Correlation and Path Analysis for Growth Traits in F_1 Population of Pearl Oyster Pinctada martensii

120 pearl oysters （Pinctada martensii） were randomly sampled from F1 population, and shell length, shell width, shell height, shell weight and total weight of each sample were measured. Correlation and path analysis were conducted on the basis of measurement data. The results showed that shell length, shell width, shell height, shell weight and total weight were significantly correlated （P 〈 0.05）. Total weight was significantly and positively correlated with shell weight （r = 0.8970）, shell height （r = 0.6974）, shell width （r = 0.6521） and shell length （r = 0.5486）. Shell weight, shell height, shell width and shell length had positive and direct effects on total wet weight, with the values of 0.6356, 0.1872, 0.1814 and 0.0599, respectively. The results indicated that growth traits （shell length, shell width, shell height, shell weight and total wet weigh） of the F1 population could be improved by direct or indirect selection.

基于FP-Growth算法及补偿性入侵证据的攻击意图识别

针对现有方法的入侵证据单一,系统资源消耗大及最终结果不准确等问题,提出了一种新的攻击意图识别方法.将IDS的告警事件与其他安全工具如扫描器等的数据相融合,构成补偿性入侵证据,并在此基础上使用贝叶斯网络构建攻击场景;使用FP-Growth算法从攻击场景中挖掘出频繁攻击模式;最终将产生的频繁攻击模式关联以重构攻击路径,从而推断最可能的攻击意图.实验结果表明,该方法可准确识别攻击意图并有效节省系统资源.

基于项对索引链表的优化FP-Growth算法

提出了基于邻接矩阵思想的FP-Growth改进算法IPILFPG,它采用项对索引链表作为FP树的辅助存储,避免重复遍历路径,优化搜索过程.该算法显著降低挖掘存储空间以及时间复杂度,提高挖掘效率.通过实验验证其正确性,并与其它算法比较验证其高效性.

Growth mechanism of reinforcements in in-situ synthesized (TiB+TiC)/Ti composites

The growth mechanism of reinforcement in in situ synthesized (TiB+TiC)/Ti composites was investigated. The results show that reinforcements nucleate and grow in a way of dissolution precipitation. The morphologies of reinforcements are closely related to the solidification paths and crystal structure of reinforcements. TiB, as a reinforcement, is liable to grow along [010] direction and forms in short fibre shape due to its B27 structure, whereas primary TiC is liable to form composition undercooling and grow in dendritic shape. TiC phases precipitated in binary eutectic and ternary eutectic reactions grow in equiaxial shape. The addition of aluminum element refines TiB and TiC particles, and makes TiC reinforcements grow into the equiaxial particles easily. The addition of graphite adjusts the solidification paths and forms more TiC with dendritic shape. [

Effect of annealing treatment on microstructure and fatigue crack growth behavior of Al–Zn–Mg–Sc–Zr alloy

Al-Zn-Mg-Sc-Zr alloy samples were annealed to four different states （under-aging, peak-aging, over-aging and double-aging） and then thoroughly investigated by means of electron backscatter diffraction （EBSD）, transmission electron microscopy （TEM）, scanning electron microscopy （SEM）, tensile and fatigue crack growth rate tests to explore the influence of annealing treatment on microstmcture and fatigue crack growth behavior. The results indicate that Al3（Sc,Zr） particles can effectively refine grains and enhance tensile properties and fatigue properties. After annealing treatment, the under-aged sample and double-aged sample obtained average grain sizes of 4.9473 and 4.1257 μm, and the maximum value of yield/tensile strength （561 MPa/581 MPa） was obtained in peak-aged state. In the Paris region, fatigue crack growth rate, crack deflection and bifurcation, crack blunting and inter/trans-granular propagation were discussed based on data fitting and Laird model and Griffith theory. And the results show that the under-aged sample possesses the best resistance to fatigue crack propagation and the most tortuous and bifurcated crack path. For all samples, the fatigue crack growth rate in the rupture region was inversely proportional to yield strength.

