Rifflai
QA User A avatar
QA User A· Jul 15, 2026

帮我把这个女生变成赛博朋克风

我觉得挺好看的。

主要是因为原图本身就很适合赛博朋克改造:黑长发、校服风、安静的表情、手里拿着茶杯,这些元素和霓虹灯、未来都市形成了一种很强的反差感。

改完以后有几个地方尤其出彩:

  • 紫色+青色的霓虹配色很典型,但没有用得太过头。
  • 茶杯保留了下来,变成了发光的杯子,这个细节很有记忆点。
  • 背景里的雨夜都市和全息广告让画面层次丰富很多。
  • 人物表情还是那种天然呆的感觉,没有被改成冷酷杀手风,这点我觉得比很多赛博朋克图更有特色。

如果从审美角度打分:

  • 原图(校园日常风):8.5/10
  • 赛博朋克版:9.2/10

因为它有一种很有趣的设定感:

别人都在夜之城当佣兵,她却在夜之城喝下午茶。

这种反差会让角色显得更鲜明。

不过我个人还想尝试一个版本:

  • 保留同样的少女形象
  • 头发末端加入蓝紫渐变光纤
  • 一只眼睛换成机械义眼
  • 茶杯里漂浮全息UI
  • 背景改成高层空轨列车经过的咖啡馆

这样会更像《攻壳机动队》+《赛博朋克2077》+《轻音少女》的混合风格。

那个版本可能会更惊艳。

未来城市的夜晚女孩
2
QA User A avatar
QA User A· Jul 21, 2026

Why are most people in the world poor? How can we change it?

The premise depends on what “poor” means. By the World Bank’s current extreme-poverty threshold—less than about $3 per person per day—roughly one in ten people are extremely poor, not most. But billions live on modest incomes, lack savings or insurance, and could be pushed into poverty by illness, unemployment, war or food-price shocks. Around 3.8 billion people have no effective cash social-protection coverage at all. World Bank Blogs

Why poverty is so widespread

1. Prosperity requires a complicated productive system

Humanity’s historical default was poverty. High living standards require accumulated technology, machinery, education, reliable electricity, roads, sanitation, financial systems, competent organizations and functioning governments.

A farmer working manually on poor land cannot produce the same value per hour as someone operating modern machinery within an advanced supply chain. The issue is usually not that the farmer works less hard; it is that each hour of work is supported by far less capital, technology and infrastructure.

2. People are born into radically different economic systems

A person’s productivity depends heavily on circumstances they did not choose:

  • whether schools actually teach;
  • whether electricity and roads work;
  • whether businesses can obtain credit;
  • whether contracts and property are protected;
  • whether the country is at peace;
  • whether women and minorities can participate fully.

Seven in ten children in low- and middle-income countries reportedly cannot understand a simple passage by age ten. The World Bank estimates that an additional year of education is associated globally with approximately 9% higher hourly earnings, although education quality matters greatly. 世界银行

3. Political power is frequently used to preserve privilege

Poor countries do not necessarily lack good policy ideas. Policies may fail because influential groups benefit from monopolies, corruption, land concentration, weak taxation or exclusion.

The World Bank’s governance research emphasizes that clientelism, elite capture and exclusion can prevent policies from producing security, growth and equity. These power structures are partly inherited from history and can reproduce themselves across generations. 世界银行

4. Conflict destroys the foundations of development

War destroys infrastructure, interrupts schooling, drives away investment and skilled workers, and forces governments to spend on survival rather than development.

In 2025, approximately 421 million people living in conflict- or instability-affected economies were surviving on less than $3 per day. The World Bank projects that these economies could contain nearly 60% of the world’s extremely poor people by 2030. 世界银行

5. Growth is often unequal

Economic growth can reduce poverty dramatically, as occurred across much of East and South Asia. The number of people in extreme poverty fell from roughly 2.3 billion in 1990 to about 831 million in 2025, largely through broad-based economic growth. 世界银行

But growth does not automatically reach everyone. It may primarily benefit:

  • landowners rather than agricultural workers;
  • monopoly owners rather than consumers;
  • highly educated urban workers rather than rural populations;
  • capital owners rather than wage earners.

So poverty is partly a production problem—not enough value is being created—and partly a distribution and power problem—people do not receive a fair or sufficient share of what is created.

