Size Effect on the Raman Spectra and Electronic Structure of the Glycine-alanine Oligopeptide Chains

A theoretical study on oligopeptide chains of glycine-alanine by density functional theory（DFT） is given in this paper. Raman spectra of the oligopeptide chains are examined. The geometric structures, frontier orbital, energy gap, atomic charge distribution, density of states and chemical activity of the side chain are studied at the B3LYP/6-31G（d） level. Results show that, with the number of residues increasing, vibrations of typical functional groups present Raman frequency shift, and the energy gap is gradually reduced. The HOMO and LUMO focus on the amino and carboxyl at the ends of oligopeptides. It is helpful for oligopeptides to self-assemble into chains. In addition, different residues（glycine or alanine） at the ends of chains result in the even-odd effect of orbital energy in the growth process. The size effects of physical and chemical properties only exist when the oligopeptides are shorter, and the phenomenon disappeared as the chain continues to grow.

Study on Factors Influencing the Reliability of the Organization Management Chain of the Large and Medium-Sized Project in the Construction Period

On the basis of analyzing the reliability of the organization’ management chain of the large and medium- sized project in the construction period, the paper studies the factors influencing the reliability of the organi-zation management chain, which, corresponding to four elements of management chain – “Management Loop”, “Management Link”, “Management Chain”, and “Management Network”, can be summarized as project main body, interface management, connection sequence and management model. The paper then re-searches on the specific influencing factors from the above-mentioned four aspects.

可持续供应链管理对中小制造企业朴素式创新的影响研究

基于可持续供应链管理视角,对6家企业进行定性探索和295家制造业中小企业进行实证检验,分析制造业中小企业朴素式创新的主要影响因素。研究表明:在可持续供应链内部管理方面,内部环境管理与内部社会责任管理会促进中小制造企业的朴素式创新;在可持续供应链外部管理方面,企业与供应商进行可持续合作会促进企业朴素式创新的开展,而企业监督评价供应商的可持续发展行为并不影响企业的朴素式创新;公司规模仅在可持续供应链内部管理对企业朴素式创新的影响中发挥正向调节作用。

供应链金融对建筑中小企业融资约束的影响研究

建筑供应链金融是建筑中小企业解决融资难问题的有效路径。本文以建筑供应链金融的应用现状和中小企业融资约束成因为研究基础,以2017—2021年我国中小板107家建筑上市企业财务数据为样本,以现金——现金流模型为理论基础,验证了建筑供应链金融对中小企业融资约束的缓解作用,同时探究建筑中小企业发展供应链金融面临的风险及信息化欠缺等问题,提出建筑中小企业发展供应链金融的可持续发展路径,从地方政府、金融机构和中小企业自身角度提出具体的实施建议。

民营粮食收购企业供应链融资模式选择的影响因素研究

论文针对东北三省中小民营粮食收购企业存在融资难的问题,选取东北三省中小民营粮食收购企业收储供应链为研究对象,首先,通过问卷调查得出:一是这类企业选择供应链融资模式频率由小到大依次为“应收账款类融资模式”“信用类融资模式”“存货类融资模式”;二是在下游购销企业主导的粮食收储供应链金融中,以其自身资质向中小民营粮食收购企业提供担保的意愿不高;三是中小民营粮食收购企业认为政商关系总体在合格以上。其次,运用多变量Probit模型,得出供应链融资模式选择影响机理:贷款期限对信用类融资模式选择有显著的正向影响,政府对这类企业的服务水平正向影响着存货类融资模式选择。最后,得出政策启示:政府应提高服务水平精准到选择存货类融资模式的企业,通过优质中小企业梯度培育政策鼓励中小民营粮食收购企业兼并,鼓励银行扩大资产负债率的融资条件到8%—20%。

中小企业“链式”数字化转型的逻辑与实践——以广东为例

“链式”数字化转型是当前推动中小企业数字化转型的热点方向和有效途径。本文以广东省当前开展的产业集群数字化转型工程和省级中小企业数字化转型城市试点工作为背景,分析中小企业开展“链式”数字化转型的内在逻辑,阐述综合考虑技术和商业的转型蓝图,分析供应链模式和产业链模式两种实施路线以及“1+1+N”的组织方式,最后介绍典型的实践案例,为全国推动中小企业数字化转型提供参考。

