水平对白王种鸽繁殖性能和乳鸽生长性能的影响

试验旨在探究“2+2”生产模式下不同粗蛋白质水平对白王种鸽繁殖性能和乳鸽生长性能的影响。试验选取产蛋性能相近的300日龄健康种鸽168对,随机分为4组,每组7个重复,每个重复6对种鸽,每对种鸽哺育2只乳鸽。试验Ⅰ组、Ⅱ组、Ⅲ组和Ⅳ组分别饲喂粗蛋白质水平为13.43%、15.04%、16.64%和18.25%的饲粮。试验期46 d,其中孵化期18 d (1~18 d),哺乳期28 d (19~46 d)。结果显示,试验Ⅱ组、Ⅲ组产蛋间隔显著低于试验Ⅰ组(P<0.05),试验Ⅲ组种蛋受精率显著高于试验Ⅰ组、Ⅳ组(P<0.05),试验Ⅲ组入孵蛋孵化率极显著高于试验Ⅰ组、Ⅱ组、Ⅳ组(P<0.01)。试验Ⅲ组乳鸽28日龄体重显著高于试验Ⅰ组(P<0.05),乳鸽屠宰率极显著高于试验Ⅰ组(P<0.01),乳鸽胸肌率显著高于试验Ⅰ组、Ⅱ组、Ⅳ组(P<0.05)。试验Ⅱ组、Ⅲ组、Ⅳ组窝料重比1极显著低于试验Ⅰ组(P<0.01)。研究表明,不同粗蛋白质水平影响了种鸽的繁殖性能、乳鸽的生长性能以及窝料重比,在“2+2”生产模式下,建议白王种鸽饲粮适宜粗蛋白质水平为16.64%。

高等教育强国建设的中国道路

高等教育强国建设是科技强国建设的基础性保障,是人才强国建设的关键性支撑,对中国式现代化建设具有突出的战略意义。推进高等教育强国高质量建设需要厘清中国式现代化引领高等教育强国建设的逻辑谱系,探明符合中国国情与现代化共同特征的强国建设路径;梳理高等教育强国建设的发展机理,增强高等教育强国建设的使命感和紧迫感;深化高等教育改革,回应新时代高等教育强国建设对新质生产力的迫切需要;明晰高水平科技自立自强支撑高等教育强国建设的核心要义,实现科技创新层级与能级的双跃升;以“两个大局”的时代理念作为高等教育高质量发展的时空坐标,厘清高等教育强国建设的行动逻辑。此外,在高等教育强国建设的关键阶段,我国必须以教育评价改革为抓手,破除制约高等教育强国建设的障碍,进而推动高等教育体系实现结构性变革、系统性重塑。

高水平社会主义市场经济赋能新质生产力的“理”与“路”

新质生产力是对马克思社会劳动生产力理论的继承与发展,突出了创新的主导作用、新发展格局的时代背景、关键核心技术的支撑性作用。高水平社会主义市场经济体制作为孕育新质生产力的新型生产关系,包含了“两个毫不动摇”的所有制结构、“有效市场与有为政府相统一”的资源配置方式、“共同富裕”的分配关系。“两个毫不动摇”既确保了新型生产要素的开发与人民的需要一致性,又优化了产业结构。“有效市场与有为政府”的统一,确保了新型生产要素的配置符合价值规律的要求。以“共同富裕”为导向的分配方式,激发了科技创新与新型生产要素的活力。高水平社会主义市场经济实现了社会主义制度优势与市场经济优势的统一,整合了国家、政府、社会、企业等多方面的力量,开辟了新质生产力发展的实践进路。

战略差异度、技术创新与企业全要素生产率——来自A股上市公司的经验证据

战略差异度对企业的影响是学术界关注的重要问题,而企业能否通过加大战略差异度进而提升全要素生产率为研究企业战略决策方面提供了不同的切入点。采用2009-2020年沪深A股上市公司的数据样本,实证检验了战略差异度对企业全要素生产率的影响。研究结果表明,战略差异度对企业全要素生产率起到显著的正向作用,技术创新在战略差异度影响企业全要素生产率的传导路径上存在中介效应。进一步研究发现,高行业竞争水平、高信息透明度和低融资约束企业的战略差异度越大对全要素生产率的正向作用越显著。研究丰富了全要素生产率的相关文献,并为其提供了研究的新视角。同时有助于企业利益相关者理解战略决策的经济后果,对指导和促进企业进行战略变革及获取竞争优势提供理论参考。