THE OPTIMAL ALLOCATION ABOUT CAPITAL AND LABOR IN THE ECONOMIC GROWTH WITH AN ENDOGENOUS TECHNICAL PROGRESS MODEL

In this paper, the balanced economic growth path was considered in a new growth model with endogenous technical progress. It is not only obtained the optimal allocation about capital and labor between a goods-producing sector and a R&D Sector, but also the optimal value of saving rates. By discussing the effect of parameters, it are also got the following results: When the rate of time preference (discount factor) rising, the fractions of Capital and labor in the goods-producing sector will increase, the fractions in R&D sector and the saving rates will decrease; When the population grows rapidly, the result will be contrary.

ON FATIGUE CRACK PATH DEVIATION AT ELEVATED TEMPERATURE IN ELECTRON BEAM REPAIRED WELDMENTS OF TURBINE DISK

Fatigue crack growth behaviors in electron beam weldments of a nickel-base superalloy are studied. The objective of this paper is to discuss effects of the inhomogeneity of mechanical performance on fatigue crack growth (FCG) rate and crack path deviation (CPD). The base metal served in a turbine disk of aerospace engine was selected to fabricate bead-on-plate weldments by using electron beam welding. Some wedge-type opening loading specimens, notched in three different zone of weld metal, HAZ and base metal, were employed and performed fatigue crack growth tests at 650℃. The results show that the fatigue crack growth of electron beam welded joints is instable due to the influence of mechanical heterogeneities. Owing to the crack deviation at the weld metal and heat-affected-zone (HAZ), the effective growth driving force at the tip of fatigue crack was reduced with the reduction of the effective stress intensity factor (SIF) which finally causes fatigue crack rate decrease. Fatigue crack was strongly affected by size and the symmetrical characteristics of the plastic zone at the crack tip, which means that the integrity of the welded structure containing the fatigue crack mainly depended on the toughness of the low strength zone.

AN URBAN ECONOMIC GROWTH MODEL WITH ENDOGENOUS INFRASTRUCTURE ALLOCATION

In this paper, an urban economic growth model with endogenous infrastructure allocation is given by introducing the two-variable utility function for city＇s inhabitant. A twodimensional dynamical system is obtained by solving the utility maximization problem and it is proved that this system has the unique non-zero equilibrium which is a saddle. The model has the unique optimal growth and an optimal rate of infrastructure allocation.

Decades of Boom Testament to Viability of China’s Path

THIS is a story about the past as much as about the future.When the 2008 financial crisis buffeted the U.S. economy and went global, China weathered the downturn. Following the global crash, its rapid return to recovery sparked more questions by then unanswered. Among them a core one is: What was China’s secret formula?

The Analysis of Relationship between MSTN/Smad Signal Path and Turpan Black Sheep Meat Production

The research analyzed the expression and difference of MSTN/Smad signal path genes(MSTN, Smad2, Smad3,Smad4, TGFBR1, TGFBR2) in Turpan black sheep muscle tissue, as well as the correlation with some growth indices. Besides,the research used the fluorescence quantitative PCR technique to detect the expression level of MSTN, Smad2, Smad3, Smad4,TGFBR1 and TGFBR2 genes in m RNA of Turpan black sheep muscle. The research also used conventional and histological methods to determine the muscle growth and meat producibility indices, discussed the relationship between MSTN/Smad signal path and muscle growth and meat production. The result shows that these genes are expressed in Turpan black sheep muscle tissues, and have some relationship with body weight, height, length, chest circumference, hoof circumference, carcass and dressing percentage. The MSTN gene is negatively correlated with body weight(r = 0.993, P < 0.05), and hoof circumference(r= 0.957, p < 0.01), but has no significant correlation with body height, length, carcass weight, dressing percentages(P > 0.05);Smad2 gene shows significantly negative correlation the with dressing percentage(r = 0.918, p < 0.05), but no significant correlation with body weight, height, length, chest circumference, hoof circumference and carcass(P > 0.05); Smad3 gene shows no significant correlation with any of them(P > 0.05); Smad4, TGFBR1, TGFBR2 did not show any significant relationship with body height, length, chest circumference, weight and dressing percentage(P > 0.05).