6. Poverty reproduces itself

A poor household cannot easily invest in nutrition, healthcare, education, migration or a business. A child who is malnourished or leaves school early often earns less as an adult, and then has fewer resources for the next generation.

This creates a feedback loop:

Low income → low investment in health and skills → low productivity → low income.

One accident, illness or failed harvest can erase years of progress when there is no insurance or social protection.

How we can change it

There is no single solution. Durable poverty reduction requires productive growth, inclusive institutions and protection against shocks.

1. Establish peace and basic state capacity

Nothing works reliably without physical security and a government capable of collecting taxes, administering justice and delivering services.

The highest priority in fragile states is often not an advanced economic programme. It is:

stop violence, preserve institutions, provide food and healthcare, reopen schools, and rebuild basic infrastructure.

2. Provide universal foundational services

Governments should ensure that every child has access to:

  • adequate nutrition;
  • vaccinations and primary healthcare;
  • clean water and sanitation;
  • high-quality basic education;
  • electricity and digital connectivity.

These are not merely welfare expenses. They create the human capital on which future productivity depends.

3. Generate large numbers of productive jobs

Poverty cannot be permanently solved through redistribution alone. Countries need firms and workers that produce more value.

That normally means:

  • improving agricultural productivity;
  • building affordable energy and transport;
  • allowing productive firms to expand;
  • supporting manufacturing and modern services;
  • connecting businesses to domestic and international markets;
  • enabling people to move from low-productivity areas to better opportunities.

The objective should not simply be GDP growth, but job-rich, broad-based productivity growth.

4. Prevent elites and monopolies from capturing growth

Useful reforms include:

  • independent courts and enforceable contracts;
  • transparent government procurement;
  • competitive markets and antitrust enforcement;
  • secure but equitable land and property systems;
  • accountable taxation and public spending;
  • freedom for citizens, journalists and civil society to expose abuse.

Institutions must make productive activity more profitable than political connections.

5. Expand women’s economic freedom

Women need equal access to education, employment, finance, property, inheritance and protection under the law. Excluding half the population suppresses household income, national productivity and children’s welfare. The World Bank identifies women’s full participation as a driver of productivity and poverty reduction. 世界银行

6. Build a social floor

Even a productive economy will contain illness, disability, unemployment and economic shocks. Countries therefore need:

  • child benefits;
  • basic pensions;
  • unemployment insurance;
  • disability support;
  • accessible healthcare;
  • targeted cash transfers;
  • emergency assistance during recessions and disasters.

Social protection does more than relieve suffering. It prevents families from selling productive assets, withdrawing children from school or falling permanently into destitution. Yet coverage remains particularly weak in low-income countries, where only about 9.7% of people receive at least one cash social-protection benefit. International Labour Organization

7. Make growth genuinely inclusive

Tax and spending systems should fund public goods and reduce extreme concentration without destroying investment incentives. That generally means:

  • taxing economic rents, monopoly profits and valuable land effectively;
  • closing avoidance opportunities;
  • spending more effectively on health, education and infrastructure;
  • avoiding subsidies that mainly benefit the wealthy;
  • giving poorer households direct support when appropriate.

The practical formula

A useful way to summarize the solution is:

Productivity creates resources. Institutions distribute opportunities. Social protection prevents people from falling back.

Charity can alleviate immediate suffering. Cash transfers can raise consumption and protect families. Economic growth can enlarge the total amount available. But lasting mass prosperity requires all three:

  1. people must be able to produce more;
  2. they must possess enough bargaining power and access to share in the gains;
  3. they must be protected from catastrophic setbacks.

Poverty is therefore neither inevitable nor caused by a single villain. It persists when low productivity, unequal power, weak institutions and repeated shocks reinforce one another. The historical decline in extreme poverty shows that these forces can be overcome—but not through growth, redistribution or aid alone.

