Magnetic Field Curves and Magnetic Equipotential Surfaces around Crossing Electrical Wires Replacing Classical Magnetic Field Lines

This article is based on a recent model specifically defining magnetic field values around electrical wires. With this model, calculations of field around parallel wires were obtained. Now, this model is extended with the new concept of magnetic equipotential surface to magnetic field curves around crossing wires. Cases of single, double, and triple wires are described. Subsequent article will be conducted for more general scenarios where wires are neither infinite nor parallel.

Utilizing Iso-Value Field Curves in Lieu of Magnetic Field Lines Amid Infinite and Parallel Electrical Wires

Building on a new model proposed recently for calculating constant electro-magnetic field values, the present article explores the electro-magnetic field configuration generated by parallel electrical wires. This imposes a reevaluation of the drawing procedure for constructing field curves with a constant field values around multiple parallel electrical conducting wires. To achieve this, we employ methods akin to those used for creating contours on topographical maps, ensuring a consistent numerical field value along the entire length of the field curves. Subsequent calculations will be conducted for scenarios where wires are not parallel.

Magnetic field characteristics analysis of a single assembled magnetic medium using ANSYS software

The section shape of an assembled magnetic medium is the most important structural parameter of a high gradient magnetic separator, which directly affects the induction distribution and magnetic field gradient of the magnetic separator. In this study, equilateral triangle, square, hexagonal, octagon, dodecagon, and round shape sections of the assembled magnetic medium are chosen to study their influence on magnetic field distribution characteristics using the ANSYS analysis. This paper utilizes a single assembled magnetic medium to understand the relationship between the geometry of the assembled magnetic medium and its magnetic field distribution characteristics. The results show that high magnetic field,regional field, magnetic field gradient, and magnetic force formed by the different sections of the assembled magnetic medium in the same background magnetic field reduce in turn based on the triangle,square, hexagonal, octagon, dodecagon, and round. Based on the magnetic field characteristics analytic results, the magnetic separation tests of the ilmenite are carried out. The results indicate that the section shape of the toothed plate compared with the section shape of cylinder can improve the recovery of ilmenite up to 45% in the same magnetizing current condition of 2A, which is consistent with magnetic field characteristics analysis of different assembled magnetic medium section shapes.

A Note on Additive Characters of Locally Compact Fields

In this note, we give an elementary and constructive proof for that the additive character group of a locally compact field is isomorphic to itself as an additive topological group.

STUDY ON THE FRACTAL CHARACTER OF MAGNETIC ANOMALY FIELDS AND THE DELINEATION OF TECTONIC ELEMENTS IN THE SOUTH CHINA SEA

This is a quantitative method for studying the fractal character of magnetic anornaly fields and delineating tectonic elements using fractal theory . For an area with different geological and geophysical features , the definition of Hausdorff dimension is used to calculate the fractal dimension of the area’s magnetic field , then delineate geological tectonic elements by comparing this value . Use of 1978- 1986 geophysical survey data in this method applied to the South China Sea yielded three first grade tectonic elements and nine second grade ones , in six of which subsecond grade elernents were found.

On the Mean Value of High-Powers of a Special Character Sum Modulo a Prime

In this paper,we use the elementary methods,the properties of Dirichlet character sums and the classical Gauss sums to study the estimation of the mean value of high-powers for a special character sum modulo a prime,and derive an exact computational formula.It can be conveniently programmed by the“Mathematica”software,by which we can get the exact results easily.

An Introduction to the Theory of Field Extensions

This paper unfolds and reviews the theory of abstract algebra, field extensions and discusses various kinds of field extensions. Field extensions are said to be algebraic or transcendental. We pay much attention to algebraic extensions. Finally, we construct finite extensions of Q and finite extensions of the function field over finite field Fp using the notion of field completion, analogous to field extensions. With the study of field extensions, considering any polynomial with coefficients in the field, we can find the roots of the polynomial, and with the notion of algebraically closed fields, we have one field, F, where we can find the roots of any polynomial with coefficients in F.

A Unified Definition of Electrostatic and Magnetic Fields

This article originates from the observation that field lines are drawn using distinctive rules in magnetic field and electrostatic fields. It aims at reconciliating the definitions of these fields and thus reaching a consensus on the interpretation of field lines. Our unified field definition combines three orthogonal vectors and a unique scalar value. Field lines are then defined as isovalue lines of the scalar value, rendering it simpler to interpret in both field types. Specific to our field definition is the use of square root of vector’s cross product so that all vectors have the same physical unit. This enhanced field definition also enables a more efficient calculation of Biot-Savart law. This article is the first of a series allowing the drawing of isovalue contour lines.