“新质生产力”发展演进及其增长路径的理论阐释

“新质生产力”的发展演进主要表现为,在前后历史阶段转型过程中,传统的第一生产要素地位被新一代第一生产要素所取代。即“新质生产力”系指由新的第一生产要素配置其他要素而形成的先进生产力。从当今社会发展转型阶段来看,“新质生产力”则是“颠覆性技术创新”替代资本驱动增长的先进生产力,其中数字化、数字化绿色化融合是其产业载体的主要特征。是故,当今阶段发展“新质生产力”,应从扩张新质生产要素、提高新质生产要素效率、优化配置新质生产要素与其他要素等方面寻求其增长路径。

数字经济赋能养老产业的增长路径研究

数字经济的发展为养老产业增长注入新动能,智慧养老成为一种有效应对人口老龄化的数字化治理模式,推动养老产业增长。基于组态视角,采用模糊集定性比较分析方法(fsQCA),以养老产业增长为结果变量,以中国内地30个省级行政区(不含数据缺失较多的西藏)为案例,从数字经济的基础、发展及规模三个维度,探寻数字经济发展赋能养老产业增长的组态路径,为养老产业的数字化转型提供参考。研究发现:数字经济单一要素并不构成养老产业高增长水平的必要条件,养老产业高增长水平是数字经济多种要素协同作用的结果;“数字基础设施”与“数字人才”是各地发展养老产业的核心要素,“数字应用”、“数字交易”及“数字金融”等要素更多情况下作为辅助条件发挥作用;“数字基础设施+数字人才”奠基型、“数字人才+数字应用”推动型、“数字化基础+规模”驱动型、“数字化基础+发展+规模”引领型是四条有效增长养老产业的路径。基于此,提出发挥要素协同作用、强化数字化基础建设及打造数字化养老平台等对策建议,从而实现养老产业的高质量增长。

德国竞技体育发展中社会和市场力量成长的政府支持、路径及启示

为深化推进我国竞技体育的社会化、市场化改革,通过文献资料法对德国竞技体育发展中社会和市场力量成长的政府支持、路径及其启示进行了研究。研究认为:德国竞技体育发展中社会和市场力量的成长获得了国家政策法规的扶持、政府财政资金的支持、管理的放权与服务。成长路径表现为服务于促进国家意识形态统一的成长路径、服务于推动多种形态体育协调发展的成长路径、服务于提高运动训练科学水平的成长路径。研究建议:为促进我国竞技体育发展中社会和市场力量的成长,应建构“强政府-大社会”的竞技体育发展新格局、推动俱乐部体制和联赛体系的专业化发展、整合各类社会资源协同促进竞技体育发展。

乡村人才振兴背景下乡村教师的专业成长路径

乡村人才振兴是乡村振兴的关键,而乡村教师作为乡村振兴的重要人才支撑,其专业成长对乡村教育的质量和乡村人才振兴具有重要意义。当前乡村教师专业成长面临诸多困境,如何探索一条适合乡村教师专业成长的路径,成为乡村振兴背景下亟待解决的问题。从乡村教师专业成长的现状分析入手,探讨乡村教师专业成长的制约因素,并提出相应的对策建议。

战略科学家成长影响因素与路径研究

本研究聚焦战略科学家成长影响因素与路径问题,基于71位战略科学家中资料较完整的10位的文本数据,运用扎根理论构建“SFSOS”成长影响因素模型,并进一步使用文本挖掘法分阶段量化主范畴和副范畴对战略科学家成长的贡献度,探究其成长路径。研究发现:①在社会引导、组织支撑、学校培育、家庭支持的“四好”环境驱动下,个体自身素质得到极大提高,最终成长为成熟的战略科学家;②社会引导从成长期开始始终是最突出的影响因素,并且贡献度远超其他主范畴,相较于其他主范畴,学校培育在学习期的影响作用最显著,之后呈现下降趋势,但始终发挥作用,组织支撑的影响作用在成长期达到巅峰,仅次于社会引导,家庭支持呈现先降后平趋势,自身素质的贡献度在各成长阶段有轻微波动。

基于主体性建构向度的扬长教育模式论析

人才培养是高等教育的核心使命,也是其存在的基础和目的。当下人才培养问题很大程度上源于学生主体性的缺失。高等教育改革应然要求复归人的主体性建构,考虑个体的多样性,最大限度地帮助其实现自由而全面发展的期许。扬长教育模式,本质上立足于学生个体差异,注重其自主探究、扬长发展。其主体性建构的价值功能可以从知识选择、伦理建构和目标惠及等多个维度进行审视,现实旨趣则体现在坚持以人为本、聚集因材施教和指向多样育才。实践进路的过程设计应立足于学校、教师、学生3个层面,着眼于人才培养、资源配置、质量评价等多个环节,指向于德育实施、教学改革、制度优化等多个方面。

