34. (判断题, 2分) 1.1 Considering the bursty data transferring, a circuit switching network outperforms a packet switching network. • A. 对 • B. 错 35. (判断题, 2分) 1.2 There is no network congestion in a circuit switching network. • A. 对 • B. 错 36. (判断题, 2分) 1.3 Consider an application that transmits data at a steady rate, and once this application starts, it will stay on for a relatively long period of time. According to the characteristic, a packet-switched network would be more appropriate for this application than a circuit-switched network. • A. 对 • B. 错

The interval sensitivity analysis and optimization of the distribution network parameters considering the load uncertainty

This paper proposes an advanced approach to optimize the line and transformer parameters for the distribution system. The approach first adopts a novel set of interval sensitivity models, based on ...

数据仓库.(Building.The.Data.Warehouse,.4th edition)

Good morning all teachers and students, my name is liangwenjun The topic of my report is Influence of molten salt potential on stress corrosion cracking behavior of 316 stainless steel. Stress corrosion cracking (SCC) is the cracking of sensitive materials resulting from the combined action of a fixed tensile stress and some specific corrosive medium.As shown in the picture on the right， Stress corrosion cracking is also one of the main causes of reactor structural material failure。 Structural materials for molten salt reactors must have good resistance to fluoride corrosion, excellent mechanical properties, good resistance to high temperature oxidation and irradiation Stainless steels such as 316 have ASME certification for high-temperature pile materials andare very economical.Therefore, many companies are considering 316 stainless steel as a structural material when designing molten salt reactors。Such as Kairos power and Terra power. 316 showed good corrosion resistance in purified molt en fluoride salt, and in Chen's study 316 did not crack with or without Cr addition under the synergistic effect of stress. Therefore, we accelerate corrosion by adding europium ion, and in the study to quantify the molten salt potential and stress magnitude, and finally determine the effect of molten salt potential on stress corrosion cracking of 316 stainless steel.

早上好，各位老师和同学们，我的名学是梁文军。我的报告的主题是：熔盐电位对316不锈钢应力腐蚀开裂行为的影响。应力腐蚀开裂（SCC）是指敏感材料由固定的拉应力和某些特定腐蚀介质的结合作用导致的裂纹。...

用中文翻译：A coupled three-dimensional model is developed to study the internal parameter distributions of the MBPP fuel cell stack, considering fluid dynamics, electro-chemical reactions, multi-species mass transfer, twophase flow of water and thermal dynamics. The model geometry domains include anode MBPP, anode gas wavy flow field (5 parallel flow channels), anode GDL, anode catalyst layer (CL), membrane, cathode CL, cathode GDL, cathode gas wavy flow field (5 parallel flow channels), cathode MBPP and the two-layered coolant wavy flow fields at anode/cathode sides. According to the stack design, the design parameters of wavy flow fields for anode and cathode sides are the same but the phase deviation between their wave cycles presents 180◦. The two wavy flow fields of coolant, at the respective back sides of the anode and cathode plates, form the intercrossed two-layered coolant flow fields inside the MBPP, due to the phase difference of 180◦ between the wave cycles (Fig. 3). The mismatched flow field patterns between the neighbored fluid flows lead to complicated geometry and mesh building. The presented model geometry is divided into several layers (xz plane) according to the different domain materials so that the thin metallic plate and fluid domains with complicated 3D morphologies could be finely meshed layer by layer. As the real geometry of the experimental stack is too large for calculation, the modeled flow field consists of 5 parallel wavy channels, each of which includes 2 wave periods and corresponding inlet/outlet portions as well. To study the detailed thermal behavior of the presented design, the two-layered coolant fluid flow at the back side of the anode plate is considered and so is for the cathode plate. The counter flow operation is conducted where the air flows at the same direction with coolant but the opposite with hydrogen, shown in Fig. 3 (b).

研究MBPP燃料电池堆内部参数分布的三维耦合模型被建立，考虑流体力学、电化学反应、多物种质量转移、水的两相流动和热力学。模型几何域包括阳极MBPP、阳极气体波浪流场（5个平行流道）、阳极GDL、阳极催化层（CL）、...