秸秆还田对东北黑土水分特征及物理性质的影响

为明确秸秆还田对东北黑土水分特征及物理性质的影响,设置秸秆覆盖还田(FG)、秸秆翻埋还田(FM)和秸秆不还田翻耕(FD)3个处理,测定土壤含水量、水分特征曲线、容重、硬度、土壤三相比及结构稳定性等参数。结果表明:(1)秸秆覆盖还田可显著提高春季耕层(0~30 cm)土壤含水量,较秸秆不还田翻耕处理增幅为11.17%~150.84%;不同处理耕层土壤在水吸力中吸力段土壤含水量变化曲线平滑,秸秆覆盖还田处理具有较高的土壤持水性。(2)秸秆还田能显著提高土壤水分有效性,与秸秆不还田翻耕处理相比,秸秆覆盖还田处理0~10 cm土层土壤田间持水量提高4.85%~11.03%,土壤凋萎系数提高10.85%~18.00%;秸秆翻埋还田处理0~10 cm土层土壤重力水增加9.65%~80.73%。秸秆翻埋还田提升了土壤供水能力,土壤比水容量较秸秆不还田翻耕处理增加4.8%~10.0%。(3)与秸秆不还田翻耕处理相比,秸秆还田降低了收获后土壤紧实度,降低幅度为0.18~0.31 MPa;秸秆覆盖还田增加表层土壤容重,降低土壤孔隙度,促进三相结构趋于合理,显著增加土壤结构稳定性。(4)皮尔森相关分析表明,三相比R值与结构距离(r=0.73*)、土壤容重(r=0.70*)相关性显著,在一定范围内三相比R值的增加有利于改善并促进土壤结构稳定。综上可知,东北黑土农田实施秸秆还田是提高春季土壤含水量、增强土壤持水性、提升土壤供水能力、调节土壤紧实性、调控土壤三相比、改善土壤结构和提高土壤宜耕性的有效措施。

Strengthening DepEd CALABARZON's Commitment to Values-Based Education

The Department of Education(DepEd)remains unwavering in its commitment to guiding and nurturing Filipinos who hold a deep love for their country and actively participate in nation-building.It steadfastly pursues a learner-centered approach,instilling values that inspire youth to be God-fearing,humane,environmentally conscious,and patriotic.In line with its mission,DepEd CALABARZON aligns with this vision and emphasizes the importance of values education in the Philippine Curriculum.Recognizing the significance of values,DepEd consistently integrates core values-MakaDiyos,Makatao,Makakalikasan,and Makabansa-into its educational framework.These values are assessed quarterly alongside academic achievements,shaping learners into well-rounded individuals.Edukasyon sa Pagpapakatao and the Homeroom Guidance Program further foster commendable values and attitudes,motivating students to excel in both education and employment.However,the current assessment and recognition system fails to emphasize the importance of value formation,leading students to undervalue these essential qualities as they complete basic education.A cultural shift is necessary to promote positive values that foster a highly innovative and trust-based society.DepEd CALABARZON conducts a qualitative-quantitative study to identify factors contributing to learners’values,characters,and attitudes and the challenges they face in evolving these traits.The study aims to propose an innovative character education program rooted in DepEd’s core values,Edukasyon sa Pagpapakatao,and Homeroom Guidance competencies.This program seeks to recognize excellence in shaping fully developed CALABARZON learners,thereby strengthening DepEd’s core values and producing notable graduates in the future.

干热区紫花苜蓿的生产性能和营养价值评价

在云南省干热河谷区,以不同紫花苜蓿(Medicago sativa)品种(系)作为研究对象,应用方差和灰色关联度的分析方法对其生产性能及营养成分进行综合评价。结果表明,8个品种(系)的一级分枝数和水分有明显差异。所有参试材料在2018年和2020年每年可刈割8次,2019年为9次。6号苜蓿品种‘南苜701-特克拉’的年均干草产量最高,达到29589.96 kg·hm^(-2),显著高于5号‘四季旺’和8号‘德钦’(P<0.05)。在2018年,8个苜蓿品种(系)产量在4个季度中从高到低的排列顺序为第3季度>第2季度>第4季度>第1季度。所有供试材料的粗纤维、粗脂肪、粗灰分、全钙、无氮浸出物差异均不显著(P>0.05)。8号品种‘德钦’的粗蛋白含量(21.43%)、粗灰分(10.16%)和全磷含量(0.25%)均最高,粗纤维含量最低(18.36%)。经灰色关联度分析表明,‘热引41号紫花苜蓿’‘德钦’‘多叶’和‘WL525HQ’的综合表现较好,在该地区具有较高的推广利用价值。

科教融汇理念下现场工程师培养的内涵意蕴、基本遵循与实践路径

科教融汇既是科技创新发展的崭新要求,也是推动职业教育适应产业需求的有效途径。为应对产业数字化转型下的人才素质需求变化,国家围绕产业高端和高端产业提出“职业教育现场工程师专项培养计划”,旨在培养具有一线生产运作技能,并能优化生产流程的高素质技术技能型人才。为实现这一类型人才培养,政府主管部门应统筹多方科教资源,辐射现场工程师培养框架建设;职业院校应积极主导并搭建多方协同育人体系,共建科教融汇平台资源,落实现场工程师技能孵化与输出;同时吸收社会力量有效补位,完善和深化培训课程体系适应性建设,赋能现场工程师可持续发展。