销售端回收的包装尺寸与产品线决策研究

本文通过构建逆向供应链中制造商主导零售商跟随的Stackelberg博弈模型,研究了零售商回收包装废弃物模式下,制造商如何决定产品包装尺寸和产品线选择的问题。首先,制造商做出产品包装尺寸、批发价格以及产品线的决策;其次,零售商从制造商购买产品后决定产品的零售价格和产品包装的回收率;最后,零售商回收的产品包装废弃物回到制造商。研究结果表明:当包装回收难度系数较低时,制造商应同时提供大小包装的产品;当包装回收难度系数不低时,仅提供小包装的产品是最优决策。当包装回收难度系数处于中间水平时,制造商会选择推出小包装的产品,小包装产品的回收率反而小于大包装产品的回收率,同时提供大小两种包装的产品时的回收率最低。有意思的是,单位回收价格的增加会导致零售商和制造商利润都增加,补贴价格的增加则导致两者的利润降低。

大数据时代企业供应链融资模式创新研究——以海南中小微企业为例

中小微企业融资难、融资贵、融资慢一直是我国中小微企业健康发展的一道难题。近年来国家虽然出台众多政策扶持,但由于地理和外在条件的各种原因,海南省的中小微企业“融资难、融资贵”与岛外相比更为突出。传统的供应链融资很难解决中小微企业资金问题,原因是传统供应链融资需要交易主体征信和固定的业务关系。传统的供应链融资需要从人际信任走向数字信任,将企业的经营业务数字化和信息化,真实、客观、全面地反映出供应链运营中的状况和各经营主体在其中的作用。然而,不管是以核心企业为主的供应链融资还是以物流企业为主的“1+N”供应链融资模式,都没有降低企业的融资成本。但随着大数据、人工智能所代表的数智时代技术的创新,以数据为基础充分发挥人工智能的运算和分析能力,成为真正解决“融资难、融资贵”的有效途径。

双横臂悬架车轮定位灵敏度分析及公差研究

车轮定位在底盘悬架系统开发和生产尤为重要。双横臂悬架系统相比于常见的麦弗逊悬架系统增加了零部件和铰接点,所以定位参数较难控制。针对此问题,首先进行了悬架系统硬点的K&C(运动学和弹性运动学)分析,并保证车轮定位参数的动态变化率在合理范围;然后进行双横臂关键硬点的灵敏度分析,制定工程化操纵方便的定位参数调整方案和调整量;最后对车轮定位参数的尺寸链的公差分析研究,并严格管控零部件公差和整车装配公差。从而确保悬架系统在量产时达到车轮定位参数一致性要求,避免轮胎异常磨损和跑偏问题的出现。

中小企业数字化转型融资赋能机制的演化博弈——基于供应链金融视角

改善中小企业融资困境,加速中小企业数字化转型,对中小企业高质量发展具有重要意义。核心企业通过数字化服务平台支持和信贷担保支持,可以有效地为中小企业数字化转型融资赋能。从供应链金融视角切入,融合数字化服务平台和政府补贴,设计核心企业为中小企业数字化转型融资赋能的机制,通过演化博弈模型分析机制有效性,通过数值仿真进一步探寻初始积极策略比例、政府补贴、参与成本等不同因素对机制效果的影响。研究发现:中小企业、核心企业、金融机构选择积极策略的初始比例越高,博弈系统收敛到帕累托最优状态的概率越高;政府补贴有助于中小企业数字化转型融资赋能机制顺利发挥作用,但在博弈主体初始积极策略比例较低时的边际效用较弱;降低博弈主体的参与成本是促进博弈系统向帕累托最优状态演化的重要途径。

数字化转型对供应链弹性的影响——一个有调节的中介模型

为剖析数字化转型对供应链弹性的影响机制,建立概念模型分别检验供应链协同以及企业规模在两者之间的中介效应与调节效应。结果表明:数字化转型与供应链弹性显著正相关;供应链协同在数字化转型与供应链弹性中起部分中介作用;企业规模对数字化转型与供应链弹性、数字化转型与供应链协同有负向调节作用,而对供应链协同与供应链弹性有正向调节作用。提出应积极开展企业数字化转型,建立供应链协同管理机制,为中小企业营造良好的转型支持氛围。