3)A digital clock consists of a screen to display the time and a dial for setting in turn the year, month, day, hour and minute. Twisting the dial to the left reduces by one the value being changed but twisting it to the right increases it by one. Pushing the dial alters which value is being adjusted. At first, it is the year but after the dial is pushed once, it is the month, then after the dial is pushed again, it is the day and so on. Imagine the clock is represented by a class with attributes year, month, day etc. The following is what the code for a method rotateDialLeft() might look like. public void rotateDialLeft() { if (mode == YEAR_MODE) { year--; } else if (mode == MONTH_MODE) { month--; } else if (mode == DAY_MODE) { day--; } else if (mode == HOUR_MODE) { hour--; } else if (mode == MINUTE_MODE) { minute--; } } The code for rotateDialRight() is similar. Apply the Open-Closed Principle to explain why the above code is unsatisfactory from the design viewpoint, considering the possibility of future change to the code, giving an example of such a change. 5)Give the code required for the classes introduced in question 3), focusing on the code for a method selectState() which changes the value that is being adjusted from years to months. Make it clear in which classes the code is to be found. Assume the existence of other methods that are needed such as getMonthSetUpState(). 8)Suppose that in a multiplayer role-playing game, a class Client has a dependency to an interface Fighter with public methods attack(), defend() and escape(). The game designer now wishes for Client to use a class Wizard with three different but equivalent public methods castDestructionSpell(), shield() and portal(). Explain how it is possible to do this using an appropriate design pattern.

3) The current implementation of the rotateDialLeft() method violates the Open-Closed Principle, which states that software entities (classes, modules, functions, etc.) should be open for extension ...

decision_function is not available when novelty=False. Use novelty=True if you want to use LOF for novelty detection and compute decision_function for new unseen data. Note that the opposite LOF of the training samples is always available by considering the negative_outlier_factor_ attribute.怎么解决python

这个错误通常发生在你使用 scikit-learn 的 LocalOutlierFactor 模型时，尝试在 novelty=False 的情况下调用 decision_function() 方法时。 LocalOutlierFactor 模型的 decision_function() 方法只适用于 novelty=...

Develop and analyze a mathematical model that will assist negotiators to respond to a fixed set of water supply and demand conditions. Use the model to inform dam operations: When the water level in Lake Mead is M and the water level in Lake Powell is P, how much water should be drawn from each lake to meet stated demands? If no additional water is supplied (from rainfall, etc.), and considering the demands as fixed, how long will it take before the demands are not met? How much additional water must be supplied over time to ensure that these fixed demands are met?

One approach to modeling this situation is to use a linear programming model that maximizes the amount of water supplied while meeting the fixed demand constraints. The objective function is to ...

Requirement Considering the relationship of drought adaptability with respect to the number of species in a plant community, your task is to explore and better understand this phenomenon. Specifically, you should: • Develop a mathematical model to predict how a plant community changes over time as it is exposed to various irregular weather cycles. Include times of drought when precipitation should be abundant. The model should account for interactions between different species during cycles of drought. • Explore what conclusions you can draw from your model with respect to the long-term interactions of a community of plants and the larger environment. Consider the following questions: • How many different plant species are required for the community to benefit and what happens as the number of species grows? • How do the types of species in the community impact your results? • What are the impact of a greater frequency and wider variation of the occurrence of droughts in future weather cycles? If droughts are less frequent, does the number of species have the same impact on the overall population?

答：为了探索并更好地理解旱灾适应能力与植物群落物种数量之间的关系，我们的任务是开发一个数学模型，预测植物群落在暴露于不同的不规则气候周期中如何随时间变化。模型应该考虑在干旱周期中不同物种之间的相互作用...