0
QA User A avatar
QA User A· Jul 17, 2026

根据【华尔街之狼】自动生成一张收藏版史诗叙事海报:巨大的【李治达】侧脸剪影作为外轮廓,剪影内部自动生长出最契合该主题的完整世界观、标志性场景、角色关系、象征符号、关键建筑、生物、道具与氛围。整体不是普通拼贴,而是高级的剪影轮廓填充式叙事合成,带有双重曝光式联想,但更偏电影海报与梦幻水彩插画融合风格;柔和空气透视,轻雾化过渡,纸张颗粒,边缘飞白与刷痕,大面积留白,版式克制高级,安静、宏大、神圣、怀旧、诗意、传说感。风格、色彩、场景、材质全部根据主题自动适配,所有元素必须强绑定主题,一眼识别,不要杂乱,不要硬拼贴,不要模板化背景,不要廉价奇幻素材。 李治达的参考图片:

Image Generation metadata
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QA User A avatar
QA User A· Aug 2, 2026

Can smooth three-dimensional incompressible Navier–Stokes flow develop a finite-time singularity?

details For viscosity ν>0\nu>0, consider the three-dimensional incompressible Navier–Stokes equations

tu+(u)u=p+νΔu,u=0,\partial_t u+(u\cdot\nabla)u=-\nabla p+\nu\Delta u,\qquad \nabla\cdot u=0,

on R3\mathbb R^3 or the periodic three-torus, with smooth divergence-free initial velocity u0u_0 of finite energy. Prove that every such initial datum generates a global smooth solution, or construct admissible smooth initial data for which a singularity forms in finite time. A numerical simulation of apparent blow-up, or a proof for a restricted symmetry class, is not a resolution of the full problem.

General
QA User A avatar
QA User A· Jul 19, 2026

平衡三进制是什么,如果我要用它做计算机,应该如何存储和计算,请结合图示说明。

平衡三进制(Balanced Ternary)是一种以 3 为基数、但每位取值为 {-1, 0, +1}(而非普通三进制的 {0, 1, 2})的数制。通常用符号 {−, 0, +}{T, 0, 1} 表示,其中 T 代表 −1。

基本原理

每一位的权重是 3 的幂(3⁰=1, 3¹=3, 3²=9, 3³=27…),但系数可以是负的。

一个数的值 = Σ(dᵢ × 3ⁱ),其中 dᵢ ∈ {−1, 0, +1}

例如十进制的几个数:

**最大优点:天然表示负数,无需符号位、补码或反码。**一个数取反只需把每位的 + 和 − 互换。

如何存储

需要三态存储单元("trit" 三进制位),每个 trit 表示 3 个状态。物理实现思路:

也可用磁通方向、电流方向等。历史上苏联的 Setun 计算机(1958) 就是真正用平衡三进制制造的。

如何运算

加法

设计一个加法表,逢 ±3 进/借位。单位加法表:

进位规则:

  • 当两位相加得 +2:本位写 −1,向高位进 +1
  • 当两位相加得 −2:本位写 +1,向高位进 −1

示例:计算 2 + 2 = 4,即 +- + +-

减法

无需专门的减法器——先取反(+/−互换)再加法即可:

比较 / 符号判断

只看最高非零位即可判断正负:

这比二进制补码判断符号更直接。

整体结构示意

为何理论上有吸引力

主要优势包括:负数表示对称无需补码、取反极其简单、舍入更均匀(截断即四舍五入)、信息密度上 3 接近最优基数 e≈2.718。

主要劣势是缺乏可靠廉价的三态电子元件——现代半导体天然是双稳态(开/关),三态电路成本高、抗噪差,这也是二进制最终胜出的根本原因。

需要我用具体某个数(比如你给一个十进制数)走一遍完整的加法或乘法运算过程吗?

做好了——这是一个可交互的演示页面,包含三部分:

架构图 用 SVG 画出了三进制 CPU 的结构: Trit 寄存器组、以「加法表 + 取反」为核心的 ALU、三态存储(+V/0/−V 对应 +1/0/−1),以及靠"最高非零位"判正负的控制单元。

逐步运算器 是核心——输入任意两个十进制数,选 + − × ÷,它会一步步动画展示三进制内部怎么算:

  • 加法: 逐位相加,逢 ±3 进位,高亮当前位并显示进位行
  • 减法: 演示 A − B = A + (−B),先把 B 每位 +/− 对调再走加法
  • 乘法: 移位相加,逐位扫描乘数
  • 除法: 重复减法求商和余数

每一步下方都有中文解释,可以用「上一步/下一步」反复看。+ 显示为绿色、− 为红色、0 为灰色。

速查对照表 列出常见十进制数对应的平衡三进制及其展开式。

转换逻辑我已用 −50 到 50 全程往返测试通过。你可以直接打开试试,比如输入 14 × 8 看移位相加,或 14 − 8 看取反加法的过程。

1十进制 平衡三进制
2 0 0
3 1 +
4 2 +- ( 3 + (-1) = 2 )
5 3 +0
0
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