基于D-AHP和物元可拓理论的中小企业供应链风险评价

为提高制造类中小企业供应链风险管理水平,通过运用D-AHP方法和基于物元可拓理论的综合评价方法,以a企业为例,对其所面临的供应链风险进行识别,并在此基础上建立供应链风险评估指标体系,计算各评价指标权重,结合专家意见,通过计算最终确定7个一级评价指标、19个二级评价指标和企业整体供应链风险水平。结果表明,a企业供应链的整体风险等级为低风险,其中2个一级评价指标和5个二级评价指标风险水平为中风险,其余一级和二级评价指标的风险水平为低风险。对以a企业为例的制造类中小企业供应链风险进行识别和评价,为同类型企业的供应链风险管理提供参考,提高行业供应链风险管理水平。

“政府市场规制+核心企业绿色采购”视角下中小制造企业污染治理策略演化

为破解中小制造企业污染治理困境,探索多主体协同治理新路径,本文构建由地方政府、核心企业、中小制造企业构成的三方演化博弈模型,研究地方政府通过市场规制作用于核心企业,核心企业借助供应链主导优势倒逼中小制造企业污染治理的机理,以及合作共治成为演化稳定均衡的条件和影响因素。研究表明:(1)核心企业主导治理的成本越小、声誉奖励或惩罚越大,越能促进核心企业主导治理,而税收优惠规制手段只有在主导治理成本大于两倍的声誉奖励或惩罚时,才发挥正向激励作用。(2)核心企业绿色采购提升了中小制造企业污染治理积极性,而金融机构绿色信贷作为平衡中小制造企业收益的补充方式,在采购量带来的额外收益小于两倍的治理成本时将发挥正向促进作用。(3)媒体曝光率在中小制造企业污染治理净收益大于不治理净收益时,发挥正向激励作用。(4)博弈主体成本收益满足一定条件时,系统演化稳定于理想的均衡状态(1,1,1)。“地方政府市场规制+核心企业绿色采购”视角下三方行为演化机理的研究,为中小制造企业污染协同治理提供了创新思路。

网销中果型鲜食番茄全产业链生产管理技术

为了提高中果型鲜食番茄生产经营者的积极性,保护全产业链各方利益,保证产业健康有序发展,从产前、产中、产后3个方面系统阐述了中果型鲜食番茄产地环境、GAP要求、品种选择、壮苗培育、田间管理、采摘收获、生产记录、产品包装、等级标准、存储条件、快递服务、售后服务及运营管理等全产业链生产管理技术,该技术推广应用后,可实现番茄的周年安全、稳定供应,得到了菜农的积极响应,农户不仅获得了番茄种植的收益,还参与视频直播,获得了网络销售的收益。

Collaborative supply chain planning under dynamic lot sizing costs with capacity decision

Studies show that supply chain cooperation improves supply chain performance. However, it remains a challenge to develop and implement the realistic supply chain cooperation scheme. We investigate a two-echelon supply chain planning problem with capacity acquisition decision under asymmetric cost and demand information. A simple negotiation-based coordination mechanism is developed to synchronize production/order strategies of a supplier and a buyer. The coordination scheme shows how the supplier and the buyer modify their production and order policy in order to find a joint economic lot sizing plan, which saves the overall supply chain cost. The allocation of the cooperation benefit is determined by negotiation. Due to the complexity of the multiple periods, multiple level supply chain lot sizing with capacity decision, a heuristic algorithm is developed to find coordination solutions. Finally, the results of the numerical study indicate the performance of supply chain coordination scheme.

河南省中小企业供应链融资模式优化策略研究

供应链融资是建立在供应链管理基础上的新型融资业务,它将供应链上的核心企业及其相关的上下游配套企业作为一个整体,根据供应链中企业交易关系和行业特点制定基于货权及现金流控制的整体金融解决方案。河南省通过积极搭建“信豫链”供应链金融公共服务平台,构建供应链融资场景,中小企业供应链融资模式取得了一定的成效。然而,当前河南省中小企业供应链融资模式还面临着诸如中小企业信用等级评价体制有待健全,供应链信息共享系统有待畅通,区块链赋能供应链融资不足,供应链管理人才相对匮乏等问题,基于此,文章针对持续改进河南省中小企业供应链融资模式提出了若干政策建议。