Algorithm 1: The online LyDROO algorithm for solving (P1). input : Parameters V , {γi, ci}Ni=1, K, training interval δT , Mt update interval δM ; output: Control actions 􏰕xt,yt􏰖Kt=1; 1 Initialize the DNN with random parameters θ1 and empty replay memory, M1 ← 2N; 2 Empty initial data queue Qi(1) = 0 and energy queue Yi(1) = 0, for i = 1,··· ,N; 3 fort=1,2,...,Kdo 4 Observe the input ξt = 􏰕ht, Qi(t), Yi(t)􏰖Ni=1 and update Mt using (8) if mod (t, δM ) = 0; 5 Generate a relaxed offloading action xˆt = Πθt 􏰅ξt􏰆 with the DNN; 6 Quantize xˆt into Mt binary actions 􏰕xti|i = 1, · · · , Mt􏰖 using the NOP method; 7 Compute G􏰅xti,ξt􏰆 by optimizing resource allocation yit in (P2) for each xti; 8 Select the best solution xt = arg max G 􏰅xti , ξt 􏰆 and execute the joint action 􏰅xt , yt 􏰆; { x ti } 9 Update the replay memory by adding (ξt,xt); 10 if mod (t, δT ) = 0 then 11 Uniformly sample a batch of data set {(ξτ , xτ ) | τ ∈ St } from the memory; 12 Train the DNN with {(ξτ , xτ ) | τ ∈ St} and update θt using the Adam algorithm; 13 end 14 t ← t + 1; 15 Update {Qi(t),Yi(t)}N based on 􏰅xt−1,yt−1􏰆 and data arrival observation 􏰙At−1􏰚N using (5) and (7). i=1 i i=1 16 end With the above actor-critic-update loop, the DNN consistently learns from the best and most recent state-action pairs, leading to a better policy πθt that gradually approximates the optimal mapping to solve (P3). We summarize the pseudo-code of LyDROO in Algorithm 1, where the major computational complexity is in line 7 that computes G􏰅xti,ξt􏰆 by solving the optimal resource allocation problems. This in fact indicates that the proposed LyDROO algorithm can be extended to solve (P1) when considering a general non-decreasing concave utility U (rit) in the objective, because the per-frame resource allocation problem to compute G􏰅xti,ξt􏰆 is a convex problem that can be efficiently solved, where the detailed analysis is omitted. In the next subsection, we propose a low-complexity algorithm to obtain G 􏰅xti, ξt􏰆. B. Low-complexity Algorithm for Optimal Resource Allocation Given the value of xt in (P2), we denote the index set of users with xti = 1 as Mt1, and the complementary user set as Mt0. For simplicity of exposition, we drop the superscript t and express the optimal resource allocation problem that computes G 􏰅xt, ξt􏰆 as following (P4) : maximize 􏰀j∈M0 􏰕ajfj/φ − Yj(t)κfj3􏰖 + 􏰀i∈M1 {airi,O − Yi(t)ei,O} (28a) τ,f,eO,rO 17 ，建立了什么模型

这段文字并没有建立具体的模型，而是介绍了LyDROO算法的伪代码以及解决问题(P1)和(P4)的方法。该算法是一种在线学习算法，利用深度神经网络来近似最优策略，并通过解决最优资源分配问题来求解目标函数。...

It is permissible to combine several parameters to a complex data type (structure) and - considering the TLV rules - to use them as one input/output parameter.

可以将几个参数组合成一个复杂的数据类型（结构），并根据标签-长度-值(TLV)规则将它们作为一个输入/输出参数使用。这句话的意思是，在一些情况下，将多个参数组合成一个复杂的数据结构可能更加方便和有效。...

帮我润色这段英文自我介绍：Dear professors, I am very glad to attend this interview. My name is Yu Yuezhou, from Shandong Province. I am 23 years old. I have got my diploma in computer Science and Technology from Shandong University of Science and Technology. In college, I always study hard because I think study can help me make faster progress. At the same time, I love hands-on practice, willing to study, not afraid of difficulties. In addition, I also served as the minister of a department in the Student Union, which helped me develop the habit of communicating with others and made many friends. If I had to use a sentence as my motto, I would choose - "you are more than what you have become now". Just because of this, I really want to become a graduate student to further study the professional field of computer and fully explore my potential. That's all for my introduction. Thank you.要求润色之后的英文要符合日常使用习惯

Additionally, I served as the minister of a department in the Student Union, which helped me develop excellent communication skills and make many friends. If I had to choose a motto, it would be "you...

【中国房地产业协会-2024研报】2024年第三季度房地产开发企业信用状况报告.pdf

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毕业设计&课设_宿舍管理系统：计算机毕业设计项目.zip

1、资源项目源码均已通过严格测试验证，保证能够正常运行； 2、项目问题、技术讨论，可以给博主私信或留言，博主看到后会第一时间与您进行沟通； 3、本项目比较适合计算机领域相关的毕业设计课题、课程作业等使用，尤其对于人工智能、计算机科学与技术等相关专业，更为适合； 4、下载使用后，可先查看README.md文件（如有），本项目仅用作交流学习参考，请切勿用于商业用途。

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