基于产教融合的机械专业三层次三维度实践教学体系构建与实践

产教融合将教育链、人才链与产业链、创新链有机衔接,培养面向产业的优质人才,具有深远的现实意义。但是实施过程中,教学、人才、产业以及创新等多种元素和维度发挥的体制机制问题并不十分通畅,往往没有形成长效机制。该文基于浙大宁波理工学院机电与能源工程学院的产教融合实践教学体系建设和实施实践,提出基于产教融合平台的三层次三维度有机融合的机械专业工程实践能力培养模式,将工程实践教学资源拓展为基础实践、产业实践、“双创”实践三个层次,学生、教师、雇主三个维度共同参与、共同评价实践教学效果,建立一套行之有效的运行机制,循环迭代、立体驱动学生工程实践能力的持续提升。建设成效显著,示范作用明显,吸引诸多企业踊跃参与。该文可为地方院校工科类专业开展产教融合的教学实践提供一种比较可行的实施路径。

中国新质生产力的发展水平和演进趋势

新质生产力的测算是研究新质生产力发展水平的基础,但当前关于新质生产力的评价指标体系和测度方法尚处于探索阶段。鉴于新质生产力是质和量的统一、能力和效率的统一、现实性和可比性的统一,依据生产力理论,结合高质量发展的现实要求,以及新质生产力在科技创新、要素提升、生产组织等方面的特征,系统分析新质生产力的本质要求、构成要素、实现途径、培育载体和支撑环境,在此基础上构建包括技术、要素、数字、产业和环境五维度的指标体系,对中国30个省份2022—2022年的新质生产力发展水平进行测度,并分析其发展格局和演进趋势。结果表明:30个省份新质生产力发展水平增长较快,但区域差异、经济带差异、城市差异明显;要素生产力保持较高水平,数字生产力和创新生产力加快发展,绿色生产力和产业生产力成为发展的短板。其中,从区域格局来看,东部高于30个省份的平均水平,中西部和东北地区低于30个省份的平均水平;从经济格局来看,长江经济带最高,其次是泛珠三角,而丝绸之路经济带低于30个省份的平均水平;从城市格局来看,三大城市群从高到低依次为珠三角、长三角、京津冀,并且均高于30个省份的平均水平。

关于风景园林专业学位与知识体系的思考

【目的】中国风景园林教育事业进入新的发展阶段,在专业学位背景下,风景园林知识体系亟待梳理与反思。【方法/过程】基于专业学位教育特点,剖析国家政策、社会需求,重新系统认知风景园林专业学位:从培养目标、知识类型、知识层级与知识结构4个方面探讨风景园林专业学位与知识体系的内涵及发展方向。现代风景园林专业人才培养的核心在于对实践智慧与能力的培养,专业知识类型势必从过去以经验知识为主体转变为以科学知识与规律为主体。科学、艺术与技术3种类型知识的融合是专业发展与人才培养的基础。学士、硕士与博士三级人才培养模式体现出风景园林专业知识的层级属性,据此处理好专业知识体系中内涵与外延的结构关系是推动专业发展的根本问题。【结果/结论】面对风景园林专业乃至思维范式的革新,应按照专业知识生产与组构的特定规律,探索风景园林专业未来可持续发展的有效路径。

基于遗传算法的划分序乘积空间问题求解层选择

划分序乘积空间作为一种新的粒计算模型,可以从多个视角和多个层次对问题进行描述和求解.其解空间是由多个问题求解层组成的格结构,其中每个问题求解层由多个单层次视角构成.如何在划分序乘积空间中选择问题求解层是一个NP难问题.为此,提出一种两阶段自适应遗传算法TSAGA(two stage adaptive genetic algorithm)来寻找问题求解层.首先,采用实数编码对问题求解层进行编码,然后根据问题求解层的分类精度和粒度定义适应度函数.算法第1阶段基于经典遗传算法,预选出一些优秀问题求解层作为第2阶段初始种群的一部分,从而优化解空间.算法第2阶段,提出随当前种群进化迭代次数动态变化的自适应选择算子、自适应交叉算子以及自适应大变异算子,从而在优化的解空间中进一步选择问题求解层.实验结果证明了所提方法的有效性.