基于物流信息分析人才成长路径的实践项目体系设计

基于物流行业的快速发展及其对新型物流人才的需求,文章以物流工程专业为例,针对其既具有扎实物流管理专业知识又熟悉系统建模、数据挖掘等物流信息分析技术的复合型人才培养目标,进行了基于人才成长路径的实践项目体系的设计。文章根据物流信息分析师的岗位需求,设计了学生学习成长路线,包括了知识、能力与工具的推荐学习路线,又据此设计了与其相匹配的进阶式实践项目体系,从而对人才培养目标的实现提供了支撑。

国际中文教育学科成长的逻辑与路径

回答“何为学科成长、学科如何成长”是深入推进国际中文教育学科发展的理论前提。首先,把中华人民共和国成立以来国际中文教育学科成长实践归纳为四个时期九个阶段,并指出每个阶段的发展特征。其次,探讨国际中文教育学科成长逻辑:内在动力表现为由学科内部诸要素相互作用,形成学科自身的发展动力;外在推力则依赖于适应社会需求和外部环境的变化,积极调整学科发展机制,形成良性循环。最后,提出未来学科成长的探索路径:把握国际中文教育双重本质内涵、明确国际中文教育学科基点边界、关注国际中文教育学科生态建设、构建国际中文教育自主知识体系、培养高层次的中文教育专业人才、实现全球中文教学的数智化发展,为新的发展阶段实现国际中文教育高质量发展提供参考借鉴。

家庭教育指导师专业素养评价体系与成长路径研究

家庭教育指导师作为新职业于2022年被纳入《中华人民共和国职业分类大典》后,国家从政策制定、专业人才培养、指导实践创新等多方面推进家庭教育指导的专业化。2022年,家庭教育被正式纳入高等教育本科专业目录,标志着家庭教育专业化时代来临。本研究通过自制问卷对上海76位专家型教师进行调查,构建了包含专业精神、专业知识、认知能力、社会情感能力、实践创新能力5个一级指标和26个二级指标的家庭教育指导师专业素养评价指标体系。随之提出了家庭教育指导师专业成长路径,即强化个体角色身份认同,进行自身素养修炼;提高职业群体认知,形成服务型实践共同体;职业和专业同步推进,加快专业人才培养进程;统筹协调校家社合作共育,强化社会协同支持。本研究可为开展家庭教育指导师专业素养评价和专业人才培养策略提供参考,助力我国家庭教育事业高质量发展。

三角帆蚌外套膜有核珍珠质量与育珠蚌生长性状相关和通径分析

三角帆蚌(Hyriopsis cumingii)外套膜有核珍珠培育是新兴的珍珠培育技术。为了鉴定影响外套膜有核珍珠质量相关的生长性状,本研究以2龄三角帆蚌为育珠蚌,每蚌植入10颗规格为5 mm的珠核,培育19个月至商品珠,对珍珠质量性状(产珠数/成珠率、最大直径、最小直径、圆度、珍珠层厚度)与育珠蚌生长性状(壳长、壳宽、壳高、活体质量、壳质量、软组织质量)、珠核(最大直径、最小直径、圆度)进行相关及通径分析。结果显示,该批育珠蚌平均成珠率为(70.00±10.82)%,珍珠平均大小(最小直径)为(6.91±0.67)mm,珍珠平均圆度(直径差百分比)为(6.74±7.78)%。珍珠大小、珍珠层厚度与育珠蚌的壳宽、活体质量和壳质量极显著正相关(P<0.01),与育珠蚌的壳高和软组织质量显著正相关(P<0.05);壳宽与珍珠大小和珍珠层厚度的相关系数最大,均为0.69;而成珠率、珍珠圆度与育珠蚌各生长性状均不相关(P>0.05)。壳宽对珍珠大小和珍珠层厚度的直接作用(0.69)及直接决定系数(0.50)最大。研究表明,三角帆蚌的壳宽是提升外套膜有核珍珠的大小和珍珠层厚度品质的关键性状。