不同羊草品种品质性状比较研究

为了明确不同羊草品种品质性状综合表现,挖掘羊草优良基因源。试验选取10份羊草品种,随机区组排列,采用直接灰化法及近红外光谱等方法对10份羊草品种的22个品质指标进行测定及数据分析。数据聚类及因子分析结果表明:22个品质性状可以分为营养价值指标和形态建成指标两类;品种YC01具有突出的营养价值优势;品种YC06、YC08在营养价值和形态建成性状之间达到了较好平衡,YC06的饲喂价值更优,可做优质饲草。研究表明,营养价值和形态建成这两类性状间的协调统一是优质羊草品种选育的基本尺度,可作为优势性状基因源加以创新和利用。

白桦四倍体半同胞家系生长和材性性状的变异及选择

为选出白桦(Betula platyphylla Suk.)优异四倍体母本及单株,调查了10年生四倍体半同胞家系子代试验林各家系生长(树高、胸径、材积)、材性(密度、纤维素质量分数、半纤维素质量分数、木质素质量分数、纤维长、纤维宽、纤维长宽比)、通直度、保存率等性状,并进行家系间性状方差分析及多重比较,估算遗传力及遗传增益。依据最优线性无偏估计法(BLUP法),利用DPS软件预测家系的育种值,并结合隶属函数法综合各性状育种值选择优良家系及亲本。通过简单选择指数法,在优良家系内选择优良单株。结果表明:除半纤维素质量分数外,白桦家系间的性状差异均达到显著或极显著水平,胸径及材积性状的表型、遗传变异系数均较大,其家系遗传力也在45%以上。综合各性状育种值选出7个优良家系及母树,其材积遗传增益为5.39%~17.06%,平均增益为10.26%。在优良家系内选出28株优良单株,其平均材积较二倍体(对照)提高137.21%,材积平均遗传增益为27.53%。

“脱嵌”—“再嵌入”:元宇宙阅读的价值意蕴与风险困境

在技术进化和整合所构建的元宇宙环境中,元宇宙阅读经历了“脱嵌”—“再嵌入”的过程。阅读内容的创作融合了PGC、UGC和AIGC三种模式,阅读方式实现了全真体验,阅读分享向虚拟场景传播演进,阅读与生活的边界逐渐模糊。在这样的语境中,阅读行为所带来的情感共鸣更为强烈,更容易找到趣缘群体,个体的阅读力得到巨大提升。但是我们也必须警惕元宇宙阅读带来的著作权益归属模糊、意识形态引导困难、数字鸿沟扩大、碎片化知识汲取泛化、纯虚拟信息干扰等隐忧。

里德堡原子电场传感器的自校准性解析及测量不确定度评定

传统电场传感器需要标准场或更高准确度等级的传感器进行校准,而基于原子固有能级结构和光谱特征的里德堡原子电场测量可溯源至基本物理常数,量子传感自带校准功能。该文阐述了里德堡原子与外场相互作用的量子相干效应,说明了里德堡原子传感器的电场测量原理,并解析了其自校准性。基于所构建的针对低频电场的里德堡原子传感测量系统,分析了误差来源,定义和计算了各种不确定度分量,得到合成相对标准不确定度为3.885%;保守考虑,在大于或等于95.45%的包含概率下得到扩展不确定度为7.77%。在此过程中,明确了不确定度的主要影响因素并提出了减小其影响的建议。最后给出传感系统实测电磁诱导透明(EIT)光谱频移量与电场强度之间的拟合函数,拟合确定系数达到0.9969,验证了所构建的低频电场量子测量系统的准确性。

农作物秸秆资源化利用问题及发展策略研究

分析了我国现阶段农作物资源化利用存在的附加值低、农户积极性不高、筹资难、农业机械化发展不均衡、人才缺乏等问题,研究适合我国农作物秸秆资源化利用的发展策略及措施,以推动我国农作物秸秆资源化利用。

以伟大建党精神涵养高校大学生价值观的逻辑理路

伟大建党精神是中国共产党的精神之源,弘扬伟大建党精神有利于为当代青年树立爱党爱国爱人民爱社会主义的价值追求,有利于厚植高校大学生的家国情怀,砥砺当代大学生的报国之心;涵养高校大学生的三观。有着丰富内涵的伟大建党精神独具育人价值和精神意义。以伟大建党精神涵养高校大学生的价值三观有利于我们走好新时代的长征路,培养造就堪当民族重任的时代新人,从而实现民族复兴的中国梦。

日本中文教育发展述评

文章通过历时分析、对比分析、文本分析等方法考察了日本中文教育的具体情况,发现:中文是日本诸多领域中的第二外语,但与作为第一外语的英语间存在显著差距;日本中文线上教学实践中,对线上教学模式基本持有肯定态度,偏好使用YouTube等视频教学资源。推进日本的中文教育发展,需要在客观把握当前中文教育发展实态的基础上,重视强化中文的领域语言价值,精准分析日本当下中文教育的本地化需求,大力推进中文教育的数字化发展。