不确定环境下预制构件生产鲁棒性调度研究

在确定了预制构件方生产工艺和资源约束情况的基础上,分析了预制构件生产调度计划对鲁棒值的影响;基于关键链技术制定了考虑二次资源冲突的集中缓冲进度计划,构建了以预制构件生产完工时间最短和鲁棒值最大为目标函数的双层规划模型,并通过嵌套式遗传算法对该模型进行求解。实证结果表明:基于该模型得出的调度计划鲁棒值最大且在面对不确定环境时更为稳定。

社会网络嵌入、风险承担水平与科技创业绩效——产品市场竞争视角

社会网络嵌入有助于提高科技创业企业资源获取、整合与配置能力,提升风险承担水平,进而促进科技创业绩效提升,但该过程受到产品市场竞争环境的影响。基于网络嵌入和资源配置理论,选取创业板企业2010—2021年非平衡面板数据,探究社会网络嵌入、风险承担水平与科技创业绩效间的关系以及产品市场竞争在该关系间的调节作用。研究发现:①社会网络嵌入对科技创业绩效具有正向影响,风险承担水平在社会网络嵌入和科技创业绩效正向关系中发挥积极中介作用,产品市场竞争强度对风险承担水平和科技创业绩效关系具有负向调节作用,产品市场竞争地位对风险承担水平和科技创业绩效关系具有正向调节作用;②社会网络嵌入对科技创业绩效的影响存在显著地区经济发展水平和企业所有制异质性,经济发展水平较低地区社会网络嵌入更能促进科技创业绩效提升,社会网络嵌入对非国有企业科技创业绩效的提升作用更显著。据此,提出深化企业交流合作、提高企业风险承担水平、广泛进行市场调研、加大研发投入强度等建议。

新型工业化助推新质生产力发展的实现路径研究——来自我国省级面板的经验证据

本文使用熵值法测度了新质生产力和新型工业化发展水平,考察了新型工业化促进新质生成力发展的途径。实证结果表明:(1)我国新质生产力总体得分显示出稳定增长的态势,这种增长趋势凸显了技术进步和产业升级在推动经济发展中的重要作用。(2)新型工业化能够显著提升新质生产力水平,其影响渠道包括提升研发强度和数字基础设施水平。(3)异质性检验结果表明交通基础设施更为完善的地区发展也较为成熟,其新质生产力受到新型工业化的影响相对较少,同时人均工资水平和发展水平较高的省份,其新质生产力受到新型工业化的影响效果更为明显。本研究还深入分析了我国近年来新型工业化及新质生产力的发展状况,并通过实证研究为提高新型工业化水平以促进新质生产力发展提供了依据。

地方保护政策对中国新能源汽车市场推广的影响分析

加快建设全国统一大市场对推动中国新能源汽车产业发展具有重要意义,而各地频发的地方保护现象却成为阻碍新能源汽车市场推广的主要因素。以2010—2021年中国28个省(市、区)新能源汽车推广数量的面板数据作为研究样本,分析了地方保护政策对新能源汽车市场规模和市场占比的影响,以及产品市场发育程度在其中的调节和门槛效应。研究结果表明,地方保护政策对新能源汽车市场规模扩大和市场占比提升均有显著的抑制作用,产品市场发育程度在该影响过程中具有调节性作用,地方保护政策对市场规模的作用受到产品市场发育程度单一门槛效应的影响,而对市场占比的作用则受双重门槛效应的影响,呈现出先促进后抑制的倒“U”型特征。进一步研究显示,地方保护政策通过加深能源市场分割阻碍了新能源汽车市场推广。区域异质性表明,东部地区的地方保护政策对新能源汽车市场推广有显著的抑制作用,而中西部地区的保护政策则有助于市场规模的扩大;在有新能源汽车上市企业母公司的地区,地方保护政策的抑制作用更为明显;而在没有此类企业的地区,其抑制作用相对较弱。研究结论为打破中国新能源汽车产业中的地方保护主义、推动产业可持续发展提供了决策参考。

计及电制氢和碳捕集的园区综合能源系统动态规划

“碳达峰,碳中和”目标对综合能源系统提出了低碳高效的新要求。针对园区综合能源系统的源-网-荷-储联合规划问题,基于Bellman最优理论将系统净收益最大化的规划模型进行分解,建立“风光储协同-多能互联耦合-能源消纳制氢-最优碳捕集”的多阶段动态规划模型并求解设备的最佳配置方案。结果表明,该模型在经济性和环保性方面具有显著优势,电制氢收益可观并促进电能就地消纳,碳捕集降低了系统碳排放并具有售卖CO_(2)气体和碳配额的双重收益,同时在动态规划过程中达到了最佳的电制氢配置和最优的碳捕集比例。