中大尺寸电子纸发展现状及其薄膜晶体管基板技术分析

从电子纸市场观察入手,介绍了中大尺寸电子纸显示在电子阅读器和标牌等领域的应用现状,阐述了电子纸供应链主要情况,探讨了薄膜晶体管基板作为供应链关键上游材料的技术发展方向,分析了薄膜晶体管基板技术上的创新和实现构想,为新一代中大尺寸电子纸显示用薄膜晶体管基板的设计提供参考和指导建议。

Sand Grain Size and Organic Matter Concentration in the Intertidal Zones on the Southwest Coast of Taiwan

From April 2013 to April 2014, the average pH and water temperature of the Taisi oyster cultivation area (TS, Yunlin County, Taiwan) were 8.05 (7.35 - 8.45) and 24.7˚C (13.7˚C - 32.8˚C) (N = 8226) The average organic matter (OM) concentration at sites TS-A and TS-B were 6.9% ± 1.3% and 6.9% ± 1.2%, and the weight of drift sand was 40.3 ± 19.1 g/d/m2 and 28.5 ± 34.3 g/d/m2 (N = 27). Considerable sand drifting typically occurs during the southwest monsoon season in summer. The average OM concentration at five dunes from Zhuoshui estuary to Zengwun estuary was 23.9 ± 4.5 g/kg. The percentage of sand grain weight of 0.15 - 0.25 mm and 0.25 - 0.60 mm was 82.5% ± 14.2% and 10.5% ± 12.0%. In the spring and autumn of 2015, the average OM concentration at the eight intertidal zones from Hanbao to Cigu was 49.8 ± 34.1 g/kg (N = 177), and the OM concentrations at Huwei estuary and Hanbao and Fangyuan intertidal zones were relatively high. The OM concentration (95.3 ± 75.7 g/kg) of the low tide zone of Huwei estuary was the highest among all tidal zones. The OM concentration during spring (59.4 ± 41.7 g/kg, N = 95) was higher than that in autumn (39.1 ± 17.8 g/kg, N = 84). For sand grain size ranges 0.15 - 0.25 and 0.063 - 0.15 mm, the weight ratio of intertidal sediment was 39.4% ± 26.9% and 27.6% ± 20.1%, respectively. The broad and flat intertidal zone was marked by fine sand and long intertidal zone;the weight ratio of SGSs < 0.25 mm exceeded 65%, and the OM concentration was between 20 and 30 g/kg. Coastal habitat diversity creates differences in biological communities, especially among crabs and benthic organisms. A greater understanding of coastal environments can aid in the management of coastal wetlands.

Particle Size of Barchan Dune in Hexi Desert Area and Its Relationship with Wind Speed

[ Objective ] The paper was to study the particle size characteristics of barchan dune and its formation mechanism in Hexi desert area d Gansu. [ Method] Through particle size measurement and wind speed flow field observation d dune, the particle size differences of various sampling plots and various parts of dune were analyzed using analysis of variance, and the relationship between particle size and wind speed was analyzed using correlation coefficient method. [ Result] （ 1 ） Barehan dune and barehan chains in Hexi desert area of Gansu were mainly consisted of fine sands and medium sands at the depth of 0 -5 cm： the sand particle in Gulang desert area was fine, which had significant difference with that in Jinchang, Linze, Jinta and Minqin desert areas. （2） Medium sands gradually increased from the bottom of windward slope to the dune peak in both barchan dune and barchan chain. On the windward slope of barehan dune, fine sands gradual- ly increased from the middle to both sides, while coarse sands and medium sands gradually decreased. On the windward slope of barehan chain, fine sands first de- creased then increased from the middle to NE side, but first increased then decreased from the middle to SW side. （3） In terma of particle size, there were great variations between fine sands and coarse sands ; for dune parts, there were great variations between dune peak and leewant slope toe; for dune types, the variation of fine sands in various parts of barchan chain was greater than that of barchan dune, while differentiation degree of medium sands and fine sands was greater than that of barchan dune. The particle size of fine sands was positively correlated with wind speed, and that of medium sands was negatively correlated with wind speed. [ Conclusion] The formation environment of particle size of berehan dune mainly included sand source and dynmnic source, and wind speed was the dynamic source for particle size distribution of barchan dune.